CN111306827B - Wide-ring temperature type CO 2 Air source heat pump system - Google Patents
Wide-ring temperature type CO 2 Air source heat pump system Download PDFInfo
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- CN111306827B CN111306827B CN201911405335.0A CN201911405335A CN111306827B CN 111306827 B CN111306827 B CN 111306827B CN 201911405335 A CN201911405335 A CN 201911405335A CN 111306827 B CN111306827 B CN 111306827B
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- 230000001172 regenerating effect Effects 0.000 claims abstract description 32
- 230000001105 regulatory effect Effects 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000011084 recovery Methods 0.000 claims abstract description 23
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 8
- 238000007906 compression Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 abstract description 4
- 230000008020 evaporation Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 63
- 238000010257 thawing Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention provides a wide-ring temperature type CO 2 An air source heat pump system comprising: low pressure stage CO 2 Compressor, high-pressure section exhaust electronic three-way valve and high-pressure section CO 2 The system comprises a compressor, a heat recovery plate heat exchanger, a regenerative cycle plate heat exchanger, a high-pressure electronic pressure regulating valve, an evaporator, a desuperheater, a gas-liquid separator, a vapor separation electronic pressure regulating valve, a low-pressure section air suction electronic three-way valve and a desuperheater one-way valve; the evaporator and the desuperheater are designed integrally, the subcritical compressor is given pre-heat dissipation and the whole system is given evaporation and absorption heat, the pre-heat dissipation gives heat compensation of evaporation and absorption heat, and the maximum recycling of a heat source is realized. The outdoor temperature change process is to collect data through the controller, the controller program can control the electronic three-way valve to realize the switching of heating cycle, the switching ensures that the system realizes the two-stage compression process under the condition of low ring temperature and realizes the one-stage compression process under the condition of high ring temperature, the safe and reliable operation of the system can be ensured, and meanwhile, the high efficiency of the operation of the system is ensured.
Description
Technical Field
The invention relates to the technical field of heat pump systems, in particular to a wide-ring temperature type CO 2 An air source heat pump system.
Background
With the improvement of the national environmental protection requirements, the winter heating equipment uses electricity from traditional coal burningIs a heat pump system transition of (2). The heat pump system needs to use refrigerant working medium, natural refrigerant CO 2 The excellent heating capacity is favored in the new heat pump system due to its excellent environmental protection characteristics (odp=0, gwp=1). The latitude and north-south span of our country is very big, and the winter ambient temperature in northern area can be as low as-40 ℃, and the temperature span is very big, and ordinary heat pump system is difficult to adapt to the use of northern low-loop temperature.
Disclosure of Invention
According to the technical problems, a wide-ring temperature type CO is provided 2 An air source heat pump system. The invention adopts the following technical means:
wide-ring temperature type CO 2 An air source heat pump system comprising:
low pressure stage CO 2 Compressor, exhaust check valve, high-pressure section exhaust electronic three-way valve, high-pressure section CO 2 The system comprises a compressor, a heat recovery plate heat exchanger, a regenerative cycle plate heat exchanger, a high-pressure electronic pressure regulating valve, an evaporator, a desuperheater, a gas-liquid separator, a vapor-separation electronic pressure regulating valve, a low-pressure section air suction electronic three-way valve, an electric ball valve and a desuperheater one-way valve;
the low pressure section CO 2 One end of the compressor is connected with the high-pressure section CO through a pipeline with a vent check valve by an evaporator and a desuperheater 2 The air inlet pipeline of the compressor is communicated, and a superheater-removing check valve is arranged at the outlet positions of the evaporator and the superheater-removing;
the other end is communicated with one port of the low-pressure section air suction electronic three-way valve through a pipeline; another pipeline of low-pressure section air suction electronic three-way valve and high-pressure section CO 2 The compressor is communicated, the last path of the low-pressure section air suction electronic three-way valve is communicated with the air path of the gas-liquid separator, and the low-pressure section air suction electronic three-way valve and the air path of the gas-liquid separator pass through the regenerative cycle plate heat exchanger;
high pressure section CO 2 The output end of the compressor is communicated with one path of the high-pressure section exhaust electronic three-way valve, the other path of the high-pressure section exhaust electronic three-way valve is communicated with the heat recovery plate type heat exchanger, and the output pipeline of the heat recovery plate type heat exchanger is communicated with the regenerative cycle plateThe heat exchanger is communicated, and an output pipeline communicated with the regenerative cycle plate heat exchanger is finally communicated with an inlet of the gas-liquid separator through the evaporator and the desuperheater; the last path of the high-pressure section exhaust electronic three-way valve is communicated with pipelines of the regenerative cycle plate heat exchanger, which are positioned at the front ends of the evaporator and the desuperheater, and the final path of the high-pressure section exhaust electronic three-way valve is gathered together and then passes through the evaporator and the desuperheater; the high-pressure electronic pressure regulating valve is arranged on a pipeline between the regenerative cycle plate heat exchanger and the evaporator and between the regenerative cycle plate heat exchanger and the desuperheater;
the other output pipeline of the gas-liquid separator is provided with a vapor-separating electronic pressure regulating valve which is finally communicated with the gas path of the gas-liquid separator, and an electric ball valve is arranged between the gas path outlet of the gas-liquid separator and the communication position.
During high-temperature heating, CO is produced from a high-pressure section 2 The compressor uses CO 2 Refrigerant is compressed, refrigerant gas compressed into high temperature and high pressure enters the heat recovery plate heat exchanger through the high pressure section exhaust electronic three-way valve, and water is heated in the heat recovery plate heat exchanger and CO is simultaneously supplied to the heat recovery plate heat exchanger 2 The refrigerant is cooled to form a high-pressure transcritical refrigerant, the transcritical refrigerant is further cooled in a regenerative cycle plate heat exchanger, the refrigerant enters an evaporator after being throttled by a high-pressure electronic pressure regulating valve, the low-pressure refrigerant is evaporated and absorbs heat in the evaporator, the refrigerant after forming low-pressure gas refrigerant enters the regenerative cycle plate heat exchanger after passing through an electric ball valve, and the refrigerant after passing through the plate heat exchanger forms CO in a superheated state 2 And the overheated refrigerant returns to the high-pressure section compressor after passing through the low-pressure section air suction electronic three-way valve, so as to complete the heating cycle. In the operation process of the compressor, the vapor separation electronic pressure regulating valve is opened, so that the oil in the vapor can return to the compressor along with the refrigerant.
During low-ring temperature heating, CO is produced in the low-pressure section 2 The compressor uses CO 2 Refrigerant is compressed, and compressed into refrigerant gas with high temperature and medium pressure to enter an evaporator&Desuperheater in evaporator&CO feed to desuperheater 2 The refrigerant is cooled to form medium-pressure refrigerant, and the medium-pressure refrigerant enters the high-pressure section CO 2 Compression is continued in the compressor, and compression is carried out to prepare the high-temperature high-pressure oil pumpThe refrigerant gas enters a heat recovery plate heat exchanger, and water is heated in the heat recovery plate heat exchanger and CO is simultaneously supplied to the heat recovery plate heat exchanger 2 The refrigerant is cooled to form a high-pressure transcritical refrigerant, the transcritical refrigerant is further cooled in a regenerative cycle plate heat exchanger, the refrigerant enters an evaporator after being throttled by a high-pressure electronic pressure regulating valve, the low-pressure refrigerant is evaporated and absorbs heat in the evaporator, the refrigerant after forming low-pressure gas refrigerant enters the regenerative cycle plate heat exchanger after passing through an electric ball valve, and the refrigerant after passing through the plate heat exchanger forms CO in a superheated state 2 And the overheated refrigerant returns to the low-pressure section compressor after passing through the low-pressure section air suction electronic three-way valve, so as to complete the heating cycle. In the operation process of the compressor, the vapor separation electronic pressure regulating valve is opened, so that the oil in the vapor can return to the compressor along with the refrigerant.
During defrosting, the high-pressure section CO 2 The compressor uses CO 2 The refrigerant is compressed, the refrigerant gas compressed into high temperature and high pressure enters the evaporator after passing through the high pressure section exhaust electronic three-way valve, the high temperature gas is used for defrosting of the evaporator, the high pressure refrigerant after defrosting enters the regenerative cycle plate heat exchanger after being throttled and depressurized by the vapor separation electronic pressure regulating valve, and the high pressure refrigerant returns to the high pressure section compressor after absorbing part of heat through the low pressure section suction electronic three-way valve, so that defrosting cycle is completed.
The invention has the advantages that: wide ring temperature range CO 2 The air source heat pump system can realize the heating process of high-temperature and low-temperature, and can well meet the winter application in northern areas of China. The hot water prepared by the heat pump system can be used for various aspects such as household hot water, heating and the like. The electronic three-way valve is controlled by the controller, so that intelligent conversion can be realized, and good matching performance is realized between system operation and environmental working conditions. The system has strong practicability and universality, accords with the current energy-saving and environment-friendly design concept, and provides a good system design for future heat pump system application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1-a schematic diagram of a high-loop-temperature heating cycle of the present invention.
FIG. 2-a schematic diagram of a low loop temperature heating cycle of the present invention.
FIG. 3-a schematic view of the defrost cycle of the present invention patent.
In the figure: 1-Low pressure section CO 2 Compressor, 2-exhaust check valve, 3-high pressure section exhaust electronic three-way valve and 4-high pressure section CO 2 Compressor, 5-heat recovery plate heat exchanger, 6-regenerative cycle plate heat exchanger, 7-high-pressure electronic pressure regulating valve and 8-evaporator&The device comprises a desuperheater, a 9-gas-liquid separator, a 10-vapor separation electronic pressure regulating valve, an 11-low pressure section air suction electronic three-way valve, a 12-electric ball valve and a 13-desuperheater one-way valve.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
As shown in FIG. 1, the invention provides a wide-ring temperature type CO 2 An air source heat pump system comprising:
low pressure stage CO 2 Compressor 1, exhaust check valve 2, high-pressure section exhaust electronic three-way valve 3, high-pressure section CO 2 The system comprises a compressor 4, a heat recovery plate heat exchanger 5, a regenerative cycle plate heat exchanger 6, a high-pressure electronic pressure regulating valve 7, an evaporator, a desuperheater 8, a gas-liquid separator 9, a vapor-separation electronic pressure regulating valve 10, a low-pressure section air suction electronic three-way valve 11, an electric ball valve 12 and a desuperheater one-way valve 13;
the low pressure section CO 2 One end of the compressor 1 is connected with the high-pressure section CO through a pipeline with a discharge check valve 2 via an evaporator and a desuperheater 8 2 The air inlet pipeline of the compressor 4 is communicated, and a superheater-removing check valve 13 is arranged at the outlet positions of the evaporator and the superheater 8;
the other end is communicated with one port of the low-pressure section air suction electronic three-way valve 11 through a pipeline; the other pipeline of the low-pressure section air suction electronic three-way valve 11 and the high-pressure section CO 2 The compressor 4 is communicated, the last path of the low-pressure section air suction electronic three-way valve 11 is communicated with the air path of the gas-liquid separator 9, and the low-pressure section air suction electronic three-way valve 11 and the air path of the gas-liquid separator 9 pass through the regenerative cycle plate heat exchanger 6;
high pressure section CO 2 The output end of the compressor 4 is communicated with one path of the high-pressure section exhaust electronic three-way valve 3, the other path of the high-pressure section exhaust electronic three-way valve 3 is communicated with the heat recovery plate heat exchanger 5, an output pipeline of the heat recovery plate heat exchanger 5 is communicated with the regenerative cycle plate heat exchanger 6, and an output pipeline communicated with the regenerative cycle plate heat exchanger 6 is finally communicated with the inlet of the gas-liquid separator 9 through the evaporator and the desuperheater 8; the last path of the high-pressure section exhaust electronic three-way valve 3 is communicated with pipelines of the regenerative cycle plate heat exchanger 6 positioned at the front ends of the evaporator and the desuperheater 8, and the final path is gathered together and then passes through the evaporator and the desuperheater 8;
the high-pressure electronic pressure regulating valve 7 is arranged on a pipeline between the regenerative cycle plate heat exchanger 6 and the evaporator and between the regenerative cycle plate heat exchanger and the desuperheater 8;
the other output pipeline of the gas-liquid separator 9 is provided with a vapor-separating electronic pressure regulating valve 10 which is finally communicated with the gas path of the gas-liquid separator 9, and an electric ball valve 12 is arranged between the gas path outlet of the gas-liquid separator 9 and the communication position.
The CO at the low pressure section can be used practically 2 Compressor 1, exhaust check valve 2, high-pressure section exhaust electronic three-way valve 3, high-pressure section CO 2 The heat pump system comprises a compressor 4, a heat recovery plate heat exchanger 5, a regenerative cycle plate heat exchanger 6, a high-voltage electronic pressure regulating valve 7, an evaporator and a desuperheater 8, a gas-liquid separator 9, a vapor-separation electronic pressure regulating valve 10, a low-pressure section air suction electronic three-way valve 11, an electric ball valve 12 and a desuperheater one-way valve 13 which are integrated into a whole outdoor heat pump unit, wherein the unit is arranged outdoors, so that good heat dissipation of the condenser is ensured, and the system operates stably.
As shown in fig. 1, the evaporator and the desuperheater 8 are designed integrally, and simultaneously give pre-heat dissipation to the subcritical compressor and evaporation and absorption heat of the whole system, and the pre-heat dissipation can give heat compensation of evaporation and absorption heat, so that the maximum recycling of the heat source is realized.
As shown in fig. 1 and 2, the outdoor temperature change process is performed through a controller, the controller program can control an electronic three-way valve (a high-pressure section exhaust electronic three-way valve 3 and a low-pressure section suction electronic three-way valve 11) to realize the switching of heating cycle, the two-stage compression process is realized through the switching under the condition of low ring temperature, the one-stage compression process is realized under the condition of high ring temperature, the safe and reliable operation of the system can be ensured, and meanwhile, the high efficiency of the operation of the system is ensured.
As shown in FIG. 1, during high-temperature heating, CO is produced from a high-pressure section 2 The compressor uses CO 2 Refrigerant is compressed, refrigerant gas compressed into high temperature and high pressure enters the heat recovery plate heat exchanger through the high pressure section exhaust electronic three-way valve, and water is heated in the heat recovery plate heat exchanger and CO is simultaneously supplied to the heat recovery plate heat exchanger 2 The refrigerant is cooled to form a high-pressure transcritical refrigerant, the transcritical refrigerant is further cooled in a regenerative cycle plate heat exchanger, the refrigerant enters an evaporator after being throttled by a high-pressure electronic pressure regulating valve, the low-pressure refrigerant is evaporated and absorbs heat in the evaporator, the refrigerant after forming low-pressure gas refrigerant enters the regenerative cycle plate heat exchanger after passing through an electric ball valve, and the refrigerant after passing through the plate heat exchanger forms CO in a superheated state 2 And the overheated refrigerant returns to the high-pressure section compressor after passing through the low-pressure section air suction electronic three-way valve, so as to complete the heating cycle. In the operation process of the compressor, the vapor separation electronic pressure regulating valve is opened, so that the oil in the vapor can return to the compressor along with the refrigerant.
As shown in FIG. 2, during low-temperature heating, the low-pressure section CO 2 The compressor uses CO 2 Refrigerant is compressed, and compressed into refrigerant gas with high temperature and medium pressure to enter an evaporator&Desuperheater in evaporator&CO feed to desuperheater 2 The refrigerant is cooled to form medium-pressure refrigerant, and the medium-pressure refrigerant enters the high-pressure section CO 2 The compressor continues to compress, the refrigerant gas compressed into high temperature and high pressure enters the heat recovery plate heat exchanger, and water is heated in the heat recovery plate heat exchanger and CO is fed at the same time 2 The refrigerant is cooled to form a high-pressure transcritical stateThe state refrigerant, the transcritical refrigerant is cooled further in the regenerative cycle plate heat exchanger, enters the evaporator after being throttled by the high-pressure electronic pressure regulating valve, the low-pressure refrigerant is evaporated and absorbs heat in the evaporator, the low-pressure gas refrigerant is formed and enters the regenerative cycle plate heat exchanger after passing through the electric ball valve, and the superheated state CO is formed after passing through the plate heat exchanger 2 And the overheated refrigerant returns to the low-pressure section compressor after passing through the low-pressure section air suction electronic three-way valve, so as to complete the heating cycle. In the operation process of the compressor, the vapor separation electronic pressure regulating valve is opened, so that the oil in the vapor can return to the compressor along with the refrigerant.
As shown in FIG. 3, during defrosting, the high-pressure section CO 2 The compressor uses CO 2 The refrigerant is compressed, the refrigerant gas compressed into high temperature and high pressure enters the evaporator after passing through the high pressure section exhaust electronic three-way valve, the high temperature gas is used for defrosting of the evaporator, the high pressure refrigerant after defrosting enters the regenerative cycle plate heat exchanger after being throttled and depressurized by the vapor separation electronic pressure regulating valve, and the high pressure refrigerant returns to the high pressure section compressor after absorbing part of heat through the low pressure section suction electronic three-way valve, so that defrosting cycle is completed.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (1)
1. Wide-ring temperature type CO 2 An air source heat pump system, comprising:
low pressure stage CO 2 Compressor (1), exhaust check valve (2), high-pressure section exhaust electronic three-way valve (3), high-pressure section CO 2 Compressor (4), heat recovery plate heat exchanger (5), regenerative cycle plate heat exchanger (6), high-pressure electronic pressure regulating valve (7), evaporationThe device comprises a superheater (8), a gas-liquid separator (9), a vapor separation electronic pressure regulating valve (10), a low-pressure section air suction electronic three-way valve (11), an electric ball valve (12) and a superheater check valve (13);
the low pressure section CO 2 One end of the compressor (1) is connected with the high-pressure section CO through a pipeline with an exhaust one-way valve (2) by an evaporator and a desuperheater (8) 2 An air inlet pipeline of the compressor (4) is communicated, and a superheater removing check valve (13) is arranged at the outlet positions of the evaporator and the superheater removing device (8);
the other end is communicated with one port of the low-pressure section air suction electronic three-way valve (11) through a pipeline; the other pipeline of the low-pressure section air suction electronic three-way valve (11) and the high-pressure section CO 2 The compressor (4) is communicated, the last path of the low-pressure section air suction electronic three-way valve (11) is communicated with the air path of the gas-liquid separator (9), and the low-pressure section air suction electronic three-way valve (11) and the air path of the gas-liquid separator (9) pass through the regenerative cycle plate heat exchanger (6);
high pressure section CO 2 The output end of the compressor (4) is communicated with one path of the high-pressure section exhaust electronic three-way valve (3), the other path of the high-pressure section exhaust electronic three-way valve (3) is communicated with the heat recovery plate type heat exchanger (5), an output pipeline of the heat recovery plate type heat exchanger (5) is communicated with the regenerative cycle plate type heat exchanger (6), and an output pipeline communicated with the regenerative cycle plate type heat exchanger (6) is finally communicated with the inlet of the gas-liquid separator (9) through the evaporator and the desuperheater (8); the last path of the high-pressure section exhaust electronic three-way valve (3) is communicated with pipelines of the regenerative cycle plate heat exchanger (6) positioned at the front ends of the evaporator and the desuperheater (8), and the final path is gathered together and then passes through the evaporator and the desuperheater (8);
the high-pressure electronic pressure regulating valve (7) is arranged on a pipeline between the regenerative cycle plate heat exchanger (6) and the evaporator and the desuperheater (8);
the other output pipeline of the gas-liquid separator (9) is provided with a vapor-separating electronic pressure regulating valve (10), and is finally communicated with the gas path of the gas-liquid separator (9), and an electric ball valve (12) is arranged between the gas path outlet of the gas-liquid separator (9) and the communication position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911405335.0A CN111306827B (en) | 2019-12-30 | 2019-12-30 | Wide-ring temperature type CO 2 Air source heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911405335.0A CN111306827B (en) | 2019-12-30 | 2019-12-30 | Wide-ring temperature type CO 2 Air source heat pump system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111306827A CN111306827A (en) | 2020-06-19 |
| CN111306827B true CN111306827B (en) | 2023-08-29 |
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| EP2551612A2 (en) * | 2011-07-29 | 2013-01-30 | Mitsubishi Heavy Industries | Supercritical-cycle heat pump |
| CN104075477A (en) * | 2014-06-18 | 2014-10-01 | 广东芬尼克兹节能设备有限公司 | Cascade high-temperature heat pump |
| CN106642786A (en) * | 2016-11-24 | 2017-05-10 | 松下冷机系统（大连）有限公司 | Carbon dioxide refrigerating cycle system adopting intermediate pressure for supplying liquid |
| WO2019128278A1 (en) * | 2017-12-27 | 2019-07-04 | 青岛海尔空调电子有限公司 | Air conditioner system |
| CN211345914U (en) * | 2019-12-30 | 2020-08-25 | 松下冷机系统（大连）有限公司 | Wide-ring-temperature CO2 air source heat pump system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3023713A1 (en) * | 2014-11-19 | 2016-05-25 | Danfoss A/S | A method for controlling a vapour compression system with an ejector |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2551612A2 (en) * | 2011-07-29 | 2013-01-30 | Mitsubishi Heavy Industries | Supercritical-cycle heat pump |
| CN104075477A (en) * | 2014-06-18 | 2014-10-01 | 广东芬尼克兹节能设备有限公司 | Cascade high-temperature heat pump |
| CN106642786A (en) * | 2016-11-24 | 2017-05-10 | 松下冷机系统（大连）有限公司 | Carbon dioxide refrigerating cycle system adopting intermediate pressure for supplying liquid |
| WO2019128278A1 (en) * | 2017-12-27 | 2019-07-04 | 青岛海尔空调电子有限公司 | Air conditioner system |
| CN211345914U (en) * | 2019-12-30 | 2020-08-25 | 松下冷机系统（大连）有限公司 | Wide-ring-temperature CO2 air source heat pump system |
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Address after: 116600 No. 8 Songlan Street, Dalian Economic and Technological Development Zone, Liaoning Province Applicant after: Bingshan Songyang Refrigerator System (Dalian) Co.,Ltd. Address before: 116000 No.8 Songlan street, Jinzhou new district, Dalian City, Liaoning Province Applicant before: PANASONIC REFRIGERATOR SYSTEM (DALIAN) CO.,LTD. |
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Effective date of registration: 20230530 Address after: No. 106 Liaohe East Road, Dalian Economic and Technological Development Zone, Liaoning Province, 116600 Applicant after: Iceberg cold and hot technology Co.,Ltd. Address before: 116600 No. 8 Songlan Street, Dalian Economic and Technological Development Zone, Liaoning Province Applicant before: Bingshan Songyang Refrigerator System (Dalian) Co.,Ltd. |
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