JP2009121791A - Heat pump water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat pump water heater capable of making a device compact without reducing a content of a hot water storage tank. <P>SOLUTION: This heat pump water heater includes: a heat pump circuit constituted by circularly connecting a compressor 1, a water-coolant heat exchanger 2 and an air-coolant heat exchanger 4; a main hot water storage tank 6-a connected with the water-coolant heat exchanger 4 and having a roughly circular cross section; and an air distribution fan 5 for distributing the air to the air-coolant heat exchanger 4. A sub-hot water storage tank 6-b of a capacity smaller than that of the main hot water storage tank 6-a is disposed at a corner portion formed by a partitioning member 101-b sectioning the main hot water storage tank 6-a and the air distribution fan 5, and a front plate 101-d or a back plate 101-a of an external facing member of the main hot water storage tank 6-a near the main hot water storage tank 6-a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a refrigeration cycle and a heat pump water heater equipped with a hot water storage tank and a water circuit.

  As a conventional integrated heat pump water heater, there is an integrated heat pump water heater constituted by a heat pump circuit having a refrigeration cycle and a tank circuit having a hot water storage tank.

  Below, the conventional integrated heat pump water heater is demonstrated. FIG. 5 is an external view of the conventional integrated heat pump water heater, and FIG. 6 is a circuit configuration diagram of the conventional heat pump water heater.

As shown in FIGS. 5 and 6, the conventional integrated heat pump type hot water heater has a refrigeration cycle including a compressor 1, a water-refrigerant heat exchanger 2, a throttle valve 3, an air-refrigerant heat exchanger 4, and the like. The heat pump circuit, the hot water storage tank 6, the mixing valves 7-a and 7-b, the electromagnetic valve 8, the hot water circulation pump 9, the pressure reducing valve 10, the three-way valve 11, the relief valve 12, and the drain valve 13 The hot water is generated by a refrigeration cycle and stored in a hot water storage tank, and the hot water is supplied to a faucet or a bathtub.
JP 2005-164158 A

  However, the above-described conventional integrated heat pump water heater is smaller and has a better installation property than the night heat storage type separated heat pump water heater, but has a small tank volume and an increased use ratio of daytime power. There was a problem that the electricity bill was high.

  In order to solve the problem, it is necessary to reduce the size of the hot water storage tank and increase the heating capacity of the heat pump unit in order to reduce the tank unit while ensuring the hot water resistance. There was a problem that running cost was higher than night electricity. Further, when the heating capacity of the heat pump unit is increased, it is necessary to increase the power consumption and increase the current capacity, and there is a problem that the workability is deteriorated due to an increase in the contract power consumption and electric work.

  This invention solves such a conventional subject, and it aims at providing the heat pump water heater which implement | achieves size reduction of an apparatus, without reducing the volume of a hot water storage tank.

    In order to solve the conventional problems, a heat pump water heater of the present invention includes a compressor, a water-refrigerant heat exchanger, a decompression unit, and a heat pump circuit formed by connecting an air-refrigerant heat exchanger in an annular shape, A partition member that is connected to the water-refrigerant heat exchanger and has a substantially circular cross section and a blower fan that blows air to the air-refrigerant heat exchanger, and partitions the main hot water tank and the blower fan And a sub hot water storage tank having a smaller capacity than the main hot water storage tank is disposed at a corner formed by the front plate or the rear plate of the exterior member of the main hot water storage tank and in the vicinity of the main hot water storage tank. Therefore, it is possible to reduce the size of the tank unit in the same tank volume and to improve the installation property of the tank unit.

  ADVANTAGE OF THE INVENTION According to this invention, the heat pump water heater which implement | achieves size reduction of an apparatus can be provided, without reducing the volume of a hot water storage tank.

  The first invention includes a heat pump circuit formed by annularly connecting a compressor, a water-refrigerant heat exchanger, a decompression means, and an air-refrigerant heat exchanger, and a cross section connected to the water-refrigerant heat exchanger. A substantially circular main hot water storage tank and a blower fan for blowing air to the air-refrigerant heat exchanger, a partition member that partitions the main hot water storage tank and the blower fan, and a front plate of an exterior member of the main hot water storage tank or A sub hot water storage tank having a smaller capacity than the main hot water storage tank is disposed at a corner formed by the rear plate and in the vicinity of the main hot water storage tank. It is possible to reduce the size and improve the installation property of the tank unit.

  2nd invention is equipped with the piping connection part which connects piping, such as a main hot water storage tank, water supply, hot water, and a bath, and the said piping connection part is the front of the partition member and exterior member by which the sub hot water storage tank is not arrange | positioned. It is arranged at the corner formed by the plate or the rear plate, or at the corner formed by the side plate of the exterior member and the front plate or the rear plate of the exterior member. As a result, it is possible to reduce the size of the device body and improve the installation.

  The third aspect of the present invention is characterized in that the cross-sectional shape of the sub hot water storage tank is substantially circular, and the pressure resistance of the sub hot water storage tank can be improved and can be manufactured at low cost. In addition, the tank volume per volume of the device main body can be increased, the tank unit can be reduced in size, and the installability can be improved.

  The fourth aspect of the invention is characterized in that the cross-sectional shape of the sub-hot water storage tank is substantially rectangular, which can increase the filling efficiency of the tank rather than making it substantially cylindrical, and reduce the size of the equipment body. It is possible to improve the installability.

  The fifth invention is characterized in that the sub hot water storage tank is disposed while maintaining a substantially constant equidistant distance from the shape of the corner formed by the partition plate and the front plate or the rear plate of the exterior member of the main hot water storage tank. Therefore, the filling density of the tank can be increased as compared with a substantially circular or substantially rectangular shape, the device body can be further reduced in size, and the installation property can be improved.

  The sixth invention is characterized in that at least one of the main hot water storage tank and the sub hot water storage tank has a latent heat storage material, and the heat storage amount per unit volume of the tank can be increased from water, It is possible to reduce the size of the device main body and improve the installability.

  The seventh aspect of the invention is characterized in that the main hot water storage tank and the sub hot water storage tank are integrally insulated, which can efficiently insulate and reduce the size of the device body. Thus, it is possible to improve the installation property.

  The eighth invention is characterized in that the heat pump circuit is filled with carbon dioxide, and the global warming coefficient can be reduced with respect to conventional chlorofluorocarbons such as R410A, and the hot water storage tank is made small and downsized. It is possible to 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 plan sectional view of an integrated heat pump water heater according to the first embodiment of the present invention, and FIG. 2 is a circuit configuration diagram of the heat pump water heater.

  The integrated heat pump water heater in the first embodiment shown in FIGS. 1 and 2 includes a compressor 1, a water-refrigerant heat exchanger 2, a throttle valve 3, an air-refrigerant heat exchanger 4 and the like connected in a ring shape. A heat pump circuit unit configured by charging a refrigerant is disposed on the left side of the main body, and the main hot water storage tank 6-a, brother 1 sub hot water storage tank 6-b, and second sub hot water storage tank 6- 6 having a substantially circular cross section. c, mixing valve 7-a, 7-b, solenoid valve 8, circulation pump 9, pressure reducing valve 10, three-way valve 11, relief valve 12, and drain valve 13 are connected to each other by piping. Arranged on the right side.

  As shown in FIG. 1, the tank circuit section is partitioned by a main hot water storage tank 6-a, a rear plate 101-a of the main body, a partition member 101-b of the heat pump circuit, and a right side plate 101-c of the main body. Sub-hot water storage tanks 6-b and 6-c having a smaller volume and a circular cross section than the cylindrical main hot water storage tank 6-a are disposed in the space, and are connected in parallel to the main hot water storage tank 6-a. I'm.

  Further, the main hot water storage tank 6-a is thermally insulated by the heat insulating material 20-a, and the sub hot water storage tanks 6-b and 6-c are thermally insulated by the heat insulating materials 20-b and 20-c, respectively.

  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.

  The operation of the heat pump water heater configured as described above will be described below with reference to FIGS.

  First, the case where hot water is stored in the hot water storage tank 6 (hot water storage operation) will be described.

  A thermistor (not shown) or the like detects the amount of remaining hot water in the hot water storage tanks 6-a, b, c, and when the remaining hot water amount decreases, the compressor 1, the blower 5 and the hot water supply circulation pump 9 are operated to start the hot water storage operation. To do. 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 throttle valve 3, expands, and in the 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 hot water is stored from the upper part of the main hot water storage tank 6-a via the three-way valve 11 switched to the hot water storage side. The hot water is also stored in the sub-hot water storage tanks 6-b and 6-c connected to.

  Next, the case of hot water supply (outflow) will be described.

  When the faucet 14 is opened, the water pressure in the tank / water circuit decreases and water flows from the lower part of the main hot water storage tank 6-a and the sub hot water storage tanks 6-b and 6-c, and from the upper part of the main hot water storage tank 6-a. Hot water is pushed out, mixed with water by the mixing valve 7-a to reach the target temperature, and discharged from the faucet 14. Here, when the amount of remaining hot water in the hot water storage tanks 6-a, 6-b, 6-c decreases, the hot water storage operation is started by operating the compressor 1 and the blower 5 in parallel with the hot water supply. And if the faucet 14 is closed, the compressor 1 etc. will be stopped and hot water supply operation will be complete | finished.

  Next, the case of bath pouring (bath pouring operation) will be described.

When a bath pouring switch (not shown) on the remote controller is pressed, the solenoid valve 8 is opened, and the water pressure in the tank / water circuit is lowered in the same manner as in the hot water supply operation, so that the hot water storage tanks 6-a, 6-b, 6- Water flows in from the lower part of c, hot water is pushed out from the upper part of the hot water storage tank 6-a, mixed with water by the mixing valve 7-b to reach the target temperature, and poured from the bath 15. Here, when the amount of remaining hot water decreases, the hot water storage operation is started by operating the compressor 1 and the blower 5 in parallel with the bath pouring. When the bath 15 has been filled with a certain amount of hot water, the solenoid valve 8 is closed, the compressor 1 and the like are stopped, and the bath pouring operation is terminated.

  As described above, in the embodiment of the present embodiment, the sub-hot water having a capacity smaller than that of the substantially cylindrical main hot water storage tank and having a substantially circular cross section is provided in the two spaces behind the main hot water storage tank having a substantially circular cross section. By adopting the configuration in which the tank is provided, the sub hot water storage tank can be manufactured at a relatively low cost, and the increase in the price of the main body can be reduced. Moreover, the tank volume (filling density) per volume of the tank circuit unit can be increased, the tank circuit unit can be downsized, the main body can be downsized, and the installation of the main body can be improved. it can.

  In the present embodiment, a sub hot water storage tank having a capacity smaller than that of the substantially cylindrical main hot water storage tank and having a substantially circular cross section is provided in two spaces behind the main hot water storage tank having a substantially circular cross section. However, sub-tanks may be provided in two spaces in front of the main hot water storage tank.

(Embodiment 2)
FIG. 3 is a plan sectional view of an integrated heat pump water heater in the second embodiment of the present invention.

  The integrated heat pump water heater in the second embodiment of the present invention is only partially different in configuration from the first embodiment, and only the different points will be described. To do.

  As shown in FIG. 3, the difference from the first embodiment is that the shape of the sub hot water storage tanks 60-b, 60-c is the partition member 101-b between the main hot water storage tank 6-a and the heat pump circuit, the main body. The right side plate 101-c and the rear plate 101-a of the main body are configured so as to roughly match the shape of the two spaces behind the main hot water storage tank 6-a. Further, a heat insulating material 20-d is integrally wound around the main hot water storage tank 6-a and the sub hot water storage tanks 60-b, 60-c.

  As described above, in the embodiment of the present embodiment, the sub hot water storage tank has the above-described configuration, so that the tank filling efficiency can be improved as compared with a substantially cylindrical shape or a substantially rectangular parallelepiped. As a result, the water heater main body can be further miniaturized and the installation can be improved.

  In the above description, the sub hot water storage tank is disposed behind the main hot water storage tank and the pipe connection portion is disposed on the front surface. However, as shown in FIG. 4, the sub hot water storage tank is on the left side of the main hot water storage tank and the pipe connection portion is on the right side. You may arrange in.

  Further, when the sub hot water storage tank is filled with the latent heat storage material, the tank filling efficiency can be further improved, and the tank circuit can be downsized and the main body can be downsized.

  In the above description, the integrated water heater is used. However, the heat pump circuit unit and the tank circuit unit may be separable.

  As described above, the present invention is applied to an integrated heat pump water heater that generates hot water in a heat pump cycle and supplies hot water, and is suitable for, for example, a domestic water heater or a commercial water heater.

Cross-sectional view of integrated heat pump water heater in Embodiment 1 of the present invention The circuit block diagram of the integrated heat pump water heater in Embodiment 1 of this invention Cross-sectional view of an integrated heat pump water heater in Embodiment 2 of the present invention Cross-sectional view of an integrated heat pump water heater in another embodiment of the present invention (A) Schematic top view of a conventional integrated heat pump water heater (b) Schematic perspective view of a conventional integrated heat pump water heater Circuit diagram of a conventional integrated heat pump water heater

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Water-refrigerant heat exchanger 3 Throttle valve 4 Air-refrigerant heat exchanger 5 Blower 6 Hot water storage tank 7 Mixing valve 8 Solenoid valve 9 Hot water circulation pump 10 Pressure reducing valve 11 Three-way valve 12 Relief valve 13 Drain valve
14 Faucet 15 Bathtub 20 Thermal insulation

Claims (8)

A heat pump circuit formed by annularly connecting a compressor, a water-refrigerant heat exchanger, a decompression means, and an air-refrigerant heat exchanger, and a main hot water storage tank connected to the water-refrigerant heat exchanger and having a substantially circular cross section And a blower fan that blows air to the air-refrigerant heat exchanger, and a partition member that partitions the main hot water storage tank and the blower fan and a front plate or a rear plate of an exterior member of the main hot water storage tank are formed. A heat pump water heater, wherein a sub hot water storage tank having a smaller capacity than the main hot water storage tank is disposed at a corner and in the vicinity of the main hot water storage tank. A pipe connecting part for connecting a main hot water storage tank and pipes for water supply, hot water, bath, etc. is provided, and the pipe connecting part is provided with a partition member and a front plate or a rear plate of an exterior member in which a sub hot water storage tank is not disposed. 2. The heat pump water heater according to claim 1, wherein the heat pump water heater is disposed at a corner to be formed or at a corner formed by a side plate of the exterior member and a front plate or a rear plate of the exterior member. The heat pump water heater according to claim 1 or 2, wherein the sub hot water storage tank has a substantially circular cross-sectional shape. The heat pump water heater according to claim 1 or 2, wherein the sub hot water storage tank has a substantially square cross-sectional shape. The sub hot water storage tank is disposed while maintaining a substantially constant equidistant distance from the shape of the corner formed by the partition plate and the front plate or the rear plate of the exterior member of the main hot water storage tank. The heat pump water heater according to any one of 4. The heat pump water heater according to any one of claims 1 to 5, wherein at least one of the main hot water storage tank and the sub hot water storage tank has a latent heat storage material. The heat pump water heater according to any one of claims 1 to 6, wherein the main hot water storage tank and the sub hot water storage tank are integrally insulated. The heat pump water heater according to any one of claims 1 to 7, wherein the heat pump circuit is filled with carbon dioxide.

Images