JP2005308249A - Heat pump water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide heat pump water heater having a reduced size, improved performance, low cost and good user-friendliness by improving the storage and maintenance properties of structural components. <P>SOLUTION: The heat pump water heater comprises a refrigerant circuit 7 having radiators 3, 4 connected to a compressor 2, an evaporator 6 and a pressure reducing means 5 each as one element, in sequence, to form a closed circuit in which refrigerant is circulated by the compressor 2, a blowing means 8 for blowing air to the evaporator 6, and a water-refrigerant heat exchanger for heat exchange with the radiators 3, 4. The water-refrigerant heat exchanger consists of a hot water supply water-refrigerant heat exchanger 9 and a bath heat retention reheating water-refrigerant heat exchanger 17. Thus, a body has a smaller size and lower cost, and eventually the heat pump water heater has improved maintenance property, reduced cost and good user-friendliness. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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.

  Therefore, a hot water storage type heat pump 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, a hot water supply cycle 51 and a refrigerant cycle 52 are provided as shown in FIG. The hot water supply cycle 51 includes a hot water storage tank 53 having a water supply port 55 provided on the bottom wall and a hot water supply port 56 provided on the upper wall, a heat exchange path 54, and a water circulation pump 57. The water circulation pump 57 is interposed in a circulation path 58 that connects the water intake port 59 and the hot water inlet 60 of the hot water storage tank 53. In addition, the refrigerant cycle 52 is configured by connecting a compressor 65, a water-refrigerant heat exchanger 66 constituting the heat exchange path 54, a pressure reducing mechanism 67, and an air heat exchanger 68 in this order through the refrigerant path 69. A refrigerant circulation circuit is provided. Furthermore, the hot water supply cycle 51 and the refrigerant cycle 52 are connected by connecting pipes 62 and 63 disposed on the outdoor side. Then, the low-temperature water supplied from the water supply port 55 and discharged to the circulation path 58 by the water circulation pump 57 is boiled by the water-refrigerant heat exchanger 66 (that is, the water heat exchange path 54) and discharged from the hot water supply port 56. (For example, refer patent document 1).

  In such a heat pump water heater, a hot water supply cycle 51 and a refrigerant cycle 52 are divided into two bodies, and a water-refrigerant heat exchanger 66 is incorporated in a unit incorporating the refrigerant cycle 52. become.

  As an example of unitizing the refrigerant cycle portion of such a 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 used for hot water supply, and an air heat exchanger 103 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 101 is mounted in one division, The inside of the ventilation circuit which is the other division Are mounted with a blower fan 106, an air heat exchanger 103 located on the back surface of the blower fan 106, and a water-refrigerant heat exchanger 102 located under the blower fan 106.

In addition, as a heat pump water heater that integrates a hot water storage tank and a refrigerant cycle, a “heat pump water heater” that is provided in a main body in which a hot water supply cycle and a refrigerant cycle are integrated has been commercialized. For example, there is a heat pump water heater as shown below (see, for example, Non-Patent Document 1).

  FIG. 7 is a circuit configuration diagram of the heat pump water heater, and FIG. 8 is a schematic configuration diagram of the heat pump water heater shown in FIG.

The heat pump water heater shown in FIG. 7 includes a refrigerant cycle composed of compressors 110 and 111, water-refrigerant heat exchangers 112 and 113, pressure reducing valves 114 and 115, evaporators 116 and 117, and fans 118 and 119 as refrigerant cycles. A hot water storage tank 120, a mixing valve 121, a solenoid valve 122, a hot water circulating water pump 123, a hot water circulating hot water circulating water pump 124, and the like. The hot water is supplied directly to 125 or the bath 126, or the hot water is supplied from the hot water supply circuit. And this heat pump water heater is comprised by the integrated type which accommodated all the refrigerant cycles and hot water supply cycles in one unit, as shown in FIG.
JP 2003-222392 A Weekly air conditioner distributor May 15, 2003 issue (VOL.24-No.896)

  However, in the configuration shown in 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. For this reason, the installation location is 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.

  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 FIG. 5 and FIG. 6, the upper part of the substrate is partitioned by a sound insulation board, a compressor is mounted on one side, and a blower fan, an air heat exchanger, and a hot water-refrigerant heat exchanger are mounted on the other side. Therefore, it becomes a long shape horizontally, and installation space is required. Furthermore, if the area of the air heat exchanger is increased in order to increase the heat pump capacity, the lateral width is increased and further installation space is required.

  In addition, since the water-refrigerant heat exchanger, the blower fan, and the air heat exchanger are located outside and the compressor is located inside, it is necessary to waterproof the refrigerant piping that connects them, leading to an increase in cost. In addition, because of the high weight as described above, the housing and condominiums themselves must have excellent load resistance in terms of construction, which increases the construction cost and makes the installation more complicated. , Had problems in terms of workability and cost.

In addition, the heat pump water heater shown in Non-Patent Document 2 is configured as an integrated type in which the refrigerant cycle and the hot water supply cycle are all housed in one unit, and a hot water supply water-refrigerant heat exchanger, The hot water / refrigerant heat exchanger for bath warming is wrapped around the hot water storage tank, but it is difficult to replace hot water / refrigerant heat exchanger, hot water for hot water / refrigerant heat exchanger, etc. There was a problem. In addition, the distance between the hot water circulating water pump and the hot water supply water-refrigerant heat exchanger, the bath circulation pump and the bath heat-warming water-refrigerant heat exchanger becomes longer,
There was also a problem that heat dissipation loss during that period increased, leading to deterioration in efficiency.

  In addition, since two compressors, an evaporator, and a decompression unit are used, the cost is increased, and the maintainability is poor.

  The present invention solves such a conventional problem, and can improve the storage and maintenance of component parts, improve the capacity while reducing the size, and reduce the cost and ease of use. The object is to provide a good heat pump water heater.

  In order to solve the above-described problems, the present invention provides a refrigerant circulation circuit that forms a closed circuit by sequentially connecting a radiator to a compressor, an evaporator, and a decompression unit of one element, respectively, and circulates a refrigerant by the compressor. And a water-refrigerant heat exchanger that exchanges heat with the radiator, and the water-refrigerant heat exchanger is a water-refrigerant heat exchanger for hot water supply, a bath warming supplement It is composed of a water-refrigerant heat exchanger, and can reduce the size of the main body, reduce the cost, improve the maintainability, and provide a heat pump water heater that is low in cost and easy to use.

  Further, the present invention provides a closed circuit by sequentially connecting a compressor, a radiator, a decompression unit, and an evaporator, a refrigerant circulation circuit that circulates a refrigerant by the compressor, and a blowing unit that blows air to the evaporator. A water-refrigerant heat exchanger that exchanges heat with the radiator, and the water-refrigerant heat exchanger includes a hot water supply water-refrigerant heat exchanger and a bath warming and cooking water-refrigerant heat exchanger. The hot water supply / refrigerant heat exchanger is disposed above the hot water supply / refrigerant heat exchanger, and the water-refrigerant heat exchanger for bath warming / heating is arranged, and the heat loss can be reduced by shortening the piping path. It is possible to maintain and maintain high thermal efficiency, and the water-refrigerant heat exchanger for hot water supply makes it possible to keep the temperature of the water-refrigerant heat exchanger for keeping warm the bath, reducing heat dissipation loss and improving the heat exchange rate. Furthermore, water for hot water supply Medium heat exchanger, bath kept add cooking water - in order to be independent housing of the refrigerant heat exchanger reducing the size of the body, it is possible to improve the maintainability, it is possible to provide a user-friendly heat pump water heater.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to aim at the storage property and maintenance property of a component, and aiming at a capability improvement, aiming at size reduction, a low-cost and easy-to-use heat pump water heater can be provided.

  According to a first aspect of the present invention, a closed circuit is formed by sequentially connecting a radiator to a compressor, an evaporator, and a decompression unit, and a refrigerant circulation circuit that circulates refrigerant by the compressor, and the evaporator It is provided with a blowing means for blowing air and a water-refrigerant heat exchanger for exchanging heat with the radiator, and the water-refrigerant heat exchanger is a hot water supply-refrigerant heat exchanger, a bath-warming water-refrigerant heat exchange. The heat pump water heater can be provided at low cost and with ease of use because the main body can be reduced in size, cost can be reduced, and maintenance can be improved.

According to a second 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 by the compressor, and a blower unit that blows air to the evaporator. A water-refrigerant heat exchanger that exchanges heat with the radiator, and the water-refrigerant heat exchanger includes a hot water supply water-refrigerant heat exchanger and a bath warming and cooking water-refrigerant heat exchanger. The hot water supply water-refrigerant heat exchanger is provided with the bath heat-warming water-refrigerant heat exchanger, the hot water water-refrigerant heat exchanger and the bath heat-warming water- By arranging the refrigerant heat exchangers at the top and bottom, it is possible to reduce the heat dissipation loss by enabling the piping path to be shortened, so that the heat efficiency can be maintained and maintained at a high level, and water-refrigerant heat exchange for hot water supply Water for bath warming Because the heat of the refrigerant heat exchanger can be maintained, heat dissipation loss can be reduced, the heat exchange rate can be improved, and the water-refrigerant heat exchanger for hot water supply and the water-refrigerant heat exchanger for bath warming and cooking can be stored independently. The main body can be downsized and maintainability can be improved.

  According to a third aspect of the present invention, an L-shaped evaporator is disposed above the hot water supply water-refrigerant heat exchanger via an intermediate substrate, and the hot water supply water-refrigerant heat exchanger is disposed inside the evaporator. The water-refrigerant heat exchanger for bath warming and cooking with a small area is also provided, and the size of the evaporator is extended downward to the part that overlaps with the water-refrigerant heat exchanger for bath warming and cooking. Because it can be extended, the area of the evaporator can be expanded, and it is possible to improve the capacity of hot water supply, heat insulation, and additional cooking, and the size of the main unit does not need to be increased by the size of the evaporator The body can be made compact. Therefore, it is possible to improve the heat pump performance in a compact form, make up for the poor start-up of the heat pump, improve the speed of hot water, improve the COP, reduce the running cost due to electricity bills, It becomes possible to reduce the load on the global environment.

  A fourth invention is characterized in that a box-shaped sheet metal is provided inside the evaporator, and the water-refrigerant heat exchanger for bath warming and cooking is disposed below the box-shaped sheet metal. Without increasing the height, the height of the evaporator can be increased, and the capacity can be improved by increasing the amount of heat absorbed.

  According to a fifth aspect of the present invention, the box-shaped sheet metal is detachable without removing the evaporator, and improves the maintainability of the bath heat-warming water-refrigerant heat exchanger and the hot-water supply water-refrigerant heat exchanger. realizable.

  6th invention is equipped with the bath circulating water pump which sends water to the bath heat-warming water-refrigerant heat exchanger, The said bath circulating water pump is arrange | positioned above the said bath heat-warming water-refrigerant heat exchanger It is characterized by the fact that the distance between the bath heat-warming water-refrigerant heat exchanger and the bath circulation water pump is shortened, heat dissipation loss can be reduced, and efficiency can be improved. It is possible to realize compactness by improving the storage property, and in addition, a bath circulating water pump can be arranged where it can be seen from the front, so that the maintenance property can be improved.

  The seventh invention includes a bath circulation water pump that circulates hot water in the bath heat- and reheating water-refrigerant heat exchanger and a hot-water supply water pump that sends water to the hot-water supply-refrigerant heat exchanger, and the bath circulation water The hot water circulating water pump is arranged above the pump, which can improve maintenance performance, and is equipped with a hot water circulating water pump at an intermediate position between the hot water-refrigerant heat exchanger and the hot water storage tank. By disposing, heat dissipation loss can be reduced and efficiency can be improved.

  An eighth invention includes a hot water storage tank for storing hot water heated to a predetermined temperature in a hot water supply-refrigerant heat exchanger, the hot water storage water, a hot water supply-refrigerant heat exchanger, a bath warming water-refrigerant heat It is characterized in that the exchanger and the evaporator are housed in an integrated main body unit, which eliminates the need for waterproofing measures such as piping, and can be a product that is excellent in cost and safety.

  According to a ninth aspect of the present invention, a hot water storage tank is disposed on one side of the main body unit, and the compressor, the hot water supply water-refrigerant heat exchanger, the bath warming / heating water-refrigerant heat exchanger are connected to the other side of the main body unit. The internal space of the unit can be used effectively, and a large-capacity hot water storage tank can be installed without increasing the unit size.

A tenth aspect of the invention includes a hot water storage tank that stores hot water heated to a predetermined temperature by a hot water-refrigerant heat exchanger, and the water heated by the hot water-refrigerant heat exchanger is supplied to the hot water storage tank. In addition, it is configured to pass water directly to the hot water supply terminal without passing through the hot water storage tank, and the tap water heated by the water-refrigerant heat exchanger supplies hot water to the hot water storage tank. To provide a heat pump water heater that is easy to use, easy to use, and does not worry about running out of hot water because it can be passed directly to a hot water terminal such as a faucet or shower without going through a hot water storage tank. Can do.

  The eleventh aspect of the invention uses carbon dioxide as a refrigerant, and enhances the thermal efficiency at the time of high-temperature hot water supply, and even if the refrigerant leaks to the outside, the influence on global warming is used in a general air conditioner. The heat pump water heater can be significantly reduced as compared with the refrigerant of R-410A, is environmentally friendly, and has excellent recyclability.

  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.

(Embodiment 1)
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 cycle and a hot water supply cycle in the main unit 1. This refrigerant cycle is arranged in series with a vertically placed compressor 2 arranged in the main unit 1, a hot water supply water-refrigerant heat exchanger 3 as a radiator, and a hot water supply water-refrigerant heat exchanger 3. The refrigerant pipe 7 includes a bath heat- and water-refrigerant heat exchanger 4, which is also a radiator, a decompression means 5 made of, for example, an electric expansion valve, and an evaporator 6 made of an L-shaped air heat exchanger. Connected and configured. In addition, a blower fan 8 is provided to apply wind to the evaporator 6 to increase the evaporation capability.

  On the other hand, in the hot water supply cycle, a hot water supply / refrigerant heat exchanger 9 (for example, a heat exchange with a double tube structure integrated with the heat radiator 3) is performed by exchanging heat with the heat radiator 3 to change tap water into hot water. ), 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 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 ( The example, if the radiator 4 and the heat exchanger of the double pipe structure is integral shape), 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 solenoid 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 supply water from the tank hot water supply pipe 28, 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 B30 for preventing 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 32 and the bath 33 through the hot water pipe 30 and the hot water pipe 14.

  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 water inlet pipe that inputs hot water from the bath 13 by driving the bath circulating water pump 18, and the hot water of the bath that has entered from the bath water inlet pipe 38 is supplied to the bath warming / heating 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 cycle, determines the rising state of the refrigerant circulation cycle based on the temperature level, and sets the flow rate (opening) of the original mixing valve 25 and the hot water supply mixing valve 29. It is a means to control.

  Next, the arrangement configuration of each element of the refrigerant cycle and the hot water supply cycle 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.

  In the main unit 1, a vertically placed compressor 2, a radiator 3 (hot-water supply water-refrigerant heat exchanger 9), and a radiator 3 (hot-water supply water-refrigerant heat exchanger 9) above the radiator 3 ( The radiator 4 (bath heat-reserving water-refrigerant heat exchanger 17), the evaporator 6, the blower fan 8, the hot water circulating water pump 15, which are smaller than the hot water-refrigerant heat exchanger 9), The bath circulating water pump 18 is arranged on the left side (that is, one side of the main unit 1).

  Above the radiator 3 (hot water supply water-refrigerant heat exchanger 9) is an intermediate substrate 41, and the evaporator 6 is disposed on the intermediate substrate 41. Above the intermediate substrate 41, there is a box-shaped sheet metal 42 so as to be almost the same height in the horizontal direction as below the evaporator 6, and the radiator 4 (the water-refrigerant heat exchanger 17 for bath warming and cooking) is provided. It is disposed below the box-shaped sheet metal 42. The box-shaped sheet metal 42 has an R-shaped upper corner so that the flow of wind 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.

  Further, the box-shaped sheet metal 42 is shaped so as to fit in the L-shaped portion of the intermediate substrate 41 so that it can be attached and detached without removing the evaporator 6.

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 metal sheet 42, and a bath circulating water pump 18 is disposed above the center of the pump cover sheet metal 43. Is provided with a blower fan 8. 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.

  Furthermore, the hot water storage tank 10 is disposed on the right side of the evaporator 6 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.

  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 | disconnected by the XX arrow of the lower direction, The compressor 2, the heat radiator 3 (water-refrigerant heat exchanger 9), the heat radiator 4 (water-refrigerant for bath heat-warming cooking) A heat exchanger 17) and the like are shown. Although the hot water storage tank 10 is mounted on the base substrate 44, it protrudes to the rear of the main unit 1, and the exterior part of that portion is provided with a bulging portion 1a that is bulged outward. 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. The radiator 4 (bath heat-warming water-refrigerant heat exchanger 17) is also wound in a similar manner, and its size is smaller than that of the radiator 3 (hot-water supply water-refrigerant heat exchanger 9). Yes, it is arranged in front of the radiator 3 (hot water supply-refrigerant heat exchanger 9).

  The water intake pipe 11 and the hot water supply pipe 14 are disposed in front of the main unit 1 and in front of the hot water storage tank 10, and here, pipe 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 L-shaped evaporator 6 is disposed above the 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 arranged, and below the radiator 4 (bath heat-retaining and water-refrigerant heat exchanger 17) is disposed. A bath circulating water pump 18 is disposed above the box-shaped sheet metal 42. The box-shaped sheet metal 42 is made of sheet metal, for example, and has a notch 42a at the right front portion thereof in order to extend the vertically placed compressor 2 upward.

  Further, the evaporator 6 has an L shape and extends to the vicinity of the hot water storage tank 10. The intermediate substrate 41 is provided with a drain hole 41a so that the condensed water of the evaporator 5 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.

  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, and a blower motor 8b is mounted on the blower fan mounting bracket 8a. 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 poured into the bath 13 through the pouring pipe 30, the hot water supply pipe 14, and the faucet 12. It gets hot.

  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 rises and reaches a predetermined hot water supply temperature, the hot water passing through the tank hot water supply pipe 27 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. The 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 mixed with tap water that has passed through the water inlet pipe 11 by the hot water supply mixing valve 29. Supply hot water at the desired temperature.

  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. The hot water mixing valve 29 is mixed with the tap water that has passed through the water inlet pipe 11 to supply hot water.

  Finally, hot water that has passed through the tank hot water supply pipe 27 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 water inlet pipe 11 are mixed by a hot water supply mixing valve 29 to supply hot water at a predetermined temperature. That is, the controller 39 grasps the rising state of the refrigerant cycle, adjusts the opening degree of the original mixing valve 27 and the hot water supply mixing valve 29, and controls to supply hot water of a predetermined temperature to the hot water supply terminal.

  Further, when the user closes the faucet 12 or when it is no longer necessary to supply hot water because an appropriate amount of hot water has accumulated in the bath 13, the hot water circulating water pump 15 is driven, the hot water solenoid valve 26 is opened, and the next hot water supply operation is started. Therefore, a hot water storage operation in which hot water is stored in the hot water storage tank 10 is performed.

  Thus, according to the rising state of the refrigerant cycle, the hot water stored in the hot water storage tank 10 is used to supply hot water to the hot water supply terminal, or the hot water is supplied by the hot water supply / refrigerant heat exchanger 9 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 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 poured into the bath 13 through the pouring pipe 30, the hot water supply pipe 14, and the faucet 12. It gets hot.

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 the heat pump water heater of the present embodiment, by disposing the radiator 4 (bath heat retention water-refrigerant heat exchanger 17) above the radiator 3 (hot water supply water-refrigerant heat exchanger 9), The heat retaining property of the radiator 4 (bath heat retaining and cooking water-refrigerant heat exchanger 17) is enhanced, and the quick hot water property can be enhanced. Furthermore, since the piping path from the radiator 3 (hot water supply water-refrigerant heat exchanger 9) to the radiator 4 (bath heat retention and cooking water-refrigerant heat exchanger 17) can be shortened, the heat dissipation in the piping is possible. Loss can be reduced and the heat exchange rate can be improved. Furthermore, radiator 3 (hot water supply water-refrigerant heat exchanger 9) and radiator 4 (bath warming / heating water-refrigerant heat exchanger 17)
Can be combined in a compact manner, and the main body can be reduced in size and space. In addition, it is possible to take out the radiator 3 (hot water supply water-refrigerant heat exchanger 9) and the radiator 4 (bath heat-reserving water-refrigerant heat exchanger 17) from the front, improving the maintainability. Can be planned.

  Further, in the present embodiment, an L-shaped evaporator 6 is disposed above the radiator 3 (hot water supply water-refrigerant heat exchanger 9) via the intermediate substrate 41, and heat is dissipated inside the evaporator 6. A radiator 4 (water for bath warming / refrigerant heat exchanger 17) having a smaller area than that of the water heater 3 (water for hot water supply-refrigerant heat exchanger 9) is provided, and the size of the evaporator 6 is radiated from the radiator. 4 (bath heat retention and cooking water-refrigerant heat exchanger 17) can be extended to the lower part to extend downward, so that the heat transfer area of the evaporator 6 can be expanded and the hot water supply, heat retention, and additional cooking capacity can be improved. Since the size of the main unit 1 does not need to be increased as the evaporator 6 becomes larger, the main unit can be made compact. Therefore, it is possible to improve the heat pump performance in a compact form, make up for the poor start-up of the heat pump, improve the speed of hot water, improve the COP, reduce the running cost due to electricity bills, It becomes possible to reduce the load on the global environment.

  Further, the drainage hole 41a is provided in the intermediate substrate 41 so that the condensed water of the evaporator 6 is drained, so that moisture is frozen below the evaporator 6 at a low temperature, and transmitted. The heat area is reduced, preventing a decrease in capacity, and ensuring high capacity even at low temperatures.

  Further, in the present embodiment, a box-shaped sheet metal 42 is provided inside the evaporator 6, and a radiator 4 (bath warming / heating water-refrigerant heat exchanger 17) is disposed below the box-shaped sheet metal 42. Even if the main unit 1 is not enlarged, the height of the evaporator 6 can be increased, and as a result, the heat transfer area can be increased, and the capacity can be improved by increasing the heat absorption amount. Further, the box-shaped sheet metal has an R-shaped upper corner, so that the air flow from the lower side of the evaporator 6 becomes smooth, and even if the gap between the lower side of the evaporator 6 and the box-shaped sheet metal 42 is narrow, the amount of air Can be prevented and frost formation can be prevented easily, and the continuous operation time can be extended to improve efficiency.

Further, in the present embodiment, the box-shaped sheet metal 42 is detachable without removing the evaporator 6, and the radiator 4 (bath warming / heating water-refrigerant heat exchanger 17) and the radiator 3 (hot water supply water-refrigerant). It is possible to improve the maintainability of the heat exchanger 9). In particular, since the radiator 4 (bath heat-reserving water-refrigerant heat exchanger 17) circulates the hot water in the bath 13, dirt, hair, and the like in the bath may flow. There is a risk of clogging. When such clogging occurs, maintenance of the radiator 4 (bath warming water-refrigerant heat exchanger 17) is essential. For this reason, the box-shaped sheet metal 42 is not removed without removing the evaporator 6. Can be removed, the radiator 4 (bath warming / heating water-refrigerant heat exchanger 17) housed in the box-shaped sheet metal 42 can be easily taken out, and maintenance can be greatly improved. .

  Further, in the present embodiment, a bath in which the hot water of the radiator 4 (bath warming / heating water-refrigerant heat exchanger 17) is circulated above the radiator 4 (bath warming / heating water-refrigerant heat exchanger 17). The circulating water pump 18 is disposed, and the distance between the radiator 4 (bath warming / heating water-refrigerant heat exchanger 17) and the bath circulating water pump 18 is shortened, and it becomes possible to reduce heat dissipation loss. , Efficiency can be improved. In addition, it is possible to realize compactness by improving the storage property, and in addition, the bath circulating water pump 18 can be disposed in a place that can be seen from the front, so that the maintenance property can be improved. In particular, since the bath circulating water pump 18 circulates the hot water of the bath 13, there is a possibility that dirt, hair, etc. in the bath may flow. Failure due to dirt and clogging of the hair is likely to occur prior to the heat exchanger 17). At that time, it is indispensable as a product to make maintenance easy. In particular, bath circulation water pumps are not fixed by welding, but are kept out of print with metal fittings and can be easily repaired at the installation site. It is.

  In the present embodiment, a hot water circulating water pump 15 is disposed above the bath circulating water pump 18, and the hot water circulating water pump 15 is also improved in maintainability. The hot-water supply circulating water pump 15 connects the radiator 3 (hot-water supply water-refrigerant heat exchanger 9) and the hot water storage tank 10 as can be seen in FIG. Therefore, it becomes the middle of both, and will be arrange | positioned in the position which can shorten piping length.

  Thereby, heat loss can be reduced, efficiency can be improved, and maintainability can be improved. Furthermore, the noise source and the vibration source of the main unit 1 such as the compressor 2, the blower fan 8, the hot water circulating water pump 15, and the bath circulating water pump 18 are arranged nearby, so that common soundproofing measures are taken. It becomes possible. For example, by attaching a soundproofing material to the inside of the main unit 1 in front of the compressor 2 and the bath circulating water pump 18, or using a vibration-proof steel plate for the pump cover plate 43 that fixes the blower fan 8. When the vibration is suppressed, it can be handled as a common part. As a result, it is possible to significantly reduce the component material costs for low noise and low vibration, and to reduce the cost of the equipment.

  Moreover, in this Embodiment, the hot water storage tank 10 which stores the tap water heated to predetermined temperature with the heat radiator 3 (hot water supply water-refrigerant heat exchanger 9) is provided, and the hot water storage tank 10 and the heat radiator 3 (hot water supply water) are provided. -Refrigerant heat exchanger 9), radiator 4 (bath heat-warming water-refrigerant heat exchanger 17), and evaporator 6 are housed in an integrated main unit, and waterproofing measures such as piping are not required. It can be made into a product with low cost and excellent safety. In addition, the horizontal width of the main unit 1 can be reduced, and the installation area can be greatly reduced.

Therefore, it is possible to provide a heat pump water heater that is compact and greatly improves installation flexibility. Moreover, in this Embodiment, the compressor 2 and the heat radiator 3 (hot-water supply water-refrigerant heat exchanger 9) and the compressor 2 and the heat radiator 4 (bath heat retention and cooking water-refrigerant heat exchanger 17) in the same space. Can be connected at the shortest distance, and the heat efficiency can be maintained high by reducing the pipe loss.

  Moreover, in this Embodiment, the hot water storage tank 10 is distribute | arranged to the one side of the main body unit 1, the compressor 2, the heat radiator 3 (hot-water supply water-refrigerant heat exchanger 9), and the heat radiator 4 (bath warming supplement cooking). The water-refrigerant heat exchanger 17) is disposed on the other side of the main unit 1 so that the internal space of the main unit 1 can be used effectively, and a large capacity can be obtained without increasing the size of the main unit. A hot water storage tank can be installed.

  In maintenance, the hot water cycle and refrigerant cycle can be zoned, and water components that can be easily attached and detached are used. The hot water cycle that can be handled by simple replacement at the installation site and brazing the refrigerant components to the installation site Repair and replacement at the factory are difficult, and in some cases, complicated refrigerant cycles that are returned to the factory for repair and replacement are separated, so that maintainability is greatly improved. In particular, if the exterior parts constituting the main unit 1 are divided into a hot water storage tank 10 portion and a radiator 3 (hot water supply water-refrigerant heat exchanger 9) and the like, there is no worry of touching the refrigerant cycle, and hot water supply. Cycle maintenance is possible.

  In addition, the hot water circulating water pump 15 and the bath circulating water pump 18 are incorporated on the refrigerant cycle side, and these are often high-pressure parts when replacing them, so that the high-pressure part is not touched as much as possible. Is possible. Moreover, as shown in FIG.3 and FIG.4, the hot water storage tank 10 is distribute | arranged to the right side of the main body unit 1, and the compressor 2, the radiator 3 (hot water supply water-refrigerant heat exchanger 9), and the radiator 4 ( The bath heat-retaining water-refrigerant heat exchanger 17), the hot water circulating water pump 15, and the bath circulating water pump 18 are arranged on the left side.

  Thereby, since the vertical and horizontal dimensions of the main unit 1 can be fully utilized, the size of the hot water storage tank 10 can be increased as much as possible. In other words, the large-capacity hot water storage tank 10 can be installed without increasing the size of the main unit 1. Therefore, it is possible to provide a heat pump water heater that is compact and has a good hot water supply property.

  Although it can be made smaller than a conventional hot water storage type heat pump water heater, when the temperature is low and the rise of the refrigerant circulation circuit 7 is slow, the time for hot water supply from the hot water storage tank 10 becomes longer or the hot water runs out. Therefore, in order to avoid this, the hot water storage tank 10 is desirably larger.

  On the other hand, in the present embodiment, the compressor 2, the radiator 3 (hot-water supply water-refrigerant heat exchanger 9), the radiator 4 (bath heat-warming water-refrigerant heat exchanger 17), hot-water supply circulating water. The internal dimensions of the main unit 1 are maximized by arranging the pump 15 and the bath circulating water pump 18 on one side (left side) and away from the hot water storage tank 10 on the other side (right side). It can be used to install a large hot water storage tank 10.

  In the present embodiment, the tap water warmed by the radiator 3 (hot water supply-refrigerant heat exchanger 9) is supplied to the hot water storage tank and directly to the hot water supply terminal without passing through the hot water storage tank. Like to do. Therefore, the tap water heated by the radiator 3 (hot water supply-refrigerant heat exchanger 9) can be supplied to a hot water storage tank, and directly to a hot water supply terminal such as a faucet or a shower without going through the hot water storage tank. Since the water is passed, 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.

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.

  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 particularly useful for, for example, 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 (A) ZZ sectional view of FIG. 2 (b) YY sectional view of FIG. 2 (c) XX sectional view of FIG. Circuit diagram of a conventional heat pump water heater Front view of the heat pump water heater (heat pump unit) Plan view of the heat pump water heater (heat pump unit) Circuit diagram of the heat pump water heater Structure of the heat pump water heater

Explanation of symbols

1 Main Unit 2 Compressor 3 Heat Dissipator (Water for Hot Water Supply-Refrigerant Heat Exchanger)
4 radiator (bath heat-reserving water-refrigerant heat exchanger)
5 Pressure reducing means 6 Evaporator 7 Refrigerant circulation circuit 8 Blower fan (Blower means)
9 Hot water supply water-refrigerant heat exchanger 10 Hot water storage tank 11 Inlet pipe 12 Faucet (hot water supply terminal)
DESCRIPTION OF SYMBOLS 15 Hot-water supply circulating water pump 17 Bath heat retention cooking water-refrigerant heat exchanger 18 Bath circulating water pump 41 Intermediate board 42 Box-shaped sheet metal

Claims (11)

A compressor, an evaporator, and a decompression means, each of which is connected to a radiator sequentially to form a closed circuit, a refrigerant circulation circuit for circulating the refrigerant by the compressor, and a blowing means for blowing air to the evaporator, A water-refrigerant heat exchanger that performs heat exchange with the radiator, and the water-refrigerant heat exchanger is composed of a hot-water supply water-refrigerant heat exchanger and a bath heat-warming water-refrigerant heat exchanger. Heat pump water heater. 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 by the compressor, a blowing unit that blows air to the evaporator, the radiator and heat A water-refrigerant heat exchanger that performs replacement, and the water-refrigerant heat exchanger is composed of a hot-water supply water-refrigerant heat exchanger and a bath-warming water-refrigerant heat exchanger, and the hot-water supply water-refrigerant. A heat pump water heater, wherein the water-refrigerant heat exchanger for bath warming and cooking is disposed above the heat exchanger. An L-shaped evaporator is arranged above the hot water supply water-refrigerant heat exchanger via an intermediate substrate, and the bath has a smaller area than the hot water supply water-refrigerant heat exchanger inside the evaporator. The heat pump water heater according to claim 1 or 2, wherein a water-refrigerant heat exchanger for keeping warm and cooking is disposed. The heat pump water heater according to claim 1 or 2, wherein a box-shaped sheet metal is provided inside the evaporator, and the water-refrigerant heat exchanger for bath warming and cooking is disposed below the box-shaped sheet metal. The heat pump water heater according to claim 4, wherein the box-shaped sheet metal is configured to be detachable without removing the evaporator. A bath circulation water pump for sending water to the bath heat-retaining water-refrigerant heat exchanger is provided, and the bath circulation water pump is disposed above the bath heat-retaining water-refrigerant heat exchanger. The heat pump water heater according to any one of claims 1 to 5. Bath warming and cooking water-bath circulating water pump that circulates hot water in the refrigerant heat exchanger and hot water circulating water pump that sends water to the hot water-refrigerant heat exchanger, and above the bath circulating water pump, The heat pump water heater according to any one of claims 1 to 6, wherein a hot water circulating water pump is provided. A hot water storage tank for storing hot water that has been heated to a predetermined temperature by a hot water supply-refrigerant heat exchanger, the hot water storage tank, hot water supply-refrigerant heat exchanger, a bath warming water-refrigerant heat exchanger, an evaporator, The heat pump water heater according to any one of claims 1 to 7, wherein the heat pump water heater is stored in an integrated body unit. A hot water storage tank is arranged on one side of the main unit, and a compressor, a hot water supply water-refrigerant heat exchanger, and a bath heat-warming water-refrigerant heat exchanger are arranged on the other side of the main unit. The heat pump water heater according to claim 8. A hot water storage tank for storing hot water heated to a predetermined temperature by a hot water supply / refrigerant heat exchanger is provided, and the water heated by the hot water supply / refrigerant heat exchanger is supplied to the hot water storage tank and the hot water storage tank. The heat pump water heater according to any one of claims 1 to 9, wherein the heat pump water heater is configured to directly pass water to a hot water supply terminal without using an intermediary. The heat pump water heater according to any one of claims 1 to 10, wherein carbon dioxide gas is used as the refrigerant.

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