JP2008136639A - Dishwasher and drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher and drier which sequence-controls washing operation, rinsing operation or drying operation of dishes and which uses the heat of a cold cycle heat pump. <P>SOLUTION: The dishwasher and drier sequence-controls the washing operation of washing dishes or the like housed in a dish washing compartment, the rinsing operation after the washing or the drying operation of drying the rinsed dishes and uses the heat in the atmosphere by a cold cycle heat pump as a heat source used in the dish washing cabinet. In the cold cycle heat pump, a compressor for heating a coolant, an expansion valve which heats inside of the dish washing cabinet etc. with a part of the heat and thereafter cooling the coolant whose temperature is lowered by expansion and a coolant heating heat exchange which exchanges heat in the atmosphere constitute a first close circuit. The heat generated by the cool cycle heat pump is used as a heating means which heats the inside of the dish washing compartment through a heat feeding pipe and/or a heating means of washing water. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dishwashing / drying apparatus that sequentially executes a washing process, a rinsing process, or a drying process of tableware and the like by using the heat of a cold cycle heat pump by sequence control. In particular, the present invention uses a combination of an efficient refrigeration cycle heat pump that pumps air 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 apparatus using the heat of an improved cold heat cycle heat pump.

  A conventional dishwashing / drying apparatus stores dishes in a dishwasher, operates a start switch, selects a desired cleaning course, and operates a start switch to operate each selected process. According to conditions, a washing process, a rinsing process, and a drying process are sequentially performed to wash, rinse, and dry the dishes.

  In the washing process of the dishwashing / drying apparatus, generally the water is placed in a dishwasher for a certain amount, and the washing is performed while spraying water pressurized by the pump toward the dishes etc. while heating with a heater. The sequence control circuit controls the cleaning course based on the set time, set temperature, and the like.

  Whether or not the next water rinsing process is performed can be selected for each selected course. In the step, since a certain amount of water is again in the dishwasher, the water pressurized by the pump is sprayed toward the tableware, etc., the tableware is rinsed, and after a certain period of time, the water injection is stopped by the pump. Drain the water in the washing cabinet, finish the water rinsing process, and move to the next process.

  In the next hot water rinse step, because a certain amount of water is again in the dishwasher, the water is heated with a heater, and the pump is sprayed with pressurized water toward the tableware, rinsing the tableware, etc. The water jet in is stopped, the water in the dishwasher is drained, the hot water rinsing process is terminated, and the process proceeds to the next process.

  In the next drying step, the air in the dishwasher, which has become hot and humid by heating the air in the dishwasher with a heater, is sent to the dehumidifying means by a circulation fan, and the dehumidifying means supplies the hot and humid air. By cooling by heat exchange with the outside air taken in by a cooling fan, condensation is generated, and the condensation is discharged to dehumidify and dry the tableware, etc., and after the predetermined time has elapsed, the drying process is completed. The whole process of the dishwashing / drying apparatus is completed. The predetermined time for the drying step is calculated in advance by experiment or the like until the dehumidification is completed. However, since it is only heat exchange by air cooling, it takes time. The dishwashing / drying apparatus is described in, for example, Japanese Patent Laid-Open No. 6-9849.

However, in recent years, the use of waste heat, shortening of operation time, and the like have been proposed for the dishwasher / dryer from the viewpoint of reducing the running cost for the purpose of energy saving. Moreover, the dishwashing / drying apparatus is required not only to exhibit a stable washing ability, but also to be highly efficient or improve the environment.
JP-A-6-98849

  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. INDUSTRIAL APPLICABILITY The present invention can use waste heat during operation of a dishwashing / drying apparatus by using a cold cycle heat pump, and can store the cool air generated during heating and the dishwashing using the heat of the cold cycle heat pump. An object is to provide a drying apparatus. Another object of the present invention is to provide a dishwashing / drying apparatus using the heat of a cold cycle heat pump that can improve drying efficiency by condensing a low-temperature refrigerant when drying tableware or the like.

(First invention)
The dish washing and drying apparatus using the heat of the cold cycle heat pump of the first 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. A heating means for heating the inside of the dishwasher with a part of the heat heated by the compressor, an expansion valve, a low-temperature sampling heat exchanger, and a refrigerant heating heat exchanger are connected in series by a heat supply pipe, so that hot air and cold air are A first closed circuit constituting a cold cycle heat pump for circulation and a low temperature collection heat exchanger, a heat storage tank, and a drying heat exchanger are connected in series by piping, and heat exchange is performed by the low temperature collection heat exchanger. A second closed circuit for circulating cold air by a pump, and a third closed circuit for removing moisture in the dishwasher by a drying heat exchanger and returning it to the dishwasher Characterized in that it is configured even without.

(Second invention)
The dishwashing / drying apparatus using the heat of the cold cycle heat pump of the second invention has a drain that is generated around the low-temperature sampling heat exchanger and the refrigerant heating heat exchanger of the first invention in the dishwasher via a discharge pipe. It is characterized by being returned to.

(Third invention)
The dishwashing / drying apparatus using the heat of the cold cycle heat pump of the third invention is provided with the second closed circuit in the first invention or the second invention, and the antifreeze filled in the heat storage tank is caused to pass through the second closed circuit by the pump. It is characterized by circulation.

(Fourth invention)
The dish washing and drying apparatus using the heat of the cold cycle heat pump according to the fourth aspect of the present invention exhibits condensation that adheres to the surroundings of the low-temperature sampling heat exchanger, the refrigerant heating heat exchanger, and the drying heat exchanger according to the first to third aspects of the invention. A receiving cover is provided.

(Fifth invention)
In the dish washing and drying apparatus using the heat of the cold cycle heat pump according to the fifth aspect of the invention, the third closed circuit of the first to fourth aspects of the invention is the above described through the fan motor and the drying heat exchanger from the intake port of the dish washing cabinet. It is connected to the vent of the dishwasher.

(Sixth invention)
The dish washing and drying apparatus using the heat of the cold cycle heat pump according to the sixth aspect of the invention includes the low temperature sampling heat exchanger, refrigerant heating heat exchanger, and drying heat exchanger according to the first to fifth aspects of the invention in the dish washing cabinet. It is arranged at a position higher than the water level to supply water.

  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.

  ADVANTAGE OF THE INVENTION According to this invention, it is the dishwashing drying apparatus aiming at energy saving which can shorten the drying time of a drying process using the waste heat during operation | movement of the dishwashing drying apparatus. In addition, water droplets formed by condensation near the heat exchanger that occurs during heat exchange are returned to the dishwasher, and a cover is provided on the portion where condensation occurs so that the vicinity can be kept clean.

  According to the present invention, the antifreeze liquid in the cold water tank of the heat storage device can be cooled using air having a temperature lower than the outside air discharged during the heating operation of the cold cycle heat pump. By condensing moisture in the dishwasher of the dishwashing / drying apparatus, it can be easily and efficiently dried.

  ADVANTAGE OF THE INVENTION According to this invention, not only the energy-saving effect by a cold-heat cycle heat pump but the cool air discharged | emitted outside can be utilized to condense the humidity in a dishwasher, and to 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, it is possible to provide a dishwashing and drying apparatus with a low environmental load.

(First invention)
The dishwashing / drying apparatus of the first invention controls, by sequence control, a washing operation for washing tableware and the like put in a dishwasher, a rinsing operation after the washing, and a drying operation for drying the rinsed tableware and the like. At the same time, heat in the atmosphere is used as a heat source used in the dishwasher by a cold cycle heat pump. The cold cycle heat pump is a compressor that heats the refrigerant, an expansion valve that cools the refrigerant whose temperature has decreased by expansion after heating the interior of the dishwasher with the heated heat, and heat in the atmosphere. The refrigerant heating heat exchanger to be replaced constitutes a first closed circuit. The heat generated by the cold cycle heat pump is utilized as a heating means for heating the inside of the dishwasher through a heat supply pipe and / or a heating means for washing water. The first invention can achieve energy saving by utilizing the heat moved from the atmosphere by the compressor and the expansion valve.

(Second invention)
In the dishwashing / drying apparatus according to the second aspect of the present invention, a drain generated around the low-temperature sampling heat exchanger and the refrigerant heating heat exchanger provided in the first closed circuit is vented to the dishwasher through a discharge pipe. It returns to the inside through the mouth. Many water droplets adhere to the periphery of the low-temperature sampling heat exchanger and the refrigerant heating heat exchanger due to the temperature difference between the inside and the outside. However, the water droplets are returned to the dishwasher through the discharge pipe and do not give moisture to the surroundings of the dishwasher / dryer, so that no unpleasant smell is generated.

(Third invention)
The tableware washing and drying apparatus of the third invention is provided in the second closed circuit and circulates antifreeze liquid in the heat storage tank by a pump. The antifreeze liquid circulating in the second closed circuit is cooled by a low-temperature sampling heat exchanger, and cold air can be stored in the heat storage tank.

(Fourth invention)
The tableware washing and drying apparatus according to a fourth aspect of the present invention is provided with a cover for receiving condensation attached around the low-temperature sampling heat exchanger, the refrigerant heating heat exchanger, and the drying heat exchanger. Condensation adhering to the surroundings of the low-temperature sampling heat exchanger, the refrigerant heating heat exchanger, and the drying heat exchanger is dropped into the cover as water droplets by its own weight, and then returned to the dishwasher through the drain pipe. Therefore, the surroundings of each heat exchanger can be kept clean.

(Fifth invention)
In the dishwashing / drying apparatus according to the fifth aspect of the present invention, moisture is dried by a fan motor from a suction port of the dishwasher through a drying heat exchanger, and then the dried air is returned from the vent of the dishwasher to the inside. It is.

(Sixth invention)
A dish washing and drying apparatus according to a sixth aspect of the present invention is a first closed circuit constituting a cold cycle heat pump, a second closed circuit for performing drying heat exchange, and a third closed circuit for drying moisture in the dish washing cabinet. Is provided. The low-temperature sampling heat exchanger, the refrigerant heating heat exchanger, and the drying heat exchanger provided in the closed circuits are arranged at a position higher than the water level to be supplied into the dishwasher, so that each heat exchanger Water droplets adhering to the inside of the dish return to the dishwasher by its own weight.

  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 second closed circuit 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 water in the dish washer 12, and a drain pipe 123 that drains 124 by the drain pump 122. And an air inlet 125 for sucking in high-humidity air in the dishwasher, and a vent 126 for allowing dew adhering to each heat exchanger to be described later to flow into the dishwasher 12 through the exhaust pipe 15 and the like. At least.

  The cold cycle heat pump 13 includes a compressor 131 that compresses refrigerant, a heater 132 that heats the dishwasher by circulating the refrigerant in the dishwasher 12, and refrigerant that passes through the heater 132. An expansion valve 133 that expands and cools, a cold water sampling heat exchanger 134 that exchanges heat with the cooled refrigerant, a refrigerant heating heat exchanger 135 that heats the cooled refrigerant, and the refrigerant heating heat exchanger 135 A fan motor 136 that heats the outside by applying air to the outside, an accumulator 137 that returns the refrigerant vaporized by the expansion valve 133 to a liquid, and a first closed circuit in which these devices are connected by a heat supply pipe 138 to form a closed circuit. And at least a circuit 139.

  The second closed circuit 14 includes a heat storage device circulation pump 141, a cold water collection heat exchanger 134 for exchanging heat from the refrigerant from the first closed circuit 139, a cold water tank 142 for storing the refrigerant, and the cold air. A drying heat exchanger 143 that condenses and dries is connected to these devices in a closed circuit by piping.

  The drying heat exchanger 143 takes in moisture from the dishwasher 12 from the inlet 125 of the dishwasher 12 by a fan motor 151, and converts moisture condensed by the condenser of the drying heat exchanger 143 to the drying heat. They are collected by a cover 152 provided around the exchanger 143, returned to the vent 126 through the drain pipes 152 'and 15 of the dishwasher 12, and drained from the drain pipe 123 to the outside. Further, moisture generated by dew condensation on the peripheral surfaces of the cold water collecting heat exchanger 134 and the refrigerant heating heat exchanger 135 is collected by the covers 154 and 155, and moved in the direction of the arrow by the drain pipe 153, and the tableware It is returned to the vent 126 of the cleaning cabinet 12.

  In FIG. 1, the piping is drawn with the height relationship ignored, so that water drops from the upper part toward the lower part and returns to the vent 126 of the dishwasher 12. The cover provided around each of the heat exchangers 134, 135, and 143 is, for example, a water drop receiving tray having a U-shape, and the water drop is placed on the vent 126 through the drain pipe 153 or the like. Drop it.

  The cold cycle heat pump 13 constituting the first closed circuit 139 efficiently heats up and moves the air heat using the compressor 131 to perform heating, washing operation, rinsing operation, A heat source is obtained during the drying operation. The heated air is cooled by opening the expansion valve 133 and is also heat-exchanged through the cold water collection heat exchanger 134 and stored in a cold water tank 142 provided in the second closed circuit 14. It is done.

  The cold air stored in the cold water tank 142 is taken in by the drying heat exchanger 143 provided in the second closed circuit 14 and the moisture in the dishwasher 12 is taken in from the air inlet 125 by the fan motor 151 and condensed. . Further, the moisture obtained as a result of the condensation enters the dishwasher 12 through the vent 126 of the dishwasher 12, as shown by the arrow in the figure, and drains 124 through the drain pipe 123. The antifreeze liquid in the cold water tank 142 can be stored in the cold water tank 142 together with the cold air, and is cooled while circulating through the second closed circuit 14 by the 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 circulation pump 141 provided in the second closed circuit 14 is driven so as to store cold air in the cold water tank 142 via the cold water collecting heat exchanger 134. To do. The heat energy obtained by the refrigerant heating heat exchanger 135 is stored in 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 ... Second closed circuit 141 ... Circulating pump 142 ... Cold water tank 143 ... Drying heat exchanger 15 ... -3rd closed circuit 151 ... Fan motor 152 ... Cover 153 ... Drain pipe

Claims (6)

Washing operation, rinsing operation, and drying operation are controlled by sequence control, and in the dish washing and drying apparatus using the heat of the cold cycle heat pump,
A compressor, heating means for heating the inside of the dishwasher with a part of the heat heated by the compressor, an expansion valve, a low-temperature sampling heat exchanger, and a refrigerant heating heat exchanger are connected in series by a heat supply pipe, And a first closed circuit constituting a cold cycle heat pump for circulating cold air,
A second closed circuit in which a low-temperature sampling heat exchanger, a heat storage tank, and a drying heat exchanger are connected in series by a pipe, and the cold air heat-exchanged by the low-temperature sampling heat exchanger is circulated by a pump;
A third closed circuit for removing moisture in the dishwasher by means of a drying heat exchanger and returning it to the dishwasher;
A dishwashing / drying apparatus using heat of a cold cycle heat pump characterized by comprising at least   2. The heat of the cold cycle heat pump according to claim 1, wherein a drain generated around the low-temperature sampling heat exchanger and the refrigerant heating heat exchanger is returned to the dishwasher through a discharge pipe. Dishwashing and drying equipment using   The antifreeze liquid provided in the second closed circuit and filled in the heat storage tank circulates in the second closed circuit by a pump, and generates heat of the cold cycle heat pump according to claim 1 or 2. The dishwasher / dryer used.   4. The cover according to claim 1, wherein the low-temperature sampling heat exchanger, the refrigerant heating heat exchanger, and the drying heat exchanger are provided with a cover that receives condensation attached to the surroundings. Tableware washing and drying equipment using the heat of a cold cycle heat pump described in 1.   5. The cooling / heating according to claim 4, wherein the third closed circuit is connected to a vent of the dishwasher through a fan motor and a drying heat exchanger from an inlet of the dishwasher. A dishwasher / dryer that uses the heat of a cycle heat pump.   The low-temperature sampling heat exchanger, the refrigerant heating heat exchanger, and the drying heat exchanger use heat of a cold cycle heat pump, which is arranged at a position higher than a water level supplied to the dishwasher. Dishwashing and drying equipment.

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