JP2006292243A - Heat pump water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat pump water heater capable of reducing noise and improving usability in an integrated heat pump water heater including a refrigerant cycle and a hot water supply cycle provided in one body unit. <P>SOLUTION: This heat pump water heater comprises a compressor 5, an air-refrigerant heat exchanger 14, a water-refrigerant heat exchanger performing heat exchange with a radiator 6, a hot water storage tank 19 connected to the heat exchanger 18 and storing hot water heated by the heat exchanger 18; a base plate 4 for placing the compressor 5 and the hot water storage tank 19; an intermediate base plate arranged with a clearance from the base plate 4; and a substantially L-shaped intermediate base plate support plate 9 supporting the intermediate base plate 8. The heat exchanger 14 is placed on the intermediate base plate 8, the compressor 5 is arranged inside and in front of the support plate 9, and a sound-insulating material 13 is provided on the surface opposed to the compressor 5 of the support plate 8. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heat pump type water heater.

  Conventionally, hot water heaters that use gas or petroleum as fuel and heat tap water with the combustion heat have been used as hot water heaters. While these have the advantage of being excellent in quick hot water properties, fuels such as gas and oil are necessary and the supply thereof is indispensable, exhaust gas after combustion is released into the atmosphere, causing air pollution, and burning Therefore, there were problems such as being always unsafe and having a loud noise during combustion. In particular, in all-electric houses and condominiums where all energy sources are electricity, which has been increasing in recent years, there is no way to supply fuel, so there are an increasing number of cases where it cannot be used.

  Accordingly, a hot water storage type heat pump type hot water heater equipped with a hot water storage tank has been developed. This solves the problem of hot water heaters due to combustion, and can be installed easily in all-electric homes and condominiums without the need for new infrastructure development. It is possible to ensure high thermal efficiency, and it is possible to store hot water in a hot water storage tank using cheap late-night power for operation, and the running cost is gradually reduced. Has become popular.

  As such a water heater, there is a heat pump type water heater shown in Patent Document 1, for example. As shown in FIG. 6, the heat pump type hot water heater includes a hot water supply cycle 71 and a refrigerant cycle 72, which are separate main body units. Two boxes of a hot water storage unit including a hot water supply cycle 71 and a heat pump unit including a refrigerant cycle 72 are provided. This hot water supply cycle 71 includes a hot water storage tank 75 having a hot water supply port 73 provided on the bottom wall and a hot water supply port 74 provided on the upper wall, a water heat exchange path 76, and a water circulation pump 77, and performs water heat exchange. A passage 76 and a water circulation pump 77 are provided in a circulation passage 80 that connects a water intake 78 and a hot water inlet 79 of the hot water storage tank 75.

  The refrigerant cycle 72 is configured by connecting a compressor 81, a water heat exchanger 82 constituting a heat exchange path 76, a pressure reducing mechanism 83, and an evaporator 84 as an air heat exchanger through a refrigerant path 85 in order. A refrigerant cycle is provided. Furthermore, the hot water supply cycle 71 and the refrigerant cycle 72 are connected by connecting pipes 86 and 87 disposed on the outdoor side. Then, the low-temperature water supplied from the water supply port 73 and discharged to the circulation path 78 by the water circulation pump 77 is boiled by the water heat exchanger 82 (that is, the water heat exchange path 76) and discharged from the hot water supply port 74. (For example, see Patent Document 1).

  The heat pump water heater operates an energy efficient refrigerant cycle (heat pump circuit) 72 using inexpensive electric power at night, and circulates water in the hot water storage tank 75 with a water flow pump 77 while performing water heat. The exchanger 82 is warmed up to a predetermined hot water temperature, detects that the predetermined hot water temperature has been reached, and stops the operation of the refrigerant cycle 72. When hot water is used at the normal hot water supply port 74, it is mixed with tap water having a temperature lower than the hot water temperature in the hot water storage tank 75 to obtain an appropriate temperature desired by the user. The temperature of the hot water stored in the hot water storage tank 75 should be as high as possible, thereby increasing the amount of tap water added to lower the temperature and reducing the amount of hot water removed from the hot water storage tank 75. It is designed to prevent problems such as cutting.

Among them, an apparatus in which a heat pump unit and a hot water storage unit are integrated has been devised. For example, there is a heat pump water heater shown below. In this case, a hot water supply cycle and a refrigerant cycle are stored in a single box, and a compressor, a radiator, a decompression means, and an evaporator are sequentially connected to form a closed circuit, and a refrigerant cycle for circulating the refrigerant, A tank, a water circulation pump for circulating water in the hot water storage tank, a water-refrigerant heat exchanger for exchanging heat with water circulated by the water circulation pump, a water supply pipe for supplying water to the hot water storage tank, and the hot water storage tank A hot water supply pipe for supplying hot water from the water supply pipe, the water supply pipe is branched and connected to the inlet side of the hot water storage tank and the inlet side of the water heat exchanger, and the hot water supply pipe is connected to the outlet side of the hot water storage tank and the water heat exchange. Branching and connecting to the outlet side of the water heater, provided with a valve for switching between hot water supply from the hot water storage tank and hot water supply from the water heat exchanger, water-refrigerant heat exchange comprising the water heat exchanger and the condenser Wrap the vessel in a spiral In addition, the refrigerant tank and the hot water supply cycle are stored in one box (see, for example, Patent Document 2 and Non-Patent Document 1).

  FIG. 7 shows a circuit configuration diagram of such a heat pump water heater.

  The heat pump water heater shown in FIG. 7 is configured as an integrated type in which all refrigerant cycles and hot water cycles are housed in one unit, and includes a refrigerant cycle 110, a hot water supply cycle 111, a water supply pipe 112, and a hot water supply pipe 113. The pipe 112 is branched and connected to the inlet side of the hot water storage tank 114 and the outlet side of the water-refrigerant heat exchanger 115 to switch between hot water supply from the hot water storage tank 114 and hot water supply from the water-refrigerant heat exchanger 115. 117, the water-refrigerant heat exchanger 115 is spirally wound into a cylindrical shape, and is installed so as to surround the hot water storage tank 114, and the refrigerant cycle 110 and the water circulation circuit 111 are accommodated in one box. It is.

  Then, a compressor 118, a water-refrigerant heat exchanger 115 as a radiator, a decompression unit 119, and an evaporator 120 are sequentially connected to the refrigerant cycle 110 to form a closed circuit.

  And what was commercialized based on the structure has what is shown in FIG. 8, and is comprised by the integrated type which accommodated the refrigerant | coolant cycle and the hot water supply cycle in one unit. A hot water storage tank 114 is provided on the right side of the main body, and a compressor 118 is mounted as a refrigerant cycle on the lower left side of the main body. A water-refrigerant heat exchanger 115 as a radiator is wound around the hot water storage tank 114. -Below the refrigerant | coolant heat exchanger 115, the bath additional cooking heat exchanger 121 similarly wound around the hot water storage tank 114 is provided.

Further, decompression means (not shown) is provided on the side of the compressor 118, and an evaporator 120 is provided around the compressor 118 to constitute the refrigerant cycle 110. A blower fan 122 is provided in front of the evaporator 120. A hot water supply cycle 111 is provided in front of the hot water storage tank 114, and is configured as an integrated heat pump water heater in which the refrigerant cycle and the hot water supply cycle are all housed in an integrated housing.
JP 2003-222392 A JP 2003-314892 A Weekly air conditioner distributor May 15, 2003 issue (VOL.24-No.896)

  However, in the configuration of Patent Document 1, since the hot water supply cycle and the refrigerant cycle are separated, each is necessary separately, and when each is unitized, the unit size is large and the weight is heavy. However, there was a problem that the installation location was limited. Further, since the connecting pipe is disposed outside the room, freeze waterproofing or the like is necessary, and there are problems in workability and cost.

  In addition, assuming that it is used by a family, the amount of hot water needs to be 370 L or more. Considering the case where hot water is stored to the full capacity of the hot water storage tank, the mass of the hot water storage unit and heat pump unit combined exceeds 420 kg. Therefore, it was necessary to secure sufficient strength by performing foundation work and reinforcement at the installation site. In particular, if it was to be installed on the balcony of a condominium, the load-bearing strength of the balcony had to be increased, and the construction cost of the apartment could be high. Furthermore, two units must be transported when transporting the heat pump water heater to the customer's installation location, which requires a lot of cost and labor. Further, since the connecting pipe is disposed outside the room, freeze waterproofing or the like is necessary, and there are problems in workability and cost.

  Furthermore, since the amount of hot water in the hot water storage tank is limited, the amount of hot water used may increase when many people gather, and the amount of hot water in the hot water storage tank may be lost. However, since it is a product that originally uses midnight power to store hot water over a long time with a small capacity, it takes a considerable amount of time to store hot water. There are problems in usability, such as the lack of merits of using late-night power and the cost of electricity.

  In addition, the heat pump water heater shown in Patent Document 2 and Non-Patent Document 1 is configured as an integrated type in which the refrigerant cycle 110 and the hot water supply cycle 111 are all housed in one unit, and the workability such as few pipe connections is provided. Although it was excellent, the compressor sound leaked to the outside and had a problem that the noise level was high. In particular, in the heat pump water heater of Non-Patent Document 1, since there are two compressors 118, the noise value is considerably excessive, especially when the amount of remaining hot water in the hot water storage tank 114 is reduced. For this reason, the compressor 118 is driven at a high rotational speed. However, when it is late at night, there is a problem that a large amount of sound is generated outside.

  Further, in the event of a refrigerant cycle failure or the like, even if an attempt is made to replace the main unit, the entire main unit must be transported, resulting in a great expense. In particular, when carbon dioxide gas is used as the refrigerant, the pressure of the refrigerant is used at a critical pressure or higher, so that the pressure is three times or more that of the R-410A refrigerant used in general air conditioners. Arise. Therefore, when repairs such as brazing of pipes are performed, it is indispensable to perform reliable leak inspection, and it is difficult to perform repairs at the site where they are being constructed. It is necessary. However, as described above, the fact that the integrated main body is large and heavy is a problem of maintenance.

  Further, as shown in FIG. 7, since the hot water supply / refrigerant heat exchanger is wound around the hot water storage tank in order to reduce the size of the main unit, the hot water supply water / refrigerant heat exchanger is replaced. Difficult to do was also an issue of maintainability. Of the refrigerant cycle, the compressor, decompression means, and evaporator are separated on the right side of the main body, and the radiator (water-refrigerant heat exchanger) is separated on the right side of the main body. In this case, there is a problem in that the heat efficiency is lowered due to heat dissipation loss.

  Therefore, the present invention solves such a conventional problem, and in an integrated heat pump water heater in which a refrigerant cycle and a hot water supply cycle are housed in one main body unit, the noise is reduced and the usability is improved. An object of the present invention is to provide a heat pump water heater having high usability, capable of improving capacity while achieving downsizing.

In order to solve the conventional problem, a heat pump water heater of the present invention includes a compressor, a radiator,
A decompression means and an air-refrigerant heat exchanger are sequentially connected to form a closed circuit, a refrigerant cycle for circulating the refrigerant, a water-refrigerant heat exchanger for exchanging heat with the radiator, and the water-refrigerant heat exchange A hot water supply cycle having a hot water storage tank that is connected to a heater and stores hot water heated by the water-refrigerant heat exchanger, the compressor, a substrate for mounting the hot water storage tank, and a gap between the substrate and the substrate. An intermediate base disposed, and a substantially L-shaped intermediate substrate support plate for supporting the intermediate base, the air-refrigerant heat exchanger being placed on the intermediate base, The compressor is disposed in front, and a soundproofing material is provided on a surface of the intermediate substrate support plate facing the compressor.

  According to the present invention, in an integrated heat pump water heater in which a refrigerant cycle and a hot water supply cycle are housed in one main body unit, the noise can be reduced and the usability can be improved. An improvement can be aimed at and the heat pump water heater with high usability can be provided.

  A first aspect of the present invention is a refrigerant cycle in which a compressor, a radiator, a pressure reducing means, and an air-refrigerant heat exchanger are sequentially connected to form a closed circuit and the refrigerant is circulated, and water that exchanges heat with the radiator. A refrigerant heat exchanger, a hot water supply cycle connected to the water-refrigerant heat exchanger and having a hot water storage tank for storing hot water heated by the water-refrigerant heat exchanger, and the compressor and the hot water storage tank are mounted. A substrate, a middle base provided with a gap with the board, and a substantially L-shaped middle board support plate for supporting the middle base, wherein the air-refrigerant heat exchanger is mounted on the middle base. The compressor is disposed inward and forward of the intermediate substrate support plate, and a soundproofing material is provided on a surface of the intermediate substrate support plate facing the compressor.

  This makes it possible to prevent the compressor drive sound from leaking to the outside when the compressor is driven when storing hot water or supplying hot water. be able to. Also, even if the compressor vibrates during driving and abuts against the intermediate board support plate, it is possible to prevent the generation of abnormal noise by the buffering action of the soundproof material, and the refrigerant cycle piping is Even if it swings and comes into contact with the intermediate substrate support plate, it is possible to prevent deformation of the pipe by a buffering effect by the soundproof material, and it is possible to provide a safe heat pump water heater without pipe breakage. Further, since the compressor is arranged in front of the intermediate substrate support plate, the compressor can be maintained from the front, and a heat pump water heater excellent in maintainability can be obtained.

  The second invention is characterized in that, in the heat pump water heater of the first invention, a water-refrigerant heat exchanger is arranged outside the intermediate substrate support plate. By sandwiching between the intermediate board support plate, the main unit housing, and the upper intermediate board, positioning becomes possible without incurring significant costs, and it is sufficiently strong even when an impact is applied during transfer. It can be a heat pump water heater that is strong against heat.

  In addition, the water-refrigerant heat exchanger arranged on the outer side of the intermediate substrate support plate is partitioned from the compressor arranged on the inner side and in the front, and the water-refrigerant heat exchanger leaks by any chance. Even if it does, it can prevent the accumulation of the water on a compressor, can prevent generation | occurrence | production of an electric leakage, etc., and can be set as a safe heat pump water heater. In addition, there is an intermediate board support plate with soundproofing material on the outside of the compressor, a water-refrigerant heat exchanger on the outside, and a housing on the outside. A heat pump water heater that prevents sound leakage to the outside of the machine and achieves low noise can be obtained.

According to a third aspect of the present invention, in the heat pump water heater of the first or second aspect of the present invention, the heat pump water heater includes a casing exterior provided with a gap provided between the intermediate substrate support plate and the intermediate casing support plate between the casing exterior and the compressor. A board support plate is arranged, and an intermediate board support plate is provided on the outer side of the compressor, and a casing exterior is provided on the outer side through a gap. The generated noise is surrounded by the intermediate substrate support plate and the housing exterior, and the heat pump water heater that can prevent the drive sound of the compressor from leaking to the outside and realizes low noise. can do.

  According to a fourth aspect of the present invention, in the heat pump water heater of any one of the first to third aspects, a compressor cover that covers the compressor is provided above the intermediate substrate, and the top portion of the compressor cover protrudes from the intermediate substrate. It is possible to arrange the compressor even if the height of the compressor is higher than the lower part of the air-refrigerant heat exchanger, and the height of the air-refrigerant heat exchanger is set as much as possible within the space. It becomes possible to make it high, and the improvement of a heating capability can be aimed at. As a result, the efficiency of the device can be improved. As a result, the heat pump performance can be improved, the COP can be improved, the running cost can be reduced by the electricity bill, and the load on the global environment can be reduced.

  According to a fifth aspect of the present invention, in the heat pump water heater of the fourth aspect of the invention, a soundproof material is provided on the inner surface of the compressor cover on the surface facing the compressor. Alternatively, it is possible to prevent the compressor driving sound from leaking to the outside when the compressor is driven when hot water is supplied, and the heat pump water heater can be made quieter. In addition, even if the compressor cover in the ventilation path is condensed by cold air from the air-refrigerant heat exchanger that is the evaporator, the inside is condensed by attaching a soundproof material to the inside of the compressor cover. Thus, it is possible to avoid a fear that the condensed water is applied to components such as a compressor and cause electric leakage, and a heat pump water heater excellent in safety can be obtained.

  According to a sixth invention, in the heat pump water heater of any one of the first to fifth inventions, a water pump connected to a water-refrigerant heat exchanger is provided in a hot water supply cycle, and the water pump is connected to an intermediate substrate support plate and a compression The water pump, which is a noise source like the compressor, is surrounded by a soundproofing material so that water is stored when hot water is stored or hot water is supplied. It becomes possible to prevent the driving sound of the water pump from leaking to the outside when the pump is driven, and a heat pump water heater with a quiet sound can be obtained.

  In addition, by placing a water pump with a lower profile than the compressor in front of the compressor, even if the water pump leaks, it is possible to prevent the water from being applied to the compressor that is driving at high pressure. Thus, a heat pump water heater excellent in safety can be obtained. In addition, it is possible to easily maintain a water pump having a high replacement frequency from the front, and it is possible to provide a heat pump water heater excellent in maintainability.

  The seventh invention is the heat pump water heater according to any one of the first to sixth inventions, wherein the soundproofing material has a heat insulating function, and the periphery of the compressor is kept warm by the heat insulating function of the soundproofing material. As a result, the compressor is kept warm by the soundproofing material, and it is possible to suppress the temperature drop until the compressor is started again after the compressor is turned off, and the rise time at the time of re-coping is shortened. The ability to supply hot water in the heat pump operation in a short time can reduce the amount of hot water in the hot water storage tank used until the transition to the heat pump operation, and as a result, the capacity of the hot water storage tank can be reduced. As a result, the main unit can be reduced in size, weight, and cost can be reduced, and the heat pump water heater can be made inexpensive with excellent installation versatility. In addition, the refrigerant cycle parts associated with the compressor can be kept warm, and the efficiency of the equipment can be improved by reducing the heat dissipation loss. Thereby, the heat pump performance can be improved, the COP can be improved, the running cost due to the electricity bill can be reduced, and the load on the global environment can be reduced.

  According to an eighth aspect of the present invention, in the heat pump water heater of any one of the first to seventh aspects, the hot water warmed by the water-refrigerant heat exchanger is stored in the hot water storage means and without passing through the hot water storage means. The tap water heated by the water-refrigerant heat exchanger can be used to supply hot water to the hot water storage tank, while faucets and showers are not connected to the hot water storage tank. Therefore, it is possible to provide a heat pump water heater that is excellent in quick hot water, easy to use, and does not have to worry about running out of hot water.

  In addition, hot water is supplied from a hot water storage tank at the beginning of operation, and after the compressor reaches the optimum operating frequency, it can be an instantaneous water heater type heat pump water heater that directly supplies hot water. Can be a machine.

  The ninth invention is a heat pump water heater according to any one of the first to eighth inventions, wherein carbon dioxide is used as a refrigerant, and the thermal efficiency at the time of high-temperature hot water supply is increased, and the refrigerant leaks to the outside. However, the impact on global warming can be greatly reduced compared to the R-410A refrigerant used in general air conditioners, and it is an environmentally friendly heat pump water heater with excellent recyclability. be able to.

  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)
Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the embodiments.

  1 is a schematic perspective view of a heat pump water heater of the present invention, FIG. 2 is a circuit configuration diagram, FIG. 3 is a front detailed interior view, FIG. 4 is a side interior view, and FIG. 5 is a side interior view at a position different from FIG. Indicates.

  As shown in FIG. 1, the main body unit 1 is configured such that the refrigerant cycle 2 and the hot water supply cycle 2 b are integrally stored. The refrigerant cycle 2 is mainly on the left side of the main body unit 1, and the hot water supply cycle 3 is on the main unit 1. It is disposed substantially to the right.

  The refrigerant cycle 2 has a closed circuit configured by sequentially connecting a compressor, a radiator, a decompression unit, and an air-refrigerant heat exchanger, and is vertically compressed on a substrate 4 at the bottom of the main unit 1. The machine 5 and the radiator 6 are placed. Moreover, the electric expansion valve 7 which is a decompression means is arrange | positioned between the compressor 5 and the heat radiator 6, and the compressor 5, the heat radiator 6, and the expansion valve 7 are arrange | positioned at the lower left part of the main body unit 1. FIG. . Above the radiator 6, there is an intermediate substrate 8 that is L-shaped when viewed from above and is wide at the back, and is provided with a certain gap from the substrate 3. In order to provide this gap, the intermediate substrate 8 is supported by an intermediate substrate support plate 9 which is also substantially L-shaped.

The compressor 5 is arranged in a substantially L-shaped inner side of the intermediate board support plate 9, and the intermediate board support plate 9 has a sound insulating material 10 (left side) on a vertical surface facing the compressor 5. The part indicated by the slanting diagonal line) is affixed. This soundproofing material 10 is a felt in which natural fibers are laminated on a material at a high density, and is used as a sound absorbing / insulating material having both sound absorbing performance and heat insulating performance. Further, since it is affixed to the vertical surface of the intermediate substrate support plate 9, not only is it affixed with an adhesive, but is also fixed with a jig in order to prevent peeling. The intermediate substrate support plate 9 provides a certain gap between the substrate 4 and the intermediate substrate 8, and the radiator 6 is placed outside the substantially L-shaped intermediate substrate support plate 9 and below the intermediate substrate 8. The position of the radiator 6 is restricted and fixed. In addition, among the refrigerant pipes that connect the components of the refrigerant cycle 2, the radiator inlet pipe 11a and the radiator outlet pipe 11b to the radiator are also piped along the intermediate substrate support plate 9, and excessive pipes. Even if this vibration occurs, it will come into contact with the soundproofing material 10, and damage to the piping can be prevented.

  The compressor 5 protrudes above the intermediate substrate support plate 9, that is, above the intermediate substrate 8, and is a box-shaped compressor so as to cover the protruded compressor 5 and components constituting the refrigerant cycle 2. A cover 12 is placed on the intermediate substrate 8. The compressor cover 12 is also attached with a soundproofing material 13 (shown by a diagonally downward slanting line) on the lower side and the side, that is, the inner side, and on the surface facing the compressor 5.

  Above the substantially L-shaped intermediate substrate 8, an air-refrigerant heat exchanger 14 constituting the refrigerant cycle 3 is placed, which is also substantially L-shaped. Inside the air-refrigerant heat exchanger 14, there is a blower fan 15 that is a blowing means. The air-refrigerant heat exchanger 14 is blown to increase the evaporation capacity and the heat pump heating capacity. . Reference numeral 16 denotes a fan motor for rotating the blower fan 15. Reference numeral 17 denotes a fan motor base holding the blower fan 15 and the fan motor 16. The fan motor base 16 is placed on the compressor cover 11. ing. Reference numeral 18 denotes a water-refrigerant heat exchanger (heat radiator) included in the hot water supply cycle 3 disposed at the end of the main unit 1, and the radiator 6 and the water-refrigerant exchanger 18 are integrally formed. There is an intermediate board support plate 9 on the right side of the water-refrigerant heat exchanger 18, an intermediate board 8 is on the upper side, and there are housings constituting the main unit 1 on the front, left, and rear sides. The water-refrigerant heat exchanger 18 is positioned and held.

  On the right side of the main unit 1, parts constituting the main hot water supply cycle 3 excluding the water-refrigerant heat exchanger 18 are provided, and 19 is tap water heated by the water-refrigerant heat exchanger 18. It is a hot water storage tank for storing the water. A hot water supply circuit 20 is disposed in front of the hot water storage tank 19. 21 is a water intake pipe for introducing tap water into the hot water storage tank 19 and the water-refrigerant heat exchanger 18, and 22 is a hot water supply terminal (faucet 30a, bath 44, FIG. 2) from the hot water storage tank 19 and the water-refrigerant heat exchanger 18. It is a hot water supply pipe for supplying hot water to the figure.

  Reference numeral 23 denotes a partition plate for partitioning the air-refrigerant heat exchanger 14, the blower fan 15, and the hot water storage tank 19. The rear is connected to the air-refrigerant heat exchanger 14 and the front is connected to the main unit 1. The hot water storage tank 19 is partitioned so as not to be exposed to the outside. Reference numeral 24 denotes a bath heat exchanger for chasing the hot water in the bath, and hot water is taken from the bath with a bath circulating water pump 26 disposed in front of the compressor 5 through a bathtub bath pipe 25 connected to the bath. The hot water and the hot water in the hot water storage tank 19 drawn from the hot water storage tank 19 by the additional heat pump 27 are heat-exchanged, and the hot water is returned to the bath by the bathtub hot water discharge pipe 28, whereby the hot spring is prepared. That is, the bath heat exchanger 24 is a water-water heat exchanger. Since the bath circulating water pump 26 draws in hot bath water that is dirty after bathing, the power of the bath circulating water pump 26 becomes excessive. For this reason, the bath circulation water pump 26 is a water pump having a large power.

  On the other hand, the bath circulating water pump 26 is also placed on the substrate 3 and arranged in a sufficient location in terms of strength, and is in front of the compressor 5 and is an L-shape with a soundproofing material 10 attached. It is arranged inside the intermediate board support plate 9 to prevent the driving sound of the bath circulating water pump 26. The loud sound is prevented from leaking outside the main unit 1. Moreover, since it exists also inside the compressor cover 12, even if it is in the soundproof material 13 of the compressor cover 12, it has prevented that a sound leaks outside.

Moreover, this bath heat exchanger 24 is attached above the partition plate 23, and is connected with the hot water storage tank 19 only by the tank piping 19a. In addition, the reason why the hot water hot water above the hot water storage tank 19 is drawn in by the additional cooking pump 27 so that the hot cooking can be performed in a short time. The additional cooking pump 27 is disposed above the bath circulating water pump 26 and in the vicinity of the bath heat exchanger 24. Hot water from the hot water storage tank 19 is also supplied from the bathtub outlet pipe 28, and hot water for the bath is also provided.

  Next, the circuit configuration diagram of each component shown in FIG. 1 will be described in detail with reference to FIG.

  In FIG. 2, the heat pump water heater of the present embodiment is configured by integrally storing a refrigerant cycle 2 and a hot water supply cycle 3 in a main unit 1.

  The refrigerant cycle 2 includes a compressor 5 disposed inside the main unit 1, a radiator 6, a decompression means 7 made of, for example, an electric expansion valve, and an L-shaped air-refrigerant heat exchanger 14. 29 is connected. In addition, a blower fan 15 is provided to apply air to the air-refrigerant heat exchanger 14 to increase the evaporation capacity.

  On the other hand, the hot water supply circuit is a water-refrigerant heat exchanger 18 that exchanges heat with the radiator 6 to change tap water or the like into warm water (for example, a heat exchanger having a double tube structure integrated with the radiator 6). ), A hot water storage tank 19 for storing hot water obtained by the water-refrigerant heat exchanger 18, a water inlet pipe 21 for entering tap water into the hot water storage tank 19 or the water-refrigerant heat exchanger 18, and a hot water storage tank 19 or water- The hot water supply pipe 22 supplies hot water from the refrigerant heat exchanger 18 to the hot water supply terminals of the faucet 30a and the shower 30b, and the hot water supply circulating water pump 31 supplies low temperature water in the hot water storage tank 19.

  Further, the configuration of the hot water supply circuit will be described.

  The tank inlet pipe 32 is a pipe that sends tap water from the inlet pipe 21 to the hot water storage tank 19, and a tank inlet check valve 33 is provided on the way. The tap water supply pipe 34 is a pipe that directly supplies tap water from the inlet pipe 21 to the radiator 6 (water-refrigerant heat exchanger 18), and a check valve 35 is provided in the tap water supply pipe 34. . The heat exchange water supply pipe 36 is a pipe that sends low temperature water stored in the hot water storage tank 19 downward from the hot water storage tank 19 to the water-refrigerant heat exchanger 18 by operation of the hot water supply circulation water pump 26. , A pipe for sending tap water heated by the water-refrigerant heat exchanger 18 to the hot water storage tank 19 and the original mixing valve 38. A hot water storage three-way valve 39 is provided in the middle of the hot water storage tank side pipe 37a, and the original mixing valve side. A check valve A40 is provided in the middle of the pipe 37b.

  The tank hot water supply pipe 41 is a pipe for supplying hot water (usually 60 ° C. to 90 ° C.) from the hot water storage tank 19 to the original mixing valve 38, and the original mixing valve 38 is a hot water storage pipe 37 (original mixing valve side pipe). 37b) and warm water or water coming from the tank hot water supply pipe 41, and the check valve A40 is a valve provided in front of the original mixing valve 38. The hot water supply mixing valve 42 is a valve that mixes hot water that has passed through the original mixing valve 33 and tap water supplied from the inlet pipe 21, obtains an appropriate hot water supply temperature, and supplies the hot water to the faucet 30a and the shower 30b. Between the hot water supply mixing valve 42 and the water inlet pipe 21, check valves B42a and 42b for preventing backflow are provided.

  The hot water that has reached the optimum temperature by the hot water supply mixing valve 42 is supplied to the faucet 30a and the shower 30b through the hot water supply pipe 22.

  43 is a bath pouring mixing valve, which is also a valve for mixing hot water that has passed through the original mixing valve 38 and tap water supplied from the inlet pipe 21 to obtain an appropriate hot water supply temperature and pouring water into the bath 44. Yes, a check valve C43b for preventing backflow is provided between the bath pouring mixing valve 43 and the inlet pipe 21. The hot water that has reached the optimum temperature in the bath pouring mixing valve 43 passes through the bath pouring pipe 45, passes through the backflow prevention valve 45a, is poured into the bath 44, and hot water is poured into the bath.

Reference numeral 24 denotes a bath heat exchanger which passes when hot water travels from the bath pouring mixing valve 43 to the bath 44. The bath heat exchanger 24 is a heat exchanger used when reheating hot water in the bath 44. Hot water is drawn from the bath by the bath circulating water pump 26 through the bath outlet pipe 25 from the bath 44. The hot water and the hot water in the hot water storage tank 19 drawn from the hot water storage tank 19 by the additional pump 27 are heat-exchanged and returned to the bath by the bathtub hot water pipe 28 to keep the temperature of the bath 44 constant. Even if the amount of hot water in the bath 44 is not increased, the additional cooking operation for raising the hot water temperature is performed. That is, the bath heat exchanger 24 is a water-water heat exchanger.

  Reference numeral 46 denotes an incoming water flow meter for measuring the incoming water flow rate, and hot water supply flow meter 47 is an instrument for measuring the hot water flow rate. The drain valve 48 is a valve used for draining water in the tank to prevent freezing when not used for a long time in a cold region or the like, and the control valve 49 is a valve for controlling the incoming water flow rate. 50 a is a pressure relief valve for the hot water storage tank 19, and 50 b is a can protection valve for the hot water storage tank 19.

  Further, the control device 51 detects the refrigerant temperature on the high-pressure side of the refrigerant cycle, determines the rising state of the refrigerant cycle based on the temperature level, and controls the original mixing valve 38, the hot water supply mixing valve 42, and the bath pouring mixing valve 43. It is means for controlling the opening.

  These components are arranged in the main unit in the schematic perspective view of FIG. 1 and the interior view of FIG. Next, the arrangement configuration of each element will be described with reference to FIG. 3 which is a detailed front view of the main unit 1. FIG. 3 is a detailed front view of the heat pump water heater shown in FIG. 1, and is a diagram in which the circuit diagram of FIG. 2 is arranged.

  On the left side of the main unit 1, a vertically placed compressor 5 and a radiator 6 (water-refrigerant heat exchanger 18) are placed on a substrate 4 at the bottom, which is a refrigerant cycle 2. The compressor 5, the radiator 6, the electric expansion valve 7 as decompression means, and the air-refrigerant heat exchanger 14 are connected in an annular shape to constitute the refrigerant cycle 2. Above the water-refrigerant heat exchanger 18 is an intermediate substrate 8 on which the air-refrigerant heat exchanger 14 is placed. In order to support the intermediate substrate 8, there is an intermediate substrate support plate 9 that is substantially L-shaped when viewed from above, which is placed on the substrate 4, and the compressor 5 is disposed inside the approximately L-shape. Has been. Further, a bath circulating water pump 26 is disposed in front of the compressor 5, and this bath circulating water pump 26 is also located inside the substantially L-shaped intermediate substrate support plate 9. On the vertical surface of the intermediate substrate support plate 9 facing the compressor 5 side, a soundproofing material 10 (shown with diagonal lines) is affixed.

  Further, the radiator 6 (water-refrigerant heat exchanger 18) is located outside the intermediate substrate support plate 9, and performs position regulation and fixed holding with the side housing 1a of the main unit 1. The compressor 5 protrudes above the intermediate substrate supporting plate 9, that is, above the intermediate substrate 8, and the box-shaped compressor cover 12 covers the protruding compressor 5 and the components constituting the refrigerant cycle 2. Is mounted on the intermediate substrate 8. The compressor cover 12 is also attached with a soundproofing material 13 (shown by a diagonally downward slanting line) on the lower side and the side of the compressor cover 12 and facing the compressor 5. Above the substantially L-shaped intermediate substrate 8, an air-refrigerant heat exchanger 14 constituting the refrigerant cycle 2 is placed, which is also substantially L-shaped. Inside the air-refrigerant heat exchanger 14, there is a blower fan 15 that is a blowing means. The air-refrigerant heat exchanger 14 is blown to increase the evaporation capacity and the heat pump heating capacity. . Reference numeral 16 denotes a fan motor for rotating the blower fan 15. Reference numeral 17 denotes a fan motor base holding the blower fan 15 and the fan motor 16. The fan motor base 16 is placed on the compressor cover 12. ing.

On the right side of the main unit 1, there are provided parts constituting the main hot water supply cycle 3, 19 is a hot water storage tank, 20 is a hot water supply circuit, 21 is a water inlet pipe, 22 is a hot water pipe, 23 is a partition plate, 24 is a bath heat exchanger, 25 is a bathtub hot water pipe, and 26 is a bath circulating water pump. The bath circulating water pump 26 is located in front of the compressor 5, inside the intermediate substrate support plate 9, covered with the compressor cover 12, and surrounded by the soundproof material 10 and the soundproof material 13. It will be. Reference numeral 27 denotes a reheating pump, and 28 is a bathtub tapping pipe. Further, a hot water storage three-way valve 39, a hot water mixing valve 42, a bath pouring mixing valve 43, a backflow prevention valve 45a, etc., which are components of the hot water supply cycle 3, are also arranged as shown in the figure. The control device 51 is arranged above the main unit 1 so as to be supported by the fan motor base 17. It is means for detecting the refrigerant temperature, determining the rising state of the refrigerant cycle based on the temperature level, and controlling the opening degree of the original mixing valve 38, the hot water supply mixing valve 42, and the bath pouring mixing valve 43. Reference numeral 52 denotes a leg of the main unit 1, which is attached to the substrate 4 so as to secure a piping space below.

  FIG. 4 is a side view of the detailed front view shown in FIG. 3 cut along AA. The numbers given in FIG. 4 are the same as those in FIG. 1, FIG. 2, and FIG. The radiator 6 (water-refrigerant heat exchanger 18) is located outside the intermediate board support plate 9. The intermediate board support plate 9, the side case 1 a (described in FIG. 3), the back case 1 b, and the intermediate substrate 8 are provided. And is positioned and held, and is strong in terms of strength.

  FIG. 5 is a side view of the detailed front view shown in FIG. 3 cut along BB. The numbers given in FIG. 4 are the same as those in FIG. 1, FIG. 2, and FIG. Reference numeral 1b denotes a rear case of the main unit, and there is a space between the rear case 1b and the intermediate substrate support plate 9, and the compressor 5 is double-wrapped by the intermediate substrate support plate 9 and the rear case 1b. Further, the soundproofing material 10 is attached to the opposite surface of the compressor 5 on the intermediate substrate support plate 9.

  Hereinafter, the operation of the heat pump water heater will be described based on the drawings.

When the compressor 5 is operated, the refrigerant compressed and discharged to a high pressure is sent to the radiator 5 (water-refrigerant heat exchanger 18) to exchange heat with tap water that has passed through the tap water supply pipe 34. Dissipate heat.
Thereby, the tap water flowing through the hot water storage pipe 37 and the original mixing valve 38 is heated to a high temperature. The refrigerant flowing out of the radiator 6 (water-refrigerant heat exchanger 18) is decompressed and expanded by the decompression means 7, sent to the air-refrigerant heat exchanger 14, and exchanges heat with the air sent by the blower fan 15. Then, it evaporates and gasifies while passing through the air-refrigerant heat exchanger 14. The gasified refrigerant is again sucked into the compressor 5 and is compressed again. The gradually heated tap water passes through the original mixing valve side pipe 37b and the original mixing valve 31, and passes through the faucet 30a and the shower. Hot water is supplied to 30b or poured into the bath 44.

  And since the refrigerant cycle 2 has a slow rise and is inferior in quick hot water, the hot water storage tank 19 compensates for the poor rise. That is, until the refrigerant cycle 2 starts up and reaches a predetermined hot water supply temperature, the hot water passing through the tank hot water supply pipe 41 from the hot water storage tank 19 kept at a high temperature and the water-refrigerant heat exchanger 18 that has not yet started up. Water that has passed through the water (water that gradually rises in temperature and becomes hot) is mixed with the original mixing valve 38, and tap water that has passed through the inlet pipe 21 with the hot water mixing valve 42 and the bath pouring mixing valve 43 Mix and perform hot water supply or pouring at a predetermined temperature.

  Next, when the refrigerant cycle starts, the opening degree of the original mixing valve 38 is adjusted, hot hot water from the hot water storage tank 19 and hot water from the water-refrigerant heat exchanger 18 are mixed at an appropriate temperature, and a hot water supply mixing valve 42 and the bath pouring mixing valve 43 are mixed with the tap water that has passed through the water inlet 21 by the hot water mixing valve 42 and the bath pouring mixing valve 43 to supply hot water.

Finally, the opening of the original mixing valve 38 is adjusted, the tank hot water supply pipe 31 side is closed, and the hot water passing through the tank hot water supply pipe 41 from the hot water storage tank 19 is not used. Hot water obtained by heating the tap water that has passed through the pipe 34 and the check valve 35 with the water-refrigerant heat exchanger 18 of the refrigerant cycle 2 is supplied through the original mixing valve 38 with the hot water supply mixing valve 42 and bath pouring. The mixture is sent to the mixing valve 43 and mixed with the tap water that has passed through the water inlet pipe 21 to obtain a predetermined temperature, and hot water is supplied to the faucet 30a and the shower 30b and poured into the bath 44. That is, the control device 51 grasps the rising state of the refrigerant cycle 2, adjusts the opening degree of the original mixing valve 38, the hot water mixing valve 42, and the bath pouring mixing valve 43, and supplies hot water at a predetermined temperature to the hot water supply terminal. Control is performed.

  Further, when the user closes the faucet 30a and the shower 30b, or when it is not necessary to supply hot water because an appropriate amount of hot water is accumulated in the bath 44, the hot water circulating water pump 31 is driven, the three-way valve 39 is opened, and the next hot water supply For operation, a hot water storage operation in which hot hot water is stored in the hot water storage tank 19 is performed.

  In this way, depending on the rising state of the refrigerant cycle 2, hot water stored in the hot water storage tank 19 is used to supply hot water to the hot water supply terminal (faucet 30 a, shower 30 b, bath 44), without using the hot water storage tank 19. The hot water obtained by heating with the water-refrigerant heat exchanger 18 can be directly supplied to the hot water supply terminal. Thereby, in this Embodiment, real-time hot water supply is enabled, the hot water hot water performance which can supply hot water when a user wants to supply hot water can be ensured, and a heat pump water heater which is easy to use can be provided. In other words, by ensuring this quick hot water performance, the capacity of the hot water storage tank 19 can be made smaller than that of the hot water storage type heat pump water heater, greatly improving installation, reducing costs, and improving usability. Can also be realized.

  At this time, the heat pump water heater of the present invention generates a drive sound of the compressor 5 when the compressor 5 is driven when hot water is stored or when hot water is supplied. The soundproofing material 10 and the soundproofing material 12 inside the compressor cover 11 can prevent leakage to the outside, so that a heat pump water heater that is quiet both in terms of actual hearing and noise can be obtained. it can. In particular, hot water obtained by heating with the water-refrigerant heat exchanger 18 without going through the hot water storage tank 19 is directly supplied to the faucet 30 or the like as a hot water supply terminal. When hot water is stored in the hot water storage tank 19 in a short time, the compressor 5 is rotated at a high frequency to produce high capacity and produce hot water at an early stage in order to prevent hot water shortage. is required. For this reason, the compressor 5 emits high noise accompanying a high rotational speed. In particular, when the number of revolutions is high, the generated noise is generally in the high frequency band, and the soundproofing material 10 is pasted on the vertical surface of the intermediate board support plate 9 to prevent noise from leaking to the outside. It is possible.

  Further, the scene where the compressor 5 is driven at such a high rotational speed is mainly the case where the shower 30b after hot water is stored in the bath 44 is used, and it often falls in the midnight time zone. Therefore, it can be said that reducing the noise value in the midnight time zone is a very important essential matter for a heat pump water heater. The soundproofing materials 10 and 12 are felts in which natural fibers are laminated at a high density on a material, and are used as a sound absorbing and heat insulating material having both sound absorbing performance and heat insulating performance. The parts of the machine 5 and the refrigerant cycle 2 are kept warm by the heat insulating function. Thereby, after the compressor 5 is turned off, until the compressor 5 is started again, for example, washing is performed in the daytime, and a heat pump water heater is used to bathe in the bath 44 from the evening to the evening. For example, when the heat pump water heater is used again to perform hot water filling, the temperature drop of the compressor 5 can be suppressed.

Therefore, it becomes possible to prevent the viscosity of the oil in the compressor 5 from increasing due to a temperature drop, and it is possible to shorten the rise time at the time of restart. Thereby, the hot water supply in the heat pump operation can be performed in a short time, so that the amount of hot water in the hot water storage tank 19 used until the transition to the heat pump operation can be reduced. As a result, the capacity of the hot water storage tank 19 can be reduced. The main unit 1 can be reduced in size, weight and cost, and can be an inexpensive heat pump water heater excellent in installation versatility. In addition, the two refrigerant cycle parts associated with the compressor 5 can be kept warm, and the efficiency of the equipment can be improved by reducing the heat dissipation loss. Thereby, the heat pump performance can be improved, the COP can be improved, the running cost due to the electricity bill can be reduced, and the load on the global environment can be reduced.

  In addition, the bath circulating water pump 26, which is a large noise source similar to the compressor 5, leaks to the outside by the soundproof material 10 inside the intermediate board support plate 9 and the soundproof material 12 inside the compressor cover 11. In addition, it is possible to provide a quiet heat pump water heater in terms of sound and noise. In particular, the bath circulating water pump 26 sucks hot water from the bath 44 and flows it to the bath heat exchanger 24, where it exchanges heat with hot water from the hot water storage tank 19 and returns it to the bath 44 again. The bath 44 is generally contaminated with hair, dirt, and the like, and a filter is provided in the bathtub hot-water pipe 25 so that the bath heat exchanger 24 is not clogged when sucking it.

  For this reason, the suction power of the bath circulating water pump 26 requires a greater amount of power than other additional cooking pumps 27 and the hot water supply circulating water pump 31, and the noise is increased accordingly. It is important for reducing the noise that the bath circulating water pump 26 is covered with the soundproofing material 10 inside the intermediate board support plate 9 and the soundproofing material 12 inside the compressor cover 11. It is an important point. In addition, by arranging the radiator inlet pipe 11a, the radiator outlet pipe 11b, and the soundproofing material 9 inside the intermediate board support plate 9, the radiator inlet pipe 11a and the radiator outlet are caused by the vibration of the compressor 5. Even if the pipe 11b vibrates and comes into contact with the intermediate board support plate 9, the buffering action of the soundproofing material 9 can prevent the generation of abnormal noise and breakage of the pipe, thereby improving safety. .

  As can be seen from FIG. 4, the water-refrigerant heat exchanger 18 is disposed outside the intermediate substrate support plate 9, and the intermediate substrate support plate 9, the side housing 1a, the rear housing 1b, and the intermediate substrate. 8 is surrounded, positioned and held, and is strong in strength. Moreover, by surrounding in that way, the heat retention property of the water-refrigerant heat exchanger 18 is improved, and the heat rate is improved. Further, the noise generated by the compressor 5 and the bath circulating water pump 16 is surrounded by the intermediate board support plate 9 and the water-refrigerant heat exchanger 18 located outside the intermediate board support plate 9, and the noise leaks to the outside. To reduce noise. Further, since the water-refrigerant heat exchanger 18 and the compressor 5 are partitioned by the intermediate substrate support plate 9, even if the water-refrigerant heat exchanger 18 leaks, the compressor 5 is filled with water. It is possible to prevent the application of water, to prevent the occurrence of electric leakage, and to provide a safe heat pump water heater.

  Further, as can be seen in FIG. 5, a gap is provided between the intermediate substrate support plate 9 and the rear housing 1b of the main unit 1, and the intermediate substrate support plate 9 is provided between the compressor 5 and the rear housing 1b. The intermediate board support plate 9 is provided outside the compressor 5, and the rear housing 1b is provided outside the compressor 5 so that the noise generated by the compressor is intermediate. The board support plate 9 and the back casing 1b are surrounded by two layers, so that the drive sound of the compressor can be prevented from leaking to the outside. In addition to the soundproofing materials 10 and 13, the double partition wall Further noise reduction can be realized.

The hot water heated by the water-refrigerant heat exchanger 18 is initially mixed with hot water in a hot water storage tank 19 storing hot hot water and tap water to supply hot water and hot water. Is raised, the opening of the original mixing valve 38 is adjusted, hot hot water from the hot water storage tank 19 and hot water from the water-refrigerant heat exchanger 18 are mixed at an appropriate temperature, a hot water mixing valve 42 and a bath It is fed to the hot water mixing valve 43 and mixed with the tap water that has passed through the inlet pipe 21 by the hot water mixing valve 42 and the bath pouring mixing valve 43 to supply hot water and hot water. The hot water from the hot water storage tank 19 is not used and hot water from the hot water storage tank 19 is not used, and tap water that has passed through the inlet pipe 21, tap water supply pipe 34, and check valve 35 is used as the water in the refrigerant cycle 2. -Hot water obtained by heating in the refrigerant heat exchanger 18 via the original mixing valve 38, hot water supply mixing valve 2. It is sent to the bath pouring mixing valve 43 and mixed with tap water that has passed through the inlet pipe 21 to obtain a predetermined temperature, and hot water is supplied to the faucet 30a and the shower 30b and hot water is poured into the bath 44. .

  That is, the control device 51 grasps the rising state of the refrigerant cycle 2, adjusts the opening degree of the original mixing valve 38, the hot water mixing valve 42, and the bath pouring mixing valve 43, and supplies hot water at a predetermined temperature to the hot water supply terminal. Control is performed. Thus, hot water can be supplied and stored without going through the hot water storage tank 19 which is a hot water storage means, enabling real-time hot water supply and ensuring the quick hot water performance that can supply hot water when the user wants to supply hot water. A good heat pump water heater can be provided. By ensuring the quick hot water performance, the capacity of the hot water storage tank 19 can be made smaller than that of the hot water storage type heat pump water heater, and the main unit 1 can be made compact, and the installation performance can be greatly improved. It will also be possible to improve usability.

  Moreover, in this Embodiment, it is set as the heat pump water heater using the carbon dioxide gas as a refrigerant | coolant. Thereby, the refrigerant circulation circuit is a supercritical refrigerant circulation circuit in which the pressure of the refrigerant becomes equal to or higher than the critical pressure, and the flowing water in the water flow path of the refrigerant-water heat exchanger is heated by the refrigerant whose pressure is increased to the critical pressure or higher. Since the refrigerant flowing through the radiator of the refrigerant-water heat exchanger is pressurized above the critical pressure by the compressor, the temperature is lowered due to heat being taken away by the flowing water in the water flow path of the refrigerant-water heat exchanger. Without condensation, it becomes easy to form a temperature difference between the refrigerant and water in the entire area of the refrigerant-water heat exchanger, high-temperature hot water can be obtained, and the heat exchange efficiency can be increased.

  In addition, since it is carbon dioxide, even if the refrigerant leaks to the outside, the effect on global warming is greatly reduced compared to the R-410A refrigerant used in general air conditioners. Can be made into an environmentally friendly heat pump water heater.

  The heat pump water heater of the present invention, as a heat pump water heater, can prevent the drive sound of the compressor from leaking to the outside when the compressor is driven when hot water is stored or when hot water is supplied. Can be a quiet heat pump water heater. Especially when the refrigerant cycle is driven by bathing or the like at midnight, it is very important for a heat pump water heater to reduce noise.

  Also, by keeping the compressor area warm with soundproofing material that has a heat insulation function, the compressor is kept warm with the soundproofing material, and after the compressor is turned off, the temperature drops until the compressor is started again. The amount of hot water in the hot water storage tank that is used up to the transition to the heat pump operation can be reduced. As a result, the capacity of the hot water storage tank can be reduced, and as a result, the main unit can be made compact, lightweight, and cost can be reduced. It is excellent in installation versatility and can be an inexpensive heat pump water heater. In addition, the refrigerant cycle parts associated with the compressor can be kept warm, and the efficiency of the equipment can be improved by reducing the heat dissipation loss. Thereby, the heat pump performance can be improved, the COP can be improved, the running cost due to the electricity bill can be reduced, and the load on the global environment can be reduced.

  As described above, the present invention is applied to a 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 instantaneous water heater or a commercial hot water supply device.

The perspective view of the heat pump water heater in the 1st Embodiment of this invention Circuit diagram of the heat pump water heater Front view of the heat pump water heater AA sectional view of FIG. BB sectional view of FIG. Circuit diagram of a conventional heat pump water heater Circuit diagram of another conventional heat pump water heater A perspective view of a conventional heat pump water heater

Explanation of symbols

1 Main unit (case exterior)
2 Refrigerant cycle 3 Hot water supply cycle 4 Substrate 5 Compressor 6 Radiator 7 Pressure reducing device (electric expansion valve)
8 Intermediate substrate 9 Intermediate substrate support plate 10 Soundproof material (Soundproof material of intermediate substrate support plate)
12 Compressor cover 13 Soundproof material (Soundproof material for compressor cover)
DESCRIPTION OF SYMBOLS 14 Air-refrigerant heat exchanger 15 Blower fan 18 Water-refrigerant heat exchanger 19 Hot water storage tank 21 Intake pipe 22 Hot water supply pipe 26 Water pump (bath circulation water pump)

Claims (9)

A compressor, a radiator, a decompression means, and an air-refrigerant heat exchanger are sequentially connected to form a closed circuit, a refrigerant cycle for circulating the refrigerant, a water-refrigerant heat exchanger for exchanging heat with the radiator, A hot water supply cycle having a hot water storage tank connected to the water-refrigerant heat exchanger and storing hot water heated by the water-refrigerant heat exchanger; the compressor; a substrate for mounting the hot water storage tank; An intermediate base provided with a gap with the substrate; and a substantially L-shaped intermediate base support plate for supporting the intermediate base; the air-refrigerant heat exchanger is placed on the intermediate base; A heat pump water heater, wherein the compressor is disposed inward and forward of a support plate, and a soundproof material is provided on a surface of the intermediate substrate support plate facing the compressor. The heat pump water heater according to claim 1, wherein a water-refrigerant heat exchanger is disposed outside the intermediate substrate support plate. 3. The housing according to claim 1, further comprising a housing exterior provided with a gap and an intermediate substrate support plate, wherein the intermediate substrate support plate is disposed between the housing exterior and the compressor. Heat pump water heater. The heat pump water heater according to any one of claims 1 to 3, wherein a compressor cover that covers the compressor is provided above the intermediate substrate, and a top portion of the compressor cover protrudes from the intermediate substrate. The heat pump water heater according to claim 4, wherein a soundproof material is provided on a surface facing the compressor inside the compressor cover. The water pump connected to a water-refrigerant heat exchanger is provided in the hot water supply cycle, and the water pump is arranged inside the intermediate substrate support plate and the compressor cover. The heat pump water heater according to item. The heat pump water heater according to any one of claims 1 to 6, wherein the soundproofing material has a heat insulating function. The hot water heated by the water-refrigerant heat exchanger is stored in a hot water storage tank and can be directly passed to a hot water supply terminal without going through the hot water storage tank. The heat pump water heater according to any one of the above. The heat pump water heater according to any one of claims 1 to 8, wherein carbon dioxide is used as the refrigerant.

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