JPH0246833Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a dishwasher equipped with a heat exchange tank in which water supplied to the rinse tank exchanges heat.
In particular, the present invention relates to a drainage device for a dishwasher that simultaneously drains hot water from a washing water storage tank and a heat exchange tank.

(b) Conventional technology For example, in Japanese Patent Application Laid-open No. 57-41585, a recovery tank is provided to recover hot water that overflows from a cleaning tank, and this recovery tank is divided into a plurality of tanks using a partition member, and the hot water is collected in each tank. A water supply pipe is arranged to exchange heat with the hot water, an outlet for the hot water is formed in the last tank of the plurality of tanks, and a drain port, which is normally closed by a drain valve, is provided at the bottom of the recovery tank. A device for utilizing waste heat of a dishwasher is disclosed.

(c) Problems to be solved by the invention In the above-mentioned conventional technology, when the cleaning operation for one day is completed and the drain port of the cleaning tank is opened,
The washing water is drained, but users tend to forget to operate the drain valve, and when they forget to operate the drain valve and forget to drain the washing water in the collection tank, the water contained in the washing water is stored in the collection tank. There has been a problem in that impurities that have been removed precipitate or adhere, resulting in poor heat exchange during the next cleaning operation. The present invention aims to solve the above problems.

(d) Means for Solving the Problems In order to solve the above problems, the present invention provides a washing water storage tank for storing washing water, a rinsing water storage tank for storing rinsing water, and the rinsing water storage tank. In a dishwasher equipped with a heat exchange pipe through which water is sent to and a heat exchange tank through which washing water is sent from the washing water storage tank, an overflow pipe provided in the washing water storage tank and , a connecting pipe that communicates the overflow pipe with a lower part of the heat exchange tank, and a drain port for the heat exchange tank that drains the cleaning hot water in the heat exchange tank into the cleaning hot water storage tank through the connecting pipe. , first and second seal members for freely opening and closing a cleaning hot water storage tank drain port formed on the bottom wall of the cleaning hot water storage tank, the cleaning hot water storage tank drain port and the heat exchange tank drain port; and,
The present invention provides a drainage device for a dishwasher that includes an operating device that simultaneously opens and closes the first and second seal members.

(e) Action When draining the washing hot water in the washing water storage tank and heat exchange tank, the first,
The second seal member moves upward, and both the heat exchange tank drain port and the wash water storage tank drain port are opened, and the wash hot water from the wash water storage tank and the heat exchange tank is drained through both drain ports. .

(F) Embodiment An embodiment of the present invention will be described in detail below with reference to FIGS. 1 and 2.

Reference numeral 1 shown in Fig. 2 is a dishwasher according to the present invention, in which a washing chamber 3 that is open to a door body 2 that can be raised and lowered is partitioned at the upper part of the main body, and washing nozzles are installed above and below this washing chamber 3. 4, 4 and rinsing nozzles 5, 5 are arranged, between which a rack 7 for storing objects 6 to be cleaned is placed on a support rail 8. Further, a cleaning hot water storage tank 10 and a rinsing hot water storage tank 11 are provided below the cleaning chamber 3, and the cleaning hot water storage tank 10 whose upper surface is covered with a strainer 10C has water flowing through the cleaning nozzles 4, 4 during the cleaning operation. Washing pump 12 that pumps washing hot water
is provided, and an overflow pipe 1 is provided.
3. A branch pipe 14 connected to the lower end of this overflow pipe, an operating device 16 equipped with a first seal member 15 that can open and close the cleaning water storage tank drain port 10A, and a cleaning water heating device 1 such as an electric heater.
7th grade is provided. Also, rinsing water storage tank 11
is provided with a rinsing pump 18 that pumps rinsing water to the rinsing nozzles 5 during rinsing operation, and is provided with a water supply pipe 20 opening at the top and provided with a water supply control float 19. Furthermore, 21 is a high-temperature water heater that heats the rinsing water, and this high-temperature water heater has a heat exchanger 21A and a gas burner 21.
It is composed of B.

Furthermore, 22 is a heat recovery device installed next to the washing hot water storage tank 10, and the heat recovery device 22 is a heat exchanger tank 2.
3, and a water supply pipe 2 which is arranged in a meandering manner inside this tank.
0, a plurality of partition plates 25, and a drain pipe 23A opened at the upper part of the side wall of the heat exchange tank 23.
A connecting pipe 26 connected to the side surface of the branch pipe 14 is connected to the lower part of the branch pipe 14 .

Hereinafter, the main parts of the present invention will be explained in detail based on FIG. In FIG. 1, the same reference numerals as in FIG. 2 are the same.

The branch pipe 14 to which the lower part of the overflow pipe 13 is connected and the connecting pipe 26 is connected is supported by branch pipe fixing plates 27, 27 at a distance from the bottom wall 10B of the washing hot water storage tank 10. and,
At the bottom of the branch pipe 14 is a drain port 1 for the heat exchange tank.
4A is formed, and a second sealing surface 14B is formed on the peripheral edge of this drain port 14A so as to be inclined inwardly and downwardly. In addition, the opening area of the cleaning hot water storage tank drain port 10A located below the drain port 14A is
wider, its periphery slopes downwards inwardly and has a first
A sealing surface 10a is formed. Furthermore, above the first seal member 15 of the operating device 16, there is a second seal member 30 that freely opens and closes the drain port 14A.
is installed. Further, the operating device 16 passes inside the overflow pipe 13, and a drain handle 16A is formed at the upper part of the overflow pipe 13, which extends upward from the upper end thereof. Furthermore, since the connection part of the drain pipe 23A to the heat exchange tank 23 is located below the upper end of the overflow pipe 13, the water level of the cleaning hot water in the heat exchange tank 23 is below the upper end of the overflow pipe 13, and the cleaning hot water storage The water level is below the water level of the washing hot water in the tank 10.

Here, in a normal cleaning cycle, even if the cleaning operation is started and the cleaning hot water in the cleaning hot water storage tank 10 is force-fed to the cleaning nozzles 4, 4, and the water level of the cleaning hot water decreases, the overflow pipe as described above 1
3 is located above the water level of the wash water in the heat exchange tank 23, so the wash water in the heat exchange tank 23 does not flow into the wash water storage tank 10. Also, the cleaning hot water that overflows from the upper end of the overflow pipe 13 passes through the connecting pipe 26 and is transferred to the heat exchange tank 23.
flows to Further, when the cleaning cycle is completed and the cleaning hot water in the cleaning hot water storage tank 10 and the heat exchange tank 23 is to be drained, hold the drain handle 16A and pull up the operating device 16, rotate the drain handle 16A by 90 degrees, and remove the strainer. By placing it on the top surface of 10C as shown by the chain line,
Both the first and second seal members 15 and 30 move upward as shown by the chain lines, and both the wash water storage tank drain port 10A and the heat exchange tank drain port 14A are opened, and the wash water storage tank 10 is opened. The cleaning hot water is drained through the cleaning hot water storage tank drain port 10A, and is then drained to the heat exchange tank 23.
The cleaning hot water is drained through the drain port 14A and the cleaning hot water storage tank drain port 10A. After the drainage is finished,
When performing the cleaning operation again, remove the drain handle 1.
6A and rotate it 90 degrees again and lower the operating device 16 to remove the first and second seal members 15,
30, both the cleaning hot water storage tank drain port 10A and the drain port 14A are closed, and the cleaning cycle is performed after storing the cleaning hot water.

Therefore, since the water level of the cleaning hot water in the heat exchange tank 23 is always below the upper end of the overflow pipe 13, even if the water level of the cleaning hot water in the cleaning hot water storage tank 10 drops during a normal cleaning cycle, the water level of the cleaning hot water in the heat exchange tank 23 is always lower than the upper end of the overflow pipe 13. Cleaning water does not flow into the tank 10,
It is possible to avoid a drop in the temperature of the cleaning hot water used in the cleaning operation, the cleaning operation can be performed with cleaning hot water at a predetermined temperature, and the operating time of the cleaning hot water heating device 17 can be reduced because the temperature is below the cleaning hot water. This can be avoided and the operating cost can be reduced.

Furthermore, by pulling up the operating device 16, the cleaning hot water storage tank drain port 10A and the heat exchange tank drain port 14A can be opened at the same time. At the same time, the water can be drained, impurities in the heat exchange tank 23 can also be drained, and as a result, a decrease in heat exchange can be avoided.

In the above embodiment, the branch pipe 14 was connected to the overflow pipe 13, but instead of using the branch pipe, the lower end of the overflow pipe 13 was extended downward to connect the lower part of the side wall of the overflow pipe 13 and the heat exchange tank. The connecting pipe 26 may be connected to the connecting pipe 26.

(g) Effects of the invention Since the invention is a draining device for a dishwasher constructed as described above, when draining the washing hot water from the washing water storage tank and the heat exchange tank, by pulling up the operating device, the first To move a second sealing member upward and simultaneously open a wash water storage tank drain port and a heat exchange tank drain port to drain not only the wash water storage tank but also the wash water of the heat exchange tank at the same time without forgetting. Therefore, impurities in the heat exchange tank can also be drained, and as a result, a decrease in heat exchange can be avoided.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
FIG. 1 is an enlarged longitudinal sectional view of the main parts of the dishwasher, and FIG. 2 is an overall longitudinal sectional view of the dishwasher. 10...washing water storage tank, 10A...washing water storage tank drain port, 11...rinsing water storage tank, 13...overflow pipe, 14A...heat exchange tank drain port, 15...first seal member, 16... Operating device, 17... Wash water heating device, 23... Heat exchange tank, 23A... Drain pipe, 24... Heat exchange pipe, 26... Connecting pipe, 30... Second sealing member.

Claims (1)

[Scope of utility model registration request] A washing water storage tank for storing washing water, a rinsing water storage tank for storing rinsing water, and a heat exchange pipe through which water is sent to the rinsing water storage tank are installed, and the washing water is removed from the washing water storage tank. A dishwasher equipped with a heat exchange tank to which water is sent, an overflow pipe provided in the washing hot water storage tank, a connecting pipe that communicates the overflow pipe with a lower part of the heat exchange tank, and the connecting pipe. a heat exchange tank drain port for draining the cleaning hot water in the heat exchange tank into the cleaning hot water storage tank through the cleaning water tank; a cleaning hot water storage tank drain port formed on the bottom wall of the cleaning hot water storage tank; The method further comprises: first and second seal members that open and close the hot water storage tank drain port and the heat exchange tank drain port, and an operating device that simultaneously opens and closes the first and second seal members. Features a dishwasher drain device.