KR101658021B1 - A Heatpump System Using Duality Cold Cycle - Google Patents

A Heatpump System Using Duality Cold Cycle Download PDF

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Publication number
KR101658021B1
KR101658021B1 KR1020150061505A KR20150061505A KR101658021B1 KR 101658021 B1 KR101658021 B1 KR 101658021B1 KR 1020150061505 A KR1020150061505 A KR 1020150061505A KR 20150061505 A KR20150061505 A KR 20150061505A KR 101658021 B1 KR101658021 B1 KR 101658021B1
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KR
South Korea
Prior art keywords
refrigerant
heat exchanger
cycle
heat
expansion valve
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KR1020150061505A
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Korean (ko)
Inventor
강성희
송낙영
정동광
박재수
민경기
Original Assignee
오텍캐리어 주식회사
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Priority to KR1020150061505A priority Critical patent/KR101658021B1/en
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Publication of KR101658021B1 publication Critical patent/KR101658021B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F25B41/04—
    • F25B41/062—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • F25B2341/062—Capillary expansion valves
    • F28D2020/00—

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The present invention relates to a heat pump system using a binary refrigeration cycle, rapidly heating and cooling a space by using a refrigerant. The present invention comprises: a first cycle (10); a second cycle (20); a heat storage tank unit (30); a floor heating unit (40); an indoor unit (50); a refrigerant heat exchanger (24); and a heat storage heat exchanger (25).

Description

[0001] Heat pump system using Duality Cold Cycle [

The present invention relates to a heat pump system using a two-way refrigeration cycle, and more particularly, to a system capable of quickly cooling and heating a room using a refrigerant while allowing hot water and floor heating.

Generally, a device for transferring heat is called a heat pump, and such a heat pump is characterized in that it can simultaneously perform cooling and heating. Hereinafter, the function of the heat pump will be described as an example of a refrigeration cycle.

The refrigeration cycle comprises a compressor, a condenser, an expansion valve, and an evaporator. The refrigerant boils in the evaporator and absorbs heat from the outside. The refrigerant gas is compressed by the compressor into high temperature and high pressure gas and sent to the condenser. And the high-pressure refrigerant gas is condensed and liquefied to reach a low-temperature and high-pressure liquid state.

The refrigerant condensed as described above throttles and expands through the expansion valve, and a part of the refrigerant liquid evaporates. Through the absorption of the latent heat, the refrigerant liquid becomes an abnormal state in which the liquid phase and the vapor phase of the low temperature and low pressure coexist It boils through the evaporator.

The heat pump can be divided into various types according to the method again, but the air heat pump is widely used.

In the conventional two-way refrigeration cycle heat pump system, the evaporation heat of the high-stage evaporator is evaporated by heat exchange (cascade type) with the refrigerant high-temperature gas of the low-stage condenser and using the heat of condensation of the low-

In the heat pump type hot water supply system disclosed in Patent Document 1, a conventional heat pump system using a two-way refrigeration cycle is a system in which water is heated to a high temperature for heating, and a large amount of water is heated Therefore, there is a problem that a large amount of energy is consumed at the time of temperature rise and a time required for the temperature rise is large.

Korean Patent Publication No. 10-2011-56061 (Published on May 26, 2011)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a dual-refrigerating refrigeration cycle in which hot water and water can be heated in a space, And a heat pump system using the heat pump.

According to an aspect of the present invention, there is provided a refrigeration cycle comprising: a first cycle in which a first refrigerant is circulated; A second cycle in which the second refrigerant is circulated; A storage tank unit including a storage tank for storing water therein; A floor heating unit connected to the floor to receive the hot water from the thermal storage tank and to generate floor heating; And an indoor unit having an indoor heat exchanger to allow space cooling and heating,

Wherein the second cycle includes a refrigerant side heat exchanger for performing heat exchange between the circulating first refrigerant in the first cycle and the circulating second refrigerant in the second cycle; And a heat storage side heat exchanger for exchanging heat between the second refrigerant of high temperature and high pressure discharged from the second compressor and the water from the storage tank,

The indoor heat exchanger includes a first branch pipe branched from a connection pipe through which the second refrigerant passes after passing through the second compressor and the heat storage side heat exchanger so as to pass through the indoor heat exchanger and a second branch pipe through which the second refrigerant passing through the indoor heat exchanger flows into the refrigerant side heat exchanger And a second branch pipe connected to be combined with a connection pipe connected to the second expansion valve and the refrigerant side heat exchanger to pass through,

The first branch pipe is provided with a third expansion valve controlled to open and close and expand according to an operation mode, and a fourth expansion valve is provided on the second branch pipe.

A check valve is provided on a connection pipe connected between the heat storage side heat exchanger and the second expansion valve.

In addition, a circulation pipe for allowing heat exchange with the heat storage side heat exchanger is formed in the heat storage tank, and a circulation pump is provided on the circulation pipe so that water is discharged from the heat storage tank.

As described above, the present invention can realize a high temperature water operation mode, a high temperature water and space heating operation mode, a space heating operation mode, a space cooling operation mode, a waste heat recovery and a space cooling operation mode while forming a two- Compared to a system that performs floor heating and space heating through water, space heating and cooling can be performed more quickly through the refrigerant. Since floor heating also utilizes water that has undergone heat exchange through high temperature refrigerant, faster floor heating is achieved There is an effect that can be.

Accordingly, the present invention is capable of cooling and heating (space and floor) in all seasons without the need to separately install a boiler and an air conditioner, and a system with higher efficiency than a conventional boiler (gas or electric boiler) Can be reduced.

FIG. 1 is a configuration diagram of a heat pump system according to an embodiment of the present invention, and is a high temperature water operation mode state.
FIG. 2 is a configuration diagram of a heat pump system according to an embodiment of the present invention, which is a high temperature water and space heating operation mode state.
FIG. 3 is a configuration diagram of a heat pump system according to an embodiment of the present invention, which is a state of a space heating operation mode.
4 is a configuration diagram of a heat pump system according to an embodiment of the present invention, which is a state of a space cooling operation mode.
FIG. 5 is a configuration diagram of a heat pump system according to an embodiment of the present invention, which is a waste heat recovery operation mode and a space cooling operation mode state.

Below. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram illustrating a heat pump system according to an embodiment of the present invention. Referring to FIG. 1, a heat pump system 1 according to an embodiment of the present invention includes a first cycle 10 and a second cycle 20, a storage tank unit 30, a storage tank unit 30 And an indoor unit unit 50 which is supplied with a heat source from the second cycle 20 so as to perform space cooling and heating, thereby forming a two-way refrigeration cycle.

The first cycle (10) includes a first compressor (11) for compressing and discharging the first refrigerant at a high temperature and a high pressure, a first compressor (11) for passing the first refrigerant discharged from the first compressor A first expansion valve 13 for causing the four-way valve 12 and the first refrigerant passing through the first four-way valve 12 to be reduced in pressure and temperature, The first refrigerant passing through the outdoor heat exchanger (14) is returned to the first compressor (11) via the first four-way valve (12).

An accumulator (15) is provided on one side of the first compressor (11).

The second cycle 20 includes a second compressor 21 for compressing and discharging the second refrigerant at a high temperature and a high pressure similarly to the first cycle 10, , A second four-way valve (22) for passing a second refrigerant of high pressure, and a second expansion valve (23) for allowing the second refrigerant passing through the second four-way valve (22) The second refrigerant, which has been warmed by passing through the second expansion valve (23), is returned to the second compressor (21) via the second four-way valve (22).

An accumulator 21a is provided on one side of the second compressor 21 in the same manner as the first cycle 10. [

The heat storage tank unit 30 includes a heat storage tank 31 and is connected to a hot water pipe 32 through which hot water is discharged.

The floor heating unit 40 is connected to a hot water supply pipe 41 for receiving hot water from the thermal storage tank 31 and to a water collection pipe 31 for returning water passing through the floor heating unit 40 to the heat storage tank 31 42 are connected to each other.

According to an embodiment of the present invention, in the second cycle 20, the first refrigerant discharged through the first compressor 11 of the first cycle 10 and the second refrigerant discharged through the second compressor 20 of the second cycle 20 And a refrigerant side heat exchanger (24) for effecting heat exchange with the second refrigerant discharged through the compressor (21).

According to an embodiment of the present invention, in the second cycle 20, heat exchange with heat from a high-temperature, high-pressure refrigerant discharged from the second compressor 21 and water from the heat storage tank 31 is performed, (25).

The second refrigerant of a high temperature and a high pressure coming from the second compressor 21 is connected to a refrigerant pipe 26a through which the refrigerant passes through the heat storage side heat exchanger 25, A connecting pipe 26b for allowing the refrigerant to pass through the second expansion valve 23 and a second refrigerant passing through the second expansion valve 23 to pass through the refrigerant side heat exchanger 24 And a connecting pipe 26d through which the second refrigerant passing through the refrigerant side heat exchanger 24 passes through the second four-way valve 22 is formed.

A check valve 27 is provided on the connection pipe 26b for preventing backflow of the second refrigerant.

The circulation piping 31a and 31b for allowing the heat exchange with the heat storage side heat exchanger 25 are formed in the heat storage tank 31 and the circulation pipes 33a and 31b are formed on the circulation pipe 31a, ).

The refrigerant-side heat exchanger (24) and the heat storage side heat exchanger (25) can be used, for example, employing a plate heat exchanger.

The indoor unit unit 50 includes an indoor heat exchanger 51 and a fan 52. The indoor unit unit 50 includes a first branch pipe (first branch pipe) for branching from the connecting pipe 26b and passing through the indoor heat exchanger 51 And a second branch pipe 29 connected to the refrigerant heat exchanger 24 so that the second refrigerant passing through the indoor heat exchanger 51 passes through the refrigerant side heat exchanger 24 is formed. I have.

A third expansion valve 28a is provided on the first branch pipe 28 and a fourth expansion valve 29a is provided on the second branch pipe 29. [

The operation of the present invention having such a structure will be described below in detail for each operation mode.

[ High temperature water  driving mode ]

As shown in FIG. 1, a heat pump system using a dual refrigeration cycle according to an embodiment of the present invention generates high temperature water of 80 ° C or higher. When the first and second cycles 10 and 20 are operated The first refrigerant circulates while being discharged at a high temperature and a high pressure by the operation of the first compressor 11 constituting the first cycle 10. The first refrigerant discharged from the first compressor 11 at a high temperature and a high pressure 1 refrigerant passes through the refrigerant side heat exchanger 24 via the first four-way valve 12 and then is depressurized and warmed through the first expansion valve 13 and then flows through the outdoor heat exchanger 14 Is again returned to the first compressor (11) through the first four-way valve (12).

At this time, as the second refrigerant is discharged and circulated by the operation of the second compressor (21) constituting the second cycle (20) at a high temperature and a high pressure, the refrigerant in the refrigerant side heat exchanger (24) Action.

At this time, the first refrigerant discharged through the first compressor (11) passes through the refrigerant side heat exchanger (24) and becomes a high temperature state, and the second refrigerant discharged through the second compressor (21) Not through the heat exchanger 24 but through the second expansion valve 23 as well as the heat storage side heat exchanger 25 and is passed through the refrigerant side heat exchanger 24 so that the high temperature first refrigerant The second refrigerant at a low temperature is in a state of heat exchange.

At this time, on the first branch pipe 28 branched from the connection pipe 26a through which the second refrigerant discharged through the second compressor 21 flows, and connected to the indoor heat exchanger 51, a third expansion valve 28a are provided, and the third expansion valve 28a is kept closed.

Since the second refrigerant discharged through the second compressor 21 passes first through the connection pipe 26a in the heat storage side heat exchanger 25, the circulation pump 33 (33a) provided on the circulation pipe 31a The water flowing out of the heat storage tank 31 through the circulation pipe 31a passes through the heat storage side heat exchanger 25 and is recovered into the heat storage tank 31 through the circulation pipe 31b again in the operation of the heat storage side heat exchange The refrigerant is introduced into the heat storage tank 31 in a state of being heated by obtaining the heat source by the second refrigerant of high temperature through the unit 25.

Therefore, the second refrigerant passes through the refrigerant side heat exchanger 24 and is heat-exchanged with the high-temperature first refrigerant discharged through the first compressor 11 to recover the heat source again to the second compressor 21, Since the high temperature second refrigerant discharged through the second compressor 21 passes through the heat storage side heat exchanger 25 in a state of higher temperature, water in the heat storage tank 31 can be more easily heated.

The hot water in the heat storage tank (31) can be used through the hot water pipe (32).

[ High temperature water  And space heating Operation mode ]

FIG. 2 is a view illustrating a high temperature water and space heating operation mode in the heat pump system according to an embodiment of the present invention. As shown in the drawing, the high temperature water operation mode is as described above, Will be described in detail as follows.

That is, when the second refrigerant discharged through the second compressor 21 passes through the heat storage side heat exchanger 25 while the first cycle 10 and the second cycle 20 are operating simultaneously, Water in the hot water supply pipe 31 obtains a heat source in the heat storage side heat exchanger 25 through the circulation piping 31a and 32a by the high temperature second refrigerant and is returned to the hot water tank 31 as hot water, Is sent to the floor heating unit 40 through the return pipe 41 and is recovered into the heat storage tank 31 through the return pipe 42 so that the floor heating is performed.

On the other hand, a third expansion valve 28a is provided on the first branch pipe 28 branched on the connection pipe 26b through which the second refrigerant discharged through the second compressor 21 flows. The refrigerant is condensed while passing through the side heat exchanger 25 and a part of the condensed second refrigerant is made to pass through the third expansion valve 28a completely without passing through the throttling action and then passed through the indoor heat exchanger 51, And travels through the branch piping 29.

Therefore, since the high-temperature second refrigerant passes through the indoor heat exchanger 51, the heat of condensation can be heated by the operation of the fan 52 in the indoor space.

Meanwhile, the second refrigerant flowing through the second branch pipe 29 passes through the fourth expansion valve 29a and is warmed to pass through the refrigerant side heat exchanger 24. At this time, the second branch pipe 29 The second refrigerant passes through the second branch pipe 29 and merges with the connection pipe 26c and flows through the refrigerant side heat exchanger 24 to the second four-way valve 26c 22 to the second compressor (21).

Therefore, heating indoor space with high temperature water has a large amount of heat and a large amount of heat lost to the floor. In the present invention, indoor floor heating and indoor space heating are simultaneously performed by high temperature water, Floor heating becomes possible.

[Space heating Operation mode ]

FIG. 3 is a configuration diagram illustrating a space heating operation mode in the heat pump system according to an embodiment of the present invention. As shown in FIG. 3, for example, the operation mode is operated when space heating is required in the heat cycle.

First, the first cycle 10 is activated and the second expansion valve 23 is closed in a state where the second cycle 20 is operating. The third expansion valve 28a provided on the first branch pipe 28 is opened.

Then, the high-temperature second refrigerant discharged through the second compressor 20 flows through the first branch pipe 28 and passes through the indoor heat exchanger 51, thereby heating the indoor space.

The second refrigerant that has passed through the indoor heat exchanger 51 is warmed while passing through the fourth expansion valve 29a through the second branch pipe 29 and passes through the refrigerant side heat exchanger 24. At this time, And the second refrigerant passes through the refrigerant-side heat exchanger 24 and is discharged from the first refrigerant discharged from the first compressor 10 of the first cycle 10 and circulated, The refrigerant is recovered to the second compressor 21 via the second four-way valve 22 again.

In the space heating operation mode, the thermal storage tank unit 30 and the floor heating unit 40 are in a non-operating state.

[Space cooling Operation mode ]

FIG. 4 is a view illustrating a space cooling mode in a heat pump system according to an embodiment of the present invention. As shown in the figure, when the first and second cycles 10 and 20 are operated, The first refrigerant of high temperature and high pressure discharged through the first compressor 11 of the first cycle 10 is first passed through the first four-way valve 12 and then supplied to the outdoor heat exchanger 14 through the first expansion valve 13 and then through the refrigerant-side heat exchanger 24 in a state of being warmed through the first expansion valve 13, and is recovered to the first compressor 11 while passing through the first four-

The second compressor 21 constituting the second cycle 20 passes through the second four-way valve 22 and the refrigerant-side heat exchanger 24 and is cooled down through the refrigerant-side heat exchanger 24 And passes in a state of heat exchange with the first refrigerant.

The second refrigerant that has passed through the refrigerant side heat exchanger 24 passes through the fourth expansion valve 29a and passes through the indoor heat exchanger 51 in a state of being warmed, (28) through the second four-way valve (22) to the second compressor (21).

The second refrigerant passes through the fourth expansion valve 29a in a state in which the heat source is deprived through the refrigerant side heat exchanger 24 and is then warmed and passes through the indoor heat exchanger 51 so that the indoor space cooling can be effectively performed .

The second refrigerant can pass through the second expansion valve 23 through the connection pipe 26c while moving to the second branch pipe 29. The second expansion valve 23 And the check valve 27 is further provided on the connecting pipe 26b to prevent the second refrigerant from moving to the heat storage side heat exchanger 25 because the refrigerant is more reliably blocked from moving.

[Waste heat recovery Operation mode  And space cooling Operation mode ]

FIG. 5 is a block diagram of a heat pump system according to an embodiment of the present invention, showing a waste heat recovery operation mode and a space cooling operation mode.

As shown in the drawing, when the first cycle 10 is in the stopped state and the second cycle 20 is operated, the high temperature (high temperature) discharged from the operation of the second compressor 21 in the second cycle 20 , The second refrigerant of high pressure is condensed while passing through the heat storage side heat exchanger 25 and passes through the third expansion valve 28a through the first branch piping 28 to pass through the indoor heat exchanger 51 So that indoor space cooling can be effectively performed.

In the indoor space cooling operation, the water in the heat storage tank 31 passes through the heat storage side heat exchanger 25 through the circulation pipe 31a by the operation of the circulation pump 31. At this time, The water from the heat storage tank 31 obtains a heat source from the second refrigerant at a high temperature and becomes hot water and is recovered into the heat storage tank 31 so that hot water can be used through the hot water supply pipe 41 .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, But fall within the scope of the appended claims.

1: Heat pump system
10: First cycle
11: First compressor
12: First four-way valve
13: first expansion valve
14: outdoor heat exchanger
20: 2nd cycle
21: Second compressor
22: second four-way valve
23: a second expansion valve
24: Refrigerant side heat exchanger
25: Heat storage side heat exchanger
26a, 26b, 26c, 26d: connection piping
27; Check valve
28: 1st quarter piping
28a: third expansion valve
29: Second quarter piping
29a: Fourth expansion valve
30: heat storage tank unit
31:
31a, 31b: Circulating piping
32: Hot water pipe
33: circulation pump
40: Floor heating unit
41: hot water supply pipe
42: Recovery pipe
50: indoor unit unit
51: Indoor heat exchanger
52: Fans

Claims (3)

A first cycle (10) in which the first refrigerant is circulated;
A second cycle (20) in which the second refrigerant is circulated;
A storage tank unit (30) including a storage tank (31) for storing water inside;
A floor heating unit (40) connected to the floor to receive the hot water from the thermal storage tank (31) and to provide floor heating;
An indoor unit (50) having an indoor heat exchanger (51) so that the indoor space can be cooled and heated;
/ RTI >
The second cycle (20)
A refrigerant side heat exchanger (24) for exchanging heat between the circulating first refrigerant in the first cycle (10) and the circulating second refrigerant in the second cycle (20);
A heat storage side heat exchanger (25) for exchanging heat between the second refrigerant of high temperature and high pressure discharged from the second compressor (21) and the water from the storage tank (31);
/ RTI >
The indoor heat exchanger (51)
A first branch pipe 28 branched from a connection pipe 26b connected to the second refrigerant after passing through the second compressor 21 and the heat storage side heat exchanger 25 to pass through the indoor heat exchanger 51, The second refrigerant passing through the indoor heat exchanger 51 is connected to the connection pipe 26c connected to the second expansion valve 23 and the refrigerant side heat exchanger 24 so as to pass through the refrigerant side heat exchanger 24 And a second branch pipe (29)
The third branch pipe 29 is provided with a fourth expansion valve 29a on the first branch pipe 28 and a third expansion valve 28a controlled to open and close and expand according to the operation mode. Wherein the heat pump system is a two-stage refrigeration cycle.
The method according to claim 1,
And a check valve (27) is provided on a connection pipe (26b) connected between the heat storage side heat exchanger (25) and the second expansion valve (23).
The method according to claim 1,
The heat storage tank 31 is provided with circulation pipes 31a and 31b for performing heat exchange with the heat storage side heat exchanger 25 and circulation pumps 31a and 31b are provided on the circulation pipe 31a, 33) are provided in the heat pump system.
KR1020150061505A 2015-04-30 2015-04-30 A Heatpump System Using Duality Cold Cycle KR101658021B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2021106084A1 (en) * 2019-11-26 2021-06-03
KR102515801B1 (en) * 2022-09-26 2023-03-30 주식회사 엠티에스 Air heat pump system with dual cycle that produces hot or cold water with a fixed water outlet temperature at an arbitrary incoming temperature due to a variable water flow rate

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008121982A (en) * 2006-11-13 2008-05-29 Matsushita Electric Ind Co Ltd Refrigerating cycle device
KR20110056061A (en) 2009-11-20 2011-05-26 엘지전자 주식회사 Heat pump type cooling/heating apparatus
KR20150035012A (en) * 2013-09-27 2015-04-06 오텍캐리어 주식회사 Heat Storaging Type Heat Pump Boiler System

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008121982A (en) * 2006-11-13 2008-05-29 Matsushita Electric Ind Co Ltd Refrigerating cycle device
KR20110056061A (en) 2009-11-20 2011-05-26 엘지전자 주식회사 Heat pump type cooling/heating apparatus
KR20150035012A (en) * 2013-09-27 2015-04-06 오텍캐리어 주식회사 Heat Storaging Type Heat Pump Boiler System

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2021106084A1 (en) * 2019-11-26 2021-06-03
JP7146117B2 (en) 2019-11-26 2022-10-03 三菱電機株式会社 refrigeration cycle equipment
KR102515801B1 (en) * 2022-09-26 2023-03-30 주식회사 엠티에스 Air heat pump system with dual cycle that produces hot or cold water with a fixed water outlet temperature at an arbitrary incoming temperature due to a variable water flow rate

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