JP2008161364A - Dishwasher/dryer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher/dryer in which the temperature of steam discharged from a discharge port is lowered by lowering the temperature of cleaning water in a final heating/rinsing process immediately before the drying process without prolonging the time of the heating/rinsing process. <P>SOLUTION: The dishwasher/dryer is equipped with a tableware basket 4 for storing a tableware 3, a nozzle 9 provided with a jet hole 8 for jetting the cleaning water toward the tableware, a cleaning pump 10 for pressurizing and supplying the cleaning water in a cleaning tank to the nozzle, a heater 11 for heating the cleaning water, a temperature detection means 18 for detecting the temperature of the cleaning water, a drain pump 15 for draining the cleaning water, a blowing means 12 for blowing air into the cleaning tank, and a control means 16 carrying an operation program for executing a cleaning process, rinsing process and drying process. The control means executes plural times of heating/rinsing process for rinsing the tableware while heating the cleaning water to high temperature, and controls the temperature of the cleaning water to lower than the temperature which is at least the minimum temperature and lower than the maximum temperature in the plural times of heating/rinsing process in the heating/rinsing process immediately before the drying process. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dishwasher that controls to lower the temperature of steam discharged from an exhaust port.

  The dishwasher has the advantage that dishes can be washed at a high temperature compared to hand-washing. However, if the temperature is high before the drying process, the high temperature and high humidity of, for example, 70 to 80 ° C. from the exhaust port at the beginning of the drying process. Therefore, a control technique for reducing the steam temperature at the initial stage of the drying process is required.

For example, Patent Literature 1 discloses a dishwasher that performs operation control as shown in FIGS. 3 and 4.
In the operation control method shown in FIG. 3, in the heating and rinsing process in which the washing water and tableware are heated to a high temperature of 70 ° C. or higher, the heating water that is heated to a predetermined temperature is deenergized. For this reason, when the heating and rinsing process is completed, the washing water is discharged to a predetermined temperature or lower, and at the start of the drying process, the temperature in the cleaning tank is set to a predetermined exhaust temperature or less at the start of the drying process.
In the operation control method shown in FIG. 4, when the temperature switch is pressed before the operation is started or during the operation, the washing water, the tableware, etc. are heated in the heating rinsing process in which the washing water, the tableware, etc. are heated to a high temperature of 70 ° C. or higher. Rinsing the heating element heated to a predetermined temperature is de-energized, and the water supply valve is energized to supply new cleaning water. Therefore, when the heating rinsing process is completed, the cleaning water is more reliably and for a short time. The drainage will be below the predetermined temperature.

JP 2000-189377 (page 6-7, FIG. 4, FIG. 6)

However, in the operation control method for lowering the washing water temperature in the final heating rinsing process as described above, since the time of the final heating rinsing process becomes long, the operation time of the washing pump becomes long, or new washing water is supplied. However, there is a problem that it is not suitable for energy saving in terms of power saving and water saving.
Moreover, since the temperature of tableware will also fall if the final rinse temperature just before a drying process is reduced too much, there also exists a subject that the drying process time of the next process becomes long or drying performance falls remarkably.

  In view of the above problems, the present invention reduces the temperature of the steam discharged from the discharge port by lowering the washing water temperature in the final heating rinsing process immediately before the drying process without increasing the time of the heating rinsing process. An object of the present invention is to provide a dishwasher designed to be used.

  In order to solve the above-mentioned problems, a dishwasher according to the present invention includes a washing tub, a tableware for storing tableware, a nozzle provided with an injection hole for injecting cleaning water toward the tableware, and a washing tub in the nozzle. A cleaning pump that supplies the cleaning water under pressure, a heating body that heats the cleaning water, a temperature detection means that detects the temperature of the cleaning water, a drainage pump that discharges the cleaning water, and air is blown into the cleaning tank And a control means equipped with an operation program for executing a cleaning process, a rinsing process and a drying process, the control means rinsing the tableware while heating the cleaning water to a high temperature a plurality of heating and rinsing processes In the heating rinsing process immediately before the drying process, the washing water temperature is controlled to be not less than the lowest temperature and lower than the highest temperature in the plurality of heating rinsing processes.

  By configuring in this way, the temperature of the steam discharged from the exhaust port can be set to a temperature at which no burns occur without increasing the time of the heating rinsing process, and energy saving and energy saving can be achieved. Become.

Embodiment 1 FIG.
FIG. 1 is a schematic cross-sectional view of a dishwasher in Embodiment 1 of the present invention.
In this dishwasher / dryer, a washing tank 2 is installed in a main body 1, and a dish basket 4 for storing tableware 3 is provided in the washing tank 2. The cleaning water 5 is supplied to the cleaning tank 2 through a water supply valve 7 from a water supply pipe 6 connected to the upper part on the back side of the main body 1. In order to inject the cleaning water 5 toward the tableware 3 stored in the tableware basket 4, a nozzle 9 having a plurality of injection holes 8 is arranged at the lower part of the cleaning tank 2, and the cleaning tank 10 is operated by the cleaning pump 10. The cleaning water 5 inside is pressurized and supplied to the nozzle 9. A heating element 11 for heating the cleaning water 5 to a predetermined temperature is installed in the cleaning tank 2. Further, as a means for drying the tableware 3, an air blowing means 12 including a fan for blowing air into the cleaning tank 2 is provided. The steam is discharged from the exhaust port 13 to the outside of the machine. The washed wastewater is collected by the filter 14 after collecting leftovers (the food that has adhered to the tableware or the like as the leftovers), etc., and then discharged to the outside by the drainage pump 15.

  Control means 16 is provided to control the operation of the dishwasher, and the control means 16 has an operation program (not shown) for executing a washing process, a rinsing process, and a drying process in a storage unit (not shown). ) Is installed. The control means 16 includes a water level detection signal from a water level detection means 15 for detecting the water level of the cleaning water 5 in the cleaning tank 2 and a temperature detection means 16 for detecting the temperature of the cleaning water 5 in the cleaning tank 2. The temperature detection signal is input, and the control means 16 controls the operation of the dishwasher according to the above operation program based on the detection signal of the water level and temperature.

  FIG. 2 shows the operation control of the dishwasher, the temperature of the washing water, and the steam temperature during drying. With reference to FIG.1 and FIG.2, an effect | action and operation control of this dishwasher are demonstrated.

After storing the tableware 3 in the tableware basket 4 and setting the tableware basket 4 in the washing tub 2, when the detergent is introduced and the operation button (none of which is shown) of the operation panel is pressed, By opening, the cleaning water 5 is supplied to the cleaning tank 2 through the water supply pipe 6. When the water level detecting means 17 detects that the predetermined water level has been reached, the signal is input to the control means 16, and when the set water level is reached, the feed valve 7 is closed by the output signal from the control means 16. Stop water supply.
Thereafter, as shown in FIG. 2, the control means 16 executes a cleaning process of the operation program.

  In the cleaning process, the heating body 11 is energized to heat the cleaning water 5 in the cleaning tank 2 to a predetermined temperature, while the cleaning pump 10 pressurizes the cleaning water 5 and supplies it to the nozzle 9 to supply a plurality of injection holes 8. It sprays toward tableware 3 more. The heating temperature of the washing water is heated to about 60 ° C. in consideration of the activation temperature of the detergent and the dissolution temperature of the oil adhering to the dishes. By the jetting of the heated washing water 5, the stains on the tableware 3 are washed away. The temperature of the cleaning water 5 is detected by the temperature detection means 18, and the control means 16 controls the energization of the heating element 11 until the signal is input to the control means 16 and reaches a predetermined set temperature.

  When the washing process for a predetermined time is completed, the washing water 5 containing the dirt washed off from the tableware 3 is discharged to the outside by the drain pump 14. Subsequently, the cleaning water 5 is newly supplied and sprayed again from the spray hole 8 provided in the nozzle 9 to perform the rinsing process of the dishes 3 soiled with detergent, leftovers or the like. When this rinsing process is completed, the washing water 5 is again discharged out of the machine. This rinsing process is repeated a plurality of times in succession. Note that leftovers and the like in the wastewater are collected by the filter 13.

  The present invention is characterized in that this rinsing process is improved. That is, as shown in FIG. 2, first, in the rinsing process 1 and the rinsing process 2, the tableware 3 is rinsed without energizing the heating element 11 and heating the washing water 5. Next, the process proceeds to the heating and rinsing step 1, and this time, the heating element 11 is energized to rinse the tableware 3 while heating the cleaning water 5. The washing water temperature in the heating rinse step 1 may be any temperature (about 70 to 80 ° C.) that can sterilize the bacteria adhering to the dishes 3 as shown by point C in FIG. Continue heating rinse step 1 while heating to point temperature. Next, the heating rinsing process 2 is a final heating rinsing process immediately before the drying process. In the heating rinsing process 2, the washing water 5 is heated to the set temperature while energizing the heating element 11, and the dishes 3 Rinse. That is, the temperature of the washing water is not less than the lowest temperature (temperature at point A in FIG. 2) in several heating rinse steps and lower than the maximum temperature at point C (temperature at point B in FIG. 2). Set and control the wash water temperature so that the temperature is lower than the possible temperature). The set temperature here is a temperature necessary for drying the tableware 3.

  When the predetermined number of heat rinsing steps are completed, the drying step is started. In this drying process, the air blowing means 12 operates to send air outside the apparatus into the cleaning tank 2. The air sent in dries the dishes 3 and is discharged out of the machine through the exhaust port 13.

According to the first embodiment, the washing water temperature in the heating rinsing process 2 immediately before the drying process is equal to or higher than the lowest washing water temperature (the temperature at the point A in FIG. 2) in the plurality of heating rinsing processes. By controlling the temperature so that it is lower than the maximum temperature (the temperature at point B in FIG. 2), it is not heated to a wash water temperature of about 70 to 80 ° C. that can be sterilized. The temperature of the steam discharged from 13 can be lowered to a temperature at which no burn occurs.
In addition, since the temperature of the washing water in the heating rinse step 2 is lowered to the temperature necessary for drying the tableware 3 to heat the tableware 3, the drying performance is not deteriorated and the final heating rinse step is performed. It does not take a long time. Therefore, it is possible to save water and save electricity and save energy.

Embodiment 2. FIG.
The second embodiment will be described with reference to FIG. In the second embodiment, the washing water temperature in the heating rinsing process 2 immediately before the drying process is defined. That is, this washing water temperature is controlled within a range of about 40 to 65 ° C. or less. Since the temperature at which burns occur is generally 60 ° C. or higher, the temperature of the steam discharged from the exhaust port 13 at the start of the drying stroke is controlled by controlling the washing water temperature in the heating rinse step 2 to 65 ° C. or lower. It can be made below ℃. Moreover, if the temperature of the tableware 3 required for drying shall be 40 degreeC or more, there will be no fall of drying performance.

It is a schematic cross section of the dishwasher in Embodiment 1 of this invention. It is a figure showing the operation control of the dishwasher of this invention, the temperature of washing water, and the steam temperature at the time of drying. It is a figure showing the operation control of the conventional dishwasher, and the temperature of wash water. It is a figure showing the operation control of the conventional dishwasher, and the temperature of wash water.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body, 2 Washing tank, 3 Tableware, 4 Tableware basket, 5 Washing water, 6 Water supply pipe, 7 Water supply valve, 8 Injection hole, 9 Nozzle, 10 Washing pump, 11 Heating body, 12 Blower means, 13 Exhaust port, 14 Filter, 15 Drain pump, 16 Control means, 17 Water level detection means, 18 Temperature detection means.

Claims (2)

  A washing tank, a tableware container for storing dishes, a nozzle having an injection hole for injecting washing water toward the dishes, a washing pump for supplying the washing water in the washing tank under pressure to the nozzle, and washing water A heating body for heating, a temperature detecting means for detecting the temperature of the washing water, a drain pump for discharging the washing water, a blowing means for blowing air into the washing tank, and a washing process, a rinsing process and a drying process are executed. Control means equipped with an operation program, wherein the control means performs a plurality of heating and rinsing steps of rinsing dishes while heating the washing water to a high temperature, and in the heating and rinsing step immediately before the drying step, A dishwasher characterized in that the temperature is controlled to be lower than the lowest temperature and lower than the highest temperature in a plurality of heating and rinsing steps.   The dishwasher according to claim 1, wherein the control means controls the washing water temperature in the heating rinsing process immediately before the drying process to about 40 to 65 ° C.

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