JPH0292330A - Automatic tableware washing machine - Google Patents

Abstract

PURPOSE:To prevent rinsing water from being polluted due to contamination stored in a washing filter by arranging a pair of filters at least arranged on the circulating passage of stored water and used to be selectively switched at the time of washing and at the time of rinsing. CONSTITUTION:A pair of cage type filters 23, 24 prepared for washing and rinsing, and rotary covers 25 for covering respective opening sections are combined with each other, and on the rotary covers 25, holes 25a for selecting the filters 23, 24 are formed. When tablewares 3 are washed with stored water including detergent, then contamination attached to the tablewares 3 is piled up in the washing filter 23, but when washing is shifted to rinsing, then the rotary cover 25 of a filter body 22 is half-rotated, and the opening section of the washing filter 23 is closed, and on one side, the opening section of the rinsing filter 24 is opened in a tank 4. As a result, fresh stored water fed into the tank 4, for rinsing is circulated in the tank 4 through the rinsing filter 24 including no stored contamination.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic dishwasher that suppresses contamination of reservoir water that is circulated for rinsing.

[Prior Art] The automatic dishwasher 1 shown in FIG. 6 is popular for household use, and dishes 3 arranged in a dish stocker 2 with shelves are set in a watertight tank 4. , water faucet 5
By connecting the water supply hose 6 to the tableware 3, a sequence controller (not shown) automatically controls all processes of washing, rinsing, and drying, and the tableware 3 can be automatically washed. In this automatic dishwasher 1, a rotary nozzle 9 is connected to a discharge pipe 8 of a circulation pump 7 in order to circulate and use the water stored in a tank 4. The stored water jetted from the rotating nozzle 9 washes the tableware 3 in the tableware stocker 2, and then flows back to the bottom of the tank.

The refluxed pooled water is sucked into the circulation pump 7 again through the rectangular dish-shaped filter unit 10 shown in FIG. 7, and is again used for washing dishes. During this time, dirt such as leftover food and oil stains that have been washed off the tableware 3 during washing are filtered when the stored water passes through the filter unit IO, and are deposited in one place.

After cleaning for a certain period of time is completed, the dirty water accumulated in the tank 4 is sucked into a drain pump (not shown) and then drained to the outside via the drain pipe 11. When the used water has been drained, fresh rinsing water is fed into the tank 4 from the faucet 5 again, and when it reaches a level slightly lower than the rotating surface of the rotating nozzle 9, the rinsing water is finished. will be started. Also at this time, the stored water sucked into the circulation pump 7 and injected from the rotary nozzle 9 rinses the tableware 3, and then passes through the filter unit 10 and is circulated for rinsing. Rinsing is performed several times until detergent and the like remaining on the tableware 3 are sufficiently washed away.

When the rinsing is completed, in order to dry the tableware 3, all the stored water used for rinsing is drained and the U-shaped sheathed heater 12, which had been submerged in the stored water, is energized. Since the heat generated by the sheathed heater 12 heats the metal body inside the tank 4, water droplets etc. adhering to the tableware 3 gradually evaporate and dry.

[Problems to be Solved by the Invention] The above-mentioned conventional automatic dishwasher 1 rinses the dirt removed by washing with the dirt accumulated on the filter unit 10, so the accumulated water used for rinsing removes the dirt. will be circulated through the filter unit 10 where it has accumulated,
Contamination of the newly replenished reservoir water itself was unavoidable.

Therefore, the tableware 3 that was washed in the previous process is also rinsed with contaminated water, which not only reduces the rinsing effect by half, but also causes problems such as being undesirable from a sanitary point of view. I was holding it.

Also, when drying dishes, the dirt accumulated in the filter unit 10 may be heated by the heat of the sheathed heater I2 and generate a bad odor. The problem was that the apparent cleaning effect was sometimes canceled out by the foul odor.

[Means for Solving the Problems] The present invention has solved the above problems, and is an automatic dishwasher that washes tableware stored in a tank while circulating stored water, and then rinses the dishes. The present invention is characterized in that it includes at least a pair of filters that are provided in the reservoir water circulation path and are used selectively during washing and rinsing.

[Function] According to the present invention, when tableware housed in a tank is washed while circulating stored water and then rinsed, at least one pair of filters provided in the circulation path of the stored water is By selectively switching between rinsing and washing,
To prevent rinsing water from being contaminated by dirt accumulated in a cleaning filter.

[Embodiments] Examples of the present invention will be described below with reference to FIGS. 1 to 5. Fig. 1.2 is a schematic perspective view and a longitudinal sectional side view showing an embodiment of the automatic dishwasher of the present invention, respectively, and Figs. 3 to 5 show cleaning of the filter unit shown in Fig. 1.2, respectively. It is a perspective view which shows the state at the time of washing, washing, and drying.

In FIG. 1.2, the structure of the filter unit 22 of the automatic dishwasher 21 is different from the conventional one, and in the embodiment,
A pair of 1-type filters 2 prepared for cleaning and rinsing
3. Combine the rotating lid 25 that covers each opening with 24 and rotate! 25 is formed with a hole 25a for selecting the filter 23, 24. The rotary lid 25 is connected to a motor 2 connected to a controller (not shown).
6, and as shown in FIGS. 3 to 5, holes 25a, which serve as a circulation path for stored water, are provided at the opening of the cleaning filter 23 during cleaning, and at the time of rinsing. It matches the opening of the rinsing filter 24, and functions to close both openings when drying dishes.

In other words, when washing the tableware 3 with stored water mixed with detergent, dirt such as leftover food and oil stains on the tableware 3 is removed.
The rotary lid 25 of the filter unit 22 accumulates in the cleaning filter 23, but when the cleaning is changed to the rinsing, the rotary lid 25 of the filter unit 22
rotates half a turn, closing the opening of the cleaning filter 23, while opening the opening of the rinsing filter 24 into the tank 4.

As a result, fresh water replenished into the tank 4 for rinsing circulates within the tank 4 through the rinsing filter 24 in which no dirt has accumulated.

Therefore, unlike in the conventional automatic dishwasher 1, the rinsing water itself is not contaminated by passing through the filter unit 10 where dirt has accumulated, and the rinsing effect is reduced by half, and it is better than the conventional dishwasher. By being able to use extremely clean rinsing water, the purpose of rinsing can be more than fulfilled.

In addition, in the embodiment, when drying the tableware 3 after rinsing, the openings of both filters 23 and 24 are connected to the rotary lid 25.
Since the configuration is such that filter 2 is blocked by
The dirt accumulated in 3 and 24 will not be heated and emit odor, and this will not only improve the cleaning effect visually, but also
It can give an impression of a clean cleaning feeling without unpleasant odors.

In the above embodiment, the filter unit 22 has one filter for cleaning and one for rinsing, but it is also possible to use two or more filters for each purpose, and it is also possible to use disposable filters. This can also facilitate post-processing. Further, these plurality of filters can be opened and closed not by the rotary lid 25 but by a horizontally movable sliding lid or a swinging door type lid.

[Effects of the Invention] As explained above, the present invention provides a method for cleaning tableware housed in a tank while circulating stored water, and then rinsing the tableware by using at least one of the Since the pair of filters is configured to be selectively switched between cleaning and rinsing, it is possible to prevent the rinsing water from being contaminated by dirt accumulated inside the cleaning filter. Unlike automatic dishwashers, the rinsing water passes through a filter filled with dirt, which contaminates the rinsing water itself and reduces its rinsing effectiveness by half.
It has excellent effects such as being able to more than adequately fulfill the purpose of rinsing with clean rinsing water.

Moreover, this invention provides a heater for drying dishes in the tank,
By keeping the filter airtight while the heater is drying the dishes, the dirt accumulated inside the filter will not be heated and emit an odor when the dishes are being dried. Needless to say, it has the effect of giving an impression of a clean and odorless cleaning feeling.

[BRIEF DESCRIPTION OF THE DRAWINGS] Figures 1 and 2 are schematic perspective views and longitudinal sectional side views showing one embodiment of the automatic dishwasher of the present invention, respectively, and Figures 3 to 5 are the same as those shown in Figures 1 and 2. FIG. 6.7 is a perspective view showing the states of the filter unit shown during washing, rinsing, and drying, respectively; FIG. be. 41. Tank, 71. Circulation pump 21° automatic dishwasher, 22, filter unit. 23.24. ,,filter,25. ,, rotating lid. 25a, hole, 26. ,,motor.

Claims (2)

[Claims] (1) An automatic dishwasher that washes tableware stored in a tank while circulating stored water, and then rinses the dishes,
An automatic dishwasher comprising at least a pair of filters which are provided in the reservoir water circulation path and are used selectively during washing and rinsing. (2) The automatic dishwasher according to claim 1, wherein a heater for drying dishes is provided in the tank, and the filter is kept in a closed state while the heater is drying the dishes.