JP2006349199A - Heat pump water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve storing performance of components and to realize miniaturization of a housing in an integral-type heat pump water heater. <P>SOLUTION: In this integral-type heat pump water heater comprising a refrigerating cycle formed by filling a refrigerant circuit constituted by circularly connecting a compressor 1, a water-refrigerant heat exchanger 2, a pressure reducing means 3 and an air-refrigerant heat exchanger 4, with the refrigerant, and a tank/water circuit having two approximately cylindrical hot water storage tanks 6a, 6b, a rear housing opposite to at least a part of two approximately cylindrical hot water storage tanks 6a, 6b is projected backward, and the hot water storing tanks 6a, 6b are divided into two, thus a diameter of each hot water storage tank can be reduced, and a depth of the housing can be reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an integrated heat pump water heater provided with a refrigeration cycle, a hot water storage tank, and a water circuit in one housing.

  As a conventional integrated heat pump water heater, an instantaneous heat pump water heater having a refrigeration cycle and a tank / water circuit has been commercialized.

  FIG. 6 is a circuit configuration diagram of a conventional integrated heat pump water heater. The integrated heat pump water heater shown in FIG. 6 includes a compressor (1, 21), a water-refrigerant heat exchanger (2, 22), a pressure reducing valve (3, 23), and an air-refrigerant heat exchanger (4, 24). And two refrigeration cycles composed of an air blower (5, 25), etc., and a hot water storage tank 6, a mixing valve 7, a flow rate adjusting valve 8, a hot water circulation pump 9 and a bath recirculation pump 10 are connected by piping. The tank / water circuit is configured to generate hot water in the refrigeration cycle and supply hot water directly to the bathtub 11 and the faucet 12 or hot water from the hot water storage tank.

As shown in FIG. 7, this integrated heat pump water heater is configured as an integrated type in which all of the refrigeration cycle and the tank / water circuit are housed in one unit. Compressor (1, 21), pressure reducing valve (3, 23), blower (4, 24), mixing valve 7 of the tank circuit, flow rate adjusting valve 8, circulating pump 9 for hot water supply, circulating pump for reheating bath, etc. The control device is disposed on the front surface of the hot water storage tank 6 (see, for example, Non-Patent Document 1).
Weekly air conditioner distributor May 15, 2003 issue (VOL.24-No.896)

  However, the above-described conventional integrated heat pump water heater is configured as an integrated type in which the refrigeration cycle and the tank / water circuit are all housed in a single casing, and further downsizing is required. In particular, when the depth of the casing is reduced, the storage space on the front surface of the hot water storage tank is reduced, and there is a problem that it is impossible to store the control device, the water pipe, and the like.

  Therefore, the present invention solves such a conventional problem, and an object of the present invention is to improve the storage of parts and to reduce the size of a housing in an integrated heat pump water heater.

  In order to solve the above problems, the present invention includes a refrigeration cycle formed by filling a refrigerant into a refrigerant circuit in which a compressor, a water-refrigerant heat exchanger, a decompression unit, and an air-refrigerant heat exchanger are connected in an annular shape, An integrated heat pump water heater having a tank / water circuit having two substantially cylindrical hot water storage tanks, and projecting a rear housing facing at least a part of the two substantially cylindrical hot water storage tanks to the rear It is set as the structure to be made.

  In order to solve the above problems, the present invention includes a refrigeration cycle formed by filling a refrigerant into a refrigerant circuit in which a compressor, a water-refrigerant heat exchanger, a decompression unit, and an air-refrigerant heat exchanger are connected in an annular shape, An integrated heat pump water heater having a tank / water circuit having a substantially elliptical hot water storage tank, wherein a rear housing facing at least a part of the substantially elliptical hot water storage tank projects backward. Is.

  In order to solve the above problems, the present invention includes a refrigeration cycle formed by filling a refrigerant into a refrigerant circuit in which a compressor, a water-refrigerant heat exchanger, a decompression unit, and an air-refrigerant heat exchanger are connected in an annular shape, An integrated heat pump water heater having a tank / water circuit having a substantially square hot water storage tank, wherein a rear housing facing at least a part of the substantially square hot water storage tank projects backward. is there.

  ADVANTAGE OF THE INVENTION According to this invention, the integrated heat pump water heater which implement | achieved the storage property improvement of components and size reduction of a housing | casing can be provided.

  The first invention includes a refrigeration cycle formed by filling a refrigerant into a refrigerant circuit in which a compressor, a water-refrigerant heat exchanger, a decompression means, and an air-refrigerant heat exchanger are connected in an annular shape, and two substantially cylindrical shapes An integrated heat pump water heater having a tank / water circuit having a hot water storage tank, wherein a rear housing facing at least a part of the two substantially cylindrical hot water storage tanks protrudes rearward By dividing the hot water storage tank into two, the diameter of the hot water storage tank per one can be reduced, and the depth of the housing can be reduced.

  In addition, by projecting part of the two approximately cylindrical hot water storage tanks to the rear part of the housing, it is possible to gain space in front of the hot water storage tank, and improve the refrigeration cycle and tank / water circuit parts storage capacity. As a result, it is possible to further reduce the size of the housing, particularly reduce the depth.

  A second invention includes a refrigeration cycle formed by filling a refrigerant into a refrigerant circuit in which a compressor, a water-refrigerant heat exchanger, a decompression means, and an air-refrigerant heat exchanger are connected in an annular shape, and a substantially elliptical hot water storage An integrated heat pump water heater having a tank / water circuit having a tank, wherein a rear housing facing at least a part of the substantially elliptical hot water storage tank is projected rearward. By making the tank substantially elliptical, the depth of the housing can be reduced.

  In addition, by projecting a part of the approximately elliptical hot water storage tank to the rear of the housing, it is possible to earn space in front of the hot water storage tank, improving the refrigeration cycle and tank / water circuit parts storage, As a result, it is possible to further reduce the size of the housing, particularly reduce the depth.

  According to a third aspect of the present invention, there is provided a refrigeration cycle formed by charging a refrigerant into a refrigerant circuit in which a compressor, a water-refrigerant heat exchanger, a decompression means, and an air-refrigerant heat exchanger are connected in an annular shape, and a substantially square hot water storage tank An integrated heat pump water heater having a tank / water circuit having a structure in which a rear housing facing at least a part of the substantially square hot water storage tank protrudes rearward. By making it square, the length of one side of the square tank can be reduced per the same volume, and the depth of the housing can be reduced.

  In addition, by projecting a part of the approximately square hot water storage tank to the rear part of the housing, the space in front of the hot water storage tank can be gained, the refrigeration cycle and the tank / water circuit parts can be stored better, and the housing It is possible to further reduce the size of the body, especially the depth.

  4th invention is what filled the carbon dioxide with the refrigerant | coolant cycle in the refrigerating cycle of the heat pump water heater, can reduce a global warming coefficient with respect to CFCs, such as conventional R410A, and can provide an environmentally friendly heat pump water heater. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a circuit configuration diagram of an integrated heat pump water heater in an embodiment of the present invention, FIG. 2 (a) is a front view seen through the inside of the identical heat pump water heater, and FIG. 2 (b) is an identical heat pump. It is a top view of a water heater.

  In the integrated heat pump water heater in the first embodiment shown in the figure, the refrigerant is supplied to the refrigerant circuit in which the compressor 1, the water-refrigerant heat exchanger 2, the pressure reducing valve 3, and the air-refrigerant heat exchanger 4 are connected in an annular shape. It has a refrigeration cycle that is filled. Further, a tank / water circuit is provided in which a hot water storage tank 6, a mixing valve 7, a flow rate adjusting valve 8, a hot water supply circulation pump 9, a bath recirculation pump 10 and the like are connected by piping. The blower 5 functions to send air to the air-refrigerant heat exchanger 4, the water-refrigerant heat exchanger 2 functions as a condenser, and the air-refrigerant heat exchanger 4 functions as an evaporator.

  As shown in FIGS. 2 (a) and 2 (b), the integrated heat pump water heater of the present embodiment accommodates the refrigeration cycle and the tank / water circuit in one unit 101, and is substantially cylindrical. A part of the hot water storage tank 6 is configured to protrude rearward of the unit 101.

  The operation of the integrated heat pump water heater will be described. First, when water is supplied, the faucet 12 is opened, the compressor 1 and the hot water supply circulation pump 9 are operated, and hot water supply is started. In the refrigeration cycle, the refrigerant compressed by the compressor 1 dissipates heat and condenses in the water-refrigerant heat exchanger 2, flows into the pressure reducing valve 3, expands, and in the air blower 5 in the air-refrigerant heat exchanger 4. It exchanges heat with the sent air and evaporates to become a gas refrigerant. This gas refrigerant is sucked into the compressor 1 and compressed again. In the tank circuit, water is heated by the water-refrigerant heat exchanger 2 to generate hot water, and this hot water is supplied from the faucet 12 through the mixing valve 7 and the electromagnetic valve 8 switched to the hot water supply side. And the faucet 12 is closed, the compressor 1 etc. are stopped, and direct hot water supply is complete | finished.

  On the other hand, when hot water is stored in the substantially cylindrical hot water storage tank 6, the refrigeration cycle and the hot water supply circulation pump 9 are operated, and water is heated by the water-refrigerant heat exchanger 2 as in the case of the direct hot water supply. Hot water is generated, and the hot water is stored in the hot water storage tank 6 through the mixing valve 7 switched to the hot water storage side. When the hot water in the hot water storage tank 6 is discharged, the refrigeration cycle and the hot water supply circulation pump 9 are stopped, the mixing valve 7 is switched, and the hot water in the hot water storage tank 6 is discharged from the tap 12. 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 reheating the bath, the refrigeration cycle and the recirculation pump 10 for reheating the bath are operated, and the water sent from the recirculation pump 10 for reheating the bath is heated by the water-refrigerant heat exchanger 2. Hot water is generated, and this hot water is supplied to the bathtub 11 for additional cooking. Further, the substantially cylindrical hot water storage tank 6 has a structure in which a part of the tank protrudes rearward of the main body 101.

  According to the integrated heat pump water heater of the present embodiment as described above, a space in front of the hot water storage tank 6 can be gained by projecting a part of the substantially cylindrical hot water storage tank to the rear part of the main body 101. In addition, it is possible to improve the storability of refrigeration cycle and tank / water circuit components, and to reduce the size of the housing, especially the depth. Here, in order to prevent the air-refrigerant heat exchanger 4 from obstructing the air flow behind the main body 101, it is usually necessary to leave a gap with the wall of about 100 mm. -The ventilation path (the gap between the wall and the main body of 50 to 100 mm) to the refrigerant heat exchanger 4 can be used effectively, and the main body can be downsized without increasing the depth of the installation location.

FIG. 3 is a perspective plan view showing an integrated heat pump water heater according to another embodiment.
This integrated heat pump water heater shown in the figure is configured by filling a refrigerant into a refrigerant circuit in which a compressor 1, a water-refrigerant heat exchanger 2, a pressure reducing valve 3, and an air-refrigerant heat exchanger 4 are connected in an annular shape. Has a refrigeration cycle. In addition, it has a tank / water circuit constituted by connecting two hot water storage tanks 6a and 6b, a mixing valve 7, a flow rate adjusting valve 8, a hot water supply circulation pump 9, a bath recirculation pump 10 and the like by piping. ing. The blower 5 functions to send air to the air-refrigerant heat exchanger 4, the water-refrigerant heat exchanger 2 functions as a condenser, and the air-refrigerant heat exchanger 4 functions as an evaporator.

  As shown in FIG. 3, the integrated heat pump water heater of the present embodiment stores the refrigeration cycle and the tank / water circuit in one unit 101, and includes two substantially cylindrical hot water storage tanks 6a and 6b. A part of the unit 101 protrudes backward. In addition, operation | movement of the heat pump water heater of this embodiment is the same as the said embodiment, The description is abbreviate | omitted.

  According to the integrated heat pump water heater of the present embodiment as described above, by dividing the hot water storage tank into two, the diameter of the hot water storage tank per one can be reduced, and the depth of the housing can be reduced. . In addition, by projecting part of the two approximately cylindrical hot water storage tanks to the rear part of the housing, it is possible to gain space in front of the hot water storage tank, and improve the refrigeration cycle and tank / water circuit parts storage capacity. As a result, it is possible to further reduce the size of the housing, particularly reduce the depth.

  FIG. 4 is a plan perspective view showing an integrated heat pump water heater in another embodiment.

  The integrated heat pump water heater in this embodiment shown in the figure fills a refrigerant in a refrigerant circuit in which a compressor 1, a water-refrigerant heat exchanger 2, a pressure reducing valve 3, and an air-refrigerant heat exchanger 4 are connected in an annular shape. The refrigeration cycle is configured as described above. In addition, a substantially elliptical hot water storage tank 6c, a mixing valve 7, a flow rate adjusting valve 8, a hot water supply circulation pump 9, a bath recirculation pump 10 and the like are connected to each other by piping. Yes. The blower 5 functions to send air to the air-refrigerant heat exchanger 4, the water-refrigerant heat exchanger 2 functions as a condenser, and the air-refrigerant heat exchanger 4 functions as an evaporator.

  As shown in FIG. 4, this integrated heat pump water heater stores the refrigeration cycle and the tank / water circuit in one unit 101, and a part of the substantially elliptical hot water storage tank 6 c is placed behind the unit 101. It is made to project to

  In addition, operation | movement of the heat pump water heater of this embodiment is the same as the said embodiment, The description is abbreviate | omitted.

  According to the integrated heat pump water heater of the present embodiment as described above, the depth of the housing can be reduced by making the hot water storage tank into a substantially elliptical shape. In addition, by projecting a part of the approximately elliptical hot water storage tank to the rear of the housing, the front space of the hot water storage tank can be gained, and the refrigeration cycle and tank / water circuit parts can be stored more easily. It is possible to further reduce the size of the housing, particularly reduce the depth.

  FIG. 5 is a plan perspective view showing an integrated heat pump water heater in another embodiment of the present invention.

The integrated heat pump water heater in this embodiment shown in the figure fills a refrigerant in a refrigerant circuit in which a compressor 1, a water-refrigerant heat exchanger 2, a pressure reducing valve 3, and an air-refrigerant heat exchanger 4 are connected in an annular shape. The refrigeration cycle is configured as described above. In addition, a substantially square hot water storage tank 6d, a mixing valve 7, a flow rate adjusting valve 8, a hot water supply circulation pump 9, a bath recirculation pump 10 and the like are connected to each other by piping. . The blower 5 is an air-refrigerant heat exchanger 4.
The water-refrigerant heat exchanger 2 functions as a condenser, and the air-refrigerant heat exchanger 4 functions as an evaporator.

  As shown in FIG. 5, the integrated heat pump water heater of the present embodiment stores the refrigeration cycle and the tank / water circuit in one unit 101, and a part of the substantially square hot water storage tank 6d 101 is configured to protrude rearward.

  In addition, operation | movement of the heat pump water heater of this embodiment is the same as the said embodiment, The description is abbreviate | omitted.

  According to the integrated heat pump water heater of the present embodiment as described above, by making the hot water storage tank into a substantially square shape, the length of one side of the rectangular tank can be reduced per the same volume, and the depth of the housing is reduced. it can. In addition, by projecting a part of the substantially square hot water storage tank to the rear of the housing, the space in front of the hot water storage tank can be gained, and the refrigeration cycle and the tank / water circuit parts can be stored more easily. It is possible to further reduce the size of the body, especially the depth.

  The integrated heat pump water heater in the present invention is a refrigeration cycle filled with carbon dioxide. According to the integrated heat pump water heater of the present embodiment as described above, it is possible to provide a heat pump hot water heater that can reduce the global warming coefficient with respect to conventional chlorofluorocarbons such as R410A and is friendly to the global environment.

  As described above, the present invention is particularly useful for an integrated heat pump water heater because it can improve the storage of components and reduce the size of the housing.

The circuit block diagram of the integrated heat pump water heater which shows the 1st Embodiment of this invention (A) Front view of integrated heat pump water heater shown in FIG. 1 (b) Plan view of integrated heat pump water heater shown in FIG. The top view of the integrated heat pump water heater which shows other embodiment of this invention. The top view of the integrated heat pump water heater which shows other embodiment of this invention. The top view of the integrated heat pump water heater which shows other embodiment of this invention. Circuit diagram of a conventional integrated 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

Claims (4)

Compressor, water-refrigerant heat exchanger, decompression means, refrigeration cycle formed by filling a refrigerant circuit with an annularly connected air-refrigerant heat exchanger, and a tank having two substantially cylindrical hot water storage tanks / An integrated heat pump water heater comprising a water circuit, wherein the rear housing facing at least a part of the two substantially cylindrical hot water storage tanks protrudes rearward. Refrigeration cycle formed by filling a refrigerant into a refrigerant circuit in which a compressor, a water-refrigerant heat exchanger, a decompression means, and an air-refrigerant heat exchanger are connected in an annular shape, and a tank / water having a substantially elliptical hot water storage tank An integrated heat pump water heater having a circuit, wherein a rear housing facing at least a part of the substantially elliptical hot water storage tank projects rearward. Compressor, water-refrigerant heat exchanger, decompression means, refrigeration cycle formed by filling refrigerant into a refrigerant circuit in which an air-refrigerant heat exchanger is connected in an annular shape, and a tank / water circuit having a substantially square hot water storage tank An integrated heat pump water heater having a configuration in which a rear housing facing at least a part of the substantially square hot water storage tank is protruded rearward. The integrated heat pump type hot water heater according to any one of claims 1 to 3, wherein carbon dioxide is filled as a refrigerant.

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