TW201306783A - Dishwasher - Google Patents

Abstract

A dishwasher, comprising a washing tank (2) for accommodating items to be washed, and a heating unit (8) for heating washing water and heating external air taken in during a drying step, the heating unit being provided inside the washing tank (2). The dishwasher also comprises: a temperature detector (14) for detecting the temperature of the washing water and the external air temperature, the temperature detector being provided touching the outer side of the bottom part of the washing tank (2); and a controller (15) for controlling operation on the basis of the detection results of the temperature detector (14). The temperature detector (14) detects the external air temperature at the start of operation, and when the controller (15) has determined that the external air temperature detected by the temperature detector (14) is higher than a first predetermined temperature, the controller performs control for reducing the amount of heat supplied to the heating unit (8) during the drying step to be less than usual.

Description

Tableware washing and drying machine Field of invention

The present invention relates to a dish washing and drying machine which washes washed water such as tableware and the like by washing the washing water.

Background of the invention

Fig. 4 is a side elevational internal view showing a conventional dishwashing and drying machine 100.

The dish washing and drying machine 100 includes a washing tank 121, a communicating portion 121a provided in a lower portion of the rear portion of the washing tank 121, an intake duct 122 connected to the communicating portion 121a, and a fan box 123, which is sucked and sucked. The air duct 122 is connected.

A motor 124 is attached to the fan case 123, and a blower fan 125 directly coupled to the motor 124 is provided inside the fan case 123. In order to allow outside air to be taken into the cleaning tank 121, an opening toward the outside air is formed in the fan case 123.

Further, a heater 126 is provided as a heat source in the lower portion of the cleaning tank 121, and an opening portion 127a facing the outside air is provided on the upper portion of the lid body 127 on the front surface of the covering product.

The dish washing and drying machine 100 is in a drying process for drying the dish 128, energizes the heater 126, raises the temperature of the air in the washing tank 121, and energizes the motor 124 to operate the blower fan 125. The outside air is sent to the cleaning tank 121 through the intake duct 122 and the communication portion 121a.

Thereby, the water vapor generated in the cleaning tank 121 can be forcibly exhausted from the opening 127a to the outside of the machine, and the inside of the dish 128 and the washing tank 121 can be dried.

In the drying process, the control unit performs a predetermined operation. The time of the drying process is set in advance as a product, or the user sets it by operating a timer.

However, in the dish washing and drying machine 100, since the outside air is taken into the washing tank 121 by the blower fan 125 in the drying process, the temperature of the air in the washing tank 121 is easily affected by the temperature of the outside air. In particular, when the outside air temperature is low, since the temperature of the air in the cleaning tank 121 is also lowered, there is a possibility that the drying of the dish 128 is insufficient in the predetermined drying time. Conversely, when the outside air temperature is high, there is a possibility that the tableware 128 is excessively dried and wastes time and energy.

In order to solve this problem, there has been disclosed a technique for measuring the temperature change ΔT of the air in the cleaning tank 121 having an average unit time Δt after the start of the drying process, and determining the outside air temperature based on the value. State. In this technique, the state of the outside air temperature determined based on the value of the temperature change ΔT is controlled, and the drying time is controlled or the energization ratio of the heater 126 is controlled (for example, refer to Patent Document 1).

In the above-described conventional technique, the direct external air temperature is not detected, and the temperature change ΔT in the cleaning tank 121 from the drying process determines the state of the outside air temperature. Therefore, for example, when the air volume is lowered due to a change in the state of the blower fan 125, the motor 124, or the air supply path, since the temperature change ΔT in the cleaning tank 121 is reduced, it is determined that the outside air temperature is in a high temperature state. . Accordingly, in the prior art, there is a misjudgment of the outside air temperature.

Further, in the above technique, in order to measure the temperature of the air in the washing tank 121 The temperature detecting element 129 is disposed in the cleaning tank 121 with an opening. In particular, when the temperature of the air and the washing water in the washing tank 121 is measured by one temperature detecting element, an opening is formed in the bottom wall of the washing tank 121, and the temperature detecting element 129 is disposed. At this time, since the opening is exposed to the washing water in the washing process or the like, there is a possibility of water leakage. Therefore, in order to prevent water leakage for a long period of time, it is necessary to strictly seal the opening.

Advanced technical literature Patent literature

[Patent Document 1] Japanese Patent Laid-Open Publication No. SHO 64-37924

Summary of invention

The invention provides a dish washing and drying machine, which can correctly detect the temperature of the outside air without leaking water, and clean the tank according to the state of taking in the temperature of the outside air in the washing tank. The control of the air inside is most appropriate, and the energy saving of the drying process is achieved.

The dish washing and drying machine according to the present invention includes: a washing tank for storing the object to be washed; and a heating unit installed in the washing tank to heat the washing water and heating the outside of the drying process. The air detecting unit is disposed in contact with the outer side of the bottom of the washing tank, and detects the temperature of the washing water and the outside air temperature; and the control unit controls the operation of the heating unit according to the detection result of the temperature detecting unit. By. Further, the temperature detecting unit detects the temperature of the outside air at the start of the operation, and when the control unit determines that the temperature of the outside air detected by the temperature detecting unit is higher than the first predetermined temperature, the drying process is reduced as compared with usual. The control of the input heat of the heating department of China and North Korea.

With such a configuration, the correct outside air temperature can be detected, and the most appropriate heating control according to the outside air temperature can be performed to achieve energy saving in the drying process. Further, since the temperature detecting portion is provided in contact with the outer side of the washing tank, since it is not necessary to provide the opening portion in the washing tank, it is possible to provide a dish washing and drying machine without water leakage.

Simple illustration

Fig. 1 is a side sectional view showing the internal structure of the dish washing and drying machine in the embodiment of the present invention.

Fig. 2A is a graph showing changes in temperature inside the washing tank of each operation program in the dish washing and drying machine according to the embodiment of the present invention.

Fig. 2B is a view showing an operation state of each component of each operation program in the dish washing and drying machine according to the embodiment of the present invention.

Fig. 3 is a flow chart for explaining the condition setting of the dish washing and drying machine in the embodiment of the present invention.

Fig. 4 is a side view showing the internal configuration of a conventional dishwashing and drying machine.

Form for implementing the invention

Hereinafter, embodiments of the present invention will be described. Further, the present invention is not limited to the embodiment.

The dish washing and drying machine 50 in the embodiment of the present invention will be described.

Fig. 1 is a side sectional view showing the internal structure of the dish washing and drying machine 50 in the embodiment of the present invention. Fig. 2A is a graph showing temperature changes inside the washing tank 2 of each operation program in the dish washing and drying machine 50. Fig. 2B shows each part of each operation program in the dishwasher washing and drying machine 50. Operating chart.

The dish washing and drying machine 50 is provided with a carcass 1 on the front side, and has a washing tank 2 inside. The dish washing and drying machine 50 is provided with a water supply valve 3 that supplies water or hot water to the washing tank 2. A water storage portion 4 is provided at the bottom of the washing tank 2.

The dish washing and drying machine 50 is provided with a washing pump 5, and the washing pump 5 is in communication with the water storage unit 4, and is driven by the washing motor 5a. A washing nozzle 7 is provided at the bottom of the washing tank 2. By the washing pump 5, the washing water is pressure-fed to the washing nozzle 7, and is sprayed to the entire inside of the washing tank 2.

A vegetable residue filter 6 for collecting vegetable waste is attached to the water storage unit 4. The washing water supplied to the washing tank 2 is sucked by the washing pump 5 through the vegetable drain filter 6 and the water storage unit 4, and is supplied from the washing pump 5 to the washing nozzle 7. The washing water sprayed from the washing nozzle 7 is returned to the water storage unit 4 after washing the tableware 9 belonging to the object to be washed, and is circulated by this path.

The vegetable residue or the like washed out from the tableware 9 flows into the vegetable residue filter 6 together with the washing water, and the vegetable waste which cannot pass through the size of the vegetable residue filter 6 is collected to the vegetable residue filter 6.

A heater 8 belonging to a heating portion such as washing water is provided between the washing nozzle 7 and the bottom of the washing tank 2, and the heater 8 heats the washing water to about 50 °C during washing. A tableware cage 10 is provided above the washing nozzle 7, and the tableware 10 can be arranged with the tableware 9 neatly arranged, and the washing water can be effectively sprayed to the tableware 9 while being efficiently washed. Moreover, the drain pump 11 driven by the drain motor 11a discharges the washing water to the outside of the machine via the drain hose 12.

On the outer side of the bottom of the cleaning tank 2, heat sensitive to the temperature detecting portion is disposed. The resistor 14 is used for detecting both the outside air temperature and the temperature of the washing water. The dish washing and drying machine 50 includes a control unit 15, and the control unit 15 controls the operation of the dish washing and drying machine 50 based on the detection result of the thermistor 14. The thermistor 14 is disposed in a state in which it is connected to the outer side of the cleaning tank 2, and the temperature of the outside air or the temperature of the washing water can be indirectly detected by timing.

Before the water supply to the washing water, the temperature of the wall surface of the washing tank 2 is the same as the temperature of the outside air, and therefore, the thermistor 14 can indirectly detect the outside air temperature indirectly. On the other hand, in the respective procedures such as the washing process, in the state where the washing water has supplied the water to the washing tank 2, the temperature of the wall surface of the washing tank 2 is substantially the same as that of the washing water, so that it can be indirectly Correctly detect the temperature of the washing water. According to this configuration, since it is not necessary to provide the opening portion in the cleaning tank 2 and the thermistor 14 is attached, it is not necessary to perform an unnecessary sealing treatment, and a structure without water leakage can be realized.

The heat input to the heater 8 in the drying program or the like is in the on-off control of the heater 8, and is adjusted by adjusting the time of opening and closing (refer to FIG. 2B).

In the present specification, the liquid to be washed and washed by the washed matter such as the tableware 9 stored in the washing tank 2 is used as the washing water.

As shown in Figs. 2A and 2B, the dish washing and drying machine 50 performs a washing process for removing the stain adhering to the tableware 9, and cleans the lotion components and the like adhering to the tableware 9 by a clean washing. The washing procedure for the clean water washing was performed once to three times (two times in the examples of Figs. 2A and 2B).

In addition, in the washing process, after the water supply procedure, the water supply valve 3 will constitute a shutoff In the closed state, the washing pump 5 and the heater 8 constitute an open state, and the washing water is sprayed. The blower fan 13 and the drain pump 11 are kept in a closed state. In the washing process, the temperature inside the washing tank 2 rises. Immediately before the end of the washing process, the washing pump 5 and the heater 8 are in a closed state, and the drain pump 11 is configured to be in an open state to discharge the washing water.

In the washing process, the water supply valve 3 is configured to be in an open state, and after the washing water is supplied, the washing pump 5 is configured to be in an open state, and the washing water is sprayed, and then the drain pump 11 is configured to be in an open state, and the washing water is washed. Will drain. Moreover, these actions (water supply, washing, and drainage) are the number of times of repeated washing. In the meantime, the heater 8 and the blower fan 13 are maintained in a closed state. In the washing process, the temperature inside the washing tank 2 is gradually lowered.

After the washing process, in order to carry out the final processing of the dishes 9 in a hygienic manner, a washing and washing procedure for washing the dishes 9 by means of clean washing water which has been heated to 60 ° C to 80 ° C is carried out. In the heating and washing process, the water supply valve 3 is configured to be in an open state, and after the washing water is supplied, the washing pump 5 and the heater 8 are configured to be in an open state, and the washing water is sprayed. The drain pump 11 and the blower fan 13 are kept in a closed state. Thereby, the temperature inside the washing tank 2 rises to the heating washing temperature T3.

Immediately before the heating process is heated, the washing pump 5 and the heater 8 are in a closed state, and the drain pump 11 is configured to be in an open state to discharge the washing water.

Then, a drying process for drying the washed tableware 9 is performed. In the drying process, the blower fan 13 provided in the lower portion of the washing tank 2 is configured to be in an open state, whereby the outside air is taken into the washing tank 2. The external air is intermittently constituted by the heater 8 using the on-off control to open the state. heating. The heated air flows between the dishes 9 by the blower fan 13, whereby the water droplets adhering to the tableware 9 are dried. Further, in the drying process, the water supply valve 3, the washing pump 5, and the drain pump 11 are closed. In the drying process, the temperature inside the washing tank 2 is lowered from the heating washing temperature T3.

The operation and action of the above-described dish washing and drying machine 50 will be described. The dish washing and drying machine 50 indirectly detects the outside air temperature by the thermistor 14 before starting the operation thereof, before the water supply program for supplying the washing water into the washing tank 2. Then, the above washing procedure, washing procedure, heating washing procedure, and drying procedure are performed.

In the drying process, as described above, the outside air is taken into the washing tank 2 by the blower fan 13 provided at the lower portion of the washing tank 2, and is heated by the heater 8. Further, the water that has been heated is passed through the tableware 9 to dry the water droplets adhering to the tableware 9.

At this time, the control unit 15 controls the amount of heat input to the heater 8 based on the temperature detected by the thermistor 14. For example, when the outside air temperature is high, the tableware 9 can be sufficiently dried even if the heat of the outside air in the taken-in cleaning tank 2 is reduced. By performing such control, the amount of heat input to the heater 8 in the drying process can be reduced.

For example, a standard outside air temperature is set to a first predetermined temperature T1 (for example, 25 ° C), and heat necessary for drying the dishes by air at 25 ° C is set in advance to standard heat. Further, when the detected outside air temperature is 25 ° C or more, the amount of heat to be heated by the taken-in outside air is reduced as compared with the preset standard heat. Thereby, energy saving can be achieved.

Furthermore, the heat control when the outside air temperature is greater than the first predetermined temperature T1 The system is set in accordance with the detected outside air temperature, whereby energy saving can be achieved more delicately. Thereby, the following dish washing and drying machine 50 can be provided, that is, the heat of the external air heated by the heater 8 can be optimally adjusted according to the outside air temperature, and the energy saving of the drying process can be achieved.

Here, in order to wash and dry a large number of tablewares 9, it is assumed that the user continuously operates. At this time, the wall surface of the washing tank 2 in the second and subsequent washing procedures will be in a state of being warmed by the previous drying process.

In the present embodiment, the thermistor 14 is used for detecting both the temperature of the washing water and the temperature of the outside air. Therefore, the thermistor 14 is disposed in a state of being connected to the outer side of the bottom of the cleaning tank 2. As described above, in the continuous operation, in the state where the wall surface of the cleaning tank 2 has been warmed by the previous drying process, the thermistor 14 cannot accurately detect the temperature of the outside air at the start of the operation, and constitutes False detection.

That is, a higher temperature is detected by the thermistor 14 than the actual outside air temperature. If the control is performed based on the result, the heat of the drying process is reduced as compared with the standard heat, and sufficient drying performance cannot be obtained, and there is a possibility that the tableware 9 is not completely dried. That is, the more the amount of the tableware 9 is, the lower the outside air temperature is, and the greater the influence on the drying performance due to the erroneous detection.

This countermeasure is to set the second predetermined temperature T2 as a threshold value higher than the first predetermined temperature T1 when the temperature detection by the thermistor 14 is used. When it is determined that the outside air temperature detected when the operation is started is higher than the second predetermined temperature T2, the control unit 15 measures the temperature rise when the thermistor 14 is used. between. The water temperature rise time refers to the time taken to raise the predetermined temperature by the water temperature of the washing water supplied to the water in the heating washing program.

When it is determined that the water temperature rise time is longer than the predetermined time, the control unit 15 determines that the temperature of the wash water of the feed water is low, that is, the outside air temperature is lower than the temperature detected by the thermistor 14. In other words, the control unit 15 determines that the temperature of the inside of the washing tank 2 is increased due to the continuous operation by detecting the high outside air temperature by the thermistor 14.

Further, the control unit 15 performs an operation control for increasing the heating washing temperature T3 in the setting of the heating and washing program in comparison with the initial setting, instead of performing the energy-saving operation while reducing the heat in the drying process. Thereby, since the temperature at the start of the drying process can be increased, it is possible to prevent a decrease in drying performance when the outside air temperature is erroneously detected.

Further, the second predetermined temperature T2 is set to a temperature higher than the first predetermined temperature T1. In consideration of the usual setting and use of the room in the dish washing and drying machine 50, the second predetermined temperature T2 should be set to a temperature which is not easily reached, for example, 35 °C.

Next, the setting process of the specific operating conditions of the dish washing and drying machine 50 will be described.

Fig. 3 is a flow chart for explaining the condition setting of the dish washing and drying machine 50 in the embodiment of the present invention.

The control unit 15 starts the condition setting simultaneously with the start of the operation of the dish washing and drying machine 50 (S1).

First, the thermistor 14 detects the outside air temperature (S2), and the control unit 15 determines whether or not the detected outside air temperature is equal to or greater than the first predetermined temperature T1 (S3).

When the detected outside air temperature is less than the first predetermined temperature T1 (S3, NO), the control unit 15 maintains the initial setting without changing the amount of heat input to the heater 8 by the drying program (S4). Moreover, at this time, the control unit 15 also maintains the initial heating setting of the heating washing temperature T3 without changing (S5), and ends the condition setting.

On the other hand, if the outside air temperature measured in step S2 is equal to or greater than the first predetermined temperature T1 (S3, YES), the control unit 15 changes the setting to decrease the drying program toward the heater as compared with the initial setting. 8 input heat (S6).

After step S6, the control unit 15 determines whether or not the outside air temperature detected in step S2 is equal to or greater than the second predetermined temperature T2 (S7).

When the detected outside air temperature is less than the second predetermined temperature T2 (S7, NO), the control unit 15 maintains the initial setting without changing the heating washing temperature T3 (S5), and ends the condition setting.

On the other hand, when the outside air temperature detected in step S2 is equal to or greater than the second predetermined temperature T2 (S7, YES), the control unit 15 determines the washing detected by the thermistor 14 in the heating and washing program. Whether the water temperature rise time of the water is longer than the predetermined time (S8).

When the water temperature rise time is less than the predetermined time (S8, NO), the control unit 15 maintains the initial setting without changing the heating wash temperature T3 (S5), and ends the condition setting.

On the other hand, when the water temperature rise time is equal to or longer than the predetermined time (S8, YES), the control unit 15 changes the setting to increase the heating wash temperature T3 (S9) as compared with the normal state, and ends the condition setting.

As described above, in the dish washing and drying machine 50 of the present embodiment, Since it is not necessary to provide the opening portion in the cleaning tank 2 and the thermistor 14 is attached, there is no possibility of water leakage from the opening. Further, by arranging the thermistor 14 to be connected to the outside of the bottom of the cleaning tank 2, the correct outside air temperature can be detected. Thereby, the most appropriate operation control according to the outside air temperature can be constructed, and the energy saving of the drying process can be achieved.

Further, in the present embodiment, an example in which the control unit 15 controls the on-off time of the heater 8 in order to reduce the heat of the drying process will be described. However, the invention is not limited thereto. The control unit 15 can also achieve energy saving of the drying process in the same manner by reducing the voltage applied to the heater 8 or shortening the drying process.

Industrial availability

As described above, according to the present invention, the outside air temperature can be accurately detected without leaking water, and the air in the tank can be warmly washed in accordance with the state of taking in the temperature of the outside air in the washing tank. The control is most appropriate and the energy saving of the drying process is achieved. Accordingly, the present invention is useful as a dish washing and drying machine that washes washed water such as tableware and the like by washing the washing water.

1‧‧‧ body

2,121‧‧‧cleaning trough

3‧‧‧Water supply valve

4‧‧‧Water Storage Department

5‧‧‧Washing pump

5a‧‧‧cleaning motor

6‧‧‧Dish filter

7‧‧‧ Washing nozzle

8,126‧‧‧heater (heating section)

9‧‧‧Tableware (washed)

10‧‧‧Tableware Cage

11‧‧‧Drainage pump

11a‧‧‧Drain motor

12‧‧‧Drain hose

13,125‧‧‧Air supply fan

14‧‧‧Thermistor (Temperature Detection Department)

15‧‧‧Control Department

50,100‧‧‧Tableware washing and drying machine

121a‧‧‧Connecting Department

122‧‧‧ Inspiratory catheter

123‧‧‧Fan box

124‧‧‧Motor

127‧‧‧ cover

127a‧‧‧ openings

128‧‧‧Tableware

129‧‧‧ Temperature sensing element

S1, S2, S3, S4, S5, S6, S7, S8, S9‧‧ steps

T1‧‧‧1st predetermined temperature

T2‧‧‧2nd predetermined temperature

T3‧‧‧heating washing temperature

Fig. 1 is a side sectional view showing the internal structure of the dish washing and drying machine in the embodiment of the present invention.

Fig. 2A is a graph showing changes in temperature inside the washing tank of each operation program in the dish washing and drying machine according to the embodiment of the present invention.

Fig. 2B is a view showing an operation state of each component of each operation program in the dish washing and drying machine according to the embodiment of the present invention.

Figure 3 is a view for explaining the cleaning of the dishes in the embodiment of the present invention. Flow chart of condition setting of dryer.

Fig. 4 is a side view showing the internal configuration of a conventional dishwashing and drying machine.

1‧‧‧ body

2‧‧‧cleaning trough

3‧‧‧Water supply valve

4‧‧‧Water Storage Department

5‧‧‧Washing pump

5a‧‧‧cleaning motor

6‧‧‧Dish filter

7‧‧‧ Washing nozzle

8‧‧‧heater (heating section)

9‧‧‧Tableware (washed)

10‧‧‧Tableware Cage

11‧‧‧Drainage pump

11a‧‧‧Drain motor

12‧‧‧Drain hose

13‧‧‧Air supply fan

14‧‧‧Thermistor (Temperature Detection Department)

15‧‧‧Control Department

50‧‧‧Tableware washing and drying machine

Claims (2)

A dish washing and drying machine includes: a washing tank for storing the object to be washed; and a heating unit installed in the washing tank to heat the washing water and heating the outside of the drying process. The air detecting unit is provided in contact with the outer side of the bottom of the washing tank, and detects the temperature of the washing water and the outside air temperature; and the control unit controls the foregoing based on the detection result of the temperature detecting unit. The operator of the heating unit detects the outside air temperature at the start of the operation, and the control unit determines that the outside air temperature detected by the temperature detecting unit is higher than the first predetermined temperature. The control for reducing the amount of heat input to the heating portion in the drying process described above is reduced as compared with the usual. The dishwasher cleaning and drying machine according to claim 1, wherein the control unit determines that the outside air temperature detected by the temperature detecting unit is higher than a second predetermined higher temperature than the first predetermined temperature at the start of the determination operation. At the temperature, the temperature detecting unit detects the water temperature rise time in the heating and washing program, and when it is determined that the water temperature rise time is longer than the predetermined time, the heating washing temperature of the heating and washing program is increased as compared with usual. control.