JP2005334344A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized dishwasher excellent in productivity with less components, for which a failure is not generated even when a hot water tank is a plastic molded article. <P>SOLUTION: In the dishwasher comprising a washing tub, a jetting nozzle provided inside the washing tub, the hot water tank 4 provided outside the washing tub for heating supplied water by a heating means 5 and a hot water supply pump 6 for supplying hot water from the hot water tank 4 to the washing tub, the hot water tank 4 has an overflow part 23 for making the water overflow when the water inside the hot water tank 4 reaches more than a certain level and a communicating part 23a provided on the bottom part of the overflow part 23 and communicating with the washing tub. The hot water is supplied from the hot water tank 4 to the washing tub through the overflow part 23 and the communicating part 23a and the overflowing water is made to flow from the communicating part 23a to the washing tub 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a dishwasher, and more particularly to a structure of a dishwasher provided with a hot water storage tank outside a washing tank.

  In the conventional dishwasher, a washing tank for storing washing water is provided at the bottom of the washing chamber, and a first overflow pipe for discharging washing water exceeding the first set water level to the outside is arranged in the washing tank. It is installed. A hot water storage tank 6 for storing rinsing water is disposed outside the cleaning chamber, and a second overflow pipe is provided in the hot water storage tank to overflow the rinsing water exceeding the second set water level. The lower end opening of the second overflow pipe is connected to the drainage path of the wash water, and the upper end opening of the second overflow pipe is set at a position higher than the first set water level in the wash tank (for example, Patent Document) 1).

JP 2002-253465 A (paragraphs 0008 to 0018, FIG. 1)

In the conventional dishwasher, the hot water storage tank is provided with a second overflow pipe as a separate part that overflows the rinse water exceeding the second set water level. The lower end opening of the second overflow pipe It is connected to the drainage channel and has a long length, which increases the number of parts and space.
Further, when the hot water storage tank is a plastic molded product, there is a problem that a problem occurs due to the heat of the heater.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a dishwasher that has a small number of parts and good productivity, and that does not cause a problem even when the hot water storage tank is a plastic molded product. .

  In the dishwasher according to the present invention, a cleaning tank for cleaning dishes, a spray nozzle that is provided inside the cleaning tank and sprays cleaning water toward the dishes, and provided outside the cleaning tank, A hot water storage tank that heats the water supplied by the heating means, and a hot water supply pump that supplies hot water from the hot water storage tank to the washing tank, and the hot water storage tank has the water in the hot water storage tank when the water is above a certain level. An overflow part for overflowing the water, and a communication part provided at the bottom of the overflow part and communicating with the cleaning tank, and supplying hot water from the hot water storage tank to the cleaning tank. While performing via a communicating part, the overflowed water is poured from the communicating part to the washing tank.

  According to the present invention, the hot water storage tank has an overflow part for overflowing water when the water in the hot water storage tank becomes a certain level or more, and a communication part provided at the bottom of the overflow part and communicating with the cleaning tank. The hot water supply from the hot water storage tank to the washing tank is performed through the overflow part and the communication part, and the overflowing water is allowed to flow from the communication part to the washing tank. Also, it can be downsized.

  FIG. 1 is a cross-sectional view of a dishwasher according to an embodiment of the present invention, FIG. 2 is a front view of a hot water storage tank of the dishwasher, FIG. 3 is a cross-sectional view taken along line AA in FIG. FIG. 5 is a conceptual diagram showing the operation of the dishwasher, and FIG. 6 is another configuration diagram of the water flow control means of the hot water storage tank.

FIG. 1 shows an example of a dishwasher provided on a sink or the like and having a lid on the upper surface. The main body 1 of the dishwasher is provided with a cleaning tank 2 having an opening in the upper part and an opening of the cleaning tank 2. The hot water storage tank 4 which is arrange | positioned on the outer side of the washing tank 2 by the lid | cover 3 and the front door 101 side of the sink and which has the heater 5 in the inside and the hot water supply pump 6 in the lower part is provided.
Further, an injection nozzle 7 for injecting cleaning water to the lower part of the cleaning tank 2, a hot water reservoir 8 for storing the cleaned cleaning water, and an injection / drainage pump 9 for sending the cleaning water to the injection nozzle 7 and for discharging water are provided. The drainage pump 9 and the injection nozzle 7 are connected by a water supply pipe 10, the hot water reservoir 8 and the injection / drainage pump 9 are connected by a water supply pipe 11, and the drainage pipe 12 is connected to the injection / drainage pump 9. An operation unit 13 is provided above the front door 101 side. Although not shown, the reservoir 8 is provided with a filter, and the control means is provided inside the operation unit 13.

Next, as shown in FIGS. 2 and 3, the hot water storage tank 4 includes an outer shell composed of a tank body 15 having an opening and a lid body 16 that covers the opening of the tank body 15. Each 16 is integrally formed of plastic. The inside of the tank body 15 is partitioned by a partition plate 23b, and an overflow part 23 is provided to overflow the hot water when the water in the hot water storage tank body 15 exceeds a certain level. A short cylindrical communication portion 23a is provided in communication with the communication portion 23a. The communication part 23a is connected to a short cylindrical cleaning tank communication part 2a provided on the side wall of the cleaning tank 2 via a seal packing.
Further, a hot water supply port 21B is provided on the hot water supply pump 6 connected to the water intake 18 provided at the bottom of the tank body 15 via the hot water supply pipe A19, and the lid body 16 positioned above the hot water supply pump 6 and the overflow portion 23. A hot water supply pipe B21 is provided so as to protrude from the lid 16 to the inside. A temperature sensor 27 for detecting the temperature of hot water is provided on the bottom surface of the tank body 15.
The upper tip position of the partition plate 23b, which is the overflow position of the overflow portion 23, is set higher than the water level so that the water does not overflow even if the water surface rises due to the increase in the volume of water due to heating.
Further, the water intake 18 is provided at a position one level lower than the bottom surface of the tank body 15 so that the hot water of the tank body 15 is not left in the tank body 15 when the hot water of the tank body 15 is sent by the hot water supply pump 6.

  Further, a water supply pipe 17 for supplying water from the outside is connected to the water supply port 17 a of the cover body 16, and this water supply port 17 a is an edge of the cover body 16 and in the vicinity of the side wall surface of the tank body 15. It is provided so that it may be located in. Further, a plate-like body 26 is provided as water flow control means for allowing water supply from the water supply port 17a to flow along the side wall surface of the tank main body 15. The plate-like body 26 faces the water supply port 17a and The lower end g of the main body 15 is inclined so as to be close to the side wall surface. The plate-like body 26 is formed integrally with the lid body 16 and is the same as or smaller than the width of the tank body 15.

The lid body 16 is provided with a pressure type water level sensor 24 for detecting the water level of the hot water storage tank 4, and an air reservoir 25 of the pressure type water level sensor 24 is provided integrally with the lid body 16. A heat shielding plate 20 that shields the heat of the heating unit 5 is provided along the inner surface of the tank body 15. The heat shielding plate 20 is formed by bending a metal plate, and is provided with side surfaces 20a, 20b, 20c20d erected from the bottom surface 20e.
The heat shield plate 20 has such a size that the air reservoir 25 of the pressure type water level sensor 24 is located between the heat shield plate 20 and the side wall surface of the tank body 15.

Next, the operation will be described with reference to FIG. First, for example, when a cleaning course is selected and started on the operation panel 13, the water supply valve 22 is opened, and water is supplied from the outside to the hot water storage tank 3 through the water supply pipe 17 and begins to be stored. At this time, the water flowing out from the water supply port 17 a of the water supply pipe 17 hits the plate-like body 26, the water flow direction is changed to the side wall surface direction of the tank main body 15, and the water flows along the side wall surface of the tank main body 15. For this reason, since water accumulates in the tank body 15 and the water surface is not disturbed when the water level rises, the pressure fluctuation of the air reservoir 25 of the pressure water level sensor 24 described later can be prevented, and the detection of the water level can be stabilized. it can.
In addition, when the water level sensor 24 does not operate due to a malfunction or the like, or even if the water level of the tank body 15 rises from the set water level due to an increase in the volume of water due to heating, the water flows from the partition plate 23b to the overflow portion 23. Don't be.

  When water is stored in the hot water storage tank 4 and the water level set by the water level detection sensor 24 is detected, the water supply valve 22 is closed and the water is heated. And it supplies with electricity to the heating means 5 until it becomes temperature suitable for washing | cleaning. When the temperature detected by the temperature detecting means 27 reaches an appropriate temperature, the energization of the heating means 5 is stopped, the hot water supply pump 6 is operated, and the hot water supply pump 6 is operated from the water intake 18 at the bottom of the hot water storage tank 4 to the hot water supply pump 6 via the hot water supply pipe A19. Hot water is taken in and poured into the overflow part 23 from the hot water supply port 21a through the hot water supply pipe B21, and hot water is supplied to the cleaning tank 2 through the communication port 23a. Then, after hot water is supplied to the washing tub 2 by operating for a predetermined time, the hot water supply pump 6 is stopped.

  Next, when the injection / drainage pump 9 starts to operate by injection, the hot water stored in the cleaning tank 2 is pumped from the hot water reservoir 8 as the cleaning water to the injection nozzle 7 toward the dishes (not shown). Be injected. The sprayed wash water gathers in the hot water reservoir 8 and is pumped to the spray nozzle 7 by the spray / drainage pump 9 to repeatedly spray toward the dishes, and the dishes are washed while the wash water circulates.

  When cleaning starts, the water supply valve 22 of the hot water storage tank 4 opens in parallel, and water is supplied from the outside to the hot water storage tank 4 through the water supply pipe 17 and starts to be stored. When water is stored in the hot water storage tank 4 and the set water level is detected by the water level sensor 24, the water supply valve 22 is closed, the water is heated, and the heating means 5 is energized until it reaches a temperature suitable for rinsing. When the temperature detected by the temperature detection means 27 reaches an appropriate temperature, the energization to the heating means 5 is temporarily stopped, but the heating means 5 is intermittently energized so as to maintain the appropriate temperature until the cleaning for a predetermined time is completed. To do.

  When the predetermined time elapses and the cleaning is completed, the spraying operation of the jet / drain pump 9 is stopped, and the cleaning water in the cleaning tank 2 is drained outside the machine body, including the draining operation. After the jet / drain pump 9 performs the drain operation for a predetermined time, the jet / drain pump 9 stops. Thereafter, the hot water supply pump 6 is operated to supply hot water from the hot water storage tank 4 to the cleaning tank 2, and after operating for a predetermined time, the hot water supply pump 6 stops.

  Next, when the injection / drainage pump 9 starts to operate by injection, the hot water stored in the washing tank 2 is pumped from the hot water reservoir 8 to the injection nozzle 7 as rinse water, and is injected toward the dishes. The sprayed rinse water gathers in the hot water reservoir 8 and is pumped to the spray nozzle 7 by the spray / drain pump 9 to repeatedly spray toward the dishes, and the dishes are rinsed while the rinse water circulates. When the rinsing is completed, the spraying operation of the spray / drain pump 9 is stopped, and the cleaning water in the cleaning tank 2 is drained outside the machine body, including the draining operation. After the jet / drain pump 9 performs the drain operation for a predetermined time, the jet / drain pump 9 stops. Thereafter, the hot water supply pump 6 is operated to supply hot water from the hot water storage tank 3 to the cleaning tank 2. After operating for a predetermined time, the hot water supply pump 6 is stopped and rinsed again. Usually, rinsing is performed a plurality of times.

  Next, although not shown, outside air is sent to the hot water storage tank 4 without water by the blowing means, and the air heated by the heating means 5 and heated by the pressure of the blowing means is sent from the communication hole 23a to the cleaning tank 2. Then, the tableware is dried to complete the cleaning process.

  As described above, the hot water storage tank is composed of an overflow part for overflowing water when the water in the hot water storage tank exceeds a certain level, and a communication part provided at the bottom of the overflow part and communicating with the cleaning tank. And supplying hot water from the hot water storage tank to the washing tank via the overflow part and the communication part, and flowing the overflowed water from the communication part to the washing tank. Well, it can be downsized.

  Since the water supply port of the hot water storage tank is provided in the vicinity of the side wall surface of the hot water storage tank and provided with water flow control means for allowing the water supply from the water supply port to flow along the side wall surface, the water level of the hot water storage tank 4 is not disturbed. Therefore, the water level detection accuracy can be increased.

  Further, since the water flow control means is a plate-like body (material) or bowl-like body that faces the water supply port and is inclined so that the lower end is close to the side wall surface, the hot water storage tank 4 has a simple structure. Since the water level is not disturbed, the water level detection can be stabilized.

  The tank body and lid of the hot water storage tank are plastic molded and provided with a heat shield plate that shields the heat of the heating means along the inner surface of the tank body. Can be prevented.

  Further, since the communication portion 23a of the overflow portion 23 of the tank body 15 is directly connected to the short cylindrical cleaning tank passage portion 2a provided on the side wall of the cleaning tank 2, a hot water supply pipe from the hot water supply tank 4 is unnecessary. It can be.

  Further, the air reservoir 25 can be integrated with the lid body 16 by using the pressure type water level sensor 24 for water level detection.

  Further, since the water intake 18 is provided at a position one step lower than the bottom surface of the tank body 15, hot water can be prevented from remaining in the tank body 15.

  Since the overflow part 23 is provided, water can be smoothly overflowed even when the water level rises rapidly.

  Since the overflow part 23 is integrally formed as a part of the tank main body 15, the number of parts can be reduced.

In the present embodiment, the lid 3 is provided on the counter side of the sink, and the tableware is taken in and out from the upper surface. The same effect can be achieved even with an independent aircraft.
Further, a floating water level sensor may be used instead of the pressure type water level sensor 24.

  Further, in the present embodiment, the water flow control means uses the inclined plate-like body 26 as shown in FIG. 2, but the water flow control means has a semicircular cross section as shown in FIG. ) Having a bent portion in the cross section shown in FIG. 5, and may be parallel to the side wall surface of the hot water storage tank 15 or may be inclined. Moreover, as shown in FIG.6 (b), the plate-shaped body provided in parallel with the hot water storage tank 15 side wall surface may be sufficient. FIG. 6A is a partial cross-sectional view of the hot water storage tank 15.

It is sectional drawing which looked at the dishwasher which shows embodiment of this invention from the side. It is sectional drawing of the water storage tank accommodated in the dishwasher which shows embodiment of this invention. FIG. 3 is a cross-sectional view of FIG. 2. It is a perspective view of the heat shielding board provided in the water storage tank in the dishwasher which shows embodiment of this invention. It is a conceptual diagram which shows the operation | movement in the dishwasher which shows embodiment of this invention. It is a block diagram of the plate-shaped body which controls the water flow of the water supply provided in the water storage tank in the dishwasher which shows embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airframe, 2 Washing tank, 4 Hot water storage tank, 5 Heating means, 6 Hot water supply pump, 7 Injection nozzle, 20 Heat shielding plate, 23 Overflow part, 23a Communication part, 26 Water flow control means.

Claims (4)

A washing tank for washing dishes,
An injection nozzle that is provided inside the cleaning tank and injects cleaning water toward the dishes;
A hot water storage tank that is provided outside the washing tank and heats the water supplied by the heating means;
A hot water supply pump for supplying hot water from the hot water storage tank to the washing tank,
The hot water storage tank has an overflow portion for overflowing the water when the water in the hot water storage tank exceeds a certain level;
A communication portion provided at the bottom of the overflow portion and communicating with the cleaning tank;
With
A dishwasher characterized in that hot water is supplied from the hot water storage tank to the washing tank through the overflow part and the communication part, and overflowed water is allowed to flow from the communication part to the washing tank.   The water supply port of the hot water storage tank is provided in the vicinity of the side wall surface of the hot water storage tank, and water flow control means is provided to allow water supply from the water supply port to flow along the side wall surface. Dishwasher.   3. The dishwasher according to claim 2, wherein the water flow control means is a plate-like body or a bowl-like body provided so as to be opposed to the water supply port and inclined so that the lower end is close to the side wall surface. The tank main body and lid of the hot water storage tank are formed of plastic, and are provided with a heat shielding plate that shields the heat of the heating means along the inner surface of the tank main body. Dishwasher.

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