JP4477786B2 - Dishwasher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dishwasher, and more specifically, an overflow pipe of a hot water storage tank is connected to a drainage path connected to the washing tank, and rinse water overflowing through the pipe is discharged to the outside through the drainage path. The present invention relates to a dishwasher configured as described above.
[0002]
[Prior art]
2. Description of the Related Art A dishwasher that automatically cleans a large number of dishes such as dishes, teacups, and cups that have been used for eating and drinking has been installed mainly in kitchens of coffee shops and restaurants, and is preferably used for business purposes. The schematic configuration of the dishwasher will be described. As shown in FIG. 3, the dishwasher 10 has a washing water used for washing dishes at the bottom of a washing chamber 14 defined in the upper side of the main body 12. A drainage path 22 composed of a joint 18 and a drainage hose 20 is connected to the bottom of the washing tank 16 through the joint 18. Further, a first overflow pipe 24 is provided in the cleaning tank 16 to allow the cleaning water exceeding the first set water level A to overflow from the upper end opening 24a. The lower end opening 24b of the pipe 24 is connected to the joint 18. The overflow wash water is configured to be discharged to the outside through the drainage path 22. The first overflow pipe 24 is configured to be detachable from the joint 18, and by removing the pipe 24 from the joint 18, all the cleaning water in the cleaning tank is made outside via the drainage path 22. It can be discharged.
[0003]
A hot water storage tank 26 for storing rinsing water (hot water) used for rinsing tableware is disposed below the washing chamber 14, and the hot water storage tank 26 exceeds a second set water level B. A second overflow pipe 28 is provided to allow the rinse water to overflow from the upper end opening 28a. The lower end opening 28b of the second overflow pipe 28 is connected to the joint 18 through a connection hose 30. The rinse water overflowing through the pipe 28 passes through the same drainage path 22 as the washing water. It is configured to be discharged to the outside.
[0004]
[Problems to be solved by the invention]
In the dishwasher 10, the hot water storage tank 26 defined by the upper end opening position of the second overflow pipe 28 from the first set water level A of the washing tank 16 defined by the upper end opening position of the first overflow pipe 24. The second set water level B is set low. In this case, as described above, when the first overflow pipe 24 is removed from the joint 18 and the washing water in the washing tank is completely discharged, the pressure applied to the water surface in the washing tank is high, so the connection hose 30 and the first There was a risk that the wash water would flow back into the hot water storage tank 26 via the two overflow pipes 24. Therefore, conventionally, a check valve 32 is inserted between the connection hose 30 and the joint 18 to prevent the backflow of the washing water. For this reason, the number of parts increases and the manufacturing cost increases.
[0005]
OBJECT OF THE INVENTION
The present invention has been proposed in view of the above-mentioned drawbacks inherent in the prior art described above, and has been proposed to suitably solve this problem, and it is possible to prevent the backflow of cleaning water to the hot water storage tank with a simple configuration. The object is to provide a dishwasher.
[0006]
[Means for Solving the Problems]
In order to solve the above problems and achieve the intended purpose, a dishwasher according to the present invention includes:
A cleaning tank in which the cleaning water is stored, a hot water storage tank in which the rinsing water is stored, and an overflow pipe that is disposed in the hot water storage tank and causes the rinsing water to overflow from the upper end opening. In the dishwasher connected to the washing water drainage path of the washing tank,
The upper end opening of the overflow pipe is set at a position higher than a set water level of the cleaning water stored in the cleaning tank.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, a dishwasher according to the present invention will be described in detail below with reference to the accompanying drawings by giving a preferred embodiment. The basic structure of the dishwasher is the same as that of the dishwasher described in the prior art with reference to FIG. 3, so that the same reference numerals are given to the same members already described, and a detailed description thereof is given. Is omitted.
[0008]
As shown in FIG. 1, the dishwasher 10 according to the embodiment includes cleaning nozzles 34, 34 that rotate horizontally by the reaction force of cleaning water and rinsing water in a cleaning chamber 14 that is defined inside the main body 12. Rinsing nozzles 36, 36 that rotate horizontally by the jetting reaction force are respectively arranged vertically opposite to each other. Note that an opening that is opened and closed by a door is disposed on the front surface of the main body 12 corresponding to the cleaning chamber 14, and a tableware rack (none of which is shown) in which tableware is stored through the opening. The cleaning nozzles 34 and 34 and the rinsing nozzles 36 and 36 are accommodated.
[0009]
A cleaning tank 16 for storing cleaning water mixed with detergent is provided at the bottom of the cleaning chamber 14, and the cleaning water stored in the tank 16 is supplied to the cleaning nozzles 34, 34 via a cleaning pump 38. The nozzles 34 and 34 are configured to be sprayed toward the tableware from the spray holes (not shown) of the nozzles 34 and 34. Note that the cleaning water used for cleaning is collected in the cleaning tank 16 and recirculated. The cleaning tank 16 is provided with a first overflow pipe 24 that overflows the cleaning water that has exceeded the first set water level A from the upper end opening 24a and discharges it to the outside. Further, the lower end opening 24 b of the first overflow pipe 24 is detachably connected to the joint 18 of the drainage passage 22 connected to the bottom of the cleaning tank 16 as described above, and the overflow overflowing through the pipe 24 is washed. Water is discharged from the drainage path 22 to the outside.
[0010]
A hot water storage tank 26 for storing rinsing water (hot water) is disposed outside the cleaning chamber 14 at a position above the cleaning tank 16, and rinse water is supplied to the hot water storage tank 26 by a quantitative water supply mechanism 40. It is stored at the third set water level C. This fixed amount water supply mechanism 40 includes a hot water supply pipe 42 which is led out from a hot water generator (not shown) and connected to the upper portion of the hot water storage tank 26, a water valve 44 which is disposed in the hot water supply pipe 42 and can be opened and closed, and a hot water storage tank. 26 includes a float switch 46 that detects that the rinsing water supplied into the water 26 has reached the third set water level C. The rinsing water in the hot water storage tank 26 is held at the third set water level C by controlling the opening and closing of the water valve 44 based on the on / off operation of the float switch 46.
[0011]
Rinsing water stored in the hot water storage tank 26 is configured to be pumped to the rinsing nozzles 36 and 36 via a rinsing pump 48, and is sprayed from the injection holes (not shown) of the nozzles 36 and 36 toward the dishes. After that, it is collected in the washing tank 16 in the same manner as the washing water and used as washing water. In addition, heaters 50 and 52 and a thermostat (not shown) are disposed inside the hot water storage tank 26 and the washing tank 16 so that the rinse water can be kept at about 80 ° C. and the washing water can be kept at about 60 ° C., respectively. It is configured.
[0012]
As shown in FIG. 2, the hot water storage tank 26 is provided with a second overflow pipe 28 for overflowing the internal rinse water. The upper end opening 28a of the second overflow pipe 28 is set above the third set water level C, and the water level in the hot water storage tank 26 is higher than the third set water level C. When B is exceeded, the excess rinse water overflows. The lower end opening 28b of the second overflow pipe 28 extending downward from the bottom of the hot water storage tank 26 is connected to the joint 18 of the drainage passage 22 connected to the cleaning tank 16 through a connection pipe 54. The rinse water overflowing from the hot water storage tank 26 to the pipe 28 can be discharged to the outside through the drainage path 22.
[0013]
The upper end opening 28a of the second overflow pipe 28 is set at a position higher than the first set water level A (the upper end opening position of the first overflow pipe 24) in the cleaning tank 16. Incidentally, the difference in height between the upper end opening 28a of the second overflow pipe 28 and the upper end opening 24a of the first overflow pipe 24 completely discharges the wash water stored in the wash tank up to the first set water level A. In this case, the cleaning water is set to a value that does not flow back to the hot water storage tank 26 via the connection pipe 54 and the second overflow pipe 28.
[0014]
The hot water storage tank 26 is provided with an overflow switch 56 for detecting when the water level in the tank reaches the second set water level B. When the switch 56 is activated, an alarm is issued to the user. It is configured to inform you.
[0015]
[Effect of the embodiment]
Next, the operation of the dishwasher according to the embodiment will be described. When the operation of the dishwasher 10 is started, initial water supply to the hot water storage tank 26 and the cleaning tank 16 is first performed. That is, after rinsing water is once stored in the hot water storage tank 26 to the third set water level C, the rinsing pump 48 is driven to inject the rinsing water into the washing chamber 14 by the rinsing nozzles 36, 36, and the washing tank 14 The rinsing water that serves as the cleaning water is stored in the cleaning tank 16 up to the first set water level A by repeating the process of collecting in 16 a plurality of times.
[0016]
In order to diagnose whether or not the overflow switch 56 provided in the hot water storage tank 26 is normally operated during the initial water supply, the hot water storage tank 26 is intentionally defined by the second overflow pipe 28. Rinsing water is supplied beyond the second set water level B. At this time, the rinse water discharged from the upper end opening 28 a of the second overflow pipe 28 is discharged to the outside through the drainage path 22.
[0017]
As described above, when the operation of the dishwasher 10 is started in the state where the rinsing water and the washing water are stored up to the set water levels C and A in the hot water storage tank 26 and the washing tank 16, respectively, the washing process is started. That is, the cleaning water in the cleaning tank 16 is pumped to the cleaning nozzles 34 by the cleaning pump 38 and sprayed into the cleaning chamber, thereby cleaning the dishes. After a predetermined rest time, the rinsing process is started, and the rinsing water in the hot water storage tank 26 is pumped to the rinsing nozzles 36 and 36 by the rinsing pump 48 and sprayed into the washing chamber 14, thereby rinsing the dishes. Meanwhile, rinse water is supplied to the hot water storage tank 26 up to the third set water level C by the quantitative water supply mechanism 40 and stored, and waits for the next cleaning cycle.
[0018]
Here, since the cleaning water in the cleaning tank 16 is mixed with filth removed from the dishes, the cleaning water is completely discharged at the end of the operation. That is, by removing the first overflow pipe 24 from the joint 18, all of the cleaning water in the cleaning tank is discharged to the outside through the joint 18 and the drain hose 20. In this case, since the upper end opening 28a of the second overflow pipe 28 is set at a position higher than the first set water level A in the cleaning tank 16, the cleaning water discharged from the cleaning tank 16 is supplied to the connecting pipe. The hot water storage tank 26 does not flow back through the second overflow pipe 28 and the second overflow pipe 28, and the rinse water is prevented from being contaminated. In addition, since the embodiment does not use a check valve or the like for preventing the backflow of the cleaning water, the configuration can be simplified and the number of parts can be reduced to reduce the manufacturing cost.
[0019]
In the embodiment, rinsing water that has been preliminarily warmed is supplied to the hot water storage tank. However, normal temperature water may be supplied to the hot water storage tank, and then heated by a heater in the tank.
[0020]
【The invention's effect】
As described above, according to the dishwasher according to the present invention, when the washing water is completely discharged from the washing tank, the washing water does not flow backward into the hot water storage tank and contaminates the rinsing water. In addition, the top end opening of the overflow pipe installed in the hot water storage tank is simply configured to be higher than the set water level of the washing tank, and the check valve can be omitted, reducing the number of parts. In addition, the manufacturing cost can be kept low.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram illustrating a dishwasher according to an embodiment.
FIG. 2 is a schematic configuration diagram illustrating a relationship between a hot water storage tank and a cleaning tank of the dishwasher according to the embodiment.
FIG. 3 is a schematic configuration diagram of a dishwasher according to a conventional technique.
[Explanation of symbols]
16 Washing tank, 22 Drainage path, 26 Hot water storage tank 28 Second overflow pipe, 28a Upper end opening, 28b Lower end opening A First set water level

Claims (1)

A cleaning tank (16) in which cleaning water is stored, a hot water storage tank (26) in which rinsing water is stored, and an overflow pipe that is disposed in the hot water storage tank (26) and overflows the rinsing water from the upper end opening (28a). (28), and a dishwasher in which the lower end opening (28b) of the overflow pipe (28) is connected to the washing water drainage path (22) of the washing tank (16),
A dishwasher characterized in that an upper end opening (28a) of the overflow pipe (28) is set at a position higher than a set water level (A) of washing water stored in the washing tank (16).

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