JP3772894B2 - Heat pump water heater - Google Patents

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 without the need for new infrastructure even in all-electric houses and condominiums. Because it is a heat pump type, it has more than three times the capacity for input. It is possible to store high-temperature hot water in a hot water storage tank by using inexpensive late-night electricity during operation, and has the feature that running cost is also low, and gradually Has become popular.

  As such a water heater, there is a heat pump water heater configured as described below. As shown in FIG. 10, this heat pump water heater includes a hot water supply cycle 71 and a refrigerant cycle 72, and is put in two boxes of a hot water storage unit and a heat pump unit, which are separate main body units. 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. Further, the refrigerant cycle 72 is configured by connecting a compressor 81, a water heat exchanger 82 constituting a heat exchange path 76, a decompression mechanism 83, and an evaporator 84 as an air heat exchanger through a refrigerant passage 85 in order. A refrigerant circulation circuit 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 type hot water heater operates an energy efficient heat pump circuit by using inexpensive electric power at night, and circulates the water in the hot water storage tank 75 by the water circulation pump 77, and the water heat exchanger 82 performs a predetermined operation. The hot water temperature is raised until it reaches a predetermined hot water temperature, and it is detected that the predetermined hot water temperature has been reached, and the operation of the refrigerant cycle is stopped. Normally, when hot water is used at the hot water supply port 74, hot water is supplied by mixing with tap water to an appropriate temperature desired by the user, so the temperature of the hot water stored in the hot water storage tank 75 is high. It is better to make it as high as possible, so that the amount of tap water added to lower the temperature is increased, the amount of hot water taken out from the hot water storage tank 75 is decreased, and problems such as running out of hot water are less likely to occur. .

  As an example of the heat pump unit of the heat pump water heater, there is a heat pump unit as shown in FIGS. In this heat pump unit, a compressor 101, a water-refrigerant heat exchanger 102, and an evaporator 103 composed of an air heat exchanger as an evaporator are sequentially connected by a refrigerant circulation pipe (not shown). And the upper part of the board | substrate 104 which supports the bottom face of a unit apparatus is divided by the noise-insulation board 105 for noise prevention, and the vertical installation type compressor 103 is mounted in one division, The inside of the ventilation circuit which is the other division Are mounted with a blower fan 106, an evaporator 105 composed of an air heat exchanger located on the back of the blower fan 106, and a water-refrigerant heat exchanger 104 located under the blower fan 106.

  Moreover, there is a heat pump type water heater having the following configuration as an integrated type of heat pump unit and hot water storage unit. This is one in which a hot water supply cycle and a refrigerant cycle are housed in a single box, a compressor, a radiator, a decompression means and an evaporator are connected in sequence to form a closed circuit, and a refrigerant cycle for circulating the refrigerant, A hot water storage tank, a water circulation pump that circulates water in the hot water storage tank, a water heat exchanger that exchanges heat of water circulated by the water circulation pump with the condenser, a water supply pipe that supplies water to the hot water storage tank, and the hot water storage tank A hot water supply pipe for supplying hot water, the water supply pipe is branched and connected to an inlet side of the hot water storage tank and an inlet side of the water heat exchanger, and the hot water supply pipe is connected to an outlet side of the hot water storage tank and the water heat exchanger. A water-refrigerant heat exchanger comprising the water heat exchanger and the condenser, provided with a valve branched and connected to the outlet side of the hot water storage tank, and 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 Wrap in a spiral And forming in a cylindrical shape, the hot water storage tank is installed so as to surround the one in which is housed the refrigerant cycle and the hot water supply cycle one box body (e.g., see Patent Document 2, Non-Patent Document 3).

  FIG. 13 is a circuit configuration diagram of such a heat pump water heater, and FIG. 14 is a schematic configuration diagram of the heat pump water heater shown in FIG.

  The heat pump water heater shown in FIG. 13 includes a refrigerant cycle 110, a water circulation circuit 111, a water supply pipe 112, and a hot water supply pipe 113. The water supply pipe 112 is connected to the inlet side of the hot water tank 114 and the outlet side of the water-refrigerant heat exchanger 115. The valves 116 and 117 are connected to be branched and connected to switch between hot water supply from the hot water supply tank 114 and hot water supply from the water-refrigerant heat exchanger 115, and the water-refrigerant heat exchanger 115 is spirally wound into a cylindrical shape. In addition, it is installed so as to surround the hot water supply tank 114, and the refrigerant cycle 110 and the water circulation circuit 111 are accommodated in one box.

The heat pump water heater shown in FIG. 14 includes compressors 120 and 121, water-refrigerant heat exchangers 122 and 123, pressure reducing valves 124 and 125, evaporators 126 and 127, and blowers 128 and 129 as a refrigerant cycle. A hot water supply cycle comprising a hot water storage tank 130, a mixing valve 131, an electromagnetic valve 132, a hot water supply circulating water pump 133, a hot water circulating hot water circulating water pump 134, etc., is constructed with a refrigerant cycle, and hot water is generated in the refrigerant cycle. Thus, hot water is directly supplied to the faucet 135 and the bath 136, or hot water is supplied from a hot water supply circuit. And this heat pump water heater is comprised by the integrated type which accommodated all the refrigerant | coolant cycles and hot water supply cycles in one unit, as shown in FIG.
JP 2003-222392 A JP 2003-314892 A Weekly air conditioner distributor May 15, 2003 issue (VOL.24-No.896)

However, in the heat pump type hot water heater as described in Patent Document 1 , the hot water storage unit and the heat pump unit are separated, and a configuration is adopted in which hot water is stored in a large capacity hot water storage tank using midnight power. A tank is required, and the hot water supply cycle 71 is used as a hot water storage unit, and in addition to that, it must be made into two main units of a heat pump unit provided with a refrigerant cycle 72, and the installation is large enough to install these units. Space was needed. For this reason, there is a problem that the installation location is limited.

  In addition, assuming that it is used in 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 exceeds 400 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.

  On the other hand, in the heat pump unit of FIGS. 11 and 12, the upper portion of the substrate 104 is partitioned by a sound insulating plate 105, the compressor 101 is mounted on one side, the evaporator 103 including the blower fan 106 and the air heat exchanger, and hot water supply water on the other side. -Since the refrigerant heat exchanger 102 is mounted, it has a long side shape and requires installation space. Furthermore, when the area of the evaporator composed of an air heat exchanger is increased in order to increase the heat pump capability, the lateral width is increased and further installation space is required.

  In addition, since the evaporator 103 composed of the water-refrigerant heat exchanger 102, the blower fan 106, and the air heat exchanger is located outside and the compressor 101 is located inside, it is necessary to waterproof the refrigerant piping that connects them. There were problems in terms of installation, construction, and cost, such as leading to cost increases.

  In addition, the heat pump water heater shown in Patent Document 2 and Non-Patent Document 3 is configured as an integrated type in which the refrigerant cycle and the hot water cycle are all housed in one unit, and has excellent workability such as few pipe connections. However, since the unit itself is large and heavy, there is a problem that it is difficult to install because of poor installation.

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, when the integrated main body is large and heavy, it has a problem of maintenance. Further, as shown in FIG. 13, 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.

  Therefore, the present invention solves such a conventional problem, and can improve the storage and maintainability of the water-refrigerant heat exchanger and the evaporator, and improve the capacity while reducing the size. An object of the present invention is to provide a heat pump water heater that can be used at low cost and is easy to use.

In order to solve the above-described conventional problems, a heat pump water heater of the present invention comprises a refrigerant circulation circuit that circulates a refrigerant by connecting a compressor, a radiator, a decompression unit, and an evaporator in order to form a closed circuit, and the evaporation A fan for blowing air to a heat exchanger, a water-refrigerant heat exchanger for exchanging heat with the radiator, a hot water storage tank for storing heated hot water, and tap water to the water-refrigerant heat exchanger or the hot water storage tank. An inlet pipe to be supplied, a hot water pipe connected so as to pass heated hot water to a hot water supply terminal, a main unit , an intermediate board provided below the evaporator, and a hot water pipe from the hot water storage tank to the hot water pipe. a tank hot-water supply pipe to send the water, the water - with a hot water storage pipe from the refrigerant heat exchanger Send hot water in the hot water storage tank, and a valve for connecting the hot water storage pipe and the tank hot water supply pipe, the radiator and the Water-refrigerant heat exchanger In the intermediate substrate downward, and while being arranged in the compressor and the same compartment, the said blowing fan and the refrigerant circuit water - are disposed between the refrigerant heat exchanger on one side in the main unit The hot water supply to the hot water supply terminal of the hot water in the hot water storage tank is provided by arranging the water inlet pipe, the hot water storage tank, and the hot water supply pipe on the other side in the main body unit and adjusting the opening of the valve. And hot water heated by the water-refrigerant heat exchanger without passing through the hot water storage tank can be directly supplied to the hot water supply terminal, and carbon dioxide gas is used as a refrigerant. It is possible to reduce the horizontal width of the housing, greatly reduce the installation area, and greatly improve the degree of freedom of installation.

  In particular, it is equipped with a hot water storage tank, and this hot water storage tank is arranged on the right side, and the compressor, water-refrigerant heat exchanger, and water pump are arranged on the left side. Even without this, the capacity of the hot water storage tank can be increased.

  Furthermore, in order to increase the heat pump capacity and perform hot water supply operation with the operation of the heat pump alone without going through the hot water storage tank, it extends upward to increase the area of the evaporator consisting of an air heat exchanger as an evaporator. However, the installation area can be kept completely unchanged, the capacity of the hot water storage tank can be increased in the height direction, and the usability can be improved while improving the degree of freedom of installation.

  In addition, the refrigerant circulation circuit and the hot water supply circuit are divided into left and right parts, so there is no need to touch the other circulation circuits when maintaining each circulation circuit, and maintenance man-hours can be greatly reduced and maintenance work can be greatly reduced. Workability is greatly improved by eliminating mistakes.

Furthermore, the compressor and water - Ri particular good to distribution in the same compartment of the refrigerant heat exchanger, together with the waterproof-related parts is not necessary, it becomes possible to shorten the pipe length, the heat loss in piping channel It is possible to improve the efficiency and reduce the cost.

  In addition, by arranging the hot water supply circuit in front of the hot water tank and arranging the hot water tank and the hot water supply circuit in the same compartment, the length of the hot water supply circuit can be shortened, and the flow resistance can be reduced. The effect of being able to provide an instantaneous water heater type heat pump water heater that can increase the flow rate during water heater operation sufficiently, improve performance, have a wide capacity range and excellent controllability at low cost. Play.

Further, since the tap water heated by the water-refrigerant heat exchanger is supplied to the hot water storage tank and directly passes through the hot water supply terminal without passing through the hot water storage tank, the water-refrigerant heat is supplied. The tap water heated by the exchanger can be supplied to the hot water storage tank, and on the other hand, it passes directly to the hot water supply terminals such as faucets and showers without going through the hot water storage tank. Therefore, it is possible to provide a heat pump water heater that does not worry about running out of hot water.

In addition, since carbon dioxide is used as the refrigerant, the thermal efficiency at the time of high-temperature hot water supply is increased, and even if the refrigerant leaks to the outside, the influence on global warming is affected by the refrigerant of R-410A used in general air conditioners. The heat pump water heater can be greatly reduced compared to the environment, is environmentally friendly, and has excellent recyclability.

  ADVANTAGE OF THE INVENTION According to this invention, the storage property and maintainability of a water-refrigerant heat exchanger or an evaporator can be improved, the capacity can be improved while downsizing, and the heat pump is easy to use at low cost. A water heater can be provided.

According to a first aspect of the present invention, a compressor, a radiator, a decompression unit, and an evaporator are sequentially connected to form a closed circuit, a refrigerant circulation circuit that circulates a refrigerant, a blower fan that blows air to the evaporator, and the radiator A water-refrigerant heat exchanger for exchanging heat with water, a hot water storage tank for storing heated hot water, an inlet pipe for supplying tap water to the water-refrigerant heat exchanger or the hot water storage tank, and heated hot water A hot water supply pipe connected to pass water to a hot water supply terminal, a main body unit , an intermediate board provided below the evaporator, a tank hot water pipe for sending high-temperature water from the hot water storage tank to the hot water supply pipe, and the water- A hot water storage pipe for sending high-temperature water from the refrigerant heat exchanger to the hot water storage tank; and a valve for connecting the tank hot water supply pipe and the hot water storage pipe; and the radiator and the water-refrigerant heat exchanger include the intermediate substrate And in the same compartment as the compressor Together are arranged, the said refrigerant circuit and the blowing fan water - a refrigerant heat exchanger is disposed on one side in the main unit, the and said hot water supply pipe and the entering-water pipe and the hot water storage tank Hot water supply to the hot water supply terminal of hot water in the hot water storage tank and the water-refrigerant heat exchange without going through the hot water storage tank by being arranged on the other side in the main unit and adjusting the opening of the valve The hot water heated by the water heater can be directly supplied to the hot water supply terminal, and carbon dioxide gas is used as a refrigerant. This makes it possible to reduce the width of the main unit and greatly reduce the installation area. Can be reduced, and the degree of freedom of installation is greatly improved.

  In particular, it is equipped with a hot water storage tank, and this hot water storage tank is arranged on the right side, and the compressor, water-refrigerant heat exchanger, and water pump are arranged on the left side. Even without this, the capacity of the hot water storage tank can be increased.

Furthermore, in order to increase the heat pump capacity and perform hot water supply operation with the operation of the heat pump alone without going through the hot water storage tank, it extends upward to increase the area of the evaporator consisting of an air heat exchanger as an evaporator. However, the installation area can be kept completely unchanged, the capacity of the hot water storage tank can be increased in the height direction, and the usability can be improved while improving the degree of freedom of installation.

  In addition, the refrigerant circulation circuit and the hot water supply circuit are divided into left and right parts, so there is no need to touch the other circulation circuits when maintaining each circulation circuit, and maintenance man-hours can be greatly reduced and maintenance work can be greatly reduced. Workability is greatly improved by eliminating mistakes.

  Furthermore, by arranging the compressor and the water-refrigerant heat exchanger in the same section, waterproofing-related parts are not required, and the piping length can be shortened, reducing heat loss in the piping path. It is possible to improve efficiency and reduce the cost.

  In addition, by arranging the hot water supply circuit in front of the hot water tank and arranging the hot water tank and the hot water supply circuit in the same compartment, the length of the hot water supply circuit can be shortened, and the flow resistance can be reduced. The effect of being able to provide an instantaneous water heater type heat pump water heater that can increase the flow rate during water heater operation sufficiently, improve performance, have a wide capacity range and excellent controllability at low cost. Play.

Further, since the tap water heated by the water-refrigerant heat exchanger is supplied to the hot water storage tank and directly passes through the hot water supply terminal without passing through the hot water storage tank, the water-refrigerant heat is supplied. The tap water heated by the exchanger can be supplied to the hot water storage tank, and on the other hand, it passes directly to the hot water supply terminals such as faucets and showers without going through the hot water storage tank. Therefore, it is possible to provide a heat pump water heater that does not worry about running out of hot water.

In addition, since carbon dioxide is used as the refrigerant, the thermal efficiency at the time of high-temperature hot water supply is increased, and even if the refrigerant leaks to the outside, the influence on global warming is affected by the refrigerant of R-410A used in general air conditioners. The heat pump water heater can be greatly reduced compared to the environment, is environmentally friendly, and has excellent recyclability.

A second invention is a hot water supply circuit having a water inlet pipe and hot water supply pipe, and a front plate constituting a front side of the main unit, the front plate, the refrigerant circulation circuit between the blower fan and the water - refrigerant heat exchanger a refrigerant circuit side front plate arranged on the side, to a disposed a hot water supply circuit side front plate to the hot water supply circuit side, made of are constructed separately, when maintenance of the hot water supply circuit, a refrigerant circulates The circuit is not touched, and conversely, when the refrigerant circulation circuit is being maintained, the hot water supply circuit is not touched, so that erroneous work during the maintenance can be prevented and the maintainability can be greatly improved. .

A third invention includes a hot water supply circuit having a water inlet pipe and a hot water supply pipe, and a plurality of hot water storage tanks are arranged on one side of the main body unit and on the side of the refrigerant circulation circuit and others, with arranging the hot water supply circuit and the hot water supply pipe in front of the hot water storage tank on the side of the refrigerant circuit, wherein the front of the hot water storage tank, and a connecting pipe for connecting said the other of the hot water storage tank and the hot water supply circuit With the arrangement, the distance between the refrigerant circulation circuit and the hot water supply circuit can be shortened, and heat dissipation loss can be reduced. In addition, the hot water supply circuit can be maintained without disassembling other hot water storage tank portions during maintenance, and workability can be improved.

  4th invention is equipped with the front board which comprises a plurality of hot water storage tanks, and constitutes the front side of a main unit, and the front board has a separate hot water tank front board for each of the plurality of hot water storage tanks. Therefore, maintenance can be performed by opening a predetermined front plate at the time of maintenance, and the front plate can be reduced in size and can be easily attached and detached, thereby shortening the maintenance time.

A fifth invention is provided with a hot water supply circuit having a water inlet pipe and hot water supply pipe, a hot water storage tank, with a plurality disposed behind the other and of the hot water supply circuit, among the plurality of hot water storage tanks, the hot water supply circuit The hot water storage tank arranged at the rear is larger than other hot water storage tanks, and the capacity of the hot water storage tank can be secured when the refrigerant circulation circuit and hot water supply circuit are configured with a single hot water storage tank. With or without other hot water storage tanks, the main body can be shared, and for multiple types of main bodies (one hot water tank, two hot water tanks, three hot water tanks or more) This makes it possible to reduce mold investment as much as possible.

A sixth invention is provided with a hot water supply circuit having a water inlet pipe and hot water supply pipe, a hot water storage tank, with a plurality disposed behind the other and of the hot water supply circuit, among the plurality of hot water storage tanks, the hot water supply circuit The hot water storage tank placed at the rear has a smaller capacity than other hot water storage tanks, and by disposing the components that make up the hot water supply circuit in front of the smaller hot water storage tank, the space between the hot water supply circuit components is widened. In addition to improving the maintainability when removing each part, a hot water supply circuit can be arranged in front of the hot water storage tank to reduce the thickness of the main body, greatly improving workability and installation. Can be achieved .

(Embodiment 1)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments. FIG. 1 is a circuit configuration diagram of a heat pump water heater in the first embodiment of the present invention.

  The heat pump water heater of the present embodiment is configured by integrally storing a refrigerant circulation circuit and a hot water supply circuit in the main unit 1. This refrigerant circulation circuit is arranged in series with a vertically mounted compressor 2 disposed inside the main unit 1, a hot water supply water-refrigerant heat exchanger 3 that is a radiator, and a hot water supply water-refrigerant heat exchanger 3. A water heat / refrigerant heat exchanger 4 for bath warming and cooking, which is also a radiator, a decompression means 5 comprising, for example, an electric expansion valve, and an evaporator 6 comprising an evaporator comprising an L-shaped air heat exchanger, Are connected by a refrigerant pipe 7. In addition, a blower fan 8 is provided to apply wind to the evaporator 6 to increase the evaporation capability.

  On the other hand, the hot water supply circuit exchanges heat with the radiator 3 to convert hot water into hot water-refrigerant heat exchanger 9 (for example, heat exchange with a double tube structure integrated with the radiator 3). ), A hot water storage tank 10 for storing hot water obtained by the hot water-refrigerant heat exchanger 9, a hot water storage tank 10, a water inlet pipe 11 for introducing tap water into the hot water supply water-refrigerant heat exchanger 9, and a hot water storage tank 10. And hot water from a hot water supply / refrigerant heat exchanger 9 to a hot water supply terminal of the faucet 12 and bath 13, a hot water circulating water pump 15 for supplying low temperature water in the hot water storage tank 10, and the bath 13. In order to heat or reheat the hot water that is being circulated, the hot water of the bath is circulated and heated, and the hot water of the bath connected to the additional hot water pipe 16 is further heated. Additional cooking water-refrigerant heat exchanger 17 (for example A heat exchanger) of the double tube structure is integral shape and the radiator 4, and a bath circulation water pump 18 for circulating the bath hot water.

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

  The tank inlet pipe 19 is a pipe that sends tap water from the inlet pipe 11 to the hot water storage tank 10, and a tank inlet check valve 20 is provided on the way. The tap water supply pipe 21 is a pipe that directly supplies tap water from the water inlet pipe 11 to the hot water supply / refrigerant heat exchanger 9, and the tap water supply pipe 21 is provided with a check valve 22. The heat exchange water supply pipe 23 is a pipe that sends the low temperature water stored in the hot water storage tank 10 downward from the hot water storage tank 10 to the hot water supply water-refrigerant heat exchanger 9 by the operation of the hot water circulation water pump 15. Is a pipe for sending hot water heated by the hot water supply-refrigerant heat exchanger 9 to the hot water storage tank 10 and the original mixing valve 25. A hot water storage three-way valve 26 is provided in the middle of the hot water storage tank side pipe 24a, and the original mixing valve side. A check valve A27 is provided in the middle of the pipe 24b.

  The tank hot water supply pipe 28 is a pipe for supplying hot water (usually 60 ° C. to 90 ° C.) from the hot water storage tank 10 to the original mixing valve 25, and the original mixing valve 25 is connected to the hot water storage pipe 24 (original mixing valve side pipe). 24b) and the hot water or water coming from the tank hot water pipe 28 are mixed, and the check valve A27 is a valve provided in front of the original mixing valve 25. Further, the hot water mixing valve 29 is a valve that supplies the faucet 12 to mix hot water that has passed through the original mixing valve 25 and tap water supplied from the inlet pipe 11 to obtain an appropriate hot water temperature. A check valve B29b for preventing a backflow is provided between the valve 29 and the water inlet pipe 11. Then, hot water that has reached the optimum temperature in the hot water supply mixing valve 29 is poured into the faucet 12 and the bath 13 through the hot water supply pipe 14.

  30 is a bath pouring mixing valve, which mixes hot water that has passed through the original mixing valve 25 and tap water supplied from the inlet pipe 11 to obtain an appropriate hot water supply temperature, Yes, a check valve C30b for preventing backflow is provided between the hot water pouring hot water mixing valve 30 and the inlet pipe 11. The hot water that has reached the optimum temperature in the bath pouring mixing valve 30 passes through the bath pouring pipe 31, passes through the backflow prevention valve 32, passes through the bath three-way valve 33, and passes through the bath additional cooking pipe 16. 13 is poured. Further, the incoming water flow meter 34 is an instrument that measures the incoming water flow rate, and the hot water supply flow meter 35 is an instrument that measures the hot water flow rate. The drain valve 36 is a valve used for draining water in the tank to prevent freezing or the like when it is not used for a long time in a cold region or the like, and the control valve 37 is a valve for controlling the incoming water flow rate.

  Furthermore, the cycle for bath warming additional cooking will be described. The bath heat-warming water-refrigerant heat exchanger 4 is disposed on the downstream side as viewed from the compressor of the hot-water supply water-refrigerant heat exchanger 3 connected in series in the refrigeration cycle. Reference numeral 38 denotes a bath inlet pipe that inputs hot water from the bath 13 by driving the bath circulating water pump 18. The bath hot water that has entered from the bath inlet pipe 38 is supplied to the bath warming and reheating water-refrigerant heat exchanger 17. It is heated and passes through the additional cooking tube 16 again and returned to the bath 13 to perform a heat insulation operation for keeping the temperature of the bath constant, or an additional cooking operation for raising the hot water temperature without adding the amount of hot water in the bath. Further, the control device 39 detects the refrigerant temperature on the high pressure side of the refrigerant circulation circuit, determines the rising state of the refrigerant circulation circuit from the level of the temperature, and controls the opening degree of the original mixing valve 25 and the hot water supply mixing valve 29. Means.

  Next, the arrangement configuration of each element of the refrigerant circulation circuit and the hot water supply circuit that are integrally stored in the main unit 1 will be described with reference to FIGS. 2 and 3.

  FIG. 2 is a front interior view of the heat pump water heater shown in FIG. 1, and is a perspective view of the main unit 1 cut vertically and viewed from the front.

  On the left side of the main unit 1, a vertically placed compressor 2, which is a refrigerant circulation circuit, a radiator 3 (hot-water supply water-refrigerant heat exchanger 9), and a radiator 3 (hot-water supply water-refrigerant heat exchange). The radiator 9) The radiator 4 (water for hot water / refrigerant heat exchanger 17), which has been downsized from the radiator 3 (water for hot water supply-refrigerant heat exchanger 9), and the expansion valve 5 as decompression means, An evaporator 6 composed of an L-shaped air heat exchanger, which is an evaporator, is connected and arranged in an annular shape. Moreover, the ventilation fan 8 for raising the evaporation capability of the evaporator 6 which consists of an air heat exchanger is also distribute | arranged to the left. A hot water circulating water pump 15 and a bath circulating water pump 18 are disposed below the blower fan 8.

Above the radiator 3 (hot-water supply water-refrigerant heat exchanger 9) is an intermediate substrate 41, and the evaporator 6 composed of the air heat exchanger is disposed on the intermediate substrate 41. Above the intermediate substrate 41, there is a box-shaped sheet metal 42 so as to be approximately the same height in the horizontal direction as below the evaporator 6, which is an air heat exchanger, and the radiator 4 (bath warming and cooking water-refrigerant). The heat exchanger 17) is arranged below the box-shaped sheet metal 42. The box-shaped sheet metal 42 has an R-shaped upper corner so that the wind flow from the evaporator 6 flows smoothly. Further, since the evaporator 6 is L-shaped, the radiator 4 (water for bath warming / refrigerant heat exchanger 17) is disposed inside the evaporator 6 via a box-shaped sheet metal 42. It becomes the shape that has been installed.

  A hot water circulating water pump 15 is disposed above the box-shaped sheet metal 42, a pump cover sheet metal 43 is disposed above the box-shaped sheet metal 42, and a bath circulating water pump 18 is disposed above the pump cover sheet metal 43. . The position where the bath circulating water pump 18 is installed is the lower right side of the blower fan 8 and is a position that does not affect the blower fan 8.

  Parts constituting the hot water supply circuit are arranged on the right side of the main unit 1. The hot water storage tank 10 is disposed on the right side of the evaporator 6 including the air heat exchanger and the compressor 2 (that is, on the other side of the main unit 1). The water inlet pipe 11 and the hot water supply pipe 14 are arranged in front of the hot water storage tank 10. Reference numeral 44 denotes a base substrate on which these components are placed. In front of the hot water storage tank 10, hot water supply circuits such as a tank inlet pipe 19, an original mixing valve 25, a hot water supply mixing valve 29, a bath pouring mixing valve 30, a bath backflow prevention valve 32, and a bath three-way valve 33 are also arranged.

  FIG. 3 is a plan view of the heat pump water heater shown in FIG. 1, and is a perspective view of the main unit 1 shown in FIG.

  FIG. 3 (c) is a perspective view cut along the XX arrow below, and shows the compressor 2, the radiator 3 (water-refrigerant heat exchanger 9), and the radiator 4 (bath) constituting the refrigerant circulation circuit. The evaporator 6 composed of the heat-retaining water-refrigerant heat exchanger 17), the expansion valve 5 and the air heat exchanger is arranged on the left side of the main body. The radiator 3 (water-refrigerant heat exchanger 9) is wound in a central shape, and the pipe length is increased while keeping the overall height as low as possible. Similarly, the radiator 4 (bath heat-reserving hot water-refrigerant heat exchanger 17) is also wound like a bowl.

  Although the hot water storage tank 10 constituting the hot water supply circuit is placed on the base substrate 44 on the right side of the main body, the hot water storage tank 10 protrudes to the rear of the main body unit 1, and the outer part of that portion has a swollen portion 1 a that is swollen outward. Provided. The water intake pipe 11, the hot water supply pipe 14, the bath additional cooking pipe 16, and the bath water intake pipe 38 are arranged in front of the main unit 1 and in front of the hot water storage tank 10, where piping connection is performed during construction.

  FIG. 3 (b) is a perspective view cut from substantially the center Y-Y direction and viewed from above. The vertical compressor 2, the evaporator 6, the bath circulating water pump 18, the intermediate substrate 41, A box-shaped sheet metal 42 and the like are shown. The evaporator 6 composed of an L-shaped air heat exchanger is disposed above an L-shaped intermediate substrate 41 disposed above the radiator 3 (hot-water supply water-refrigerant heat exchanger 9). A box-shaped sheet metal 42 is disposed inside the evaporator 6 composed of a heat exchanger, and a radiator 4 (bath warming / heating water-refrigerant heat exchanger 17) is disposed below the box-shaped metal plate 42. A bath circulating water pump 18 is disposed above the box-shaped sheet metal 42.

  Further, the evaporator 6 formed of an air heat exchanger has an L shape and extends to the vicinity of the hot water storage tank 10. The intermediate substrate 41 is provided with a water drain hole 41a so that the condensed water of the evaporator 6 composed of an air heat exchanger is drained. Therefore, the intermediate substrate 14 is inclined by 1 to 2 degrees toward the drain hole 41a, and drains out of the main unit 1. The finishing plate 45 divides the compressor 2, the hot water supply circulating water pump 15, and the hot water storage tank 10. Hot water supply circuit components such as the original mixing valve 25 and the hot water supply mixing valve 29 are arranged in front of the hot water storage tank 10.

FIG. 3A is a perspective view of the main unit 1 cut along the ZZ arrow above and viewed from above. A pump cover sheet metal 43 is disposed above the box-shaped sheet metal 42 , and a blower fan mounting bracket 8a is mounted on the pump cover sheet metal 43, a blower motor 8b is mounted on the blower fan mounting bracket 8a, and the blower motor 8b A blower fan 8 is attached. A bell mouth 46 is provided in the main unit 1 in order to rotate the blower fan 8 to increase the evaporation capability and the blower capability of the evaporator 6. A hot water supply circulating water pump 15 is arranged at the lower right and lower side of the bell mouth 46.

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

  When the compressor 2 is operated, the refrigerant compressed and discharged to a high pressure is sent to the radiator 3 (water-refrigerant heat exchanger 9) to exchange heat with tap water that has passed through the tap water supply pipe 21. Dissipate heat. Thereby, the tap water flowing through the hot water storage pipe 24 and the original mixing valve 25 is heated to a high temperature. The refrigerant flowing out of the radiator 3 (water-refrigerant heat exchanger 9) is decompressed and expanded by the decompression means 5, sent to the evaporator 6, and exchanges heat with the air sent by the blower fan 8 to evaporate. While passing through the vessel 6, it evaporates and gasifies. The gasified refrigerant is again sucked into the compressor 2 and is repeatedly compressed. The gradually heated tap water is supplied with hot water through the hot water supply pipe 30, the hot water supply pipe 14, and the faucet 12. Alternatively, the hot water is poured into the bath 13 through the bath pouring pipe 31, the bath three-way valve 33, and the bath additional cooking pipe 16.

At that time, since the rising of the refrigerant cycle is slow and the hot water property is inferior, the hot water storage tank 10 compensates for the poor rising. That is, until the refrigerant cycle starts and reaches a predetermined hot water supply temperature, the hot water that has passed through the tank hot water supply pipe 28 from the hot water storage tank 10 kept at a high temperature and the hot water supply / refrigerant heat exchanger 9 that has not yet started up. Water that has passed through the water (water that gradually rises in temperature and becomes high temperature) is mixed by the original mixing valve 25, and further tap water that has passed through the inlet pipe 11 by the hot water mixing valve 29 or the bath pouring mixing valve 30. And then hot water supply or pouring at the temperature desired by the user.

  Next, when the refrigerant circulation circuit comes up, the opening degree of the original mixing valve 25 is adjusted, and hot water from the hot water storage tank 10 and hot water from the radiator 3 (hot water supply water-refrigerant heat exchanger 9) are appropriately heated. Then, the mixture is fed to the hot water supply mixing valve 29 or the bath pouring mixing valve 30 and mixed with the tap water that has passed through the water inlet pipe 11 to supply hot water or hot water.

Finally, hot water that has passed through the tank hot water supply pipe 28 from the hot water storage tank 10 is not used, and tap water that has passed through the tap water supply pipe 21 is heated by the hot water / refrigerant heat exchanger 9 in the refrigerant cycle. The hot water and tap water that has passed through the inlet pipe 11 are mixed by the hot water mixing valve 29 or the bath pouring mixing valve 30 to perform hot water supply at a predetermined temperature. That is, the control device 39 grasps the rising state of the refrigerant cycle, adjusts the opening degree of the original mixing valve 25 , the hot water supply mixing valve 29, and the bath pouring mixing valve 30, and supplies hot water of a predetermined temperature to the hot water supply terminal. Control is performed.

Further, when the user closes the faucet 12 or when it is not necessary to supply or pour hot water because an appropriate amount of hot water has accumulated in the bath 13, the hot water circulating water pump 15 is driven and the hot water storage three-way valve 26 controls the temperature. When the temperature is low, hot water is stored in the hot water tank lower pipe 26b below the hot water tank 10, and when the temperature rises, hot hot water is stored in the hot water tank 10 from the hot water tank side pipe 24a for the next hot water supply operation. Hot water storage operation is performed.

  Thus, according to the rising state of the refrigerant cycle, the hot water stored in the hot water storage tank 10 was used to supply hot water to the hot water supply terminal, or the hot water supply water-refrigerant heat exchanger 9 was used for heating without using the hot water storage tank 10. It is set as the structure which can supply hot water directly to a 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 10 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.

  The tap water heated by the so-called hot water supply-refrigerant heat exchanger 9 is supplied to the hot water storage tank 10 and directly passes through the hot water supply terminal without passing through the hot water storage tank 10. -The tap water heated by the refrigerant heat exchanger 9 can supply hot water to the hot water storage tank 10 and, on the other hand, is directly passed to a hot water supply terminal such as a faucet or shower without passing through the hot water storage tank. It is possible to provide a heat pump water heater that has excellent properties, is easy to use, and does not worry about running out of hot water.

  The tap water flowing through the hot water storage pipe 24 and the original mixing valve 25 is heated to a high temperature. The refrigerant flowing out of the radiator 3 (water-refrigerant heat exchanger 9) is decompressed and expanded by the decompression means 5, sent to the evaporator 6, and exchanges heat with the air sent by the blower fan 8 to evaporate. While passing through the vessel 6, it evaporates and gasifies. The gasified refrigerant is again sucked into the compressor 2 and is repeatedly compressed. The gradually heated tap water is a hot water supply pipe 14, a bath pouring pipe 31, a faucet 12, and a bath cooking pipe 16. The hot water is poured into the bath 13. Moreover, if the hot water temperature of the bath 13 falls, a heat retaining operation or a supplementary cooking operation is performed. In the heat insulation operation, when it is detected that the temperature of the hot water in the bath 13 has decreased, the bath circulating water pump 18 operates to send the hot water in the bath 13 to the radiator 4 (bath warming / heating water-refrigerant heat exchanger 17). The refrigerant that has been compressed and discharged to a high pressure by operating the compressor 2 is sent to the radiator 4 (bath warming / heating water-refrigerant heat exchanger 17), and the refrigerant of the bath 13 that has passed through the bath circulation water pump 18 is sent to the radiator 4. Heat exchange with hot water to dissipate heat.

  As a result, the hot water is heated, and the warming operation is performed by returning to the bath 13 through the bath additional cooking tube 16. When the temperature of the hot water in the bath 13 is remarkably lowered and it is desired to increase the temperature of the hot water without pouring, additional cooking operation is performed. This is also the same, and the bath circulating water pump 18 operates to send the hot water of the bath 13 to the radiator 4 (bath warming / heating water-refrigerant heat exchanger 17). The refrigerant that has been compressed and discharged to a high pressure by operating the compressor 2 is sent to the radiator 4 (bath warming / heating water-refrigerant heat exchanger 17), and the refrigerant of the bath 13 that has passed through the bath circulation water pump 18 is sent to the radiator 4. Heat exchange with hot water to dissipate heat. As a result, the hot water in the bath is heated and passed through the bath additional cooking pipe 16 and returned to the bath 13 to perform additional cooking operation. In this case, the bath three-way valve 33 is switched so as to flow to the radiator 4 (bath heat retention and cooking water-refrigerant heat exchanger 17), unlike the case of pouring into the bath.

  In the heat pump water heater of the present embodiment, the compressor 2, the water heating water-refrigerant heat exchanger 3 that is a radiator, and the water-refrigerant heat exchanger 4 for bath warming and cooking that is also a radiator are included in the heat pump water heater of the present embodiment. , An electric expansion valve 5, an evaporator 6 composed of an air heat exchanger, and a blower fan 8 for enhancing the evaporation capacity are arranged on the left side of the main unit 1, and components constituting a hot water supply circuit on the right side of the main unit The hot water storage tank 10, the water inlet pipe 11, the hot water supply pipe 14, the bath additional cooking pipe 16, the bath water inlet pipe 38, the tank water inlet pipe 19, the original mixing valve 25, the hot water supply mixing valve 29, the bath pouring mixing valve 30, and the bath backflow prevention By arranging the valve 32, the bath three-way valve 33, and the bath water inlet pipe 38, the refrigerant circulation circuit and the hot water supply circuit can be separated structurally, and the width of the main unit can be reduced. Drastically reduce Door can be, degree of freedom of installation is greatly improved. In particular, it is equipped with a hot water storage tank, and this hot water storage tank is arranged on the right side, and the compressor, water-refrigerant heat exchanger, and water pump are arranged on the left side. Even without this, the capacity of the hot water storage tank can be increased.

Furthermore, in order to increase the heat pump capacity and perform hot water supply operation with the operation of the heat pump alone without going through the hot water storage tank, it extends upward to increase the area of the evaporator as an air heat exchanger. However, the installation area can be kept completely unchanged, the capacity of the hot water storage tank can be increased in the height direction, and the usability can be improved while improving the degree of freedom of installation. In addition, the refrigerant circulation circuit and the hot water supply circuit are divided into left and right parts, so there is no need to touch the other circulation circuits when maintaining each circulation circuit, and maintenance man-hours can be greatly reduced and maintenance work can be greatly reduced. Workability is greatly improved by eliminating mistakes.

Furthermore, the compressor and water - Ri particular good to distribution in the same compartment of the refrigerant heat exchanger, together with the waterproof-related parts is not necessary, it becomes possible to shorten the pipe length, the heat loss in piping channel It is possible to improve the efficiency and reduce the cost. In addition, by arranging the hot water supply circuit in front of the hot water tank and arranging the hot water tank and the hot water supply circuit in the same compartment, the length of the hot water supply circuit can be shortened, and the flow resistance can be reduced. The effect of being able to provide an instantaneous water heater type heat pump water heater that can increase the flow rate during water heater operation sufficiently, improve performance, have a wide capacity range and excellent controllability at low cost. Play.

  Moreover, in the heat pump water heater of 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.

(Embodiment 2)
FIG. 4 shows a heat pump water heater according to the second embodiment of the present invention, and is a front interior view and an external view of the heat pump water heater according to the second embodiment of the present invention. Note that the present invention is not limited to the embodiments.

  The refrigerant circulation circuit and the hot water supply circuit are the same as those in the first embodiment, and the operation is also the same. Compressor 2, radiator 3 (water supply water-refrigerant heat exchanger 9), radiator 4 (bath warming water-refrigerant heat exchanger 17), expansion valve 5, air heat exchanger, constituting the refrigerant circulation circuit In front of the evaporator 6 is a refrigerant circuit side front plate 47. A bell mouth 46 is integrated with the refrigerant circuit side front plate, and a fan guard 47 a is provided in front of the bell mouth 46. On the other hand, the hot water storage tank 10, the incoming water pipe 11, the hot water supply pipe 14, the bath additional cooking pipe 16, the bath incoming water pipe 38, the tank incoming water pipe 19, the original mixing valve 25, the hot water supply mixing valve 29, and the bath pouring mixture constituting the hot water supply circuit. There is a hot water supply circuit side front plate 48 in front of the hot water supply circuit such as the valve 30, the bath backflow prevention valve 32, the bath three-way valve 33, and the bath water inlet pipe 38. The refrigerant circuit side front plate 47 and the hot water supply circuit side front plate 48 are It is different.

  Thereby, when maintaining the hot water supply circuit, for example, when the original mixing valve 25 is replaced, the refrigerant circulation circuit is not touched. Conversely, when maintaining the refrigerant circulation circuit, for example, the expansion valve 5 For example, when the coil is replaced, the hot water supply circuit is not touched, so that erroneous work during maintenance can be prevented, and maintenance can be greatly improved.

  In addition, when maintaining the hot water supply circuit, the water inside the piping does not fall and it does not fall on the components of the refrigerant circulation circuit, and there is no problem with insulation during re-operation. Maintenance becomes possible.

In addition, since the water intake pipe 11, the hot water supply pipe 14, the bath additional cooking pipe 16, and the bath water intake pipe 38 are concentrated on the left side during the construction, connection piping work can be performed by removing the hot water supply circuit side front plate 48. ,
Construction is easier.

(Embodiment 3)
FIG. 5 shows a heat pump water heater according to a third embodiment of the present invention, and is a front view and a plan view of a heat pump water heater according to the third embodiment of the present invention. FIG. 6 shows the present invention. It is a circuit block diagram of the heat pump water heater in 3rd Embodiment. Note that the present invention is not limited to the embodiments. Further, the plan view in FIG. 5 is a perspective view cut from the center AA arrow of the front view and viewed from above.

  5 and 6, the part numbers are the same as those in the first embodiment. However, in the third embodiment, the second hot water storage tank 49 is arranged on the right side of the hot water storage tank 10. A tank connection pipe 50 connecting the hot water storage tank 10 and the second hot water storage tank 49 connects the lower side of the second hot water storage tank 49 and the upper side of the hot water storage tank 10. In the first embodiment, the hot water storage tank 10 and the hot water storage three-way plate 26 are connected to the hot water storage tank side pipe 24a, which connects the second hot water storage tank 49 and the hot water storage three-way valve 26, and the hot water storage tank lower pipe 26b is used. As in the first embodiment, the hot water storage three-way valve 26 and the hot water storage tank 10 are connected.

  Also in this example in which the hot water storage tank 10 and the second hot water storage tank 49 are provided, the operation is the same as in the first embodiment, and the tanks from the hot water storage tank 10 and the second hot water storage tank 49 are changed until the refrigerant circulation circuit is started. Hot water that has passed through the hot water supply pipe 28 and hot water that has not yet risen—water that has passed through the refrigerant heat exchanger 9 (water that gradually rises in temperature and becomes high temperature) are mixed by the original mixing valve 25, and The hot water mixing valve 29 or the bath pouring mixing valve 30 is mixed with tap water that has passed through the inlet pipe 11 to perform hot water supply or pouring at a temperature desired by the user.

  Next, when the refrigerant circulation circuit comes up, the opening degree of the original mixing valve 25 is adjusted, the hot water from the hot water storage tank 10 and the second hot water storage tank 49, and the radiator 3 (hot water supply water-refrigerant heat exchanger). The hot water from 9) is mixed at an appropriate temperature, sent to the hot water supply mixing valve 29 or the bath pouring mixing valve 30, and mixed with tap water that has passed through the water inlet pipe 11 to supply hot water or hot water.

  At this time, by providing the hot water storage tank 10 and the second hot water storage tank 49 and increasing the amount of hot water storage, it is possible to lengthen the time for discharging hot hot water from the hot water storage tank 10 and the second hot water storage tank 49. Therefore, there is an advantage that hot water can be supplied without running out of hot water even if the temperature is low and the refrigerant circulation circuit does not start up easily in cold districts.

  Further, in the heat pump water heater of the present embodiment, the compressor 2, which constitutes the refrigerant circulation circuit, the hot water supply water-refrigerant heat exchanger 3 that is a radiator, and the water-refrigerant heat exchange for bath warming and cooking that is also a radiator. 4, an electric expansion valve 5, an evaporator 6 composed of an air heat exchanger, and a blower fan 8 for increasing the evaporation capacity are arranged on the left side of the main unit 1, and a hot water supply circuit is formed in the center of the main unit. As parts, a hot water storage tank 10, a water inlet pipe 11, a hot water supply pipe 14, a bath additional cooking pipe 16, a bath water inlet pipe 38, a tank water inlet pipe 19, an original mixing valve 25, a hot water mixing valve 29, a bath pouring mixing valve 30, a bath backflow The prevention valve 32, the bath three-way valve 33, and the bath water intake pipe 38 are arranged, and the second hot water storage tank 49 and the tank connection pipe 50 are arranged on the right side of the main unit 1, so that a refrigerant circulation circuit and a hot water supply circuit are provided. Can be separated from each other Next, it makes it possible to narrow the width of the main unit, it is possible to reduce the footprint greatly, degree of freedom of installation is greatly improved.

In addition, the refrigerant circulation circuit and the hot water supply circuit are arranged separately on the left and right, and the water circulation circuit is not arranged in front of the second hot water storage tank, so that it is necessary to touch the other circulation circuits when maintaining each circulation circuit. As a result, the number of maintenance man-hours can be greatly reduced, and workability is greatly improved, such as no mistakes during maintenance. Furthermore, the compressor and water - Ri particular good to distribution in the same compartment of the refrigerant heat exchanger, together with the waterproof-related parts is not necessary, it becomes possible to shorten the pipe length, the heat loss in piping channel It is possible to improve the efficiency and reduce the cost.

  In addition, by arranging the hot water supply circuit in front of the hot water tank and arranging the hot water tank and the hot water supply circuit in the same compartment, the length of the hot water supply circuit can be shortened, and the flow resistance can be reduced. The effect of being able to provide an instantaneous water heater type heat pump water heater that can increase the flow rate during water heater operation sufficiently, improve performance, have a wide capacity range and excellent controllability at low cost. Play. Further, in this example, an example in which the hot water storage tank 10 and the second hot water storage tank 49 are provided is shown, but the same is true if a plurality of third and fourth hot water storage tanks are provided.

(Embodiment 4)
FIG. 7 shows a heat pump water heater according to the fourth embodiment of the present invention, and is a front view and an external view of the heat pump water heater according to the fourth embodiment of the present invention. In addition, this invention is not limited by this embodiment.

  The refrigerant circulation circuit and the hot water supply circuit are the same as those in the third embodiment, and the operation is also the same. Compressor 2, radiator 3 (water supply water-refrigerant heat exchanger 9), radiator 4 (bath warming water-refrigerant heat exchanger 17), expansion valve 5, air heat exchanger, constituting the refrigerant circulation circuit In front of the evaporator 6 is a refrigerant circuit side front plate 47. A bell mouth 46 is integrated with the refrigerant circuit side front plate, and a fan guard 47 a is provided in front of the bell mouth 46. On the other hand, the hot water storage tank 10, the incoming water pipe 11, the hot water supply pipe 14, the bath additional cooking pipe 16, the bath incoming water pipe 38, the tank incoming water pipe 19, the original mixing valve 25, the hot water supply mixing valve 29, and the bath pouring mixture constituting the hot water supply circuit. There is a hot water supply circuit side front plate 48 in front of the hot water supply circuit such as the valve 30, the bath backflow prevention valve 32, the bath three-way valve 33, and the bath water inlet pipe 38. There is a tank front plate 51 in front of the second hot water storage tank 49, and the refrigerant circuit side front plate 47, the hot water supply circuit side front plate 48, and the hot water storage tank front plate 51 are separated.

  Thereby, when maintaining the hot water supply circuit, for example, when the original mixing valve 25 is replaced, the refrigerant circulation circuit is not touched. Conversely, when maintaining the refrigerant circulation circuit, for example, the expansion valve 5 For example, when the coil is replaced, the hot water supply circuit is not touched, so that erroneous work during maintenance can be prevented, and maintenance can be greatly improved.

  In addition, when maintaining the hot water supply circuit, the water inside the piping does not fall and it does not fall on the components of the refrigerant circulation circuit, and there is no problem with insulation during re-operation. Maintenance becomes possible. Further, by separating the hot water supply circuit side front plate 48 and the hot water storage tank front plate 51, the hot water supply circuit side front plate 48 can be made compact and can be easily attached and detached during disassembly. In particular, when the main unit 1 is installed on a balcony of an apartment, the space is narrow and the work is difficult to perform. However, the workability can be improved by making the hot water supply circuit side front plate 48 compact.

  Further, in this example, an example in which the hot water storage tank 10 and the second hot water storage tank 49 are provided is shown, but the same is true if a plurality of third and fourth hot water storage tanks are provided.

(Embodiment 5)
FIG. 8 shows a heat pump water heater according to a fifth embodiment of the present invention, and is a plan view of the heat pump water heater according to the fifth embodiment of the present invention. It is the perspective view seen from. Note that the present invention is not limited to the embodiments.

The refrigerant circulation circuit and the hot water supply circuit are the same as those in the third embodiment, and the operation is also the same. Compressor 2, radiator 3 (water supply water-refrigerant heat exchanger 9), radiator 4 (bath warming water-refrigerant heat exchanger 17), expansion valve 5, air heat exchanger, constituting the refrigerant circulation circuit The evaporator 6 is arranged on the left side of the main unit 1, and in the center of the main unit 1, a hot water storage tank 10, a water inlet pipe 11, a hot water pipe 14, a bath cooking pipe 16, and a bath A water pipe 38, a tank water inlet pipe 19, an original mixing valve 25, a hot water supply mixing valve 29, a bath pouring mixing valve 30, a bath backflow prevention valve 32, a bath three-way valve 33, and a bath water inlet pipe 38 are arranged on the right side of the main unit 1. Has a second hot water storage tank 49. The hot water storage tank 10 has a larger capacity and a larger diameter than the second hot water storage tank 49.

  As a result, the hot water storage tank capacity when the refrigerant circulation circuit and the hot water supply circuit are configured by one hot water storage tank 10 can be ensured, and the main body can be shared with and without other hot water storage tanks. It is possible to reduce the mold investment as much as possible for a plurality of types of main bodies (one hot water storage tank, two hot water storage tanks, and three or more hot water storage tanks).

Further, as can be seen from the circuit configuration diagram of the third embodiment, below the hot water storage tank 10, three pipes, that is, a tank inlet test pipe 19, a heat exchange water supply pipe 23, and a hot water storage tank lower pipe 26 b are connected. In particular, when hot water entering the hot water storage tank 10 from the hot water storage tank lower pipe 26 b heated by the hot water supply water-refrigerant heat exchanger 9 flows into the heat exchange water supply pipe 23 as it is, hot water supply water-refrigerant heat. rising input water temperature of the exchanger 9, intends heat交率deteriorates Teshima. In order to prevent this, it is desirable to separate the heat exchange water supply pipe 23 and the hot water storage tank lower pipe 26b below the hot water storage tank 10 as much as possible. At that time, it is effective to increase the capacity of the hot water storage tank 10, and in this case, the height is determined, so that it is effective to increase the diameter of the hot water storage tank.

(Embodiment 6)
FIG. 9 shows a heat pump water heater according to a sixth embodiment of the present invention, and is a plan view of the heat pump water heater according to the sixth embodiment of the present invention. It is the perspective view seen from. In addition, this invention is not limited by this embodiment.

  The refrigerant circulation circuit and the hot water supply circuit are the same as those in the third embodiment, and the operation is also the same. Compressor 2, radiator 3 (water supply water-refrigerant heat exchanger 9), radiator 4 (bath warming water-refrigerant heat exchanger 17), expansion valve 5, air heat exchanger, constituting the refrigerant circulation circuit The evaporator 6 is arranged on the left side of the main unit 1, and in the center of the main unit 1, a hot water storage tank 10, a water inlet pipe 11, a hot water pipe 14, a bath cooking pipe 16, and a bath A water pipe 38, a tank water inlet pipe 19, an original mixing valve 25, a hot water supply mixing valve 29, a bath pouring mixing valve 30, a bath backflow prevention valve 32, a bath three-way valve 33, and a bath water inlet pipe 38 are arranged on the right side of the main unit 1. Has a second hot water storage tank 49. The hot water storage tank 10 is a tank having a smaller capacity and a smaller diameter than the second hot water storage tank 49.

  Accordingly, by arranging the hot water supply circuit in front of the hot water storage tank smaller than the others, the interval between the hot water supply circuit parts can be widened, and the maintainability when removing each part is improved, and the hot water storage tank 10 A hot water supply circuit can be arranged in the front to reduce the thickness of the main body, and the workability and installation can be greatly improved.

  As described above, the present invention is applied to a heat pump water heater that generates and supplies hot water in a heat pump cycle, and is useful, for example, for an instantaneous water heater for home use or a hot water supply device for business use.

The circuit block diagram of the heat pump water heater in the 1st Embodiment of this invention Front view of the heat pump water heater shown in FIG. (A) ZZ sectional view of FIG. 2 (b) YY sectional view of FIG. 2 (c) XX sectional view of FIG. (A) Front view of the heat pump water heater in the second embodiment of the present invention (b) Front external view of the heat pump water heater (A) Plane interior view of a heat pump water heater in the third embodiment of the present invention (b) Front interior view of the heat pump water heater Circuit diagram of the heat pump water heater (A) Front view of a heat pump water heater in the fourth embodiment of the present invention (b) Front external view of the heat pump water heater Plan internal view of the heat pump water heater in the fifth embodiment of the present invention Plane interior view of a heat pump water heater in the sixth embodiment of the present invention Circuit diagram of a conventional heat pump water heater Front view of the heat pump water heater (heat pump unit) of FIG. Plan view of the heat pump water heater (heat pump unit) of FIG. Circuit diagram of another conventional heat pump water heater Schematic configuration diagram of the heat pump water heater of FIG. Three-dimensional interior view of the heat pump water heater of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body unit 2 Compressor 3 Heat radiator (Water for hot water supply-refrigerant heat exchanger)
4 radiator (bath water-refrigerant heat exchanger)
DESCRIPTION OF SYMBOLS 5 Pressure reduction means 6 Evaporator 7 Refrigerant circulation circuit 8 Blower fan 9 Hot-water supply water-refrigerant heat exchanger 10 Hot water storage tank 11 Inlet pipe 12 Faucet (hot water supply terminal)
13 Bath (hot water supply terminal)
30 Hot water supply pipe 31 Hot water supply pipe 47 Refrigerant circuit side front plate 48 Hot water supply circuit side front plate 51 Hot water storage tank front plate

Claims (6)

A compressor, a radiator, a decompression means, and an evaporator are connected in order to form a closed circuit, a refrigerant circulation circuit that circulates the refrigerant, a blower fan that blows air to the evaporator, and water that exchanges heat with the radiator A refrigerant heat exchanger, a hot water storage tank for storing heated hot water, a water inlet pipe for supplying tap water to the water-refrigerant heat exchanger or the hot water storage tank, and passing the heated hot water to a hot water supply terminal. The hot water pipe connected in this way, the main unit , the intermediate board provided below the evaporator, the tank hot water pipe for sending hot water from the hot water storage tank to the hot water pipe, and the water-refrigerant heat exchanger A hot water storage pipe for sending high temperature water to the hot water storage tank, and a valve for connecting the tank hot water supply pipe and the hot water storage pipe, and the radiator and the water-refrigerant heat exchanger are below the intermediate substrate and When placed in the same compartment as the compressor In the said blowing fan and the refrigerant circuit water - a refrigerant heat exchanger is disposed on one side in the main unit, the entering-water pipe and the hot water storage tank and the hot water supply pipe in the main unit The hot water in the hot water storage tank is heated by the water-refrigerant heat exchanger without passing through the hot water storage tank and the hot water in the hot water storage tank by adjusting the opening of the valve. A hot- pump water heater that can directly supply hot water to the hot-water supply terminal and uses carbon dioxide as a refrigerant . A hot water supply circuit having a water inlet pipe and hot water supply pipe, and a front plate constituting a front side of the main unit, the front plate, the refrigerant circulation circuit between the blower fan and water - are disposed in the refrigerant heat exchanger side The heat pump water heater according to claim 1, wherein the refrigerant circuit side front plate and the hot water supply circuit side front plate disposed on the hot water supply circuit side are configured separately. A hot water supply circuit having a water inlet pipe and a hot water supply pipe is provided, and a plurality of hot water storage tanks are arranged on one side of the main unit and on the side of the refrigerant circulation circuit, and others. while disposed in front of the hot water storage tank on the side of the refrigerant circulation circuit, wherein the front of the hot water storage tank, and configured to arrange a connection pipe for connecting said the other of the hot water storage tank and the hot water supply circuit The heat pump water heater according to claim 1. A plurality of hot water storage tanks are provided, and a front plate constituting the front side of the main unit is provided, and the front plate has a separate hot water storage tank front plate for each of the plurality of hot water storage tanks. 2. The heat pump water heater according to 2. A hot water storage tank comprising a hot water supply circuit having a water inlet pipe and a hot water supply pipe, and having a plurality of hot water storage tanks disposed at the rear of the hot water supply circuit and others, and among the plurality of hot water storage tanks, disposed at the rear of the hot water supply circuit The heat pump water heater according to claim 1 or 3, wherein the capacity is larger than that of other hot water storage tanks. A hot water storage tank comprising a hot water supply circuit having a water inlet pipe and a hot water supply pipe, and having a plurality of hot water storage tanks disposed at the rear of the hot water supply circuit and others, and among the plurality of hot water storage tanks, disposed at the rear of the hot water supply circuit The heat pump water heater according to claim 1 or 3, wherein the capacity is smaller than that of other hot water storage tanks.

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