WO2013061473A1

WO2013061473A1 - Hot-water supply and air-conditioning device

Info

Publication number: WO2013061473A1
Application number: PCT/JP2011/075003
Authority: WO
Inventors: 陽子國眼; 小谷　正直
Original assignee: 株式会社日立製作所
Priority date: 2011-10-28
Filing date: 2011-10-28
Publication date: 2013-05-02
Also published as: JP5775596B2; JPWO2013061473A1

Abstract

Provided is a hot-water supply and air-conditioning device with which the overall system efficiency is improved with a simple configuration. The present invention is equipped with: a hot-water supply refrigerant circuit (20), in which a first refrigerant circulates, and which is formed by connecting in a loop a hot-water supply compressor (21), a hot-water supply usage-side heat exchanger (22), a hot-water supply decompression device (23), and a hot-water supply heat-source-side heat exchanger (11); and an air-conditioning refrigerant circuit (30), in which a second refrigerant circulates, and which is formed by connecting in a loop an air-conditioning compressor (31), a flow path switching means (32), an air-conditioning usage-side heat exchanger (33), an air-conditioning decompression device (34), and an air-conditioning heat-source-side heat exchanger (11). The hot-water supply heat-source side heat exchanger (11) and the air-conditioning heat-source-side heat exchanger (11) are integrated by inserting a hot-water supply heat transfer pipe (21a) of the hot-water supply heat-source side heat exchanger (11) and an air-conditioning heat transfer pipe (31a) of the air-conditioning heat-source-side heat exchanger (11) through multiple fins, which are stacked in an approximately parallel manner with prescribed intervals therebetween.

Description

Hot water supply air conditioner

The present invention relates to a hot water supply air conditioning apparatus that performs hot water supply and air conditioning.

As a hot water supply air conditioning apparatus which performs hot water supply and air conditioning, for example, a technology shown in Patent Document 1 is disclosed. That is, in Patent Document 1, a cascade heat exchanger is used as a second heat exchanger of the refrigerant circuit for hot water supply, and the cascade heat exchanger is connected to the refrigerant circuit for air conditioning to perform dual heat pump cycle operation. The system (hot water supply air conditioner) is described. In addition, according to Patent Document 1, when frost formation occurs in the outdoor heat exchanger (hot water supply heat source side heat exchanger) during the hot water storage operation, the circulation of the refrigerant in the air conditioning refrigerant circuit is reverse cycle (that is, The technology of performing the defrosting operation by setting the cycle of the cooling operation) is described.

Further, Patent Document 2 describes an air conditioner having a plurality of refrigerant circuits (air conditioning refrigerant circuits) and integrally mounting indoor heat exchangers of the respective refrigerant circuits in an indoor unit. Further, according to Patent Document 2, when any one frost detection means detects frost during the heating operation, the operation of the refrigerant circuit that detected frost formation is stopped, and the four-way valve is switched to perform the defrosting operation. It describes about the technique which raises the compression capability of the other refrigerant | coolant circuit, and prevents the fall of heating capacity.

Unexamined-Japanese-Patent No. 2004-132647 JP 2003-106712

However, in the technology described in Patent Document 1, it is premised that the hot water supply operation is performed in the late-night time zone when the air conditioning operation is unnecessary, and the defrost operation when the hot water supply operation and the air conditioning operation are simultaneously performed. There is a problem that is not considered. Moreover, in the technique described in Patent Document 1, the heating operation is stopped during the defrosting operation. Therefore, the efficiency of the entire air conditioning and hot water supply system is lowered, and the comfort in the room (air conditioned space) may be impaired.

In the technology described in Patent Document 2, a compressor (air conditioning compressor), a four-way valve, an outdoor heat exchanger (air conditioning heat source side heat exchanger), and an expansion valve (air conditioning expansion valve) In order to provide a plurality of outdoor units, the installation volume may increase and the manufacturing cost may increase. In addition, when performing the defrosting operation, the operation of one refrigerant circuit is stopped and the heating operation is performed by the other refrigerant circuit, so when the air conditioning load is large, the room (air conditioned space) may be sufficiently warmed. It may not be possible, and there is a possibility that the comfort in the room may be impaired.

Then, this invention makes it a subject to provide the hot-water supply air conditioning apparatus which improved the efficiency of the whole system by easy structure.

In order to solve the above problems, the present invention is configured by annularly connecting a hot water supply compressor, a hot water supply use side heat exchanger, a hot water supply pressure reduction device, and a hot water supply heat source side heat exchanger, A hot water supply refrigerant circuit through which the refrigerant circulates is provided, and an air conditioning compressor, a flow path switching means, an air conditioning utilization side heat exchanger, an air conditioning pressure reduction device, and an air conditioning heat source side heat exchanger are annularly connected. And a refrigerant circuit for air conditioning in which a second refrigerant circulates, wherein the hot water supply heat source side heat exchanger and the air conditioning heat source side heat exchanger are each capable of exchanging heat with outdoor air And the hot water supply heat source side heat exchanger and the air conditioning heat source side heat exchanger are in thermal contact with each other.

According to the present invention, it is possible to provide a hot water supply air conditioning apparatus in which the efficiency of the entire system is improved with a simple configuration.

It is a block diagram of the hot-water supply air conditioner which concerns on 1st Embodiment of this invention. It is a schematic block diagram of a heat source side heat exchanger. It is a side view which shows the example of the heat source side heat exchanger at the time of making the heat transfer pipe for hot water supply and the heat transfer pipe for air conditioning into a 2 step | paragraph structure. It is a schematic block diagram of the heat-source side heat exchanger of the hot-water supply air conditioning apparatus which concerns on 2nd Embodiment of this invention. It is a schematic block diagram of the heat-source side heat exchanger of the hot-water supply air conditioning apparatus which concerns on 3rd Embodiment of this invention. It is a block diagram of the hot-water supply air conditioner which concerns on 4th Embodiment of this invention. It is a flowchart which shows the flow of the mode determination process in hot-water-supply cooling operation. It is a block diagram which shows the flow of the refrigerant | coolant of the hot-water supply air conditioning apparatus in heat-supply / cooling operation (exhaust heat recovery A) mode, a heat transport medium, and to-be-heated liquid. It is a block diagram which shows the flow of the refrigerant | coolant of the hot-water supply air conditioning apparatus in a hot-water-supply cooling operation (exhaust-heat collection | recovery B) mode, a heat transport medium, and a to-be-heated liquid. It is a block diagram which shows the flow of the refrigerant | coolant of the hot-water supply air conditioning apparatus in heat-supply / cooling operation (exhaust-heat collection | recovery C) mode, a heat transport medium, and to-be-heated liquid. It is a block diagram of the hot-water supply air conditioner which concerns on 5th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the part which is common in each figure, and the duplicate description is abbreviate | omitted.

First Embodiment
<Configuration of hot water supply air conditioner>
FIG. 1 is a block diagram of a hot water supply air conditioner according to a first embodiment of the present invention. As shown in FIG. 1, the hot water supply air conditioner S1 includes an outdoor unit 100 installed outside the room (outside the air conditioned space), an indoor unit 200 installed indoors (in the air conditioned space), and a control device 60. Is equipped.

The hot water supply air-conditioning apparatus S1 heats a liquid to be heated (for example, water) and supplies a high temperature heated liquid to the hot water storage tank 42. A “hot water supply operation” cools the room in which the indoor unit 200 is installed "Doing heating operation" which heats the room where indoor unit 200 was installed, "hot-water supply cooling operation" which performs hot-water supply operation and cooling operation, "hot-water supply heating operation" which performs hot-water supply operation and heating operation It has a function.

Further, the hot water supply air conditioning apparatus S1 includes a hot water supply refrigerant circuit 20 in which a first refrigerant circulates, an air conditioning refrigerant circuit 30 in which a second refrigerant circulates, a hot water supply circuit 40 through which a liquid to be heated flows, and a heat transfer medium. And a circulating heat transfer medium circulation circuit 50.

<Refrigerant circuit for hot water supply>
The hot water supply refrigerant circuit 20 provided in the outdoor unit 100 includes a hot water supply compressor 21, a primary heat transfer pipe 22 a for the hot water use side heat exchanger 22, an expansion valve 23 for hot water supply, and the heat source side heat exchanger 11. The hot water supply heat transfer pipe 21a is connected in an annular manner by piping.

The hot water supply compressor 21 is a compressor that compresses the first refrigerant to be a high-temperature and high-pressure refrigerant. Incidentally, as the hot water supply compressor 21, a piston type, a rotary type, a scroll type, a screw type, a centrifugal type or the like can be used.
The hot water use side heat exchanger 22 is a heat exchanger that performs heat exchange between the first refrigerant flowing through the primary heat transfer pipe 22a and the liquid to be heated flowing through the secondary heat transfer pipe 22b.
The hot water supply expansion valve 23 functions as a pressure reducing device that reduces the pressure of the first refrigerant.

The heat source side heat exchanger 11 exchanges heat between the first refrigerant flowing through the heat transfer pipe 21a and the air (outdoor air) sent from the hot water supply fan 24, and flows through the heat transfer pipe 21a. The heat exchanger performs heat exchange between the first refrigerant and the second refrigerant flowing through the air conditioning heat transfer pipe 31a.
The heat source side heat exchanger 11 also exchanges heat between the second refrigerant flowing through the heat transfer pipe 31 a and the air (outdoor air) sent from the air conditioning fan 35.
The details of the heat source side heat exchanger 11 will be described later.

By the way, HFC, HFO-1234yf, HFO-1234ze, a natural refrigerant (for example, a CO ₂ refrigerant) or the like can be used as the _first refrigerant.

<Air conditioning refrigerant circuit>
The air conditioning refrigerant circuit 30 provided in the outdoor unit 100 includes an air conditioning compressor 31, a four-way valve 32, a primary heat transfer pipe 33a for air conditioning utilization side heat exchanger 33, an air conditioning expansion valve 34, and a heat source side. The air-conditioning heat transfer pipe 31 a of the heat exchanger 11 is annularly connected by piping.

The air conditioning compressor 31 is a compressor that compresses the second refrigerant into a high-temperature and high-pressure refrigerant. Incidentally, as the air conditioning compressor 31, a piston type, a rotary type, a scroll type, a screw type, a centrifugal type or the like can be used.
The four-way valve 32 is a four-way valve that switches the direction of the second refrigerant flowing through the primary heat transfer pipe 33 a of the air conditioning utilization side heat exchanger 33 between the cooling operation and the heating operation.
That is, the low-temperature low-pressure second refrigerant expanded by the air conditioning expansion valve 34 during cooling operation flows into the primary heat transfer pipe 33 a of the air conditioning utilization side heat exchanger 33 by switching the four-way valve 32. Further, during the heating operation, the high temperature and high pressure second refrigerant compressed by the air conditioning compressor 31 flows into the primary side heat transfer pipe 33 a of the air conditioning utilization side heat exchanger 33.

The air conditioning utilization side heat exchanger 33 is a heat exchanger that performs heat exchange between the second refrigerant flowing through the primary heat transfer pipe 33a and the heat transport medium flowing through the secondary heat transfer pipe 33b.
The air conditioning expansion valve 34 functions as a pressure reducing device that reduces the pressure of the second refrigerant.
Further, as described above, the heat source side heat exchanger 11 performs heat exchange between the air (outdoor air) sent from the air conditioning fan 35 and the second refrigerant flowing through the air conditioning heat transfer pipe 31a.

As the second refrigerant, R410A, HFC, HFO-1234yf, HFO-1234ze, a natural refrigerant (for example, a CO ₂ refrigerant) or the like can be used.

(Heat source side heat exchanger)
Here, the heat source side heat exchanger 11 will be described in detail. FIG. 2 is a schematic configuration diagram of the heat source side heat exchanger. In FIG. 2, the heat transfer pipe 21a for hot water supply is shown by hatching.
The heat source side heat exchanger 11 is provided for each of the plurality of plate-like fins 11 f stacked substantially in parallel at predetermined intervals, more than the pipe diameter of the heat transfer pipe (heat transfer pipe 21 a for hot water supply and heat transfer pipe 31 a for air conditioning). A plurality of circular holes (not shown) of slightly smaller diameter are provided, and the heat transfer pipe 21a for hot water supply and the heat transfer pipe 31a for air conditioning are made to penetrate through the circular holes.
Each plate-like fin 11 f is installed such that the heat transfer surface thereof is substantially in the vertical direction (vertical direction).

In the heat source side heat exchanger 11, heat exchange between the first refrigerant flowing through the heat transfer pipe 21a for hot water supply and the outdoor air, the first refrigerant flowing through the heat transfer pipe 21a for hot water supply, and the heat transfer pipe 31a for air conditioning Heat exchange with the second refrigerant and heat exchange between the second refrigerant flowing through the heat transfer pipe 31a for air conditioning and the outdoor air are performed.
Incidentally, the plate-like fins 11 f are thin metal plates, and stainless steel fins, aluminum fins, copper fins, galvanized fins, etc. can be used, but the present invention is not limited to these.

The heat transfer pipe 21a for hot water supply is a linear heat transfer pipe 21s ₁ , 21s ₂ ,..., 21s _k (hereinafter referred to as “linear first heat transfer pipe 21s”), and a heat transferable transfer pipe for connection. comprising heat pipes _21c _1, 21c 2, · · ·, 21c _h (hereinafter. referred to as "first heat exchanger tube 21c for connection") and, the.
Further, the air-conditioning heat exchanger tube 31a is linear air-conditioning heat-transfer tubes _31s _1, 31s 2, · · ·, 31s _m (hereinafter, referred to as "straight second heat exchanger tube 31s".) And air conditioning for connection comprising use heat transfer tube _31c _1, 31c 2, · · ·, 31c _n (hereinafter. referred to as "the second heat exchanger tube 31c for connection") and, the.

The linear first heat transfer pipes 21s and the linear second heat transfer pipes 31s penetrate the plate-like fins 11f so as to be substantially perpendicular to the heat transfer surfaces (vertical direction) of the plurality of plate-like fins 11f. That is, the linear first heat transfer pipe 21s and the linear second heat transfer pipe 31s are installed substantially horizontally.

Then, as shown in FIG. 2, straight first

heat exchanger tube

21s ₁ and _21s 2, 21s ₂ and _{_{21s 3, ···, 21s k-}} 1 and 21s _k is first heat exchanger tube _21c 1, 21c for connection _2,..., it is connected by 21c _h. Thus, the heat transfer pipe 21a forms a flow path (flow path of the first refrigerant) that meanders through the plurality of plate-like fins 11f.
Also, the linear second

heat exchanger tube

31s ₁ and _31s 2, 31s ₂ and _{_{31s 3, ···, 31s m-}} 1 and 31s _m, the second heat exchanger tube _31c for connection _1, 31c 2, · · ·, 31c It is connected by _n . Thus, the air conditioning heat transfer pipe 31a forms a flow path (flow path of the second refrigerant) that meanders through the plurality of plate-like fins 11f.

FIG. 2 shows the case where the number of linear first heat transfer tubes 21s is 12 (k = 12) and the number of linear second heat transfer tubes 31s is 12 (m = 12). It is not limited. The same applies to the heat source

side heat exchangers

11B and 11C of the hot water supply air conditioner according to the second embodiment and the third embodiment described later.

The hot water supply fan 24 (see FIG. 1) is installed corresponding to the installation position of the hot water supply heat transfer pipe 21a. Further, the hot water supply fan 24 is installed such that the flow direction of the air blown from the hot water supply fan 24 is substantially parallel to the heat transfer surface of each plate-like fin 11 f.
The air conditioning fan 35 (see FIG. 1) is installed corresponding to the installation position of the air conditioning heat transfer pipe 31a. Further, the air conditioning fan 35 is installed such that the flow direction of the air blown from the air conditioning fan 35 is substantially parallel to the heat transfer surface of each plate-like fin 11 f.

Further, as shown in FIG. 2, in the heat source side heat exchanger 11, the heat transfer pipe 21 a for hot water supply is installed above the heat transfer pipe 31 a for air conditioning.
In addition, said "installing above" does not mean that all the linear 1st heat-transfer tubes 21s are installed above the linear 2nd heat-transfer tubes 31s.

FIG. 3 is a side view showing an example of the heat source side heat exchanger in the case where the heat transfer pipe for hot water supply and the heat transfer pipe for air conditioning have a two-stage configuration. In FIG. 3, the solid line indicates that the heat transfer pipe (heat transfer pipe 21a for hot water supply or heat transfer pipe 31a for air conditioning) turns to the near side of the drawing, and the dotted line indicates that the heat transfer pipe turns on the back side of the drawing Is shown.

In the heat source side heat exchanger 11A shown in FIG. 3, a plurality of plate-like fins 11f stacked in parallel are arranged in two rows. Then, the heat transfer pipe 21a meanders downward while penetrating the plurality of plate-like fins 11f in the first row (left side), turns from position A to position B, and turns the plurality of plates in the second row (right side) It is configured to meander upward while penetrating the fin 11f.
Further, the heat transfer pipes 31a for air conditioning meander downward from the position C at the first row (left side) while penetrating the plurality of plate fins 11f, and further penetrate the plate fins 11f of the second row (right side) It is configured to meander upward and to come out of the hole at position D.

When the paths of the heat transfer pipe 21a for hot water supply and the heat transfer pipe 31a for air conditioning are arranged as shown in FIG. 3, the height of the position B of the lowermost part of the heat transfer pipe 21a for hot water is the position C of the uppermost part of the heat transfer pipe 31a for air conditioning. It is lower than the height of the
In this embodiment, this case is also included when the heat transfer pipe 21a for hot water supply is installed above the heat transfer pipe 31a for air conditioning. That is, in the heat source side heat exchanger 11 (11A), the entire body of the heat transfer pipe 21a for hot water supply is installed above the overall body of the heat transfer pipe 31a for air conditioning.

<Hot water supply circuit>
Returning to FIG. 1 again, the description of the hot water supply air conditioner S1 will be continued. The hot water supply circuit 40 provided in the outdoor unit 100 includes a first pump 41, a secondary heat transfer pipe 22b of the hot water use side heat exchanger 22, a three-way valve 45, a hot water storage tank 42, and a three-way valve 43. It is connected by piping in a loop.

The first pump 41 is a pump that pumps up the liquid to be heated from the hot water storage tank 42 and pumps it toward the secondary heat transfer pipe 22 b of the hot water use side heat exchanger 22.
The hot water storage tank 42 stores the liquid to be heated, and is covered with a heat insulating material (not shown).
The three-

way valves

43 and 45 are three-way valves configured to be able to adjust the flow rate ratio of the heated liquid flowing therethrough.

The outdoor unit 100 also includes three-

way valves

44 and 46, a water supply fitting 101, and a hot water supply fitting 102.
One end of the water supply fitting 101 is connected to the three-way valve 46, and the other end is connected to a water supply terminal (not shown). When the user opens the hot water supply terminal (not shown), the heated fluid (water) flows into the lower part of the hot water storage tank 42 through the water supply fitting 101 by the pressure from the water supply source. ing.

The three-

way valves

44 and 46 are three-way valves configured to be able to adjust the flow rate ratio of the heated liquid flowing therethrough, and are mutually connected via a pipe 47 a. Then, the heated liquid (water) having a flow rate corresponding to the opening degree of each of the three-

way valves

44 and 46 flows in via the pipe 47a, so that the high-temperature heated liquid supplied from the hot water storage tank 42 becomes an appropriate temperature. It is supposed to be adjusted.
One end of the hot water supply fitting 102 is connected to the three-way valve 44, and the other end is connected to a hot water supply terminal (not shown). When the user opens the hot water supply terminal, the liquid to be heated (hot water) whose temperature has been adjusted is supplied to the hot water supply terminal via the hot water supply fitting 102.

<Heat transfer medium circulation circuit for air conditioning>
The heat transfer medium circulation circuit 50 for air conditioning provided from the outdoor unit 100 to the indoor unit 200 includes the second pump 51, the secondary heat transfer pipe 33 b of the air conditioning use side heat exchanger 33, and the indoor heat exchanger 52. And are annularly connected by piping.

The first pump 51 is a pump that pumps the heat transfer medium flowing from the indoor heat exchanger 52 toward the secondary heat transfer pipe 33 b of the air conditioning utilization side heat exchanger 33.
The indoor heat exchanger 52 is a heat exchanger that exchanges heat between the air (room air) sent from the indoor fan 53 and the heat transfer medium.
As the heat transfer medium, brine (antifreeze) such as ethylene glycol or water can be used.

<Control device>
In addition, the hot water supply air conditioning device S1 includes a control device 60.
Control device 60 determines the operation mode of hot water supply air conditioning device S1, and according to the determined operation mode, the state (open of expansion valves 23, four-way valve 32, air conditioning expansion valve 34, three-way valves 43 to 46) for hot water supply Degrees, rotational speed of compressor (hot water supply compressor 21, air conditioning compressor 31), rotational speed of fans of each heat exchanger (hot water supply fan 24, air conditioning fan 35, indoor fan 53), pump It has a function of controlling the rotational speed of the first pump 41 and the second pump 51) to control various operations of the hot water supply air conditioning system S1.

(1. Hot water supply operation mode)
Next, the operation in each operation mode of the hot water supply air conditioner S1 will be described.
The hot water supply operation mode is an operation mode for heating a liquid to be heated (for example, water) and supplying a high temperature liquid to the hot water storage tank 42. In this mode, the air conditioning refrigerant circuit 30 and the air conditioning heat transfer medium circulation circuit 50 are stopped.
The hot water supply refrigerant circuit 20 will be described. The control device 60 controls the opening degree (throttle) of the hot water supply expansion valve 23 and controls the rotational speeds of the hot water supply compressor 21 and the hot water supply fan 24.

The high-temperature and high-pressure first refrigerant discharged from the hot water supply compressor 21 flows into the primary-side heat transfer pipe 22 a of the hot water use side heat exchanger 22 functioning as a condenser. The first refrigerant flowing through the primary side heat transfer pipe 22a of the hot water use side heat exchanger 22 dissipates heat by heat exchange with the liquid to be heated flowing through the secondary side heat transfer pipe 22b, and the medium temperature high pressure first It becomes a refrigerant.
The medium-temperature and high-pressure first refrigerant flowing out of the primary-side heat transfer pipe 22a of the hot-water supply utilization side heat exchanger 22 is decompressed by the hot-water supply expansion valve 23, and becomes a low-temperature and low-pressure first refrigerant.

Then, the low-temperature low-pressure first refrigerant flows into the hot water heat transfer heat transfer pipe 21 a of the heat source side heat exchanger 11 functioning as an evaporator. The first refrigerant flowing through the heat transfer pipe 21a of the heat source side heat exchanger 11 exchanges heat with the air (outdoor air) sent by the hot water supply fan 24, thereby drawing heat from the air (heat absorption (heat absorption) To do). Then, the first refrigerant that has absorbed heat is sent from the heat source side heat exchanger 11 to the hot water supply compressor 21 and circulates through the hot water supply refrigerant circuit 20.

Next, the hot water supply circuit 40 will be described. The hot water supply circuit 40 is similar to a general hot water storage type hot water supply device, and hence the description is simplified below.
The control device 4 controls the rotational speed of the first pump 41.
By driving the first pump 41, the liquid to be heated drawn from the hot water storage tank 42 flows into the secondary heat transfer pipe 22b of the hot water use side heat exchanger 22. The heated liquid flowing through the secondary heat transfer pipe 22b of the hot water use side heat exchanger 22 absorbs heat by exchanging heat with the first refrigerant flowing through the primary heat transfer pipe 22a, and is heated with a high temperature heated liquid Become. Then, the high-temperature liquid to be heated is returned from the secondary heat transfer pipe 22b of the hot water supply utilization side heat exchanger 22 to the hot water storage tank 42 and stored.

When the first refrigerant flowing through the heat transfer tube 21a of the heat source side heat exchanger 11 exchanges heat with the air (outdoor air) sent by the hot water supply fan 24, the heat transfer tube 21a for hot water supply Heat exchange is possible not only in the plate-like fins 11f in the portion where the heat sink is installed, but also in the plate-like fins 11f in the portion where the heat transfer pipe 31a for air conditioning is installed. This is because, as shown in FIG. 2, the heat transfer pipe 21a for hot water supply and the heat transfer pipe 31a for air conditioning are penetrated by the common plate-like fins 11f, so that the heat source side heat exchanger for hot water supply and the heat source side heat for air conditioning This is because the exchange unit is integrated.

Therefore, the heat transfer area in the heat source side heat exchanger 11 is larger than in the case where the heat source side heat exchanger for hot water supply and the heat source side heat exchanger for air conditioning are separated, and the heat transfer performance is improved. As a result, the rotational speeds of the hot water supply compressor 21 and the hot water supply fan 24 can be reduced, and the efficiency of the entire system can be improved.

(1-1. Defrosting operation)
When outdoor air is at low temperature and high humidity in winter, etc., the portion where the heat transfer pipe 12a for hot water supply is installed by causing the first low temperature refrigerant to flow through the heat transfer pipe 21a of the heat source side heat exchanger 11 The plate-like fins 11 f of the In this case, the control device 60 operates in the same manner as the cooling operation described later for the air conditioning refrigerant circuit 30 according to a signal input from the frost detection means (temperature sensor etc .: not shown) installed in the outdoor unit 100. The operation is performed, and the high temperature second refrigerant is sent to the air conditioning heat transfer pipe 31 a in the heat source side heat exchanger 11.
Incidentally, the hot water supply air-conditioning apparatus S1 continues the hot water supply operation while performing the defrosting operation.

As described above, in the heat source side heat exchanger 11, two heat exchangers (that is, the heat source side heat exchanger for hot water supply and the heat source side heat exchanger for air conditioning) are integrated. That is, the plate-like fins 11f of the portion where the heat transfer tubes 21a are installed and the plate-like fins 11f of the portions where the heat transfer tubes 31a for air conditioning are installed are continuous (see FIG. 2).
Therefore, the heat from the high temperature second refrigerant passing through the air conditioning heat transfer pipe 31a is transmitted through the plate-like fins 11f to melt the frost adhering to the plate-like fins 11f of the portion where the heat transfer heat transfer tube 21a is installed. Can.

Further, as shown in FIG. 2, in the heat source side heat exchanger 11, the heat transfer pipe 21a for hot water supply is installed above the heat transfer pipe 31a for air conditioning. The heat from the second refrigerant is released at the portion where the heat transfer pipe 31a for air conditioning is installed, and the heat rises, and the ambient temperature of the hot water supply fan 24 is raised. Therefore, the frost adhering to the plate-like fins 11f of the portion where the heat transfer pipe 21a is disposed can be rapidly melted by heating it with the heat from the second refrigerant and the outdoor air that has become hotter. it can.

Incidentally, although the control device 60 operates the air conditioning refrigerant circuit 30 in the same manner as the cooling operation during the defrosting operation, the operation of the air conditioning heat transfer medium circulation circuit 50 may be stopped. Because, the heat transfer medium in the secondary side heat transfer pipe 33b of the air conditioning use side heat exchanger 33 has a certain amount of heat, and flows through the primary side heat transfer pipe 33a of the air conditioning use side heat exchanger 33. This is because the two refrigerants absorb the heat.

If the second refrigerant can not be sufficiently evaporated by stopping the operation of the heat transfer medium circulation circuit 50 for air conditioning as described above when performing the defrosting operation, the controller 60 controls the second pump 51. Drive. In this case, the heat transfer medium circulates through the air conditioning heat transfer medium circulation circuit 50 by the second pump 51. Therefore, the heat of the heat transfer medium flowing through the secondary side heat transfer pipe 33b of the air conditioning utilization side heat exchanger 33 is transferred to the second refrigerant flowing through the primary side heat transfer pipe 33a to promote the defrosting operation. be able to.

In addition, when performing the defrosting operation, when the second refrigerant can not be sufficiently evaporated only by the driving of the second pump 51 as described above, the control device 60 further performs the air conditioning fan 53 at a predetermined rotation speed. Rotate. In this case, the heat of the indoor air can be pumped up by the indoor heat exchanger 52 by the rotation of the air conditioning fan 53. Therefore, the heat of the heat transfer medium flowing through the secondary side heat transfer pipe 33b of the air conditioning utilization side heat exchanger 33 is transferred to the second refrigerant flowing through the primary side heat transfer pipe 33a to further promote the defrosting operation It can be done.

(2. Cooling operation mode)
The cooling operation mode is an operation mode for cooling the room (air conditioned space) in which the indoor unit 200 is installed. In this mode, the hot water supply refrigerant circuit 20 and the hot water supply circuit 40 are stopped.
The air conditioning refrigerant circuit 30 will be described. The control device 60 controls the switching means (not shown) of the four-way valve 32 to be at the position of the cooling operation. Further, the control device 60 controls the opening degree (throttle) of the air conditioning expansion valve 34 and controls the rotational speeds of the air conditioning compressor 31 and the air conditioning fan 35.

The high temperature and high pressure second refrigerant discharged from the air conditioning compressor 31 flows into the air conditioning heat transfer pipe 31 a of the heat source side heat exchanger 11 functioning as a condenser via the four-way valve 32.
The second refrigerant flowing through the air conditioning heat transfer pipe 31a of the heat source side heat exchanger 11 releases heat (exhaust heat) by heat exchange with the air (outdoor air) sent by the air conditioning fan 35, and the medium temperature high pressure It becomes the second refrigerant of The medium-temperature high-pressure second refrigerant that has flowed out from the air conditioning heat transfer pipe 31 a of the heat source side heat exchanger 11 flows into the air conditioning expansion valve 34.

Then, the medium-temperature high-pressure second refrigerant is decompressed by the air conditioning expansion valve 34 and becomes a low-temperature low-pressure second refrigerant, and flows into the primary heat transfer pipe 33a of the air conditioning utilization side heat exchanger 33 functioning as an evaporator. The second refrigerant flowing through the primary side heat transfer pipe 33a of the air conditioning usage side heat exchanger 33 exchanges heat with the heat transfer medium flowing through the secondary side heat transfer pipe 33b, thereby drawing up heat from the heat transfer medium ( Heat absorption). Then, the second refrigerant that has absorbed heat is sent from the primary side heat transfer pipe 33a of the air conditioning utilization side heat exchanger 33 to the air conditioning compressor 31 via the four-way valve 32, and circulates through the air conditioning refrigerant circuit 30.

Next, the heat transfer medium circulation circuit 50 for air conditioning will be described. The controller 60 controls the rotational speeds of the second pump 51 and the indoor fan 53.
By driving the second pump 51, the heat transfer medium flows into the secondary heat transfer pipe 33 b of the air conditioning utilization side heat exchanger 33. The heat transfer medium flowing through the secondary side heat transfer pipe 33b of the air conditioning utilization side heat exchanger 33 dissipates heat (exhaust heat) by heat exchange with the second refrigerant flowing through the primary side heat transfer pipe 33a. Heat transfer medium.

Then, the low temperature heat transfer medium flows into the indoor heat exchanger 52 of the indoor unit 200. The heat transfer medium flowing through the indoor heat exchanger 52 absorbs heat by heat exchange with the air (indoor air) sent by the indoor fan 53. The heat transfer medium that has absorbed heat is sent from the indoor heat exchanger 52 to the second pump 51 and circulates through the air transfer heat transfer medium circulation circuit 50.
As described above, when the heat transfer medium absorbs heat by the indoor heat exchanger 52 of the indoor unit 2, the indoor air is cooled, and the room (air conditioned space) is cooled.

When the second refrigerant flowing through the air conditioning heat transfer pipe 31a of the heat source side heat exchanger 11 exchanges heat with the air (outdoor air) sent by the air conditioning fan 35, the air conditioning heat transfer pipe 31a Heat exchange is possible not only in the plate-like fins 11f in the portion where the heat sink is installed, but also in the plate-like fins 11f in the portion where the heat transfer pipe 21a is installed.
Therefore, compared with the case where the heat source side heat exchanger for hot water supply and the heat source side heat exchanger for air conditioning are separated, the heat transfer area in the heat source side heat exchanger 11 becomes larger, and the heat transfer performance is improved. As a result, the rotational speeds of the air conditioning compressor 31 and the air conditioning fan 35 can be reduced, and the efficiency of the entire system can be improved.

(3. heating operation mode)
The heating operation mode is an operation mode for heating the room (air conditioned space) in which the indoor unit 200 is installed. In this mode, the hot water supply refrigerant circuit 20 and the hot water supply circuit 40 are stopped.
The air conditioning refrigerant circuit 30 will be described. The control device 60 controls the switching means (not shown) of the four-way valve 32 to be at the position of the heating operation. Further, the control device 60 controls the opening degree (throttle) of the air conditioning expansion valve 34 and controls the rotational speeds of the air conditioning compressor 31 and the air conditioning fan 35.

The high temperature and high pressure second refrigerant discharged from the air conditioning compressor 31 flows into the primary heat transfer pipe 33 a of the air conditioning utilization side heat exchanger 33 functioning as a condenser via the four-way valve 32.
The second refrigerant flowing through the primary side heat transfer pipe 33a of the air conditioning utilization side heat exchanger 33 dissipates heat (exhaust heat) by heat exchange with the heat transfer medium flowing through the secondary side heat transfer pipe 33b, and the medium temperature high pressure It becomes the second refrigerant of The medium-temperature high-pressure second refrigerant flowing out from the primary-side heat transfer pipe 33 a of the air-conditioning use side heat exchanger flows into the air-conditioning expansion valve 34.

Then, the medium-temperature high-pressure second refrigerant is decompressed by the air conditioning expansion valve 34, becomes a low-temperature low-pressure second refrigerant, and flows into the air conditioning heat transfer pipe 31a of the heat source side heat exchanger 11 functioning as an evaporator. The low-temperature low-pressure second refrigerant flowing through the air-conditioning heat transfer pipe 31a of the heat source side heat exchanger 11 exchanges heat with the air (outdoor air) sent by the air-conditioning fan 35, thereby converting heat from the air Pump up (heat absorption). Then, the second refrigerant that has absorbed heat is sent from the heat transfer pipe 31 a for air conditioning of the heat source side heat exchanger 11 to the air conditioning compressor 31 via the four-way valve 32, and circulates through the air conditioning refrigerant circuit 30.

Next, the heat transfer medium circulation circuit 50 for air conditioning will be described. The control device 4 controls the rotational speed of the second pump 51 and the indoor fan 53.
By driving the second pump 51, the heat transfer medium flows into the secondary heat transfer pipe 33 b of the air conditioning utilization side heat exchanger 33. The heat transfer medium flowing through the secondary side heat transfer pipe 33b of the air conditioning utilization side heat exchanger 33 absorbs heat by exchanging heat with the second refrigerant flowing through the primary side heat transfer pipe 33a, and a high temperature heat transfer medium It becomes.

Then, the high-temperature heat transfer medium flows into the indoor heat exchanger 52 of the indoor unit 200. The heat transfer medium flowing through the indoor heat exchanger 52 dissipates heat by heat exchange with the air (indoor air) sent by the indoor fan 53. Then, the heat transfer medium that has dissipated heat is sent from the indoor heat exchanger 52 to the first pump 51 and circulates through the heat transfer medium circulation circuit 50 for air conditioning.
Thus, the heat transfer medium releases heat by the indoor heat exchanger 52 of the indoor unit 2 to heat the indoor air and heat the indoor space (air conditioned space).

(3-1. Defrosting operation)
When the outdoor air is at a low temperature and high humidity in winter, etc., the low temperature second refrigerant passes through the heat source side heat exchanger 11, whereby the plate-like fins 11f of the portion where the air conditioning heat transfer pipe 31a is installed is attached. To frost. In this case, the control device 60 sends the high temperature first refrigerant to the hot water heat transfer pipe 21 a of the heat source side heat exchanger 11 using the hot water supply refrigerant circuit 20.

Specifically, the control device 60 starts the hot water supply compressor 21 with the hot water supply expansion valve 23 fully opened, and sends the high temperature first refrigerant to the hot water supply heat transfer pipe 21 a. At this time, since the first pump 41 is stopped in the hot water supply circuit 40, the liquid to be heated is not cooled. Incidentally, the hot water supply air-conditioning apparatus S1 continues the heating operation while the defrosting operation is being performed.

Further, in the heat source side heat exchanger 11, the plate-like fins 11f of the portion where the heat transfer tube 21a for hot water supply is installed and the plate-like fins 11f of the portion where the heat transfer tube 31a for air conditioning are installed are continuous. . Therefore, the heat of the high temperature first refrigerant flowing through the heat transfer pipe 21a is transmitted to the plate-like fins 11f, and as a result, it is possible to melt the frost in the portion where the air conditioning heat transfer pipe 31a is installed.
While the defrosting operation is being performed, the hot water supply fan 24 of the hot water supply refrigerant circuit 20 is stopped. This is because when the hot water supply fan 24 is rotated, the first refrigerant flowing through the hot water supply heat transfer pipe 21 a dissipates heat by heat exchange with low temperature outdoor air.

(4. Hot water supply and cooling operation mode)
The hot water supply and cooling operation mode is an operation mode in which a hot water supply operation and a cooling operation are performed.
The operations in the hot water supply refrigerant circuit 20 and the hot water supply circuit 40 in the hot water supply and cooling operation mode are the same as those in the hot water supply operation mode described above, and the operations in the air conditioning refrigerant circuit 30 and the air conditioning heat transfer medium circulation circuit 50 are Since this is the same as the case of the cooling operation mode described above, the description will be omitted.
Hereinafter, heat exchange in the heat source side heat exchanger 11 will be described in detail.

In the hot water supply and cooling operation mode, the portion of the heat source side heat exchanger 11 where the heat transfer pipe 21a is installed functions as an evaporator of the first refrigerant, and the portion where the air conditioning heat transfer pipe 31a is installed is It functions as a two-refrigerant condenser.
The first refrigerant reduced in pressure by the hot water supply expansion valve 23 to a low temperature and low pressure flows into the hot water heat transfer pipe 21 a of the heat source side heat exchanger 11. Here, the high temperature second refrigerant discharged from the air conditioning compressor 31 flows through the air conditioning heat transfer pipe 31 a of the heat source side heat exchanger 11.

Therefore, the heat of the second refrigerant flowing through the air conditioning heat transfer pipe 31a of the heat source side heat exchanger 11 is transferred to the first refrigerant flowing through the hot water supply heat transfer pipe 21a via the plate-like fins 11f.
Further, since the air heated by heat exchange with the second refrigerant flowing through the air conditioning heat transfer pipe 31a rises, the ambient temperature of the hot water supply fan 24 installed above becomes high.
As a result, high temperature air is fed from the hot water supply fan 24 to the hot water supply heat transfer pipe 21a.

The first refrigerant flowing through the heat transfer pipe 21a of the heat source side heat exchanger 11 exchanges heat with the high temperature second refrigerant flowing through the heat transfer pipe 31a for air conditioning via the plate-like fins 11f, and It also exchanges heat with the high temperature air fed from the fan 24.
Therefore, the heat transfer performance of the heat transfer pipe 21a for hot water supply is improved, and the rotational speeds of the hot water supply compressor 21 and the hot water supply fan 24 can be reduced, so that the efficiency of the entire system can be improved.

Further, the high temperature and high pressure second refrigerant compressed by the air conditioning compressor flows into the air conditioning heat transfer pipe 31 a of the heat source side heat exchanger 11. Here, the low temperature first refrigerant pressure-reduced by the hot water supply expansion valve 23 flows through the hot water supply heat transfer pipe 21 a of the heat source side heat exchanger 11.
Therefore, the cold heat of the first refrigerant flowing through the heat transfer pipe 21a of the heat source side heat exchanger 11 is transferred to the second refrigerant flowing through the air conditioning heat transfer pipe 31a via the plate-like fins 11f.

In addition, since the air cooled by heat exchange with the low temperature first refrigerant flowing through the heat transfer pipe 21a is lowered, the ambient temperature of the air conditioning fan 35 installed below is lowered. As a result, low temperature air is fed from the air conditioning fan 35 to the air conditioning heat transfer pipe 31a.

The second refrigerant flowing through the air conditioning heat transfer pipe 31a of the heat source side heat exchanger 11 exchanges heat with the low temperature first refrigerant flowing through the hot water supply heat transfer pipe 21a via the plate-like fins 11f, and the air conditioning It also exchanges heat with the low temperature air fed from the fan 35.
Therefore, the heat transfer performance of the air conditioning heat transfer pipe 31a is also improved, and the rotational speeds of the air conditioning compressor 31 and the air conditioning fan 35 can be reduced, so that the efficiency of the entire system can be improved.

(4-1. Cooling by drain water)
When outdoor air is at high temperature and high humidity in summer, etc., when the low temperature first refrigerant flows through the hot water heat transfer pipe 21a of the heat source side heat exchanger 11 in the hot water supply refrigerant circuit 20, the hot water heat transfer pipe 21a is installed. Condensation occurs in the other parts, resulting in drain water.
The drain water descends along the plate-like fins 11 by gravity and reaches the portion where the air conditioning heat transfer pipe 31a is installed. Then, the drain water is heated by the high temperature second refrigerant at a portion where the air conditioning heat transfer pipe 31a is installed, and evaporates.
On the other hand, the high temperature second refrigerant is cooled by the latent heat when the drain water evaporates.

As described above, the high temperature second refrigerant flowing through the air conditioning heat transfer pipe 31a of the heat source side heat exchanger 11 is the low temperature first refrigerant flowing through the hot water supply heat transfer pipe 31a, and the outdoor air whose temperature has become lower. And the latent heat of vaporization by the drain water. Therefore, the heat transfer performance of the air conditioning heat transfer pipe 31a is improved, and the rotational speeds of the air conditioning compressor 31 and the air conditioning fan 35 can be further reduced, so that the efficiency of the entire system can be improved.

Further, as shown in FIG. 1, the heat source side heat exchanger 11 is provided with a drain pan 12 below the plate-like fins 11f. Therefore, the drain water reached to the lowest point of the plate-like fins 11 f is discharged from the drain pan 12 to the ground. As described above, since the heat source side heat exchanger 11 integrates the heat exchanger on the heat source side for hot water supply and the side heat exchanger for the air conditioning heat source, there is no need to provide a drain pan for each refrigerant circuit. And simplification of the component parts.

(5. Hot water supply heating operation mode)
The hot water supply heating operation mode is an operation mode in which the hot water supply operation and the heating operation are performed.
The operations in the hot water supply refrigerant circuit 20 and the hot water supply circuit 40 in the hot water supply heating operation mode are the same as those in the hot water supply operation mode described above, and the operations in the air conditioning refrigerant circuit 30 and the air conditioning heat transfer medium circulation circuit 50 are Since this is the same as the case of the heating operation mode described above, the description is omitted.
Hereinafter, heat exchange in the heat source side heat exchanger 11 will be described in detail.

In the hot water supply heating operation mode, the portion of the heat source side heat exchanger 11 where the heat transfer pipe 21a is installed functions as an evaporator of the first refrigerant, and the portion where the air conditioning heat transfer pipe 31a is installed is It functions as an evaporator for two refrigerants. That is, in the hot water supply heating operation mode, the heat source side heat exchanger 11 functions as an evaporator of the first refrigerant and the second refrigerant, and draws heat from the outdoor air.

The first refrigerant reduced in pressure by the hot water supply expansion valve 23 to a low temperature and low pressure flows into the hot water heat transfer pipe 21 a of the heat source side heat exchanger 11. Then, the first refrigerant flowing through the heat transfer pipe 21a of the heat source side heat exchanger 11 exchanges heat with the outdoor air fed from the hot water supply fan 24 to absorb heat and evaporate. Then, the first refrigerant flowing out of the heat transfer pipe 21 a of the heat source side heat exchanger 11 flows into the hot water supply compressor 21.

Further, the low temperature and low pressure second refrigerant, which has been decompressed by the air conditioning expansion valve 34, flows into the air conditioning heat transfer pipe 31 a of the heat source side heat exchanger 11. Then, the second refrigerant flowing through the air conditioning heat transfer pipe 31 a of the heat source side heat exchanger 11 exchanges heat with the outdoor air fed from the air conditioning fan 35 to absorb heat and evaporate. Then, the second refrigerant flowing out of the heat transfer pipe 31 a for air conditioning of the heat source side heat exchanger 11 flows into the air conditioning compressor 31.

(5-1. Defrosting operation)
Next, when the outdoor air has a low temperature and high humidity in winter, etc., the plate-like fins 11f of the portion where the heat transfer tube 21a is installed and the plate-like fins of the portion where the air conditioning heat transfer tube 31a is installed A case where at least one of the 11f is frosted will be described.
When the plate-like fins 11 f of the portion where the heat transfer pipe 21 a is installed in the heat source side heat exchanger 11 frosts, the control device 60 sets the heat transfer pipe 21 a of the heat source side heat exchanger 11 to a high temperature Control is made to flow a high pressure first refrigerant. Further, the control device 60 stops the first pump 41.
Thereby, it is possible to melt the frost attached to the plate-like fins 11 f while continuing the heating operation. Incidentally, since the first pump 41 is stopped during the defrosting operation, the liquid to be heated is not cooled.

Further, when the plate-like fins 11 f of the portion where the heat transfer pipe 31 a for air conditioning is installed in the heat source side heat exchanger 11 frosts, the control device 60 stops the driving of the first pump 41 of the hot water supply circuit 40. With the hot water supply expansion valve 23 of the hot water supply refrigerant circuit 20 fully opened, the hot water supply compressor 21 is activated to send the high temperature and high pressure first refrigerant to the hot water supply heat transfer pipe 21a.
The defrosting operation is the same as the defrosting operation in the heating operation mode, and thus the description thereof is omitted.

When both plate-like fins 11f of the portion where heat transfer tube 21a for hot water supply is installed and plate-like fins 11f of the portion where heat transfer tube 31a for air conditioning are installed, control device 60 It is prioritized to send the high temperature and high pressure first refrigerant to the heat transfer tube 21a. This is to maintain the comfort in the conditioned space by not interrupting the heating operation.
The processing of the control device 60 in this case is the same as the case where the plate-like fins 11 f of the portion of the heat source side heat exchanger 11 where the heat transfer pipe 31 a for air conditioning is installed in the heating operation mode. , I omit the explanation.

In this case, both the plate-like fins 11f in the portion where the heat transfer tubes 21a are installed and the plate-like fins 11f in the portions where the heat transfer tubes 31a for air conditioning are installed are frosted. When defrosting is insufficient only by passing the high temperature first refrigerant through the heat pipe 21a, the control device 60 performs air conditioning in combination with causing the hot water heat transfer pipe 21a to flow the high temperature first refrigerant. The high temperature second refrigerant is caused to flow through the heat transfer pipe 31a.
By this, it is possible to melt all the frost adhering to the plate-like fins 11 f.

In this case, the defrosting operation time using the hot water supply refrigerant circuit 20 and the defrosting operation time using the air conditioning refrigerant circuit 30 do not have to be the same. When the defrosting operation is performed using the air conditioning refrigerant circuit 30, the heating operation is stopped, so it is preferable that the defrosting operation time using the air conditioning refrigerant circuit 30 be shorter.

<Effect 1>
According to the hot water supply air-conditioning system S1 according to the present embodiment, it is possible to execute the hot water supply operation, the cooling operation, the heating operation, the hot water supply cooling operation, and the hot water supply heating operation according to the user's request.
In addition, when the hot water supply operation is performed, the plate-like fins 11f of the portion where the heat transfer pipe 31a for air conditioning is installed can also be used for heat transfer with the outdoor air. That is, the heat transfer area at the time of heat exchange with the outdoor air can be increased, and the heat transfer performance can be improved. Therefore, the rotational speeds of the hot water supply compressor 21 and the hot water supply fan 24 can be reduced, and the efficiency of the entire system can be improved.

Similarly, when the cooling operation or the heating operation is performed, the plate-like fins 11f of the portion where the heat transfer pipe 21a is installed can also be used for heat transfer with outdoor air. Therefore, it is possible to increase the heat transfer area when exchanging heat with outdoor air, to reduce the rotational speed of the air conditioning compressor 31 and the air conditioning fan 35, and to improve the efficiency of the entire system. Can.

Further, the heat source side heat exchanger 11 has a configuration in which the heat source side heat exchanger for hot water supply and the heat source side heat exchanger for air conditioning are integrated. Therefore, heat exchange can be performed between the first refrigerant circulating through the plate-like fins 11 f and the second refrigerant circulating through the air conditioning refrigerant circuit 30. That is, the heat source side heat exchanger 11 also functions as an intermediate heat exchanger that performs heat exchange between the first refrigerant and the second refrigerant.
Therefore, since the heat source side heat exchanger 11 also functions as a heat source side heat exchanger for hot water supply, a heat source side heat exchanger for air conditioning, and an intermediate heat exchanger, the hot water supply air conditioner S1 can be simplified. The construction can be made and the manufacturing cost can be reduced.

Further, when performing the air conditioning and cooling operation, exhaust heat from the second refrigerant circulating in the air conditioning refrigerant circuit 30 is supplied to the first refrigerant circulating in the hot water supply refrigerant circuit 20 through the plate-like fins 11 f. Can. Therefore, the efficiency of the entire system can be improved.

Further, when performing the defrosting operation, defrosting can be performed by sending a high temperature refrigerant using the circuit (the hot water supply refrigerant circuit 20 or the air conditioning refrigerant circuit 30) that is not frosted. Therefore, for example, even when the plate-like fins 11f of the portion where the heat transfer pipe 31a for air conditioning is installed is frosted while performing the heating operation, the defrosting operation can be performed while continuing the heating operation. The comfort in the room (in the air conditioned space) can be improved.

Further, in the heat source side heat exchanger 11, the heat transfer pipe 21a for hot water supply is installed above the heat transfer pipe 31a for air conditioning. Therefore, when the plate-like fins 11f of the portion where the heat transfer pipe 21a is installed condenses and drain water is generated while performing the hot-water supply cooling operation, the drain water causes the plate-like fins 11f by gravity. It descends. And since the said drain water is evaporated by the heat transfer pipe 31a for an air conditioning, it can absorb heat from the 2nd refrigerant | coolant which flows through the heat transfer pipe 31a for an air conditioning by latent heat of evaporation. Since the condensation function of the 2nd refrigerant of heat source side heat exchanger 11 increases by this, the efficiency as the whole system can be raised.

That is, according to the hot water supply air-conditioning apparatus S1 according to the present embodiment, the heat of the hot water supply and the air conditioning can be effectively used each other, and the efficiency of the entire system can be improved. In addition, since the system configuration is simple, the manufacturing cost can be reduced.

Second Embodiment
The hot water supply air conditioner according to the second embodiment differs from the hot water supply air conditioner S1 according to the first embodiment in the configuration of the heat source side heat exchanger 11B. About the other point, since it is the same as that of hot-water-supply air conditioner S1 which concerns on 1st Embodiment, description is abbreviate | omitted.
FIG. 4 is a schematic configuration diagram of a heat source side heat exchanger of the hot water supply air conditioner according to the second embodiment. In FIG. 4, the heat transfer pipe 21a for hot water supply is shown by hatching.

As shown in FIG. 4, the linear first heat transfer pipe 21 s and the linear second heat transfer pipe 31 s penetrate the plurality of plate-like fins 11 f perpendicularly to the heat transfer surface.
Then, the linear first heat transfer pipe 21s is connected to the heat transfer pipe for connection so that the first refrigerant flowing into the heat transfer pipe 21a for hot water supply splits as shown by the arrow in FIG. 4 and then merges.
Further, the linear second heat transfer pipe 31s is connected to the heat transfer pipe for connection so that the second refrigerant flowing into the heat transfer pipe 31a for air conditioning flows through the heat transfer pipe 31a for air conditioning as shown by the arrow in FIG. ing.

Further, as shown in FIG. 4, a linear first heat exchanger tube _{_{21s 1, 21s 2, ···,}} 21s k is a linear second heat exchanger tube _31s _1, 31s 2, · · ·, than 31s _m above It is installed to be located in Further, the linear first heat transfer tubes 21s _{k + 1} and 21s _{k + 2} are disposed below the linear second

heat transfer tubes

31s ₁ , 31s ₂ ,..., 31s _m .
Furthermore, the number (10 in FIG. 4) of straight heat transfer tubes 21s located above the straight heat transfer tubes 31s among the straight heat transfer tubes 21s is lower than the straight heat transfer tubes. This number is larger than the number of located ones (two in FIG. 4).

<Effect 2>
As described above, the linear second heat transfer pipe 31s is sandwiched between the linear first heat transfer pipe 21s at the upper and lower sides, whereby the first refrigerant flowing through the hot water supply heat transfer pipe 21a and the air conditioning heat transfer pipe 31a are Heat transfer with the flowing second refrigerant is further promoted. Therefore, the efficiency of the entire system can be improved.
Further, when performing the defrosting operation by letting the high temperature first refrigerant flow through the heat transfer pipe 21a for hot water supply, the heat of the first refrigerant is transmitted from the upper and lower sides of the air conditioning heat transfer pipe 21a. The defrosting operation can be completed in a short time.

Further, since the heat transfer pipe 21s for hot water supply installed above the linear air conditioning heat transfer pipe 31s is larger than the heat transfer pipe 21s for hot water supply installed at the lower part, in the hot water supply cooling operation mode, the heat transfer pipe 21a for hot water supply Cooling of the second refrigerant using the latent heat of vaporization of the generated drain water can be promoted.

Third Embodiment
FIG. 5: is a schematic block diagram of the heat-source side heat exchanger of the hot-water supply air conditioning apparatus which concerns on 3rd Embodiment. In FIG. 5, the heat transfer pipe 21a for hot water supply is shown by hatching.
The hot water supply air conditioner according to the third embodiment differs from the hot water supply air conditioner S1 according to the first embodiment in the configuration of the heat source side heat exchanger 11. The other points are the same as those of the hot water supply air-conditioning system S1 according to the first embodiment, so the description will be omitted.

As shown in FIG. 5, the linear first heat transfer pipe 21s and the linear second heat transfer pipe 31s penetrate the plurality of plate-like fins 11f perpendicularly to the heat transfer surface.
Then, the linear first heat transfer pipe 21s is connected to the heat transfer pipe 21c for connection so that the first refrigerant flowing into the heat transfer pipe 21a for hot water supply splits as shown in FIG. 5 and then merges. Further, as the second refrigerant flowing into the air conditioning heat transfer pipe 31a is branched as shown in FIG. 5, the straight second heat transfer pipe 31s is connected to the connection heat transfer pipe 31c so as to merge.

Also, the linear first heat exchanger tube _{_{21s 1, 21s 2, ···,}} 21s k is a linear second heat exchanger tube _31s _1, 31s 2, · · ·, are installed vertically alternately 31s _m. In addition, in this case, “installed alternately in the upper and lower directions” means two or more linear first heat transfer tubes 21s continuous in the upper and lower direction and two or more continuous in the upper and lower directions, in addition to the case of installing the upper and lower sides alternately one by one. It also includes the case where the linear second heat transfer pipes 31s are alternately installed. Further, “installed alternately in the vertical direction” is not limited to the case where the number of continuous linear first heat transfer tubes 21s is equal to the number of continuous linear second heat transfer tubes 31s.

Incidentally, FIG. 5 shows a case where two straight first heat transfer tubes 21s continuous in the upper and lower direction and two straight second heat transfer tubes continuous in the upper and lower direction are alternately installed.
Moreover, it is preferable that the thing of the uppermost end among the heat transfer tubes installed in the heat source side heat exchanger 11 is the linear 1st heat transfer tube 21s. This is to promote the cooling of the second refrigerant flowing through the heat transfer pipe 31a for air conditioning by the drain water falling down by gravity through the plate-like fins 11f in the hot water supply and cooling operation mode.

<Effect 3>
According to the hot water supply air conditioner according to the present embodiment, the heat transfer pipe 21a for hot water supply and the heat transfer pipe 31a for air conditioning are respectively dispersed and installed in the plate-like fins 11f. Therefore, the whole plate-like fin 11f can be made into the heat transfer area in the case of heat exchange, and heat transfer performance can be improved.
In addition, in the hot water supply operation, the cooling operation, and the heating operation, by improving the heat transfer performance as described above, it is possible to reduce the number of rotations of the compressor and the fan, and to improve the efficiency of the entire system. it can. Moreover, the effect of suppressing frost formation is also enhanced by the improvement of the heat transfer performance, and the comfort and the energy saving performance can be improved.

Moreover, since the distance between the linear first heat transfer pipe 21s and the linear second heat transfer pipe 31s is short and alternately arranged up and down, compared to the case where the respective heat transfer pipes are arranged in one place. Thus, the efficiency of heat exchange via the plate-like fins 11f is increased. Therefore, when performing the hot water supply and cooling operation, it is possible to effectively use the heat of the refrigerant circuits of each other without newly providing equipment for exhaust heat recovery, and the efficiency of the entire system is further improved. Can.

Fourth Embodiment
<Configuration of air conditioning and hot water supply device>
FIG. 6 is a block diagram of the hot water supply air conditioner according to the fourth embodiment. The hot water supply air-conditioning system S2 according to the fourth embodiment has a hot water supply heat source side heat exchanger (in the heat source side heat exchanger 11, the heat transfer pipe 21a for hot water supply is installed, compared to the hot water supply air conditioner S1 according to the first embodiment. Connected in parallel with the air conditioning heat source side heat exchanger (the part of the heat source side heat exchanger 11 where the air conditioning heat transfer pipe 31a is installed), and the exhaust heat from the second refrigerant is The difference is that the exhaust heat recovery heat exchanger 70 for recovering the refrigerant is provided. The other points are the same as those of the hot water supply air-conditioning system S1 according to the first embodiment, so the description will be omitted.

As shown in FIG. 6, in the hot water supply refrigerant circuit 20, an exhaust heat recovery heat exchanger 70 that exchanges heat between the first refrigerant and the second refrigerant, and two that flow or block the first refrigerant by opening and closing. The

directional valves

25, 26, 27, 28 are installed.
One end of the primary side heat transfer pipe 70 a of the exhaust heat recovery heat exchanger 70 is connected to the pipe 23 a via the two-way valve 25, and the other end is connected to the pipe 28 a via the two-way valve 26.
Further, one end of the two-way valve 27 is connected to the hot water supply expansion valve 23 through a pipe 23 a, and the other end is connected to the hot water heat transfer pipe 21 a of the heat source side heat exchanger 11. Further, one end of the two-way valve 28 is connected to the hot water supply compressor 21 through a pipe 28 a, and the other end is connected to the hot water heat transfer pipe 21 a of the heat source side heat exchanger 11.

Further, as shown in FIG. 6, in the air conditioning refrigerant circuit 30, two-

way valves

36, 37, 38, 39 are provided which flow or shut off the second refrigerant by opening and closing.
One end of the secondary side heat transfer pipe 70 b of the exhaust heat recovery heat exchanger 70 is connected to the pipe 32 a via the two-way valve 36, and the other end is connected to the pipe 34 a via the two-way valve 37.
Further, one end of the two-way valve 38 is connected to the four-way valve 32 via the pipe 32 a, and the other end is connected to the air conditioning heat transfer pipe 31 a of the heat source side heat exchanger 11. Further, one end of the two-way valve 39 is connected to the air conditioning expansion valve 34 via the pipe 34 a, and the other end is connected to the air conditioning heat transfer pipe 31 a of the heat source side heat exchanger 11.

The hot water supply air-conditioning system S2 according to the present embodiment performs operations corresponding to various operation modes, similarly to the hot water supply air-conditioning apparatus S1 according to the first embodiment.
The exhaust heat recovery heat exchanger 70 is used when performing the hot-water supply cooling operation, and is not used otherwise. That is, when performing the hot water supply operation, the cooling operation, the heating operation, or the heating hot water supply operation, the control device 60 closes the two-

way valves

25, 26, 36, 37 and opens the two-

way valves

27, 28, 38, 39 Do.
The operations in the hot water supply refrigerant circuit 20, the air conditioning refrigerant circuit 30, the hot water supply circuit 40, and the air conditioning heat transfer medium circulation circuit 50 when the exhaust heat recovery heat exchanger 70 is not used are the same as in the first embodiment. The description is omitted because it is similar.

<Mode determination processing in hot water supply and cooling operation>
Next, the processing of the control device 60 when performing the hot water supply and cooling operation will be described. FIG. 7 is a flowchart showing the flow of the mode determination process in the hot water supply and cooling operation.
In step S101, the control device 60 estimates the hot-water heat absorption amount Qec_ex and the air-conditioning exhaust heat amount Qac_ex. Here, the hot water supply heat absorption amount Qec_ex is the heat absorption amount from the heat source required for the hot water supply operation when the hot water supply refrigerant circuit 20 and the air conditioning refrigerant circuit 30 are operated independently. Further, the air conditioning exhaust heat quantity Qac_ex is an exhaust heat quantity to the heat source required for the cooling operation when the hot water supply refrigerant circuit 20 and the air conditioning refrigerant circuit 30 are operated independently.

In step S102, the control device 60 determines whether the hot water supply endothermic heat amount Qec_ex is larger than the air conditioning exhaust heat amount Qac_ex.
When the hot water supply endothermic heat amount Qec_ex is larger than the air conditioning exhaust heat amount Qac_ex (S102 → Yes), the process of the control device 60 proceeds to step S103. When the hot water supply heat absorption amount Qec_ex is equal to or less than the air conditioning exhaust heat amount Qac_ex (S102 → No), the process of the control device 60 proceeds to step S104.

In step S103, the control device 60 determines the operation mode of the hot water supply air conditioning device S2 as the "cooling and hot water supply operation (exhaust heat recovery A) mode". The operation of the hot water supply air conditioning system S2 in the operation mode will be described later with reference to FIG.
In step S104, the control device 60 determines whether the hot water supply heat absorption amount Qec_ex is equal to the air conditioning exhaust heat amount Qac_ex.
When the hot water supply heat absorption amount Qec_ex is equal to the air conditioning exhaust heat amount Qac_ex (S104 → Yes), the process of the control device 60 proceeds to step S105. When the hot water supply endothermic heat amount Qec_ex is not equal to the air conditioning waste heat amount Qac_ex (S104 → No), the process of the control device 60 proceeds to step S106.

In step S105, the control device 60 determines the operation mode of the hot water supply air conditioning device S2 as the "cooling and hot water supply operation (exhaust heat recovery B) mode". The operation of the hot water supply air conditioning system S2 in the operation mode will be described later with reference to FIG.
In step S106, the control device 60 determines the operation mode of the hot water supply air conditioning device S2 as the "cooling and hot water supply operation (exhaust heat recovery C) mode". The operation of the hot water supply air conditioner S2 in the operation mode will be described later with reference to FIG.

<Control in hot water supply and cooling operation>
(Hot water supply cooling operation (exhaust heat recovery A) mode)
FIG. 8 is a configuration diagram showing the flows of the refrigerant, the heat transfer medium, and the liquid to be heated of the hot water supply air conditioning system in the hot water supply cooling operation (exhaust heat recovery A) mode.
Here, exhaust heat recovery A is in the case of “hot water supply heat absorption> air conditioning exhaust heat”, and the exhaust heat of the air conditioning refrigerant circuit 30 is recovered by the hot water supply refrigerant circuit 20 through the exhaust heat recovery heat exchanger 70, The heat deficiency necessary for hot water supply is absorbed from the outdoor air.
The operation of the hot water supply circuit 40 in the operation mode is the same as that of the hot water supply operation mode of the first embodiment, and the operation of the heat transfer medium circulation circuit 50 for air conditioning is the same as the operation in the cooling operation mode of the first embodiment. Therefore, the description is omitted.

The hot water supply refrigerant circuit 20 will be described. The controller 60 opens the two-

way valves

25, 26, 27, 28 so that the first refrigerant flows through the heat source side heat exchanger 11 and the exhaust heat recovery heat exchanger 70. Further, the control device 60 controls the opening degree (throttle) of the hot water supply expansion valve 23 and controls the rotational speeds of the hot water supply compressor 21 and the hot water supply fan 24.

The high-temperature and high-pressure first refrigerant discharged from the hot water supply compressor 21 flows into the primary-side heat transfer pipe 22 a of the hot water use side heat exchanger 22 functioning as a condenser. The first refrigerant flowing through the primary side heat transfer pipe 22a of the hot water use side heat exchanger 22 dissipates heat by heat exchange with the liquid to be heated flowing through the secondary side heat transfer pipe 22b of the hot water use side heat exchanger 22. (Exhaust heat) to become a medium temperature high pressure first refrigerant. The medium-temperature and high-pressure first refrigerant flowing out of the primary-side heat transfer pipe 22a of the hot-water supply utilization side heat exchanger 22 is decompressed by the hot-water supply expansion valve 23, and becomes a low-temperature and low-pressure first refrigerant.

Then, the low temperature and low pressure first refrigerant flows into the hot water heat transfer pipe 21 a of the heat source side heat exchanger 11 via the two-way valve 27, and the exhaust heat recovery heat exchanger 70 via the two-way valve 25. It divides into the flow which flows in into the primary side electric heat pipe.
The first refrigerant flowing through the heat transfer pipe 21a of the heat source side heat exchanger 11 exchanges heat with the air (outdoor air) sent by the hot water supply fan 24, thereby drawing heat from the air (heat absorption (heat absorption) To do). Then, the first refrigerant flowing out of the heat transfer pipe 21 a flows into the hot water supply compressor 21 through the two-way valve 28.

On the other hand, the first refrigerant flowing through the primary heat transfer pipe 70a of the exhaust heat recovery heat exchanger 70 exchanges heat with the high temperature second refrigerant flowing through the secondary heat transfer pipe 70b, thereby generating a second refrigerant. Pump up heat from (endothermic). Then, the first refrigerant flowing out from the primary heat transfer pipe 70 a of the exhaust heat recovery heat exchanger 70 flows into the hot water supply compressor 21 through the two-way valve 26.
Thus, the first refrigerant circulates through the hot water supply refrigerant circuit 20.

The air conditioning refrigerant circuit 30 will be described. The control device 60 opens the two-

way valves

36 and 37 so that the first refrigerant does not flow through the heat exchanger 70 for exhaust heat recovery and the heat source side heat exchanger 11, The

valves

38, 39 are closed. Further, the control device 60 controls the opening degree (throttle) of the air conditioning expansion valve 34, stops the air conditioning fan 35, and controls the rotational speed of the air conditioning compressor 31.

The high-temperature and high-pressure second refrigerant discharged from the air conditioning compressor 31 flows into the secondary heat transfer pipe 70b of the exhaust heat recovery heat exchanger 70 via the four-way valve 32 and the two-way valve 36. The second refrigerant flowing through the secondary side heat transfer pipe 70b of the exhaust heat recovery heat exchanger 70 dissipates heat (exhaust heat) by heat exchange with the low temperature first refrigerant flowing through the primary side heat transfer pipe 70a. It becomes a medium temperature high pressure second refrigerant.

The medium-temperature high-pressure second refrigerant flowing out of the secondary heat transfer pipe 70 b of the exhaust heat recovery heat exchanger 70 flows into the air conditioning expansion valve 34 via the two-way valve 37. Then, the medium-temperature high-pressure second refrigerant is decompressed by the air conditioning expansion valve 34, becomes a low-temperature low-pressure first refrigerant, and flows into the primary heat transfer pipe 33 a of the air conditioning utilization side heat exchanger 33.
The second refrigerant flowing through the primary side heat transfer pipe 33 a of the air conditioning utilization side heat exchanger 33 absorbs heat by exchanging heat with the heat transfer medium flowing through the secondary side heat transfer pipe 33 b, and via the four-way valve 32 It flows into the air conditioning compressor 31.
Thus, the second refrigerant circulates through the air conditioning refrigerant circuit 30.

(Hot-water supply and cooling operation (exhaust heat recovery B) mode)
FIG. 9 is a configuration diagram showing the flows of the refrigerant, the heat transfer medium, and the liquid to be heated of the hot water supply air conditioning system in the hot water supply cooling operation (exhaust heat recovery B) mode.
Here, the exhaust heat recovery B is the case of “hot water supply heat absorption = air conditioning exhaust heat”, and the exhaust heat of the air conditioning refrigerant circuit 30 is recovered by the hot water supply refrigerant circuit 20 via the exhaust heat recovery heat exchanger 70. ing.
The operation of the hot water supply circuit 40 in the operation mode is the same as that of the hot water supply operation mode of the first embodiment, and the operation of the heat transfer medium circulation circuit 50 for air conditioning is the same as the operation in the cooling operation mode of the first embodiment. Description is omitted because there is.
Moreover, since the operation of the air conditioning refrigerant circuit 40 in the operation mode is the same as the operation of the cooling and hot water supply operation (exhaust heat recovery A) mode (see FIG. 8), the description will be omitted.

The hot water supply refrigerant circuit 20 will be described. The difference between the hot water supply refrigerant circuit 20 in the cooling hot water supply operation (exhaust heat recovery A) mode (see FIG. 8) and the hot water supply refrigerant circuit 20 in the cooling hot water supply operation (exhaust heat recovery B) mode (see FIG. 9) While the control device 60 opens the two-

way valves

27 and 28 in the cooling and hot-water supply operation (exhaust heat recovery A) mode, the two-

way valves

27 and 28 are closed in the cooling and hot-water supply operation (exhaust heat recovery B) mode. is there.
The other control is the same as the hot water supply refrigerant circuit 20 in the cooling and hot water supply operation (exhaust heat recovery A) mode, and therefore the description thereof is omitted.

Then, the low temperature and low pressure first refrigerant flows into the primary heat transfer pipe 70 a of the exhaust heat recovery heat exchanger 70 via the two-way valve 25. The first refrigerant flowing through the primary heat transfer tube 70a of the exhaust heat recovery heat exchanger 70 exchanges heat with the high temperature second refrigerant flowing through the secondary heat transfer tube 70b, thereby generating heat from the second refrigerant Pump up (heat absorption). The first refrigerant flowing out of the primary heat transfer tube 70 a of the exhaust heat recovery heat exchanger 70 flows into the hot water supply compressor 21 through the two-way valve 26.
Thus, the first refrigerant circulates through the hot water supply refrigerant circuit 20.

(Hot water supply and cooling operation (exhaust heat recovery C) mode)
FIG. 10 is a configuration diagram showing the flows of the refrigerant, the heat transfer medium, and the liquid to be heated of the hot water supply air conditioning system in the hot water supply cooling operation (exhaust heat recovery C) mode.
Here, the exhaust heat recovery C is in the case of "hot water supply heat absorption <air conditioning exhaust heat", and the exhaust heat of the air conditioning refrigerant circuit 10 is recovered by the hot water supply refrigerant circuit 30 via the exhaust heat recovery heat exchanger 70, Excess air conditioning exhaust heat is exhausted to outdoor air.
The operation of the hot water supply circuit 40 in the operation mode is the same as that of the hot water supply operation mode of the first embodiment, and the operation of the heat transfer medium circulation circuit 50 for air conditioning is the same as the operation in the cooling operation mode of the first embodiment. Description is omitted because there is.
Moreover, since the operation of the hot water supply refrigerant circuit 20 in the operation mode is the same as the operation of the cooling / hot water supply operation (exhaust heat recovery B) mode (see FIG. 10), the description will be omitted.

The air conditioning refrigerant circuit 30 will be described. The difference between the air conditioning refrigerant circuit 30 in the cooling hot water supply operation (exhaust heat recovery A) mode (see FIG. 8) and the air conditioning refrigerant circuit 30 in the cooling hot water supply operation (exhaust heat recovery C) mode (see FIG. 10) While the controller 60 closes the two-

way valves

38 and 39 in the cooling / hot-water supply operation (exhaust heat recovery A) mode, the two-

way valves

38 and 39 are opened in the cooling / hot-water supply operation (exhaust heat recovery C) mode. is there.
The other control is the same as that of the air conditioning refrigerant circuit 30 in the cooling / hot water supply operation (exhaust heat recovery A) mode, and therefore the description thereof is omitted.

The high temperature and high pressure second refrigerant discharged from the air conditioning compressor 31 flows into the air conditioning heat transfer pipe 31 a of the heat source side heat exchanger 11 through the two-way valve 38, and is discharged through the two-way valve 36. It divides into the flow which flows in into the secondary side heat exchanger tube 70b of the heat exchanger 70 for heat recovery.
The second refrigerant flowing through the air conditioning heat transfer pipe 31a of the heat source side heat exchanger 11 exchanges heat with the air (outdoor air) sent by the air conditioning fan 35 to release heat (exhaust heat) to the air. It becomes a medium temperature high pressure second refrigerant. Then, the second refrigerant flowing out of the heat transfer pipe 31 a for air conditioning of the heat source side heat exchanger 11 flows into the expansion valve 34 for air conditioning via the two-way valve 39.

On the other hand, the second refrigerant flowing through the secondary side heat transfer pipe 70b of the exhaust heat recovery heat exchanger 70 exchanges heat with the low temperature first refrigerant flowing through the primary side heat transfer pipe 70a. Heat dissipation (exhaust heat). Then, the second refrigerant that has flowed out from the secondary side heat transfer pipe 70 b of the exhaust heat recovery heat exchanger 70 flows into the air conditioning expansion valve 34 via the two-way valve 37.
Further, the second refrigerant is decompressed by the air conditioning expansion valve 34, and becomes a low temperature and low pressure second refrigerant, and flows into the primary heat transfer pipe 33a of the air conditioning utilization side heat exchanger 33.

The second refrigerant flowing through the primary side heat transfer pipe 33a of the air conditioning utilization side heat exchanger 33 absorbs heat by exchanging heat with the air conditioning heat transfer medium flowing through the secondary side heat transfer pipe 33b, and the four-way valve 32 The air flows into the air conditioning compressor 31 via the air conditioner.
Thus, the second refrigerant circulates through the air conditioning refrigerant circuit 30.

<Effect 4>
The hot water supply air conditioning apparatus S2 according to the present embodiment circulates the heat exhaust heat of the second refrigerant circulating in the air conditioning refrigerant circuit 30 in the exhaust heat recovery heat exchanger 70 during the hot water supply cooling operation, and circulates the hot water supply refrigerant circuit 20 By supplying one coolant, it is possible to effectively use the exhaust heat that has been released to the outside air so far, and it is possible to improve the efficiency of the entire system.
In addition, even when the heat absorption amount of the first refrigerant in the hot water supply refrigerant circuit 20 and the exhaust heat amount of the second refrigerant in the air conditioning refrigerant circuit 30 do not match, by appropriately opening and closing each two-way valve The heat absorption or exhaust heat can be compensated by heat exchange with the outdoor air in the heat source side heat exchanger 11.

Further, the hot water supply air conditioner S2 according to the present embodiment uses the heat source side heat exchanger 11 only for heat exchange between the first refrigerant circulating in the hot water supply refrigerant circuit 20 and the outdoor air when executing the hot water supply cooling operation mode. Or, it is used only for heat exchange between the second refrigerant circulating in the air conditioning refrigerant circuit 30 and the outdoor air (see FIG. 10).
That is, when heat exchange between the first refrigerant and the outdoor air or heat exchange between the second refrigerant and the outdoor air is performed, the entire plate-like fins 11f of the heat source side heat exchanger 11 are used for heat exchange, Heat transfer performance can be improved. As a result, the number of rotations of the compressor or fan can be reduced, and the efficiency of the entire system can be improved.

Fifth Embodiment
FIG. 11 is a block diagram of the hot water supply air conditioner according to the fifth embodiment.
The hot water supply air-conditioning apparatus S3 according to the fifth embodiment differs from the hot water supply air-conditioning apparatus S1 according to the first embodiment in that a solar heat collecting unit 300 is included. The other points are the same as those of the hot water supply air-conditioning system S1 according to the first embodiment, so the description will be omitted.

As shown in FIG. 11, the solar heat collecting unit 300 includes a solar heat collecting circuit 80, a heat storage tank 82, and three-

way valves

85 and 86.
The solar heat collecting circuit 80 is configured by annularly connecting a solar heat collector 84, a circulation pump 81, and an in-tank heat exchanger 83 with a pipe.

The solar heat collector 84 is for collecting solar heat to heat the third refrigerant, and may be a flat plate collector, a vacuum tube collector, or the like.
The circulation pump 81 pumps the third refrigerant in the solar heat collecting circuit 80. By driving the circulation pump 81, the third refrigerant heated by the solar heat collector 80 can be pressure-fed to the in-tank heat exchanger 83.
The in-tank heat exchanger 83 performs heat exchange between the third refrigerant and the liquid to be heated stored in the heat storage tank 82. The in-tank heat exchanger 83 is installed in the heat storage tank 83, and the pipes connected to both ends thereof respectively penetrate the heat storage tank 82, one is connected to the discharge port of the circulation pump 81, and the other is the solar heat collecting It is connected to the vessel 84.
As the third refrigerant, for example, brine (antifreeze) can be used.

The liquid to be heated is stored inside the heat storage tank 82, and the heat exchange between the third refrigerant flowing through the in-tank heat exchanger 83 and the liquid to be heated is possible in the heat storage tank 82.
The three-

way valves

85 and 86 are three-way valves configured to be capable of adjusting the flow rate ratio of the heated liquid flowing therethrough. Each port of the three-way valve 85 is connected to the three-way valve 44, the heat storage tank 82, and the water heater 102, respectively. Each port of the three-way valve 86 is connected to the three-way valve 46, the heat storage tank 82, and the water supply fitting 101, respectively.

In the solar heat collecting circuit 80, the low temperature third refrigerant pressure-fed from the in-tank heat exchanger 83 to the solar heat collector 84 by the circulation pump 81 is heated by the solar heat to rise in temperature, and becomes an intermediate temperature third refrigerant. . Furthermore, the medium-temperature third refrigerant is sent to the in-tank heat exchanger 83 by the circulation pump 81, and is cooled by heat exchange with the liquid to be heated in the heat storage tank 82 to become a low-temperature third refrigerant.
Further, the liquid to be heated in the heat storage tank 82 is heated by heat exchange with the intermediate temperature third refrigerant flowing through the in-tank heat exchanger 83, and becomes an intermediate temperature heated liquid.

When there is a request for hot water from the user, the medium-temperature liquid to be heated in the heat storage tank 82 is adjusted to a desired temperature similarly to the liquid to be heated in the hot water storage tank 42, and then the hot water supply 102 is used. Supplied. With regard to whether to use the liquid to be heated in the hot water storage tank 42 or the liquid to be heated in the thermal storage tank 82 in response to the hot water request from the user, the liquid to be heated in the hot water storage tank 42 at that time is used. It is determined by the temperature, the temperature of the liquid to be heated in the heat storage tank 72, the temperature required by the user, and the like.
The solar heat collecting unit 300 can be used throughout the year because it can be used together with any of the hot water supply operation, the cooling operation, the heating operation, the hot water supply cooling operation, and the hot water supply heating operation.

<Effect 5>
According to the hot water supply air-conditioning apparatus S3 according to the present embodiment, the thermal energy obtained by the solar heat collector 84 can be used as a heat source for hot water supply, so that the efficiency of the entire system can be significantly improved. By the way, when it is estimated by calculation about the case of using the solar heat collector 84 of about 6 m ² , it is found that the power consumption can be reduced by about 40% in a year.

Further, according to the hot water supply air-conditioning system S3 according to the present embodiment, since the liquid to be heated can be heated by the solar heat, when performing the cooling and hot water supply operation, the heat transfer of the heat source side heat exchanger 11 is performed. The frequency of using the heat pipe 21a is reduced. That is, when heat exchange is performed between the second refrigerant flowing through the air conditioning heat transfer pipe 31a and the outdoor air, the frequency of using the entire plate-like fins 11f increases. As a result, the rotational speed of the compressor or fan can be reduced, and the efficiency of the entire system can be further improved.

«Modification»
As mentioned above, although each embodiment demonstrated the hot-water supply air conditioning apparatus which concerns on this invention, the embodiment of this invention is not limited to these description, A various change etc. can be performed.
For example, the configuration of the heat source side heat exchanger 11 (see FIGS. 2 to 5) shown in the first to third embodiments corresponds to the hot water supply air conditioner S2 according to the fourth embodiment and the hot water supply according to the fifth embodiment. It is applicable also to air conditioner S3.

Further, although the heat source side heat exchanger 11 has been described using FIGS. 2 to 5, the configuration of the heat source side heat exchanger 11 is not limited to this. For example, the heat transfer pipe 21a for hot water supply and the heat transfer pipe 31a for air conditioning may be installed on the plate-like fin 11f so as to overlap in parallel with the air flow direction. Even in this case, the heat source side heat exchanger for hot water supply and the heat source side heat exchanger for air conditioning are integrated through the plate-like fins 11 f, thereby improving the efficiency of the entire system with a simple configuration. Can.

In the above embodiment, the heat transfer medium is heated (or cooled) by the air conditioning utilization side heat exchanger 33, supplied to the indoor unit 200, and heated (or cooled) by the indoor heat exchanger 52. Although it has been described that the room is heated (or cooled) by heat exchange with the room air and the room air, the invention is not limited to this. That is, the heat transfer medium circulation circuit 50 for air conditioning is omitted, the air conditioning utilization side heat exchanger 33 is installed in the indoor unit 2, and the second air flowing through the air conditioning utilization side heat exchanger 33 flows between the indoor air and the second refrigerant. It is good also as composition which heats (or air conditioning) by exchanging heat with.

In each of the embodiments, the heat transfer pipe 21a for hot water supply and the heat transfer pipe 31a for air conditioning are respectively penetrated through the plurality of fins 11f stacked substantially in parallel at predetermined intervals. Not exclusively. That is, the hot water supply heat source side heat exchanger and the air conditioning heat source side heat exchanger can respectively exchange heat with the outdoor air, and the hot water supply heat source side heat exchanger and the air conditioning heat source side heat exchanger are in thermal contact. Just do it.
For example, in addition to the case where the plurality of fins provided in the hot water supply heat source side heat exchanger and the plurality of fins provided in the air conditioning heat source side heat exchanger are integrated, the configuration may be in physical contact. Even in this case, the first refrigerant flowing through the heat transfer heat transfer pipe of the hot water supply heat source side heat exchanger and the second refrigerant flowing through the air conditioning heat transfer pipe of the air conditioning heat source side heat exchanger mutually exchange heat with each other. it can.

S1, S2, S3 Air conditioning and hot water supply equipment 11 Heat source side heat exchanger (hot water supply heat source side heat exchanger, air conditioning heat source side heat exchanger)
Reference Signs List 20 refrigerant circuit for hot water supply 21a heat transfer pipe for hot water supply 21s linear first heat transfer pipe 21c first heat transfer pipe for connection 21 hot water supply compressor 22 hot water use side heat exchanger 23 expansion valve for hot water supply (pressure reduction device for hot water supply)
25, 26, 27, 28 Two-way valve (opening and closing means for hot water supply)
30 Air-Conditioning Refrigerant Circuit 31a Air-Conditioning Heat Transfer Tube 31s Straight Second Heat-Transfer Tube 31c Connection Second Heat-Transfer Tube 31 Air-Conditioning Compressor 32 Four-way Valve (Flow Path Switching Means)
33 Air conditioning user side heat exchanger 34 Air conditioning expansion valve (air conditioning pressure reducing device)
36, 37, 38, 39 Two-way valve (switching means for air conditioning)

Claims

A hot-water supply refrigerant circuit including a hot-water supply compressor, a hot-water use side heat exchanger, a hot-water supply pressure reduction device, and a hot-water heat source side heat exchanger connected annularly, and having a first refrigerant circulating therein.
The air conditioning compressor, the flow path switching means, the air conditioning utilization side heat exchanger, the air conditioning pressure reducing device, and the air conditioning heat source side heat exchanger are annularly connected, and for air conditioning in which the second refrigerant circulates A hot water supply air conditioner comprising a refrigerant circuit, comprising:
The hot water supply heat source side heat exchanger and the air conditioning heat source side heat exchanger can respectively exchange heat with outdoor air,
A hot water supply air conditioning system characterized in that the hot water supply heat source side heat exchanger and the air conditioning heat source side heat exchanger are in thermal contact with each other.
The hot water supply heat source side heat exchanger and the air conditioning heat source side heat exchanger are each provided with a plurality of fins for exchanging heat with outdoor air, and the thermal contact is a plurality of fins of the hot water supply source side heat exchanger, The hot water supply air conditioning system according to claim 1, characterized in that the plurality of fins of the air conditioning heat source side heat exchanger are integrated or in physical contact with each other.
The heat transfer tubes for hot water supply of the hot water supply heat source side heat exchanger and the heat transfer tubes for air conditioning of the air conditioning heat source side heat exchanger respectively penetrate a plurality of fins stacked substantially in parallel at predetermined intervals. The hot water supply air conditioning system according to claim 2, wherein the hot water supply heat source side heat exchanger and the air conditioning heat source side heat exchanger are in thermal contact with each other.
The heat transfer pipe has a plurality of linear first heat transfer pipes penetrating the fins in a direction substantially perpendicular to the heat transfer surface of the fins, and a plurality of connection firsts connecting the linear first heat transfer pipes. A heat transfer tube, and
The air conditioning heat transfer pipe is configured by connecting a plurality of linear second heat transfer pipes penetrating the fin in a direction substantially perpendicular to the heat transfer surface of the fin and a plurality of second connecting connection connecting the linear second heat transfer pipe. A heat transfer tube, and
The linear first heat transfer pipe and the linear second heat transfer pipe are installed substantially horizontally.
The hot water supply air conditioner according to claim 3, wherein at least one of the plurality of linear first heat transfer tubes is installed above the plurality of linear second heat transfer tubes. .
The hot water supply air-conditioning system according to claim 4, wherein the plurality of linear first heat transfer tubes are installed above the plurality of linear second heat transfer tubes.
Among the plurality of linear first heat transfer tubes, a portion of the linear first heat transfer tubes is installed above the plurality of linear second heat transfer tubes, and the remaining linear first heat transfer tubes are The hot water supply air conditioning system according to claim 4, wherein the hot water supply air conditioning system according to claim 4, wherein the hot water supply air conditioning system is installed below the plurality of linear second heat transfer pipes.
The number of the partial straight first heat transfer tubes disposed above the plurality of straight second heat transfer tubes is the remaining straight line disposed below the plurality of straight second heat transfer tubes. The hot water supply air conditioner according to claim 6, characterized in that the number of the first heat transfer tubes is greater than the number of the first heat transfer tubes.
The hot water supply air-conditioning system according to claim 4, wherein the linear first heat transfer pipe and the linear second heat transfer pipe are installed alternately in the vertical direction.
It further comprises an exhaust heat recovery heat exchanger connected in parallel with the hot water supply heat source side heat exchanger and the air conditioning heat source side heat exchanger, for recovering the exhaust heat from the second refrigerant into the first refrigerant,
In the hot water supply refrigerant circuit, a hot water supply opening / closing means is provided for causing the first refrigerant to flow through the hot water supply heat source side heat exchanger and / or the exhaust heat recovery heat exchanger.
The air conditioning refrigerant circuit is provided with an air conditioning opening / closing means for causing the second refrigerant to flow through the air conditioning heat source side heat exchanger and / or the exhaust heat recovery heat exchanger. The hot water supply air-conditioning apparatus according to any one of claims 1 to 8.
The system further comprises a solar heat collecting circuit through which the third refrigerant circulates,
The solar heat collecting circuit is
The heat exchange between the liquid to be heated and the third refrigerant stored in the heat storage tank is installed in the heat storage tank connected to the hot water supply circuit capable of exchanging heat with the first refrigerant flowing through the refrigerant circuit for hot water supply An in-tank heat exchanger,
Solar heat collectors, which collect solar heat,
9. A circulation pump for pressure-feeding the third refrigerant heated by the solar heat collector to the in-tank heat exchanger, which is annularly connected to each other. The hot water supply air conditioner according to any one of the preceding claims.
The system further comprises a solar heat collecting circuit through which the third refrigerant circulates,
The solar heat collecting circuit is
The heat exchange between the liquid to be heated and the third refrigerant stored in the heat storage tank is installed in the heat storage tank connected to the hot water supply circuit capable of exchanging heat with the first refrigerant flowing through the refrigerant circuit for hot water supply An in-tank heat exchanger,
Solar heat collectors, which collect solar heat,
The hot water supply system according to claim 9, characterized in that a circulating pump for pressure-feeding the third refrigerant heated by the solar heat collector to the in-tank heat exchanger is annularly connected. Air conditioner.