CN112856896B - Refrigerator with a door - Google Patents
Refrigerator with a door Download PDFInfo
- Publication number
- CN112856896B CN112856896B CN202010140938.9A CN202010140938A CN112856896B CN 112856896 B CN112856896 B CN 112856896B CN 202010140938 A CN202010140938 A CN 202010140938A CN 112856896 B CN112856896 B CN 112856896B
- Authority
- CN
- China
- Prior art keywords
- power supply
- compressor
- heater
- substrate
- board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention stores the wiring from the heater in the substrate with the heater as much as possible. The refrigerator has: a power plug capable of being electrically connected to an industrial power supply; a power supply substrate electrically connected to the power supply plug; a plurality of heaters electrically connected to the power supply substrate, respectively; a plurality of switches capable of switching respective on-off of the heaters; a control substrate electrically insulated from the power plug; a heater microcomputer disposed on the power supply substrate and driving each switch according to an instruction from the control substrate; and a communication line communicatively connecting the heater microcomputer and the control substrate.
Description
Technical Field
The present invention relates to a refrigerator.
Background
In patent document 1, a refrigerator control board housing portion 79 for housing a control board 71 is provided at the center of the rear surface of the refrigerator, and a power supply unit board housing portion 82 for housing a power supply unit board 67 is provided in a machine room 83 (0027 to 0030, fig. 6). A heater driver 60 (FIG. 1) for driving the heaters 61-64 is provided on the control board 71. The commercial power source 1 is supplied to the power source unit substrate 67. The power supply unit substrate 67 includes external connection terminals 72(0024, 0025) for connection to the outside of a personal computer or the like.
Documents of the prior art
Patent literature
Patent document 1: japanese patent laid-open No. 2001-289549
Disclosure of Invention
Problems to be solved by the invention
Although the driving power supply for the plurality of heaters 61 to 64 in patent document 1 is not clear, it is preferable that the heaters 61 to 64 be driven by a commercial power supply or a power supply with a small number of switching times from the commercial power supply because a loss occurs as voltage conversion or ac-dc conversion from the commercial power supply. In this way, it is preferable that the heaters 61 to 64 are electrically connected to the power supply unit substrate 67 which facilitates the supply of the commercial power supply 1, and thus, in the case where the control substrate 71 of patent document 1 includes the heater driver 60, there is room for improvement in wiring efficiency and the like.
Means for solving the problems
The present invention, which has been made in view of the above circumstances, is a refrigerator including:
a power plug capable of being electrically connected to an industrial power supply;
a power supply substrate electrically connected to the power supply plug;
a plurality of heaters electrically connected to the power supply substrate, respectively;
a plurality of switches capable of switching respective on-off of the heaters;
a control substrate electrically insulated from the power plug;
a heater microcomputer disposed on the power supply board and driving the switches according to a command from the control board; and
and a communication line for communicatively connecting the heater microcomputer and the control board.
Drawings
Fig. 1 is a front view of a refrigerator of an embodiment.
Fig. 2 is a longitudinal sectional view of the refrigerator of the embodiment.
Fig. 3 is a circuit block diagram of a power supply board and a control board of the refrigerator according to the embodiment.
Fig. 4 is a schematic front view of the control board according to the embodiment.
Fig. 5 is a plan view of the machine room of the embodiment.
Fig. 6 is a control flowchart of the compressor according to the embodiment.
Fig. 7 is a setting diagram of threshold values for determining the high temperature of the compressor and the power supply board according to the embodiment.
Description of the symbols
1-refrigerator, 2-refrigerator compartment, 3-ice making compartment, 4-upper freezer compartment, 5-lower freezer compartment, 6-vegetable compartment, 7-refrigerator compartment door switch, 8-refrigerator compartment left door, 9-refrigerator compartment right door, 10-upper hinge, 11-lower hinge, 13-cooler, 14-compressor, 15-freezer compartment fan, 16-machine compartment, 17-power supply board, 18-reactor, 19-machine compartment fan, 20-power plug, 21-heater load wiring (dotted line), 22-defrosting heater, 23-refrigerator compartment bottom heater, 24-rotary partition heater, 25-vegetable compartment heater, 26-control board, 27-control power supply wiring, 28-refrigerator compartment temperature sensor, 29-refrigerator compartment temperature sensor, 30-control system load wiring (dotted line), 31-in-compartment lamp LED, 32-noise filter circuit, 33-converter circuit, 34-inverter module, 35-compressor microcomputer, 36-switching power supply circuit, 37-12V load drive circuit, 38-DC/DC conversion circuit, 39-in-box control microcomputer, 40-heater drive circuit, 41-heater microcomputer, 50-outer box, 51-inner box, 52-heat insulating material, 53-back panel, 91-compressor temperature sensor, 92-substrate temperature sensor, 93-12V-series load drive circuit (output signal side), 94-12V-series load drive circuit (input signal side), 95-12V-series load drive wiring (output signal side), 96-12V-series load drive wiring (input signal side).
Detailed Description
[ refrigerator 1]
Fig. 1 is a front view of a refrigerator 1 of the present embodiment. The refrigerator 1 includes a refrigerating chamber 2, an ice-making chamber 3, an upper freezing chamber 4, a lower freezing chamber 5, and a vegetable chamber 6 as storage chambers in this order from above. A refrigerating room left door 8 and a refrigerating room right door 9 for opening and closing the refrigerating room 2 are installed in a front face of the refrigerating room 2 in a half manner, and are fixed by an upper hinge 10 and a lower hinge 11, respectively. The front openings of the ice making chamber 3, the freezing chambers 4, 5, and the vegetable chamber 6 are opened and closed by a drawer type door. A known door sensor is disposed near each door, and can detect opening and closing of each door.
Fig. 2 is a longitudinal sectional view showing the structure inside the refrigerator 1. In the refrigerator 1, cold air is generated by a freezing cycle including a cooler 13 and a compressor 14, and the cold air is circulated by one or more fans typified by a freezing chamber fan 15, thereby cooling each of the storage chambers 2 to 6 of the refrigerator 1 to a predetermined temperature range. The compressor 14 and the like are controlled by the power supply board 17, and the fan and the like are controlled by the control board 26. Each storage chamber is insulated from the outside air by a heat insulating material 52 interposed between an outer box 50 facing the outside air and an inner box 51 facing the inside of the storage chamber.
The refrigerating compartment 2 is provided with a refrigerating compartment temperature sensor 29, an in-compartment lamp LED31, a shelf, and a rear panel 53 located behind the shelf, and a control board 26 described below is preferably provided behind the rear panel 53.
The cooler 13 is located behind any one of the freezing chambers 3, 4, and 5, and a defrosting heater 22 is provided below the cooler 13. The refrigerator 1 may include, as other heaters, a refrigerating chamber bottom heater 23, a vegetable chamber heater 25, and a rotary spacer heater 24, which are disposed on the wall surfaces of the refrigerating chamber 2 and the vegetable chamber 6 to suppress dew condensation, for example, and the rotary spacer heater 24 is disposed on any one of the refrigerating chamber doors 8 and 9 and is a known rotary spacer that contributes to heat insulation between the refrigerating chamber doors 8 and 9.
[ outline of Power supply substrate 17 (non-insulating substrate) ]
The power supply board 17 is a board at least partially having a region not insulated from the commercial power supply, and is a board having a circuit for driving a load of a high-voltage system such as the compressor 14 and the heaters 22 to 25. The power supply board 17 is provided on the back side (rear side) of the refrigerator 1 and is housed in the machine chamber 16 in which the compressor 14 is housed. The machine chamber 16 is also provided with a machine chamber fan 19 that cools components in the machine chamber 16 such as the reactor 18 and the compressor 14. The power supply board 17 is electrically connected to a commercial power supply via a power plug 20. Further, the machine chamber 16 may be located on the upper back side or the lower back side of the refrigerator 1. A machine chamber cover 161 is detachably disposed in a range including at least the rear surface side of the machine chamber 16.
[ outline of the control substrate 26 (insulating substrate) ]
The control board 26 is a board insulated from the commercial power supply even if the power plug 20 is electrically connected to the commercial power supply, and has a circuit for driving a load of a low-voltage system (for example, DC12V) such as a fan or a lighting. The control board 26 is disposed in any of the storage chambers. For example, the control board 26 is disposed in the refrigerating chamber 2, which is the storage chamber farthest from the machine chamber 16 (power board 17). Since the control board 26 is less necessary for the user to operate, it is preferably provided behind the rear panel 53 on the rear side of the storage room.
A control system load wiring 30 (dotted line in fig. 2) as an output wiring of the control board 26 is connected to the freezing chamber fan 15, the machine chamber fan 19, the interior lamp LED31, and a motor for opening and closing a damper for opening and closing a cool air duct, which are examples of fans.
The control board 26 is provided with input circuits for sensors and switches, and connected to a refrigerating compartment temperature sensor 29, a freezing compartment temperature sensor 28, a sensor for detecting opening and closing of a door, a refrigerating compartment door switch 7, and the like. Input wiring is not shown.
[ Circuit blocks of substrates 17, 26 ]
Fig. 3 is a circuit block diagram showing an electric system of the refrigerator 1.
The power supply board 17 and the control board 26 have portions connected to each other for communication and electrical connection, and can transmit and receive information and electric power. For example, the control board 26 and the power supply board 17 are communicatively connected by inter-microcomputer communication and a control power supply wiring 27 (a chain line in fig. 2). Specifically, the heater microcomputer 41 of the power supply board 17 is communicatively connected to the in-box control microcomputer 39 of the control board 26, and as the inter-microcomputer communication, for example, serial communication is performed. Thus, if the number of heaters is two or more (four in the present embodiment), the in-box control microcomputer 39 can control each heater via the heater microcomputer 41 using a smaller number of communication lines (for example, one) than the number of heaters.
The low-voltage side generated by the switching power supply circuit 36 of the power supply board 17 is electrically connected to the DC/DC converter circuit 38 of the control board 26, and 12V (control system) generated by the switching power supply circuit 36 is supplied to the DC/DC converter circuit 38.
Further, the compressor control microcomputer 35 of the power supply board 17 is communicatively connected to the in-box control microcomputer 39 of the control board 26.
[ Circuit of Power supply substrate 17 ]
The power supply board 17 receiving power from the commercial power supply includes: a switching power supply circuit 36 that generates a low-voltage dc power supply based on the high-voltage dc voltage; an inverter module 34 that supplies a voltage to a motor of the compressor 14; a compressor microcomputer 35 that controls the inverter module 34; and a heater microcomputer 41 that controls the plurality of heaters. The power supply board 17 preferably includes a noise filter circuit 32 for reducing noise of the commercial power supply and a reactor 18 for suppressing a harmonic current.
(Generation of a DC Voltage from a commercial Power supply)
The commercial power supplied to the refrigerator 1 via the power plug 20 is preferably an ac voltage shaped by the noise filter circuit 32 and the reactor 18. The ac voltage is supplied to the converter circuit 33 and converted into a high-voltage DC voltage (e.g., DC 280V).
(high Voltage DC Voltage based compressor 14 drive)
A portion of the high voltage DC voltage (e.g., DC280V) is supplied to the inverter module 34.
The inverter module 34 converts the high voltage dc voltage into an ac voltage according to a control signal from the compressor microcomputer 35 and outputs the ac voltage to the motor of the compressor 14. Thereby, the compressor 14 is controlled at variable speeds.
(Generation of Low-Voltage Power supply)
A portion of the high voltage DC voltage (e.g., DC280V) is supplied to the switching power supply circuit 36. The switching power supply circuit 36 down-converts the high-voltage dc voltage from the converter circuit 33 into a low-voltage power supply voltage by using a switching transformer. Examples of the power source down-converted by the switching power source circuit 36 include P15V (power source system) used as a power source for a control circuit in the inverter module 34, and P3.3V (power source system) used as a power source for the compressor control microcomputer 35 and its peripheral circuits. The inverter module 34 and the compressor control microcomputer 35 are electrically connected to the commercial power source, and therefore, the power source is a non-isolated power source. In order to control the inverter module 34, the reference potential (P0V) of P15V (power supply system) and P3.3V (power supply system) is the same as the reference potential of the dc voltage from the converter circuit 33, and is configured to be non-isolated from the commercial power supply.
As a power source down-converted by the switching power supply circuit 36, there is also 12V (control system) supplied to the control board 36 via a control power supply wiring. The 12V (control system) is insulated from the commercial power supply by a switching transformer. The 12V (control system) is electrically connected to the control board 26 via a control power supply wiring.
In fig. 3, the primary side (non-insulated) region is a circuit configuration that is not isolated from the commercial power source (power plug 20), and the secondary side (insulated) region is a circuit configuration that is insulated from the commercial power source.
(Heater drive)
The power supply substrate 17 further includes: a heater driving circuit 40 having switches for turning on and off the power supply to the heaters 22 to 25; and a heater microcomputer 41 that controls switching of the heater driving circuit 40 (for example, an insulating element such as a photocoupler or an SSR can be used). The high-voltage power supply passed through the noise filter circuit 32 is preferably supplied to the heater drive circuit 40. The heater microcomputer 41 outputs an on-off command of each switch via a photocoupler, for example. This command is input from the below-described in-box control microcomputer 39 to the heater microcomputer 41 via a communication line.
Heater load wiring 21 (broken lines in fig. 2) is routed from the power supply substrate 17 to the heater loads 22 to 25. As the heater load, a defrosting heater 22 for removing frost attached to the cooler 13, a refrigerating compartment bottom heater 23 for adjusting the temperature of the lower part of the refrigerating compartment, a rotary partition heater 24 for preventing dew from adhering to a rotary partition provided to prevent leakage of cold air between the side-by-side doors, a vegetable compartment heater 25 for adjusting the temperature of the vegetable compartment 6, and the like are provided.
(reading operation information data (control record) from the machine room 19 side)
The operation information data (operation records) at each time, such as the detection values of various sensors of the refrigerator 1, the rotation speed of the compressor, and the on-off state of the heater, are stored in the memory of the refrigerator 1, and can be used for inspection before shipment from a factory or for maintenance after installation in a home or the like, using the operation information data. In order to connect the memory to another device by wired connection, it is necessary to establish wired connection with a read connector or the like of a substrate on which the memory is disposed.
The heater microcomputer 41 is connected to a memory 421 disposed on the power supply board 17, and stores operation information data such as the temperature sensor values received from the in-tank control microcomputer 39 in the memory 421 for a fixed period. The power supply board 17 is provided with a read connector 431 for accessing the memory 421. The read connector 431 is insulated from the industrial power supply.
The memory 421 outputs data to other devices such as a personal computer via the read connector 431. In the case of an industrial test before factory shipment, operation confirmation can be performed using the operation information data or analysis can be performed when a failure occurs, but in the case of a refrigerator in a state in which the refrigerator is assembled and before factory shipment, it is highly convenient if the operation information data can be accessed from the machine room 19.
In order to prevent an electric shock from occurring to an operator using the reading connector 431 and to prevent other devices such as a personal computer from being broken down by grounding, the heater microcomputer 41, the memory 421, and the reading connector 431 are long configured to operate by a 5V (control system) power supply insulated from a commercial power supply. The same applies to the reading connector 43 described below. The memory 42 and the reading connector 43 are also provided on the control board 26 side, but access from the refrigerator 1 after assembly and before shipment is more complicated in the storage compartment in which the control board 26 is disposed, for example, in the rear area of the detachable rear panel 53, than in the machine compartment 19.
Therefore, in the present embodiment, since the reading connector 431 is provided on the power supply board 17 side, access can be made via the machine room 16 even in the refrigerator 1 in which the control board 26 is difficult to access after assembly. Since the memory 421 is generally used for the degree of testing before shipment, a relatively large memory capacity is not required, and a small capacity smaller than the memory 42 can be achieved.
The memory 421 may not necessarily be connected to the heater microcomputer 41, and may be connected to another microcomputer electrically insulated from the power plug 20.
[ Circuit of the control substrate 26 ]
The control board 26 includes an in-box control microcomputer 39 that acquires detection values of the sensors and the door switch and operation data of a user via the operation board, and controls the fans, the lighting, the damper, and the like based on the sensing information. The in-box control microcomputer 39 is preferably grounded.
(Generation of Power supply for use in Driving sensor or the like)
The control board 26 generates a 5V (control system) power supply (second dc voltage) for driving the sensor by using a 12V (control system) power supply (first dc voltage) supplied from the power supply board 17. Therefore, the control board 26 has a DC/DC conversion circuit 38 for further stepping down a 12V (control system) power supply. The DC/DC conversion circuit 38 is preferably connected to ground.
The 5V (control system) is used as a power source for elements for transmitting and receiving low-voltage detection signals and control signals, such as the in-box control microcomputer 39, sensors, a door switch, and the in-box control microcomputer 39. In particular, if noise is superimposed on the power supply of the sensor, the detection accuracy of the sensor is degraded. For example, if noise is superimposed on a detection signal of a temperature sensor that detects temperature using an analog voltage, the temperature is erroneously detected. In the present embodiment, the 5V (control system) is generated on the control board 26 side, and the power supply can be generated remotely from the configuration in which the noise is large due to the high voltage, such as the inverter module 34, the compressor control microcomputer 35, and the switching power supply circuit 36. Therefore, a decrease in detection accuracy of the sensor can be suppressed.
To describe this point in detail, the DC/DC converter circuit 38 uses an IC that performs output voltage adjustment by a high-frequency switching operation such as a DC/DC converter in order to achieve high efficiency. Since the DC/DC converter adjusts the switching cycle while monitoring the output voltage, the influence of external noise may be concerned. By mounting the DC/DC converter circuit 38 on the control board 26 side, the inverter module 34 and the switching power supply circuit 36, which have large noise, are separated from each other, and the influence of external noise can be reduced.
In general, the DC/DC converter circuit 38 often uses an IC for performing the above-described high-frequency switching operation and a coil for accumulating electric energy as constituent elements, and high-frequency noise, leakage magnetic flux, and the like emitted from the elements overlap with peripheral devices and wirings, and malfunction may occur.
Fig. 4 is a schematic front view of the control board 26 according to the present embodiment. The DC/DC converter circuit 38 is disposed on the substrate edge side of the control substrate 26. The wiring 80 connected to the control board 26 is configured not to pass through the DC/DC converter circuit 38 in the vertical direction. Further, a ground pattern 82 for controlling the system power supply is preferably provided so as to surround the DC/DC converter circuit 38 and the connector 81. This makes it possible to form a structure in which noise is less likely to be superimposed on other control elements and other wiring patterns on the control board 26.
The freezing chamber fan 15, the machine chamber fan 19, the in-box lamp LED31, and the like are driven by 12V (control system) supplied from the power supply board 17. The in-box control microcomputer 39 has a 12V load driving circuit 37 that drives the 12V load.
(reading operation information data from the storage compartment side (control recording))
The control board 26 has a memory 42 for storing the detected values of the sensors acquired by the in-tank control microcomputer 39, the fan, the lighting, and the driving state of the compressor 14, and a reading connector 43 for allowing access to the memory 42. After the refrigerator is installed in a home or the like, access from the reading connector 431 of the power supply board 17 is difficult because the machine room 19 is usually in contact with a wall surface. Therefore, in order to improve accessibility during maintenance after mounting or the like, the memory 42 and the reading connector 43 are also provided on the control board 26 side.
In the present embodiment, the reading connectors are provided in the machine room 19 accessible from the back side of the refrigerator 1 and in the storage room accessible from the front side, but in view of the difficulty in accessing from the machine room 19 side at the time of maintenance at home or the like, the reading connectors may be provided on the side surfaces, not only in the storage room accessible from the front side. For example, a control board and a reading connector may be provided on a side wall of the storage chamber.
(Driving commands for heaters 22 to 25)
The in-box control microcomputer 39 determines the energization rate of each heater 22 to 25 by using the detection value of each sensor (temperature sensor, humidity sensor), and transmits the energization rate of each heater to the heater microcomputer 41 which is communicatively connected. The heater microcomputer 41 drives the heater driving circuit 40 in accordance with an instruction from the in-tank control microcomputer 39. The heater drive circuit 40 receives a duty command to switch the energization state of each heater with respect to the commercial power supply.
The power supply board 17 is provided with a heater microcomputer 41 for the purpose of reducing the number of wirings between the boards, and the instruction of the heater microcomputer 41 is executed by the in-box control microcomputer 39. Therefore, communication between the heater microcomputer 41 and the in-box control microcomputer 39 may not be possible for some reason such as disconnection of the communication line. In the present embodiment, when the heater microcomputer 41 detects that the communication with the in-tank control microcomputer 39 is interrupted, the operation of the heater is stopped or the duty ratio is lowered in principle in order to prevent an excessive temperature rise of the heater. However, the duty ratio of the heater that is likely to cause dew condensation, for example, the partitioning member heater 24, is maintained at a predetermined value or more, for example, 50% or more.
[ layout of machine room ]
Fig. 5 is a plan view of the inside of the machine chamber 16 of the present embodiment.
The machine room 16 is provided with a compressor 14 that is not insulated from the commercial power supply 1, a machine room fan 19 that is insulated from the commercial power supply 1 and controlled by the in-box control microcomputer 39 of the control board 26, a compressor temperature sensor 91 that is disposed in, for example, a housing of the compressor 14 and detects temperature information of the compressor 14, a power supply board 17, and a board temperature sensor 92 that is disposed in the vicinity of the power supply board 17. The compressor 14 is disposed on one side of the machine room fan 19, and the power supply board 17 is disposed on the other side. As illustrated in fig. 3, power is supplied from the 12V load driving circuit 37 to drive the mechanical room fan 19, and air flows are generated in the compressor 14, the power board 17, and the surroundings thereof to perform air cooling.
[ control when the machine room fan 19 is abnormal ]
The control board 26 includes a 12V load drive circuit 93 for outputting a signal from the in-box control microcomputer 39 to the 12V load drive circuit 37, a 12V load drive wiring 95 for outputting a signal from the 12V load drive circuit 37 to the 12V load, a 12V load drive wiring 96 for feeding back a drive state (a rotation speed pulse, a current, hall sensor information, and the like) of the machine room fan 19, and a 12V load drive circuit 94.
When the in-box control microcomputer 39 cannot detect a feedback signal from the machine room fan 19, for example, when the feedback is the rotation speed 0 and the current 0, it is determined that an abnormality has occurred in the machine room fan 19. This is considered to be a case where the substrate circuit patterns such as the circuits 37, 93, and 94 and the wirings 95 and 96 are disconnected, and the robot chamber fan 19 is normally driven but feedback is not obtained, or a case where the robot chamber fan 19 actually fails and cannot be driven. In the former case, since the compressor 14 and the power supply board 17 can be cooled, there is almost no problem even if the compressor 14 is continuously driven. In the latter case, since the compressor 14 and the power supply board 17 cannot be cooled, the rotational speed of the compressor 14 is appropriately limited or stopped by observing the temperature states of the compressor 14 and the power supply board 17. Since the amount of heat generated by the power supply board 17, the reactor 18 and the inverter module 34 provided in the vicinity thereof changes according to the rotation speed of the compressor 14, it is preferable to suppress the rotation speed of the compressor 14 when the power supply board 17 is overheated.
The abnormality determination result of the machine room fan 19 is used in step S101 of the control flow described below. Note that, instead of determining that the feedback is abnormal at the moment when the feedback is not obtained, the determination may be performed when the feedback is not obtained a predetermined number of times in succession.
Fig. 6 is a flowchart of the rotational speed control of the compressor 14. When the compressor temperature sensor 91 is at a high temperature (yes in step S100), the compressor 14 is stopped (step S105). When the compressor temperature sensor 91 is not at a high temperature (no in step S100), the compressor 14 is stopped (step S105) when the machine room fan 19 is abnormal (yes in step S101) and the substrate temperature sensor 92 is at a high temperature (yes in step S102). On the other hand, when the compressor temperature sensor 91 is not at a high temperature (no in step S100), if the machine room fan 19 is abnormal (yes in step S101) and the substrate temperature sensor 92 is not at a high temperature (no in step S102), the rotation speed of the compressor 14 is restricted to be low (steps S103 and S106). When the compressor temperature sensor 91 is not at a high temperature (no in step S100), and when the machine room fan 19 is not abnormal (no in step S101), it can be determined that there is no problem even if the compressor 14 is driven, and therefore, the driving can be performed as usual (steps S104 and S106).
Fig. 7 is a setting diagram of the threshold values for determining the high temperature of the compressor 14 and the power supply board 17. The hysteresis region (dead zone) may be provided for determining the high temperature or non-high temperature of the compressor temperature sensor 91 or the substrate temperature sensor 92. The hysteresis region is a numerical range in which the non-high temperature determination value and the high temperature determination value are set to different values and defined as upper and lower limits. If the detected temperature exceeds the high temperature determination value, the temperature is determined to be "high" until the detected temperature is lower than the non-high temperature determination value. If the detected temperature is lower than the non-high temperature determination value, it is determined as "non-high temperature" until the detected temperature is higher than the high temperature determination value. In the case illustrated in fig. 7, since the detected temperature is higher than the high temperature determination value at time T1, the temperature is determined to be high thereafter, and is determined not to be high until then.
[ other technical ideas ]
The present application includes the following technical ideas.
(item 1)
A refrigerator has:
a power plug capable of being electrically connected to an industrial power supply;
a power supply substrate electrically connected to the power supply plug;
a plurality of heaters electrically connected to the power supply substrate, respectively;
a plurality of switches capable of switching respective on-off of the heater;
a control substrate electrically insulated from the power plug;
a heater microcomputer disposed on the power supply board and driving the switches according to a command from the control board; and
and a communication line for communicatively connecting the heater microcomputer and the control board.
(item 2)
A refrigerator has:
a plurality of chambers;
a power plug capable of being electrically connected to an industrial power source;
a power supply substrate electrically connected to the power plug and having a part or all of a switching power supply circuit, an inverter module, and a compressor control microcomputer;
a control substrate;
a DC/DC converter circuit disposed on the control board and generating a DC voltage lower than the commercial power supply; and
a sensor driven by the direct-current voltage,
the power supply substrate and the control substrate are disposed in different chambers.
(item 2 focusing on the situation)
In patent document 1, a refrigerator control board storage 79 for storing a control board 71 is provided in the center of the rear surface of the refrigerator, and a power supply board storage 82 for storing a power supply board 67 is provided in the machine room 83 (0027 to 0030, fig. 6). A heater driver 60 (FIG. 1) for driving the heaters 61-64 is provided on the control board 71. The commercial power source 1 is supplied to the power source unit substrate 67. The power source 66 is provided in a power source portion substrate including the inverter circuit portion 17, and the control substrate 71 is not provided with a power source circuit (0028, 0030).
If power supply 66 is formed in the vicinity of a noise source such as inverter circuit unit 17, noise is likely to be superimposed on power supply 66. When the sensor or the like is driven by the voltage of the power supply 66, the detection accuracy of the sensor is lowered.
(item 3)
A refrigerator has a reading connector on each of a back surface side and a front surface side or a side surface side, and the reading connector can access one or more memories storing operation information data.
(item 3 eye-catching situation)
As described in patent document 1, if the external connection terminals 72 are provided only on the substrate disposed on the back side, the back side of the refrigerator is usually in contact with the wall surface in the mounted state at home, and thus access is difficult.
(item 4)
A refrigerator is provided with:
a compressor;
a compressor temperature sensor disposed in the vicinity of the compressor;
a power supply board which is not insulated from the compressor;
a substrate temperature sensor disposed in the vicinity of the power supply substrate;
a machine room fan acting on the fluid around the compressor and the power supply board; and
a machine chamber for accommodating the compressor, the compressor temperature sensor, the power supply board, the board temperature sensor, and the machine chamber fan,
stopping the compressor when the temperature sensor of the compressor is high,
in the case where the abnormality of the above-described machine room fan is detected,
when the substrate temperature sensor is not at high temperature, the compressor is driven,
and stopping the compressor when the substrate temperature sensor is at a high temperature.
(item 4 eye-catching situation)
The following are disclosed in japanese patent laid-open publication No. 2009-264660: if the machine room fan (C fan) 20 is abnormally stopped, the controller 21 repeatedly restarts the C fan 20 up to a predetermined number of times N (for example, three times), and if the restart is actually performed, it is determined that the C fan 20 is not in failure and the normal operation is returned to (0025). If the compressor cannot be restarted, the compressor is stopped (0027).
When the abnormal stop of the machine room fan is detected, it is actually considered that the machine room fan is not driven or the abnormal stop is determined due to a broken path or the like for transmitting a feedback signal of the machine room fan to the microcomputer. In the latter case, since the machine room fan itself can be driven, the necessity of immediately stopping the compressor is small. When the compressor is stopped, cooling in the refrigerator is stopped, which causes a large loss to the user.
Claims (10)
1. A refrigerator, characterized by having:
a power plug capable of being electrically connected to an industrial power supply;
a power supply substrate electrically connected to the power supply plug;
a plurality of heaters electrically connected to the power supply substrate, respectively;
a plurality of switches capable of switching respective on-off of the heater;
a control substrate electrically insulated from the power plug;
a heater microcomputer disposed on the power supply board and driving the switches according to a command from the control board; and
a communication line for communicatively connecting the heater microcomputer and the control board,
the control of each heater is executed by an in-box control microcomputer of the control board via the heater microcomputer by using the communication line.
2. The refrigerator according to claim 1, characterized in that it has:
a machine chamber on the back side of the refrigerator for accommodating the power supply substrate;
a storage chamber for storing the control substrate; and
a door for opening and closing the storage chamber.
3. The refrigerator according to claim 1 or 2,
the heater microcomputer stops energization of at least one of the plurality of heaters or decreases a duty ratio in response to occurrence of communication abnormality between the heater microcomputer and the control board.
4. The refrigerator according to claim 1 or 2, characterized by having:
a storage chamber;
two split doors for opening and closing the storage chamber;
a rotary separator arranged on at least one side of the door; and
a rotary partition heater which is arranged on the rotary partition and is one of the heaters,
the heater microcomputer maintains a duty ratio of the energization of the partitioning member heater to be equal to or more than a predetermined value in response to occurrence of communication abnormality between the heater microcomputer and the control board.
5. The refrigerator according to claim 1, comprising:
a compressor;
a compressor temperature sensor disposed in the vicinity of the compressor;
a power supply board which is not insulated from the compressor;
a substrate temperature sensor disposed in the vicinity of the power supply substrate;
a machine room fan acting on the fluid around the compressor and the power supply board; and
a machine chamber for accommodating the compressor, the compressor temperature sensor, the power supply board, the board temperature sensor, and the machine chamber fan,
stopping the compressor when the temperature sensor of the compressor is high,
in the case where the abnormality of the above-described machine room fan is detected,
when the substrate temperature sensor is not at high temperature, the compressor is driven,
and stopping the compressor when the substrate temperature sensor is at a high temperature.
6. The refrigerator according to claim 5,
when the abnormality of the machine room fan is detected, the rotation speed of the compressor is reduced when the substrate temperature sensor is not at a high temperature.
7. The refrigerator according to claim 5 or 6,
the determination values of the high temperature and the non-high temperature of the compressor temperature sensor and/or the substrate temperature sensor are different from each other,
if the detected temperature exceeds the high temperature determination value, then determining the temperature as high until the detected temperature is lower than the non-high temperature determination value,
if the detected temperature is lower than the non-high temperature determination value, it is determined to be non-high temperature thereafter until the detected temperature is higher than the high temperature determination value.
8. The refrigerator according to claim 1,
the rear surface side and the front surface side or the side surface side are respectively provided with a reading connector, and the reading connector can access more than one memory storing the operation information data.
9. The refrigerator according to claim 8, characterized in that:
a storage chamber with an opening at the front side;
a machine room having a machine room cover detachably attached to a region including a back surface side;
a control substrate arranged in the storage chamber;
a control board connector as the reading connector, which is provided on the control board;
a power supply substrate disposed in the machine chamber; and
and a power board connector as the reading connector disposed on the power board.
10. The refrigerator according to claim 9, characterized in that:
a control board memory as the memory, which is accessible from the control board connector; and
a power board memory as the memory accessible from the power board connector,
the storage capacity of the control board memory is larger than that of the power board memory.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010973612.4A CN112856899B (en) | 2019-11-12 | 2020-03-03 | Refrigerator with a door |
| CN202010975449.5A CN112856902A (en) | 2019-11-12 | 2020-03-03 | Refrigerator with a door |
| CN202010973589.9A CN112856898B (en) | 2019-11-12 | 2020-03-03 | Refrigerator with a door |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-204376 | 2019-11-12 | ||
| JP2019204375A JP7280807B2 (en) | 2019-11-12 | 2019-11-12 | refrigerator |
| JP2019204376A JP7304271B2 (en) | 2019-11-12 | 2019-11-12 | refrigerator |
| JP2019204383A JP7305519B2 (en) | 2019-11-12 | 2019-11-12 | refrigerator |
| JP2019-204375 | 2019-11-12 | ||
| JP2019-204383 | 2019-11-12 |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010973612.4A Division CN112856899B (en) | 2019-11-12 | 2020-03-03 | Refrigerator with a door |
| CN202010973589.9A Division CN112856898B (en) | 2019-11-12 | 2020-03-03 | Refrigerator with a door |
| CN202010975449.5A Division CN112856902A (en) | 2019-11-12 | 2020-03-03 | Refrigerator with a door |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112856896A CN112856896A (en) | 2021-05-28 |
| CN112856896B true CN112856896B (en) | 2022-06-24 |
Family
ID=75996115
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010973589.9A Active CN112856898B (en) | 2019-11-12 | 2020-03-03 | Refrigerator with a door |
| CN202010140938.9A Active CN112856896B (en) | 2019-11-12 | 2020-03-03 | Refrigerator with a door |
| CN202010973612.4A Active CN112856899B (en) | 2019-11-12 | 2020-03-03 | Refrigerator with a door |
| CN202010975449.5A Pending CN112856902A (en) | 2019-11-12 | 2020-03-03 | Refrigerator with a door |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010973589.9A Active CN112856898B (en) | 2019-11-12 | 2020-03-03 | Refrigerator with a door |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010973612.4A Active CN112856899B (en) | 2019-11-12 | 2020-03-03 | Refrigerator with a door |
| CN202010975449.5A Pending CN112856902A (en) | 2019-11-12 | 2020-03-03 | Refrigerator with a door |
Country Status (1)
| Country | Link |
|---|---|
| CN (4) | CN112856898B (en) |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3287974A (en) * | 1964-03-30 | 1966-11-29 | Holley Carburetor Co | Ice condition detection device |
| EP0190642B1 (en) * | 1985-01-31 | 1992-05-06 | Hitachi, Ltd. | Magnetic bubble memory module |
| CN86206532U (en) * | 1986-11-21 | 1987-11-07 | 唐骐 | Refrigerator temp. display and controller |
| JP2762450B2 (en) * | 1988-03-23 | 1998-06-04 | 富士ゼロックス株式会社 | Display device for user interface, display method using the device, and recording device |
| JPH05141837A (en) * | 1991-11-18 | 1993-06-08 | Toshiba Corp | Cold storage box |
| JP3787987B2 (en) * | 1997-10-13 | 2006-06-21 | 三菱電機株式会社 | Inverter electrical parts of air conditioner |
| JP2001289549A (en) * | 2000-04-05 | 2001-10-19 | Hitachi Ltd | Refrigerator control device |
| US6742349B1 (en) * | 2000-05-16 | 2004-06-01 | Sanyo Electric Co., Ltd. | Equipment sensing system and equipment control device |
| JP2006278847A (en) * | 2005-03-30 | 2006-10-12 | Seiko Epson Corp | Equal-length wiring structure, and recording device, and electronic device having same |
| CN100541074C (en) * | 2005-05-10 | 2009-09-16 | 乐金电子(天津)电器有限公司 | Kraut refrigerator |
| KR101316023B1 (en) * | 2007-08-20 | 2013-10-07 | 엘지전자 주식회사 | wiring integrated module and refrigerator having wiring structure using the module |
| JP2009264660A (en) * | 2008-04-24 | 2009-11-12 | Toshiba Corp | Refrigerator |
| WO2011138827A1 (en) * | 2010-05-06 | 2011-11-10 | トヨタ自動車株式会社 | Power source control system |
| JP5879533B2 (en) * | 2011-04-28 | 2016-03-08 | パナソニックＩｐマネジメント株式会社 | Outdoor unit and refrigeration equipment |
| JP2016205631A (en) * | 2015-04-15 | 2016-12-08 | 日立アプライアンス株式会社 | refrigerator |
| CN105276916A (en) * | 2015-11-11 | 2016-01-27 | 四川长虹电器股份有限公司 | Refrigerator control panel with power supply sections separated from control sections |
| CN206207846U (en) * | 2016-09-28 | 2017-05-31 | Tcl家用电器（合肥）有限公司 | Refrigerator |
| KR101880463B1 (en) * | 2016-12-21 | 2018-07-24 | 엘지전자 주식회사 | Air conditioner and Method for controlling it |
| CN208606471U (en) * | 2017-12-26 | 2019-03-15 | 广东奥马冰箱有限公司 | Temperature-control circuit, refrigerating plant and refrigerator |
-
2020
- 2020-03-03 CN CN202010973589.9A patent/CN112856898B/en active Active
- 2020-03-03 CN CN202010140938.9A patent/CN112856896B/en active Active
- 2020-03-03 CN CN202010973612.4A patent/CN112856899B/en active Active
- 2020-03-03 CN CN202010975449.5A patent/CN112856902A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN112856896A (en) | 2021-05-28 |
| CN112856898B (en) | 2022-07-05 |
| CN112856898A (en) | 2021-05-28 |
| CN112856899A (en) | 2021-05-28 |
| CN112856902A (en) | 2021-05-28 |
| CN112856899B (en) | 2022-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4829779A (en) | Interface adapter for interfacing a remote controller with commercial refrigeration and environmental control systems | |
| KR100534533B1 (en) | A refrigerating apparatus and an inverter device used therein | |
| EP2315985B1 (en) | Continuous compressor envelope protection in a refrigeration system | |
| WO2018140902A1 (en) | Motor drive system including removable bypass circuit and/or cooling features | |
| JP2007064542A (en) | Refrigeration apparatus and inverter device for use therein | |
| KR101316023B1 (en) | wiring integrated module and refrigerator having wiring structure using the module | |
| CN112856896B (en) | Refrigerator with a door | |
| JP4265558B2 (en) | Refrigeration apparatus and inverter apparatus used therefor | |
| US20170225585A1 (en) | Battery pack and power supply system for vehicle | |
| CN212029974U (en) | Refrigeration house system applying high-voltage electrostatic field preservation technology | |
| JP7305519B2 (en) | refrigerator | |
| JP7280807B2 (en) | refrigerator | |
| JP7304271B2 (en) | refrigerator | |
| JP4164554B2 (en) | Refrigeration apparatus and inverter apparatus used therefor | |
| JP2008175437A (en) | Refrigerator | |
| JP3051810B2 (en) | refrigerator | |
| JP2021076326A (en) | refrigerator | |
| JP4623220B2 (en) | Power circuit | |
| JPH10197129A (en) | Refrigerator | |
| JP6121290B2 (en) | Refrigeration equipment | |
| JP4155647B2 (en) | Cooling storage | |
| JPH07103644A (en) | Refrigerator | |
| US7610771B2 (en) | Refrigerating apparatus and refrigerator | |
| KR20050022857A (en) | Separated type air-conditioner | |
| CN110679051B (en) | Compressor driving device, control unit using the same, compressor unit, and cooler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |