JP2008125962A - Dish washing/drying method and dish washing/drying system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dish washing and drying method and a dish washing and drying system sequentially controlling washing operation, rinsing operation and drying operation of dishes or others and using heat of a cold heat cycle heat pump. <P>SOLUTION: The cold heat cycle heat pump of the present invention is constituted of a first closed circuit capable of heating by a compressor, cooling by an expanding valve, and exchanging heat in the air. In the first closed circuit, a refrigerant is heated by being compressed by the compressor. The heated refrigerant heats the inside of the dish washing chamber and washing water by being moved within a heater. The refrigerant moving within the heater is cooled by being expanded by the expanding valve arranged in the first closed circuit. In the dish washing and drying method using the heat of the cold heat cycle heat pump energy can be saved by skillfully using the heat in the air. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dishwashing and drying method and a dishwashing and drying system using sequence control of washing operation, rinsing operation, or drying operation of tableware and the like, and using the heat of a cold cycle heat pump. In particular, the present invention uses a combination of an efficient refrigeration cycle heat pump that pumps heat in the atmosphere, compresses and heats it, and a heat storage device that can store chilled air in a chilled water tank via antifreeze liquid, thereby improving thermal efficiency. The present invention relates to a dishwashing / drying method and a dishwashing / drying system using the heat of an improved cold heat cycle heat pump.

  A conventional dishwashing / drying apparatus automatically performs washing operation, rinsing operation, and drying operation according to a desired sequence in water and air at a set temperature for the tableware stored in the dishwasher. As a result, the tableware and the like are washed, rinsed and dried. The tableware washing and drying apparatus is required not only to exhibit a stable washing ability, but also to be highly efficient or improve the environment.

For example, the tableware washing and drying apparatus in Japanese Patent No. 3768490 detects whether or not a power failure state has been restored by a power failure detection means after a power failure. Further, the power failure detection means detects whether or not the temperature of water and air in the dishwasher after recovery from the power failure is substantially a set temperature by the temperature detection means. When the temperature of the water and air in the dishwasher is in the set state, the operation control unit reads the operation state immediately before the power failure state from the operation state storage unit, and controls to continue the operation state as it is. The dishwasher / dryer does not perform an inefficient operation when the operation control is restarted from the beginning even though the temperature in the dishwasher is set after a power failure. Efficiency.
Japanese Patent No. 3768490

  The conventional dishwashing / drying apparatus includes a heater as a heating device in order to keep the temperature in the dishwasher at a predetermined temperature when performing the washing operation, the rinsing operation, and the drying operation, and the dishwasher In order to lower the internal temperature to a predetermined temperature, it was necessary to provide a blower fan, a cooling fan, a condenser, etc. as a cooling device.

  The heat generated in the conventional dishwashing / drying apparatus uses electric power. Further, the cooling in the dishwashing / drying apparatus releases the internal heat to the outside of the dishwashing / drying apparatus, and at the same time introduces the outside air having a lower temperature than the inside of the dishwashing / drying apparatus. The dishwashing / drying apparatus releases heat generated by electric power as it is to the outside of the dishwasher, which is an inefficient use of heat from the viewpoint of thermal efficiency.

  In addition, the conventional dishwasher / dryer needs to increase the temperature in the dishwasher in order to promote drying, and not only requires energy to raise the temperature in the dishwasher, Some plastic tableware could not be dried because of the high temperature.

  In order to solve the problems as described above, the present applicant paid attention to the relationship between a dishwashing / drying apparatus in which thermal efficiency is a problem and a cold cycle heat pump capable of efficiently transferring heat. The present invention provides a dishwashing drying method and a dishwashing drying system that uses the heat of a cold cycle heat pump that not only uses a cold cycle heat pump as an efficient heating means but also uses energy after heating as cold air. For the purpose. In addition, the present invention utilizes the heat of a cold cycle heat pump that can improve the drying efficiency by exchanging heat between the low-temperature refrigerant and the high-temperature and high-humidity dishwasher air when drying tableware and the like, and condensing moisture. It is an object of the present invention to provide a dishwashing drying method and a dishwashing drying system.

(First invention)
The tableware washing and drying method of the first invention uses a sequence control to control the washing operation, the rinsing operation, and the drying operation, and uses the heat of the cold cycle heat pump. The compressor compresses the refrigerant with a high temperature. The refrigerant thus moved is moved in the heater to heat the dishwasher and the washing water, the refrigerant moved in the heater is expanded and cooled, and the cooled refrigerant is cooled to the atmosphere by the refrigerant heating heat exchanger. The heat of the inside is pumped up, and the heat of the cold cycle heat pump which performs the heating and cooling in the first closed circuit is used.

(Second invention)
The dishwashing and drying method of the second invention is a dishwashing and cooling method in which the antifreeze liquid in the cold water tank in the first invention is circulated by cooling with the cooled refrigerant obtained in the first closed circuit constituting the cold cycle heat pump. It consists of the 2nd closed circuit which dries the moisture in a store | warehouse | chamber, It is characterized by the above-mentioned.

(Third invention)
In the dishwashing and drying method of the third invention, when the dishwashing and drying apparatus in the first or second invention is dried, the antifreeze and / or cooling water circulating in the second closed circuit is vaporized by the expansion valve and cooled. It is cooled by the refrigerated refrigerant, and moisture in the dishwasher is condensed.

(Fourth invention)
The tableware washing and drying system of the fourth invention controls the washing operation, the rinsing operation, and the drying operation by sequence control and uses the heat of the cold cycle heat pump, and supplies the heat generated by the cold cycle heat pump. Heating means serving as a heat source for the dishwasher / dryer via a heat pipe, a compressor for pumping and heating the heat in the atmosphere, an expansion valve for expanding and cooling, provided in the heat supply pipe, and the heating means, The compressor and the expansion valve are connected by a heat supply pipe, and the heat of the cold cycle heat pump configured at least from the first closed circuit constituting the cold cycle heat pump in which the refrigerant circulates is used.

(Fifth invention)
The dishwashing / drying system of the fifth invention circulates the antifreeze and / or cooling water cooled through the cold water collecting heat exchanger by the refrigerant circulating in the first closed circuit constituting the cold cycle heat pump of the fourth invention. There is provided a heat storage device constituting a second closed circuit in which a drying heat exchanger for condensing and drying moisture in the dishwasher and a cold water tank for storing the antifreeze and / or cooling water are connected by a pipe. It is characterized by.

(Sixth invention)
In the dishwashing and drying system of the sixth invention, the second closed circuit in the fourth or fifth invention circulates the antifreeze liquid and / or the cooling water by the heat storage device circulation pump and stores the antifreeze liquid and / or the cooling water. A water cooling tank is provided.

(Seventh invention)
The dishwashing / drying system according to a seventh aspect of the present invention is the dishwashing / drying system according to any of the fourth to sixth aspects of the present invention, when the drying operation is started, the heat storage device circulation pump is operated When heat is exchanged with high-temperature and high-humidity air in the cabinet and the temperature in the dishwasher is high, the cold cycle heat pump is not operated, and the cold cycle heat pump is operated due to a temperature drop.

  According to the present invention, when the dish washing / drying apparatus performs the washing operation, the rinsing operation, or the drying operation, when the temperature rise in the dish washing cabinet is necessary, the cold cycle heat pump is driven to move from the atmosphere. Energy can be saved by using the generated heat.

  According to the present invention, the antifreeze liquid and / or the cooling water in the cold water tank can be cooled using the low-temperature refrigerant discharged during the heating operation of the cold cycle heat pump, so that the cooled antifreeze liquid and / or Alternatively, by condensing the high-temperature and high-humidity humidity in the dishwasher of the dishwasher / dryer with the cooling water, the dishes in the dishwasher can be easily and efficiently dried.

  ADVANTAGE OF THE INVENTION According to this invention, not only the energy-saving effect by a cold cycle heat pump but using the cold air | gas which was discharge | released outside can condense the high temperature, high humidity in a dishwasher, and can improve drying efficiency. .

  According to the present invention, since the electric energy mainly using fossil fuel can be efficiently used by using the cold cycle heat pump, the dishwashing drying method and the dishwashing drying system have a low environmental load. be able to.

(First invention)
The method of washing and drying dishes using the heat of the cold cycle heat pump of the first invention is a washing operation for washing dishes and the like put in a dish washing cabinet, a rinsing operation after washing, and a drying for drying dishes after rinsing. The operation is controlled by sequence control. In the cold cycle heat pump, the first closed circuit is configured so that heating by the compressor, cooling by the expansion valve, and heat in the atmosphere can be exchanged.

  The cold cycle heat pump constituting the first closed circuit compresses the refrigerant by the compressor in the first closed circuit, and the high-temperature refrigerant moves in the heater to move the dishwasher. Heat the inside and wash water. The refrigerant having moved through the heater is expanded and cooled by an expansion valve provided in the first closed circuit. The heat-utilizing dishwashing and drying method of the cold cycle heat pump of the first invention can save energy by skillfully utilizing the heat in the atmosphere.

  In the dish washing and drying method using the heat of the cold cycle heat pump, the heat of the refrigerant obtained in the first closed circuit constituting the cold cycle heat pump is consumed by the heater. The refrigerant that has consumed heat by the heater is vaporized by an expansion valve and then returned to a liquid by an accumulator. Since the refrigerant in the first closed circuit does not use a heat source such as an electric heater, an energy saving effect can be achieved.

(Second invention)
In the dish washing and drying method using the heat of the cold cycle heat pump according to the second aspect of the invention, the refrigerant that has consumed the heat energy is cooled by the heater in the first closed circuit constituting the cold cycle heat pump. The cooled refrigerant circulates in a second closed circuit connected by a heat supply pipe to dry the moisture in the dishwasher.

(Third invention)
According to a third aspect of the present invention, there is provided a dishwashing and drying method using heat of the cold cycle heat pump, wherein the refrigerant cooled in the second closed circuit is vaporized by the expansion valve during the drying operation of the tableware and the like. Become. The cooled antifreeze and / or cooling water circulates in the second closed circuit and exchanges heat with the high-temperature and high-humidity dishwasher air, thereby condensing moisture and drying the dishwasher. .

(Fourth invention)
The dish washing and drying system using the heat of the cold cycle heat pump of the fourth invention is a washing operation for washing dishes and the like put in the dish washing cabinet, a rinsing operation after the washing, and a drying for drying the dishes after rinsing. This is a system for controlling operation by sequence control. The first heat cycle heat pump includes a compressor that heats the refrigerant, an expansion valve that heats the interior of the dishwasher with the heated refrigerant and then cools by expansion, and a refrigerant heating heat exchanger that exchanges heat in the atmosphere. This constitutes a closed circuit. Heat generated by the cold cycle heat pump is used as heating means for the dishwashing / drying apparatus by heating means circulating in the dishwasher through a heat supply pipe.

  In the compressor provided in the heat supply pipe, the refrigerant is heated by pumping up the heat in the atmosphere and compressing it. The expansion valve cools the refrigerant by expanding the refrigerant after passing through a heating means such as a heater, opposite to the compressor. The heating means, the compressor, and the expansion valve are connected to the first closed circuit that constitutes the cold cycle heat pump by a heat supply pipe. According to the fourth aspect of the present invention, energy can be saved by utilizing the heat moved from the atmosphere by the compressor and the expansion valve.

  A refrigerant heating heat exchanger is provided in the first closed circuit constituting the cold cycle heat pump. The refrigerant heating heat exchanger, for example, pumps up atmospheric heat by a fan motor or the like, and returns vaporized refrigerant to a liquid by an accumulator. The refrigerant evaporated by the expansion valve is returned to the liquid by the accumulator, and the same process is repeated by the compressor provided in the first closed circuit to effectively use the heat in the atmosphere. ing.

(Fifth invention)
The second closed circuit of the fifth invention is a heat storage device having a configuration in which at least a cold water sampling heat exchanger, a drying heat exchanger, and a cold water tank are connected by a pipe. The cold water sampling heat exchanger exchanges heat with the refrigerant whose temperature has been lowered by the expansion valve, and further converts it into a low temperature antifreeze and / or cooling water. The cold water tank can store the antifreeze and / or cooling water.

(Sixth invention)
The second closed circuit of the sixth invention is provided with a cold water tank for storing the antifreeze liquid and / or the cooling water cooled by the cold water collecting heat exchanger. When the antifreeze and / or cooling water is circulated through the second closed circuit by the heat storage device circulation pump, the antifreeze and / or cooling water is cooled by the heat exchanged cold air by the heat cycle heat pump. The cold water sampling heat exchanger can efficiently use the cold air after releasing the energy of the refrigerant circulating in the first closed circuit.

(Seventh invention)
The dishwashing and drying system of the seventh invention operates the heat storage device circulation pump at the start of the drying operation, circulates the antifreeze liquid and / or cooling water in the second closed circuit, and operates the cold cycle heat pump in the first closed circuit. It is intended to save power consumption by stopping the operation. At the start of the drying operation, the dishwasher is hot and humid, does not require heat from the cold cycle heat pump, and the antifreeze and / or cooling water stored and cooled in the heat storage device is only in the second closed circuit. It is made to circulate and is heat-exchanged with the high-temperature and high-humidity air in the dishwasher, and becomes a dry state. The dishwasher can use heat from the cold cycle heat pump in the first closed circuit, if necessary, when the internal temperature drops.

  FIG. 1 is a schematic configuration diagram for explaining one embodiment of a tableware washing and drying apparatus according to the present invention. In FIG. 1, the dishwasher / dryer 11 includes at least a dishwasher 12, a cold cycle heat pump 13, a heat storage device 14, and a third closed circuit 15. The dishwasher 12 includes a water supply valve 121 that introduces water into the dishwasher 12, a drain pump 122 that drains the water in the dishwasher 12, and drainage that drains (124) by the drain pump 122. And at least a tube 123.

  The cold cycle heat pump 13 includes a compressor 131 that compresses the refrigerant, a heater 132 that heats the inside of the dishwasher 12, an expansion valve 133 that expands and cools the refrigerant that has passed through the heater 132, and the cooled A cold water sampling heat exchanger 134 for exchanging heat of the refrigerant, a refrigerant heating heat exchanger 135 for heating the cooled refrigerant, a fan motor 136 for heating the refrigerant heating heat exchanger 135 by applying outside air, and the refrigerant It comprises at least an accumulator 137 that returns the refrigerant heated by the heating heat exchanger 135 to a liquid by an expansion valve, and a first closed circuit 139 in which these devices are connected to form a closed circuit by a heat supply pipe 138. ing.

  The heat storage device 14 includes a heat storage device circulation pump 141, a cold water collection heat exchanger 134 for exchanging heat from the cold air from the first closed circuit 139, and a cold water tank 142 for storing the antifreeze liquid and / or cooling water as a refrigerant. The drying heat exchanger 143 condenses the antifreeze liquid and / or the cooling water and dries it, and the second closed circuit 145 is connected so that these devices form a closed circuit by piping.

  The drying heat exchanger 143 takes in moisture from the dishwasher 12 from the air inlet 125 of the dishwasher 12 by a fan motor 151, and removes moisture condensed by the condenser of the drying heat exchanger 143 into the dishwasher. It returns to the vent 126 of the storage 12 and drains (124) from the drain pipe 123 to the outside. In addition, moisture condensed on the peripheral surfaces of the cold water sampling heat exchanger 134, the refrigerant heating heat exchanger 135, and the drying heat exchanger 143 is collected by covers 152, 154, and 155 that cover the peripheral surfaces of the heat exchangers. Then, it passes through the drain pipes 152 ', 15, and 153, and is returned to the vent 126 of the dishwasher 12 as indicated by an arrow. In FIG. 1, the drainage pipes 152 ′, 15, and 153 are drawn ignoring the height relationship, and the water drops from the upper part toward the lower part and returns to the vent 126 of the dishwasher 12. It is like that.

  The cold cycle heat pump 13 constituting the first closed circuit 139 efficiently pumps heat in the atmosphere using the compressor 131 and moves the refrigerant to perform heating, washing operation, and rinsing. A heat source is obtained during operation and drying. The heated refrigerant is cooled by opening the expansion valve 133 and is also heat-exchanged through the cold water collection heat exchanger 134 and circulates through the heat storage device 14 constituting the second closed circuit 145. Cool antifreeze and / or cooling water. The antifreeze and / or cooling water is stored in the cold water tank 142 as a heat source.

  The antifreeze and / or cooling water stored in the cold water tank 142 sucks in the moisture in the dishwasher 12 by the drying heat exchanger 143 provided in the heat storage device 14 constituting the second closed circuit 145. It takes in with the fan motor 151 from the opening | mouth 125, and is condensed. Further, the moisture obtained as a result of the condensation is drained 124 from the vent 126 of the dishwasher 12 through the drain pipes 15 and 123 as shown by the arrows in the figure. The antifreeze and / or cooling water in the cold water tank 142 is cooled by heat exchange of the cold water collecting heat exchanger 134 while circulating through the second closed circuit 145 by the heat storage device circulation pump 141.

  When the cooling cycle heat pump 13 is heated and driven, the temperature detection means (not shown) installed in the cold water tank 142 causes the fan of the refrigerant heating heat exchanger 135 when the detected temperature is equal to or lower than a predetermined temperature. The motor 136 is driven to discharge cool air to the outside air. When the detected temperature is equal to or higher than a certain temperature, the heat storage device circulation pump 141 provided in the heat storage device 14 is driven to store cold air in the cold water tank 142 through the cold water collecting heat exchanger 134. . The heat energy obtained by the refrigerant heating heat exchanger 135 returns the refrigerant to a liquid by an accumulator 137 provided in the first closed circuit 139.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example. The present invention can be modified in various ways without departing from the scope of the claims. For example, pipes such as a structure inside a dishwasher, a sequence control, a heat exchanger, a pump and the like can be publicly known or publicly known.

It is a schematic block diagram for demonstrating one Example of the dishwashing drying apparatus in this invention. (Example)

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Dishwashing and drying apparatus 12 ... Dishwasher 121 ... Water supply valve 122 ... Drain pump 123 ... Drain pipe 124 ... Drain 125 ... Intake port 126 ... Vent 13 ... Cold cycle heat pump 131 ... Compressor 132 ... Heater 133 ... Expansion valve 134 ... Cold water sampling heat exchanger 135 ... Refrigerant heating heat exchanger 136 ... Fan motor 137 ..Accumulator 138 ... Heat supply pipe 139 ... First closed circuit 14 ... Heat storage device 141 ... Heat storage device circulation pump 142 ... Cold water tank 143 ... Drying heat exchanger 145 ... 2nd closed circuit 15 ... 3rd closed circuit (drainage pipe)
151: Fan motor 152, 154, 155 ... Cover 153, 152 '... Drain pipe

Claims (7)

Washing operation, rinsing operation, and drying operation are controlled by sequence control, and in the dish washing and drying method using the heat of the cold cycle heat pump,
The compressor compresses the refrigerant, heats the high temperature refrigerant in the heater and heats the dishwasher and the washing water,
Expanding and cooling the refrigerant that has moved through the heater;
The cooled refrigerant pumps up atmospheric heat by a refrigerant heating heat exchanger,
A dishwashing and drying method using heat of a cold cycle heat pump that performs the heating and cooling in a first closed circuit.   The antifreeze liquid in the cold water tank is cooled and circulated by the cooled refrigerant obtained in the first closed circuit constituting the cold cycle heat pump, and consists of a second closed circuit for drying the moisture in the dishwasher. The dish washing drying method using the heat of the cold cycle heat pump according to claim 1.   During drying of the dishwashing / drying apparatus, the antifreeze and / or cooling water circulating in the second closed circuit is cooled by the refrigerant evaporated and cooled by the expansion valve, and the high-temperature and high-humidity air in the dishwasher is stored. 3. The dishwashing and drying method using heat of the cold cycle heat pump according to claim 1 or 2, wherein moisture is condensed by exchanging heat with the heat. In the dishwashing and drying system using the heat of the cold cycle heat pump, the washing operation, the rinsing operation, and the drying operation are controlled by sequence control.
Heating means that uses heat generated by a cold cycle heat pump as a heat source of the dishwashing and drying apparatus via a heat supply pipe,
A compressor provided in the heat supply pipe for pumping and heating heat in the atmosphere and an expansion valve for expanding and cooling;
A first closed circuit constituting a cooling cycle heat pump in which the heating means, the compressor, and the expansion valve are connected by a heat supply pipe and the refrigerant circulates;
A dishwashing and drying system using the heat of a cold cycle heat pump comprising at least   The antifreeze and / or cooling water cooled through the cold water sampling heat exchanger is circulated by the refrigerant circulating in the first closed circuit constituting the cold cycle heat pump to condense the moisture in the dishwasher and dry it. The heat storage device which comprises the 2nd closed circuit by which the drying heat exchanger to perform and the cold water tank which stores the said antifreeze and / or cooling water are connected by the pipe | tube is provided. A dishwashing and drying system using the heat of the described cold cycle heat pump.   The second closed circuit circulates antifreeze liquid or cooling water by a heat storage device circulation pump, and is provided with a cold water tank for storing the antifreeze liquid and / or cooling water. A dishwashing and drying system using the heat of the cold cycle heat pump described in 1. At the beginning of the drying operation, the heat storage device circulation pump is operated,
Circulating antifreeze and / or cooling water of the second closed circuit,
Heat exchange with hot and humid air in the dishwasher,
When the temperature in the dishwasher is high,
Without operating the cold cycle heat pump,
The dishwashing / drying system according to any one of claims 4 to 6, wherein the cold cycle heat pump is operated due to a temperature drop.

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