JP2002253464A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent rinsing water and heat energy used for heating. from being used in a wasteful manner SOLUTION: A washing tank 20 for storing washing water is arranged in the bottom part of a washing chamber 14. The washing tank 20 is provided with a first overflow pipe 24 for discharging washing water which exceeds a first setting water level to an external part. A warm water storing tank 26 for storing rinsing water is disposed outside the washing chamber 14. The warm water tank 26 is provided with a second overflow pipe 42 for permitting rinsing water which exceeds an overflow water level C to overflow. The lower end opening of the second overflow pipe 42 is connected to the washing tank 20 by communication and rinsing water which overflows from the warm water storing tank 26 to the pipe 42 is collected into the washing tank 20. The connecting position of the washing tank 20 to the second overflow pipe 42 is set to be lower than the first setting water level in the washing tank 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher, and more particularly, to a dishwasher configured to collect rinse water overflowing from a hot water storage tank via an overflow pipe into a wash tank and to use the rinse water as wash water. It is about the machine.

[0002]

2. Description of the Related Art A large number of dishes, bowls,
2. Description of the Related Art Dishwashers for automatically washing dishes such as cups are mainly installed in kitchens such as coffee shops and restaurants, and are suitably used for business purposes. This dishwasher is provided with a hot water storage tank for storing rinsing water (hot water) used for rinsing tableware, and the tank controls opening and closing of a water valve provided on a hot water supply pipe by a detection signal of a float switch. A fixed-quantity water supply mechanism for storing rinse water at a set water level is provided. Also, considering that the float switch, water valve, etc. constituting the fixed quantity water supply mechanism has a failure, if the water supply is not stopped even if the set water level is exceeded, rinse water for the excess of the overflow water level Measures are taken to discharge to the outside from the overflow pipe.

Here, if the user does not notice when the above-mentioned overflow occurs, the rinse water is continuously discharged, and the water and the heat energy used for heating the water are wasted.
Therefore, when the water level in the hot water storage tank reaches the upper end opening (overflow port) of the overflow pipe, an overflow switch for detecting this is provided, and when the switch is activated, an alarm is issued to notify the user. ing.

[0004]

In the dishwasher provided with the above-mentioned overflow switch, the overflow switch is deliberately supplied with rinsing water higher than the overflow water level at the time of initial water supply to the hot water storage tank. Was provided with means for self-diagnosis as to whether or not the system normally operates. Therefore, it is pointed out that rinse water intentionally discharged from the hot water storage tank via the overflow pipe at the time of initial water supply is wasted, and water and thermal energy used for heating the water are wasted.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks inherent in the prior art, and has been proposed in order to preferably solve the problem. Rinsing water and heat energy used for heating have been proposed. It is an object of the present invention to provide a dishwasher capable of preventing waste.

[0006]

DISCLOSURE OF THE INVENTION In order to solve the above problems and achieve the intended object, a dishwasher according to the present invention comprises a washing tank for storing washing water and a hot water storage for rinsing water. In a dishwasher comprising a tank, an overflow pipe for rinsing water exceeding a predetermined water level to overflow from an upper end opening is provided in the hot water storage tank, and a lower end opening of the pipe and the washing tank are connected to the washing tank. The connection is made at a position lower than the set water level of the washing water stored in the inside.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of a dishwasher according to the present invention will be described with reference to the accompanying drawings.
This will be described in detail below.

As shown in FIG. 1, a dishwasher 10 according to an embodiment is shown.
The washing chamber 14 is defined on the upper inside of the main body 12, and inside the washing chamber 14, the washing nozzles 16, 16 which are horizontally rotated by the washing reaction force of the washing water and the washing reaction force of the rinsing water are formed. The horizontally rotating rinse nozzles 18, 18
They are respectively disposed to face each other up and down. An opening that is opened and closed by a door is provided on a front surface of the main body 12 that corresponds to the washing room 14, and a tableware rack (not shown) in which tableware is stored through the opening is vertically moved. Cleaning nozzle 16,
16 and the rinsing nozzles 18, 18.

At the bottom of the cleaning chamber 14, a cleaning tank 20 for storing cleaning water mixed with a detergent is provided. The cleaning water stored in the tank 20 is supplied to the cleaning nozzle 22 via a cleaning pump 22. The nozzles 16 and 16 are pressure-fed and are configured to be sprayed toward tableware from injection holes (not shown) of the nozzles 16 and 16. The washing water used for washing is
It is collected in the washing tank 20 and recirculated. Further, the washing tank 20 is provided with a first overflow pipe 24 for overflowing washing water exceeding the first set water level A and discharging the washing water to the outside.

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 20. The rinse water is stored at the second set water level B. This quantitative water supply mechanism 28
A hot water supply pipe 30 which is derived from a hot water generating device (not shown) and connected to an upper portion of the hot water storage tank 26, a water valve 32 which is provided in the hot water supply pipe 30 and whose opening and closing can be controlled, and a rinse which is supplied into the hot water storage tank 26. And a float switch 34 for detecting that the water has reached the second set water level B. By controlling the opening and closing of the water valve 32 based on the on / off operation of the float switch 34,
The rinse water in the hot water storage tank 26 is maintained at the second set water level B.

The rinsing water stored in the hot water storage tank 26 is supplied to the rinsing nozzle 1 via a rinsing pump 36.
8, 18 and the nozzles 18, 18
After being sprayed toward tableware from a spray hole (not shown), it is collected in the washing tank 20 in the same manner as the washing water, and is used as washing water. Heaters 38 and 40 and a thermostat (not shown) are provided inside the hot water storage tank 26 and the washing tank 20, and the rinsing water and the washing water can be kept at about 80 ° C. and about 60 ° C., respectively. It is configured as follows.

As shown in FIG. 2, the hot water storage tank 26 is provided with a second overflow pipe 42 for overflowing the internal rinse water. The upper end opening 42a of the second overflow pipe 42 is set above the second set water level B, and the water level in the hot water storage tank 26 is higher than the second set water level B (the predetermined water level B). ) When C is exceeded, the rinsing water of the excess is overflowed. Hot water storage tank 2
The lower end opening 42b of the second overflow pipe 42 extending downward from the bottom of the pipe 6 is connected to the washing tank 20, and rinse water overflowing from the hot water storage tank 26 into the pipe 42 is supplied to the washing tank 20. It is configured so that it can be collected. The connection position between the cleaning tank 20 and the second overflow pipe 42 is a position lower than the first set water level A defined by the first overflow pipe 24 in the cleaning tank 20, as shown in the figure. The washing water is set up to the same level as the first set water level A in the pipe 24.

The hot water storage tank 26 is provided with an overflow switch 44 for detecting when the water level in the tank reaches the overflow water level C. When the switch 44 is activated, an alarm is issued to notify the user. It is configured to inform.

[0014]

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 washing tank 20 is performed first. That is, the hot water storage tank 26
After once storing the rinse water to the second set water level B,
By driving the rinsing pump 36 to inject the rinsing water into the cleaning chamber 14 by the rinsing nozzles 18 and 18 and collecting the rinsing water in the cleaning tank 20 a plurality of times, the first set water level is stored in the cleaning tank 20. The rinsing water which becomes the washing water is stored until A.

In order to diagnose whether or not the overflow switch 44 provided in the hot water storage tank 26 normally operates at the time of the initial water supply, the hot water storage tank 26 is intentionally connected to the second overflow pipe 42 by the second overflow pipe 42. Rinse water is supplied over a specified overflow water level C. At this time, the rinse water discharged from the upper end opening 42a of the second overflow pipe 42 is collected in the washing tank 20 without being discarded outside. That is, it is possible to prevent rinsing water, which is intentionally supplied for diagnosis of the overflow switch 44, from being wastefully discarded, and to prevent loss of heat energy used for heating.

As described above, when the operation of the dishwasher 10 is started with the rinsing water and the washing water stored up to the set water levels A and B in the hot water storage tank 26 and the washing tank 20, respectively, the washing process is started. You. That is, the cleaning water in the cleaning tank 20 is supplied to the cleaning nozzle 1 by the cleaning pump 22.
It is pumped to 6, 16 and injected into the washing chamber, whereby the dishes are washed. After a predetermined pause time, the rinsing process is started, and the rinsing water in the hot water storage tank 26 is supplied to the rinsing pump 3.
By means of 6, rinsing nozzles 18, 18 are pumped and sprayed into the washing chamber, whereby the tableware is rinsed.
In the meantime, the rinsing water is supplied to the hot water storage tank 26 up to the second set water level B by the quantitative water supply mechanism 28 and stored therein, and waits for the next washing cycle.

Here, if the water supply to the hot water storage tank 26 is continued even when the abnormality such as a failure occurs in the fixed quantity water supply mechanism 28 and the water level exceeds the second set water level B, the rinse water in the tank becomes the second water level. Is discharged from the upper end opening 42a of the overflow pipe 42, and the rinse water is collected in the washing tank 20.
If the inside of the washing tank 20 is at the first set water level A, the water is discharged to the outside via the first overflow pipe 24.

As described above, the connection position between the cleaning tank 20 and the second overflow pipe 42 is
The cleaning water stored at 0 is set at a position lower than the first set water level A. Accordingly, as shown in FIG. 2, the washing water is accumulated at the lower end of the second overflow pipe 42 up to the same level as the first set water level A, and the odor in the washing chamber is reduced by the second overflow pipe. It is prevented from entering the hot water storage tank 26 side via 42. Therefore, the odor does not transfer to the rinsing water.

In the embodiment, the rinsing water previously heated is supplied to the hot water storage tank. However, it is also possible to supply normal-temperature water to the hot water storage tank and then to make the hot water with a heater in the tank. Also, even if the overflow switch is not diagnosed, if an abnormality occurs in water supply to the hot water storage tank, the rinse water overflowing from the tank to the overflow pipe should be collected in the washing tank and used as washing water. Can be.

[0020]

As described above, according to the dishwasher according to the present invention, the rinsing water overflowing from the hot water storage tank is collected in the washing tank, so that the rinsing water is prevented from being wasted and waste heat energy is lost. Can be prevented. In addition, by setting the connection position between the overflow pipe of the hot water storage tank and the cleaning tank at a position lower than the set water level of the cleaning water stored in the cleaning tank, the odor in the cleaning chamber is removed from the rinsing water via the pipe. Transfer can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a dishwasher according to an embodiment.

FIG. 2 is a schematic configuration diagram showing a relationship between a hot water storage tank and a washing tank of the dishwasher according to the embodiment.

[Explanation of symbols]

20 cleaning tank, 24 first overflow pipe,
26 hot water storage tank 42 second overflow pipe, 42a upper end opening,
42b Lower end opening A First set water level, C Overflow water level (predetermined water level)

Claims (2)

[Claims] A washing tank for storing washing water;
A dishwasher having a hot water storage tank (26) in which rinsing water is stored, wherein the hot water storage tank (26) overflows rinsing water exceeding a predetermined water level (C) from an upper end opening (42a).
(42), and a lower end opening (42b) of the pipe (42).
A dishwasher, wherein the washing tank (20) and the washing tank (20) are connected at a position lower than a set water level (A) of washing water stored in the washing tank (20). 2. The dishwasher according to claim 1, wherein the washing tank is provided with an overflow pipe for overflowing washing water exceeding a set water level.