JP2000014621A - Draining cooler and dishwasher having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cool a high-temperature liquid stored in equipment, while draining it. SOLUTION: When high-temperature washing water 118 (rinsing water) stored in the water reservoir 113 of a dishwasher 101 is drained through a discharge pipe 133, a water flow sensor 211 detects the water drained and outputs a drain detection signal to a cold water mixing control part 213. The cold water mixing control part 213 opens a first opening/closing valve 209 in response to this output. As a result, cooling water 205 stored in a tank 203 passes through a cooling water pipe 207, and since the cooling water 205 mixed at a mixing part 215 with the washing water 118 flowing through the discharge pipe 133 is lower in temperature than the washing water 118, the mixed water 219 cooled to low temperature flows thorough the discharge pipe 217.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain cooler and a dishwasher provided with the drain cooler, and more particularly to a device for draining a high-temperature liquid stored in the device from a discharge pipe (for example, a tea server, medical equipment, etc.). The present invention relates to a drain cooler used for a device, a dishwasher, and a dishwasher provided with the drain cooler.

[0002]

2. Description of the Related Art As a device for draining high-temperature liquid from a discharge pipe, there is a dishwasher for discharging high-temperature washing water (for example, rinsing water) from a discharge pipe. This dishwasher is usually connected at its drain to a drain provided in the home. From a sanitary point of view, the temperature of the rinsing water is raised to a high temperature (for example, 77 ° C.) for sterilization, and the rinsing step is performed.

[0003]

However, most of the drain pipes provided in homes are made of vinyl chloride, and their heat-resistant temperature is lower than the temperature of rinsing water for sterilization (for example, 77 ° C.). About 60 ° C. Therefore, when the high-temperature rinse water flows into the drain pipe made of vinyl chloride, as a result of overheating, expansion and cracks may occur, and problems such as leakage of drain water may occur.

[0004] As means for solving such problems, there is, for example, a means disclosed in Japanese Patent Application Laid-Open No. 6-62997, and heated water (rinse water) stored in a water storage tank of a washing room in a dishwasher. Water supply (up to the level where the abnormal water level switch does not operate), agitation (0.1 seconds ON-0.9 seconds OFF), drainage (constant time)
The above operation is repeated for one minute, and the temperature is lowered to discharge the high-temperature rinse water little by little.

However, in order to prevent overflow from the water storage tank, water can be supplied only to such an extent that the water level does not reach the level at which the abnormal water level switch operates, and the temperature drop of the heated water due to the mixing of cold water is small. Until now,
Drainage with a sufficient temperature drop cannot be performed from the initial stage. In addition, it takes a long time to drain the water because the water is drained little by little.

[0006] In a tea server or a medical device as a device for draining a high-temperature liquid, as described above, the high-temperature liquid is drained to be distributed in a home made of vinyl chloride. There is a problem that adversely affects the installed drain pipe. Therefore, the first invention provides a “drain cooler used for a device that drains a high-temperature first liquid stored in a device from a discharge pipe”, and discharges the first liquid from the beginning to the end of drainage. It is an object of the present invention to provide a drainage cooler capable of performing drainage in a shorter time than conventional methods while sufficiently lowering the temperature.

A second invention is a "dishwasher for draining high-temperature washing water stored in a water tank of a washing room from a discharge pipe", after disinfecting with high-temperature washing water. ,
An object of the present invention is to provide a dishwasher provided with a drain cooler capable of draining water in a shorter time than conventional methods, while sufficiently lowering the temperature of washing water from the beginning to the end of drainage.

[0008]

Means for Solving the Problems <Invention Regarding First Drain Cooler><1> The first solution of the present invention, which has been made to solve the above-mentioned problem, is "the temperature of the first liquid. A cooling water pipe through which the second liquid having a lower temperature flows and connected to the discharge pipe, a first opening / closing valve provided in the cooling water pipe, drainage detecting means for detecting drainage of equipment, and drainage detection of drainage detecting means A chilled water mixing control means for controlling the first on-off valve to open in response to the signal; and a connection between the discharge pipe and the chilled water pipe, wherein the first liquid to be drained is the second liquid And a mixing unit for mixing the two.

The above solution works as follows. Since the low-temperature second liquid is mixed with the discharged high-temperature first liquid, the first liquid can be cooled. Also, the second to mix
Since it is not necessary to limit the amount of the liquid, the first liquid can be sufficiently cooled from the beginning of drainage. Furthermore, since the first liquid can be cooled while being drained instead of being cooled and then drained as in the related art, the time required for drainage does not become long. Furthermore, since the drainage of the equipment is detected by the drain cooler itself, it can be separated from the equipment.

In the case where a waste water cooler is incorporated in the above-mentioned equipment, the cold water mixing control means may be used also as the waste water detecting means. That is, the drainage detection signal may be replaced by a drainage instruction signal from the cold water mixing control means.

[0011]

For example, when the equipment is a dishwasher,
In addition to being able to perform sufficient sterilization, it can also prevent overheating of drainage pipes installed in the home, preventing expansion and cracks,
No problems such as drainage leaks occur. In addition, since the same level of cooling is possible from the beginning to the end of drainage, there is no problem that the initial temperature drop is insufficient as in the conventional case.

Furthermore, since cooling is performed while draining without requiring cooling time in addition to draining time as in the prior art, the time required for draining can be shortened. Furthermore, the drain cooler can be installed separately from the equipment, and in this case, the above-described effects can be obtained without changing the inside of the existing equipment. [Others] <Item 2> In the first aspect of the present invention, "a tank for storing the second liquid is provided, and the cooling water pipe connects the tank and the discharge pipe."
In this case, the second liquid stored in the tank flows through the cooling water pipe to the discharge pipe, and the same effects as those of the first invention can be obtained.

<Claim 3> The first invention (Claim 2) is characterized in that “a water supply pipe for supplying a second liquid from a supply source to a tank, and a second on-off valve provided in the water storage pipe are provided. The detection means
Upon detecting the end of drainage of the equipment, the chilled water mixing control means closes the first on-off valve and opens the second on-off valve in response to the drainage end detection signal of the drainage detection means, Second
After the liquid is supplied to the tank, the second on-off valve is controlled to be in the closed state. ”In addition to the above-described effects, the second liquid is supplied in order to cope with drainage at the next opportunity. Thus, there is an effect that it is possible to cope with a case where the device drains the high-temperature first liquid a plurality of times.

When a drain cooler is incorporated in the apparatus, the drain end detection signal may be replaced by a drain end instruction signal from the cold water mixing control means. Further, the opening and closing may be controlled by, for example, a ball tap as a cold water mixing control means for controlling the second on-off valve. <4> The first invention (Claims 1 and 2) describes that “the drainage detection means detects the end of drainage of the equipment, and the cold water mixing control means
The first opening / closing valve is closed in response to the drainage end detection signal of the drainage detecting means "can also deal with a case different from the case of the tank. That is, for example, when tap water is directly supplied to the cooling water pipe, the second liquid water is continuously supplied unless the first opening / closing valve is closed, but the first liquid is supplied in response to the drainage completion detection signal. By closing the on-off valve, water is not wasted.

<5> The first aspect of the present invention further comprises a temperature detecting means for detecting that the liquid to be drained is the first liquid having a high temperature. In response to the detection signal and the drainage detection signal of the drainage detection means, the first on-off valve is controlled to be in the open state. ” When the low-temperature liquid is discharged from the discharge pipe, the second liquid is not flown from the cooling water pipe, so that the second liquid for cooling does not needlessly be used.

[0016]

Means for Solving the Problems <Invention relating to a dishwasher equipped with a second drain cooler><Section6> The second means for solving the above-mentioned problems according to the present invention is a "drainage cooler". Equipped with a cooler, a drain cooler,
Cooling water at a temperature lower than the temperature of the washing water flows, and a cooling water pipe connected to the discharge pipe, a first opening / closing valve provided in the cooling water pipe, and a drainage instruction signal are output to open the first opening / closing valve. A cooling water mixing control means for controlling the discharge water and a cooling water pipe, and a mixing part for mixing the cooling water with the drained washing water. is there.

The above solution works as follows. Mixing low-temperature cooling water with high-temperature washing water drained,
Wash water can be cooled. Further, since there is no need to limit the amount of cooling water to be mixed, the washing water can be sufficiently cooled from the beginning of drainage. Further, since the washing water can be cooled while being drained instead of being cooled and then drained as in the related art, the time required for draining does not become long.

[0018]

According to the present invention, the dishwasher can perform sufficient sterilization and also can prevent overheating of the domestic drain pipe, prevent expansion and cracks, and do not cause problems such as drainage leakage. In addition, since the same level of cooling is possible from the beginning to the end of drainage, there is no problem that the initial temperature drop is insufficient as in the conventional case.

Furthermore, since cooling is performed while draining without cooling time in addition to draining time as in the prior art, the time required for draining can be shortened. [Others] <Section 7> The second invention is characterized in that "the drain cooler includes a tank for storing the second liquid, and the cooling water pipe connects the tank and the discharge pipe". Then, the cooling water stored in the tank flows through the cooling water pipe to the discharge pipe, and the same effect as that of the second aspect is obtained.

<Section 8> The second invention (Section 7) states that the “drain cooler includes a water storage pipe for supplying cooling water from a supply source to a tank, and a second on-off valve provided in the water storage pipe. Then, the chilled water mixing control means outputs a drainage end instruction signal, closes the first on-off valve, opens the second on-off valve, and replenishes the reduced amount of the cooling water to the water storage tank. The second opening / closing valve is controlled to be in a closed state. ”In addition to the above-described effects, tableware is replenished in order to supply cooling water to cope with the next drainage of the dishwasher. There is an effect that it is possible to cope with a case where the washing machine drains high-temperature washing water a plurality of times.

The opening and closing may be controlled by, for example, a ball tap as chilled water mixing control means for controlling the second on-off valve. <9> The second invention (Sections 6 and 7) is characterized in that the chilled water mixing control means outputs a drainage end instruction signal to close the first on-off valve. Then, it is possible to cope with a case different from the case of the tank. That is, for example, when flowing tap water directly into the cooling water pipe, the cooling water continues to flow unless the first on-off valve is closed, but the first on-off valve is closed in response to the drainage end instruction signal. By setting the state, the cooling water is not wasted.

<10> In the second aspect of the present invention, the washing water in the washing tank is stored a plurality of times, and the stored washing water is drained from a discharge pipe. The high-temperature washing water is stored, and only when the cold-water mixing control means outputs a high-temperature draining instruction signal for instructing drainage of high-temperature washing water different from a drainage instruction signal for instructing drainage of other washing water, The first opening / closing valve is controlled so as to be in an open state. ”The above-mentioned method does not drain the high-temperature washing water (rinsing water) as described above, but uses a temperature of a degree necessary for washing. When draining the pre-wash water or the main wash water, the cooling water does not flow from the cooling water pipe, so that the cooling water is not wasted.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described together with the illustrated example. FIG. 1 is a schematic diagram showing a state in which a waste water cooler according to a first embodiment of the present invention is externally installed in a dishwasher. With reference to FIG. 1, the dishwasher will be described first, and then the drain cooler will be described. The dishwasher (101) has a washing room (103) inside.
The front of the washing room (103) can be opened and closed by a door (105). The door (105) is provided with a detergent dispenser (107) on the cleaning room (103) side. A dish basket (109) is provided in the washing room (103), and the dish (11) is placed in the lower basket (109a).
1a) is stored, and the tableware (111b) is stored in the upper basket (109b).

The lower part of the washing room (103) is a water storage tank (113), and the water storage tank (113) stores cleaning water (118).
The washing water (118) is supplied and drained according to the steps of pre-washing, main washing, rinsing and the like, and is used for washing by circulating by a washing pump (123) described later. Then, the water is stored in the water storage tank (113) by opening or closing a water supply valve (115) and supplying water or hot water through a water supply pipe (117).

In the water tank (113), a heater (119) is provided.
The temperature of the washing water (118) is raised, and the temperature of the internal air in the drying step described later is raised. Also,
The temperature of the wash water (118) is set to a predetermined temperature (77 ° C if the temperature of the rinse water for sterilization) by detecting the temperature with a thermistor (121) provided at the lower part of the water storage tank (113). Is done.

Next, the cleaning step will be described. Water storage tank
The washing water (118) stored in (113) is supplied to the washing pump (123).
Is actuated to feed the rotating nozzle (127) and the fixed nozzle (129). The washing water (118) sent to the rotating nozzle (127) rotates while the tableware contained in the lower basket (109a).
It is injected to (111a). The washing water (118) sent to the fixed nozzle (129) is jetted to the tableware (111b) in the upper basket (109b).
By these sprays, the dishes (111a) and the dishes (111b) are cleaned, and the sprayed washing water (118) falls down while containing the stains, and is again stored in the water storage tank (113). This series of operations is circulated to wash the dishes.

It should be noted that the dirt attached to the tableware (111a) and the tableware (111b) is removed by the garbage filter (125) with the circulation during washing. Here, the washing water (118) includes those used for a pre-washing step, a main washing step, and a rinsing step. For pre-washing, water or hot water is used. For main washing, hot water containing detergent or rinsing supplied from the detergent dispenser (107) is used, and hot water is used for rinsing water. In particular, the rinsing water is not only effective in rinsing, but also has a role of sterilization. Each washing water is drained when each step is completed, and the drainage will be described below.

Drainage is performed through a discharge pipe (133) provided in the dishwasher (101) by operating a drain pump (131). The discharge pipe (133) is a drainage path that rises once to prevent backflow, and the backflow is prevented by a drain check valve (139). Then, the washing water (118) flowing through the drain pipe (133) is drained toward a drain pipe (217) provided in the home.

Then, the dishwasher (101) performs a rinsing step to drain the water, and then executes a drying step to dry the dishes (111a) and the dishes (111b). Drying is performed by operating the fan (143) to take in outside air from the intake port (141), and the intake air is drawn into the intake opening (145).
From the washing room (103). The sent air is a heater
It is heated at (119) and flows toward the exhaust opening (147) while removing moisture from the dishes (111a) and (111b). The wet air flows from the exhaust opening (147) to the exhaust port (149), and the wet air is sent out. By repeating this operation, the dishes are dried.

[Drain Cooler] The drain cooler (201) can be installed externally to the existing dishwasher (101), and includes a tank (203), a cooling water pipe (207), and a first opening / closing valve. (209)
A water flow sensor (211) as a drainage detecting means, a cold water mixing control section (213), a mixing section (215), a water storage pipe (221),
It comprises a second on-off valve (223) and a water level sensor (225).

The tank (203) contains washing water (1) heated to a high temperature (77 ° C.) for sterilization in the dishwasher (101).
18) Stores cooling water (205) (tap water, usually 5 ° C to 30 ° C) at a temperature lower than the temperature of (rinsing water in the rinsing step). The cooling water pipe (207) connects the tank (203) and the discharge pipe (133). The first on-off valve (209) is provided in the cooling water pipe (207). Water flow sensor (211)
Is detection means for detecting the flow of the washing water (108) in the discharge pipe (133) to thereby detect the drainage of the dishwasher (101). The chilled water mixing control unit (213) responds to the drainage detection signal detected by the water flow sensor (211) to respond to the first on-off valve (2).
09) Control to open the valve. The mixing section (215) is a connector, having three connecting portions, a first connecting portion connected to the discharge pipe (133), and a second connecting portion connected to the cooling water pipe (2).
07), and the third connection part is connected to the household drain pipe (217). The drain pipe (217) is made of vinyl chloride,
The lower heat resistance temperature is as described above.

The dish washer (101) of the present embodiment.
Is a directly connected drainage pipe (217) and discharge pipe (133), and is of a built-in type. The operation of the drain cooler (201) will be briefly described. When the high-temperature washing water (118) (rinse water) is drained from the dishwasher (101) by the operation of the drain pump (131), the washing water (118) flows through the drain pipe (133). A water flow sensor (211) detects a water flow in the discharge pipe (133) to detect drainage of the dishwasher (101). The water flow sensor (211) outputs the drainage detection signal to the cold water mixing control unit (213).
Output to The chilled water mixing controller (213) changes the first on-off valve (209) from the closed state to the open state in response to the drainage detection signal. As a result, the cooling water (2
05) passes through the cooling water pipe (207) and mixes with the high-temperature washing water (118) in the mixing section (215). As a result, hot washing water (118)
Is cooled to a mixed water (219) having a temperature lower than the heat resistant temperature (60 ° C.) of the drain pipe (217) and flows into the drain pipe (217).

Therefore, the drain pipe (217) is not overheated and does not expand or crack, so that there is no problem such as drainage leakage. There is no problem if the first opening / closing valve (209) is open after the drainage is completed. However, in order to prevent useless use of the cooling water (205), the drainage of the dishwasher (101) is completed. The water flow sensor (211) outputs a drainage end detection signal to the cold water mixing controller (213), and the first on-off valve (209) is closed.

Next, in case that the high-temperature washing water (118) is drained next time, the used cooling water (20) is stored in the tank (203).
5) The configuration and operation of replenishing will be described. Water storage pipe
(221) is for supplying the cooling water from the supply source to the tank (203). The second on-off valve (223) is provided on the water storage pipe (221). When the drainage end detection signal is output to the chilled water mixing controller (213), the first on-off valve (209) is closed, and the chilled water mixing controller (213) is turned on by the second on-off valve (2).
23) is opened, the cooling water (205) is stored in the tank (203) through the water storage pipe (221), and the water level rises. When the water level sensor (225) detects a predetermined value, the signal is sent to the chilled water mixing controller (213), and the chilled water mixing controller (213) sends the signal to the second controller.
Close the on-off valve (223). As a result, a reduced amount of the cooling water (205) used for mixing with the high-temperature washing water (118) is supplied to the tank (213).

The water level sensor (225) may be any sensor such as an electrode sensor or a pressure sensor as long as it can detect a predetermined water level. If the dishwasher is a tabletop type, high-temperature rinsing water will be drained from the drain pipe (133) to the sink.In that case, too, the overheating of the drain pipe installed in the home should be prevented. Can be performed, and the danger of the user touching the hot water can be completely prevented.

Furthermore, since the same level of cooling is possible from the beginning to the end of the drainage, there is no problem that the initial temperature drop is insufficient as in the prior art. Furthermore, since cooling is performed while draining without requiring cooling time in addition to draining time as in the related art, the time required for draining can be reduced. further,
The drain cooler can be installed separately from the equipment, and the above-mentioned effect can be obtained without changing the inside of the existing dishwashing equipment.

Furthermore, since it is a waste water cooler separate from the equipment, there is versatility that it can be applied not only to a dishwasher but also to a tea server, medical equipment and the like. Note that the water flow sensor (2
The water level sensor (22) is used without using the drainage detection signal and drainage end detection signal from the chilled water mixing controller (213) based on the output of (11).
The second on-off valve (223) may be controlled to open and close based on the water level detection value of 5). The opening and closing of the second on-off valve (223) may be performed by a ball tap.

In addition to the water flow sensor (211), in order to prevent the drain cooler from operating at the time of pre-washing other than high-temperature rinsing water or draining of washing water in the main washing step,
The drain pipe (133) is provided with a temperature sensor as a temperature detecting means for detecting that the drained washing water is high-temperature washing water (rinsing water), and a drainage detection signal of the water flow sensor (211) and a temperature sensor are provided. The chilled water mixing control section (213) may open the first on-off valve (209) only when the detection signal is inputted. By doing so, useless use of the cooling water can be prevented.

Further, in the case where water supply and drainage are repeated a plurality of times in the rinsing step, a plurality of times of rinsing water are set at a high temperature, and a plurality of times of water supply and drainage in the washing step (pre-washing and main washing) and the rinsing step are performed. Among them, high-temperature washing water may be used plural times. In that case, for example, the temperature may be the same, or the temperature may be gradually increased,
The temperature may be gradually lowered.

FIG. 2 is a view showing a modified example of the drainage cooler according to the embodiment of FIG. 1, and portions different from FIG. 1 will be described. In the embodiment of FIG. 2, a water supply direct pressure type is used without using a tank (203) or the like as in the case of FIG. That is, the cooling water pipe (207) is provided with the first on-off valve (209),
The water flow sensor (211) detects drainage of the dishwasher (101) and the end of drainage, and the chilled water mixing controller (213) receives the drainage detection signal and opens the first on-off valve (209). The first on-off valve (209) is controlled to be closed in response to the input of the drainage end detection signal.

The check valve (227) is connected to the first opening / closing valve (209) of the cooling water pipe (207) to separate the water supply side and the sewage side.
, But a hopper may be used instead. The other contents have been described in the embodiment of FIG. FIG. 3 is a schematic block diagram showing a dishwasher having a built-in drain cooler according to a second embodiment of the present invention.

Referring to FIG. 3, a portion of the dishwasher (301) different from that of FIG. 1 will be described in detail. Dishwasher (3
01) originally includes a control unit (303) that plays a role of a cold water mixing control unit that controls a washing step (pre-washing, main washing), a rinsing step, and a drying step. The control unit (303) outputs a drainage instruction signal to the drainage pump (131), and outputs a drainage end instruction signal. Therefore, the control unit (303) recognizes the drainage of equipment and the end of drainage.
Outputs a drainage instruction signal to the first on-off valve (209) and outputs the first on-off valve
(209) is opened, and the drainage end instruction signal is sent to the first on-off valve.
(209) to close the valve.

Another difference is that the cooling water pipe (207) and the discharge pipe (1)
33) can be directly connected without using a connector. However, also in this case, the connection portion corresponds to the mixing portion. The opening and closing of the second on-off valve (223) is opened by the drainage end instruction signal output from the control unit (303), and the water level sensor (2) is opened.
The valve is closed by a signal from the control unit (303) which has received the sensor output of (25). The second on-off valve (223) is controlled by the control signal of the control unit (303) having received the water level detection value of the water level sensor (225) without using the drainage instruction signal and the drainage end instruction signal from the control unit (303). May be performed.

As described above, the effect of the dishwasher (301) having the built-in drain cooler (305) is almost the same as that of the embodiment shown in FIG. As in the case of the embodiment of FIG. 1, in order to prevent the drain cooler from operating during pre-washing other than high-temperature rinsing water or draining of washing water in the main washing step, the control unit (303 ), The first on-off valve (209) may be opened only when the high-temperature drainage instruction signal is output from among the drainage instruction signals output by (1). By doing so, useless use of the cooling water can be prevented.

Further, as in the case of the embodiment of FIG. 1, when the rinsing step repeats water supply and drainage a plurality of times, the rinsing water is set to a high temperature a plurality of times, and the cleaning step (pre-washing, main cleaning) is performed. Of the multiple times of water supply and drainage in the washing / rinsing step, high-temperature washing water may be used multiple times. In this case, for example, the temperature may be the same, the temperature may be gradually increased, or the temperature may be gradually decreased.

Further, even if the control unit is incorporated,
Without using the drainage instruction signal and the drainage end instruction signal from (303), the water flow detection signal (drainage detection signal,
(A drainage end detection signal). Further, the opening and closing of the second on-off valve (223) may be performed using a method such as a ball tap different from the control unit (303).

FIG. 4 is a view showing a modified example of the dishwasher having a built-in drain cooler according to the embodiment of FIG. 3, and different portions from FIG. 3 will be described. In the embodiment of FIG. 4, a water supply direct pressure type is used without using a tank (203) or the like as in the case of FIG. That is, a first opening / closing valve (209) is provided in the cooling water pipe (207), the control section (303) outputs a drainage instruction signal to open the first opening / closing valve (209), and outputs a drainage end instruction signal. Thus, the first on-off valve (209) is controlled to be closed.

A hopper (229) provided with an air opening (229a) is provided downstream of the first opening / closing valve (209) of the cooling water pipe (207) to separate the water supply side from the sewage side. Although provided, a check valve may be used instead. In addition, air opening
(229a) to prevent odor leakage.
a) or a check valve may be provided. The other contents have been described in the above-described embodiment, and a description thereof will be omitted.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a state in which a waste water cooler according to a first embodiment of the present invention is externally attached to a dishwasher separately.

FIG. 2 is a diagram showing a modified example of the drain cooler according to the embodiment of FIG.

FIG. 3 is a schematic block diagram showing a dishwasher having a built-in drain cooler according to a second embodiment of the present invention.

FIG. 4 is a view showing a modified example of the dishwasher incorporating the drain cooler according to the embodiment of FIG. 3;

[Explanation of symbols]

 (101), (301) ・ ・ ・ Dishwasher (118) ・ ・ ・ Washing water (133) ・ ・ ・ Drain pipe (201), (305) ・ ・ ・ Drain cooler (203) ・ ・ ・ Tank ( 205) Cooling water (207) Cooling water pipe (209) First open / close valve (211) Water flow sensor (213) Cold water mixing controller (215) Mixing Part (221) ··· Water storage pipe (223) ··· Second on-off valve (225) ··· Water level sensor (303) ··· Control unit (Note that the same reference numerals in each figure denote the same or corresponding parts.) .)

Claims (10)

[Claims] 1. A drain cooler used for a device for draining a high-temperature first liquid stored in a device from a discharge pipe, wherein the second device has a lower temperature than a temperature of the first liquid. 2, a cooling water pipe connected to the discharge pipe, a first opening / closing valve provided on the cooling water pipe, a drainage detecting unit for detecting drainage of the device, and a drainage detection signal of the drainage detection unit. In response, the first
Cold water mixing control means for controlling the on-off valve to be in an open state; and a connecting portion between the discharge pipe and the cooling water pipe, wherein the second liquid is mixed with the drained first liquid. And a drain cooler comprising: 2. The drain cooler according to claim 1, further comprising a tank for storing the second liquid, wherein the cooling water pipe connects the tank and the discharge pipe. 3. A water supply pipe for supplying the second liquid to the tank from a supply source, and a second on-off valve provided on the water storage pipe, wherein the drainage detection means completes drainage of the device. The cold water mixing control means, in response to the drainage end detection signal of the drainage detection means, to close the first on-off valve,
3. The drain cooler according to claim 2, wherein the second on-off valve is opened, and after the reduced amount of the second liquid is supplied to the tank, the second on-off valve is closed. 3. . 4. The drainage detecting means detects the end of drainage of the equipment, and the chilled water mixing control means closes the first on-off valve in response to a drainage end detection signal of the drainage detecting means. The drain cooler according to claim 1 or 2, wherein: 5. The method according to claim 5, wherein the drained liquid is the first liquid of the high temperature.
Comprising a temperature detection means for detecting that the liquid is, the cold water mixing control means, in response to a high temperature detection signal of the temperature detection means and a drainage detection signal of the drainage detection means,
The drain cooler according to any one of claims 1 to 4, wherein the first on-off valve is controlled to be in an open state. 6. A dishwasher for draining high-temperature washing water stored in a water storage tank of a washing room from a discharge pipe, comprising a drain cooler, wherein the drain cooler has a temperature lower than the temperature of the wash water. A cooling water pipe through which low-temperature cooling water flows, and a cooling water pipe connected to the discharge pipe; a first on-off valve provided on the cooling water pipe; and a drainage instruction signal output to open the first on-off valve. And a mixing unit for mixing the cooling water with the drained washing water, the mixing unit being a connection part between the discharge pipe and the cooling water pipe. washing machine. 7. The tableware according to claim 6, wherein the drain cooler includes a tank for storing the second liquid, and the cooling water pipe connects the tank and the discharge pipe. washing machine. 8. The drain water cooler includes: a water storage pipe for supplying cooling water from a supply source to the tank; and a second on-off valve provided in the water storage pipe, wherein the cold water mixing control means After the end instruction signal is output, the first on-off valve is closed, the second on-off valve is opened, and a reduced amount of the cooling water is supplied to the water storage tank. The dishwasher according to claim 7, wherein control is performed to close the valve. 9. The dishwasher according to claim 6, wherein the cold water mixing control unit outputs a drainage end instruction signal to close the first on-off valve. 10. A washing tank in the washing chamber, wherein washing water is stored a plurality of times, each of the stored washing water is drained from the discharge pipe, and high-temperature washing water is at least once out of the plurality of times. Only when the cold water mixing control means outputs a high-temperature drainage instruction signal for instructing drainage of the high-temperature wash water different from a drainage instruction signal for instructing drainage of another wash water, the first on-off valve The dishwasher according to any one of claims 6 to 9, wherein the dishwasher is controlled so as to open the valve.