JPH02218327A - Method of operating dish washer - Google Patents

Abstract

PURPOSE:To prevent the humidity of the inside of a wash tank from rising so as to disable a sufficient drying function from being obtained, by making heat-exchange between air having a high temperature and a high humidity inside of the wash tank and air having a normal temperature outside of the wash tank, and by operating a water discharge pump in accordance with a detection signal from a washing water temperature detecting means. CONSTITUTION:At a drying step, air having a high temperature and a high humidity is taken out from a washing tank 13 through an air-intake port 24 under operation of a fan A28 of a blower 27, and is then blown into the wash tank 13 through an air blow-out port 25 so as to be circulated, and simultaneously, the outside air is taken through an air-intake port 30 under operation of a fan B29 and is discharged through an exhaust port 31. In this phase, the air having a high temperature and a high humidity is heat-exchanged with the air outside of the wash tank 13. After the initiation of the drying step, a supply of water having a temperature higher than a predetermined value T3 is detected by a washing water temperature detecting means 33 which delivers a detection signal. A water discharge pump 16 is operated in accordance with the detection signal so as to continue the drying step. With this arrangement, it is possible to prevent a sufficient drying function from disabling from being obtained since a large quantity of steam is generated so as to lower the dehumidifying function.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of operating a dishwasher that uses a jet of washing water to wash and dry dishes, cooking utensils, etc., and in particular a method for controlling moisture in a washing tank after washing. This drying method increases drying efficiency without discharging water to the outside.

2. Description of the Related Art A conventional method of operating a dishwasher of this type will be described with reference to FIG.

When dishes, cooking utensils, etc. are stored in the washing tank 1, detergent is added, and operation is started, there is a water supply process in which a predetermined amount of washing water is supplied to the washing tank 1 by the operation of the water supply valve 2, and then the washing process starts. A washing step is performed in which washing water pressurized by the pump 3 is sprayed together with detergent from the washing nozzle 4. 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. Subsequently, a water supply process in which new washing water is supplied, and washing water is sprayed from the washing nozzle 4 to clean dishes that are contaminated with detergent, leftover food (food that has adhered to the tableware as dirt is called leftover food), etc. The rinsing process for rinsing the dishes, etc. and the draining process for discharging the washing water outside the machine are repeated four times in succession to complete the washing, and the leftover food is captured in the filter 7 installed at the bottom of the washing tank. collected. In particular, the final rinsing step is called a heating rinsing step, in which the heater 5 is energized to heat the washing water and tableware to a predetermined temperature for the next drying step. continuation,
In the drying process, the air intake filter 9 is
Air is blown into the cleaning tank 1 from outside the machine through the air outlet 11 of the ventilation path 10, and the heater 5, which generates a large amount of heat because it is used to heat the cleaning water, is operated intermittently to control the amount of heat generated. The dishes in the washing tank 1 are kept at a high temperature and, at the same time, the moisture in the washing tank 1 is discharged to the outside of the machine through the exhaust port 12 to dry the dishes.

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 into the room, causing discomfort to the user.

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.

In view of the above problems, the first object of the present invention is to provide a dishwasher configured to use water in addition to the air outside the machine in order to efficiently dehumidify and dry without discharging hot and humid air outside the machine. ,
The aim is to ensure drying performance when high temperature water is supplied by improving the operating method.

The second objective is to improve the operating method of the drying process, and in particular to improve the heat exchange capacity and dehumidification performance by efficiently using water.

The third purpose is to detect changes in drying conditions such as the amount of tableware and cooking utensils, etc. and the installation conditions of the dishwasher, and to use water efficiently to ensure optimal operation during the drying process. It is to make it.

Means for Solving the Problems In order to achieve the above first object, the present invention provides a cleaning pump, a cleaning nozzle, a water supply valve, a heater for heating cleaning water,
a drainage pump, a cleaning water temperature detection means, an air circulation path communicating with an opening provided in the cleaning tank, a blower for circulating the air inside the cleaning tank and exchanging heat with the air outside the septic tank, and the cleaning tank. It has a control device that controls the operation of pumps, water supply valves, etc., and the operation of the control device operates the blower during the drying process, operates the water supply valve to supply a predetermined amount of water, and uses a water heater etc. to maintain the temperature above a predetermined temperature. The method of operating a dishwasher includes operating a drain pump in response to a detection signal from the washing water temperature detection means when water is supplied to continue the drying process.

Furthermore, in order to achieve the second object, the present invention includes a cleaning pump, a cleaning nozzle, a water supply valve, a heater that heats cleaning water,
a drainage pump, a cleaning water temperature detection means, an air circulation path communicating with an opening provided in the cleaning tank, a blower for circulating air inside the cleaning tank and exchanging heat with air outside the cleaning tank; It has a control device that controls the operation of the washing pump, water supply valve, etc. During the drying process, the operation of the control device operates the blower, operates the water supply valve to supply a predetermined amount of water, and lowers the water temperature to a predetermined temperature. In this method of operating a dishwasher, a drain pump is operated in response to a detection signal from the washing water temperature detection means in response to an increase in water temperature, and new water is supplied to continue the drying process.

Furthermore, in order to achieve the third object, the present invention provides a means for detecting the temperature inside the cleaning tank in addition to the above-mentioned means for achieving the second object. The detection level from the cleaning water temperature detection means is changed in response to the detection signal from the bath temperature detection means.

Function: With the above structure of the dishwasher of the present invention, in the drying process after the heating and rinsing process, the hot and humid air inside the washing tank is circulated by the blower in the air circulation path that communicates with the opening provided in the washing tank, and the washing process is performed while the hot and humid air is circulated inside the washing tank. By exchanging heat with room-temperature air outside the tank, water vapor in the air inside the cleaning tank can be condensed and collected from the air circulation path to the bottom of the cleaning tank.
Water droplets attached to the surface of tableware, cooking utensils, etc. can be evaporated and dried. In particular, by operating the drainage pump in response to a detection signal from the cleaning water temperature detection means in response to water supply having a predetermined temperature or higher after the start of the drying process by the control device, a large amount of steam is generated by the high temperature water and the cleaning tank 1 It is possible to prevent the internal humidity from rising and insufficient drying performance to be obtained.

In addition, by using a control device that operates the blower during the drying process and opens the water supply valve to supply a predetermined amount of water, when the hot and humid air inside the cleaning tank is circulated, it can be used as cleaning water in addition to the air outside the cleaning tank. It is possible to exchange heat, but
In particular, by operating the drainage pump in response to a detection signal from the cleaning water temperature detection means in response to the temperature rise of the cleaning water to the constant temperature at which the drying process is interrupted, and continuing the drying process by supplying new water, the water is removed. Since the temperature difference in the circulating air can be prevented from becoming small and the heat exchange ability can be maintained, dehumidification and drying can be carried out efficiently.

Furthermore, in addition to the above-mentioned actions by the control device, the cleaning water temperature sensing means, etc., the cleaning tank internal temperature sensing means generates a detection signal from the cleaning tank internal temperature sensing means in response to fluctuations in the cleaning tank internal temperature during the drying process. By changing the conditions for newly supplying water according to This allows for optimal operation in the drying process.

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

First, FIG. 1 shows the configuration of the first embodiment,
13 is a cleaning tank, 14 is a cleaning pump, 15 is a cleaning pump 1
a cleaning nozzle that sprays cleaning water pressurized by 4; 16;
17 is a drain pump that discharges washing water to the outside of the machine, and 17 is a filter 18 that collects leftover food, which is a drain hose. The filter 17 is mounted on the inner bottom of the cleaning tank 13, and the cleaning pump 14. There is a drain port 20 that communicates with the suction port 19 of the drain pump 16 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 this opening, and 27 is an air circulation path that takes in the air in the cleaning tank 13 from the air suction port 24 and connects it to the cleaning tank 13 from the air outlet 25.
It is a blower that blows air inward. Reference numerals 28 and 29 are a fan A for blowing air through the air circulation path 26 and a fan B for sucking in and exhausting air from outside the machine. 30・31
are the intake and exhaust ports for outside air, respectively. 32 is a control device that controls the operation of the cleaning pump 14, water supply valve 21, blower 27, etc. Reference numeral 33 denotes a cleaning water temperature detection means that detects the water temperature at the inner bottom of the cleaning tank 13 during the drying process as well as the cleaning process.

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 adhering to the dishes is washed off. It will be done. In this process, the cleaning water containing dirt is filtered through the filter 1.
While being filtered at step 7, the water is sent to the cleaning pump i4 from the suction port 19, and then sprayed again from the cleaning nozzle 15, which is repeated. Further, in this water washing step, the heater 23 provided in the washing tank 13 is energized to heat the washing water and tableware to a predetermined temperature T1 by the operation of the washing water temperature detection means 33. After the washing process for a predetermined time, a drainage process is performed to drain the dirty washing water, and the washing water in the washing tank 13 is filtered by the filter 17 and sent from the drain port 20 to the drain pump 16. It is 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 four times in a row, and then
The leftover food is collected in a filter 17 provided at the bottom of the cleaning tank 13. In particular, the final rinsing step is also called a heating rinsing step, and is a step of rinsing while heating the washing water and dishes to a predetermined temperature T2 by energizing the heater 23 for the next drying step. In this embodiment, the controller 32 operates the heating in the heated rinsing step under a temperature condition that is higher than that in the water washing step.

Subsequently, a drying process is performed using the operating method shown in FIG. In this drying process, the fan A2 of the blower 27
8, the hot and humid air inside the cleaning tank 13 is taken in from the air suction port 24 and blown into the cleaning tank 13 from the air outlet 25 of the air circulation path 26 to be circulated. Air is taken in from the intake port 30 and exhausted from the exhaust port 31. At this time, there is a temperature difference between the tableware temperature and the almost constant air temperature outside the washing tank 13, so the hot and humid air inside the washing tank 13 and the
3. Heat exchange with outside air is performed. Therefore, the water vapor in the air inside the cleaning tank 13 can condense at the blower 27 and be collected at the bottom of the cleaning 41513 through the air outlet 25 of the air circulation path 26, while also adhering to the surfaces of dishes, cooking utensils, etc. The high temperature water droplets can be evaporated and dried. After the drying process for a predetermined period of time, a process of draining the water at the bottom of the cleaning tank 13 is subsequently performed, and the entire process is completed.

In this embodiment, as shown in FIG.
When detecting the supply of three or more wash waters, the control device 32 operates the drain pump 16 in response to a detection signal from the wash water temperature detection means 33 to continue the drying process. This prevents the dehumidification performance from decreasing due to the generation of a large amount of steam due to high-temperature water above the predetermined temperature T3, which increases the humidity in the cleaning tank 13, and prevents sufficient drying performance from being obtained. It is something that can be done. At this time, the temperature of the tableware gradually decreases during the subsequent drying process, 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, cooking utensils, etc. can be evaporated. It can be left to dry.

Next, the operation of the control device in the drying process of the dishwasher according to the second embodiment of the present invention will be explained. In addition,
The structure of the mechanical parts is the same as in the first embodiment, so this will be shared, and the basic operation is the same as in the first embodiment, so this will be omitted. Figure 3 shows the operation in the drying process. Show how. In this embodiment, as shown in FIG.
2, the blower 27 is operated in the drying process, and the water supply valve is opened to supply a predetermined amount of water, so that when the hot and humid air inside the cleaning tank 13 is circulated, in addition to heat exchange with the air outside the cleaning tank 13, This allows heat exchange with low-temperature water. At this time, the water temperature gradually increases, the tableware temperature gradually decreases, and the heat exchange capacity and dehumidification performance also decrease.
At the start of the drying process, the temperature of the tableware, etc. is sufficiently raised to a predetermined temperature T2 (thereby, water droplets adhering to the surface of the tableware, cooking utensils, etc. can be evaporated and dried. In particular, the water temperature detection means 33 is used to detect the temperature of the tableware, cooking utensils, etc.). By detecting the rise in the water temperature to the predetermined temperature T4, the control device 32 operates the drain bong 116 in response to the detection signal from the cleaning water temperature detection means 34 to supply new water and start the drying process. By continuing this, the temperature difference between the water and the circulating air can be prevented from becoming small, and dehumidification and drying can be performed efficiently without reducing the heat exchange capacity.At the same time, the leftover food collected in the filter 17 can be Since the drying process can be performed while the food is submerged in water, the smell of leftover food is prevented from being exhausted indoors.

Furthermore, the operation of the control device in the drying process of the dishwasher in the third embodiment of the present invention will be explained. The structure of the mechanical parts is the same as that of the first embodiment, so this is shared, and the basic operation is the same as that of the first embodiment, so this is omitted and Fig. 4 shows the drying process. Shows how to drive. In this embodiment, as shown in FIG. 4, as the drying process progresses, the water temperature gradually increases and the tableware temperature gradually decreases. The control device 32 controls the cleaning water temperature detection means 3 in response to the detection signal from the cleaning tank internal temperature detection means 34.
3', i.e., by changing the detection level of drain pump 1.
6 and changing the temperature conditions for supplying new water, T5 of the temperature inside the cleaning tank during the drying process.
In response to the decrease from T6 to T6, the predetermined water temperature is set to T7.
It has been lowered from T8 to T8. That is, the cleaning water temperature detection means 3 responds to the detection signal from the cleaning tank internal temperature detection means 34.
3 is changed, and under these conditions, the drain pump 16 is operated to supply new water and continue the drying process. Therefore, even if the temperature inside the washing tank or water temperature fluctuates due to changes in drying conditions such as the amount of tableware, cooking utensils, etc. or the installation conditions of the dishwasher, it is ensured that the temperature difference between water and circulating air remains below a certain value. Optimal operation is carried out to ensure efficient (and reliable) dehumidification and drying.

In addition, in each of the above embodiments, it is possible to perform dehumidification and drying, prevent the smell of leftover food from being exhausted into the room, and reduce the leakage of cleaning noise.

Effects of the Invention As described above, the present invention has a configuration in which a control device operates a blower during the drying process and at the same time opens a water supply valve to supply a predetermined amount of water. It exchanges heat with low-temperature water in addition to outside air, and can efficiently dehumidify and dry the inside of the washing tank and the surface of dishes, ensuring drying performance even when high-temperature water is supplied. It is something that can be done.

In addition, the present invention improves the operating method by detecting the rise in water temperature during the drying process, which makes it possible to use water more efficiently ( It is possible to provide a dishwasher of high practical value that can efficiently dehumidify and dry without reducing the heat exchange capacity during the drying process.

Furthermore, the present invention detects changes in drying conditions such as the amount of tableware and cooking utensils, etc. and the installation conditions of the dishwasher, and uses water more efficiently to ensure optimal operation that ensures dehumidification and drying in the drying process. Therefore, it is possible to provide a dishwasher that has high performance, a high sense of cleanliness, and is extremely useful.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of main parts of a dishwasher in a drying process according to a first embodiment of the present invention, and FIG. 2 is a diagram showing an operating method of a dishwasher in a drying process in the first embodiment. FIG. 3 is a diagram showing a method of operating a dishwasher in a drying process in a second embodiment of the present invention, and FIG. 4 is a diagram showing a method of operating a dishwasher in a drying process in a third embodiment of the present invention. FIG. 5 is a cross-sectional view of main parts of a conventional dishwasher during a cleaning process. 13...Cleaning tank, 14...Cleaning pump, 16...
Drain pump, 17... Filter 21... Water supply valve, 23... Heater, 26... Air circulation path, 27...
...Blower, 32...Control device, 33...Cleaning water temperature detection means, 34...Cleaning tank internal temperature detection means. Agent's name Patent attorney Shigetaka Awano Idiot 1 name figure 3 --1 drainage pump 絽J (valve heater blower tsuba meter 3-・- n-・ 一hai) 7 Routing Dan Arashi Rohan Go Omoteki i Jyōsui 1 Hakama Handyaku + 6 - Kakemizu Popp z I - 2 ni Ben 6 - Death - Yuwani Yami 1 6 - 27 - Rinhyo 7 $ Nbu 7 ni # C - Yu 5th figure of the wind deafness! ...-Situation Purifier 8-Water supply valve 3-Washing pop 4-Washing nostle 8--1 Mold 2--1 Hydraulic air O

Claims (3)

[Claims] (1) 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 a machine that supplies the cleaning water. a drainage pump for discharging the water to the outside; a cleaning water temperature detection means; an air circulation path communicating with an opening provided in the cleaning tank; It has an air blower for exchanging heat with external air, and a control device that controls the operation of the washing pump, water supply valve, air blower, etc., and the control device operates the air blower and controls the water supply valve during the drying process. A method for operating a dishwasher, in which a predetermined amount of water is supplied by operating the washing water temperature detecting means, and a drain pump is operated in response to a detection signal from the washing water temperature detecting means to continue the drying process. (2) A cleaning pump, a cleaning nozzle that sprays pressurized cleaning water from the cleaning pump, a water supply valve that supplies cleaning water to the cleaning tank, a heater that heats the cleaning water, and a machine that supplies the cleaning water. a drainage pump for discharging the water to the outside; a cleaning water temperature detection means; an air circulation path communicating with an opening provided in the cleaning tank; It has an air blower for exchanging heat with external air, and a control device that controls the operation of the washing pump, water supply valve, air blower, etc., and the control device operates the air blower and controls the water supply valve during the drying process. is operated to supply a predetermined amount of water, and in response to a detection signal from the washing water temperature detection means in response to a rise in water temperature, the drain pump is operated and new washing water is supplied to continue the drying process. How to operate the machine. (3) A cleaning tank internal temperature detecting means is provided, and the detection level of the cleaning water temperature detecting means is changed in response to a detection signal from the cleaning tank internal temperature detecting means, which detects fluctuations in the cleaning tank internal temperature by a control device. 3. The method of operating a dishwasher according to claim 2.