JPS61149771A - Composite type heat pump device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a composite heat pump device, and more specifically, it is capable of generating solar heat, geothermal heat, or waste heat by using multiple heat exchangers as condensers or evaporators depending on the purpose. The present invention relates to a composite heat pump device that can effectively utilize various heat sources such as heat.

<Prior art> Conventionally, a heat pump device in which a plurality of heat radiation sources are provided for one heat absorption source is known. For example, for one outdoor heat exchange unit, several indoor heat exchange units are provided. It is well known that a heat exchange unit can be connected to heat or cool a desired room.

By the way, this type of heat exchanger is economical in terms of production cost because only one outdoor heat exchanger is required, but the air is used as the heat absorption source for the outdoor heat exchanger. In this case, especially during heating, it is known that the heating capacity is greatly affected depending on the state of the atmospheric temperature.

On the other hand, in recent years, air conditioning, heating, and hot water systems have become popular as part of measures to improve livability, and efforts have been made to save labor and energy in these types of systems. Heat utilization equipment is being researched and developed as a total system.

<Problems to be solved by the invention> However, even in these systems, it is easy to use an external heat absorption source as is for heating and hot water supply using a hot water heater, etc., but for cooling, a refrigeration device must be used. Must be.

In other words, a refrigeration device is installed alongside the heat absorption device.

In this case, when using the raw heat source, it is necessary to install different types of systems together, and compared to a system with only one type, it is disadvantageous in terms of cost and equipment due to the large number of systems.

The present invention has been made in view of such conventional problems, and by connecting all the user side heat sources and raw heat sources with a heat pump circuit and configuring the heat utilization circuit as a single system, the above-mentioned problem can be solved. The purpose is to solve problems.

(Means for Solving the Problems) Therefore, the present invention provides a refrigerant passage that branches into a plurality of parts in the middle of the refrigerant passage on the discharge side of the compressor, and then finally gathers again and is connected to the refrigerant passage on the suction side of the compressor. A plurality of refrigerant branch paths are provided, and each of the refrigerant branch paths is provided with a heat exchanger and on-off valves located on both sides of the heat exchanger that are selectively controlled to open and close. , branching from between the heat exchanger functioning as a condenser of the refrigerant branch and the opening/closing valve, and starting from the downstream side of the heat exchanger and upstream of the heat exchanger functioning as the evaporator of another refrigerant branch. The configuration includes a secondary refrigerant branch path leading to the refrigerant via an expansion means.

<Operation> With this configuration, the refrigerant discharged by the compressor passes from the discharge-side refrigerant passage through the open on-off valve of the refrigerant branch passage, reaches the heat exchanger that functions as a condenser, and further passes through the refrigerant secondary branch passage. via the expansion means of the refrigerant to the heat exchanger of the other refrigerant branch, which functions as an evaporator.

The refrigerant then reaches the suction side refrigerant passage from the refrigerant branch and is returned to the compressor.

A plurality of patterns of such refrigerant paths are obtained by controlling the on-off valve.

<Example> The embodiment shown in FIGS. 1 to 3 will be explained below.

The discharge side refrigerant passage 2 of the compressor 1 for refrigerant compression is connected to a branch passage 3
It branches into a plurality of refrigerant branch paths 4, 5,
6.7, the refrigerant refrigerant passages are gathered again through a branch passage 8 and connected to a suction side refrigerant passage 9.

This suction side refrigerant passage 9 is connected to the compressor 1 via an accumulator 10.

Each of the plurality of refrigerant branches 4.5.6.7 includes heat exchangers A, B, C, and D;

On-off valves located on both sides with D in between and selectively controlled to open and close al*13+ bl + b3+
CI*C3+d,, d, and heat exchangers A, B, and each refrigerant branch path 4.5.6.7 are arranged.
C, D and on-off valves al + a3 + bl + b
2. Passage 11 from between CI r C3゜d,,d,
．． 12, 13, 14, 15° 16, and 17.18 are branched, respectively.

Here, the heat exchanger A is located at the lower part of the hot water storage tank 31, and the heat exchanger B is located at the lower part of the hot water storage tank 31.
is inside the bathtub 32, and the heat exchanger C is inside the indoor heat exchange unit 3.
3, the heat exchangers are disposed in the outdoor heat exchange unit 34, respectively.

The passages 11, 13, 15, and 17 that branch from the same side of each heat exchanger A, B, C, and D are gathered at one place by the branch passage 19, and similarly branch from the same other side. The passages 12, 14, 16, 18 are also gathered in one place by a branch passage 20, and these two branch passages 19, 20 are connected by a communication passage 21.

Further, on-off valves a2. b2. c2. A check valve 22.23.24.25 and an expansion valve 26.27.28.29 as an expansion means are interposed between the passage 12.14.16.18 and the branch passage 20, respectively. Heat exchanger A
,B.

They are inserted in this order starting from C and D.

Next, the effect of this configuration will be explained.

First, for example, when cooling the room and heating the hot water tank 31 and bathtub 32 at the same time in the summer, the on-off valve aInbl
+ C2+ C3+ dZ + d3 is opened and on-off valve at + a3 + bZ + b
3 + CI + dl is closed.

The refrigerant discharged by the compressor 1 passes from the discharge-side refrigerant passage 2 via the branch passage 3 and through the open/close valve al+b+ of the refrigerant branch passage 4.5, and is then transferred to the heat exchanger A.

Leading to B.

Then check valve 22.23 in passage 12.14, expansion valve 2
6°27, the on-off valve d in the open state of the passage 17.15 from the branch passage 20 to the communication passage 21 and further via the branch passage 19! +
It passes through C2, a heat exchanger, and reaches C.

At this time, passage 12. Communication path 21. Aisle 17 and Aisle 1
4. Communication path 21. Each passage 15 constitutes a secondary refrigerant branch.

Then, the refrigerant is collected from the refrigerant branch passage 7.6 through the branch passage 8, reaches the suction side refrigerant passage 9, and is returned to the compressor 1 via the accumulator 10.

At this time, each heat exchanger A in the hot water storage tank 31 and the bathtub 32.

B functions as a condenser, and the heat exchangers C1D in the indoor heat exchange unit 33 and the outdoor heat exchange unit 34 function as evaporators.

As a result, each heat exchanger A and B heats the hot water tank 31 and the bathtub 32, and at the same time, heat exchanger C cools the room, and at the same time, heat exchanger C removes heat from the room. Perform absorption. At the same time, heat is absorbed from the atmosphere using a heat exchanger.

For example, when heating the room and heating the hot water tank 31 and bathtub 32 at the same time in winter, the on-off valves al+bl,
c,, d2+ d3 is opened, on-off valve a2゜a= l bt + b3, C1+ cm l
Make dl a closed state B.

The refrigerant discharged by the compressor 1 passes from the discharge side refrigerant passage 2 through the branch passage 3, passes through the open on-off valves a++b++c+ of the refrigerant branch passages 4 and 5°6, and reaches the heat exchangers A, B, and C. .

Then check valve 22.23.2 in passage 12.14.16
4. Expansion valve 26, 27, 28, branch path 20 to communication path 2
1, further passes through the open/close valve d2 of the passage 17 via the branch passage 19, and reaches the heat exchanger.

At this time, passage 12. Communication passage 219 passage 17, passage 14° communication passage 219 passage 17 and passage 16. The communication passage 211 and the passage 17 each constitute a secondary refrigerant branch passage.

Then, the refrigerant is collected from the refrigerant branch path 7 through the branch path 8, reaches the suction side refrigerant path 9, and is returned to the compressor 1 via the accumulator IO.

At this time, the heat exchangers A, B, and C in the hot water storage tank 31, the bathtub 32, and the indoor heat exchange unit 33 function as condensers, and the heat exchangers in the outdoor heat exchange unit 34 function as condensers. will function as an evaporator.

As a result, the hot water storage tank 31° bathtub 3 is heated by heat exchangers A and B.
In addition, the heat exchanger C heats the room, and the heat exchanger C absorbs heat from the atmosphere.

However, this is effective if heat absorption from the atmosphere is possible.

For example, in winter, when heating the room and heating the bathtub 32 simultaneously using the hot water in the hot water storage tank 3I as a heat source, the on-off valves at + a,, l b, I CI are opened, and the on-off valves aIt are opened. bt, b, , C2+ C3
+ 'l+dt, d, is closed.

The refrigerant discharged by the compressor 1 passes from the discharge side refrigerant passage 2 via the branch passage 3, and passes through the open/close valves bI+cl of the refrigerant branch passages 5 and 6, which are in the open state, and is then transferred to the heat exchanger B.

This leads to C.

Then check valve 23.24 in passage 14.16, expansion valve 2
7°28, from the branch passage 20 to the communication passage 21, further via the branch passage 19, passing through the opening/closing valve a2 of the passage 11, and reaching the heat exchanger A.

At this time, passage 14. Communication path 21. Aisle ti and Aisle 1
6. Communication path 21. Each passage ll constitutes a secondary refrigerant branch passage.

Then, the refrigerant is collected from the refrigerant branch path 4 through the branch path 8, reaches the suction side refrigerant path 9, and is returned to the compressor 1 via the accumulator IO.

At this time, each heat exchanger B, C in the bathtub 32 and indoor heat exchange unit 33 functions as a condenser, and the hot water storage tank 31
Heat exchanger A inside will function as an evaporator.

As a result, the heat exchanger B heats the bathtub 32, and the heat exchanger C heats the room.

In addition, for example, when heating the hot water storage tank 31 and heating the room at the same time using the waste heat of the hot water after bathing in the bathtub 32 as a heat source in winter, the on-off valves al + bt + bs I
Open C1 and open/close valve aZ r a3 + b
I + cz Tcm l dl + dl +
d3 is closed.

The refrigerant discharged by the compressor 1 passes from the discharge-side refrigerant passage 2 via the branch passage 3 and the open/close valves aI+CI of the refrigerant branch passages 4 and 6, which are in the open state, and is then transferred to the heat exchanger A.

This leads to C.

Thereafter, the check valves 2, 24 of the passages 12.16 and the expansion valves 2
6°28, from the branch passage 20 to the communication passage 21, further via the branch passage 19, passing through the opening/closing valve b2 of the passage 13, and reaching the heat exchanger B.

At this time, passage 12. Communication path 219 path 13 and path 1
6. Communication path 21. Each passage 13 constitutes a secondary refrigerant branch.

Then, the refrigerant is collected from the refrigerant branch passage 5 through the branch passage 8, reaches the suction side refrigerant passage 9, and is returned to the compressor 1 via the accumulator 1°.

At this time, inside the hot water storage tank 31 and the indoor heat exchange unit 33
Each heat exchanger A, C in the bathtub 32 functions as a condenser.
Heat exchanger B inside will function as an evaporator.

As a result, the heat exchanger A heats the hot water tank 31, and the heat exchanger C heats the room.

A second embodiment is shown in FIG. 3, in which a refrigerant passage 2 on the discharge side of a compressor 1 for compressing refrigerant is branched into a plurality of passages 41, 42, 43 along the way by a branch passage 3. , 44, and then converge again via a branch road 45.

In addition, each passage 12, 14, 16, 18 is also gathered at one place by a branch passage 46, and the branch passage 45.46 is connected to the communication passage 4.
7.

Further, each passage 11, 13, 15, 17 is also gathered at one place by a branch passage 48, and a suction side refrigerant passage 9 connected to the compressor l via an accumulator 10 is connected to this branch passage 48. ing.

The passage structure other than this is the same as that of the i-th embodiment, so the same elements are given the same reference numerals and the explanation will be omitted.

However, the function of each passage varies depending on the refrigerant flow based on the system function.

Here, in the summer, indoor air conditioning, hot water storage tank 31 and bathtub 3 are installed.
Only the case where the second heating is performed at the same time will be explained.

In this case, the function of the passage is as follows.

namely passage 41.44.17 and passage 42.43.1.
5 constitute a refrigerant branch path, and the passage 1
2. Communication path 47 and path 14. The communication passages 47 constitute secondary refrigerant branch passages.

And each on-off valve a+ + ax l 83 +
')l+bt+')3+CI+C1
*Cff+dl+dt* The opening/closing state of cz3 is the same as in the first embodiment described above, but the passage 41,
The refrigerant that has passed through the heat exchangers A and B disposed in the passage 12.14 passes through the check valves 22.23, expansion valves 26.27, and
From the branch passage 46 to the communication passage 47, the water passes through the branch passage 45, passes through the open on-off valves d3+c3 of passages 44 and 43, and reaches the heat exchanger C.

Further, from the passage 17.15, the refrigerant is collected through a branch passage 48, reaches the suction side refrigerant passage 9, and is returned to the compressor 1 via the accumulator it.

In addition, as shown in the first embodiment, for example, when indoor heating and heating of the hot water tank 31 and bathtub 32 are performed simultaneously in the winter, or when heating the indoor room and heating the bathtub 32 using hot water in the hot water storage tank 31 as a heat source in the winter, The same applies to the case where heating is performed at the same time.

In addition, we have increased the number of heat exchangers and used this heat exchanger to generate solar heat,
By absorbing geothermal heat, etc., that is, solar heat, geothermal heat, etc. can be used as a heat absorption source, and as shown in FIG. If another heat exchanger A' is arranged in the upper part of the hot water storage tank 31, stratified storage of hot water and cold water in the hot water storage tank 31 becomes possible.

Further, the arrangement of the expansion valve as the expansion means is not limited to the position in each of the above embodiments, but may be provided in the communication passage, or may be provided in each passage.

In addition, when indoor heat exchangers are installed in the north and south rooms, when the outside air is low in winter and the temperature in the south room is rising due to sunlight, some of that heat is transferred to the north room. It is also possible to radiate heat using a heat exchanger and use it effectively to heat the north room.

As is clear from the above explanation, according to this system, multiple heat exchangers can be used as condensers or evaporators depending on the purpose, for example, waste heat from the bathtub 32, solar heat, geothermal heat, etc. It can be used as a heat absorption source for a heat source or as a heat radiation source for a usage medium such as an air-conditioning device, and as a result, an optimal heating source can be selected as needed and heat can be used effectively.

Therefore, there is no need to install different types of systems when using heating sources, such as the need to use a refrigeration device for air conditioning, and there are fewer systems compared to systems that use different types of systems. This is advantageous in terms of cost and equipment.

Even in its operation, the heat exchanger can be made to function as a condenser or an evaporator simply by controlling each on-off valve, and is excellent in operability.

In each of the above embodiments, the case where there are four heat exchangers has been described, but the present invention is not limited to this, and the refrigerant circuit can be configured with two or more heat exchangers, and the same effect can be achieved.

Furthermore, when two heat exchangers are used, heat pump operation can be performed only by controlling the on-off valve without using a four-way valve.

<Effects of the Invention> As explained above, according to the present invention, a plurality of heat exchangers can be used as condensers or evaporators depending on the purpose,
It can be used as a heat absorption source for various heating sources such as waste heat, solar heat, geothermal heat, etc., or as a heat radiation source for the utilization medium.As a result, the most suitable heating source can be selected as required, and heat can be used effectively.

Therefore, there is no need to install different types of systems when using heating sources, such as the need to use a refrigeration device for air conditioning, and there are fewer systems compared to systems that use different types of systems. This is advantageous in terms of cost and equipment.

Even in this operation, the heat exchanger can be made to function as a condenser or an evaporator simply by controlling each on-off valve, and the effect of excellent operability can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a refrigerant circuit diagram showing a first embodiment of the present invention;
The figure is a schematic diagram of the same embodiment as above, and FIG. 3 is a refrigerant circuit diagram showing a second embodiment of the present invention. 1...Compressor 2...Discharge side refrigerant passage 3.8
゜45, 48... Branch passage 4, 5. 6.7... Refrigerant branch passage 9... Suction side refrigerant passage 11.12.13
．． 14.15.16°17, 18...Aisle 19.
20.46... Branch road 21, 47... Communication path 2
6.27.28.29...Expansion valve 41, 42.43.
44... Passage A, B, C, D... Heat exchanger al + aZ+ a: Il b+, b
! + b! +CI + Cm + C3+ d
l + ax l d3...On-off valve patent applicant
Misawa Homes Co., Ltd. Agent Patent Attorney Fujio Sasashima Figure 1

Claims (1)

[Claims] A plurality of refrigerant branch passages are provided which branch into a plurality of parts in the middle of the discharge side refrigerant passage of the compressor, and then finally come together again and are connected to the suction side refrigerant passage of the compressor, and each of the refrigerant branch passages includes:
A heat exchanger and on-off valves located on both sides of the heat exchanger and selectively controlled to open and close are provided, and a heat exchanger that functions as a condenser of the refrigerant branch path and the on-off valve that is selectively controlled to open and close are provided. A secondary refrigerant branch is provided that branches from between the valve and extends from the downstream side of the heat exchanger to the upstream side of the heat exchanger that functions as an evaporator of another refrigerant branch via an expansion means. A composite heat pump device featuring: