TWI633866B - Tableware cleaning and drying machine - Google Patents

Abstract

The utility model has an air supply air passage and a connecting air passage which communicates with the exhaust air passage, and the connection air passage has a dehumidifying portion and a first air door. The air supply air passage has a blower portion and a second damper, and the exhaust air passage has a third damper. The exhaust port outside the tank of the exhaust air passage is disposed in the casing. The control unit has a configuration in which the plurality of dampers are adjusted during the operation of the drying step, and the switching control forms a circulation path by the cleaning tank and the connection air passage without performing the circulation operation of the supply and exhaust, and restricting the circulation path for supply and exhaust. The composition of the gas supply and exhaust operation. Thereby, the drying efficiency in the washing tank can be improved.

Description

Tableware cleaning and drying machine Field of invention

The present invention relates to a dish washing and drying machine which is installed in a kitchen or the like and which automatically washes and dries the washed matter such as dishes.

Background of the invention

In the past, in the drying step, the dishwashing and drying machine that does not perform the exhausting has a circulation air path for circulating air in the tank, a dehumidifying portion provided in the circulation air passage, and a tableware accommodated in the washing tank. drying. Specifically, first, the humid air in the tank is sent to the circulation air passage. Next, the humid air is dehumidified by the circulation air passage and the dehumidifying portion provided in the circulation air passage. Then, the dried air is again introduced into the tank to dry the dishes contained in the washing tank. For example, Japanese Laid-Open Patent Publication No. 2010-094247 (hereinafter referred to as Patent Document 1) is disclosed in Japanese Laid-Open Patent Publication No. 2010-094247.

Hereinafter, the configuration of the dish washing and drying machine described in Patent Document 1 and the flow of the air for drying the tableware will be described with reference to FIG. 6 .

Figure 6 is a side cross-sectional view of a conventional dishwashing and drying machine. Furthermore, Fig. 6 also shows the flow of air in the drying step of the dishwashing and drying machine.

As shown in Fig. 6, the conventional dish washing and drying machine is composed of a casing 101, a washing tank 103, a cutlery basket 105, a water supply valve 106, a washing pump 107, a washing nozzle 108, a control unit 124, and the like. The washing tank 103 is provided in a casing 101 that can open and close the door 102. The cutlery basket 105 is placed in the washing tank 103 by placing the laundry 104 such as tableware. The water supply valve 106 supplies the washing water to the washing tank 103 by opening and closing. The washing pump 107 pressurizes the washing water and supplies it to the washing nozzle 108 having a plurality of injection ports. The washing nozzle 108 sprays the washing water supplied from the washing pump 107 to wash the washed object 104. The control unit 124 controls a series of operation operations of the dish washing and drying machine shown below, such as a washing step, a rinsing step, and a drying step.

Hereinafter, the operation of the conventional dishwashing and drying machine will be described with reference to Fig. 6 .

As shown in FIG. 6, first, in the drying step, the control unit 124 circulates the blower 114 through the casing, and sends the air to the washing tank 103 from the dehumidification path 115. The introduced air is returned to the inside of the casing circulating blower 114 through the moisture absorbing portion 116 and the heat exchange portion 117 in the washing tank 103. Thereby, the air in the washing tank 103 can be circulated.

Further, in the condensation path 118 on the outer side of the cleaning tank 103, the air in the condensation path 118 is circulated by circulating the blower 119 through the condensation path. Specifically, the air is circulated from the condensation path circulation blower 119 to the condensation path circulation blower 119 through the regeneration unit heater 120, the regeneration unit 121, and the heat exchange unit 117.

Further, the moisture absorbing portion 116 on the side of the cleaning tank 103 and the regeneration portion 121 on the side of the condensation path 118 are rotated by a rotation driving unit (not shown), and the moisture absorbing portion 116 and the reproduction unit 121 gradually alternate. At this time, the moisture in the washing tank 103 adsorbed by the moisture absorbing unit 116 is detached by the regeneration unit heater 120 in the regeneration unit 121. The detached moisture (water vapor) is condensed in the heat exchange portion 117 of the condensation path 118. Then, the condensed water is concentrated and passed through the condensed water drain path 123, and is drained by the drain path 109. Thereby, the dehumidification and regeneration can be performed simultaneously, and the continuous drying operation can be performed.

In other words, when the dish washing and drying machine having the drying mechanism of the above-described conventional circulation air path is assembled and installed in the system kitchen utensils or the like, it may be configured such that the front surface of the casing is not provided to be wet in the washing tank. Air exhaust to the outside of the machine. Therefore, in the entire front door of the casing of the dish washing and drying machine, the same decorative panel as the door of the surrounding system kitchenware can be installed. In this way, it becomes a tableware washing and drying machine which is excellent in design which adopts the uniform sense of the design of the system kitchenware.

Further, the above-described conventional dishwashing and drying machine can be efficiently dehumidified in the drying step in the initial stage of drying in which the humidity of the air in the washing tank is high. However, by dehumidification, in a stage where the drying of the air in the washing tank is continued to some extent, the effect of dehumidification is remarkably lowered for the following reasons. That is, in general, the dehumidifying portion dehumidifies the air in the washing tank by the difference in temperature of the saturated water vapor amount of the air. Therefore, when the humidity of the air sent to the circulation air passage is 100% or less, it is difficult to cause condensation due to a drop in temperature. As a result, the dehumidification effect is lowered.

Summary of invention

The invention provides a tableware cleaning and drying machine, which is if dried When the dehumidification efficiency of the mechanism is reduced, the air supply and exhaust mechanism can be used to improve the drying efficiency.

That is, the dishwasher of the present invention has at least a cleaning tank, a washing nozzle, a washing pump, a heating unit, and a control unit that controls the series of washing operations, the rinsing step, and the drying step in the casing. The washing tank is provided with an air supply air passage, an exhaust air passage having an outer exhaust port, and a connecting air passage connecting the air supply side connecting portion of the air supply air passage and the exhaust side connecting portion of the exhaust air passage. The connecting air passage is provided with a dehumidifying portion for dehumidifying the air passing through the connecting air passage, and a supply air portion is provided between the air supply side connecting portion and the cleaning air passage. a first damper that is disposed between the dehumidifying portion and the exhaust side connecting portion, and a second damper that is disposed on the air supply side of the air supply side And a third damper that is disposed on the exhaust air passage outside the washing tank than the exhaust side connecting portion that connects the exhaust air passage and the connecting air passage. Next, the control unit has a configuration in which the first damper, the second damper, and the third damper are adjusted during the operation of the drying step, and the circulation path is formed by the cleaning tank and the connection air passage, and the circulation operation is performed without supplying and exhausting. And controlling the supply and exhaust operation of the supply and exhaust of the outside of the cleaning tank by limiting the amount of circulating air in the circulation path.

According to this configuration, in the drying step, first, dehumidification is performed by the circulation operation. Next, when the efficiency of drying of the dehumidifying section is lowered, switching to the supply and exhaust operation for restricting the amount of circulating air of the circulation path and discharging the air in the washing tank to the outside of the washing tank. Thereby, the efficiency of drying can be improved.

Further, during the supply and exhaust operation, the relative humidity of the air in the washing tank discharged is 100% or less. Therefore, even if air is exhausted into the casing, there is little adverse effect due to condensation or the like. Therefore, it is not necessary to clean and dry the dishes. Set the exhaust port on the front door of the machine. Therefore, the decorative board of the system kitchenware can be installed on the door. As a result, a sense of unity in the design of the system's kitchen utensils can be achieved. That is to say, it is possible to realize a dish washing and drying machine which can improve the drying performance while maintaining the excellent design of the system kitchenware.

Further, the dish washing and drying machine casing of the present invention has at least a washing tank, a washing nozzle, a washing pump, a heating unit, and a control unit for controlling a series of operations of the washing step, the rinsing step, and the drying step. The washing tank has an air supply air passage, an exhaust air passage having an outer exhaust port, and a connecting air passage connecting the air supply side connecting portion of the air supply air passage and the outlet of the washing tank. The connection air passage is provided with a dehumidification portion for dehumidifying the air passing through the connection air passage, and a supply air portion is provided in the air supply air passage between the air supply side connecting portion and the cleaning tank. The first damper that is disposed between the dehumidifying portion and the outlet, and the second damper that is disposed on the outside of the cleaning tank at the air supply side connecting portion, and the second damper that is disposed on the outside of the cleaning tank The third damper of the road. Then, the control unit has a configuration in which the first damper, the second damper, and the third damper are adjusted during the operation of the drying step, and the switching groove is controlled to form a circulation path with the connection air passage, and the supply and exhaust are not performed. The circulating operation and the amount of circulating air in the circulation path are restricted, and the exhaust air passage is configured to perform an air supply and exhaust operation to the outside of the washing tank.

According to this configuration, in the drying step, first, dehumidification is performed by the circulation operation. Then, when the drying efficiency of the dehumidifying section is lowered, switching to the air supply and exhaust operation for restricting the circulating air amount of the circulation path, and discharging the air in the washing tank to the outside of the washing tank through the exhaust air passage. . Thereby, the efficiency of drying can be improved.

Moreover, during the supply and exhaust operation, the phase of the air in the cleaning tank is discharged. The humidity is 100% or less. Therefore, even if the air is exhausted into the casing, the adverse effect due to condensation or the like is small. Thereby, it is not necessary to provide an exhaust port in the front door of the dishwasher washing and drying machine. Therefore, the decorative board of the system kitchenware can be installed on the door. As a result, a sense of unity in the design of the system's kitchen utensils can be achieved.

Further, the exhaust air passage may be provided on the wall surface of the washing tank different from the circulation path, and the flow direction of the air in the washing tank may be changed when the circulation operation is switched to the air supply and exhaust operation. Therefore, the degree of drying of the washed matter in the washing tank is not uneven. Thereby, the entire laundry can be uniformly dried.

1‧‧‧Shell

2‧‧‧cleaning trough

3‧‧‧

3a‧‧‧Handle

4‧‧‧Cleaned

5‧‧‧Tableware basket

6‧‧‧Water supply valve

6a‧‧‧Water supply pipe

7‧‧‧ Washing nozzle

8‧‧‧Washing pump

9‧‧‧ heating department

10‧‧‧temperature sensor

11‧‧‧Control Department

12‧‧‧ gas supply road

12a‧‧‧Air supply side connection

13‧‧‧Air Supply Department

14‧‧‧ gas supply port

15‧‧‧Air outlet

16‧‧‧Exhaust air path

16a‧‧‧Exhaust side connection

17‧‧‧In-slot exhaust

18‧‧‧Outside vents

19‧‧‧Contact Wind Road

20‧‧‧Dehumidification Department

21‧‧‧ Temperature and Humidity Sensor

22‧‧‧1st damper

23‧‧‧2nd damper

24‧‧‧3rd damper

25‧‧‧Drainage pipe

26‧‧‧Switching the damper

27‧‧‧Complex damper

27a‧‧‧1st body

27b‧‧‧2nd valve body

28‧‧‧ gas supply road

29‧‧‧Exhaust air path

29a‧‧‧Exhaust side connection

30‧‧‧ gas supply port

31‧‧‧Rotary axis

32‧‧‧Contact Wind Road

33‧‧‧ gas supply road

33a‧‧‧ gas supply side connection

34‧‧‧Exhaust air path

35‧‧‧1st damper

36‧‧‧2nd damper

37‧‧‧3rd damper

38‧‧‧Export

39‧‧‧In-slot exhaust

40‧‧‧outside vents

101‧‧‧ housing

102‧‧‧

103‧‧‧cleaning trough

104‧‧‧Cleaned

105‧‧‧Tableware basket

106‧‧‧Water supply valve

107‧‧‧Washing pump

108‧‧‧ Washing nozzle

109‧‧‧Drainage path

114‧‧‧Box internal circulation blower

115‧‧‧Dehumidification path

116‧‧‧Damping department

117‧‧‧Heat Exchange Department

118‧‧‧ Condensation path

119‧‧‧Condensation path circulating blower

120‧‧‧Regeneration heater

121‧‧‧Reproductive Department

123‧‧‧Condensate drainage path

124‧‧‧Control Department

A‧‧‧ arrow mark

B‧‧‧arrow mark

Fig. 1 is a side cross-sectional view showing a circulating operation state of the dish washing and drying machine in the first embodiment of the present invention.

Fig. 2 is a side sectional view showing the state of supply and exhaust operation of the dishwasher washing and drying machine.

Fig. 3 is a side cross-sectional view of an essential part showing a circulating operation state of the dish washing and drying machine in the second embodiment of the present invention.

Fig. 3B is a side sectional view showing the main part of the air supply and exhaust operation state of the dishwasher cleaning and drying machine.

Fig. 4 is a side cross-sectional view of an essential part showing a circulating operation state of the dish washing and drying machine in the third embodiment of the present invention.

Fig. 4B is a side cross-sectional view showing an essential part of the air supply and exhaust operation state of the dishwasher cleaning and drying machine.

Fig. 5 is a side cross-sectional view showing a circulating operation state of the dish washing and drying machine in the fourth embodiment of the present invention.

Figure 6 is a longitudinal sectional view of a conventional dishwashing and drying machine.

Detailed description of the preferred embodiment

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Furthermore, the present invention is not limited by the embodiment.

(Embodiment 1)

Hereinafter, the configuration of the dish washing and drying machine according to the first embodiment of the present invention will be described with reference to Figs. 1 and 2 . In addition, the following is an illustration of a built-in type dishwashing and drying machine that is housed in a system of kitchen utensils, but is not limited thereto.

Fig. 1 is a side cross-sectional view showing a cycle operation state of the dish washing and drying machine according to the first embodiment of the present invention. Fig. 2 is a side sectional view showing the state of supply and exhaust operation of the dishwasher washing and drying machine.

As shown in FIGS. 1 and 2, the dish washing and drying machine of the present embodiment includes at least a casing 1, a washing tank 2, a cutlery basket 5, a water supply valve 6, a washing nozzle 7, a washing pump 8, and a heating unit 9. The temperature sensor 10, the control unit 11, and the like are configured. The washing tub 2 is housed inside the casing 1 having an opening in the front. At this time, the cleaning tank 2 has a rail (not shown) below the side portions on the left and right outer sides, and is housed by the housing 1 while being movable in parallel in the front-rear direction. Further, the washing tank 2 has a door 3 covering the opening of the casing 1 at the front, and has an opening on the upper surface. The cutlery basket 5 is disposed inside the washing tub 2, and accommodates the laundry 4 such as tableware. The water supply valve 6 is installed in the water supply pipe 6a which is branched by the water pipe, and controls the supply of the washing water to the washing tank 2 by opening and closing.

The washing nozzle 7 is rotatably disposed below the cutlery basket 5 And in the cleaning tank 2. The washing pump 8 pressurizes the washing water stored in the washing tank 2, and supplies it to the washing nozzle 7. Next, the washing nozzle 7 sprays the supplied washing water from a plurality of jets to wash the object 4 to be washed.

The heating unit 9 is constituted by a heater or the like and is provided near the bottom of the washing tank 2. Next, the heating unit 9 heats the washing water, air, or the like to a proper temperature. The temperature sensor 10 is disposed outside the bottom surface of the washing tank 2 in the vicinity of the heating unit 9, and the temperature of the washing water or the air in the washing tank 2 is detected by the washing tank 2.

The control unit 11 is provided outside the front portion of the washing tank 2, and controls a series of washing operations such as a washing step, a rinsing step, and a drying step.

Further, as shown in Figs. 1 and 2, the dish washing and drying machine of the present embodiment is provided with an air passage for allowing air to flow in the drying step between the washing tank 2 and the door 3. The wind path is configured by at least the air supply air path 12, the exhaust air path 16, and the connection air path 19, and communicates with the inside of the cleaning tank 2 or the casing 1.

The air supply duct 12 has an air supply port 14 and a blower port 15, and is provided in a lower portion of the front side of the washing tank 2 in the casing 1. Further, the air supply duct 12 is provided with a blower unit 13 such as a fan. Then, the air blowing unit 13 sucks the air outside the washing tank 2 by, for example, the air supply port 14 of the air supply duct 12, and introduces it from the air blowing port 15 into the washing tank 2 (see FIG. 2).

The exhaust air passage 16 has an in-slot exhaust port 17 and an out-of-slot exhaust port 18 constituting an exhaust outlet, and is provided in an upper portion of the front side of the washing tank 2 in the casing 1. The out-of-slot exhaust port 18 of the exhaust air passage 16 is opened in the casing 1, and the inside of the washing tank 2 is opened (communicated) with the casing 1. At this time, in the state shown in FIG. 2, the air in the cleaning tank 2 is led out from the in-tank exhaust port 17 by the operation of the air blowing portion 13 provided in the air supply duct 12, and the exhaust port is exhausted from the slot. 18 is discharged into the casing 1.

The communication air passage 19 is connected to the air supply side connecting portion 12a of the air supply air passage 12 and the exhaust side connecting portion 16a of the exhaust air passage 16, and is connected to the circulation air passage in the cleaning tank 2. Further, the connection air passage 19 has the dehumidifying portion 20 and the temperature and humidity sensor 21, and dehumidifies the air passing through the connection air passage 19. Further, the dehumidifying unit 20 is constituted by an adsorption/disengagement mechanism using a moisture adsorbing material such as zeolite. In addition, the dehumidifying unit 20 may be constituted by a condensing mechanism using a cooler such as a Peltier element or a heat pump device, or a condensing mechanism that exchanges heat with cooling air introduced from the outside of the casing 1. In other words, the configuration in which the air passing through the connection air passage 19 can be dehumidified is not particularly limited to the above configuration.

Further, as shown in FIGS. 1 and 2, the first damper 22, the second damper 23, and the third damper 24 are provided in the air passage including the air supply air passage 12, the exhaust air passage 16, and the communication air passage 19. The first damper 22 is provided between the dehumidifying portion 20 and the exhaust side connecting portion 16a of the connecting air passage 19 to open and close the connecting air passage 19. The second damper 23 is provided between the air supply side connecting portion 12a of the air supply air passage 12 and the air supply port 14 to open and close the air supply air passage 12. The third damper 24 is provided between the exhaust side connecting portion 16a of the exhaust air passage 16 and the out-of-slot exhaust port 18 to open and close the exhaust air passage 16. Next, the first damper 22, the second damper 23, and the third damper 24 are driven to be opened and closed by, for example, a motor or the like.

Further, the air blowing portion 13 is provided between the air supply side connecting portion 12a of the air supply air passage 12 and the air blowing port 15 that communicates with the cleaning tank 2.

Next, as shown in FIG. 1, the second air door 23 and the third air door 24 are closed, and the connection air path 19 is connected via the air supply air path 12, the air supply unit 13, the cleaning tank 2, and the exhaust air path 16. Loop path.

According to the above, the dish washing and drying machine of this embodiment is constructed.

Hereinafter, the operation and action of the dish washing and drying machine of the present embodiment will be described with reference to Figs. 1 and 2 .

First, the user grasps the handle 3a formed on the door 3, and pulls the cleaning tank 2 from the casing 1 toward the front (the left side in the drawing).

Next, the laundry 4 such as tableware is placed in the cutlery basket 5 in the washing tank 2, and the washing tank 2 is housed in the casing 1. Next, the user sets the operation by an operation unit (not shown) to start the cleaning operation.

When the operation of the dish washing and drying machine is started, the control unit 11 adheres to the washing step of washing off the dirt of the object to be washed 4, the washing step of washing off the adhered lotion or residue, and attaching it to the operation setting. In the order of the drying step of the moisture drying of the washed matter 4 or the cleaning tank 2, a series of actions shown below are performed.

First, the washing step will be explained.

In the washing step, the control unit 11 opens the water supply valve 6 of the water supply pipe 6a to supply water to the washing tank 2. Then, when the predetermined amount of water supply to the washing tank 2 is completed, the control unit 11 closes the water supply valve 6 and stops the water supply.

Next, the control unit 11 is energized to the heating unit 9 such as a heater, and heats the washing water in the washing tank 2 to operate the washing pump 8. Next, the warm water is sprayed by the washing nozzle 7 and sprayed onto the object 4 to be stored in the cutlery basket 5. At this time, the cleaning nozzle 7 is rotated by the reaction force injected into, for example, the oblique washing water from the injection port of the washing nozzle 7. Thereby, the washing water can be sprinkled over the entire object 4 to be washed. As a result, the washing effect can be improved. Furthermore, the control unit 11 detects that the washing water is at a predetermined temperature (for example, 55 ° C) by the temperature sensor 10 In the case of the upper stage, control for stopping the energization of the heating unit 9 or the like is performed.

Next, after performing the predetermined washing operation, the control unit 11 reversely rotates the washing pump 8 and discharges the washing water containing the dirt to the outside of the casing 1 through the drain pipe 25. Thereby, the washing step is ended and the process is shifted to the rinsing step.

Hereinafter, the rinsing step will be described.

In the rinsing step, the control unit 11 opens the water supply valve 6 of the water supply pipe 6a, supplies new washing water to the washing tank 2, and closes when the predetermined amount is reached to stop the water supply.

Next, the control unit 11 operates the washing pump 8, and sprays the washing water again from the injection port of the washing nozzle 7. Then, after the rinsing of the washed matter 4 to which the lotion or the residue adheres is performed for a predetermined period of time, the washing water is discharged and the washing water is again supplied, and the rinsing operation is repeated a predetermined number of times.

Finally, the control unit 11 discharges the washing water, ends the rinsing step, and enters the drying step.

Further, in the drying step performed after the rinsing step, in order to efficiently dry the object 4 in a short time, it is preferable to heat the object 4 at the beginning of the drying step. Therefore, usually, the final rinse operation is carried out with a washing water having a high temperature of 60 ° C to 70 ° C. Thereby, the object to be washed 4 can be efficiently dried in a short time, and the sterilization process in the object to be washed 4 or the cleaning tank 2 can be simultaneously performed.

Hereinafter, the drying step will be described.

When the drying step is started, the control unit 11 first opens the first damper 22 to open the communication air passage 19 as shown in FIG. 1, and closes the second damper 23 and the third damper 24. Thereby, the air supply passage 12, the air supply portion 13, the cleaning tank 2, and the row are formed. The air path 16 and the circulation path connecting the air path 19 are connected. Next, the control unit 11 passes through the circulation path, and performs dehumidification of the air in the cleaning tank 2 by not performing the circulation operation of the supply and exhaust from the cleaning tank 2. Specifically, the control unit 11 operates the blower unit 13 to circulate air along the circulation path. The circulating air evaporates the moisture adhering to the surface of the object to be cleaned 4 or the washing tank 2 in the washing tank 2, and dries the water. At this time, the humid air which is dried by the surface of the object to be cleaned 4 or the cleaning tank 2 is supplied from the inside of the washing tank 2 through the in-tank exhaust port 17 and the exhaust side connecting portion 16a of the exhaust air passage 16. It flows into the connecting wind road 19. The humid air that has flowed in passes through the dehumidifying portion 20 to be dehumidified. The dehumidified air becomes low-humidity air, and the object to be washed 4 is again dried by the air blowing portion 13, so that it is sent into the cleaning tank 2 through the air supply port 15 of the air supply air passage 12. At this time, it is preferable to conduct electricity to the heating unit 9 to heat the circulating air. Thereby, the drying of the moisture adhering to the surface of the object to be cleaned 4 or the washing tank 2 can be promoted, and the drying efficiency can be improved.

However, as described above, as the drying step is performed, as the humidity of the circulating air is lowered, the efficiency of the dehumidifying portion 20 is lowered.

Therefore, in the present embodiment, the control unit 11 detects the temperature or humidity of the air circulating in the circulation path by the temperature and humidity sensor 21 provided in the connection air path 19. Next, when the temperature and humidity sensor 21 detects that the humidity of the air is lower than a predetermined value, the control unit 11 operates the first damper 22, the second damper 23, and the third damper 24. In other words, the flow rate of the circulating air flowing through the connecting air passage 19 constituting the circulation path is restricted, and the inside of the washing tank 2 is communicated with the outside. Thereby, the flow of the air in the washing tank 2 is changed from the circulation state to the supply and exhaust state. In other words, the control unit 11 switches the operation operation from the circulation operation to the circulating air amount of the restriction circulation path, and supplies the external air supply in the cleaning tank 2. Exhaust gas supply and exhaust operation. 2 is a view exemplifying a case where the cycle operation shown in FIG. 1 is completely switched to the air supply and exhaust operation.

Specifically, as shown in FIG. 2, in the air supply and exhaust operation, the control unit 11 closes the first damper 22, closes the ventilating air passage 19, opens the second damper 23, and opens the air supply passage 12 into the casing 1. Further, the third damper 24 is opened, and the exhaust air passage 16 is opened into the casing 1. Thereby, the supply and exhaust operation is performed.

Hereinafter, the operation and action of the supply and exhaust operation of the dish washing and drying machine of the present embodiment will be described with reference to Fig. 2 .

First, when the control unit 11 operates the blower unit 13, the air outside the washing tank 2 (in the casing 1) is sucked by the air supply port 14 of the air supply duct 12. The sucked air passes through the air supply duct 12 and the air blowing unit 13 and is introduced into the washing tank 2 from the air blowing port 15 of the air supply duct 12 . The introduced air dries the moisture adhering to the surface of the object 4 to be cleaned or the surface of the washing tank 2 in the washing tank 2. The air for drying the surface of the object to be cleaned 4 or the cleaning tank 2 is led out from the in-tank exhaust port 17 to the exhaust air path 16, and is separated from the outer exhaust port 18 to the washing tank 2 (the housing 1) Discharged inside. At this time, normally, the control unit 11 stops the operation of the dehumidifying unit 20. This reason is that the humidity of the air discharged into the casing 1 is lowered as compared with the humidity at the initial stage of the drying step. Therefore, this is because the possibility that the discharged air is dew condensation in the casing 1 is small. However, depending on the degree of progress of the drying, in the state in which the dehumidifying unit 20 is operated, it is preferable to use the circulation operation and the supply and exhaust operation in combination. In this case, the control unit 11 can also adjust the opening degrees of the first damper 22, the second damper 23, and the third damper 24, and communicate the air that is also discharged to the connection air passage 19, and dehumidify the dehumidifying unit 20. Thereby, the circulation operation and the supply and exhaust operation are used in combination, and dew condensation in the casing 1 can be more reliably prevented. Furthermore, the first damper 22, the second damper 23, and the third damper The opening degree of 24 can of course be arbitrarily adjusted in accordance with the value of the detection of the temperature and humidity sensor 21.

That is to say, the humidity of the air in the washing tank 2 is remarkably lowered by the circulation operation. Next, during the air supply and exhaust operation, the relative humidity of the air discharged into the washing tank 2 in the casing 1 is 100% or less. Therefore, even when air is exhausted from the outer exhaust port 18 of the exhaust air passage 16 into the casing 1, the occurrence of dew condensation in the casing 1 can be sufficiently suppressed.

In the present embodiment, the vent hole that communicates with the casing 1 and the outside is described as an example which is not shown or described. However, for example, the vent hole through which the outside of the casing 1 and the air may flow may be provided on any wall surface other than the front surface of the casing 1. Thereby, it is possible to suppress the possibility that the air exhausted from the cleaning tank 2 is dew condensation inside the casing 1. Further, since it is possible to prevent the air discharged from the washing tank from circulating in the casing and resupply the air from the air supply port, the air supplied to the washing tank 2 via the air supply duct 12 can be cooled to a lower temperature and a lower humidity. possibility.

As described above, the dish washing and drying machine of the present embodiment has the supply air path 12 and the exhaust air path 16 in the cleaning tank 2, and the connection air path 19 that communicates with the table. The out-of-slot exhaust port 18 of the exhaust air passage 16 is provided in the casing 1. The connection air passage 19 is provided with a dehumidifying portion 20. Further, the first air dam 22, the second damper 23, and the third damper 24 are provided in each of the air passages 19, the air supply duct 12, and the exhaust air duct 16. Next, the control unit 11 adjusts the opening and closing of the first damper 22, the second damper 23, and the third damper 24 provided in the connection air passage 19, the supply air passage 12, and the exhaust air passage 16 during the operation of the drying step. The air blowing unit 13 is operated by the opening degree. Thereby, it is configured to switch the cleaning tank 2 and the connection air passage 19 to form a circulation path without The externally performing the circulation operation of the supply and exhaust, and the supply and exhaust operation for restricting the circulation path and the external supply and exhaust, and performing the drying step.

According to this configuration, first, in the drying step, dehumidification is performed by the circulation operation. Next, when the efficiency of drying by the dehumidifying unit 20 is lowered, the operation of the exhausting operation is switched to discharge the air in the washing tank 2 to the outside of the tank. Thereby, the efficiency of drying can be improved, and the drying time can be shortened.

Further, during the supply and exhaust operation, the relative humidity of the air in the cleaning tank 2 discharged is 100% or less. Therefore, when the air in the washing tank 2 is exhausted into the casing 1, the adverse effects such as dew condensation are also reduced. Thereby, it is not necessary to provide an exhaust port in the door 3 before the dishwasher washing and drying machine. As a result, the decorative board of the system kitchenware can be installed on the entire door 3, and the design can be improved.

(Embodiment 2)

Hereinafter, the configuration of the dish washing and drying machine in the second embodiment of the present invention will be described with reference to Figs. 3A and 3B.

Fig. 3 is a side cross-sectional view showing an essential part of a cycle operation state of the dish washing and drying machine in the second embodiment of the present invention. Fig. 3B is a side sectional view showing the main part of the supply and exhaust operation state of the dishwasher cleaning and drying machine.

The dish washing and drying machine of the present embodiment differs from the first embodiment in that the first damper 22 and the third damper 24 are deleted, and the switching damper 26 is provided at the exhaust side connecting portion 16a instead. At this time, the switching damper 26 has a rotating shaft 26a on the exhaust side connecting portion 16a on the out-of-slot exhaust port 18 side of the exhaust air passage 16, and opens and closes the exhaust air passage 16 and the connecting air passage 19. In other words, the switching damper 26 has the functions of the first damper 22 and the third damper 24. The other configuration is the same as that described in the first embodiment.

That is, as shown in FIG. 3A, the switching damper 26 is provided in the exhaust side connecting portion 16a of the connecting air path 19 and the exhaust air path 16, and when the exhaust air path 16 is closed, the connecting air path 19 is opened. On the other hand, as shown in FIG. 3B, when the switching damper 26 closes the communication air passage 19, the exhaust air passage 16 is opened. Thereby, the functions of the first damper 22 and the third damper 24 of the first embodiment are realized by one switching damper 26.

According to the above, the dish washing and drying machine of this embodiment is constructed.

Hereinafter, the operation and action of the dish washing and drying machine of the present embodiment will be described with reference to Figs. 3A and 3B. In addition, the washing step and the rinsing step to start the operation of the dish washing and drying machine are the same as in the first embodiment. Therefore, different drying steps are explained below.

At the start of the drying step, as shown in FIG. 3A, the control unit 11 closes the exhaust air passage 16 to open the communication air passage 19 by switching the damper 26. At the same time, the second damper 23 is closed to close the air supply duct 12. Thereby, a circulation path that communicates through the supply air passage 12, the air blowing portion 13, the cleaning tank 2, the exhaust air passage 16, and the communication air passage 19 is formed. Next, the control unit 11 performs dehumidification of the air in the cleaning tank 2 by the circulation operation without supplying the exhaust gas from the cleaning tank 2 via the circulation path.

At this time, as described above, as the drying step proceeds, when the humidity of the circulating air is lowered, the control unit 11 switches to the supply and exhaust operation to continue the drying step.

Specifically, as shown in FIG. 3B, the control unit 11 opens the exhaust air passage 16 by closing the damper passage 19 by switching the damper 26. At the same time, the second damper 23 provided to the air supply duct 12 is opened, and the air supply duct 12 is directed to the outside (for example, the basket Within body 1) open. Thereby, the supply and exhaust operation of supplying air to the outside air in the washing tank 2 is performed.

As described above, in the dish washing and drying machine of the present embodiment, when the circulation operation from the supply and exhaust of the cleaning tank 2 is not performed, the exhaust air passage 16 is closed by the switching damper 26, and the communication air passage 19 is opened. On the other hand, when the outside of the washing tank 2 (in the casing 1) and the supply and exhaust operation of the air supply and exhaust are performed, the communication air passage 19 is closed by the switching of the damper 26, and the exhaust air passage 16 is opened. In other words, the two air passages of the exhaust air passage 16 and the communication air passage 19 are switched, and the switching damper 26 can be switched between the circulation operation and the supply and exhaust operation. Thereby, the number of dampers and the driving source of the damper can be reduced. As a result, it is possible to realize a dishwasher cleaning and drying machine which is simple and highly reliable.

According to this configuration, in the drying step, dehumidification in the circulation operation is performed in the same manner as in the first embodiment. Next, when the efficiency of drying by the dehumidifying unit 20 is lowered, the air supply operation is performed to discharge the air in the washing tank 2 to the outside of the tank. Thereby, the efficiency of drying can be improved, and the drying time can be shortened.

Further, during the supply and exhaust operation, the relative humidity of the air in the cleaning tank 2 discharged is 100% or less. Therefore, even if the air in the washing tank 2 is exhausted into the casing 1, the adverse effect of dew condensation or the like can be reduced. Thereby, it is not necessary to provide an exhaust port in the door 3 before the dishwasher washing and drying machine. As a result, the decorative panel of the system kitchenware can be installed on the entire door 3 to improve the design.

In the present embodiment, the operation is performed by completely switching the cycle operation and the supply and exhaust operation, but the present invention is not limited thereto. For example, the opening degree of the switching damper 26 can be adjusted in the same manner as in the first embodiment, and the cycle operation and supply can be performed. The exhaust operation is running. Thereby, the occurrence of dew condensation in the casing 1 can be more reliably prevented.

(Embodiment 3)

Hereinafter, the configuration of the dish washing and drying machine in the third embodiment of the present invention will be described with reference to Figs. 4A and 4B.

Fig. 4 is a side cross-sectional view of an essential part showing a circulating operation state of the dish washing and drying machine in the third embodiment of the present invention. Fig. 4B is a side cross-sectional view showing an essential part of the air supply and exhaust operation state of the dishwasher cleaning and drying machine.

The dishwasher cleaning and drying machine of the present embodiment is different from the first embodiment or the second embodiment in that the first damper 22 to the third damper 24 are deleted, or the switching damper 26 and the second damper 23 are deleted, and one composite damper 27 is provided instead. . In other words, the composite damper 27 has the functions of the three dampers of the first damper 22 to the third damper 24 of the first embodiment, and the functions of the switching damper 26 and the second damper 23 of the second embodiment. Further, as shown in FIG. 4A and FIG. 4B, in order to provide the composite damper 27, the shape of the supply air passage 28 and the exhaust air passage 29 is changed as described below. However, the other configuration is the same as that described in the first embodiment or the second embodiment.

That is, as shown in FIG. 4A, the exhaust air passage 29 is provided by the exhaust side connecting portion 29a toward the door 3, for example, in a shape that is bent upward. On the other hand, the air supply passage 28 is provided adjacent to the exhaust side connecting portion 29a by the dam arrangement (here, the air supply port 30) of the first valve body 27a in which the composite damper 27 is disposed.

Further, the composite damper 27 can be opened by the first valve body 27a for opening and closing the air supply port 30 of the air supply air passage 28, and for opening and closing the connection air passage 19 and the exhaust air passage 29. The second valve body 27b and the rotating shaft 31 are configured. Then, the first valve body 27a and the second valve body 27b of the composite damper 27 are integrally formed at a predetermined angle, for example, in a U-shape centering on the rotation shaft 31. Further, the predetermined angle between the first valve body 27a and the second valve body 27b of the composite damper 27 corresponds to the angle of the closed surface when the supply air passage 28 and the exhaust air passage 29 shown in Fig. 4A are simultaneously closed during the circulation operation. . Further, the first valve body 27a of the composite damper 27 corresponds to the second damper 23 of the second embodiment, and the second valve body 27b of the composite damper 27 has a function corresponding to the switching damper 26 of the second embodiment.

Next, as shown in FIG. 4A, the composite damper 27 closes the air supply port 30 and closes the air supply port 30, closes the air supply air path 28, and closes the air supply path 19, while closing the exhaust air path 29. On the other hand, as shown in FIG. 4B, when the composite damper 27 closes the venting air passage 19, the exhaust air passage 29 is opened, and the air supply port 30 of the air supply air passage 28 is opened to open the air supply air passage 28. . At this time, the composite damper 27 is formed in a shape that is, for example, obliquely cut, so that the composite damper 27 can completely open the air supply port 30 of the supply air passage 28 when the exhaust air passage 29 is opened and the communication air passage 19 is closed.

According to the above, the dish washing and drying machine of this embodiment is constructed.

Hereinafter, the operation and action of the dish washing and drying machine of the present embodiment will be described with reference to Figs. 4A and 4B. In addition, the washing step and the rinsing step in which the dish washing and drying machine starts the operation are the same as in the above embodiments. Therefore, the following different drying steps are explained.

At the start of the drying step, as shown in FIG. 4A, the control unit 11 closes the exhaust air passage 29 by the composite damper 27, closes the air supply port 30, closes the air supply air passage 28, and opens the communication air passage 19. Thereby, the cleaning tank 2 is formed not A circulation path through which the air supply and exhaust duct 12, the air blowing unit 13, the cleaning tank 2, the exhaust air passage 16, and the communication air passage 19 are connected is provided. Next, the control unit 11 passes through the circulation path, and performs dehumidification of the air in the cleaning tank 2 by not performing the circulation operation of the supply and exhaust from the cleaning tank 2.

At this time, as described above, as the drying step progresses, when the humidity of the circulating air is lowered, the control unit 11 switches to the supply and exhaust operation, and continues the drying step.

Specifically, as shown in FIG. 4B, the control unit 11 closes the connection air passage 19 by the composite damper 27 and opens the exhaust air passage 29. At the same time, the air supply port 30 is opened by the composite damper 27 to open the air supply air passage 28. Thereby, the supply and exhaust operation of supplying the outside air is performed in the washing tank 2.

As described above, the dish washing and drying machine of the present embodiment is opened by closing the air supply passage 28 and the exhaust air passage 29 by the composite damper 27 when the circulation operation from the supply and exhaust of the cleaning tank 2 is not performed. Contact the wind road 19. On the other hand, when the supply and exhaust operation of the air supply and exhaust is performed outside the cleaning tank 2 (in the casing 1), the communication air passage 19 is closed by the composite damper 27, and the air supply air passage 28 and the exhaust air are opened. Road 29. In other words, by switching the three air passages of the air supply air passage 28, the communication air passage 19, and the exhaust air passage 29, one composite damper 27 can switch between the circulation operation and the supply and exhaust operation. Thereby, the number of dampers and the driving source of the damper can be further reduced. As a result, it is possible to realize a dish washing and drying machine having a simple and highly reliable damper.

According to this configuration, in the drying step, dehumidification in the circulation operation is performed in the same manner as in the first embodiment and the second embodiment. Next, when the efficiency of drying by the dehumidifying unit 20 is lowered, switching to the air supply and exhaust operation is performed in the cleaning tank 2 The air is discharged outside the tank. Thereby, the drying efficiency can be improved, and the drying time can be shortened.

Further, during the supply and exhaust operation, the relative humidity of the air in the cleaning tank 2 discharged is 100% or less. Therefore, even when the air in the washing tank 2 is exhausted into the casing 1, the adverse effects such as condensation can be reduced. Thereby, it is not necessary to provide an exhaust port in the door 3 before the dishwasher washing and drying machine. As a result, excellent design can be maintained in system kitchen utensils having a dishwashing and drying machine.

Further, in the present embodiment, the example in which the circulation operation and the supply and exhaust operation are completely switched is described, but the present invention is not limited thereto. For example, similarly to the first embodiment or the second embodiment, the opening degree of the composite damper 27 can be adjusted, and the operation can be performed by the circulation operation and the supply and exhaust operation. Thereby, the occurrence of dew condensation in the casing 1 can be more reliably prevented.

(Embodiment 4)

Hereinafter, the configuration of the dish washing and drying machine in the fourth embodiment of the present invention will be described with reference to Fig. 5 .

Fig. 5 is a side cross-sectional view showing a cycle operation state of the dishwasher of the fourth embodiment of the present invention.

The dish washing and drying machine of the present embodiment is different from the above-described embodiments in that the exhaust air passage 34 is provided on a wall surface different from the circulation path such as the rear portion of the washing tank 2, and is separated by the circulation path. The other configuration is basically the same as the configuration described in the first embodiment.

That is, as shown in FIG. 5, in the dish washing and drying machine of the present embodiment, the exhaust air path 34 is provided in the rear portion of the washing tank 2, and the out-of-slot exhaust port 40 of the exhaust air path 34 is provided in the casing 1. . Thereby, the cleaning tank 2 passes through the outer exhaust port 40 It is open to the outside (inside the casing 1).

Further, one of the connection air passages 32 is directly connected to the air outlet 38 of the cleaning tank 2, and the other is connected to the air supply side connecting portion 33a of the air supply air passage 33. Further, the connection air passage 32 is provided with a first damper 35 and a dehumidifying portion 20.

Further, the air supply duct 33 is provided with the second damper 36 in the same manner as in the first embodiment and the second embodiment. Further, a third damper 37 is provided in the exhaust air passage 34. The functions of the first damper 35, the second damper 36, and the third damper 37 provided in the air supply duct 32, the air supply duct 33, and the exhaust duct 34 are the same as those described in the first embodiment.

Specifically, as shown in FIG. 5, the control unit 11 adjusts the first damper 35 and the second damper 36 provided in the connection air passage 32, the supply air passage 33, and the exhaust air passage 34 during the drying step. The air blowing unit 13 is operated by opening and closing or opening of the third damper 37. Thereby, it is configured to switch the circulation operation in which the cleaning tank 2 and the connection air passage 32 form a circulation path without externally supplying and exhausting, and the supply and exhaust operation for restricting the circulation path and externally supplying and exhausting to perform Drying step.

According to this configuration, first, dehumidification of the circulation operation is performed in the drying step. Next, when the drying efficiency by the dehumidifying unit 20 is lowered, the air supply operation is performed to discharge the air in the washing tank 2 to the outside of the tank. Thereby, the drying efficiency can be improved and the drying time can be shortened.

Further, during the supply and exhaust operation, the relative humidity of the air in the cleaning tank 2 discharged is 100% or less. Therefore, even if the air in the washing tank 2 is exhausted into the casing 1, the adverse effects such as condensation can be reduced. Thereby, it is not necessary to provide an exhaust port in the door 3 before the dishwasher washing and drying machine. Washed and baked with utensils The system design of the dryer can maintain excellent design.

Further, in the present embodiment, the exhaust air passage 34 and the in-tank exhaust port 39 are provided at positions away from the supply air passage 33 in the rear portion of the washing tank 2. Therefore, during the circulation operation, the air convected in the cleaning tank 2 by the air blowing portion 13 is led to the connection air passage 32 from the outlet 38 of the front portion of the cleaning tank 2 along the flow indicated by the arrow mark A in FIG. . On the other hand, when switching to the air supply and exhaust operation, the air in the cleaning tank 2 is discharged to the casing 1 through the in-slot exhaust port 39 of the exhaust air passage 34 along the flow indicated by the arrow B in FIG. Inside. That is, when switching from the circulation operation to the supply and exhaust operation, the flow direction of the air flowing in the cleaning tank 2 is changed from the arrow mark A to the flow direction of the arrow symbol B. Thereby, the degree of progress of the drying of the laundry 4 in the washing tank 2 can be reduced. As a result, the entire object to be washed 4 can be efficiently dried.

In the present embodiment, the example in which the cycle operation and the supply and exhaust operation are completely switched is described. However, the present invention is not limited thereto. For example, similarly to the first embodiment, the opening degrees of the first damper 22, the second damper 23, and the third damper 24 are adjusted, and the amount of circulating air in the circulation path is restricted, and the operation is performed by the circulation operation and the supply and exhaust operation. Thereby, the occurrence of dew condensation in the casing 1 can be more reliably prevented.

As described above, the dish washing and drying machine of the present embodiment includes the supply air passage 33 and the exhaust air passage 34 which are provided on the wall surface different from the washing tank 2, and the communication washing tank 2 and the supply air passage 33. Connected to the wind road 32. The out-of-slot exhaust port 40 of the exhaust air passage 34 is provided in the casing 1. The connection air passage 32 is provided with the dehumidifying portion 20. Further, the first damper 35, the second damper 36, and the third damper 37 are provided in each of the air passages of the connection air passage 32, the air supply air passage 33, and the exhaust air passage 34. Then, control In the operation of the drying step, the preparation unit 11 adjusts the first damper 35, the second damper 36, and the third damper 37 provided in the connection air passage 32, the supply air passage 33, and the exhaust air passage 34 to cause the air blowing portion 13 action. Thereby, it is configured to switch the circulation operation in which the cleaning tank 2 and the connection air passage 32 form a circulation path without externally supplying and exhausting, and the supply and exhaust operation for restricting the circulation path and the external supply and exhaust, and performing baking Dry steps.

According to this configuration, first, in the drying step, dehumidification is performed in the circulation operation. Then, when the drying efficiency of the dehumidifying unit 20 is lowered, the air supply operation is performed to discharge the air in the cleaning tank 2 to the outside of the tank. Thereby, the efficiency of drying can be improved.

Further, during the supply and exhaust operation, the relative humidity of the air in the cleaning tank 2 discharged is 100% or less. Therefore, even if the air in the washing tank 2 is exhausted into the casing 1, there is no adverse effect such as condensation. Thereby, it is not necessary to provide the front door 3 with an exhaust port for exhausting the air in the washing tank 2. As a result, excellent design can be maintained.

In addition, when the exhaust air passage 34 is provided on the wall surface of the washing tank 2 different from the circulation path, and the switching operation is switched to the air supply and exhaust operation, the flow of the air in the washing tank 2 can be changed. Therefore, the unevenness of the degree of drying of the object 4 to be washed in the washing tank 2 can be reduced. Thereby, the entire laundry 4 can be dried.

Claims (4)

A dishwasher cleaning and drying machine, comprising at least a cleaning tank, a washing nozzle, a washing pump, a heating unit, and a control unit for controlling a series of washing operations, a washing step and a drying step in the basket; the washing tank Providing an air supply air passage, an exhaust air passage having an exhaust air outlet, and a connection air passage connecting the air supply side connecting portion of the air supply air passage and the exhaust side connecting portion of the exhaust air passage, and The connection air passage is provided with a dehumidifying portion for dehumidifying the air passing through the connecting air passage, and the air supply portion is provided with a blowing portion between the air supply side connecting portion and the cleaning tank, and the dishwasher cleaning and drying machine Further, the first damper that is disposed between the dehumidifying portion and the exhaust side connecting portion, and the first damper that is disposed outside the cleaning side of the air supply side connecting portion a damper and a third damper that is disposed on the exhaust air passage outside the washing tank than the exhaust side connecting portion that connects the exhaust air passage and the connecting air passage, and the exhaust air passage is outside the slot The exhaust port is disposed in the aforementioned casing, before opening In the case of the second damper, the air supply air passage is opened to the casing, and the control unit is configured to adjust the first damper, the second damper, and the third portion during the drying step The damper switches between a circulation path formed by the cleaning tank and the connection air passage, does not perform a circulation operation of supplying and exhausting outside the cleaning tank, and limits a circulating air amount of the circulation path to be outside the cleaning tank The supply and exhaust operation of the exhaust gas is performed to perform control. The dishwasher cleaning and drying machine according to claim 1, wherein the switching damper is provided in the exhaust side connecting portion instead of the first damper and the third damper, and the control unit is configured to close the collateral wind by the switching damper The road is opened to open the exhaust air passage, and the exhaust air passage is closed to open the communication air passage, thereby switching the cycle operation and the air supply and exhaust operation to perform control. A dishwashing and drying machine according to claim 1, wherein a composite damper is provided at the exhaust side connecting portion instead of the first damper, the second damper and the third damper, and the damper of the air supply air passage is provided The composite damper is provided adjacent to the exhaust side connecting portion, and the composite damper has a valve body that opens and closes the exhaust side connecting portion side integrally formed at a predetermined angle around a rotating shaft, and opens and closes the supply In the valve body on the air-air passage side, the control unit is configured to open the exhaust air passage by closing the exhaust air passage and the air supply air passage by the composite damper, and close the communication air passage to open the exhaust air passage The gas supply air passage is switched to the above-described circulation operation and the above-described supply and exhaust operation to perform control. A dishwasher cleaning and drying machine has at least a cleaning tank, a washing nozzle, a washing pump, a heating unit, and a control unit for controlling a series of washing steps, a rinsing step and a drying step, wherein The cleaning tank is provided with an air supply air passage, an exhaust air passage having an outer exhaust port, a connection air passage connecting the air supply side connecting portion of the air supply air passage and an outlet of the cleaning tank, and the connection The wind path is set to pass a dehumidifying unit for dehumidifying the air of the connecting air passage, wherein the air supply duct is provided between the air supply side connecting portion and the washing tank, and the air purifying unit is provided in the dehumidifying unit and a first damper that connects the connection air passage between the outlets, a second damper that is disposed on the air supply side of the air supply side connection portion, and a third damper that is provided in the exhaust air passage a damper in which the outer exhaust port of the exhaust air passage is provided in the casing, and when the second damper is opened, the air supply passage is opened to the casing, and the control unit is configured to In the operation of the drying step, by adjusting the first damper, the second damper, and the third damper, a cycle in which the circulation path is formed outside the cleaning tank and the connection air passage is not switched, and the circulation operation is performed. And controlling the amount of circulating air in the circulation path and controlling the supply and exhaust operation of the exhaust air through the exhaust air passage and the outside of the washing tank.