JPH06154148A - Dishwasher dryer - Google Patents

Abstract

PURPOSE:To prevent deformation of tableware and burn, and facilitate the cleaning work in a tub. CONSTITUTION:A dishwasher dryer is provided with a washing nozzle 7 for injecting the washing water sent from a water storing part 11 by a pump 13 into a tub 3; a circulating passage 9 for guiding the air in the tub 3 to the outside of the tub by a circulating fan 27, and then feeding the air again into the tub 3: and a moisture removing heat exchanging part 29 provided in the circulating passage 9 to remove the moisture in the air passed in the circulating passage 9. A drying heater 25 is provided in the circulating passage 9, and a heating heater 17 for heating the washing water in the water storing part 11 is independently provided on the outside of the tub.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher / dryer.

[0002]

2. Description of the Related Art Generally, in a dish washer / dryer, washing water is sprayed on the dishes stored in a tank to wash them.
Next, after rinsing water is applied to wash off the cleaning water, dry air is applied to finish and dry the structure.

[0003]

The washing water and the drying air are heated by a heater in order to improve the washing efficiency and the drying efficiency.

The heater is designed to efficiently perform heating.
The installation location is fixed. That is, when washing or rinsing, it is underwater (or the position where water always passes over the heater).
In addition, at the time of drying, it is installed so as to be located in the air and exposed to the bottom of the tank. Therefore, the following problems arise.

(1) When the tableware is taken out immediately after the completion of drying, there is a risk that the heater having a relatively high surface may be touched by the hand and burned.

(2) When the tableware is set in an unstable state, the tableware may drop from the tableware basket due to the water pressure during the washing and rinsing steps, and in some cases, the heater may directly come into contact with the heater. At that time, if the tableware is made of synthetic resin, it may be deformed.

(3) The heater is an obstacle when taking out the residual food filter or cleaning the inside of the tank, which is not desirable in terms of work.

Therefore, an object of the present invention is to provide a dishwasher / dryer which solves the above problems.

[0009]

In order to achieve the above object, the present invention provides a cleaning nozzle for injecting cleaning water sent from a water reservoir by a pump into the tank, and an air in the tank by a circulation fan. After being guided to the outside of the tank, it is provided with a circulation passage for circulation to be sent again into the tank, and a dehumidifying heat exchange section provided in the circulation passage for removing moisture in the air passing through the circulation passage. While a drying heater is provided in the passage, heating heaters for heating the wash water in the water storage section are independently provided outside the tank.

In a preferred embodiment, the drying heater is preheated before the drying step in which the air in the tank is circulated through the circulation passage by the circulation fan.

Further, a temperature detecting means is provided in the circulation passage, and the drying heater and the circulation fan are operated and controlled based on a detection signal from the temperature detecting means.

[0012]

According to such a dishwasher / dryer, since the washing water and the rinsing water are heated by the heater for heating in the washing step and the rinsing step, the washing and rinsing can be efficiently performed.

Further, in the drying step, the drying air is heated by the drying heater and moisture is removed by the dehumidifying heat exchange section, so that the drying can be efficiently performed.

On the other hand, when the dishes are put in and taken out of the tank, the hands do not come into direct contact with the heater, and the inside of the tank and the residual food filter can be easily cleaned and managed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings of FIGS.

In the figure, reference numeral 1 denotes a dryer main body, 3 denotes a tank provided in the dryer main body 1, and an opening / closing door 5 which can be opened and closed is provided in front of the tank 3.

A washing nozzle 7 is provided inside the tank 3, and a circulation passage 9 is provided outside the tank 3.

The washing nozzle 7 has a plurality of jetting ports for jetting upward and a pair of jetting ports for jetting substantially horizontally with different 180 ° orientations. From the water storage section 11 provided at the bottom of the dryer main body 1. By feeding the washing water through the washing pump 13, the water is vigorously jetted from the jet port of the washing nozzle 7. At this time, the cleaning nozzle 7 is given a swirling motion by the spraying pressure sprayed in the horizontal direction.

The water storage section 11 is arranged at the bottom of the bottom of the tank 3 and is capable of supplying washing water and rinsing water from outside the drawing. It flows through the vegetable filter 15.

The water in the water storage section 11 is heated by a heater 17 for temperature control which is controlled by a control section (not shown), and the cleaning nozzle 13 is operated by the operation of the cleaning pump 13.
The circulation to return to the water storage section 11 again via is repeated. In addition, the water in the water reservoir 11 is the drainage pump 1
By operating 9 it is possible to drain water to the outside.

The circulation passage 9 is independently formed by a duct 9a, and one suction port 21 and the other blowing port 23 open in the tank 3 and communicate with each other.

In the circulation passage 9, a drying heater 25,
It has a circulation fan 27 and a dehumidifying heat exchange section 29, and by the operation of the circulation fan 27, the air in the tank 3 is guided from the suction port 21 into the circulation passage 9 and from the outlet 23 to the tank 3.
The cycle of returning to the inside is repeated.

The drying heater 25 is for heating the air in the circulation passage 9, and its operation is controlled by the temperature detecting means 31 such as a temperature sensor.

The temperature detecting means 31 is arranged in the circulation passage 9 and in the vicinity of the drying heater 25, and outside the drying heater 25, the circulation fan 27.
The operation control of is performed at the same time.

That is, when the surface temperature of the drying heater 25 reaches a predetermined temperature, it is detected and the circulation fan 27 is operated to manage the surface of the drying heater 25 not to exceed the predetermined temperature by the circulating air. In addition, when the temperature exceeds the predetermined temperature, the drying heater 25 is turned off and turned on and off according to the temperature so that a constant heating state can be obtained at all times.

On the other hand, the dehumidifying heat exchange section 29 is provided in a region forming the passage wall of the cooling passage 33 provided in parallel with the circulation passage 9 as shown in FIG. 1, and is made of a material having a high thermal conductivity. , Has a bellows shape formed of a thin plate. As a result, the contact area is expanded and the moisture in the passing air is removed by coming into contact with the dehumidifying heat exchange section 29.

The condensed water that has condensed on the wall surface of the dehumidifying heat exchange section 29 returns from the drain hole 35 to the water storage section 11.

In the cooling passage 33, when the cooling fan 37 rotates, cooling air flows from the intake 39 to the exhaust 41. The cooling fan 37 and the circulation fan 27 are coaxially arranged so that they can rotate together.

According to the dishwasher thus constructed, the washing water in the water storage portion 11 is sent to the washing nozzle 7 by the washing pump 13, so that the washing water is sprayed from the washing nozzle 7 to perform washing. . At this time, the cleaning water is heated by the heating heater 17, so that cleaning can be performed more efficiently than water.

After the cleaning is completed, the drainage pump 19 is operated to drain the cleaning water in the water storage section 11, and then the rinsing step is started.

A time chart from the rinsing step to the drying step is shown in FIG.

In FIG. 3, the drainage pump 19 is turned on only in the drainage step and is turned off in the other steps. The heater 17 is turned on during the rinsing process,
The drying process is turned off. Thereby, in the rinsing step, the heated rinsing water is sprayed from the cleaning nozzle 7,
Efficient rinsing is performed.

The heater 25 for drying is turned on during the rinsing process and is kept on until the end of the draining process and the drying process.

Assuming that the surface temperature of the drying heater 25 required for drying at the start of the drying process is TH, the time t required for the heater surface temperature to reach TH from T0 is t.
= Mh.ch (TB-T0) / Qin.

Note that mh is the mass of the heater, ch is the specific heat of the heater, and Qin is the heater input. As a result, the drying air that has been raised to a predetermined temperature at the same time as the start of the drying process is discharged from the tank 3
It is fed into the inside to raise the temperature of the dish surface and increase the water vapor pressure of the dish surface.

At this time, moisture moves due to the pressure difference from the steam pressure of the dry air. The dry air, which has absorbed water from the tableware and finished its work, and whose temperature has dropped, becomes high in humidity, is guided again into the circulation passage 9 from the suction port 21, and passes through the drying heater 25 and the dehumidifying heat exchange section 29.

During this passage, the heat exchange section 29 for dehumidification
Thus, the moisture is removed, and at the same time, the drying heater 25 heats it up to a predetermined temperature and sends it into the tank 3 again.

In this case, the power supply capacity is limited,
When it is difficult to input the heating heater 17 and the drying heater 25 at the same time, as shown in the time chart of FIG. 4, when the rinsing process is completed, the input to the heating heater 17 is finished and the draining process is performed. By starting the input to the drying heater 25 and heating the drying heater 25 before driving the circulation fan 27, that is, before starting the drying process, it is possible to accelerate the rise of the drying process. .

On the other hand, when the drying is completed, even if the tableware is taken out, there is no heater in the tank 3, so that it is not burned. Further, the cleaning of the inside of the tank 3 and the attachment, removal and cleaning of the residual food filter 15 can be easily performed.

[0040]

As described above, the dishwasher / dryer of the present invention has the following effects.

(A) When the tableware is taken in and out, the heater is not touched, and accidents such as deformation of the tableware and burns can be eliminated.

(B) The inside of the tank can be easily cleaned and the filter for the residual food can be easily cleaned and managed.

(C) Since the drying heater is heated before starting the drying step, the rising is quick and the drying can be efficiently performed.

(D) At the start of the drying process, the surface humidity of the drying heater can be optimally controlled to prevent the temperature of the drying heater from rising more than necessary.

[Brief description of drawings]

FIG. 1 is a schematic side view of cutting of a dishwasher / dryer according to the present invention.

FIG. 2 is a schematic cut rear view of the dishwasher.

FIG. 3 is a time chart diagram.

FIG. 4 is a time chart diagram.

[Explanation of symbols]

 3 Tank 7 Cleaning Nozzle 9 Circulation Passage 11 Water Storage Section 13 Pump 17 Heating Heater 25 Drying Heater 29 Dehumidifying Heat Exchange Section

Claims (3)

[Claims] 1. A cleaning nozzle for injecting cleaning water sent from a water reservoir by a pump into the tank, and a circulation fan for guiding the air in the tank to the outside of the tank and then feeding it again into the tank. A circulation passage, and a dehumidification heat exchange unit provided in the circulation passage for removing moisture in the air passing through the circulation passage, and a drying heater is provided in the circulation passage,
A dishwasher / dryer characterized in that heaters for heating the wash water in the water storage section are independently provided outside the tank. 2. The dishwasher / dryer according to claim 1, wherein the drying heater is preheated before the drying step in which the air in the tank is circulated through the circulation passage by the circulation fan. 3. The dish washing / drying apparatus according to claim 1, wherein a temperature detecting means is provided in the circulation passage, and operation of the drying heater and the circulation fan is controlled based on a detection signal from the temperature detecting means. Machine.