JP4047792B2 - Heat pump water heater - Google Patents

Description

  The present invention relates to a heat pump hot water supply apparatus including a heat pump hot water supply system capable of supplying a large amount of hot water.

A large-capacity system is required to produce a large amount of hot water with a heat pump hot water supply device, but when judged comprehensively based on conditions such as initial cost and running cost, a system with an appropriate tank capacity with an appropriate hot-water supply capacity is required. ing. In addition, a hot water storage tank is necessary to make hot water used during the day and store it within the time when cheap electricity charges are applied.
[Patent Document 1] discloses a heat pump hot water supply apparatus that can cope with a required large heating capacity without redesigning the components of the heat pump cycle. This is because hot water heated by multiple heat pump cycles is stored in a hot water storage tank, and a reference number is set for each heat pump cycle, and the number of cycles is controlled from this reference number to ensure the required number and improve the efficiency of heating capacity. I am trying.
JP 2003-166750 A

As described above, the technique of the above-mentioned [Patent Document 1] is a hot water supply device for a user whose amount of hot water used is often increased rapidly due to, for example, a restaurant or the like, and satisfies the usage condition. This is advantageous only in some cases.
However, almost all users have a certain degree of difference depending on the time of day and the season, but there is no drastic change and the amount of hot water used is almost constant throughout the year. The problem is whether the capacity of the hot water storage tank is appropriate for the user. It would be convenient for the manufacturer to provide hot water storage tanks with various capacities, and to select and provide hot water storage tanks with suitable capacities to the user.
However, the tank capacity varies depending on the user, and a variety of hot water storage tanks are required to meet all of the respective demands. It is a burden for manufacturers to manufacture these hot water storage tanks with various capacities in advance and manage them as inventory. Of course, as few types as possible lead to cost reduction.

  The present invention has been made paying attention to the above-mentioned problems. The purpose of the present invention is to provide a tank capacity corresponding to the demands of more users by modularizing hot water storage tanks and preparing only the minimum necessary types. It is an object of the present invention to provide a heat pump hot water supply device capable of this system.

The heat pump hot water supply apparatus of the present invention is made to satisfy the above-mentioned object,
As a heat pump type heat source machine, it is equipped with a water heat exchanger that exchanges heat between the compressed refrigerant discharged from the compressor constituting the heat pump type refrigeration cycle and the supply water for hot water supply, and heats the supply water to change to hot water,
As a main tank unit, a plurality of hot water storage tanks B, A housed in a housing, a high temperature water supply pipe having one end connected to the upper part of one hot water storage tank B and the other end connected to a discharge part of a water heat exchanger, One end is connected to the bottom of the other hot water storage tank A and the other end is connected to the low temperature water supply pipe connected to the suction portion of the water heat exchanger, the bottom of one hot water storage tank B and the upper part of the other hot water storage tank A. A connecting pipe between the tanks, an auxiliary pipe that is interposed in the connecting pipe between the tanks to maintain or disconnect the piping connection between the hot water storage tanks B and A, one end is connected to the upper part of one hot water storage tank B, and the other is a hot water inlet A hot water supply pipe connected to the water supply pipe, one end connected to the bottom of the other hot water storage tank A and the other end connected to a water source, etc.
Connection as a sub-tank unit, a plurality of sub-storage tank C housed in the housing, D, hot water supply pipe having one end connected to the top of one of the sub-storage tank D, one end of the bottom portion of the other sub-storage tank C A low temperature water supply pipe, a tank connecting pipe connected to the bottom of one sub hot water storage tank D and the upper part of the other sub hot water storage tank C, and the like.
Further, an extension for connecting one end of the inter-tank connection pipe connected to the upper part of the other hot water storage tank A of the main tank unit and one end of the low temperature water supply pipe connected to the bottom of the other sub hot water storage tank C of the sub tank unit. Piping for
An extension for connecting one end of an inter-tank connection pipe connected to the bottom of one hot water storage tank B of the main tank unit and one end of a high temperature water supply pipe connected to the upper part of one sub hot water storage tank D of the sub tank unit Provide piping.

  According to the present invention, it is sufficient to prepare only the minimum necessary types by modularizing the hot water storage tank, and it is possible to provide a system that can accommodate a larger number of users. There is an effect that the improvement of the degree can be obtained.

[Example 1]
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a piping configuration diagram of a heat pump water heater.
The heat pump hot water supply apparatus includes a heat pump heat source device 1 and a tank unit 2.
In the heat pump heat source machine 1, the inside of the housing 3 is divided into upper and lower two chambers 5 a and 5 b by a partition plate 4. A water heat exchanger 6 is accommodated in the upper chamber 5a, and a compressor 7, a four-way valve 8, an outdoor heat exchanger 9 and a decompression device (not shown) are accommodated in the lower chamber 5b. The water heat exchanger 6, the compressor 7, the four-way valve 8, the outdoor heat exchanger 9, and the pressure reducing device are communicated with each other via a refrigerant pipe P to constitute a heat pump type refrigeration cycle.
The water heat exchanger 6 is provided with a refrigerant pipe through which the refrigerant conducts and a water pipe 10 for guiding the supply water, so that heat can be exchanged between the refrigerant and the supply water. Both ends of the water pipe 10 project outside from the water heat exchanger 6 as a suction part a and a discharge part b. A pump 11 is connected to the suction part a, and the pump 11 is driven to forcibly suck up the supplied water and guide it to the water pipe 10 of the water heat exchanger 6.

  A plurality of temperature sensors C described so as to begin with a black circle and an initial “T” in the drawing are attached to a predetermined portion of the heat pump heat source apparatus 1 configured as described above. Not electrically connected to the control unit. Each temperature sensor C detects the temperature at the attachment site and sends the detection signal to the control unit. The control unit always comprehensively judges the detection signals sent from each temperature sensor C, and sends necessary control signals to the compressor 7 and the four-way valve 8 and other electric parts to control them.

The tank unit 2 includes a first hot water storage tank 16A and a second hot water storage tank 16B in a housing 15. The tank capacities of the first and second hot water storage tanks 16A and 16B are assumed to be 560L, for example, and the tank capacity is approximately 1000L in total.
Three pipes are connected to the bottom of the first hot water storage tank 16A. The left pipe 17 is a connection pipe connected to one port of the first three-way valve 18. The central pipe 19 is a connecting pipe connected to one port of the second three-way valve 20. The other ports of the first three-way valve 18 and the second three-way valve 20 are communicated with each other via different connection pipes 21.

A high-temperature water supply pipe 22 extending from the discharge part b of the water heat exchanger 6 accommodated in the heat pump heat source apparatus 1 is connected to the port of the rest of the first three-way valve 18. The remaining port of the second three-way valve 20 is connected to a low-temperature water supply pipe 23 that extends to the suction part a of the water heat exchanger 6.
Further, a water supply pipe 25 is connected to the bottom of the first hot water storage tank 16A, and this water supply pipe 25 communicates with a middle portion of the water supply pipe 28 that communicates the pressure reducing valve 26 and the electric mixing valve 27. . The pressure reducing valve 26 and a dedicated stop cock 29 provided outside the housing 15 are connected by a water supply pipe 30, and the dedicated stop cock 29 communicates with a water source (not shown).

A high temperature water supply pipe 31 and a hot water supply pipe 32 are connected to the upper part of the second hot water storage tank 16B. The high-temperature water supply pipe 31 extends to the bottom of the second hot water storage tank 16B, and is connected to the middle part of the connection pipe 21 that communicates the first three-way valve 18 and the second three-way valve 20. The hot water supply pipe 32 is connected to a first hot water tap 33 which is a position protruding from the outside of the housing 15, for example, a hot water outlet B provided in a kitchen or the like.
A branch pipe 34 that communicates with the electric mixing valve 27 is connected to a middle portion of the high-temperature water supply pipe 32 that communicates the upper portion of the second hot water storage tank 16 </ b> B and the first hot water tap 33. The electric mixing valve 27 is connected to a hot and cold water mixing pipe 35. The hot and cold water mixing pipe 35 is connected to a second hot water tap 36 which is a hot water outlet A provided in a bath or the like, for example, at a position protruding from the outside of the casing 15. Connected. And the upper part of the 1st hot water storage tank 16A and the bottom part of the 2nd hot water storage tank 16B are connected by the connecting pipe 38 between tanks.

  In the heat pump hot water supply apparatus configured as described above, the control unit drives and controls the compressor 7 of the heat pump heat source unit 1 when, for example, it is time to apply a late-night power charge. The refrigerant compressed in the compressor 7 is led to the water heat exchanger 6 through the four-way valve 8 as indicated by the solid line arrow in the figure, where it condenses and releases condensation heat. The refrigerant is led to the outdoor heat exchanger 9 through the decompression device, and after evaporating, the refrigerant is sucked into the compressor 7 through the four-way valve 8 and is compressed again to circulate through the above cycle.

In the tank unit 2, the first three-way valve 18 and the second three-way valve 20 are controlled to be switched so that the supply water is guided in the direction indicated by the solid line arrow in the figure, and the pump 11 is driven. The supply water stored in the bottom of the first hot water storage tank 16A is led to the water heat exchanger 6 through the second three-way valve 20 and the low temperature water supply pipe 23, and when the heat is exchanged with each other, the temperature of the supply water rises and the temperature increases. It becomes water (hot water). The high temperature water is guided to the upper part of the second hot water storage tank 16B through the high temperature water supply pipe 22, the first three-way valve 18 and the high temperature water supply pipe 31 . Therefore, first, the high temperature water is filled in the second hot water storage tank 16B.

Since the first hot water storage tank 16A and the second hot water storage tank 16B communicate with each other via the inter-tank connection pipe 38, the operation of the compressor 7 and the pump 11 is continued to fill the second hot water storage tank 16B. The hot water to be conducted is guided to the first hot water storage tank 16A through the inter-tank connecting pipe 38. Accordingly, the first hot water storage tank 16A is finally filled with high-temperature water.
When the first hot water tap 33 is opened, the high temperature water (hot water) stored in the second hot water storage tank 16B is led to the hot water supply pipe 32 and supplied. When the second hot water tap 36 is opened, the hot water supplied from the second hot water storage tank 16B and the cold water led from the dedicated stop cock 29 via the pressure reducing valve 26 are mixed in the electric mixing valve 27, and the temperature drops. Then it is supplied as medium temperature water.

  When high-temperature water is supplied from the second hot water storage tank 16B, the amount of cold water equivalent to the supplied amount is supplied to the first water via the dedicated stop cock 29, the water supply pipe 30, the pressure reducing valve 26, and the water supply pipe 25. It is supplied to the bottom of the hot water storage tank 16A. The high temperature water in the first hot water storage tank 16A is pushed up by newly supplied cold water, and is guided to the second hot water storage tank 16B via the inter-tank supply pipe 38.

The first and second hot water storage tanks 16A and 16B are always filled with a predetermined amount of high temperature water and cold water, and the amount of cold water increases as the high temperature water is supplied. In other words, the high-temperature water is pushed out to the cold water and fed from the hot water taps 33 and 36.
If this state continues, the first hot water storage tank 16A will eventually be filled with cold water, and the cold water will accumulate and rise at the bottom of the second hot water storage tank 16B. A plurality of temperature sensors (not shown) are also attached to predetermined portions of the tank unit 2, and each temperature sensor always sends detection signals to the control unit, and the control unit detects that the amount of cold water exceeds a predetermined amount from these detection signals. Judge that. At that time, the control unit sends drive signals to the compressor 7 and the pump 11 to resume driving.

Therefore, even in the time zone when the late-night electricity charge is not applied, the cold water in the lower part of the first hot water storage tank 16A is led to the water heat exchanger 6 via the second three-way valve 20 and the low-temperature water supply pipe 23, The operation is the same as when the midnight electricity rate is applied, which changes to hot water (hot water) when the temperature rises. Since the proportion of high-temperature water in the second hot water storage tank 16B gradually increases and the amount of cold water in the lower portion of the first hot water storage tank 16A gradually decreases, there is no problem with hot water supply.
Since the heat pump heat source machine 1 is disposed outdoors, it is easily affected by outside air. In particular, in winter, the outside air temperature drops to a very low temperature, so that the dew adhering to the outdoor heat exchanger 9 that evaporates the refrigerant freezes and replaces frost. The frost adhering to the outdoor heat exchanger 9 increases in thickness with the passage of time, reducing the heat exchange efficiency of the outdoor heat exchanger 9.

  Such a change in state is comprehensively determined by the control unit that has received the detection signal from each temperature sensor C, and is controlled to perform the defrosting operation. Specifically, the drive signal is sent to the compressor 7 and the four-way valve 8 is switched and controlled to cause the refrigerant to conduct in the direction indicated by the broken line arrow in the figure. Therefore, the high-temperature and high-pressure refrigerant gas compressed and discharged by the compressor 7 is directly led to the outdoor heat exchanger 9 through the four-way valve 8 and heats the outdoor heat exchanger 9 to melt the attached frost.

  The control unit also sends a drive signal to the pump 11 and switches and controls the first three-way valve 18 and the second three-way valve 20. As indicated by a broken line arrow in the figure, the high temperature water in the upper part of the second hot water storage tank 16B is guided to the high temperature water supply pipe 31, and the pump 11 is connected via the connection pipe 21, the second three-way valve 20, and the low temperature water supply pipe 23. Sucked into. In this state, there is no change in being hot water, and it is led from the pump 11 to the water heat exchanger 6 to exchange heat with the refrigerant.

  On the other hand, since the refrigerant guided to the water heat exchanger 6 exchanges heat with the outdoor heat exchanger 9 and melts the frost adhering thereto, the refrigerant is in a low temperature state compared with the refrigerant temperature in a normal refrigeration cycle. It has become. However, high-temperature water is supplied from the second hot water storage tank 16B of the main tank unit 2 to the water heat exchanger 6 of the heat pump heat source unit 1, and heat is exchanged with a low-temperature refrigerant to change the refrigerant temperature to that in a normal refrigeration cycle. Increase to a temperature approximately equal to the temperature. The frost adhering to the outdoor heat exchanger 9 as the refrigeration cycle efficiency is improved is quickly melted.

  In this manner, during the defrosting operation by the heat pump heat source unit 1, the high-temperature water in the upper part of the second hot water storage tank 16B is guided to the water heat exchanger 6 in the tank unit 2, and water is supplied from the second hot water storage tank 16B. A defrosting circuit 37 in which high-temperature water circulates in the direction of the first hot water storage tank 16 </ b> A via the heat exchanger 6 is configured, so that the refrigeration cycle efficiency in the heat pump heat source unit 1 is increased and the outdoor heat exchanger 9 The shortening of the defrosting time with respect to is obtained.

In any case, the heat pump heat source unit 1 and the tank unit 2 are configured independently, and the water heat exchanger 6 and the first and second three-way switching valves 18 and 20 are connected to each other at a high temperature water supply pipe 22. And the low temperature water supply pipe 23 are connected to form a heat pump water heater.
The heat pump type heat source device 1 is manufactured in advance, for example, in two types of 8 KW and 14 KW, and inventory management is performed. Although the tank capacity of the first hot water storage tank 16A and the second hot water storage tank 16B has been described as 560L, for example, it is not limited to this. Four types of tank units having tank capacities of, for example, 370L, 460L, 560L, and 1000L are manufactured in advance and stocked. In any case, it is enough to prepare the minimum necessary types, and it does not take much time.

  In this case, it is possible to combine the tank unit 2 with four types of tank capacity with respect to the heat pump type heat source device of 8 KW, and with the tank unit 2 with four types of tank capacity with respect to the heat pump type heat source device 1 of 14 KW. Combinations are possible and many different combinations are possible. Therefore, the conditions for use by most users can be satisfied, which contributes to cost reduction for manufacturers.

[Example 2]
Embodiment 2 of the present invention will be described below with reference to the drawings. FIG. 2 is a schematic configuration diagram of the heat pump hot water supply apparatus at the time of shipment from the factory, and FIG. 3 is a schematic configuration diagram of the heat pump hot water supply apparatus in an installed state.
First, referring to FIG. 2, when the heat pump water heater is shipped from the factory, three units of the heat pump heat source device 1, a main tank unit 50 described later, and a sub tank unit 100 are arranged.

The heat pump heat source unit 1 has the same configuration as that described in the first embodiment, and protrudes from the discharge part b and the suction part a of the water heat exchanger 6 to the outside of the housing 3 via the pump 11. A pipe connector d is provided there.
The main tank unit 50 has substantially the same configuration as that of the tank unit 2 described in the first embodiment. That is, the first hot water storage tank 16A and the second hot water storage tank 16B are accommodated in the housing 15. One end of a high-temperature water supply pipe 31a is connected to the upper part of the second hot water storage tank 16B, and a pipe connector d is attached to the other end.

  One end of the low-temperature water supply pipe 23 is connected to the bottom of the first hot water storage tank 16A, and a pipe connector d is attached to the other end. The upper part of the first hot water storage tank 16A and the bottom part of the second hot water storage tank 16B are communicated with each other by inter-tank connection pipes 38a and 38b and the auxiliary pipe 40. In other words, the pipe connector d is connected to the end of the inter-tank connection pipe 38a connected to the upper part of the first hot water storage tank 16A and the end of the inter-tank connection pipe 38b connected to the bottom of the second hot water storage tank 16B. Mounted.

On the other hand, the auxiliary pipe 40 is bent in a substantially U shape, and pipe connectors d are attached to both ends thereof and connected to the pipe connectors d at the ends of the inter-tank connecting pipes 38a and 38b. For this reason, the pipe connector d for connecting the inter-tank connecting pipes 38a, 38b and the auxiliary pipe 40 is removed as necessary, and other pipes are connected to the inter-tank connecting pipes 38a, 38b instead of the auxiliary pipe 40. It is possible.
A pipe connector d is attached to the other end of the hot water supply pipe 32a connected to the upper part of the second hot water storage tank 16B, and a water supply pipe 25 connected to the bottom of the first hot water storage tank 16A is electrically shown schematically. A mixing valve 27, a pressure reducing valve 26, and the like are provided, and a branch pipe from the hot water supply pipe 32a is connected. A pipe connector d is attached to the other end of the water supply pipe 25.

  In the sub tank unit 100, a first sub hot water storage tank 16C and a second sub hot water storage tank 16D are accommodated in a housing 45. One end of a low-temperature water supply pipe 25a is connected to the bottom of the first sub hot water storage tank 16C, and a pipe connector d is attached to the other end of the low-temperature water supply pipe 25a. One end of a high temperature water supply pipe 31b is connected to the upper part of the second sub hot water storage tank 16D, and a pipe connector d is attached to the other end of the high temperature water supply pipe 31b. An inter-tank connection pipe 46 is connected to the upper portion of the first sub hot water storage tank 16C and the bottom of the second sub hot water storage tank 16D.

  The three units 1, 50 and 100 configured as described above are carried into the installation site and installed at a predetermined site. Then, piping is performed as shown in FIG. The high temperature water supply pipe 31a connected to the upper part of the second hot water storage tank 16B and the discharge part b of the water heat exchanger 6 are connected to each other via a separately prepared high temperature water supply pipe 51 and a pipe connector d. Similarly, the low temperature water supply pipe 23 connected to the bottom of the first hot water storage tank 16A and the suction part a of the water heat exchanger 6 are connected to each other via a separately prepared low temperature water supply pipe 52 and a pipe connector d. To do.

  A hot water supply pipe 53 communicating with a hot water supply port (not shown) is connected to the hot water supply pipe 32a connected to the upper part of the second hot water storage tank 16B through a pipe connector d. A water supply pipe 54 communicating with a water source of the supply water is connected to the water supply pipe 25 connected to the bottom of the first hot water storage tank 16A via a pipe connector d. Here, a medium hot water supply pipe (not shown) is connected to the electric mixing valve 27.

  The auxiliary pipe 40 is removed from the inter-tank connection pipes 38a and 38b communicating the first hot water storage tank 16A and the second hot water storage tank 16B, the inter-tank connection pipe 38a extending from the upper part of the first hot water storage tank 16A, and the first The low temperature water supply pipe 25a extended from the bottom of the sub hot water storage tank 16C is connected via a separately prepared expansion pipe 55 and a pipe connector d. Then, the inter-tank connection pipe 38b extending from the bottom of the second hot water storage tank 16B and the high-temperature water supply pipe 31b extending from the upper part of the second sub hot water storage tank 16D are connected to the separately prepared extension pipe 56 and pipe connection. Connect via tool d. This completes the piping work at the installation site.

  By performing the refrigeration cycle operation and driving the pump 11 in the heat pump type heat source unit 1, the low temperature water is led from the bottom of the first hot water storage tank 16A to the water heat exchanger 6 to exchange heat with the high temperature and high pressure refrigerant, and the high temperature water. Change to (hot water). The high temperature water discharged from the water heat exchanger 6 is guided to the upper part of the second hot water storage tank 16B. The high temperature water filling the second hot water storage tank 16B is added to the upper part of the second sub hot water storage tank 16D via the extension pipe 56 newly connected from the inter-tank connection pipe 38b and the existing high temperature water supply pipe 31b. Led.

  The high-temperature water filling the second sub hot water storage tank 16D is guided to the upper part of the first sub hot water storage tank 16C via the inter-tank connection pipe 46. The high temperature water filling the first sub hot water storage tank 16C is transferred to the first hot water storage tank 16A via the existing low temperature water supply pipe 25a, the newly added expansion pipe 55 and the existing inter-tank connection pipe 38a. Led. The high-temperature water obtained by the water heat exchanger 6 in this way is filled in the order of the second hot water storage tank 16B-second sub hot water storage tank 16D-first sub hot water storage tank 16C-first hot water storage tank 16A.

  On the other hand, the hot water in the second hot water storage tank 16B is supplied by opening the hot water tap. Then, high-temperature water equivalent to the amount of hot water supply is replenished from the second sub hot water storage tank 16D to the second hot water storage tank 16B via the expansion pipe 56, and the first sub hot water storage tank 16D is supplied to the second sub hot water storage tank 16D. High temperature water is replenished from the tank 16C, and high temperature water is replenished from the first hot water storage tank 16A to the first sub hot water storage tank 16C. Further, an amount of cold water equivalent to the amount of hot water supplied is supplied to the bottom of the first hot water storage tank 16A, and all the hot water storage tanks 16A and 16B and the sub hot water storage tanks 16C and 16D are always filled with hot water or cold water.

  The cold water is led in the order of the first hot water storage tank 16A, the first sub hot water storage tank 16C, the second sub hot water storage tank 16D, and the second hot water storage tank 16B in the reverse order of the high temperature water filling. Here again, the refrigeration cycle operation is resumed at a predetermined timing, and the cold water at the bottom of the first hot water storage tank 16A is led to the water heat exchanger 6 to be replaced with high temperature water and led to the upper part of the second hot water storage tank 16B. Performs the same driving action as when applied.

  The first three-way valve 18 and the second three-way valve connected to the bottom of the first hot water storage tank A while frost adheres to the outdoor heat exchanger 9 constituting the heat pump heat source apparatus 1 and the defrosting operation is performed. After switching 20, the pump 11 is driven and controlled. The high temperature water in the upper part of the second hot water storage tank 16B is guided to the water heat exchanger 6, and the temperature of the refrigerant that has been lowered by melting the frost in the outdoor heat exchanger 9 is increased. Thereafter, the water heat exchanger 6 guides the bottom of the first hot water storage tank 16A.

While the defrosting operation is performed by the heat pump heat source unit 1, a defrost response circuit 37A for guiding the high-temperature water in the upper part of the second hot water storage tank 16B to the water heat exchanger 6 in the main tank unit 50 is configured. The refrigeration cycle efficiency of the heat pump heat source apparatus 1 is increased, which contributes to shortening the defrosting operation time for the outdoor heat exchanger 9.
In the main tank unit 50, as described in the second embodiment, four types of tank capacities of the first hot water storage tank 16A and the second hot water storage tank 16B may be prepared and combined. The first sub-hot water storage tank 16C and the second sub-hot water storage tank 16D constituting the same may have four tank capacities prepared in combination.

Therefore, since there are various types of combinations in the main tank unit 50 and the sub tank unit 100, there are more combinations of the sub tank unit 100 with respect to the main tank unit 50. As in the first embodiment, two types of 8 KW and 14 KW are provided. If the heat pump type heat source device 1 can be prepared, the heat pump type heat source device 1 and the tank units 50 and 100 described above can be obtained in many different combinations.
Thus, by arranging the minimum types of heat pump type heat source unit 1 and hot water storage tanks / sub hot water storage tanks 16A to 16D, it is possible to satisfy the conditions of use for almost all users, and to improve user satisfaction. This contributes to cost reduction on the manufacturer side.

FIG. 4 is a piping configuration diagram of a tank unit in a heat pump hot water supply apparatus, showing a modification of the second embodiment, in which a heat pump heat source device is omitted.
That is, the sub tank unit is added based on the specifications. For example, a first sub tank unit 100 and a second sub tank unit 200 are added to the main tank unit 50.

  The second hot water storage tank 16 </ b> B in the main tank unit 50 and the second sub hot water storage tank 16 </ b> D in the first sub tank unit 100 are communicated with each other by an expansion pipe 56. The first sub-hot water storage tank 16C in the first sub-tank unit 100 and the second sub-hot water storage tank 16F in the second sub-tank unit 200 communicate with each other through a newly prepared connection pipe 57. The inter-tank connection pipe 38a connected to the upper part of the first hot water storage tank 16A in the main tank unit 50 is connected to the first sub hot water storage tank 16E in the second sub tank unit 200 via the extension pipe 55a and the inter-tank connection pipe 25b. Communicate with.

  As described above, even if the number of sub tank units further increases, the sub tank units are connected to each other by the connecting pipe 57, and the second hot water storage tank 16B in the main tank unit 50 and the main tank unit 50 are provided adjacent to each other. The second sub hot water storage tank 16 </ b> D of the first sub tank unit 100 communicates with the expansion pipe 56. Then, the first hot water storage tank 16A of the main tank unit 50 and the first sub hot water storage tank 16E in the rearmost sub tank unit (200 in this case) are communicated with each other via the expansion pipe 55a.

  The hot water storage tanks 16A and 16B and the sub hot water storage tanks 16C to 16F described above have an even larger number of combinations depending on the number of sub tank units added, even if the tank capacity is four types and the heat pump heat source unit 1 has only two types. It satisfies the usage conditions of almost all users and contributes to the improvement of user satisfaction and the cost reduction of manufacturers.

  5A and 5B are plan views showing the arrangement configuration of the heat pump heat source unit 1, the main tank unit 50, and the sub tank unit 100 in the second embodiment. 5A shows a state in which the heat pump heat source unit 1, the main tank unit 50, and the sub tank unit 100 are arranged in parallel to the wall surface S of the building, and FIG. 5B shows a heat pump for the wall surface S of the building. Only the heat source unit 1 is arranged in parallel, and the main tank unit 50 and the sub tank unit 100 are arranged in the vertical direction.

  In any case, the main tank unit 50 and the sub tank unit 100 have a horizontally long rectangular shape in plan view and are formed to have substantially the same vertical and horizontal dimensions. In FIG. 5A, the short sides are connected to each other, and in FIG. 5B, the long sides are connected to each other.

  The main tank unit 50 accommodates the first hot water storage tank 16A and the second hot water storage tank 16B at a predetermined interval from each other, and these tanks 16A and 16B are located at positions slightly deviated from the lateral center position. Placed in. Similarly, in the sub-tank unit 100, the first sub-hot water storage tank 16C and the second sub-hot water storage tank 16D are accommodated at a predetermined interval from each other, and the tanks 16C and 16D are somewhat displaced from the lateral center position. Placed in a different position.

  Utilizing the space that is generated when the hot water storage tanks 16 </ b> A to 16 </ b> D are displaced from each other, the above-mentioned pipes and pipe fittings (pipe connection parts) are collected in the corner part K of the units 50 and 100. Be contained. That is, the piping work of the main tank unit 50 and the sub tank unit 100 with respect to the heat pump heat source apparatus 1 can be handled regardless of how the tank units 50 are arranged. Furthermore, there is no problem even if a separate sub tank unit is added.

Although not shown in particular, by inserting a cushioning material between the main tank unit 50 and the sub tank unit 100, the non-uniformity of the gap between the tank units 50 and 100 is eliminated, and there is no problem in appearance, and chatter noise is generated. To prevent the occurrence of
Moreover, in the heat pump hot water supply apparatus demonstrated above, although the single main tank unit 50 was connected with respect to the single heat pump type heat source machine 1, it is not limited to this, A plurality with respect to the main tank unit 50 These heat pump heat source machines 1 may be connected in parallel.

In this case, if the heat pump heat source devices 1 having different capacities are prepared and combined, the heat capacity of the heat pump heat source device 1 is plural, and the tank capacity of the main tank unit 50 and the sub tank unit 100 is increased. Since there are many different combinations, many more combinations are obtained.
And the defrost corresponding | compatible circuit 37A in the main duct unit 50 can guide | inject high temperature water to each water heat exchanger 6 at the time of the defrost operation of the outdoor heat exchanger 9 which comprises each heat pump type heat source apparatus 1. FIG. Thus, it goes without saying that it is provided corresponding to the number of heat pump heat source units 1.
Note that the present invention is not limited to the above-described configuration, and various modifications can be made without departing from the scope of the present invention.

The schematic piping block diagram of the heat pump hot-water supply apparatus based on Example 1 of this invention. The schematic piping block diagram of the heat pump hot-water supply apparatus based on Example 2 of this invention. The schematic block diagram of the heat pump hot-water supply apparatus based on the Example 2. FIG. The schematic piping block diagram of the heat pump hot-water supply apparatus which concerns on the modification of the Example 2. FIG. The arrangement block diagram of the heat pump hot-water supply apparatus based on the Example 2. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 7 ... Compressor, 6 ... Water heat exchanger, 1 ... Heat pump type heat source machine, 16A ... 1st hot water storage tank, 16B ... 2nd hot water storage tank, b ... Discharge part (of water heat exchanger), 31a ... High temperature Water supply pipe, a ... suction part (of the water heat exchanger), 23 ... Low temperature water supply pipe, 38a, 38b ... Inter-tank connection pipe, 40 ... Auxiliary pipe, 25 ... Water supply pipe, 50 ... Main tank unit, 16C ... 1st sub hot water storage tank, 16D ... 2nd sub hot water storage tank, 31b ... High temperature water supply pipe, 25a ... Low temperature water supply pipe, 46 ... Inter-tank connection pipe, 100 ... Sub tank unit.

Claims (5)

A heat pump heat source device having a water heat exchanger that exchanges heat between the compressed refrigerant discharged from the compressor constituting the heat pump refrigeration cycle and the supplied water, and heats the supplied water to high-temperature water (hot water);
A plurality of hot water storage tanks housed in a housing, one end is connected to the top of one hot water storage tank, the other end is connected to the discharge part of the water heat exchanger, one end is the bottom of the other hot water storage tank A low temperature water supply pipe connected at the other end to the suction part of the water heat exchanger, an inter-tank connection pipe connected to the bottom of one hot water storage tank and the upper part of the other hot water storage tank, an inter-tank connection Auxiliary piping that is interposed in the piping and can maintain or disconnect the piping connection between the hot water storage tanks, one hot water supply pipe connected to the upper part of one hot water storage tank and the other to the hot water supply port, one end of the other hot water storage tank A main tank unit including a water supply pipe connected to the bottom and connected to the water source at the other end; and
A plurality of sub hot water storage tanks housed in the housing, one end of the hot water supply pipe connected to the upper part of the sub hot water storage tank , one end of the low temperature water supply pipe connected to the bottom of the other sub hot water storage tank, A sub tank unit having an inter-tank connecting pipe connected to the bottom of the sub hot water storage tank and the upper part of the other sub hot water storage tank ;
An extension pipe for connecting one end of an inter-tank connection pipe connected to the upper part of the other hot water storage tank of the main tank unit and one end of a low temperature water supply pipe connected to the bottom of the other sub hot water storage tank of the sub tank unit; ,
An extension pipe for connecting one end of an inter-tank connection pipe connected to the bottom of one hot water storage tank of the main tank unit and one end of a high-temperature water supply pipe connected to the upper part of one sub hot water storage tank of the sub tank unit; ,
A heat pump hot-water supply device comprising:   The said main tank unit is equipped with the defrost response | compatibility circuit which guides high temperature water to the said water heat exchanger at the time of the defrost operation of the outdoor heat exchanger which comprises the said heat pump type heat source apparatus. Heat pump water heater.   The main tank unit and the sub tank unit have a horizontally long rectangular shape in plan view, and the piping and the pipe connecting portion are accommodated in each corner portion, and the short side portions or the long side portions are connected to each other. The heat pump hot-water supply apparatus according to claim 1, wherein the heat pump hot-water supply apparatus is arranged to be possible.   The heat pump hot water supply device according to claim 1, wherein a plurality of the heat pump heat source devices are arranged and connected in parallel to the main tank unit.   The main tank unit includes defrosting-compatible circuits that lead high-temperature water to each water heat exchanger during the defrosting operation of the outdoor heat exchanger that configures each heat pump heat source unit, as many as the number of heat pump heat source units. The heat pump hot-water supply apparatus of Claim 4 characterized by the above-mentioned.

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