CN112984855A - Heat pump air conditioning system and control logic - Google Patents
Heat pump air conditioning system and control logic Download PDFInfo
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- CN112984855A CN112984855A CN202110348826.7A CN202110348826A CN112984855A CN 112984855 A CN112984855 A CN 112984855A CN 202110348826 A CN202110348826 A CN 202110348826A CN 112984855 A CN112984855 A CN 112984855A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000001816 cooling Methods 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000010257 thawing Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 95
- 238000005507 spraying Methods 0.000 claims description 53
- 239000003507 refrigerant Substances 0.000 claims description 30
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 238000005057 refrigeration Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 10
- 238000004781 supercooling Methods 0.000 claims description 5
- 230000008676 import Effects 0.000 claims 3
- 238000009827 uniform distribution Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 230000005494 condensation Effects 0.000 description 5
- 238000009833 condensation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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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
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/10—Removing frost by spraying with fluid
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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)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a heat pump air conditioning system which can stably and efficiently operate under any working condition. When the environmental temperature is low, a small part of hot water prepared by the system is sprayed to the surface of the air-cooled heat exchanger to dissolve and defrost the frost layer on the surface of the heat exchanger, so that the heating capacity of the system is improved; when the environmental temperature is very high, a small part of cold water prepared by the system is utilized to carry out auxiliary cooling on the air-cooled heat exchanger, the condensing temperature of the system is reduced, the operation reliability and the operation efficiency of the system are further improved, the defrosting effect and the heating effect of the air-cooled heat exchanger under various low-temperature working conditions are fully guaranteed, meanwhile, the refrigerating effect under the high-temperature working condition can be improved, the annual operation efficiency of the system can be comprehensively improved, the heating effect of the cold system is improved, the operation comfort level is improved, and other multiple targets are achieved.
Description
Technical Field
The invention relates to the technical field of heat pump air conditioners, and particularly provides a heat pump air conditioner system and control logic.
Background
At present, basically, there is no heating equipment in a region in south China, so heating by a heat pump becomes a high-efficiency energy-saving preferred equipment, but when the temperature is lower than 5 ℃ in winter, the heating efficiency is greatly reduced, especially in low-temperature winter and rain weather in south, the indoor environment needs heating supply, and the outdoor unit is very easy to frost, the heating capacity of the equipment is greatly reduced, dissatisfaction and complaint of users are easily caused, therefore, how to improve the heating capacity under low-temperature working conditions on the premise of not increasing the complexity of the existing equipment and the production cost becomes the key research point of each production enterprise, and the existing solving method mainly comprises the following steps: firstly, two-stage compression is adopted; and secondly, frequent defrosting is performed, wherein the difficulty and cost of a train system are greatly increased by two-stage compression, the comfort level of an indoor environment is difficult to ensure by frequent defrosting, and the user experience is reduced, so that a new technical means is required to perform efficient defrosting in low-temperature winter and rain weather.
Therefore, there is a need in the art for a new heat pump air conditioning system and control logic to address the above problems.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a heat pump air conditioning system that can stably and efficiently operate under any operating conditions.
In order to achieve the above object, the present invention provides a heat pump air conditioning system comprising: the system comprises a compressor, a high-pressure exhaust pipe, an oil-gas separator, an air-cooled heat exchanger gas collecting pipe, an air-cooled heat exchanger pipeline distributor, a high-pressure liquid pipe, an electronic expansion valve for enhanced vapor injection, a plate-type supercooling heat exchanger, an electronic expansion valve for a water-cooled heat exchanger, a four-way valve, a low-pressure gas-liquid separator, an oil return electromagnetic valve, a direct oil return capillary pipe and a forced oil return capillary pipe, wherein the four-way valve is provided with a four-way valve high-.
Further, still include: liquid ejection assisting device, the liquid ejection assisting device includes: the air-cooled heat exchanger comprises an emptying pipeline, an emptying electromagnetic valve, a liquid spraying electromagnetic valve, a water-cooled heat exchanger water outlet pipe, a water-cooled heat exchanger water return pipe, a liquid spraying inlet pipe, a liquid spraying connecting pipe, a water-cooled heat exchanger refrigerant inlet pipe, a water-cooled heat exchanger refrigerant outlet pipe, a liquid spraying outlet device, a fan and a liquid spraying opening of the liquid spraying outlet device, wherein the liquid spraying inlet pipe is connected with the water-cooled heat exchanger water outlet pipe, and the liquid spraying outlet device is arranged at the.
Furthermore, the liquid spraying openings of the liquid spraying outlet device are in a hole-shaped structure and are uniformly distributed in a circular shape, and the diameter range of the liquid spraying device is 5-15 mm.
In another aspect, the present invention further provides a heat pump air conditioning system control logic, where the control logic includes: the control logic comprises a refrigeration operation control logic, a heating operation control logic, an auxiliary liquid spraying defrosting control logic and an auxiliary liquid spraying enhanced refrigeration control logic.
Further, the cooling operation control logic specifically includes: when the air conditioning system executes a common refrigeration operation program, required cold water is provided according to system load, the water outlet temperature of the water-cooling heat exchanger is generally a first temperature value, the return water temperature is generally a second temperature value, and meanwhile, the liquid spraying electromagnetic valve is closed.
Further, the heating operation control logic specifically includes: when the air conditioning system executes a common heating operation program, required hot water is provided according to system load, the water outlet temperature of the water-cooling heat exchanger is generally a third temperature value, the water return temperature is generally a fourth temperature value, and meanwhile, the liquid spraying electromagnetic valve is closed.
Further, the auxiliary liquid spraying defrosting control logic specifically comprises: when the air conditioning system is in heating operation, the temperature detection unit detects the external environment temperature, when the environment temperature is lower than 5 ℃, the environment relative humidity is higher than 75%, the wall temperature of the refrigerant outlet pipe of the water-cooling heat exchanger is lower than 0 ℃, the liquid spraying electromagnetic valve is opened, the emptying electromagnetic valve is closed, after defrosting is finished, the liquid spraying electromagnetic valve is closed, the emptying electromagnetic valve is opened, the delay relay starts to work, after 30 minutes of delay, the temperature detection unit detects the external environment temperature, the environment relative humidity and the temperature of the refrigerant outlet pipe of the water-cooling heat exchanger again, when the environment temperature is lower than 5 ℃, the environment relative humidity is higher than 75%, the temperature of the refrigerant outlet pipe of the water-cooling heat exchanger.
Further, the auxiliary liquid spray enhanced refrigeration control logic specifically comprises: when the air conditioning system is in a refrigerating operation period, the temperature detection unit detects the external environment temperature, when the environment temperature is higher than 42 ℃, the wall temperature of the refrigerant outlet pipe of the water-cooling heat exchanger is higher than 35 ℃, the liquid injection electromagnetic valve is opened, the emptying electromagnetic valve is closed, when the wall temperature of the refrigerant outlet pipe of the water-cooling heat exchanger is less than or equal to 32 ℃, the liquid injection electromagnetic valve is closed, and the system is in a conventional refrigerating operation mode.
Further, the first temperature value is a temperature value within a range of 5-7 ℃, and the second temperature value is a temperature value within a range of 10-12 ℃.
Further, the third temperature value is a temperature value within a range of 39-42 ℃, and the fourth temperature value is a temperature value within a range of 34-37 ℃.
The heat pump air conditioning system and the control logic provided by the invention have the beneficial effects that: when the environmental temperature is low, a small part of hot water prepared by the system is sprayed to the surface of the air-cooled heat exchanger to dissolve and defrost the frost layer on the surface of the heat exchanger, so that the heating capacity of the system is improved; when the environmental temperature is very high, a small part of cold water prepared by the system is utilized to carry out auxiliary cooling on the air-cooled heat exchanger, the condensing temperature of the system is reduced, the operation reliability and the operation efficiency of the system are further improved, the defrosting effect and the heating effect of the air-cooled heat exchanger under various low-temperature working conditions are fully guaranteed, meanwhile, the refrigerating effect under the high-temperature working condition can be improved, the annual operation efficiency of the system can be comprehensively improved, the heating effect of the cold system is improved, the operation comfort level is improved, and other multiple targets are achieved.
Drawings
FIG. 1 is a schematic view of a heat pump air conditioning system provided by the present invention;
FIG. 2 is a schematic view of a liquid spraying assisting apparatus provided in the present invention;
fig. 3 is a schematic view of a liquid outlet of the liquid jet outlet device provided by the invention.
The reference numbers in the figures are: 1-compressor, 2-high pressure exhaust pipe, 3-oil-gas separator, 4-air-cooled heat exchanger gas collecting pipe, 5-air-cooled heat exchanger, 6-air-cooled heat exchanger pipeline distributor, 7-high pressure liquid pipe, 8, electronic expansion valve for enhanced vapor injection, 9-plate type supercooling heat exchanger, 10-water-cooled heat exchanger electronic expansion valve, 11-water-cooled heat exchanger, 12-four-way valve, 13-low pressure gas-liquid separator, 14-oil return electromagnetic valve, 15-direct oil return capillary tube, 16-forced oil return capillary tube, 17-evacuation pipeline, 18-air discharge electromagnetic valve, 19-liquid spray electromagnetic valve, 20-water-cooled heat exchanger water outlet pipe, 21-water-cooled heat exchanger water return pipe, 22-liquid spray inlet pipe, 23-liquid spray connecting pipe, 24-water-cooled heat, A 25-water cooling heat exchanger refrigerant outlet pipe, a 26-liquid spray outlet device, a 27-fan, a 28-liquid spray outlet device liquid spray port, a 12 a-four-way valve high-pressure inlet, a 12 b-four-way valve first reversing port, a 12 c-four-way valve low-pressure air return port and a 12 d-four-way valve second reversing port.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It is to be understood that in describing the present invention, terms of direction or positional relationship indicated by the terms "in" and the like are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the apparatus or component must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1 and 2, the present invention provides a heat pump air conditioning system including: the system comprises a compressor 1, a high-pressure exhaust pipe 2, an oil-gas separator 3, an air-cooled heat exchanger gas collecting pipe 4, an air-cooled heat exchanger 5, an air-cooled heat exchanger pipeline distributor 6, a high-pressure liquid pipe 7, an electronic expansion valve 8 for enhanced vapor injection, a plate-type supercooling heat exchanger 9, an electronic expansion valve 10 for a water-cooled heat exchanger, a water-cooled heat exchanger 11, a four-way valve 12, a low-pressure gas-liquid separator 13, an oil return electromagnetic valve 14, a direct oil return capillary tube 15 and a forced oil return capillary tube 16, wherein the four-way valve 12 is provided with a four-way valve high-pressure inlet 12a, a four-. Further comprising: liquid ejection assisting device, the liquid ejection assisting device includes: the device comprises an emptying pipeline 17, an emptying electromagnetic valve 18, a liquid spraying electromagnetic valve 19, a water cooling heat exchanger water outlet pipe 20, a water cooling heat exchanger water outlet pipe 21, a liquid spraying inlet pipe, a liquid spraying connecting pipe, a water cooling heat exchanger refrigerant inlet pipe 24, a water cooling heat exchanger refrigerant outlet pipe 25, a liquid spraying outlet device 26, a fan 27 and a liquid spraying outlet device liquid spraying port 28, wherein the liquid spraying inlet pipe is connected with the water cooling heat exchanger water outlet pipe 20, and the liquid spraying outlet device 26 is arranged at the top end of the air cooling heat exchanger 5.
Referring to fig. 3, the liquid spraying opening 28 of the liquid spraying outlet device is in a hole-shaped structure and is evenly distributed in a circle, and the diameter of the liquid spraying device ranges from 5mm to 15 mm.
In the figure 1, a high-pressure inlet 12a of a four-way valve is communicated with a second reversing port 12d of the four-way valve, system exhaust directly enters an air-cooled heat exchanger 5 for condensation and heat exchange, a refrigerant after condensation and heat exchange, a connecting pipeline and a plate heat exchanger are subcooled, a water-cooled heat exchanger electronic expansion valve 10 is throttled and then enters a water-cooled heat exchanger 11 to complete heat exchange with circulating water to prepare circulating cold water with a set temperature, the circulating cold water after evaporation and heat exchange enters a low-pressure gas-liquid separator 13 through a first reversing port 12b of the four-way valve and then returns to a compressor 1 to complete refrigeration and power cycle, when the high-pressure inlet 12a of the four-way valve is communicated with the first reversing port 12b of the four-way valve, system exhaust directly enters the water-cooled heat exchanger 11 for condensation and heat exchange and provides heat for the, After being connected with a pipeline, the refrigerant enters the air-cooled heat exchanger 5 to be evaporated, enters the low-pressure gas-liquid separator 13 through a second reversing port 12d of the four-way valve and a low-pressure return air port 12c of the four-way valve, and then returns to the compressor 1 to finish the heating cycle.
In another aspect, the present invention further provides a heat pump air conditioning system control logic, where the control logic includes: the control logic comprises a refrigeration operation control logic, a heating operation control logic, an auxiliary liquid spraying defrosting control logic and an auxiliary liquid spraying enhanced refrigeration control logic.
Preferably, the cooling operation control logic is specifically: when the air conditioning system executes a common refrigeration operation program, the required cold water is provided according to the system load, the outlet water temperature of the water-cooling heat exchanger 11 is generally a first temperature value, the return water temperature is generally a second temperature value, and meanwhile, the liquid injection electromagnetic valve 19 is closed.
It should be understood that when the ambient temperature is high, the air-cooled heat exchanger 5 is cooled by the prepared small amount of cold water, so as to reduce the condensation temperature of the system and improve the refrigeration efficiency of the system.
Preferably, the heating operation control logic specifically includes: when the air conditioning system executes a common heating operation program and provides required hot water according to system load, the outlet water temperature of the water-cooling heat exchanger 11 is generally a third temperature value, the return water temperature is generally a fourth temperature value, and meanwhile, the liquid injection electromagnetic valve 19 is closed.
It is understood that when the air-cooled heat exchanger is in low environmental temperature and freezing rain, the prepared small part of hot water is sprayed on the surface of the air-cooled heat exchanger to dissolve and defrost the frost layer on the surface of the heat exchanger, thereby improving the heating capacity of the system.
Preferably, the auxiliary spray defrosting control logic specifically comprises: when the air conditioning system is in heating operation, the temperature detection unit detects the external environment temperature, when the environment temperature is lower than 5 ℃, the environment relative humidity is higher than 75%, the wall temperature of a refrigerant outlet pipe 25 of the water-cooling heat exchanger is lower than 0 ℃, the liquid spraying electromagnetic valve 19 is opened, the emptying electromagnetic valve 18 is closed, after defrosting is finished, the liquid spraying electromagnetic valve 19 is closed, the emptying electromagnetic valve 18 is opened, the time delay relay starts to work, after time delay is carried out for 30 minutes, the temperature detection unit detects the external environment temperature, the environment relative humidity and the temperature of the refrigerant outlet pipe 25 of the water-cooling heat exchanger again, when the environment temperature is lower than 5 ℃, the environment relative humidity is higher than 75%, and when the temperature of the refrigerant outlet pipe.
Specifically, when the air conditioning system is in a heating operation period, the temperature detection unit detects the external environment temperature, when the environment temperature is lower than 5 ℃, the environment relative humidity is higher than 75%, when the wall temperature of a refrigerant outlet pipe 25 of the water-cooling heat exchanger is lower than 0 ℃, the liquid spraying electromagnetic valve 19 is opened, the emptying electromagnetic valve 18 is closed, high-temperature hot water passes through the liquid spraying inlet pipe, the liquid spraying electromagnetic valve 19 and the liquid spraying connecting pipe and reaches the liquid spraying outlet device 26, the high-temperature hot water is sprayed to the surface of a fin of the air-cooling heat exchanger 5 through the liquid spraying outlet device 26 to defrost and clean the surface of the fin, the liquid spraying flow is 3-5% of the whole hot water flow, the continuous operation defrosting time is 10 minutes, after defrosting is finished, the liquid spraying electromagnetic valve 19 is closed, the emptying electromagnetic valve 18 is opened, hot water in the liquid spraying connecting pipe is emptied, freezing water in the liquid spraying connecting pipe; after emptying, the time delay relay starts to work, after time delay is carried out for 30 minutes, the temperature detection unit detects the external environment temperature, the environment relative humidity and the temperature of the water-cooling heat exchanger refrigerant outlet pipe 25 again, when the environment temperature is lower than 5 ℃, the environment relative humidity is higher than 75%, the temperature of the water-cooling heat exchanger refrigerant outlet pipe 25 is lower than 0 ℃, and the liquid spraying defrosting cycle is entered again.
Preferably, the auxiliary liquid injection enhanced refrigeration control logic specifically comprises: when the air conditioning system is in a refrigerating operation period, the temperature detection unit detects the external ambient temperature, when the ambient temperature is higher than 42 ℃, the wall temperature of the refrigerant outlet pipe 25 of the water-cooling heat exchanger is higher than 35 ℃, the liquid injection electromagnetic valve 19 is opened, the emptying electromagnetic valve 18 is closed, when the wall temperature of the refrigerant outlet pipe 25 of the water-cooling heat exchanger is lower than or equal to 32 ℃, the liquid injection electromagnetic valve 19 is closed, and the system is in a conventional refrigerating operation mode.
Specifically, when the air conditioning system is in a refrigerating operation period, the temperature detection unit detects the external environment temperature, when the environment temperature is higher than 42 ℃, the wall temperature of a refrigerant outlet pipe 25 of the water-cooling heat exchanger is higher than 35 ℃, a liquid injection electromagnetic valve 19 is opened, an emptying electromagnetic valve 18 is closed, low-temperature cold water passes through a liquid injection inlet pipe, the liquid injection electromagnetic valve 19 and a liquid injection connecting pipe and reaches a liquid injection outlet device 26, the low-temperature cold water is injected to the surface of a fin of the air-cooling heat exchanger 5 through the liquid injection outlet device 26, the surface of the fin is cooled, the condensation effect of the finned tube heat exchanger is enhanced, the supercooling degree of the refrigerant is improved, and the liquid injection flow; when the wall temperature of the refrigerant outlet pipe 25 of the water-cooling heat exchanger is less than or equal to 32 ℃, the liquid spraying electromagnetic valve 19 is closed, and the system is in a normal refrigeration running mode. Preferably, the first temperature value is a temperature value within a range of 5-7 ℃, and the second temperature value is a temperature value within a range of 10-12 ℃.
Preferably, the third temperature value is a temperature value within a range of 39-42 ℃, and the fourth temperature value is a temperature value within a range of 34-37 ℃.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
In addition, the combination of the method steps of the present invention is not limited to the above-mentioned combination, and those skilled in the art can flexibly adjust the combination of the above-mentioned method steps in practical applications, regardless of the combination of the method steps, as long as the scale attached to the heating element can be removed.
It should be noted that the above-mentioned embodiment is only a preferred embodiment of the present invention, and is only used for illustrating the principle of the method of the present invention, and is not intended to limit the protection scope of the present invention, and in practical applications, those skilled in the art can implement the above-mentioned function allocation by different steps, i.e. re-dividing or combining the steps in the embodiment of the present invention, as required. For example, the steps of the above embodiments may be combined into one step, or further divided into multiple sub-steps to complete all or part of the functions described above. For the names of the steps involved in the embodiments of the present invention, they are only for distinguishing the respective steps, and are not to be construed as limiting the present invention.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A heat pump air conditioning system, comprising: the device comprises a compressor (1), a high-pressure exhaust pipe (2), an oil-gas separator (3), an air-cooled heat exchanger gas collecting pipe (4), an air-cooled heat exchanger (5), an air-cooled heat exchanger pipeline distributor (6), a high-pressure liquid pipe (7), an electronic expansion valve (8) for enhanced vapor injection, a plate-type supercooling heat exchanger (9), an electronic expansion valve (10) for the water-cooled heat exchanger, a water-cooled heat exchanger (11), a four-way valve (12), a low-pressure gas-liquid separator (13), an oil return electromagnetic valve (14), a direct oil return capillary tube (15) and a forced oil return capillary tube (16), wherein the four-way valve (12) is provided with a four-way valve high-pressure inlet (12 a), a four-way.
2. The heat pump air conditioning system of claim 1, further comprising: liquid ejection assisting device, the liquid ejection assisting device includes: emptying pipe (17), unloading solenoid valve (18), hydrojet solenoid valve (19), water-cooled heat exchanger outlet pipe (20), water-cooled heat exchanger wet return (21), hydrojet import pipe (22), hydrojet connecting pipe (23), water-cooled heat exchanger refrigerant import pipe (24), water-cooled heat exchanger refrigerant outlet pipe (25), hydrojet exit device (26), fan (27), hydrojet exit device hydrojet mouth (28), wherein, hydrojet import pipe (22) with water-cooled heat exchanger outlet pipe (20) link to each other, hydrojet exit device (26) are seted up air-cooled heat exchanger (5) top.
3. The heat pump air conditioning system according to claim 1, wherein the liquid ejection outlet (28) is shaped as a hole structure with a circular uniform distribution, and the diameter of the liquid ejector is in the range of 5-15 mm.
4. A heat pump air conditioning system control logic, characterized in that said control logic comprises: the control logic comprises a refrigeration operation control logic, a heating operation control logic, an auxiliary liquid spraying defrosting control logic and an auxiliary liquid spraying enhanced refrigeration control logic.
5. The heat pump air conditioning system control logic of claim 4, wherein the cooling operation control logic is specifically: when the air conditioning system executes a common refrigeration operation program, required cold water is provided according to system load, the water outlet temperature of the water-cooling heat exchanger (11) is generally a first temperature value, the return water temperature is generally a second temperature value, and meanwhile, the liquid spraying electromagnetic valve (19) is closed.
6. The heat pump air conditioning system control logic of claim 4, wherein the heating operation control logic is specifically: when the air conditioning system executes a common heating operation program, required hot water is provided according to system load, the water outlet temperature of the water-cooling heat exchanger (11) is generally a third temperature value, the water return temperature is generally a fourth temperature value, and meanwhile, the liquid injection electromagnetic valve (19) is closed.
7. The heat pump air conditioning system control logic of claim 4, wherein the auxiliary spray defrost control logic is specifically: when the air conditioning system is in heating operation, the temperature detection unit detects the external environment temperature, when the environment temperature is lower than 5 ℃, the environment relative humidity is higher than 75%, the wall temperature of a refrigerant outlet pipe (25) of the water-cooling heat exchanger is lower than 0 ℃, the liquid spraying electromagnetic valve (19) is opened, the emptying electromagnetic valve (18) is closed, after defrosting is finished, the liquid spraying electromagnetic valve (19) is closed, the emptying electromagnetic valve (18) is opened, the time delay relay starts to work, after time delay is carried out for 30 minutes, the temperature detection unit detects the external environment temperature, the environment relative humidity and the temperature of the refrigerant outlet pipe (25) of the water-cooling heat exchanger again, when the environment temperature is lower than 5 ℃, the environment relative humidity is higher than 75%, the temperature of the refrigerant outlet pipe.
8. The heat pump air conditioning system control logic of claim 4, wherein the auxiliary spray enhanced refrigeration control logic is specifically: when the air conditioning system is in a refrigerating operation period, the temperature detection unit detects the external environment temperature, when the environment temperature is higher than 42 ℃, the wall temperature of a refrigerant outlet pipe (25) of the water-cooling heat exchanger is higher than 35 ℃, the liquid spraying electromagnetic valve (19) is opened, the emptying electromagnetic valve (18) is closed, when the wall temperature of the refrigerant outlet pipe (25) of the water-cooling heat exchanger is lower than or equal to 32 ℃, the liquid spraying electromagnetic valve (19) is closed, and the system is in a conventional refrigerating operation mode.
9. The heat pump air conditioning system control logic of claim 5, wherein the first temperature value is a temperature value in the range of 5-7 ℃ and the second temperature value is a temperature value in the range of 10-12 ℃.
10. The heat pump air conditioning system control logic of claim 6, wherein the third temperature value is a temperature value in the range of 39-42 ℃ and the fourth temperature value is a temperature value in the range of 34-37 ℃.
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