JPH0698849A - Dish washer - Google Patents

Abstract

PURPOSE:To avoid exhaust of hot airflow contg. moisture of a dish washer outside of the machine and to avoid adhesion of water dew and discharge of water drops around a vent. CONSTITUTION:A washing tank 2 wherein dishes are placed, an air fan 19 blowing hot air into the washing tank 2, a drying heater 22 heating circulation air, an outer frame heat exchanger 26 using the rear face 25a of the outer frame of the dish washer and a vertical face of the side face plate as cooling faces, and a circulation duct 29 circulating the hot air from the outer frame heat exchanger 26 to the air fan 19, are provided to cool and dehumidify the high temp. hot air contg. moisture caused by drying of dishes in the outer frame heat exchanger 26 with the open air. As water drops obtd. by cooling and dehumidifying flow easily down by making the cooling face of the heat exchanger vertical like this, dehumidifying characteristics is improved and drying of the dishes can be performed in a short time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher, and more particularly to a drying mechanism for a dishwasher.

[0002]

2. Description of the Related Art Conventionally, as a drying mechanism in a dishwasher, as described in, for example, Japanese Patent Application Laid-Open No. 2-124125, outside air is introduced into a washing tank by rotating a fan, and a heater is energized to heat the outside air. Then, hot air is blown onto the dishes arranged in the washing tank to dry the dishes. Then, the hot air containing moisture after being used for the drying process is configured to be discharged to the outside of the machine through an exhaust port provided in the upper part of the cleaning tank.

[0003]

In the above-mentioned prior art, since hot air containing moisture after the tableware is dried is exhausted from the exhaust port to the outside of the machine, the hot air near the exhaust port of the dishwasher is discharged. If hot air containing moisture, i.e., high-temperature steam, causes discomfort to a person, or if a dishwasher is installed in the system kitchen, the height of the exhaust port is just the position of the child's hand or face. However, there is a risk of burns due to high temperature steam. Further, there is a problem that dew adheres to the parts near the exhaust port of the dishwasher as the exhaust air is cooled by the outside air, and the water droplets flow down on the front surface of the dishwasher.

The object of the present invention is to solve the above-mentioned problems of the prior art. It is possible to eliminate the exhaust of the dishwasher from the outside and to cook in the kitchen where the dishwasher is installed. The purpose of this is to prevent hot water from being sprayed on a person who is wearing it and to prevent dew or water droplets from flowing out near the exhaust port of the dishwasher.

[0005]

The dishwasher of the present invention comprises:
In order to achieve the above object, an outer frame heat exchanger having cooling surfaces on the outer frame back surface and outer frame side surface of the dishwasher is provided,
In the washing tank, the hot air containing moisture is introduced into the outer frame heat exchanger by drying the dishes, the hot air is cooled and dehumidified, and the dehumidified air is removed.
The configuration will lead to the fans again.

Further, in the present invention, as a means corresponding to the case where the dishwasher is incorporated in the system kitchen, an outer frame heat exchanger having a vertical surface on the back surface of the outer frame as a cooling surface,
A cooling fan and a cooling duct for blowing outside air are provided between the rear surface of the outer frame and the inner side surface of the system kitchen facing each other.

Further, in the present invention, a cooling air exhaust duct for exhausting the outside air cooled by the outer frame heat exchanger to the outside of the machine is provided.
It is configured to connect to the water distribution pipe that drains the washing water and rinsing water of the dishwasher.

Further, in the present invention, a hot air is blown between a fan, a heater, and a fan for blowing hot air to the cleaning tank, with an outer frame heat exchanger having a cooling surface which is a vertical surface on the back of the outer frame of the dishwasher. A hot air switching valve that switches between a cleaning tank, an outer frame heat exchanger, and a circulation method to the fan again and an exhaust method that exhausts hot air to the outside of the dishwasher is provided.

[0009]

The tableware stored in the washing tank is dried by heating the air blown to the washing tank by the fan with the heater to make hot air, and blowing the hot air to the tableware to evaporate the water on the surface of the tableware. And the hot air that is moist with evaporated water is
The dishwasher is guided to an outer frame heat exchanger whose cooling surface is the vertical surface on the backside of the outer frame, and is cooled by the outside air on this cooling surface to be condensed and dehumidified. The dehumidified air is guided to a fan and a fan casing that blow hot air into the cleaning tank, heated again by the heater, and then circulated to the cleaning tank. In this way, the tableware is dried by repeating the evaporation of water from the surface of the tableware by the contact between the tableware and hot air in the washing tank and the cooling and dehumidification on the vertical surface of the outer frame back surface of the outer frame heat exchanger. .

As a result, hot air containing moisture, that is, hot steam, is not discharged from the exhaust port of the dishwasher to the outside of the dishwasher, and hot air is blown to a person in front of the dishwasher in the kitchen to feel uncomfortable. Can be prevented, and the risk of burns etc. is eliminated. In addition, the dew formed by cooling the exhaust air with the outside air does not adhere to the vicinity of the exhaust port of the dishwasher, and water droplets do not flow out on the front surface of the dishwasher.

Further, since the vertical surface on the back surface of the outer frame is used as a cooling surface, the dehumidifying water droplets attached to the cooling surface can easily flow down on the vertical surface to improve the dehumidifying performance, and to speed up the drying of the dishes accordingly. it can. Further, since the back surface and the vertical surfaces of the side surfaces of the outer frame are shared by the cooling surface of the heat exchanger, the cost can be reduced as compared with the case where a separate heat exchanger is provided.

Further, when the dishwasher is incorporated in the system kitchen, an outer frame heat exchanger whose cooling surface is a vertical surface of the outer frame back surface is cooled by a cooling fan, and an inner side surface of the system kitchen facing the back surface of the outer frame. In the meantime, since the outside air is blown, the cooling capacity of the outer frame heat exchanger is improved and the dehumidification performance is improved.
The dishes can be dried in a short time.

Further, the cooling exhaust duct provided on the cooling side of the outer frame heat exchanger on the rear surface of the outer frame is connected to a drain hose for draining washing water and rinsing water of the dishwasher, thereby exchanging heat with the outside air. Do not exhaust hot air from the front of the dishwasher after cooling the vessel. This eliminates the discomfort of people in the vicinity of the dishwasher.

Further, a hot air switching valve is provided between the outer frame heat exchanger on the rear surface of the outer frame and a fan for blowing hot air to the cleaning tank, and the hot air is supplied to the fan, the heater, the cleaning tank during the drying process.
It circulates to the outer heat exchanger and the fan again. Then, after the drying process is completed, the switching valve is opened for the exhaust system for a certain time. That is, the space between the outer frame heat exchanger and the fan is opened so that the outside air is blown from the fan to the cleaning tank. On the other hand, the hot air from the outer frame heat exchanger is to be removed from the machine. As a result, the dehumidified water droplets adhering to the cooling surface of the outer frame heat exchanger can be evaporated and exhausted,
During the next tableware drying, cooling and dehumidification in the outer frame heat exchanger can be performed quickly. Further, since no dehumidified water drops remain in the outer frame heat exchanger, it becomes hygienic.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view showing the overall construction of the dishwasher according to the first embodiment of the present invention. In FIG.
1 is an outer frame body of the dishwasher, 2 is a washing tank provided inside the outer frame body 1, 3 and 4 are dish baskets stored in the washing bath 2 so that they can be pulled out, and 5 and 6 are dish baskets 3 Tableware arranged in 4 and 4, 7 is a washing motor for driving a washing pump 8,
Is a cleaning pump, 9 is an injection nozzle provided in the lower part of the cleaning tank 2, 10 is an injection port of the injection nozzle 9, 11 is an injection nozzle provided in the upper part of the cleaning tank 2, 12 is an injection port of the injection nozzle 11, and 13 is The cleaning water from the cleaning pump 8 is injected into the nozzle 11
To the water supply tower, 14 is a wash water receiver for storing wash water, 15 is a wash water heater for heating the wash water, 16 is a heater tank surrounding the wash water heater 15, 17 is a washing pump connected to the heater tank 16 A pump casing that surrounds the
An opening / closing door 8 is provided on the front surface of the cleaning tank 2. 19 is a blower fan for blowing hot air to the cleaning tank 2, 20 is a fan casing surrounding the blower fan 21, 21 is a heater duct connected to the fan casing 20, 22 is a drying heater installed in the heater duct 21, and 23 is Hot air blowing duct that connects the heater duct 21 to the cleaning tank 2, 2
Reference numeral 4 denotes a hot air blowing port provided below the cleaning tank 2. 25
Reference numeral a is an outer frame rear surface plate which is a vertical surface of the outer frame main body 1, and 25b is an outer frame rear surface duct plate provided in parallel with the outer frame rear surface plate 25a. Reference numeral 26 denotes an outer frame rear surface plate 25a and an outer frame rear surface duct plate 25b.
It is an outer frame heat exchanger constituted by the outer frame back plate 25a as a cooling surface. 27 is a cleaning tank exhaust port provided above the cleaning tank 2, 28 is an exhaust duct connecting the cleaning tank exhaust port 27 to the outer frame rear surface duct plate 25b, and 29 is an outer frame rear surface duct plate of the outer frame heat exchanger 26. 25b to fan casing 2
A circulation duct connecting up to 0, 30 is a dehumidifying water receiver for storing water droplets that have been cooled and dehumidified by the outer frame back plate 25a of the outer frame heat exchanger, 31 is a dehumidifying water receiver 30 and a heater tank 16 for the washing water. It is a connected drain hose.

Next, the operation of the first embodiment will be described. The dishwasher of this embodiment performs washing, rinsing and drying of dishes. To wash the dishes, the dishes 5 and 6 are first placed in the dish baskets 3 and 4. The tableware baskets 3 and 4 are pulled out from the cleaning tank 2 by tilting the door 18 toward the front, the tablewares 5 and 6 are arranged in the tableware baskets 3 and 4, and then pushed into the cleaning tank 2. And the door 18
Close. Next, pour cleaning water into the heater tank 16,
At the same time, add dish detergent. Then, the heater 15 is energized to heat the cleaning water stored in the heater tank 16. Subsequently, the cleaning motor 7 drives the cleaning pump 8 to supply the cleaning water in the heater tank 16 to the spray nozzles 9 and 11 by applying pressure. Wash water having high pressure as hot water is sprayed from the spray nozzle 9 and the spray nozzle 11 and sprayed on the dishes 5 and 6 to wash the dishes. Rinse
After draining the washing water from the drain hose 31, rinse water is poured into the heater tank 16 again, and the rinse water is heated by the heater 15 to become warm water. Then, the hot water is sprayed from the spray nozzle 9 and the spray nozzle 11 onto the dishes 5 and 6 by the cleaning pump 8. When the rinsing is finished, the rinsing water is drained and then the drying is performed.

Next, the drying will be described. Drying is performed by energizing the drying heater 22 and rotating the blower fan 19. When the blower fan 19 is rotated, the air is blown from the fan casing 20 to the heater duct 21 and heated by the drying heater 22 to become hot hot air. The hot air is blown from the heater duct 21 through the blower duct 23 and from the blower port 24 into the cleaning tank 2. The drying flows from the lower side to the upper side in the cleaning tank 2 from the blower port 24 toward the exhaust port 27 as shown by the arrow in the cleaning tank 2. The hot air comes into contact with the dishes 5 and 6 to evaporate the water on the surface of the dishes. The moist hot air that has absorbed the water is exhausted through the exhaust port 2
7 through the exhaust duct 28 to the outer frame heat exchanger 26
Be blown to. The moist hot air is cooled by the outside air and dehumidified by the outer frame back plate 25b of the outer frame heat exchanger 26. The heat transfer of cooling by the outside air is natural convection heat transfer on the outside air side of the outer frame back plate 25a, and forced convection heat transfer by hot air on the inner side surface of the outer frame. The dehumidified water droplet A is the outer frame back plate 2
It adheres to the inner surface of 5a. When the water drops become large, the dehumidified water drops flow out by connecting to the vertical surface of the outer frame back plate 25a. The dehumidified water is collected in the dehumidified water receiver 30, and then discharged from the machine through the drain hose 31. The cooled and dehumidified air passes through the circulation duct 29 and is circulated again in the blower fan 19 and the fan casing 20.

As described above, according to the first embodiment, the tableware is dried by evaporating the water from the surface of the tableware due to the contact between the tableware 5 and 6 and the hot air in the washing tank 2 and the outer frame heat exchanger 26. This is performed by repeatedly cooling and dehumidifying the outside frame back plate 25a by cooling the outside air, and the water attached to the dishes is treated in the dishwasher. Therefore, hot air containing moisture will not be discharged from the dishwasher to the outside of the dishwasher, and it will be possible to prevent the person in front of the dishwasher in the kitchen from being blown with hot hot air to cause discomfort, and to avoid the risk of burns. It also has the effect of disappearing. Further, the exhaust gas is cooled by the outside air and dew adheres to the vicinity of the exhaust port of the dishwasher, so that the water droplets do not flow out. Further, since the vertical surface of the outer frame back surface plate 25a is used as the heat exchanger cooling surface for cooling and dehumidifying, the dehumidified water droplets attached to the cooling surface easily flow down the vertical surface, so that the outer frame heat exchange is performed. The dehumidifying performance of the container 26 is improved,
That is the effect that the dishes can be dried faster. Further, since the outer frame is shared with the cooling surface of the heat exchanger, there is an effect that the cost can be reduced as compared with the case where the heat exchanger is separately provided.

FIG. 2 shows an embodiment in which not only the back surface of the outer frame but also the vertical surface of the side surface of the outer frame is used as the cooling surface of the heat exchanger.

In FIG. 2, 25a is an outer frame back plate which is a vertical surface of the outer frame heat exchanger 26 shown in FIG. 1, 32 is an outer frame side plate which is a vertical surface of the outer frame, and 33 is a vertical surface of the outer frame. It is the other outer frame side plate that is a surface. 27 is the exhaust port of the cleaning tank shown in FIG.
Reference numerals 28a, 28b and 28c are exhaust ducts divided from the exhaust port 27 in three directions. 28 a connects the exhaust port 27 and the outer frame back plate 25 a of the outer frame heat exchanger 26.
Similarly, 28b connects the exhaust port 27 and the outer frame side plate 32 of the outer frame heat exchanger 26. Further, 28c connects the exhaust port 27 and the outer frame side plate 33 of the outer frame heat exchanger 26. 29 is the circulation duct shown in FIG. 1, 35a, 3
Reference numerals 5b and 35c are circulation ducts divided from the circulation duct 29 in three directions. 35a is connected to the outer frame back plate 25a of the outer frame heat exchanger 26, 35b is connected to the outer frame side plate 32 of the outer frame heat exchanger 26, and 35c is the outer frame heat exchanger 26. Is connected to the outer frame side plate 33. Three
4a, 34b, 34c are exhaust ducts 28a, 28b,
28 c is a hot air inlet to the outer frame back plate 25 a, outer frame side plate 32, and outer frame side plate 33 of the outer frame heat exchanger 26.

The operation will be described. Exhaust port 2 of cleaning tank 2
The hot air coming out of 7 is exhaust duct 28 divided into 3 directions.
It is divided into a, 28b, and 28c and flows into the outer frame back plate 25a, the outer frame side plate 32, and the outer frame side plate 33 of the outer frame heat exchanger 26. The hot air flows in the a direction along the vertical surface of the outer frame back plate 25a, in the b direction along the vertical surface of the outer frame side plate 32, and further along the vertical surface of the outer frame side plate 33 in the c direction. Flow in the direction. During this time, the hot air is applied to the outer frame back plate 25a of the outer frame heat exchanger 26, the outer frame side plate 32, and the outer frame side plate 33.
Then, it is cooled and dehumidified by the outside air. The cooled and dehumidified air flows into the three circulation ducts 35a, 35b, 35c from the inflow ports 36a, 36b, 36c, is collected and flows into the circulation duct 29, and again, the blower fan 19 and the fan casing 20 in FIG. Returned to.

According to the embodiment of FIG. 2, the cooling surfaces of the outer frame heat exchanger are the outer frame back plate 25a, the outer frame side plate 32, and the outer frame side plate 33. Outer frame back plate 2
Since it can be increased to about 3 times that of 5a alone,
There is an effect that the dehumidification performance on the cooling surface of the heat exchanger is improved and the dishes can be dried in a short time.

FIG. 3 is a side sectional view of the dishwasher according to the second embodiment of the present invention, in which the dishwasher is incorporated in the system kitchen.

In FIG. 3, 26 is the outer frame heat exchanger shown in FIG. 1, 25a is an outer frame back plate which is a vertical surface of the outer frame heat exchanger 26, and 25b is provided in parallel with the outer frame back plate 25a. The outer frame back side duct plate, 28 is an exhaust duct connecting the cleaning tank exhaust port 27 to the outer frame back side duct plate 25b, and 29 is the outer frame back side duct plate 25b of the outer frame heat exchanger 26 connected to the fan casing 20. And 21 are heater ducts connected to the fan casing 20, and 23 is a hot air blowing duct that connects the heater duct 21 to the cleaning tank 2. 37 is a cooling fan for cooling the outer frame heat exchanger 26, 38 is a fan casing of the cooling fan 37, 39
Is a cooling air intake duct connecting the air inlet of the fan casing 38 and the cooling air inlet 39a provided in the front of the dishwasher, and 40 is the fan casing 38 and the outer frame rear plate 25
cooling air inflow duct for connecting with a, 41 is the outer frame back plate 2
5a and cooling air outlet 41b provided on the front of the dishwasher
It is a cooling air exhaust duct that connects with. Reference numeral 42 denotes a back surface of the system kitchen, which is a wall surface close to the outer frame back plate 25a of the outer frame heat exchanger 26 when the dishwasher is incorporated in the system kitchen. Reference numeral 44 is a top plate of the system kitchen, and 45 is a bottom plate of the system kitchen. Reference numeral 43 is a partition member for forming a cooling air passage in the space between the outer frame back plate 25a and the inner side surface 42 of the system kitchen.

FIG. 4 shows the structure of the cooling fan 37.
In FIG. 4, 37 is the cooling fan shown in FIG. 3, 38 is a fan casing of the cooling fan 37, 39 is a cooling air intake duct,
40 is a cooling air inflow duct. Reference numeral 19 is a hot air blowing fan shown in FIG. 1, 20 is a fan casing of the blowing fan 19, 21 is a heater duct, and 29 is a circulation duct.
46 is a drying motor that rotates both the blower fan 19 and the cooling fan 37, and 47 and 48 are rotation shafts of the drying motor 46. The blower fan 19 and the cooling fan 37 are attached to 47 and 48. 49 and 50 are fixed holders for fixing the drying motor 46, the blower fan 19 and the cooling fan 37 to the lower surface 1a of the outer frame body of the dishwasher.

Next, the operation of the second embodiment will be described. This embodiment operates in the tableware drying process. When the washing and rinsing of the dishes in FIG. 1 are completed and the drying process is started, the drying heater 22 of FIG. 1 is energized and the drying motor 46 of FIG. 4 is driven. The blower fan 19 and the cooling fan 37 rotate together by driving the motor 46. The air from the blower fan 19 is blown from the fan casing 20 to the heater duct 21, and is heated by the drying heater 22 to become high-temperature hot air. This hot air flows from the heater duct 21 to the blower duct 23.
And is blown to the cleaning tank 2. The hot air comes into contact with the dishes 5 and 6 to dry the dishes. The hot air that has absorbed the moisture and becomes moist passes through the exhaust duct 28 and the outer frame heat exchanger 26.
Flow into the outer frame back surface plate 25a and outer frame back surface duct plate 25b
Flowing through. On the other hand, as for the cooling air, the outside air is sucked by the cooling fan 37 from the cooling air intake duct 39 of FIG. 3, flows into the cooling fan casing 38, further passes through the cooling air inflow duct 40, and passes through the outer frame of the outer frame heat exchanger 26. Back plate 25
It flows into the cooling air passage between a and the back side 42 of the system kitchen. Then, it passes through the cooling air discharge duct 41 and is discharged from the discharge port 41b on the front surface of the dishwasher.

The moist hot air that has flowed into the outer frame heat exchanger 26 is transferred to the back side plate 25a of the outer frame by the outer side back plate 25a.
It is cooled and dehumidified by the cooling air flowing between the two.
The air after cooling and dehumidifying passes through the circulation duct 29 and is again shown in FIG.
It is returned to the blower fan 19 and is used as hot air for drying after being heated.

As described above, according to the second embodiment, when the dishwasher is installed in the system kitchen, the cooling fan 37 is used to cool the outer frame back plate 25a of the outer frame heat exchanger 26 and the inner side surface of the system kitchen. By sending the cooling air of the outside air to and from 42, the cooling and dehumidifying performance in the outer frame heat exchanger 26 is improved. Thereby, there is an effect that the dishes in the washing tank can be dried in a short time.

FIG. 5 is a side sectional view of the dishwasher according to the third embodiment of the present invention.

The symbols 1 to 29 in FIG. 5 correspond to the symbols in FIG. In FIG. 5, 1 is an outer frame body of the dishwasher, 7 is a washing motor for rotating the washing pump 8, 8 is a washing pump, and 15
Is a cleaning water heater for heating the cleaning water, 16 is a heater tank surrounding the cleaning water heater 15, 17 is a pump casing surrounding the cleaning pump 8, and 25a is an outer frame of the outer frame heat exchanger which is a vertical surface of the outer frame body 1. A back plate, 25b is an outer frame back duct plate provided in parallel with the outer frame back plate 25a, 28 is an exhaust duct connecting the cleaning tank to the outer frame back duct plate 25b, 29
Is a circulation duct connecting the outer frame back surface duct plate 25b of the outer frame heat exchanger 26 to the fan casing 20. As shown in FIG. 3, 37 to 44 are cooling fans for cooling the outer frame back plate 25a of the outer frame heat exchanger 26, 38 is a fan casing of the cooling fan 37, 39 is a cooling air intake duct, and Reference numeral 40 is a cooling air inflow duct, 42 is a rear side surface of the system kitchen, 43 is a partition member for forming a cooling air passage provided on the outer frame back plate 25a, 44 is a top plate of the system kitchen, and 44 is a system kitchen. It is a bottom plate. Reference numeral 51 is a cooling air passage guide plate provided on the outer frame rear surface plate 25a, 52 is a cooling air exhaust duct provided on the outer frame rear surface plate 25a, and 52a is an exhaust port thereof. 53 is a wash water drain pipe connected to the heater tank 16 and the pump casing 17, 54 is an opening / closing valve for storing the wash water in the heater tank 16, and 55 is a wash water drain hose. The cooling air exhaust duct 52 is connected to the drain hose 55. FIG. 6 is a perspective view showing the cooling air passage guide plate 51 of FIG. 5 in detail. In FIG. 6, the cooling air passage guide plate 51
Is provided in a central portion on the outer side of the outer frame back plate 25a and is cut out at the upper side.

Next, the operation of the third embodiment will be described. This embodiment operates in the tableware drying process. When the washing and rinsing of the dishes in FIG. 1 are completed and the drying process is started, the drying heater 22 of FIG. 1 is energized and the drying motor 46 of FIG. 4 is driven. The blower fan 19 and the cooling fan 37 rotate together by driving the motor 46. The air from the blower fan 19 is blown from the fan casing 20 to the heater duct 21, and is heated by the drying heater 22 to become high-temperature hot air. This hot air flows from the heater duct 21 to the blower duct 23.
And is blown to the cleaning tank 2. The hot air comes into contact with the dishes 5 and 6 to dry the dishes. The hot air that has absorbed the moisture and becomes moist passes through the exhaust duct 28 and the outer frame heat exchanger 26.
Flow into the outer frame back surface plate 25a and outer frame back surface duct plate 25b
Flowing through. On the other hand, as for the cooling air, in FIG. 5, the outside air is sucked from the cooling air intake duct 39 by the cooling fan 37, flows into the cooling fan casing 38, and further passes through the cooling air inflow duct 40 to the outside of the outer frame heat exchanger 26. It flows into the cooling air passage between the frame back plate 25a and the back side surface 42 of the system kitchen. Then, as shown in FIG. 6, the cooling air flows from the inlet 40a of the cooling air inflow duct 40 to the cooling air passage guide plate 51 in the cooling air passage between the outer frame back plate 25a and the inner side surface 42 of the system kitchen. Inflow to the left.
Then, after making a U-turn through the upper cutout portion of the cooling air duct guide plate 51 and flowing to the right side of the cooling air duct guide plate 51, it exits from the exhaust port 52a and flows into the cooling air exhaust duct 52. Then, in FIG. 5, the cooling air flowing into the discharge duct 52 is discharged to the outside of the machine through the drain hose 55.

Further, in FIG. 5, the damp hot air that has flowed into the outer frame heat exchanger 26 after the dishes are dried is cooled by the cooling air that flows between the outer frame back plate 25a and the inner side surface 42 of the system kitchen. Dehumidified. The cooled and dehumidified air passes through the circulation duct 29 and is returned to the blower fan 19 of FIG. 1 again, and after being heated, is used as hot air for drying.

As described above, according to the third embodiment, the cooling air exhaust duct 52 is connected to the drain hose 55 for draining the wash water and the rinse water, so that the outer frame heat exchanger 26 is connected.
The hot air that has been dehumidified by cooling the moist hot air after drying the dishes with
Exhaust out of the machine from the drain hose 55. As a result, the hot cooling air that has passed through the outer frame heat exchanger 26 is not exhausted from the front of the dishwasher, so that there is an effect that it is possible to prevent the hot cooling air from being blown to a person in the vicinity of the dishwasher.

FIG. 7 is a side sectional view of the dishwasher according to the fourth embodiment of the present invention. Symbols 1 to 29 in FIG. 7 correspond to the symbols in FIG. In FIG. 7, 53 is a switching valve body for circulating air provided between the circulation duct 29 and the fan casing 20 of the blower fan 19, 54 is a fan casing duct that connects the switching valve body 53 to the fan casing 20, and 56 is a switch. An air switching valve that rotates around a valve rotation shaft 55 in the valve body 53, and 57 is an air suction duct that is attached to the switching valve body 53 on the opposite side of the circulation duct 29 and has an outside air intake port provided on the front surface of the dishwasher. , 58 is an air exhaust duct which is attached to the switching valve main body 53 on the opposite side of the fan casing duct 54 and whose exhaust port is provided on the lower surface of the outer frame.
Reference numeral 56a indicated by a broken line indicates the valve rotation shaft 5 in the switching valve body 53.
This is the position after the switching operation of the air switching valve 56 that rotates around 5.

Next, the operation of the fourth embodiment of the present invention will be described.

This embodiment operates after the dishes have been washed, rinsed and dried. In the drying process in FIG. 7, the air switching valve 56 is in the position shown by the solid line. The tableware is dried by blowing hot air heated by the drying heater 22 by the blower fan 19 into the cleaning tank 2 to dry the tableware 5, 6. The dried hot moist air flows into the outer frame heat exchanger 26 through the exhaust duct 28, and is cooled and dehumidified by the outer air at the outer frame back plate 25a.

In FIG. 7, since the air switching valve 56 is at the position shown by the solid line, the air cooled and dehumidified by the outer frame back plate 25a of the outer frame heat exchanger 26 passes through the circulation duct 29 and is then air switched. It flows in the direction of the solid arrow B in the valve 56 and circulates to the blower fan 19 again.

When the drying is completed, the energization of the drying heater 22 is stopped and the air switching valve 56 is switched to the position 56a shown by the broken line. The switching time is 10 to 30 minutes, and the air switching valve 56 is returned to the position shown by the solid line in the next tableware drying.

When the air switching valve 56 shown in FIG. 7 is located at the broken line 56a, the blower fan 19 causes the outside air to flow into the air intake duct 5
Inhaled to 7. The outside air flows in the direction of the dashed arrow C by the air switching valve 56, and the fan casing duct 5
4, the blower fan 19 and the fan casing 20.
Flow into. The outside air from the blower fan 19 is the drying heater 2
Since 2 is not energized, it flows into the cleaning tank 2 through the heater duct 21 and the blower duct 23 without being heated. In the washing tank 2, the humidity of the outside air is lower than when the hot air in the drying step is circulated, so that the surface of the tableware is further dried. The outside air is the exhaust port 2 above the cleaning tank 2.
After passing through the exhaust duct 28, it flows into the outer frame heat exchanger 26. The outside air flowing into the outer frame heat exchanger 26 is
The dehumidified water droplets A remaining on the inner surface of the outer frame rear surface plate 25a of the outer frame heat exchanger 26 are evaporated and dried. The outside air from which the dehumidified water droplets have evaporated passes through the circulation duct 29, then flows in the direction of the broken arrow D of the air switching valve 56, and is discharged out of the machine from the lower portion of the outer frame.

As described above, according to the fourth embodiment, the air switching valve 56 is provided between the outer frame heat exchanger 26 and the blower fan 19 so that the air is left for a certain period of time after the tableware drying process is completed. The switching valve 56 is opened to blow the outside air to the cleaning tank 2 and the outer frame heat exchanger 26. With the outside air, the outer frame heat exchanger 2
Since the dehumidified water droplets remaining in 6 are evaporated and exhausted to the outside of the dishwasher through the switching valve 56, the outer frame heat exchanger 26
No dehumidified water drops remain on the. As a result, at the time of the next tableware drying, the cooling and dehumidification in the outer frame heat exchanger 26 can be quickly performed, and the tableware can be dried in a short time. Further, since no dehumidified water droplets remain on the outer frame heat exchanger 26, it becomes hygienic. Further, since the dishes in the washing tank 2 are dried again by the sucked low-humidity outside air, the dishes can be dried more completely than only by the circulating hot air.

[0042]

According to the present invention, in the drying of tableware,
The damp hot air absorbed by evaporating the water on the surface of the tableware is cooled and dehumidified by the outside air in the outer frame heat exchanger with the outer frame back surface and the outer frame side surface, which are vertical surfaces of the outer frame, as cooling surfaces. It is possible to prevent the contained hot air from being discharged to the outside of the dishwasher, prevent the person in front of the dishwasher from being discomforted by blowing hot hot air, and have the effect of eliminating the risk of burns. In addition, the exhaust gas is cooled near the exhaust port of the dishwasher so that dew adheres to the exhaust port, so that it does not flow out in front of the dishwasher. Furthermore, since the back surface of the outer frame and the vertical surface of the outer frame side are used as the cooling surface of the outer frame heat exchanger for cooling and dehumidifying, the dehumidified water droplets attached to the cooling surface easily flow down the vertical surface, so the outer frame The cooling and dehumidifying performance in the heat exchanger is improved, and the dishes can be dried in a short time. Further, since the back surface and the side surface of the outer frame are shared as the cooling surface of the outer frame heat exchanger, there is an effect that the cost of the dishwasher can be reduced.

Further, according to the present invention, when the dishwasher is incorporated into the system kitchen, the cooling fan blows the outside air cooling air between the rear surface of the outer frame heat exchanger and the inner side surface of the system kitchen. By doing so, there is an effect that the cooling and dehumidifying performance in the outer frame heat exchanger is improved and the dishes can be dried in a short time.

Further, according to the present invention, an air switching valve is provided between the outer frame heat exchanger and the blower fan, and after the tableware drying process is completed, the air switching valve is opened for a certain period of time for cleaning. The outside air is blown to the tank and the outer frame heat exchanger. With that outside air,
The dehumidified water droplets remaining in the outer frame heat exchanger are evaporated and discharged to the outside of the dishwasher, so no dehumidified water droplets remain in the outer frame heat exchanger. Therefore, when the next tableware is dried, the cooling and dehumidification in the outer frame heat exchanger can be quickly performed, and the tableware can be dried in a short time. Further, since no dehumidified water drops remain on the outer frame heat exchanger, it becomes hygienic. Further, since the dishes in the washing tank are dried again by the inhaled low-humidity outside air, there is an effect that the dishes can be dried more completely than only by the circulating hot air.

[0045]

[Brief description of drawings]

FIG. 1 is a side sectional view showing an overall configuration of a dishwasher according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the configuration of an outer frame heat exchanger according to the first embodiment of the present invention.

FIG. 3 is a side sectional view of a dishwasher according to a second embodiment of the present invention.

FIG. 4 is a sectional view showing the structure of a cooling fan according to a second embodiment of the present invention.

FIG. 5 is a side sectional view of the dishwasher according to the third embodiment of the present invention.

FIG. 6 is a perspective view showing a cooling air passage configuration according to a third embodiment of the present invention.

FIG. 7 is a side sectional view showing the overall structure of the dishwasher according to the fourth embodiment of the present invention.

[Explanation of symbols]

1 ... Outer frame body, 2 ... Washing tank, 3, 4 ... Tableware basket, 5, 6
… Tableware, 7… Washing motor, 8… Washing pump, 9,11…
Injection nozzle, 15 ... Wash water heater, 19 ... Blower fan,
20 ... Fan casing, 21 ... Heater duct, 22 ...
Drying heater, 23 ... Blower duct, 24 ... Blower opening, 25
a ... Outer frame back plate of outer frame heat exchanger, 25b ... Outer frame back surface duct plate of outer frame heat exchanger, 26 ... Outer frame heat exchanger, 27 ... Cleaning tank exhaust port, 28 ... Exhaust duct, 28a, 28b , 28c
... Exhaust ducts that have been divided, 29 ... Circulation duct, 30 ... Dehumidified water receiver, 31 ... Drain hose, 32, 33 ... Outer frame side plate, 3
5a, 35b, 35c ... Divided circulation duct, 37 ... Cooling fan, 38 ... Cooling fan casing, 39 ... Cooling intake duct, 40 ... Cooling air inflow duct, 41 ... Cooling air discharge duct, 42 ... Back side of system kitchen , 43 ... Cooling air passage partitioning member, 46 ... Drying motor, 51 ... Cooling air passage guide plate, 52 ... Cooling air discharge duct, 53 ... Switching valve main body, 54 ... Casing duct, 56 ... Air switching valve, 5
6a ... Air switching valve when switching to the exhaust system, 57
… Air intake duct, 58… Air exhaust duct

Claims (4)

[Claims] 1. A washing tank in which dishes are arranged side by side, a means for spraying washing water on the dishes, a heater for heating air for drying the washed dishes, and hot air heated by the heater is blown to the washing tank. In a dishwasher equipped with a fan, the outer frame back and outer frame vertical surfaces of the dishwasher, the outer frame heat exchanger as a cooling surface for cooling and dehumidifying the hot air moistened by drying the dishes by the outside air, and A dishwasher provided with a circulation duct for returning the hot air cooled and dehumidified by the outer frame heat exchanger to the fan again. 2. A washing tank in which dishes are arranged side by side, a means for spraying washing water on the dishes, a heater for heating air for drying the washed dishes, and hot air heated by the heater is blown to the washing tank. The fan and the outer surface of the dishwasher, the outer surface of the outer surface of the outer surface of the outer surface of the outer surface of the dishwasher, are used as cooling surfaces for cooling and dehumidifying the hot air moistened by drying the dishes, and the air dehumidified by the outer material of the outer frame. In a dishwasher equipped with a circulation duct that returns the fan to the fan again, when the dishwasher is incorporated in the system kitchen, between the back side of the outer frame heat exchanger and the back side of the system kitchen facing it. A cooling fan that blows the outside air into the cooling air passage, a cooling air intake duct that guides the outside air to the cooling fan, and the cooling air passage between the cooling fan and the back side of the outer frame and the back side of the system kitchen. A cooling air ventilation duct and a cooling air exhaust duct for exhausting the cooling air from the cooling air passage between the back surface of the outer frame and the inner side surface of the system kitchen to the outside of the dishwasher are provided. Dishwasher to do. 3. The cooling air exhaust according to claim 2, wherein the cooling air is exhausted to the outside of the dishwasher from the cooling air passage between the rear surface of the outer frame heat exchanger and the inner side surface of the system kitchen. A dishwasher characterized in that the duct is connected to a drainage pipe for draining washing water and rinsing water of the dishwasher. 4. A washing tank in which dishes are arranged side by side, a means for spraying washing water on the dishes, a heater for heating air for drying the washed dishes, and hot air heated by the heater is blown to the washing tank. The fan and the outer surface of the dishwasher, the outer surface of the outer surface of the outer surface of the outer surface of the outer surface of the dishwasher, are used as cooling surfaces for cooling and dehumidifying the hot air moistened by drying the dishes, and the air dehumidified by the outer material of the outer frame. In the dishwasher provided with a circulation duct for returning to the fan again, between the circulation duct and the fan, an air switching valve for switching circulating air between circulation and exhaust, a switching valve body surrounding the air switching valve, and switching. A dishwasher comprising: a casing duct that connects the valve body and a fan casing of the fan; and a discharge duct that discharges exhaust gas from the switching valve body to the outside of the machine.