JP2005265213A - Heat pump type hot-water supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an integral heat pump type hot-water supply device capable of improving conveyance property and installation property while maintaining construction property of pipe connection. <P>SOLUTION: This heat pump type hot-water supply device has refrigerating cycle constituted by filling refrigerant into a refrigerant circuit connecting a compressor, a water-refrigerant heat exchanger, a pressure reducing valve, and an air-refrigerant heat exchanger like a ring and is provided with a tank/water circuit constituted by connecting a first hot-water storage tank with a second hot-water storage tank. This heat pump type hot-water supply device is composed of two units including the first unit in which refrigerating cycle and the first hot-water storage tank are arranged and the second unit in which the second hot-water storage tank is arranged. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a tank-integrated heat pump type water heater having a refrigeration cycle, a tank, and a water circuit.

  As a conventional heat pump type water heater, there is an instantaneous type heat pump water heater (manufactured by Hitachi: RHK-23BAV) in which an “instantaneous heat pump water heater” having a refrigeration cycle and a tank circuit is commercialized (for example, Non-Patent Document 1). reference).

  FIG. 10 is a circuit configuration diagram of a conventional heat pump type water heater, and FIG. 11 is a schematic configuration diagram of the heat pump type water heater shown in FIG.

  The heat pump type hot water heater shown in FIG. 11 includes a refrigeration cycle including a compressor 1, a water-refrigerant heat exchanger 2, a pressure reducing valve 3, an air-refrigerant heat exchanger 4, and the like, a hot water storage tank 6, a mixing valve 7, And a tank circuit comprising a solenoid valve 8, a hot water supply circulation pump 9, a hot water recirculation pump 10 and the like. The hot water is generated by a refrigeration cycle and directly supplied to a faucet or a bathtub, or hot water is stored from the tank circuit. Hot water supply. As shown in FIG. 10, this heat pump type hot water heater is configured as an integrated type in which all of the refrigeration cycle and the tank circuit are accommodated in one unit.

In addition, as a hot water heater that uses midnight power to boil hot water at a low electricity bill, there is a hot water storage type heat pump water heater, which is generally divided into two units, a heat pump unit and a tank unit.
Weekly air conditioner distributor May 15, 2003 issue (VOL.24-No.896)

  However, the above conventional heat pump water heater is composed of an integrated unit in which all the refrigeration cycles and tank circuits are housed in one unit, and has excellent workability such as few pipe connections, but the unit itself is large. Since the weight is heavy, there is a problem that installation is poor and conveyance is difficult.

  This invention solves such a conventional subject, and it aims at improving a transportability and installation property, maintaining workability, such as piping connection.

  In order to solve the above-mentioned problem, the heat pump type hot water heater of the present invention according to claim 1 is a refrigerant circuit in which a compressor, a water-refrigerant heat exchanger, a pressure reducing valve, and an air-refrigerant heat exchanger are connected in an annular shape. A heat pump type water heater having a refrigeration cycle configured by filling a refrigerant and having a tank / water circuit configured by connecting a first hot water storage tank and a second hot water storage tank, the heat pump type The hot water heater is composed of two units: a first unit in which the refrigeration cycle and the first hot water storage tank are disposed, and a second unit in which the second hot water storage tank is disposed.

  According to a second aspect of the present invention, in the heat pump water heater compressor according to the first aspect, a pressure relief valve and a drain valve are disposed in the second unit.

  According to a third aspect of the present invention, in the heat pump type water heater according to the first or second aspect, a structure is provided in which pipes are intermediately connected on the front surface of the first unit or the second unit.

  According to a fourth aspect of the present invention, in the heat pump water heater according to the first or second aspect, a pipe connection port mounting plate is disposed on the front surface of the first unit or the second unit, and the pipe connection port is further provided. It is characterized in that a pipe connection port is provided on the mounting plate to make a pipe connection.

  According to a fifth aspect of the present invention, in the heat pump hot water heater according to any one of the first to fourth aspects, the total volume of the first hot water storage tank and the second hot water storage tank is changed from 100L to 200L. It is characterized by.

  According to a sixth aspect of the present invention, in the heat pump type water heater according to any one of the first to fifth aspects, the refrigeration cycle is filled with CO2.

  The present invention has a refrigeration cycle configured by filling a refrigerant into a refrigerant circuit in which a compressor, a water-refrigerant heat exchanger, a pressure reducing valve, and an air-refrigerant heat exchanger are connected in an annular shape, and the first A heat pump type hot water heater provided with a tank / water circuit configured by connecting a hot water storage tank and a second hot water storage tank, wherein the heat pump type hot water heater includes a first unit in which the refrigeration cycle and the first hot water storage tank are disposed. The second unit for arranging the second hot water storage tank has a two-unit structure. According to this configuration, the unit is divided to reduce the weight per unit and improve the transportability. Can be achieved. In addition, by making it possible to divide and install even in a space that cannot be installed in an integrated type, installation can be improved.

  Further, the present invention is such that in the heat pump type hot water heater, a pressure relief valve and a drain valve are further provided in the second unit. According to this configuration, only the first unit is provided. When using an integrated heat pump type hot water heater with a small small capacity tank, it can be configured with a slight change in piping design. One tank integrated type heat pump type hot water heater and two tanks can be divided. Costs can be reduced by sharing parts with the first unit of the water heater.

  Further, the present invention is such that in the heat pump type hot water heater, the pipe is further intermediately connected on the front surface of the first unit or the second unit. According to this configuration, the pipe connection is performed on the front surface. Therefore, it is possible to improve the workability and maintainability such as the connection of pipes at the time of divided installation or integral installation. Further, the intermediate connection can reduce the cost of the pipe connection portion.

  In the heat pump type hot water heater according to the present invention, a pipe connection port mounting plate is further provided on the front surface of the first unit or the second unit, and a pipe connection port is further provided on the pipe connection port mounting plate. In this structure, the cost of the pipe connection portion is increased, but the workability can be improved.

  Further, the present invention is such that in the heat pump type hot water heater, the total internal volume of the first hot water storage tank and the second hot water storage tank is changed from 100L to 200L. The balance between capacity and tank volume is the best, and the entire system can be reduced in size and cost.

  Further, the present invention is the heat pump type hot water heater in which CO2 is filled in the refrigeration cycle. According to this configuration, the global warming coefficient can be reduced with respect to the conventional chlorofluorocarbons such as R410A and the environment. We can provide a gentle heat pump water heater.

  The first embodiment of the present invention includes a refrigeration cycle configured by filling a refrigerant into a refrigerant circuit in which a compressor, a water-refrigerant heat exchanger, a pressure reducing valve, and an air-refrigerant heat exchanger are connected in an annular shape. And a heat pump type hot water heater having a tank / water circuit configured by connecting a first hot water storage tank and a second hot water storage tank, wherein the heat pump hot water heater comprises the refrigeration cycle and the first hot water storage tank. The first unit to be disposed and the second unit to be disposed with the second hot water storage tank in the previous period are configured as two units. According to the present embodiment, by dividing the unit, the weight per unit can be reduced and the transportability can be improved. In addition, even in a space that cannot be installed in an integrated type, the installability can be improved by enabling the split installation.

  The second embodiment of the present invention has a structure in which a pressure relief valve and a drain valve are arranged in the second unit in the heat pump type water heater according to the first embodiment. According to the present embodiment, when an integrated heat pump type hot water heater of a small small capacity tank is configured using only the first unit, it can be configured by slightly changing the piping design. Cost reduction can be achieved by sharing parts with the first unit of the body type heat pump type hot water heater and the heat pump type hot water heater that can be divided into two tanks.

  The third embodiment of the present invention is a heat pump type water heater according to the first or second embodiment, in which a pipe is intermediately connected on the front surface of the first unit or the second unit. According to the present embodiment, pipe connection can be performed on the front surface, and it is possible to improve workability and maintainability such as pipe connection during divided installation and integral installation. Further, the intermediate connection can reduce the cost of parts in the pipe connection portion.

  According to a fourth embodiment of the present invention, in the heat pump type water heater according to the first or second embodiment, a pipe connection port mounting plate is disposed on the front surface of the first unit or the second unit, and A pipe connection port is provided on the pipe connection port mounting plate to connect the pipes. According to the present embodiment, the cost of the pipe connection portion is increased, but the workability can be improved.

  According to a fifth embodiment of the present invention, in the heat pump hot water heater according to the first to fourth embodiments, the total volume of the first hot water storage tank and the second hot water storage tank is changed from 100L to 200L. It is a thing. According to this embodiment, the balance between the capacity of the heat pump and the tank volume is the best, and the entire system can be reduced in size and cost.

  In the sixth embodiment of the present invention, in the heat pump type water heater according to the first to fifth embodiments, the refrigeration cycle is filled with CO2. According to this Embodiment, a warming coefficient can be reduced with respect to CFCs, such as conventional R410A, and an environment-friendly heat pump type hot water heater can be provided.

(Example 1)
FIG. 1 is a circuit configuration diagram showing a heat pump type hot water heater according to a first embodiment of the present invention, and FIG. 2 is a structural diagram of the heat pump type hot water heater shown in FIG.

  The heat pump type water heater of the first embodiment shown in FIG. 1 and FIG. 2 includes a compressor 1, a hot water supply water-refrigerant heat exchanger 2-a, a bath cooking water-refrigerant heat exchanger 2-b, and a pressure reducing valve 3. The refrigeration cycle is configured by filling a refrigerant into a refrigerant circuit in which the air-refrigerant heat exchanger 4 is annularly connected. Further, the first hot water storage tank 6-a, the second hot water storage tank 6-b, the first mixing valve 7-a, the second mixing valve 7-b, the third mixing valve 7-c, the electromagnetic valve 8, and the hot water supply circulation pump. 9. Bath recirculation pump 10, hot water storage three-way valve 11-a, bath three-way valve 11-b, pressure relief valve 12, first drain valve 13-a, second drain valve 13-b, etc. with piping It has a connected tank / water circuit. The water-refrigerant heat exchangers 2-a and 2-b function as condensers, and the air-refrigerant heat exchanger 4 functions as an evaporator.

  As shown in FIG. 2, the heat pump type hot water heater of the embodiment includes a first unit in which the refrigeration cycle and the first hot water storage tank 6-a are arranged, a second hot water storage tank 6-b, and the like. The second unit to be installed is divided into two units, and the first unit and the second unit are combined with each other as an integrated water heater, and each unit is divided and installed. Is possible.

  The operation of the heat pump type water heater is as follows.

  First, when water is supplied, the faucet 14 is opened and a refrigeration cycle such as the compressor 1 is operated to start hot water supply. In the refrigeration cycle, the refrigerant compressed by the compressor 1 dissipates heat in the hot water supply-refrigerant heat exchanger 2-a, and the condensed refrigerant flows into the pressure reducing valve 3 and expands. Heat exchange with the air sent by the blower 5 evaporates to become a gas refrigerant. This gas refrigerant is sucked into the compressor 1 and compressed again.

  Then, hot water is generated by heating water in the hot water supply-refrigerant heat exchanger 2-a, and hot water is supplied from the faucet 14 through the mixing valve 7-a and the mixing valve 7-c. To do. The faucet 14 is closed, the compressor 1 and the like are stopped, and the hot water supply is finished.

  On the other hand, when the hot water is stored in the first hot water storage tank 6-a and the second hot water storage tank 6-b, the refrigeration cycle and the hot water supply circulation pump 9 are operated, and the hot water supply water-refrigerant heat is the same as in the case of the direct hot water supply. Water is heated by the exchanger 2-a to generate hot water, and the hot water is switched to the hot water storage side by closing the mixing valve 7-a, and the hot water storage tank 6-b is passed through the hot water storage three-way valve 11-a. To store hot water.

  When the hot water in the hot water storage tanks 6-a and 6-b is discharged, the refrigeration cycle and the hot water supply circulation pump 9 are stopped, the mixing valve 7-a is switched, and the hot water storage is performed via the mixing valve 7-c. The hot water in the tank 6-b is discharged from the tap 14. In this case, the water supply flows in from the lower part of the hot water storage tank 6 with water pressure, and pushes out the hot water from the upper part of the hot water storage tank 6.

  Further, when re-preparing the bath, the refrigerating cycle and the re-circulating pump 10 for re-cooking the bath were operated and sent from the re-circulating pump 10 for re-cooking the bath with the water-refrigerant heat exchanger 2-b for re-heating the bath. Water is heated to produce hot water, and this hot water is supplied to the bathtub 15 for additional cooking.

  According to this embodiment, by dividing the unit into two, the weight per unit can be reduced and the transportability can be improved. Further, by enabling not only the integral installation but also the split installation, the installation can be improved by enabling the installation even in a space that cannot be installed by the integral type.

(Example 2)
FIG. 3 is a circuit configuration diagram showing a heat pump type hot water heater according to a second embodiment of the present invention, and FIG. 4 is a structural diagram of the heat pump type hot water heater shown in FIG.

  As in the first embodiment, the heat pump type water heater of the second embodiment shown in FIG. 4 includes a refrigeration cycle and a tank circuit, and can be divided into two units. In addition, the second hot water storage tank, the pressure relief valve, and the drain valve are arranged.

  The operation of the heat pump type hot water heater of this embodiment is the same as that of the first embodiment, and the description thereof is omitted.

  According to the present embodiment, when an integrated heat pump type hot water heater of a small small capacity tank is configured by using only the first unit, it can be configured with only a slight change in the piping design. The cost can be reduced by sharing the parts with the first unit of the heat pump type hot water heater and the heat pump type hot water heater that can be divided into two tanks.

(Example 3)
FIG. 5 is a structural view showing a heat pump type water heater of a third embodiment according to the present invention.

  The heat pump type water heater of the third embodiment shown in FIG. 5 has a configuration including a refrigeration cycle and a tank / water circuit as in the first embodiment, and is further provided on the front surface of the first unit or the second unit. In this structure, pipes are intermediately connected with pipe screws 16.

  The operation of the heat pump type hot water heater of this embodiment is the same as that of the first embodiment, and the description thereof is omitted.

  According to the present embodiment, the pipe connection can be made on the front surface of the unit by the pipe screw 16, and it is possible to improve workability such as pipe connection and maintainability at the time of divided installation or integral installation. Further, it is possible to reduce the number of parts, such as eliminating the need to provide a pipe connection port mounting plate and a pipe connection port by intermediate connection, and cost reduction can be achieved.

Example 4
FIG. 6 is a perspective view showing a flare type joint used for pipe connection of a heat pump type water heater of a fourth embodiment according to the present invention.

  As in the third embodiment, the heat pump type water heater of the fourth embodiment has a configuration including a refrigeration cycle and a tank circuit, and further uses a flare connection 16-a as a connection method of the pipe. Is.

  According to the present embodiment, by using the flare connection 16-a, it is possible to improve the workability and reduce the cost of parts.

(Example 5)
FIG. 7 is a perspective view showing a swage lock type joint used for pipe connection of a heat pump type water heater according to a fifth embodiment of the present invention.

  As in the third embodiment, the heat pump type water heater of the fifth embodiment includes a refrigeration cycle and a tank circuit. Further, as a connection method of the pipe, Swagelok (registered trademark) connection 16-b It is made into the structure using.

  According to the present embodiment, it is possible to reduce the cost of the pipe connection portion by performing an intermediate connection using the swage lock connection 16-b. In addition, the workability can be improved as compared with the flare method.

(Example 6)
FIG. 8 is a perspective view showing a quick joint type joint used for pipe connection of the heat pump type water heater of the sixth embodiment according to the present invention.

  As in the third embodiment, the heat pump type water heater of the sixth embodiment has a configuration including a refrigeration cycle and a tank circuit, and further uses a quick joint connection 16-c as the pipe connection method. It is a thing.

  According to the present embodiment, it is possible to further improve the workability as compared with the flare method and the swage lock method.

(Example 7)
FIG. 9 is a structural view showing a heat pump type water heater according to a seventh embodiment of the present invention.

  As in the first embodiment, the heat pump type water heater of the seventh embodiment shown in FIG. 9 is configured to include a refrigeration cycle and a tank circuit, and is further connected to the front surface of the first unit or the second unit. A connection port mounting plate is provided, and a pipe connection port is further provided on the pipe connection port mounting plate to connect a pipe.

  According to the present embodiment, since parts such as a pipe mounting plate and a pipe connection port are added, the cost is increased, but the workability can be improved.

(Example 8)
In the heat pump type hot water heater according to any one of claims 1 to 7, the heat pump type hot water heater of the eighth embodiment according to the present invention is divided into two units, and can be integrally installed and dividedly installed. The total internal volume of the first hot water storage tank and the second hot water storage tank is changed from 100L to 200L (not shown).

  According to the present embodiment, the balance between the capacity of the heat pump and the tank volume is the best, and the entire system can be reduced in size and cost.

Example 9
The heat pump type hot water heater of the ninth embodiment according to the present invention is divided into two units, and can be integrally installed and dividedly installed. The refrigeration cycle is filled with CO2 (not shown).

  According to the present embodiment, it is possible to provide a heat pump type water heater that can reduce the global warming coefficient with respect to conventional chlorofluorocarbons such as R410A and is friendly to the global environment.

1 is a circuit configuration diagram of a heat pump type hot water heater showing a first embodiment of the present invention. Structure of the heat pump type hot water heater shown in FIG. The circuit block diagram of the heat pump type water heater which shows the 2nd Example of this invention Structural diagram of the heat pump water heater shown in FIG. Structural drawing of a heat pump type water heater showing a third embodiment of the present invention The perspective view of the piping joint of the heat pump type water heater which shows the 4th example of the present invention. The perspective view of the piping joint of the heat pump type water heater which shows the 5th Example of this invention The perspective view of the piping joint of the heat pump type water heater which shows the 6th Example of this invention Structural drawing of a heat pump type water heater showing a seventh embodiment of the present invention Circuit diagram of conventional heat pump water heater Structure of a conventional heat pump water heater

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Water-refrigerant heat exchanger 3 Pressure reducing valve 4 Air-refrigerant heat exchanger 5 Blower 6 Hot water storage tank 7 Mixing valve 8 Solenoid valve 9 Circulating pump for hot water supply 10 Circulating pump for bath preparation

Claims (6)

A refrigeration cycle configured by filling a refrigerant into a refrigerant circuit in which a compressor, a water-refrigerant heat exchanger, a pressure reducing valve, and an air-refrigerant heat exchanger are connected in an annular shape; and a first hot water storage tank, A heat pump type hot water heater having a water circuit and a tank configured by connecting two hot water storage tanks, wherein the heat pump type hot water heater includes the first unit in which the refrigeration cycle and the first hot water storage tank are disposed; A heat pump type hot water heater comprising two units of a second unit provided with a second hot water storage tank. The heat pump type water heater according to claim 1, wherein a pressure relief valve and a drain valve are disposed in the second unit. The heat pump type hot water heater according to claim 1 or 2, wherein a pipe is connected intermediately on a front surface of the first unit or the second unit. A pipe connection port mounting plate is disposed on the front surface of the first unit or the second unit, and a pipe connection port is further disposed on the pipe connection port mounting plate to connect the pipes. The heat pump type water heater according to claim 1 or 2. The heat pump type hot water heater according to any one of claims 1 to 4, wherein a total volume of the first hot water storage tank and the second hot water storage tank is changed from 100L to 200L. The heat pump type hot water heater according to any one of claims 1 to 5, wherein CO2 is filled in the refrigeration cycle.

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