CN108375235B - Air source heat pump system and control method - Google Patents
Air source heat pump system and control method Download PDFInfo
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- CN108375235B CN108375235B CN201810074799.7A CN201810074799A CN108375235B CN 108375235 B CN108375235 B CN 108375235B CN 201810074799 A CN201810074799 A CN 201810074799A CN 108375235 B CN108375235 B CN 108375235B
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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
- F25B13/00—Compression machines, plants or systems, with reversible 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/02—Subcoolers
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/008—Refrigerant heaters
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/021—Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/031—Sensor arrangements
- F25B2313/0315—Temperature sensors near the outdoor heat exchanger
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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)
- Central Heating Systems (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides an air source heat pump system and a control method, wherein the air source heat pump system comprises a compressor, a condenser, a first gas-liquid separator, an evaporation condenser, an evaporator and a heat accumulating type waste heat recovery device which are sequentially communicated to form a heat exchange cycle, a non-azeotropic mixed working medium is arranged in the heat exchange cycle, and the heat accumulating type waste heat recovery device is arranged on the compressor. According to the air source heat pump system and the control method, the four-way valve is not used, the problems of low system reliability caused by reversing noise of the four-way valve and frequent reversing of the four-way valve are solved, the exhaust gas of the compressor can be guaranteed to provide heat for the condenser all the time, continuous heating is guaranteed, the heat of the compressor and the exhaust gas of the compressor can be effectively recovered through the heat accumulating type waste heat recovery device, and when the system is in a defrosting mode, the liquid non-azeotropic working medium is heated, normal heat exchange circulation of the system is guaranteed, and the energy utilization rate is improved.
Description
Technical Field
The invention relates to the technical field of air treatment equipment, in particular to an air source heat pump system and a control method.
Background
At present, a self-overlapping air source heat pump is adopted in a high-temperature difference medium-temperature heat pump with the heat supply temperature of more than 85 ℃, the self-overlapping air source heat pump is a heat pump system adopting a non-azeotropic mixed working medium, a single compressor is used, and the non-azeotropic mixed working medium is subjected to one or more times of gas-liquid separation in a cycle after being compressed, so that mixed refrigerants with more than two components in the whole cycle flow and transfer energy simultaneously, and self-overlapping is realized between high-boiling components and low-boiling components, thereby achieving the aim of preparing high-temperature hot water (more than 65 ℃), and achieving even unreachable high temperature only by two-stage compression or overlapping heat pumps in the conventional heat pump cycle. However, the self-overlapping air source heat pump has the defects that the evaporator frosts seriously when the low-temperature high-humidity heating is performed, the heating effect is relatively poor when the evaporator frosts relatively thick, reverse circulation defrosting is adopted in the prior art, the four-way valve is utilized to change the direction of the exhaust gas of the compressor, the four-way valve is utilized to change the direction, the noise is large, the reliability of the system is reduced, and the heat is required to be absorbed from the hot water side during defrosting, so that the comfort of a user is reduced.
Disclosure of Invention
In order to solve the technical problems, an air source heat pump system and a control method for ensuring continuous heating during defrosting are provided.
The utility model provides an air source heat pump system, includes heat accumulation formula waste heat recovery device and communicates in proper order and form heat transfer cycle's compressor, condenser, first vapour and liquid separator, evaporative condenser and evaporimeter, be provided with non-azeotropic mixture working medium in the heat transfer cycle, heat accumulation formula waste heat recovery device set up in the compressor and/or on the blast pipe of compressor, just non-azeotropic mixture working medium can pass through after the heat accumulation formula waste heat recovery device heats the backward flow to the compressor.
The exhaust port of the compressor is positioned in the heat accumulating type waste heat recovery device, and the exhaust pipeline of the compressor penetrates through the heat accumulating type waste heat recovery device and then is communicated with the condenser.
One end of the condenser is communicated with the exhaust port of the compressor, the other end of the condenser is communicated with the inlet of the first gas-liquid separator, the gaseous outlet of the first gas-liquid separator is respectively communicated with the high-temperature fluid inlet of the evaporation condenser and the inlet of the evaporator, the liquid outlet is communicated with the low-temperature fluid inlet of the evaporation condenser through a first throttling device, the high-temperature fluid outlet of the evaporation condenser is communicated with the inlet of the evaporator through a second throttling device, and the low-temperature fluid outlet of the evaporation condenser and the outlet of the evaporator are communicated with the air inlet of the compressor after converging at a first node.
The air source heat pump system further comprises a waste heat heating pipeline, a third electromagnetic valve is arranged between the first node and the compressor, the waste heat heating pipeline is arranged at two ends of the third electromagnetic valve in parallel, and part of the waste heat heating pipeline is arranged in the heat accumulating type waste heat recovery device.
The waste heat heating pipeline is provided with a fourth electromagnetic valve, and the fourth electromagnetic valve controls the on-off of the waste heat heating pipeline.
A first electromagnetic valve is arranged between the gaseous outlet of the gas-liquid separator and the inlet of the evaporator.
The outlet of the evaporator is communicated with the first node through a third throttling device and a second electromagnetic valve which are arranged in parallel respectively.
The air source heat pump system further comprises a second gas-liquid separator, wherein the inlet of the second gas-liquid separator is communicated with the first node, and the gaseous outlet of the second gas-liquid separator is communicated with the exhaust port of the compressor.
The evaporator is provided with a defrosting temperature sensing bag.
One end of the condenser is communicated with the exhaust port of the compressor, the other end of the condenser is communicated with the inlet of the first gas-liquid separator, the gaseous outlet of the first gas-liquid separator is respectively communicated with the high-temperature fluid inlet of the evaporation condenser and the inlet of the evaporator, the liquid outlet of the first gas-liquid separator is communicated with the low-temperature fluid inlet of the evaporation condenser through a first throttling device, the high-temperature fluid outlet of the evaporation condenser is communicated with the inlet of the evaporator through a second throttling device, and the low-temperature fluid outlet of the evaporation condenser and the outlet of the evaporator are communicated with the air inlet of the compressor after being converged at a first node;
the air source heat pump system further comprises a waste heat heating pipeline, a third electromagnetic valve is arranged between the first node and the compressor, the waste heat heating pipeline and the third electromagnetic valve are arranged in parallel, and part of the waste heat heating pipeline is arranged in the heat accumulating type waste heat recovery device;
a fourth electromagnetic valve is arranged on the waste heat heating pipeline and used for controlling the on-off of the waste heat heating pipeline;
a first electromagnetic valve is arranged between the gaseous outlet of the gas-liquid separator and the inlet of the evaporator;
the outlet of the evaporator is communicated with the first node through a third throttling device and a second electromagnetic valve which are arranged in parallel respectively;
the air source heat pump system further comprises a second gas-liquid separator, wherein the inlet of the second gas-liquid separator is communicated with the first node, and the gaseous outlet of the second gas-liquid separator is communicated with the exhaust port of the compressor.
The control method of the air source heat pump system comprises the following steps:
in the heating mode, the first electromagnetic valve, the fourth electromagnetic valve and the second throttling device are closed, the second electromagnetic valve, the third electromagnetic valve, the first throttling device and the third throttling device are opened, and the non-azeotropic mixed working medium sequentially passes through the compressor, the condenser, the gas-liquid separator, the evaporative condenser and the evaporator and then flows back to the compressor.
In the heating defrosting mode, the second electromagnetic valve, the third electromagnetic valve and the second throttling device are closed, the first electromagnetic valve, the fourth electromagnetic valve, the first throttling device and the third throttling device are opened, and the non-azeotropic mixed working medium sequentially passes through the compressor, the condenser, the gas-liquid separator, the evaporative condenser, the evaporator and the heat accumulating type waste heat recovery device and then flows back to the compressor.
If the temperature of the defrosting temperature sensing bag is lower than the set temperature, the air source heat pump system is switched from a heating mode to a heating defrosting mode;
and if the temperature of the defrosting temperature sensing bag is higher than the set temperature, the air source heat pump system is switched from a heating defrosting mode to a heating mode.
According to the air source heat pump system and the control method, the four-way valve is not used, the problems of low system reliability caused by reversing noise of the four-way valve and frequent reversing of the four-way valve are solved, the exhaust gas of the compressor can be guaranteed to provide heat for the condenser all the time, continuous heating is guaranteed, the heat of the compressor and the exhaust gas of the compressor can be effectively recovered through the heat accumulating type waste heat recovery device, and when the system is in a defrosting mode, the liquid non-azeotropic working medium is heated, normal heat exchange circulation of the system is guaranteed, and the energy utilization rate is improved.
Drawings
FIG. 1 is a schematic diagram of an air source heat pump system and a control method thereof according to the present invention;
in the figure:
1. a compressor; 2. a condenser; 3. a first gas-liquid separator; 4. an evaporative condenser; 5. an evaporator; 6. a heat accumulating type waste heat recovery device; 7. a waste heat heating pipeline; 8. a third electromagnetic valve; 9. a fourth electromagnetic valve; 10. a first electromagnetic valve; 11. a third throttling device; 12. a second electromagnetic valve; 13. a second gas-liquid separator; 14. a first throttle device; 15. and a second throttling device.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The air source heat pump system shown in fig. 1 comprises a heat accumulating type waste heat recovery device 6, and a compressor 1, a condenser 2, a first gas-liquid separator 3, an evaporation condenser 4 and an evaporator 5 which are sequentially communicated to form a heat exchange cycle, wherein a non-azeotropic mixed working medium is arranged in the heat exchange cycle, the heat accumulating type waste heat recovery device 6 is arranged on the compressor 1 and/or an exhaust pipe of the compressor 1, the non-azeotropic mixed working medium can flow back to the compressor 1 after being heated by the heat accumulating type waste heat recovery device 6, the heat accumulating type waste heat recovery device 6 can recover waste heat of the compressor 1 and exhaust gas thereof, the recovered waste heat is utilized to heat the non-azeotropic mixed working medium in a defrosting process of the system, the liquid non-azeotropic mixed working medium after the defrosting process of the evaporator 5 is ensured to have enough heat for evaporation, and the energy utilization rate is improved.
The exhaust port of the compressor 1 is located in the heat accumulating type waste heat recovery device 6, and an exhaust pipeline of the compressor 1 penetrates through the heat accumulating type waste heat recovery device 6 and then is communicated with the condenser 2, so that the heat of the compressor 1 and the exhaust gas can be recovered as much as possible by implementing the heat accumulating type waste heat recovery device 6.
One end of the condenser 2 is communicated with the exhaust port of the compressor 1, the other end is communicated with the inlet of the first gas-liquid separator 3, the gaseous outlet of the first gas-liquid separator 3 is respectively communicated with the high-temperature fluid inlet of the evaporation condenser 4 and the inlet of the evaporator 5, the liquid outlet is communicated with the low-temperature fluid inlet of the evaporation condenser 4 through a first throttling device 14, the high-temperature fluid outlet of the evaporation condenser 4 is communicated with the inlet of the evaporator 5 through a second throttling device 15, the low-temperature fluid outlet of the evaporation condenser 4 and the outlet of the evaporator 5 are converged at a first node and then are communicated with the air inlet of the compressor 1, the exhaust gas of the compressor 1 is subjected to heat release in the condenser 2 to prepare hot water or hot air, a large amount of working medium of high-boiling components and a small amount of working medium of low-boiling components are condensed into liquid, a large amount of working medium of low-boiling components and a small amount of working medium of high-boiling components are still kept in a gaseous state, after the gaseous state and liquid enter the first gas-liquid separator 3, a mixed liquid in the gaseous state is mixed liquid enters the first gas-liquid separator 3 through the first throttling device 4, the first refrigerant 4 is required to enter the first heat-absorbing device 5 through the first throttling device 5, the mixed liquid in the first throttling device 4 is required to enter the first evaporator 5, the mixed liquid-state is directly enters the evaporator 4 through the evaporator 5, and the first throttling device 4 is subjected to heat-absorbing device 4, and then enters the mixed liquid-state 1 through the evaporator 4, and the first throttling device 4 is subjected to heat-absorbing device 1, and the heat-absorbing device is directly enters the heat-absorbing device, the mixed working medium passing through the evaporator 5 and the mixed working medium discharged from the low-temperature fluid outlet of the evaporative condenser 4 are mixed at a first node and then returned to the compressor 1 to form a cycle.
The air source heat pump system further comprises a waste heat heating pipeline 7, a third electromagnetic valve 8 is arranged between the first node and the compressor 1, the waste heat heating pipeline 7 is arranged at two ends of the third electromagnetic valve 8 in parallel, and part of the waste heat heating pipeline 7 is arranged in the heat accumulating type waste heat recovery device 6, when the mixed working medium passing through the first node needs to be heated, the third electromagnetic valve 8 is closed, the mixed working medium passes through the waste heat heating pipeline 7, and after being heated in the heat accumulating type waste heat recovery device 6, the mixed working medium flows back into the compressor 1, so that the mixed working medium entering the compressor 1 can be evaporated.
The waste heat heating pipeline 7 is provided with a fourth electromagnetic valve 9, the fourth electromagnetic valve 9 controls the on-off of the waste heat heating pipeline 7, the fourth electromagnetic valve 9 is in a closed state under the condition that normal heating or mixed working medium heating is not needed, the heat accumulating type waste heat recovery device 6 performs heat recovery, and when the fourth electromagnetic valve 9 is opened, the heat accumulating type waste heat recovery device 6 is in a heat release state of the mixed working medium.
A first electromagnetic valve 10 is arranged between the gaseous outlet of the first gas-liquid separator 3 and the inlet of the evaporator 5, so that the gaseous outlet of the gas-liquid separator can be directly communicated with the evaporator 5 according to the requirement.
The outlet of the evaporator 5 is respectively communicated with the first node through a third throttling device 11 and a second electromagnetic valve 12 which are arranged in parallel, and the mixed working fluid passing through the evaporator 5 can be reduced under the throttling action of the third throttling device 11 and also can directly pass through the second electromagnetic valve 12.
The air source heat pump system further comprises a second gas-liquid separator 13, wherein an inlet of the second gas-liquid separator 13 is communicated with the first node, and a gaseous outlet of the second gas-liquid separator 13 is communicated with an exhaust port of the compressor 1.
The evaporator 5 is provided with a defrosting temperature sensing bulb, and whether the evaporator 5 of the air source heat pump system needs to be defrosted is detected by using the defrosting temperature sensing bulb.
One end of the condenser 2 is communicated with the exhaust port of the compressor 1, the other end of the condenser is communicated with the inlet of the first gas-liquid separator 3, the gaseous outlet of the first gas-liquid separator 3 is respectively communicated with the high-temperature fluid inlet of the evaporation condenser 4 and the inlet of the evaporator 5, the liquid outlet of the first gas-liquid separator 3 is communicated with the low-temperature fluid inlet of the evaporation condenser 4 through a first throttling device 14, the high-temperature fluid outlet of the evaporation condenser 4 is communicated with the inlet of the evaporator 5 through a second throttling device 15, and the low-temperature fluid outlet of the evaporation condenser 4 and the outlet of the evaporator 5 are communicated with the air inlet of the compressor 1 after being converged at a first node; the air source heat pump system further comprises a waste heat heating pipeline 7, a third electromagnetic valve 8 is arranged between the first node and the compressor 1, the waste heat heating pipeline 7 and the third electromagnetic valve 8 are arranged in parallel, and part of the waste heat heating pipeline 7 is arranged in the heat accumulating type waste heat recovery device 6; a fourth electromagnetic valve 9 is arranged on the waste heat heating pipeline 7, and the fourth electromagnetic valve 9 controls the on-off of the waste heat heating pipeline 7; a first electromagnetic valve 10 is arranged between the gaseous outlet of the gas-liquid separator and the inlet of the evaporator 5; the outlet of the evaporator 5 is communicated with the first node through a third throttling device 11 and a second electromagnetic valve 12 which are arranged in parallel respectively; the air source heat pump system further comprises a second gas-liquid separator 13, wherein an inlet of the second gas-liquid separator 13 is communicated with the first node, and a gaseous outlet of the second gas-liquid separator 13 is communicated with an exhaust port of the compressor 1.
The control method of the air source heat pump system comprises the following steps:
in the heating mode, the first electromagnetic valve 10, the fourth electromagnetic valve 9 and the second throttling device 15 are closed, the second electromagnetic valve 12, the third electromagnetic valve 8, the first throttling device 14 and the third throttling device 11 are opened, and the non-azeotropic mixed working medium sequentially passes through the compressor 1, the condenser 2, the gas-liquid separator, the evaporative condenser 4 and the evaporator 5 and then flows back to the compressor 1.
In the heating defrosting mode, the second electromagnetic valve 12, the third electromagnetic valve 8 and the second throttling device 15 are closed, the first electromagnetic valve 10, the fourth electromagnetic valve 9, the first throttling device 14 and the third throttling device 11 are opened, and the non-azeotropic mixed working medium sequentially passes through the compressor 1, the condenser 2, the gas-liquid separator, the evaporation condenser 4, the evaporator 5 and the heat accumulating type waste heat recovery device 6 and then flows back to the compressor 1.
If the temperature of the defrosting temperature sensing bag is lower than the set temperature, the air source heat pump system is switched from a heating mode to a heating defrosting mode;
and if the temperature of the defrosting temperature sensing bag is higher than the set temperature, the air source heat pump system is switched from a heating defrosting mode to a heating mode.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. An air source heat pump system, characterized in that: the heat-accumulating type waste heat recovery device (6) is arranged on the compressor (1) and/or an exhaust pipe of the compressor (1), and the non-azeotropic mixed medium can flow back to the compressor (1) after being heated by the heat-accumulating type waste heat recovery device (6); one end of the condenser (2) is communicated with an exhaust port of the compressor (1), the other end of the condenser is communicated with an inlet of the first gas-liquid separator (3), a gaseous outlet of the first gas-liquid separator (3) is respectively communicated with a high-temperature fluid inlet of the evaporation condenser (4) and an inlet of the evaporator (5), a liquid outlet of the first gas-liquid separator (3) is communicated with a low-temperature fluid inlet of the evaporation condenser (4) through a first throttling device (14), a high-temperature fluid outlet of the evaporation condenser (4) is communicated with the inlet of the evaporator (5) through a second throttling device (15), and a low-temperature fluid outlet of the evaporation condenser (4) and an outlet of the evaporator (5) are communicated with an air inlet of the compressor (1) after converging at a first node; the outlet of the evaporator (5) is communicated with the first node through a third throttling device (11) and a second electromagnetic valve (12) which are arranged in parallel respectively; a first electromagnetic valve (10) is arranged between the gaseous outlet of the gas-liquid separator and the inlet of the evaporator (5).
2. An air source heat pump system according to claim 1, wherein: the exhaust port of the compressor (1) is positioned in the heat accumulating type waste heat recovery device (6), and an exhaust pipeline of the compressor (1) is arranged to be communicated with the condenser (2) after passing through the heat accumulating type waste heat recovery device (6).
3. An air source heat pump system according to claim 1, wherein: the air source heat pump system further comprises a waste heat heating pipeline (7), a third electromagnetic valve (8) is arranged between the first node and the compressor (1), the waste heat heating pipeline (7) and the third electromagnetic valve (8) are arranged in parallel, and part of the waste heat heating pipeline (7) is arranged in the heat accumulating type waste heat recovery device (6).
4. An air source heat pump system according to claim 3, wherein: the waste heat heating pipeline (7) is provided with a fourth electromagnetic valve (9), and the fourth electromagnetic valve (9) controls the on-off of the waste heat heating pipeline (7).
5. An air source heat pump system according to claim 1, wherein: the air source heat pump system further comprises a second gas-liquid separator (13), wherein an inlet of the second gas-liquid separator (13) is communicated with the first node, and a gaseous outlet of the second gas-liquid separator (13) is communicated with an exhaust port of the compressor (1).
6. An air source heat pump system according to claim 1, wherein: one end of the condenser (2) is communicated with an exhaust port of the compressor (1), the other end of the condenser is communicated with an inlet of the first gas-liquid separator (3), a gaseous outlet of the first gas-liquid separator (3) is respectively communicated with a high-temperature fluid inlet of the evaporation condenser (4) and an inlet of the evaporator (5), a liquid outlet of the first gas-liquid separator (3) is communicated with a low-temperature fluid inlet of the evaporation condenser (4) through a first throttling device (14), a high-temperature fluid outlet of the evaporation condenser (4) is communicated with the inlet of the evaporator (5) through a second throttling device (15), and a low-temperature fluid outlet of the evaporation condenser (4) and an outlet of the evaporator (5) are communicated with an air inlet of the compressor (1) after converging at a first node;
the air source heat pump system further comprises a waste heat heating pipeline (7), a third electromagnetic valve (8) is arranged between the first node and the compressor (1), the waste heat heating pipeline (7) and the third electromagnetic valve (8) are arranged in parallel, and part of the waste heat heating pipeline (7) is arranged in the heat accumulating type waste heat recovery device (6);
a fourth electromagnetic valve (9) is arranged on the waste heat heating pipeline (7), and the fourth electromagnetic valve (9) controls the on-off of the waste heat heating pipeline (7);
a first electromagnetic valve (10) is arranged between the gaseous outlet of the gas-liquid separator and the inlet of the evaporator (5);
the outlet of the evaporator (5) is communicated with the first node through a third throttling device (11) and a second electromagnetic valve (12) which are arranged in parallel respectively;
the air source heat pump system further comprises a second gas-liquid separator (13), wherein an inlet of the second gas-liquid separator (13) is communicated with the first node, and a gaseous outlet of the second gas-liquid separator (13) is communicated with an exhaust port of the compressor (1).
7. An air source heat pump system according to claim 1, wherein: the evaporator (5) is provided with a defrosting temperature sensing bulb.
8. A control method of the air source heat pump system according to any one of claims 1 to 7, characterized by: comprising the following steps:
in a heating mode, a first electromagnetic valve (10), a fourth electromagnetic valve (9) and a second throttling device (15) are closed, a second electromagnetic valve (12), a third electromagnetic valve (8), a first throttling device (14) and a third throttling device (11) are opened, and a zeotropic mixed working medium sequentially flows back to the compressor (1) after passing through the compressor (1), the condenser (2), the gas-liquid separator, the evaporative condenser (4) and the evaporator (5);
in a heating defrosting mode, the second electromagnetic valve (12), the third electromagnetic valve (8) and the second throttling device (15) are closed, the first electromagnetic valve (10), the fourth electromagnetic valve (9), the first throttling device (14) and the third throttling device (11) are opened, and the zeotropic mixed working medium sequentially flows back to the compressor (1) after passing through the compressor (1), the condenser (2), the gas-liquid separator, the evaporative condenser (4), the evaporator (5) and the heat accumulating type waste heat recovery device (6).
9. The control method according to claim 8, characterized in that: a defrosting temperature sensing bulb is arranged on the evaporator (5), and if the temperature of the defrosting temperature sensing bulb is lower than a set temperature, the air source heat pump system is switched from a heating mode to a heating defrosting mode;
and if the temperature of the defrosting temperature sensing bag is higher than the set temperature, the air source heat pump system is switched from a heating defrosting mode to a heating mode.
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| CN201810074799.7A CN108375235B (en) | 2018-01-25 | 2018-01-25 | Air source heat pump system and control method |
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| CN201810074799.7A CN108375235B (en) | 2018-01-25 | 2018-01-25 | Air source heat pump system and control method |
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| CN108375235B true CN108375235B (en) | 2023-08-15 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112594956A (en) * | 2020-12-16 | 2021-04-02 | 浙江中广电器股份有限公司 | Control system for reducing liquid return risk, air conditioner and operation method |
| CN113446754B (en) * | 2021-06-14 | 2022-05-20 | 浙江国祥股份有限公司 | Double-cold-source air source heat pump unit with total heat recovery |
| CN113639490B (en) * | 2021-07-01 | 2023-04-07 | 广东芬尼克兹节能设备有限公司 | Gas-liquid separation system |
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| CN108375235A (en) | 2018-08-07 |
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