JPH02218328A - Dishwasher - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a dishwasher that washes dishes, cooking utensils, etc. by jetting washing water, and particularly to a dishwasher that removes moisture in the washing tank outside the machine after washing. It is dried without being discharged.

Conventional technology When the appliances, cooking utensils, etc. are stored, detergent is added, and operation is started, there is a water supply process in which a predetermined amount of cleaning water is supplied to the cleaning tank 1 by the operation of the water supply valve 2, and then the cleaning pump is activated. 3, a water washing process is performed in which pressurized washing water is injected from the washing nozzle 4 together with detergent. In this washing process, electricity is supplied to the heater 5 provided in the washing tank 1 to heat the washing water and the tableware to a predetermined temperature. After the washing process for a predetermined period of time, a drainage process is started in which the washing water containing the dirt washed off from the tableware etc. is drained by the drainage pump 6. Continuing with the water supply process, which supplies new cleaning water, the cleaning water is transferred to the cleaning nozzle 4.
A rinsing process is used to rinse dirty dishes, etc. with detergent and leftover food (food that has adhered to the tableware as dirt is called leftover food) by spraying water from the machine, and drainage is used to discharge washing water outside the machine. The process is repeated four times in succession to complete the cleaning, and the leftover food is collected in a filter 7 provided at the bottom of the cleaning tank. In particular, the final rinsing process is called a heated rinsing process.
For the next drying process, electricity was supplied to the heater 5 to heat the washing water and tableware to a predetermined temperature. Subsequently, in the drying process, air is taken in from outside the machine through the intake filter 9 by the operation of the blower 8, and air is blown into the cleaning tank 1 from the air outlet 11 of the ventilation path 10, and is also used to heat the cleaning water. The heater 5, which generates a large amount of heat, is operated intermittently to control the amount of heat generated while keeping the dishes in the washing tank 1 at a high temperature. At the same time, the moisture in the washing tank 1 is exhausted from the exhaust port 12 to dry the dishes. things were being done.

Problems to be Solved by the Invention However, because conventional dishwashers discharge hot and humid air outside the machine during the drying process, the humidity inside the room where the dishwasher is installed may rise excessively, and the exhaust outlet may There was a problem with dew condensation around No. 12. Another problem was that a large amount of cleaning noise leaked from the exhaust port. Furthermore, there is another problem in that the odor of leftover food collected by the filter 7 is exhausted together with the hot and humid air, giving the user an unpleasant feeling. In addition, as a technical means to solve these problems, there is a dishwasher configured to circulate the air in the washing tank for drying as shown in Utility Model Publication No. 59-4606, but in addition to the heat exchanger, the drying It had a somewhat complicated configuration that required a dedicated heater.

The present invention improves the drying method in view of the above problems, and has a simple structure that does not require a dedicated drying heater and can be manufactured at low cost, thereby dehumidifying and drying without discharging hot and humid air outside the machine. The primary purpose is to prevent the smell of leftover food from being exhausted into the room and to reduce the leakage of cleaning noise.

The second objective is to use water efficiently to efficiently dehumidify and dry food with an extremely simple configuration that does not require air circulation paths for heat exchange, and to eliminate the smell of leftover food by exhausting it into the room. The leakage of cleaning noise is also small.

Means for Solving the Problems In order to achieve the above-mentioned first object, the present invention provides an air circulation path that communicates with an opening provided in a cleaning tank, and an air circulation path that is provided within the air circulation path to communicate with an opening provided in the cleaning tank. and a control device for controlling the operation of a cleaning pump, a water supply valve, a blower, etc., and at least one of the openings is provided at a position substantially facing the water surface. This is a dishwasher configured to operate a blower during the drying process and at the same time open a water supply valve to supply a predetermined amount of water.

In addition, in order to achieve the second object, the present invention provides a blower provided at the bottom of the cleaning tank and equipped with blades for stirring and circulating the air in the cleaning tank and stirring the water at the bottom of the cleaning tank; The dishwasher is equipped with a control device that controls the operation of a washing pump, a water supply valve, an air blower, etc., and the control device operates the blower during the drying process and opens the water supply valve to supply a predetermined amount of water. It is something.

Effect: With the configuration of the above-mentioned first means, in the drying process after the heating rinsing process, the hot and humid air inside the cleaning tank is circulated by the operation of the blower in the air circulation path communicating with the opening provided in the cleaning tank. By blowing air into the water surface or water at the bottom of the cleaning tank and exchanging heat with the water at the bottom of the cleaning tank, water vapor in the air inside the cleaning tank can be condensed and recovered. In addition, water droplets adhering to the surfaces of tableware, cooking utensils, etc. are evaporated to dehumidify and dry them, and the smell of leftover food is not exhausted into the room, and leakage of cleaning noise can be reduced.

In addition, the second means operates a blower equipped with blades to agitate and circulate the air in the cleaning tank during the drying process and at the same time stir the water at the bottom of the cleaning tank, and at the same time opens the water supply valve to supply a predetermined amount of water. By adopting a water supply configuration, there is no air circulation path outside the cleaning tank, and when the blower stirs and circulates the hot and humid air inside the cleaning tank, it exchanges heat with the low-temperature water at the bottom of the cleaning tank. As a result, dehumidification and drying can be performed efficiently, and the smell of leftover food can be prevented from being exhausted into the room, and leakage of cleaning noise can also be reduced.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

FIG. 1 is a cross-sectional view of main parts showing the configuration of a dishwasher in the first embodiment, in which 13 is a washing tank, 14 is a washing pump,
15 is a cleaning nozzle that sprays pressurized cleaning water by the cleaning pump 14; 16 is a drain pump that discharges the cleaning water to the outside of the machine; 17 is a filter that collects leftover food; and 18 is a drainage hose.

The filter 17 is mounted on the inner bottom of the cleaning tank 13, and at the bottom there is a drain port 20 that communicates with the suction port 19 of the cleaning pump 14 and the suction port of the drain pump 16. 21 is a water supply valve for supplying washing water to the washing tank 13, 22 is a tableware basket for storing dishes etc. in the washing tank 13, 23 is a heater for heating the washing water, and 24 and 25 are openings provided in the washing tank. 26 is an air circulation path that communicates with these openings, and 27 is an air circulation path that takes in the air in the cleaning tank 13 from the air suction port 24 and passes it into the cleaning tank 13 from the air outlet 25. It is a blower that blows air. 28 is a control device that controls the operation of the cleaning pump 14, water supply valve 21, and blower 27.

The operation of the above configuration will be explained below. Add a predetermined amount of detergent and place the dishes, etc. in the dish basket 2 in the washing tank 13.
2 and start driving. First, when washing water is supplied by energizing the water supply valve 21, a washing process is performed in which washing water containing detergent is pressurized by the washing pump 14 and sprayed from the washing nozzle 15, and dirt attached to dishes etc. is washed away. be dropped. In this process, the cleaning water containing dirt is repeatedly filtered by the filter 17, sent to the cleaning pump 14 from the suction port 19, and sprayed again from the cleaning nozzle 15. In addition, in this water washing process, electricity is supplied to the heater 23 provided in the washing tank 13 to maintain the washing water and dishes at a predetermined temperature T1.
heated up to. After the washing process for a predetermined period of time, a drainage process is performed to drain the dirty washing water, and the washing tank 13 is drained.
The cleaning water inside is filtered through the filter 17 and drained into the drain port 2.
0 to the drain pump 16 and discharged from the drain hose 18 to the outside of the machine. Subsequently, there is a water supply process in which new washing water is supplied, a rinsing process in which washing water is sprayed from the washing nozzle 15 to rinse dishes, etc. soiled with detergent or leftover food, and the washing water is discharged outside the machine. The drainage process is repeated 4 times in a row.
The process is repeated several times and the leftover food is collected in the filter 17 provided at the bottom of the cleaning tank 13. In particular, the final rinsing step is also called a heating rinsing step, in which the heater 23 is energized to maintain the washing water and tableware at a predetermined temperature T2 for the next drying step.
This is a rinsing process while heating to a maximum temperature.

In this embodiment, the control device 28 sets the heating in the heated rinsing process to be one temperature higher than that in the water washing process. Subsequently, a drying process is performed using the operating method shown in FIG. In this drying step, the blower 27 takes in hot and humid air inside the cleaning tank 13 from the air suction port 24, and blows it into the cleaning tank 13 from the air suction port 25 to circulate it. The air outlet 25 is located at a position substantially facing the water surface, and by exchanging heat between the hot and humid air and the water at the bottom of the cleaning tank 13, water vapor in the air in the cleaning tank 13 is condensed and recovered. be able to. At this time, the water temperature gradually increases and the tableware temperature gradually decreases, but by raising the temperature of the tableware, etc. sufficiently to the predetermined temperature T2 at the beginning of the drying process, water droplets attached to the surface of the tableware and cooking utensils can be evaporated. Can be dried. After the drying process for a predetermined time, the water at the bottom of the cleaning tank 13 is drained, and the entire cleaning and drying process is completed.

In addition, in this embodiment, if the water level of the water 29 is set lower than that of the heater 23, the heater 23 can be operated intermittently in parallel with the blower 27 as shown by broken lines in FIG. 2 during the drying process. It becomes possible to maintain the tableware temperature at a high temperature to maintain a state in which water droplets easily evaporate, thereby improving drying performance.

Next, a second embodiment of the present invention will be described.

FIG. 3 is a cross-sectional view of the main parts showing the structure of a dishwasher according to the second embodiment of the present invention, and the structure of many mechanical parts is the same as that of the first embodiment (this is also common). Therefore, a part of the explanation will be omitted. In FIG.
It is equipped with blades for stirring the water at the inner bottom, which will be referred to here as a fan 31 and an impeller 32, respectively. 33 is a control device that controls the operation of the cleaning pump 14, water supply valve 21, blower 30, and the like. Note that the basic operation of the cleaning process is the same as that of the first embodiment, so a description thereof will be omitted. Further, the drying step is carried out in the same manner as in the first embodiment shown in FIG. In this embodiment, in the drying process, the controller 26 operates the blower 30 and opens the water supply valve to supply a predetermined amount of water. In addition, when the fan 31 stirs and circulates the hot and humid air inside the cleaning tank 13, the cleaning tank 13
Since heat can be exchanged with the low-temperature water at the bottom, water vapor in the air within the cleaning tank 13 can be condensed and recovered. At the same time, by stirring the water by the action of the impeller 32, the water temperature can be made uniform and the temperature of the water surface can be prevented from increasing, so that heat exchange can be continued during the drying process. At this time, the water temperature gradually increases and the tableware temperature gradually decreases, so the heat exchange ability decreases. Also, water droplets adhering to the surface of tableware etc. can be evaporated and dried.

In this example, the impeller 32 is located below the water surface and directly stirs the water, but it may be located above the water surface and indirectly stirs the water by blowing air. Needless to say. Furthermore, the fan 31 and the impeller 32 may be separate bodies and each may have a separate drive source. Furthermore, in this embodiment, if the water level is set lower than that of the heater 23, as explained in the first embodiment, the tableware temperature can be maintained at a high temperature by also using intermittent operation of the heater 23 during the drying process. can improve drying performance. Furthermore, in this case, the temperature of the tableware can be increased by changing the ratio between the 08 hours and the OFF time regarding the intermittent operation of the heater 23, so it is possible to perform only drying without washing, which increases the utility value. It will be expensive.

Effects of the Invention As described above, the present invention has a configuration in which a blower is operated during the drying process and a water supply valve is opened to supply a predetermined amount of water, thereby circulating hot and humid air inside the cleaning tank. It can exchange heat with the water at the bottom, has a simple configuration that does not require a dedicated heater for drying, and can be manufactured at low cost, and can dehumidify and dry the inside of the washing tank and the surface of dishes, etc. , the humidity in the room where the dishwasher is installed will not rise excessively, and dew will not form around the outlet. At the same time, it is possible to provide a dishwasher that does not exhaust the smell of leftover food into the room and that leaks only a small amount of cleaning noise.

In addition, the present invention utilizes water efficiently by providing a blower equipped with an impeller for stirring the water at the bottom of the cleaning tank in addition to a fan for stirring and circulating the air in the cleaning tank. Although it has an extremely simple configuration with no air circulation path for heat exchange, it can perform dehumidification and drying, and does not exhaust the smell of leftover food into the room and reduces the leakage of cleaning noise. This makes it possible to provide a dishwasher with high practical value.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main parts of a dishwasher according to the first embodiment of the present invention, Fig. 2 is a diagram showing the operating method in the drying process of the dishwasher according to the first embodiment, and Fig. 3 is a FIG. 4 is a cross-sectional view of a main part of a dishwasher according to the second embodiment, and FIG. 4 is a cross-sectional view of a main part of a conventional dishwasher. 13...Cleaning tank, 14...Cleaning pump, 16...
Drain pump, 17... Filter, 21... Water supply valve, 23... Heater, 24... Air suction port, 25...
- Air outlet, 26... Air circulation path, 27... Blower, 28... Control device, 29... Water, 31...
Fan, 32... Name of Impeller agent: Patent attorney Shigetaka Awano and 1 other person/4 ゛-
IF water bonf. ? f-Water tank 23-Heater time 3.3 /3-Fi purification tank 14-Cleaning bottle 7' l5--Shi η Shishi no Suru 16-#? −
Hoponfu 2 2f-Reisuisho 27・-Sako

Claims (2)

[Claims] (1) A cleaning pump, a cleaning nozzle that sprays cleaning water pressurized by the cleaning pump, a water supply valve for supplying cleaning water to the cleaning tank, a heater that heats the cleaning water, and a cleaning tank provided with the following: an air circulation path communicating with a large number of openings;
The air blower is provided in the air circulation path and circulates the air inside the cleaning tank, and the control device controls the operation of the cleaning pump, water supply valve, and air blower, and at least one of the openings is located at approximately the cleaning water level. The control device opens a water supply valve to supply a predetermined amount of water during a drying process, and operates the blower. (2) A cleaning pump, a cleaning nozzle that sprays cleaning water pressurized by the cleaning pump, a water supply valve that supplies cleaning water to the cleaning tank, a heater that heats the cleaning water, and an inner bottom of the cleaning tank. a blower provided with blades for agitating and circulating the air in the cleaning tank and stirring the cleaning water at the bottom of the cleaning tank; and a control device for controlling the operation of the cleaning pump, water supply valve, and blower. A dishwasher, wherein the control device opens a water supply valve to supply a predetermined amount of water during a drying process and operates the blower.