KR101972638B1 - Alternate heat exchanger type heat pump system - Google Patents

Alternate heat exchanger type heat pump system Download PDF

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Publication number
KR101972638B1
KR101972638B1 KR1020160098085A KR20160098085A KR101972638B1 KR 101972638 B1 KR101972638 B1 KR 101972638B1 KR 1020160098085 A KR1020160098085 A KR 1020160098085A KR 20160098085 A KR20160098085 A KR 20160098085A KR 101972638 B1 KR101972638 B1 KR 101972638B1
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South Korea
Prior art keywords
heat exchanger
heat
heating
cooling
circulation line
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KR1020160098085A
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Korean (ko)
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KR20180014570A (en
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윤명진
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윤명진
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02Defrosting cycles
    • F25B47/022Defrosting cycles hot gas defrosting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00Machines, plants or systems, using particular sources of energy
    • F25B27/02Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02Defrosting cycles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B6/00Compression machines, plants or systems, with several condenser circuits
    • F25B6/02Compression machines, plants or systems, with several condenser circuits arranged in parallel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/002Compression machines, plants or systems with reversible cycle not otherwise provided for geothermal
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/025Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • F25B2313/0251Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units being defrosted alternately
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/06Damage
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/28Means for preventing liquid refrigerant entering into the compressor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/25Control of valves
    • F25B2600/2507Flow-diverting valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/25Control of valves
    • F25B2600/2513Expansion valves
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine

Abstract

The present invention relates to a heat exchanger alternating-type heat pump system of a new structure capable of alternately operating a heat exchanger by a simple structure, providing convenience in manufacturing, and capable of alternately operating a plurality of heat sources at any time.
According to the present invention, the compressor 31, the load side (indoor side) heat exchanger 32, the expansion valves 33 and 34, the heat source side (outdoor side ) Heat exchangers (35, 36), the heat pump system comprising: A first heat source side (outdoor side) heat exchanger (35) and a second heat source side (outdoor side) heat exchanger (36) connected to the circulation line (20) so as to selectively perform cooling and heating operation or defrost operation; A cooling / heating switching valve (37) provided on the circulation line (20) so as to be positioned on the compressor (31) side and adapted to switch the flow of the heating medium according to cooling or heating operation; (Outdoor) heat exchanger (35) or the second heat source side (outdoor side) heat exchanger (36) side provided on the circulation line (20) separately from the cooling / heating switching valve (37) And a heat exchanger switching valve (38) for switching the heating medium to the heat exchanger.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump system,

The present invention relates to a heat exchanger alternating-type heat pump system, and more particularly, to a heat pump system in which a heat exchanger is alternately operated by a simple structure to provide convenience in manufacturing, Structure heat pump system.

Generally, an air conditioning or heat pump system is an apparatus (or system) that supplies cold / hot water or cooling / heating by absorbing or releasing heat through a phase change of a refrigerant circulating through a compressor, a condenser, an evaporator and an expansion valve, An example of a pump will be described with reference to the drawings.

1, a compressor 11, a first heat exchanger 12, a second heat exchanger 13, and an expansion valve 14 (not shown), which are interconnected by a circulation line 20 to form a circulation cycle of the refrigerant, And a switching valve 16 capable of switching the flow of the refrigerant according to cooling (or cold water) and heating (or hot water) is provided on the side of each of the expansion valves 14 and 15, Check valves (17, 18) are provided to change the flow of the refrigerant.

In this configuration, the first heat exchanger (12) and the second heat exchanger (13) operate as a condenser or an evaporator according to a cooling or heating mode, and the expansion valves (14, 15) And the refrigerant is expanded by separate expansion valves (14, 15) so as to be circulated.

In such a heat pump, a line to a load side such as cooling (or cold water) and heating (or hot water) is connected to any one of the first heat exchanger and the second heat exchanger. Conventionally, There is a limitation in improving heat exchange efficiency due to the fact that no separate heat source such as geothermal heat, wastewater or outdoor air is connected, and a single heat source is connected to use different heat sources as needed or selectively There is a limit to

Generally, the heat pump is installed in the first heat exchanger (12) or the second heat exchanger (13), which is installed outdoors as the outdoor temperature is low at the time of heating (or hot water production) And the defrosting operation is required to separate the defrosting operation for defrosting. However, the conventional heat pump shows a remarkable difference in operating ability due to seasonal factors (outdoor temperature) (Normal hot gas defrosting) is performed by guiding the hot gas of high temperature and pressure generated by the heat pump 11 to the side of the second heat exchanger 13 located on the outdoor side. In this case, The heating by the first heat exchanger 12 is temporarily interrupted to supply the hot gas to the second heat exchanger 13, which makes it impossible to continuously supply heating gas.

Also, when the compressor (11) is restarted in the steady state as the defrosting operation is performed in the state where the operation of the compressor (11) is stopped, the conventional heat pump is operated so that the liquid refrigerant condensed from the second heat exchanger There is a fear that the compressor may be burned due to liquid compression as the refrigerant flows into the compressor 11, which may cause a failure or damage of the apparatus.

Korean Unexamined Patent Publication No. 1998-017695 1998. 06. 05.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a heat exchanger having a plurality of heat exchangers capable of alternate operation, Type heat pump system of a new structure capable of increasing the thermal efficiency during normal operation and defrosting operation by allowing different heat sources to be connected to each of the heat exchangers so that the alternating or selective operation can be performed at any time, .

According to a feature of the present invention, there is provided a heat pump system comprising a compressor (31), a condenser, expansion valves (33, 34) and an evaporator interconnected by a circulation line (20)

And is connected to the circulation line 20 so as to operate as the condenser or the evaporator and is connected to the loads R, R1 and R2 to supply cooling (cold water) or heating (hot water) A first heat exchanger (32) connected to a heat source (S, S1, S2);

The first heat exchanger (32) is connected to the first heat exchanger (32) to operate as the evaporator or the condenser, and the heat medium on the circulation line (20) Second and third heat exchangers (35, 36) corresponding to the heat sources (S, S1, S2) or loads (R, R1, R2);

And the second heat exchanger (35) and the third heat exchanger (36) are disposed to be located at the front end or the rear end of the expansion valves (33, 34) in accordance with the flow direction of the heat medium in the circulation line (20) And a heat exchanger switching valve (38) for selectively switching the heating medium to the second heat exchanger (35) or the third heat exchanger (36) so that the heating medium can pass through the heat exchanger Heat Exchanger Alternating Type Heat Pump System is provided.

According to another aspect of the present invention, the compressor (31) is provided with a cooling / heating switching valve (37) provided on the circulation line (20) for switching the flow of the heating medium according to cooling or heating operation Heat Exchanger Alternating Type Heat Pump System is provided.

When loads (R, R1, R2) are connected to the first heat exchanger (32) side, the second heat exchanger (35) and the third heat exchanger (36) When one heat source S1 or a second heat source S2 is connected and the heat sources S, S1 and S2 are connected to the first heat exchanger 32 side, (R2) are connected to the heat exchanger.

According to another aspect of the present invention, the expansion valve (33, 34) includes a first heat exchanger (32) and a heat exchanger switch valve (38) positioned between the first heat exchanger (32) And a second expansion valve (34) positioned between the second heat exchanger (35) and the third heat exchanger (36). The heat pump system do.

According to another aspect of the present invention, a fourth heat exchanger (44) corresponding to the second and third heat exchangers (35, 36) and operated as a condenser or an evaporator is provided on the first heat exchanger (32) side And other heat exchanger switching valves 45 and 46 selectively switching the heating medium to the first heat exchanger 32 or the fourth heat exchanger 44 are connected to the circulation line 20 Heat Exchanger Alternating Type Heat Pump System is provided.

According to another aspect of the present invention, a high-temperature supply line 50 through which the second heat exchanger 35 and the third heat exchanger 36 are continuously passed is connected to the load (R, R1, R2) The heat pump system comprising:

As described above, according to the present invention, the first heat exchanger 32, which is operated by the condenser or the evaporator, is connected to the circulation line 20, and the evaporator or the condenser, corresponding to the first heat exchanger 32, The second heat exchanger 35 and the third heat exchanger 36 are used so that both of the two heat exchangers 35 and 36 are used during the cooling and heating operation or any of the second heat exchanger 35 and the third heat exchanger 36 By selectively using one of them, it is possible to cope with various loads (R, R1, R2) efficiently, and to be used alternatively when a failure or malfunction occurs, thereby causing problems due to wear or consumption due to continuous operation of the apparatus It is possible to solve the problem.

Further, according to the present invention, it is possible to perform continuous operation without temporarily stopping the supply of heating even during the defrosting operation, and to prevent the condensed liquid from flowing into the compressor (31) when the compressor (31) There is an advantage that it is possible to prevent the device from being burned down due to the liquid compression by the compressor (31).

In addition to the cooling / heating switching valve 37 for switching the flow of the heating medium in accordance with the cooling or heating operation, the present invention also includes a heat exchanger (not shown) for selectively switching the heating medium to the second heat exchanger 35 or the third heat exchanger It is very easy to control the heating medium to selectively flow to the second or third heat exchanger 35 or 36 by the heat exchanger switching valve 38 by the switching valve 38, It is advantageous in that it is possible to provide convenience in manufacturing and maintenance.

The first heat source S1 and the second heat source 31 are provided to the second heat exchanger 35 and the third heat exchanger 36 among the heat sources S, S1 and S2 such as geothermal heat, The second heat exchanger 35 and the third heat exchanger 36 can be selectively used in consideration of the seasonality and characteristics of the operation environment, There is an advantage that operation can be performed with optimized heat exchange efficiency.

The present invention also includes a first expansion valve 33 and a second expansion valve 34 that are selectively operated during cooling or heating operation so that the temperature of the refrigerant discharged from the heat exchange switching valve 37 and the heat exchanger switching valve 38 There is an advantage that it can be easily operated according to the flow of the heat medium for the cooling operation, the heating operation, or the defrost operation even when the valve configuration is minimized.

1 is a schematic view showing an example of a conventional heat pump system
Figure 2 illustrates a configuration and heat exchange flow diagram according to one embodiment of the present invention.
FIG. 3 is a flow diagram of another heat exchange flow diagram in accordance with an embodiment of the present invention.
Figure 4 illustrates another heat exchange flow diagram in accordance with an embodiment of the present invention.
Figure 5 is a flow diagram of another heat exchange flow diagram according to one embodiment of the present invention.
Figure 6 illustrates another heat exchange flow diagram in accordance with one embodiment of the present invention.
FIG. 7 illustrates another heat exchange flow diagram according to an embodiment of the present invention.
Figure 8 is a flow diagram of a heat exchange process according to another embodiment of the present invention.
Figure 9 is a flow diagram of another heat exchange flow diagram according to another embodiment of the present invention.
Figure 10 shows another heat exchange flow diagram according to another embodiment of the present invention.
11 shows another heat exchange flow diagram according to another embodiment of the present invention.
12 shows another heat exchange flow chart according to another embodiment of the present invention
Figure 13 illustrates another heat exchange flow diagram according to another embodiment of the present invention.
14 is a flowchart illustrating a heat exchange flow chart according to another embodiment of the present invention.
Figure 15 is a flow chart of another heat exchange flow diagram according to another embodiment of the present invention.
Figure 16 shows another heat exchange flow diagram according to another embodiment of the present invention
17 shows another heat exchange flow chart according to another embodiment of the present invention
Figure 18 shows another heat exchange flow diagram according to another embodiment of the present invention
Figure 19 is a schematic diagram of a configuration and heat exchange flow diagram according to still another embodiment of the present invention.
20 is a flowchart illustrating a heat exchange flow chart according to another embodiment of the present invention.
Figure 21 is a flow diagram of a heat exchange according to another embodiment of the present invention.
22 is a flowchart illustrating a heat exchange flow chart according to another embodiment of the present invention.
23 is a flowchart illustrating a heat exchange flow chart according to another embodiment of the present invention.

The objects, features and advantages of the present invention will become more apparent from the following detailed description. Hereinafter, description will be made with reference to the accompanying drawings.

Figures 2 to 23 illustrate various embodiments of the present invention. 2, the present invention includes a plurality of other heat exchangers (35, 36) corresponding to the first heat exchanger (32) operated by a condenser or an evaporator and operated by an evaporator or a condenser, The present invention relates to a heat exchanger alternating-type heat pump system which can be used as a heat exchanger (32) and a heat exchanger (32) which is adapted to perform heat exchange in accordance with a phase change of a heat medium by a circulation line (20) And the second and third heat exchangers 35 and 36 are connected to each other through the circulation line 20. The circulation line 20 is connected to the compressor (not shown) according to cooling (or cold) And a heating / cooling switching valve 37 for switching the flow of the heating medium supplied from the heating /

In this configuration, the first heat exchanger 32 corresponds to an ordinary indoor unit to which the cold / hot water line 40 on the side of the load R is connected so as to supply cooling / heating (or cold / hot water) The third heat exchangers (35, 36) are adapted to discharge outside heat of the heat medium or to absorb external heat corresponding to ordinary outdoor units. Each of the heat exchangers (32, 35, 36) It works as a condenser.

In the present invention, the configuration of the second and third heat exchangers (35, 36) is such that the second heat exchanger (35, 36) can be alternately operated depending on the steady operation for supplying cooling and heating, defrosting operation for defrosting operation, And a third heat exchanger 36. The circulation line 20 is provided with a heat exchanger switching valve 38 for controlling the flow of the heat medium depending on the operating state.

The second and third heat exchangers 35 and 36 may be provided to circulate the heat sources S1 and S2 such as geothermal heat or waste heat (wasted hot water) or outdoor air to enable heat exchange. The first heat source S1 corresponding to any one of the heat sources S1 and S2 is heat exchangeable and the second heat source S1 different from the first heat source S1 is provided in the third heat exchanger 36. [ (S2) is provided so as to be heat-exchangeable. At this time, the heat sources S1 and S2 such as the geothermal heat and the waste heat heat are connected to the separate heat source supply line 41. However, when using the outside heat, the separate heat source supply line 41 may not be directly connected.

When the heat sources S1 and S2 are coupled to the second and third heat exchangers 35 and 36, the heat efficiency of the heat exchangers 35 and 36 is improved by heat exchange with the heat sources S1 and S2 The cooling / heating effect by the first heat exchanger 32 can be maximized and the overall coefficient of performance of the device can be improved.

Particularly, when the first heat source S1 and the second heat source S2 mutually coupled to the second and third heat exchangers 35 and 36 are coupled to each other, the supply state of the heat sources S1 and S2 and the seasonality The second heat exchanger 35 and the third heat exchanger 36 may alternatively be used alternately or at different times depending on a temperature change depending on the temperature of the first heat exchanger 35 or an operating environment such as an installation place.

In addition, on the circulation line 20, expansion valves 33 and 34 for reducing the pressure of the heat medium passing through the respective heat exchangers 32, 35 and 36, which operate as a condenser according to cooling or heating operation, The valves 33 and 34 may be provided separately from the first expansion valve 33 and the second expansion valve 34 that are selectively operated during the cooling or heating operation, A check valve 42 or an electronic on-off valve 43 is provided so that the heating medium can be bypassed in accordance with the heating operation and the second expansion valve 34 is provided with a general electronic expansion So that the heat medium can be flowed in both directions.

 The specific operation state according to one embodiment of the present invention will now be described with reference to FIGS. 2 to 7. FIG. 2 shows a heating operation by the first heat source side (outdoor side) heat exchanger 35. This is because the heating medium supplied from the compressor 31 is supplied to the first heat exchanger 32 by the load (R The heat medium that has passed through the first heat exchanger 32 bypasses the first expansion valve 33 through the check valve 42 and flows into the heat exchanger 32 via the check valve 42, And is supplied to the switching valve 38 side.

Thereafter, the refrigerant is directly passed through the third heat exchanger 36 by the heat exchanger switching valve 38, and heat exchange is performed sequentially through the second expansion valve 34 and the second heat exchanger 35 And the heat medium having passed through the second heat exchanger 35 flows into the compressor 31 by the heat exchanger switching valve 38. At this time, the third heat exchanger 36 is stopped So that heat exchange with the heating medium is not performed, and only the heat medium passes through as it is, and the electromagnetic opening / closing valve 43 on the side of the second expansion valve 34 is closed.

3, in the case of the heating operation by the third heat exchanger 36, the heat medium having undergone the heat exchange with the load (R) side in the first heat exchanger (32) flows through the heat exchanger switching valve After passing through the second heat exchanger 35 by the first expansion valve 38 and the second expansion valve 34 and the third heat exchanger 36 in succession, The expansion valve 34 is bi-directionally flowable as described above, so that the heat medium can flow from the second heat exchanger 35 to the third heat exchanger 36 side.

4 and 5, in the case of cooling operation, the heating medium supplied from the compressor 31 flows to the heat exchanger switching valve 38 side through the cooling / heating switching valve 37, The primary switching valve 38 selectively causes the heating medium to flow to the second heat exchanger 35 or the third heat exchanger 36 operated as a condenser.

Thereafter, the heating medium passes through the second heat exchanger (35) and the third heat exchanger (36) as it bypasses the second expansion valve (34) as the electromagnetic opening / closing valve (43) , Heat exchange with the load (R) side is performed in the first heat exchanger (32) via the first expansion valve (33) by the heat exchanger switching valve (38).

On the other hand, the defrosting operation for any one of the second heat exchanger 35 and the third heat exchanger 36 during the heating operation will be described with reference to FIGS. 6 and 7. FIG. 6 shows the defrosting operation of the second heat exchanger 35. This is because the heating medium supplied from the compressor 31 is supplied to the first heat exchanger 32 by the first heat exchanger 32 as in the above- R), and the heating medium having passed through the first heat exchanger 32 is supplied to the second heat exchanger 35 by the heat exchanger switching valve 38 At this time, in the second heat exchanger (35), the defrosting operation is performed as the heating medium passes while the fan motor (39) is stopped, and heat exchange is performed in the third heat exchanger (36) .

7 shows the defrosting operation of the third heat exchanger 36. This is because the heat exchanger switching valve 38 is connected to the third heat exchanger 36 by the above- The third heat exchanger 36 is defrosted as the heat medium passes through the fan motor 39 while the fan motor 39 is stopped, and the second heat exchanger 36, which is operated by the evaporator, Heat exchange is performed in the heat exchanger 35.

Here, during the defrosting operation, as the high-temperature and high-pressure heat medium supplied from the compressor 31 first passes through the first heat exchanger 32, the device exerts the best heat exchange efficiency and exhibits the heating effect. The defrosting operation of the second or third heat exchanger (35, 36) is performed.

In the present invention, since the defrosting operation is performed after the heat exchange by the first heat exchanger (32), the heat medium at the outlet side of the second heat exchanger (35) or the third heat exchanger (36) As a result of being supplied to the second expansion valve 34 in a supercooled state, the process of expanding the heat medium to the low temperature and low pressure by the second expansion valve 34 becomes very easy.

The second heat exchanger 35 or the third heat exchanger 35 located at the rear end of the second expansion valve 34 is supplied with the supercooled heat medium as described above in an expanded state by the second expansion valve 34, The heat exchanger 36 not only can increase the heat absorption capacity thereof but also has an effect of increasing the overall heating capacity and the coefficient of performance of the apparatus.

8 to 13, the cooling / switching valve 37 may not be provided on the circulation line 20 on the compressor 31 side. In this case, the heating / cooling operation A heat pump system that can independently perform the heat pump system.

8 and 9 illustrate the heating operation by the second heat exchanger 35 and the third heat exchanger 36, and FIGS. 10 and 11 illustrate the heating operation by the second heat exchanger 35 and the second heat exchanger 35. FIG. FIG. 12 and FIG. 13 show the defrosting operation by the second heat exchanger 35 and the third heat exchanger 36, and specific operation The state is the same as already mentioned in Figs. 2 to 7 described above.

The first heat exchanger 32 is connected to the load R and the first heat source S1 and the second heat source S are connected to the second heat exchanger 35 and the third heat exchanger 36, A heat source S is connected to the first heat exchanger 32 and a first load R1 and a second load R2 are connected to the second and third heat exchangers 35 and 36 Which will be described with reference to FIG. 14 to FIG. 18 as follows.

14, a heat source supply line 41 is connected to the first heat exchanger 32 so as to allow heat exchange with the heat source S, and the second and third heat exchangers 35 and 36 The first load R1 and the second load R2 are connected by the cold / hot water line 40 to supply cooling (cold water) or heating (hot water or hot water) to the second heat exchanger 35, The cooling operation will be described as follows.

In the cooling operation by the second heat exchanger 35, the first heat exchanger 32 is operated as a condenser and the second heat exchanger 35 is operated as an evaporator to cool the first load R1 Cold water).

Specifically, the heating medium supplied from the compressor 31 is supplied to the heat exchanger 36 via the first heat exchanger 32, the check valve 42, and the heat exchanger switching valve 38 to the third heat exchanger 36, At this time, the heating medium is maintained at a high temperature and a high pressure so that hot water (particularly, hot water) can be supplied to the second load R2 side by the second heat exchanger 36, (Cold water) to the first load (R1) side by the second heat exchanger (35) as it is supplied to the second heat exchanger (35) through the second expansion valve (34).

In this case, the heat medium at the outlet side of the third heat exchanger (36) is supercooled in the second expansion valve (34) in a supercooled state, as described above, The process of expanding the heat medium to the low temperature and low pressure by the second expansion valve 34 becomes very easy so that the supercooled heat medium is expanded into the expanded state by the second expansion valve 34 It is possible to increase the heat absorption capacity of the second heat exchanger 35 positioned at the rear end of the second expansion valve 34 and to increase the overall heating capacity and the coefficient of performance of the device Effect.

15, in the cooling operation by the third heat exchanger 36, the heat medium supplied from the compressor 31 is supplied to the second heat exchanger 35 by the heat exchanger switching valve 38, (Hot water) is supplied to the first load R1 side and then the cooling water (cold water) is supplied to the second load R2 side by the third heat exchanger 36 .

16 and 17, even when the cooling / heating switching valve 37 is not provided, the heating medium passing through the first heat exchanger 32 is supplied to the heat exchanger switching valve 38 The hot water (hot water) is supplied by the third heat exchanger 36 as shown in FIG. 16 as the heating medium is supplied to the second heat exchanger 35 or the third heat exchanger 36, (Hot water) is supplied by the second heat exchanger 35 as shown in FIG. 17 and the cooling water (hot water) is supplied by the third heat exchanger 36 to the cooling (cold water) Can be supplied.

18, when the heating or hot water (hot water supply) is supplied by the second and third heat exchangers 35 and 36 during the defrosting operation, the second heat exchanger 32 and the second heat exchanger 32 The fan motor 39 on the side of the second heat exchanger 32 is stopped to remove the refrigerant gas and the refrigerant gas and the refrigerant gas is supplied to the respective switching valves 37 and 38, the expansion valves 33 and 34, the check valve 42, 43 and the like are switched.

By this operation, in contrast to the heating operation, the high-temperature and high-pressure heat medium supplied from the compressor 32 is preferentially passed through the second heat exchanger 32 in accordance with the flow of the heat medium, The heating medium can be supplied with some hot water as the temperature of the heating medium is lowered through the third heat exchanger 36 and the second heat exchanger 35 is operated as a normal evaporator.

In addition, in the present invention, the fourth heat exchanger (44) is further connected to the first heat exchanger (32) side so that either one of them can be used selectively or both of them can be used. The following is an explanation.

The first heat exchanger 32 and the fourth heat exchanger 44 may be further provided with a fourth heat exchanger 44 as shown in FIG. The first heat exchanger 32 and the fourth heat exchanger 44 can be operated as a condenser or an evaporator in accordance with the second and third heat exchangers 35 and 36 in accordance with the cooling / A heat source S1 and a second heat source S2 are connected to each other and heat exchange is performed on the circulation line 20 for switching the flow of the heat medium at the inlet side or the outlet side of the first and fourth heat exchangers 32, A first heat source S1 and a second heat source S2 are provided on the side of the heat exchangers 32 and 44 on the sides of the second and third heat exchangers 35 and 36, It is natural that the first load R1 and the second load R2 can be connected when combined.

According to such a configuration, regardless of the presence or absence of the cooling / heating changeover valve 37 and the connection positions of the first and second loads R1 and R2 or the first and second heat sources S1 and S2 in the system, Alternatively, during the heating operation, the first heat exchanger 32 and the fourth heat exchanger 44 may be selectively used, or heat exchange may be performed using both the first and fourth heat exchangers 32 and 44, 20 will be described as follows.

20 (a), during the cooling operation, the heat medium supplied from the compressor 31 is supplied to the first heat exchanger 32 and the fourth heat exchanger 44 The heat exchangers 32 and 44 may be circulated through both the heat sources S1 and S2 so that heat exchange with the heat sources S1 and S2 or heat exchange with the heat sources S1 and S2 is allowed to pass therethrough. A separate electromagnetic opening / closing valve 46 is connected to the first expansion valve 33 so as to control the flow of the heating medium.

20 (b), during the heating operation, the heat medium flowing through the second and third heat exchangers 35 and 36 flows through the first heat exchanger 32 or the fourth heat exchanger 44 Passes through the fourth heat exchanger (44) or the first heat exchanger (32) operated by the evaporator via the first expansion valve (33).

According to this configuration, when any one of the heat exchangers (32, 44) is faulty or needs to be repaired, it is not only possible to operate continuously by the other but also the heat exchanger So that the thermal efficiency can be increased.

On the other hand, the high-temperature supply line 50 through which the supply water is continuously supplied to the load (R) through the second heat exchanger (35) and the third heat exchanger (36) to supply hot water or hot water can be connected. 21 to 23 will be described as follows.

As shown in FIG. 21, when the heating or hot water is supplied to the load (R) side during the heating operation, in the process of continuously passing the supply water through the second and third heat exchangers (35, 36) (35, 36), and hot water of high temperature can be supplied.

Specifically, the high-temperature hot gas (heat medium) supplied from the compressor 31 is sequentially passed through the third heat exchanger 36 and the second heat exchanger 35 by the heat exchanger switching valve 38 The supply water supplied from the load R is sequentially passed through the second heat exchanger 35 and the third heat exchanger 36, This is because while the heat medium on the circulation line 20 sequentially passes through the third heat exchanger 36 and the second heat exchanger 35, the feed water on the side of the load R forms a counter flow with the heat medium, After the preheating is performed in the second heat exchanger (35), the main heating with the hot gas is performed in the third heat exchanger (36), and hot water can be produced.

22 and 23, when the cooling and heating operation can be selectively performed by the cooling / heating switching valve 37, a separate bypass line 51 is connected to the high-temperature supply line 50 A plurality of control valves 52 to 54 can be provided on the high temperature supply line 50 and the bypass line 51 to control the flow of the supply water according to the cooling or heating operation.

Specifically, in the case of the heating operation, as described above, the supply water on the side of the load R sequentially flows through the second heat exchanger 35 and the third heat exchanger 36. To this end, The control valves 52 and 53 on the bypass line 51 are opened and the control valve 54 on the bypass line 51 is closed.

Instead of shutting off the flow of the supply water to the third heat exchanger 36 by closing the control valves 52 and 53 on the high-temperature supply line 50 in the cooling operation, the control on the bypass line 51 The valve 54 is opened so that the supplied water is bypassed to supply cooling.

In this heating or cooling operation, the hot water can be supplied by the third heat exchanger 36. To this end, a separate hot water supply line 55 is connected to the third heat exchanger 36, And a pump 56 for pumping hot water may be connected to the hot water supply line 55 as needed.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

20: circulation line 31: compressor
32: first heat exchanger 33, 34: expansion valve
35: second heat exchanger 36: third heat exchanger
37: Heating / cooling switching valve 38,45: Heat exchanger switching valve
40: cold / hot water line 41: heat source supply line
44: third heat exchanger 50: high temperature supply line
51: Bypass line 52-54: Control valve
55: Hot water supply line R: Load
R1: first load R2: second load
S: Heat source S1: First heat source
S2: the second heat source

Claims (6)

A heat pump system comprising a compressor (31) interconnected by a circulation line (20) arranged to circulate a heating medium, a condenser, expansion valves (33, 34) and an evaporator;
And is connected to the circulation line 20 so as to operate as the condenser or the evaporator and is connected to the loads R, R1 and R2 to supply cooling (cold water) or heating (hot water) A first heat exchanger (32) connected to a heat source (S, S1, S2);
The first heat exchanger (32) is connected to the first heat exchanger (32) to operate as the evaporator or the condenser, and the heat medium on the circulation line (20) Second and third heat exchangers (35, 36) corresponding to the heat sources (S, S1, S2) or loads (R, R1, R2);
And the second heat exchanger (35) and the third heat exchanger (36) are disposed to be located at the front end or the rear end of the expansion valves (33, 34) in accordance with the flow direction of the heat medium in the circulation line (20) And a heat exchanger switching valve (38) selectively switching the heating medium to the second heat exchanger (35) or the third heat exchanger (36) so that the heating medium is preferentially passed therethrough;
When the loads (R, R1, R2) are connected to the first heat exchanger (32) side, the second heat exchanger (35) and the third heat exchanger (36) When a heat source S2 is connected and a heat source S, S1, S2 is connected to the first heat exchanger 32 side, another kind of first load R1 or second load R2 is connected;
The expansion valve (33, 34) includes a first expansion valve (33) positioned between the first heat exchanger (32) and the heat exchanger switching valve (38) so as to be selectively operated during cooling or heating operation, And a second expansion valve (34) positioned between the second heat exchanger (35) and the third heat exchanger (36).
The refrigeration system of claim 1, wherein the compressor (31) is provided with a cooling / heating switching valve (37) provided on the circulation line (20) for switching the flow of the heating medium according to cooling or heating operation. Alternative type heat pump system.
delete delete 3. The heat exchanger according to claim 1 or 2, wherein a fourth heat exchanger (44) corresponding to the second and third heat exchangers (35, 36) and operated by a condenser or an evaporator is provided on the first heat exchanger And other heat exchanger switching valves 45 and 46 selectively connected to the first heat exchanger 32 or the fourth heat exchanger 44 are connected to the circulation line 20, Heat Exchanger Alternative Type Heat Pump System.
The high temperature supply line (50) for continuously passing the second heat exchanger (35) and the third heat exchanger (36) is connected to the load (R, R1, R2) Of the heat pump system.
KR1020160098085A 2016-08-01 2016-08-01 Alternate heat exchanger type heat pump system KR101972638B1 (en)

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PCT/KR2017/008094 WO2018026137A1 (en) 2016-08-01 2017-07-27 Heat exchanger alternating-type heat pump system
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