CN110679051B - Compressor driving device, control unit using the same, compressor unit, and cooler - Google Patents
Compressor driving device, control unit using the same, compressor unit, and cooler Download PDFInfo
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- CN110679051B CN110679051B CN201880034611.4A CN201880034611A CN110679051B CN 110679051 B CN110679051 B CN 110679051B CN 201880034611 A CN201880034611 A CN 201880034611A CN 110679051 B CN110679051 B CN 110679051B
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- compressor
- circuit
- power supply
- compressor driving
- control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
Abstract
The compressor driving device 2 is provided with: a compressor driving circuit 9 for driving the compressor, a power supply circuit 8 for driving the compressor for supplying power from the ac power supply 1 to the compressor driving circuit; a control circuit 11 for controlling the compressor driving circuit; a control power supply circuit 10 for supplying power from an ac power supply to the control circuit; and an electromagnetic switch 7 that, in the event of overvoltage in the ac power supply, does not disconnect the electrical connection between the ac power supply and the control power supply circuit, but disconnects the electrical connection between the ac power supply and the compressor drive power supply circuit.
Description
Technical Field
The present invention relates to a compressor driving device, a control unit including the same, a compressor unit, and a cooler such as a refrigerator and an air conditioner.
Background
Generally, this type of compressor driving device is driven by alternating current as a power source. When the voltage of the AC power source fluctuates, an overvoltage may be applied to a configuration circuit of the compressor driving device. Therefore, a protection device that protects an inverter circuit (e.g., a configuration circuit) from overvoltage is known (see PTL 1, for example).
Fig. 5 shows a conventional inverter described in PTL 1. The protection device for the inverter circuit drives the motor 43 via the inverter circuit 42 by the three-phase AC power source 40. The electromagnetic switch 41 is provided between the three-phase AC power supply 40 and the inverter circuit 42 as a protection device that protects the inverter circuit 42 from overvoltage.
The inverter circuit 42 includes a rectifier 44 that rectifies three-phase ac to dc, a resistor 45 that smoothes dc, a smoothing capacitor 46, an inverter device 47 that converts dc to three-phase ac, and a control circuit 48 that controls the inverter device 47.
The control circuit 48 detects an overvoltage in the three-phase AC power supply 40 through voltage dividing resistors 50, 51 provided in the inverter circuit 42. When an overvoltage is detected, the control circuit 48 opens the electromagnetic switch 41 to block the connection between the inverter circuit 42 and the AC power source 40. This prevents overvoltage from being applied to the inverter circuit 42.
This structure can prevent overvoltage from being applied to the inverter circuit 42 even in the case of voltage fluctuation of the ac power supply. Thereby, damage to electronic components forming the inverter circuit 42 (for example, elements forming the smoothing capacitor 46 and the inverter device 47) can be prevented. This improves the reliability of the inverter circuit 42.
List of references
Patent literature
PTL 1：JP S60-190121A
Disclosure of Invention
Technical problem
In the above-described conventional configuration, the electromagnetic switch 41 is provided between the three-phase AC power supply 40 and the inverter circuit 42. When the voltage fluctuation of the power supply causes an overvoltage condition, the entire inverter circuit 42 (including the smoothing capacitor 46, the inverter device 47, and the control circuit 48) and the motor 43 are blocked from the AC power supply 40.
When the motor 43 is stopped, the operation of the entire inverter circuit 42 is stopped. Therefore, the cause of the stop of the motor 43 cannot be identified.
The electromagnetic switch 41 mechanically cuts off the power supply, causing a slight delay (about several tens of milliseconds) in the off operation of the electromagnetic switch 41 in response to the off signal from the control circuit 48. Accordingly, during the delay of the operation, an overvoltage is applied to the inverter circuit 42. Repeated application of an overvoltage due to a delay of only several tens of milliseconds in the turning-off operation of the electromagnetic switch 41 will damage the electronic components configuring the inverter circuit 42. This accumulation of damage will reduce the reliability and the lifetime of the inverter circuit.
The greater the number of times the electromagnetic switch 41 is opened and closed, the greater will be the cumulative effect of the overvoltage applied in several tens of milliseconds. The durability of the electronic components configuring the inverter circuit 42 is reduced, reducing the reliability and the service life of the inverter circuit 42.
When the inverter circuit is used in a country or region where voltage fluctuation is frequent, the voltage fluctuation has a great influence on the inverter circuit.
When the apparatus including the inverter circuit is, for example, a refrigerator, the apparatus is continuously powered on for use throughout the year. In this case, the electromagnetic switch 41 is frequently opened and closed due to the overvoltage, so that the influence of the overvoltage becomes considerable. This significantly affects the reliability and the lifetime of the device.
The present invention has been achieved in light of the above. An object of the present invention is to provide a compressor driving device that reduces application of an overvoltage to a configuration circuit and determines a cause of a stop of a compressor, a control unit including the compressor driving device, a compressor unit, and a cooler.
Solution to the problem
In order to achieve the above object, a compressor driving apparatus includes a compressor driving circuit that drives a compressor, a power supply circuit that supplies power from an AC power source to the compressor driving circuit for compressor driving, a control circuit that controls the compressor driving circuit, a control power supply circuit that supplies power from the AC power source to the control circuit, and an electromagnetic switch that blocks a power supply connection between the AC power source and the compressor without blocking an electrical connection between the AC power source and the control power supply circuit when an overvoltage is generated in the AC power source.
Advantageous effects of the invention
The present invention provides a compressor driving device, a control unit including the same, a compressor unit, and a cooler, which reduces the application of an overvoltage to a configuration circuit and determines the cause of a compressor stop.
Drawings
Fig. 1 is a block diagram showing a circuit configuration of a compressor driving device of embodiment 1 of the present invention.
Fig. 2 is a schematic explanatory view of a compressor unit of embodiment 2 of the present invention.
Fig. 3 is an explanatory view of a refrigerator of embodiment 3 of the present invention.
Fig. 4 is an explanatory view of a refrigerator of embodiment 4 of the present invention.
Fig. 5 is a circuit diagram of a conventional compressor driving apparatus.
Detailed Description
The compressor driving device according to the first invention includes a compressor driving circuit that drives a compressor, a power supply circuit for compressor driving that supplies power from an AC power supply to the compressor driving circuit, a control circuit that controls the compressor driving circuit, a control power supply circuit that supplies power from the AC power supply to the control circuit, and an electromagnetic switch that blocks an electrical connection between the AC power supply and the power supply circuit for compressor driving without blocking an electrical connection between the AC power supply and the control power supply circuit when an overvoltage is generated in the AC power supply. When the voltage fluctuation of the AC power supply is an overvoltage, the electromagnetic switch is operated to block the power supply to the power supply circuit for the compressor drive. Thereby, it is possible to prevent an overvoltage from being applied to a configuration circuit such as a power supply circuit for compressor driving. At the same time, power continues to be supplied to the control power supply circuit to maintain the operation of the control circuit. Thus, the control circuit can determine the cause of the compressor stop.
In the compressor driving device according to the second invention, when the compressor is not driven in the first invention, the electromagnetic switch may be turned off to block the electrical connection between the AC power source and the power source circuit for compressor driving.
Therefore, even when the AC power source is in an overvoltage state and the compressor is not driven, the electromagnetic switch has been turned off. This eliminates the need to turn off the electromagnetic switch each time an overvoltage occurs when the compressor is stopped. It is possible to significantly reduce the application of an overvoltage to a configuration circuit such as a power supply circuit for compressor driving due to an off delay of the electromagnetic switch. Accordingly, damage to elements forming a power supply circuit or the like for compressor driving caused by application of an overvoltage can be reduced, and reliability and service life of the compressor driving device and equipment such as a refrigerator including the same can be improved. In addition, since the driving of the electromagnetic switch can be stopped during the stop of the compressor, the power consumption for driving the electromagnetic switch can be suppressed, and the energy saving performance can be improved.
In the compressor driving device according to the third invention, in the first invention or the second invention, the control power supply circuit includes a rectifier diode for half-wave rectification, and the electromagnetic switch is a contact that opens and closes one of a pair of wires connected to the AC power supply. The rectifier diode may be connected to one wire.
When the electromagnetic switch is turned off to block the power supply circuit or the like for the compressor drive from the AC power supply, it is possible to prevent the power supply to the power supply circuit or the like for the compressor drive via the control power supply circuit. In other words, in a non-insulated circuit configuration in which the power supply circuit for compressor driving and the control power supply circuit are separated, it is possible to prevent electric power from being supplied to the power supply circuit for compressor driving or the like via the control power supply circuit. Accordingly, a compressor driving device having a power supply circuit for compressor driving and a control power supply circuit having a non-insulated circuit configuration can be provided at low cost.
In the compressor driving device according to the fourth invention, in the second or third invention, the power supply circuit for compressor driving includes a smoothing capacitor, and the electromagnetic switch may be closed for a predetermined time at each predetermined timing when the compressor is not driven. This makes it possible to maintain the charge of the smoothing capacitor of the power supply circuit for driving the compressor, which is connected to the downstream side of the electromagnetic switch. Therefore, when the electromagnetic switch is turned off during the stop of the compressor, the charge of the smoothing capacitor of the power supply circuit for the driving of the compressor can be prevented from discharging to nearly zero. When the electromagnetic switch is closed to drive the compressor, a large rush current is thus prevented from flowing through the electromagnetic switch. Therefore, damage of the electromagnetic switch caused by a large rush current can be significantly reduced, and the reliability and the service life of the compressor driving device can be further improved.
According to a compressor driving device of a fifth invention, in any one of the first to fourth inventions, a discharge diode may be further included, the discharge diode being arranged so that a current flows from a positive side terminal of a power supply circuit for compressor driving to a positive side terminal of a control power supply circuit. This can rapidly reduce the residual charge of the smoothing capacitor of the power supply circuit for compressor driving when the AC power supply is turned off. Therefore, defects due to residual charges can be prevented, and the safety of the compressor driving apparatus can be improved.
The control unit according to the sixth invention includes the compressor driving device of any one of the first to fifth inventions and a control box accommodating the compressor driving device. Thus, the compressor driving device is protected by the control box, and damage from external force or the like can be prevented. Therefore, the compressor driving device is easy to operate and use while being attached to a component such as a compressor, with higher convenience.
The compressor unit according to the seventh invention is integrally constructed of the control unit of the sixth invention and the compressor. Accordingly, a compressor unit having a compressor drive control circuit that can be easily mounted on various coolers can be provided.
The cooler according to the eighth invention includes the compressor driving device of any one of the first to fifth inventions, the control unit of the sixth invention, or the compressor unit of the seventh invention. Therefore, the cooler manufacturer does not need to design a complicated compressor driving circuit, and can easily provide a cooler.
Embodiments of the present invention will now be described with reference to the accompanying drawings. The present invention is not limited by these examples.
Example 1
Fig. 1 is a block diagram showing a circuit configuration of a compressor driving device of embodiment 1 of the present invention.
In fig. 1, reference numeral 1 denotes an AC power supply. Reference numeral 2 denotes a compressor driving device connected to an AC power source 1 via a connector 3. Reference numeral 4 denotes a motor of the compressor driven by the compressor driving device 2. Hereinafter, the side close to the AC power source 1 may be referred to as an upstream side, and the side away from the AC power source 1 may be referred to as a downstream side.
In the present embodiment, the compressor driving device 2 is configured by the following circuit elements integrally provided on one printed circuit board. Hereinafter, this configuration will be described. The circuit elements are electrically connected to each other through wiring on the circuit board.
The electromagnetic switch 7 is closed to connect the wiring between the AC power source 1 and the power source circuit 8 for compressor driving, and the electromagnetic switch 7 is opened to cut off (block) the connection. When an overvoltage is applied, the electromagnetic switch 7 cuts off the electrical connection between the AC power supply 1 and the power supply circuit 8 for compressor driving. The overvoltage is, for example, a rated voltage of the compressor driving device 2 or more, which may damage components of the compressor driving device 2.
The control circuit 11 controls the driving of the compressor driving circuit 9. Further, when an overvoltage of the AC power supply 1 is detected, the control circuit 11 turns off the electromagnetic switch 7 to block current input (power supply) from the AC power supply 1 to the power supply circuit 8 for compressor driving, the compressor driving circuit 9, and the motor 4.
Further, when the compressor does not need to be driven or is not driven, the control circuit 11 performs control to turn off the electromagnetic switch 7. When the compressor is not driven, the control circuit 11 performs control to close the electromagnetic switch 7 at predetermined time intervals (at predetermined timings), and then repeatedly open the electromagnetic switch 7 after a predetermined time elapses. However, when the electromagnetic switch 7 is opened due to overvoltage, the control circuit 11 does not perform control to close the electromagnetic switch 7.
"when it is not necessary to drive the compressor", as described above, means "when a specific condition with respect to the compressor is satisfied". For example, this refers to a case where the cooler including the compressor driving device 2 is a refrigerator and the temperature of the storage chamber of the refrigerator has reached a predetermined temperature and cooling is no longer required. In this case, the motor 4 of the compressor is not driven but stopped.
Here, the control power supply circuit 10 is branched from the wiring on the upstream side of the electromagnetic switch 7 (i.e., between the ac power supply 1 and the electromagnetic switch 7). Therefore, regardless of whether the electromagnetic switch 7 is open or closed, electric power is always supplied from the AC power supply 1 to the control power supply circuit 10. In other words, the electromagnetic switch 7 controls the supply of electric power to the power supply circuit 8 for compressor driving, and does not control the supply of electric power to the control power supply circuit 10. The electromagnetic switch 7 is provided as a contact that opens and closes only one wire (one wire) of a pair of wires (leads) connected to the AC power supply 1.
Further, the power supply circuit 8 for compressor driving includes a full-wave rectifying circuit 12 and a smoothing capacitor 13. The full-wave rectifying circuit 12 rectifies the ac supplied via the noise filter 6 into dc. The smoothing capacitor 13 smoothes the dc current full-wave rectified by the full-wave rectifying circuit 12. The compressor driving circuit 9 is configured as a switching circuit or the like including a semiconductor element.
The control power supply circuit 10 further includes a half-wave rectification circuit portion 16, a voltage division circuit portion 17, a first power supply portion 19, a second power supply portion 21, and a third power supply portion 22. The half-wave rectification circuit section 16 includes a rectification diode 14 for half-wave rectification and a capacitor 15. The voltage dividing circuit 17 detects an overvoltage. The first power supply section 19 drives the microcomputer 18 that controls the control circuit 11. The second power supply section 21 drives the drive control section 20 of the compressor drive circuit 9. The third power supply section 22 drives the electromagnetic switch 7.
The compressor drive circuit 9 and the drive control section 20 are integrally constructed of semiconductor elements such as an Intelligent Power Module (IPM) 25.
The rectifier diode 14 of the half-wave rectifier circuit portion 16 is connected to one line provided with the electromagnetic switch 7. The rectifying diode 14 is configured in parallel with the electromagnetic switch 7 and the full-wave rectifying circuit 12 of the power supply circuit 8 for compressor driving.
In addition, a discharge diode 23 is arranged between the power supply circuit 8 for compressor driving and the control power supply circuit 10 so that current flows only from the positive side terminal of the power supply circuit 8 for compressor driving to the positive side terminal of the control power supply circuit 10.
The operation and function of the compressor driving device 2 constructed as described above will now be described.
Typically, the electromagnetic switch 7 is closed. Thereby, power is supplied from the AC power supply 1 to the power supply circuit 8 for compressor driving, the compressor driving circuit 9, the motor 4, the control power supply circuit 10, and the control circuit 11.
The driving of the motor 4 is controlled by the compressor driving circuit 9 in accordance with a signal from the control circuit 11.
In this state, when the voltage fluctuation of the AC power supply 1 is an overvoltage, the control circuit 11 detects the overvoltage via the voltage dividing circuit section 17 of the control power supply circuit 10. The control circuit 11 then drives the electromagnetic switch 7 via the third power supply section 22, and opens the electromagnetic switch 7 to block the AC power supply 1 from the power supply circuit 8 for compressor driving. As a result, overvoltage is prevented from being applied to the power supply circuit 8 for compressor driving, the compressor driving circuit 9, and the motor 4. Therefore, damage to elements and the like of each circuit due to the application of the overvoltage is prevented.
Here, the control power supply circuit 10 is branched from the wiring on the upstream side of the electromagnetic switch 7 (i.e., between the AC power supply 1 and the electromagnetic switch 7). Accordingly, the electromagnetic switch 7 stops the power supply to the circuit element located on the side of the power supply circuit 8 for compressor driving with respect to the electromagnetic switch 7, and stops the power supply to the motor 4 of the compressor. Therefore, the power supply to the circuit element on the control power supply circuit 10 side with respect to the electromagnetic switch 7 is not cut off. Thus, the control circuit 11 continues to be energized after the electromagnetic switch 7 is turned off. Therefore, when the compressor is stopped due to the overvoltage, the control circuit 11 determines the overvoltage as a cause of the stop of the compressor, for example, and may indicate the cause. Thus significantly enhancing convenience.
The withstand rated voltage of the control power supply circuit 10, the rectifying diode 14, and the capacitor 15 is sufficiently higher than the overvoltage of the AC power supply 1. The smoothing capacitor 13 has a higher current consumption value and a much larger capacitance than the capacitor 15. Thus, a smoothing capacitor 13 with a higher withstand voltage rating will result in a larger size and higher cost. However, the capacitor 15 has relatively low current consumption in the downstream circuit element and has a small capacitance. Therefore, it is relatively easy to select a capacitor having a high withstand voltage rating for the capacitor 15.
Further, in the compressor driving device 2 of the present embodiment, when the motor 4 of the compressor is not driven, the electromagnetic switch 7 is turned off to block the connection of the power supply circuit 8 for compressor driving with the AC power supply 1. For example, when the compressor driving apparatus 2 is used for a refrigerator and the temperature of the freezing chamber is sufficiently low, it is not necessary to drive the compressor, and the motor 4 of the compressor is stopped. At this time, the control power supply circuit 10 performs control to turn off the electromagnetic switch 7, and the connection between the motor 4 and the AC power supply 1 is blocked.
Therefore, when the compressor is not driven and the voltage of the AC power supply 1 fluctuates to an overvoltage, the overvoltage is prevented from being applied to the circuit element on the downstream side of the electromagnetic switch 7 because the electromagnetic switch 7 has been turned off. The electromagnetic switch 7 therefore does not need to be opened each time an overvoltage occurs during the stop of the compressor.
Accordingly, it is possible to significantly reduce the application of an overvoltage to a circuit element such as the power supply circuit 8 for compressor driving due to the off delay of the electromagnetic switch 7.
This can reduce the accumulation of damage due to the application of an overvoltage to elements forming the power supply circuit 8 and the like for compressor driving in the compressor driving device 2. Accordingly, the reliability and the service life of the compressor driving device 2 and the apparatus including the compressor driving device, such as a refrigerator, can be significantly improved.
Further, the driving of the electromagnetic switch 7 may be stopped during the stop of the compressor. Therefore, the power consumption for driving the electromagnetic switch 7 can be suppressed, and the energy saving performance can also be improved.
When the compressor is not required to be driven and the electromagnetic switch 7 is turned off, the smoothing capacitor 13 of the power supply circuit 8 for compressor driving is slowly discharged, and the charge of the smoothing capacitor 13 becomes zero or near zero. Then, in the case where the charge of the smoothing capacitor 13 becomes close to zero, when the opened electromagnetic switch 7 is closed, a large rush current flows through the electromagnetic switch 7, and the electromagnetic switch 7 may be significantly damaged.
However, in the compressor driving device 2 of the present embodiment, when the compressor is stopped, the electromagnetic switch 7 is closed for a predetermined time (for example, one second) every predetermined time interval (for example, 20 minutes) and then opened. By repeatedly opening and closing the electromagnetic switch 7, the charge of the smoothing capacitor 13 connected to the downstream side of the electromagnetic switch 7 is allowed to be maintained at a predetermined amount or more.
In other words, during the stop of the compressor, the charge of the smoothing capacitor 13 is not discharged to nearly zero. When the electromagnetic switch 7 is closed to drive the compressor, a large rush current is thus prevented from flowing through the electromagnetic switch 7. Therefore, damage of the electromagnetic switch 7 caused by a large rush current can be significantly reduced, and the reliability and the service life of the compressor driving device 2 can be further improved.
Note that the time interval and the duration when the electromagnetic switch 7 is closed during the stop of the compressor are predetermined, but they are not limited to the predetermined values. The time interval and the duration may be arbitrarily set as long as a predetermined amount of charge is accumulated and maintained in the smoothing capacitor 13.
The compressor driving device 2 branches a line near the power supply circuit 8 for driving the compressor and a line near the control power supply circuit 10. The control power supply circuit 10 is configured as a half-wave rectification circuit. The electromagnetic switch 7 is provided to open and close contacts of only one line of the AC power supply 1. A rectifier diode 14 for controlling half-wave rectification of the power supply circuit 10 is connected to one line of the AC power supply 1 connected to the electromagnetic switch 7.
Therefore, when the electromagnetic switch 7 is turned off to block the connection of the power supply circuit 8 for compressor driving and the like with the AC power supply 1, the power supply from the AC power supply 1 to the power supply circuit 8 for compressor driving and the like via the control power supply circuit 10 is prevented. In other words, in the non-insulating circuit configuration in which the power supply circuit 8 for compressor driving and the control power supply circuit 10 are separated, it is possible to prevent power from being supplied to the power supply circuit 8 for compressor driving or the like via the control power supply circuit 10.
Therefore, the power supply circuit 8 for compressor driving and the control power supply circuit 10 having the non-insulating circuit configuration can be provided at low cost.
The circuit parts for driving the compressor (i.e., the power supply circuit 8 for compressor driving, the compressor driving circuit 9, the control power supply circuit 10, the control circuit 11, and the electromagnetic switch 7) can be easily integrally provided on one printed circuit board.
Further, in the compressor driving device 2 of the present embodiment, the discharge diode 23 is provided such that current flows only from the positive side terminal of the power supply circuit 8 for compressor driving to the positive side terminal of the control power supply circuit 10.
This enables to rapidly reduce the residual charge of the smoothing capacitor 13 of the power supply circuit 8 for compressor driving via the control power supply circuit 10, for example, in the case of turning off the AC power supply 1 for maintenance. Therefore, the safety of the compressor driving device 2 can be improved.
Example 2
Fig. 2 is a schematic explanatory view of a compressor unit 28 including the compressor driving apparatus 2 according to embodiment 1.
The compressor unit 28 of embodiment 2 includes the compressor 24. The attachment legs (not shown) for the control unit 27 are attached to brackets (not shown) welded to the outside of the compressor 24. Thus, the compressor unit 28 comprises an integrated compressor 24 and control unit 27. The control unit 27 includes a control box 26, and the compressor driving device 2 is built in the control box 26.
The above integration means a combined arrangement of the compressor 24 and the control unit 27, i.e. the compressor drive 2. Thus, the compressor unit 28 is integrally configured by the compressor 24 and the control unit 27.
The above configuration may provide compressor control circuitry for the compressor unit 28 that may be used for general purposes. That is, the compressor unit 28 that can be easily mounted on various coolers can be provided.
The compressor unit 28 further comprises a compressor drive 2. Therefore, in the compressor unit 28, it is possible to reduce the application of an overvoltage to the configuration circuit of the power supply circuit 8 for compressor driving, such as the compressor driving device 2, and to determine the cause of the compressor stop.
Example 3
Fig. 3 is an explanatory diagram of a refrigerator including the compressor unit 28 according to embodiment 2. As shown in fig. 3, the refrigerator according to embodiment 3 includes a refrigerator main body 29. A main body control unit 30 is provided on the back surface of the refrigerator main body 29, and a compressor unit 28 is provided in a machine room in the lower portion of the refrigerator main body 29. The microcomputer 18 (fig. 1) of the control circuit 11 of the compressor driving device 2 of the compressor unit 28 is connected to the main body control portion 30 of the refrigerator main body 29 via a wire 31.
The refrigerator constructed as above can be easily constructed such that the control unit 27 (i.e., the compressor driving device 2) is installed in the refrigerator main body 29 later, and the control circuit 11 of the compressor driving device 2 is connected to the main body control part 30. Accordingly, the refrigerator manufacturer does not need to design a complicated compressor driving circuit like a compressor driving control circuit (e.g., an inverter control circuit), and can easily manufacture a refrigerator having an inverter-driven controllable compressor driving device.
Example 4
Fig. 4 is an explanatory view showing another refrigerator in which the compressor driving device 2 of embodiment 1 is directly mounted.
As shown in fig. 4, the refrigerator according to embodiment 4 includes a refrigerator main body 29. The compressor driving device 2 is provided as a printed circuit board at an upper portion of a rear surface of the refrigerator main body 29. The compressor driving device 2 is provided near the main body control unit 30, and is connected to the main body control unit 30 via a wire 31. The compressor 24 is disposed at a lower portion of the refrigerator main body 29, and is connected to the compressor driving device 2 via a wire 31. In this configuration, the refrigerator according to embodiment 4 has similar effects to the refrigerator according to embodiment 3. Further, the refrigerator according to embodiment 4 is expected to have the effects described below.
For example, when the refrigerator is used in an area or country where flooding occurs frequently due to flooding (i.e., a country located in a tropical region), water is better prevented from entering the compressor driving device 2. It is possible to prevent the compressor driving device 2 from malfunctioning due to water. In addition, in any region where the refrigerator is used, the influence of heat from the compressor 24 on the compressor driving device 2 can be reduced, and the reliability of the compressor driving device 2 can be prevented from being lowered.
In embodiment 4, the compressor driving device 2 is directly mounted on the refrigerator main body 29 in the vicinity of the main body control part 30. Alternatively, the compressor driving device 2 may be configured in the same manner as the control unit 27 according to embodiment 2 and mounted on the refrigerator main body 29. The position where the compressor driving device 2 is mounted on the refrigerator main body 29 is not limited to the vicinity of the main body control part 30.
In embodiment 3 and embodiment 4, the refrigerator is described as a cooler, but is not limited to a cooler. For example, the cooler may be an air conditioner, a vending machine, a showcase, or a commercial refrigerator. Any chiller that includes a compressor provides a similar effect.
Although the compressor driving device, the control unit including the compressor driving device, the compressor unit, and the cooler according to the present invention have been described using the embodiments, the present invention is not limited to these embodiments. The embodiments disclosed herein are illustrative and not restrictive. The scope of the invention is indicated by the scope of the claims and includes meanings equivalent to the scope of the claims and any modifications within the scope of the claims.
Industrial applicability
As described above, the present invention provides a compressor driving device capable of reducing the application of an overvoltage to a configuration circuit of the compressor driving device and determining the cause of the stop of a compressor, a control unit including the same, a compressor unit, and a cooler. Accordingly, the present invention can be widely used as a compressor driving device for a refrigerator, an air conditioner, a vending machine, and another cooler including a compressor.
List of reference numerals
1AC power supply
2. Compressor driving device
3. Connector with a plurality of connectors
4. Motor with a motor housing having a motor housing with a motor housing
6. Noise filter
7. Electromagnetic switch
8. Power supply circuit for compressor drive
9. Compressor driving circuit
10. Control power supply circuit
11. Control circuit
12. Full wave rectifying circuit
13. Smoothing capacitor
14. Rectifying diode
15. Capacitor with a capacitor body
16. Half-wave rectifying circuit part
17. Voltage dividing circuit part
18. Microcomputer
19. A first power supply part
20. Drive control unit
21. A second power supply part
22. Third power supply part
23. Discharge diode
24. Compressor with a compressor body having a rotor with a rotor shaft
25 IPM
26. Control unit
27. Control circuit
28. Compressor unit
29. Refrigerator main body
30. Main body control part
31. Conducting wire
Claims (6)
1. A compressor driving apparatus comprising:
a compressor driving circuit which drives the compressor;
a power supply circuit for compressor drive that supplies power from an ac power source to the compressor drive circuit, the power supply circuit for compressor drive comprising a capacitor;
a control circuit for controlling the compressor driving circuit;
a control power supply circuit that supplies power from the alternating current power supply to the control circuit; and
an electromagnetic switch that blocks an electrical connection between the AC power source and the power source circuit for compressor driving without blocking an electrical connection between the AC power source and the control power source circuit when an overvoltage is generated in the AC power source,
wherein the electromagnetic switch is opened to block an electrical connection between the alternating current power source and the power source circuit for compressor driving when the compressor is not driven, and the electromagnetic switch is repeatedly closed for a predetermined time at each predetermined timing so as to maintain the charge on the capacitor at or above a predetermined amount.
2. The compressor driving device according to claim 1, wherein the control power supply circuit includes a rectifier diode for half-wave rectification,
the electromagnetic switch is a contact for opening and closing one wire of a pair of wires connected to the AC power source, an
The rectifier diode is connected to the one wire.
3. The compressor driving apparatus according to any one of claims 1 to 2, further comprising a discharge diode arranged so that a current flows from a positive side terminal of the power supply circuit for compressor driving to a positive side terminal of the control power supply circuit.
4. A control unit comprising:
a compressor driving apparatus according to any one of claims 1 to 3; and
and a control box for the compressor driving device is arranged in the control box.
5. A compressor unit integrally configured by the control unit of claim 4 and the compressor.
6. A cooler, comprising:
a compressor driving apparatus according to any one of claims 1 to 3;
the control unit of claim 4; or (b)
The compressor unit of claim 5.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-103965 | 2017-05-25 | ||
| JP2017103965 | 2017-05-25 | ||
| PCT/JP2018/019494 WO2018216655A1 (en) | 2017-05-25 | 2018-05-21 | Compressor driving device, control unit using same, compressor unit, and cooler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110679051A CN110679051A (en) | 2020-01-10 |
| CN110679051B true CN110679051B (en) | 2023-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880034611.4A Active CN110679051B (en) | 2017-05-25 | 2018-05-21 | Compressor driving device, control unit using the same, compressor unit, and cooler |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN110679051B (en) |
| PH (1) | PH12019502399A1 (en) |
| WO (1) | WO2018216655A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102918758A (en) * | 2010-05-28 | 2013-02-06 | 三菱电机株式会社 | Power conversion device |
| CN104081657A (en) * | 2012-02-08 | 2014-10-01 | 大金工业株式会社 | Power supply control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0879963A (en) * | 1994-09-06 | 1996-03-22 | Daikin Ind Ltd | Fault diagnostic device in power conversion control device |
| JP4151188B2 (en) * | 2000-02-29 | 2008-09-17 | 松下電器産業株式会社 | Multi-type air conditioner control device |
| JP4043481B2 (en) * | 2004-06-25 | 2008-02-06 | 三洋電機株式会社 | Inverter device |
| CN102343782A (en) * | 2011-07-15 | 2012-02-08 | 重庆松芝汽车空调有限公司 | Electric automobile air conditioning direct current high-voltage circuit with pre-charging function |
| CN102269464B (en) * | 2011-08-22 | 2014-01-29 | 四川长虹电器股份有限公司 | Delayed protection method for air conditioner |
| JP5482840B2 (en) * | 2012-07-23 | 2014-05-07 | ダイキン工業株式会社 | Power supply |
| JP6236295B2 (en) * | 2013-11-14 | 2017-11-22 | ローム株式会社 | AC / DC converter protection circuit, power adapter and electronic device |
| WO2016194197A1 (en) * | 2015-06-04 | 2016-12-08 | 三菱電機株式会社 | Power conversion device |
| CN105515415A (en) * | 2015-12-25 | 2016-04-20 | 美的集团武汉制冷设备有限公司 | Power conversion circuit, power conversion method and air conditioner |
| JP2018057178A (en) * | 2016-09-29 | 2018-04-05 | 日立工機株式会社 | Electrical apparatus |
-
2018
- 2018-05-21 WO PCT/JP2018/019494 patent/WO2018216655A1/en active Application Filing
- 2018-05-21 CN CN201880034611.4A patent/CN110679051B/en active Active
-
2019
- 2019-10-23 PH PH12019502399A patent/PH12019502399A1/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102918758A (en) * | 2010-05-28 | 2013-02-06 | 三菱电机株式会社 | Power conversion device |
| CN104081657A (en) * | 2012-02-08 | 2014-10-01 | 大金工业株式会社 | Power supply control device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018216655A1 (en) | 2018-11-29 |
| CN110679051A (en) | 2020-01-10 |
| PH12019502399A1 (en) | 2020-12-07 |
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