CN109163471B - Energy-saving comfortable type split heat pump air conditioning system and control method thereof - Google Patents
Energy-saving comfortable type split heat pump air conditioning system and control method thereof Download PDFInfo
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- CN109163471B CN109163471B CN201810791256.7A CN201810791256A CN109163471B CN 109163471 B CN109163471 B CN 109163471B CN 201810791256 A CN201810791256 A CN 201810791256A CN 109163471 B CN109163471 B CN 109163471B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 122
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000010257 thawing Methods 0.000 claims abstract description 20
- 239000003507 refrigerant Substances 0.000 claims description 88
- 238000005485 electric heating Methods 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000009827 uniform distribution Methods 0.000 claims description 12
- 238000005057 refrigeration Methods 0.000 claims description 9
- 229920006395 saturated elastomer Polymers 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 abstract description 6
- 230000008020 evaporation Effects 0.000 abstract description 6
- 238000009833 condensation Methods 0.000 abstract description 5
- 230000005494 condensation Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000003860 storage Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000009834 vaporization Methods 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/42—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger characterised by the use of the condensate, e.g. for enhanced cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/67—Switching between heating and cooling modes
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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
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
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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]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention relates to an energy-saving comfortable type split heat pump air conditioning system and a control method thereof. The heat pump air conditioning system solves the technical problems of poor operation effect and the like of the existing heat pump air conditioning system. The device comprises a compressor, a four-way reversing valve, an indoor finned tube heat exchanger, an electronic expansion valve, a gas-liquid separator, an outdoor finned tube heat exchanger, a liquid collecting distributor, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve and the like. The advantages are that: the recovered condensed water is distributed to the surfaces of the fins of the outdoor heat exchanger through the liquid collecting and distributing device, the condensed water flows along the surfaces of the fins and evaporates, and part of heat of air and the surfaces of the fins is taken away by utilizing evaporation latent heat, so that the condensation temperature of the system is reduced, and the COP of the air conditioning unit running in summer is improved. Can realize defrosting and heat supply and go on simultaneously, supply heat to indoor continuous incessant, effectual solution is because the indoor temperature fluctuation problem that defrosting arouses improves the thermal comfort in room greatly.
Description
Technical Field
The invention belongs to the technical field of heat pump air conditioning equipment, and particularly relates to an energy-saving comfortable type split heat pump air conditioning system and a control method thereof.
Background
Along with the continuous improvement of the living standard of people, the comfort and cleanliness requirements of people on living and working environments are increasingly high. Therefore, most of the buildings in China have multiple demands of winter heat supply, summer air conditioning and annual domestic hot water supply, and the heat pump air conditioning adopts various advanced energy saving technologies in cold and heat sources and systems, so that the heat pump air conditioning has higher energy utilization rate. The existing heat pump air conditioner mainly comprises an outdoor unit and an indoor unit, wherein a heat exchanger in the outdoor unit is called a condenser, and a heat exchanger in the indoor unit is called an evaporator. When the condenser works, heat must be dissipated to make the condenser work normally; the more sufficient the heat dissipation, the better the heat exchange effect between the condenser and the air, and the less the energy consumption of the condenser. When the evaporator in the existing indoor unit exchanges heat with indoor air, water vapor in the air can liquefy to form condensed water, the common heat pump air conditioning system does not collect the condensed water, and the condensed water is directly discharged, so that water resource waste is caused, and the condensed water is not reasonably utilized, so that the existing heat pump air conditioning system exists: poor running effect, low stability and the like.
In order to solve the problems existing in the prior art, long-term exploration is performed, and various solutions are proposed. For example, chinese patent literature discloses an air conditioner that can recycle condensed water [ application number: 201721586006.7, comprising an outdoor unit and a wall body for installing the outdoor unit, wherein the outdoor unit comprises a shell and a condenser positioned in the shell; the water storage tank is arranged on a wall body, a collecting pipe for recovering condensed water penetrates through the wall body, and the collecting pipe is communicated with the water storage tank; the water storage tank is provided with a booster water pump and a water outlet pipe connected with the booster water pump, and the water outlet pipe penetrates through the shell; the end part of the water outlet pipe, which is far away from the booster water pump, is provided with an atomization nozzle positioned in the shell, and a spray opening of the atomization nozzle faces the condenser. The problem that the condensed water of the existing air-conditioning heat pump system cannot be reasonably utilized is solved to a certain extent by the scheme, but the scheme still exists: poor stability and poor operation effect.
Disclosure of Invention
The invention aims at solving the problems and provides an energy-saving comfortable split heat pump air conditioning system which is simple and reasonable in structure and good in stability.
The invention also aims at providing an energy-saving comfortable split heat pump air conditioner control method with reasonable conception and good operation effect.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the energy-saving comfortable split heat pump air conditioning system comprises a compressor and is characterized in that the compressor is sequentially connected with a four-way reversing valve, an indoor finned tube heat exchanger and an electronic expansion valve through pipelines, an outlet pipeline of the electronic expansion valve is divided into two paths, one path is connected with a first electromagnetic valve and an inlet pipeline of a gas-liquid separator through pipelines, the other path is connected with a second electromagnetic valve through pipelines, an outlet pipeline of the second electromagnetic valve is divided into two paths, one path is connected with an outlet pipeline of a third electromagnetic valve and a gas-liquid separator through pipelines, the other path is sequentially connected with an outdoor finned tube heat exchanger and the four-way reversing valve through pipelines, the outlet pipeline of the four-way reversing valve is divided into two paths, one path is connected with a fourth electromagnetic valve and an inlet pipeline of the compressor through pipelines, the other path is connected with an inlet pipeline of a fifth electromagnetic valve and the gas-liquid separator through pipelines, the outlet pipeline of the gas-liquid separator is connected with a sixth electromagnetic valve and the inlet pipeline of the compressor, and the top of the outdoor finned tube heat exchanger is provided with a liquid collecting distributor connected with the indoor finned tube heat exchanger. The system can fully recycle and utilize the condensed water of the indoor finned tube heat exchanger when in summer operation, not only solves the problem of energy waste caused by direct discharge of the condensed water of the existing split air conditioner system, but also can reduce the condensation temperature of the outdoor finned tube heat exchanger and improve the COP of the system.
In the energy-saving comfortable type split heat pump air conditioning system, the bottom of the gas-liquid separator is provided with the electric heating pipe. When the system operates in a defrosting heat supply mode, low-temperature low-pressure gas-liquid two-phase refrigerant throttled by the electronic expansion valve does not enter the outdoor finned tube heat exchanger to absorb heat and evaporate, but directly enters the gas-liquid separator by switching different electromagnetic valves, and the electric heating tube in the gas-liquid separator is used for heating and vaporizing the liquid refrigerant, wherein the heating power of the electric heating tube is controlled by indoor load.
In the energy-saving comfortable split heat pump air conditioning system, an electric heating wire is arranged on a pipeline connected with the second electromagnetic valve and the third electromagnetic valve. Obviously, the branch pipe of the outlet of the gas-liquid separator leading to the inlet of the outdoor finned tube heat exchanger is provided with an electric heating wire, and the main purpose of the system is to heat saturated refrigerant steam from the gas-liquid separator when the system operates in a defrosting heat supply mode, so as to provide required heat for defrosting of the outdoor finned tube heat exchanger, and the heating power of the electric heating wire is controlled by the superheat degree of the refrigerant at the outlet of the outdoor finned tube heat exchanger.
In the energy-saving comfortable split heat pump air conditioning system, the liquid collecting distributor is provided with at least one collecting channel, the collecting channels are respectively communicated with a plurality of liquid uniform distribution channels, one end of each collecting channel is provided with a condensate water interface, a water collecting disc is arranged below the radiating fin of the indoor finned tube heat exchanger, and the water collecting disc is communicated with the condensate water interface.
In the energy-saving comfortable split heat pump air conditioning system, the liquid collecting and distributing device comprises a plurality of toothed protruding parts, the protruding parts are sequentially distributed to form toothed liquid uniform distribution channels, the liquid uniform distribution channels are respectively formed between two adjacent protruding parts, and fins of the outdoor finned tube heat exchanger are respectively arranged in the liquid uniform distribution channels.
In the energy-saving comfortable split heat pump air conditioning system, the fins of the outdoor finned tube heat exchanger are arranged between two adjacent protruding parts in a welding mode, and the heights of the fins of the outdoor finned tube heat exchanger are flush with the heights of the protruding parts. This ensures that the liquid flows evenly along the surface of the fins.
In the energy-saving comfortable split heat pump air conditioning system, the outdoor finned tube heat exchanger is provided with a plurality of fin groups, each fin group is provided with a plurality of fins which are arranged at equal intervals in sequence, and the collecting channels are formed between two adjacent fin groups.
The energy-saving comfortable type split heat pump air conditioner control method of the energy-saving comfortable type split heat pump air conditioner system is as follows:
the energy-saving comfortable type split heat pump air conditioner control method comprises the following steps:
A. when the system operates in summer, the system is in a refrigeration mode, the sixth electromagnetic valve, the second electromagnetic valve and the fifth electromagnetic valve are opened, and the third electromagnetic valve, the first electromagnetic valve and the fourth electromagnetic valve are closed; the high-temperature and high-pressure refrigerant vapor at the outlet of the compressor enters an outdoor finned tube heat exchanger to be condensed into high-temperature and high-pressure liquid, the high-temperature and high-pressure refrigerant liquid is throttled by an electronic expansion valve 3 to become low-temperature and low-pressure gas-liquid two-phase refrigerant, the low-temperature and low-pressure gas-liquid two-phase refrigerant enters the indoor finned tube heat exchanger to absorb heat to become low-temperature and low-pressure gas-state refrigerant, and the low-temperature and low-pressure gas-state refrigerant is sucked by the compressor to be compressed into the high-temperature and high-pressure gas-state refrigerant to form a refrigeration cycle;
B. when the system runs in winter, the system is in a heating mode, the four-way reversing valve reverses, the sixth electromagnetic valve, the second electromagnetic valve and the fifth electromagnetic valve are simultaneously opened, and the third electromagnetic valve, the first electromagnetic valve and the fourth electromagnetic valve are closed; the high-temperature and high-pressure refrigerant vapor at the outlet of the compressor enters the indoor finned tube heat exchanger, heat is released indoors to condense into high-temperature and high-pressure liquid, the high-temperature and high-pressure refrigerant liquid is throttled by the electronic expansion valve and then becomes low-temperature and low-pressure gas-liquid two-phase refrigerant, the low-temperature and low-pressure gas-liquid two-phase refrigerant enters the outdoor finned tube heat exchanger to absorb heat and then becomes low-temperature and low-pressure gas-state refrigerant, and the low-temperature and low-pressure gas-state refrigerant is compressed into the high-temperature and high-pressure gas-state refrigerant after being inhaled by the compressor to form a heating cycle.
In the above energy-saving comfortable split heat pump air conditioner control method, in the step A, in the refrigeration cycle, because the surface fin temperature of the indoor finned tube heat exchanger is lower than the indoor air dew point temperature, water vapor in the indoor air is condensed into water and then enters into the water collecting tray, and enters into the liquid collecting distributor embedded at the top of the outdoor finned tube heat exchanger through the pipeline under the action of gravity, the condensed water flows in the collecting channel of the liquid collecting distributor, and is distributed to the fin surfaces of the outdoor finned tube heat exchanger through the zigzag liquid uniform distribution channels at two sides of the collecting channel, and film-shaped flow is formed on the fin surfaces.
In the above energy-saving comfortable type split heat pump air conditioner control method, in step B, when running in winter, the system is in defrosting heating mode, the four-way reversing valve is not reversed, the sixth electromagnetic valve, the second electromagnetic valve and the fifth electromagnetic valve are closed, the third electromagnetic valve, the first electromagnetic valve and the fourth electromagnetic valve are opened, the high-temperature high-pressure refrigerant vapor at the outlet of the compressor enters the indoor finned tube heat exchanger, the high-temperature high-pressure liquid refrigerant is condensed into high-temperature high-pressure liquid refrigerant by radiating heat indoors, the high-temperature high-pressure liquid refrigerant is throttled by the electronic expansion valve and becomes low-temperature low-pressure gas-liquid two-phase refrigerant, the low-temperature low-pressure gas-liquid two-phase refrigerant enters the gas-liquid separator through the first electromagnetic valve, the low-temperature liquid refrigerant is heated by the electric heating tube in the gas-liquid separator and becomes saturated gas refrigerant, the saturated gas refrigerant is heated by the electric heating wire through the third electromagnetic valve and enters the outdoor finned tube heat exchanger, the high-temperature gas refrigerant is discharged by the high-temperature gas refrigerant and becomes low-temperature gas refrigerant, and then enters the compressor, and is compressed into high-temperature high-pressure gas refrigerant, and forms a circulation until the outdoor finned tube heat exchanger is completely switched to a thermal-type frosted surface layer system.
Compared with the prior art, the energy-saving comfortable type split heat pump air conditioning system and the control method thereof have the advantages that:
1. according to the invention, power equipment such as a water pump and an atomizer are not required to be additionally added, on the premise that the use and manufacturing cost of an air conditioner are not basically increased, the condensate water of the indoor finned tube heat exchanger is recovered into the liquid collecting and distributing device arranged at the top of the outdoor finned tube heat exchanger by utilizing the installation height difference of the indoor and outdoor heat exchangers, the recovered condensate water is distributed to the fin surfaces of the outdoor finned tube heat exchanger by the liquid collecting and distributing device, the condensate water flows along the fin surfaces and evaporates, and part of air and heat on the fin surfaces is taken away by utilizing evaporation latent heat, so that the condensation temperature of the system is reduced, and the COP (coefficient of performance) of an air conditioning unit in summer is improved.
2. Compared with the traditional defrosting mode, the invention can realize simultaneous defrosting and heat supply and supply heat to the room continuously and uninterruptedly, effectively solves the problem of indoor temperature fluctuation caused by defrosting and greatly improves the thermal comfort of the room.
3. When the defrosting system is operated in the defrosting mode, the heat supply and defrosting heat consumption are controlled separately, so that the stable, efficient and safe operation of the system is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a structure provided by the present invention;
FIG. 2 is a top view of an outdoor finned tube heat exchanger of the present invention;
FIG. 3 is a side view of an outdoor finned tube heat exchanger of the present invention;
FIG. 4 is a cross-sectional view of an outdoor finned tube heat exchanger A-A of the invention.
In the figure, a compressor 1, an indoor finned tube heat exchanger 2, an electronic expansion valve 3, an outdoor finned tube heat exchanger 4, a four-way reversing valve 5, a gas-liquid separator 6, an electric heating wire 7, an electric heating tube 8, a sixth electromagnetic valve 9, a third electromagnetic valve 10, a first electromagnetic valve 11, a second electromagnetic valve 12, a fourth electromagnetic valve 13, a fifth electromagnetic valve 14, a liquid collecting distributor 15, a protruding part 151, fins 152, collecting channels 16, liquid uniform distribution channels 17 and a condensed water interface 18.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1-4, the energy-saving comfortable split heat pump air conditioning system comprises a compressor 1, wherein the compressor 1 is sequentially connected with a four-way reversing valve 5, an indoor finned tube heat exchanger 2 and an electronic expansion valve 3 through pipelines, an outlet pipeline of the electronic expansion valve 3 is divided into two paths, one path is connected with a first electromagnetic valve 11 and an inlet pipeline of a gas-liquid separator 6 through pipelines, the other path is connected with a second electromagnetic valve 12 through pipelines, the outlet pipeline of the second electromagnetic valve 12 is divided into two paths, one path is connected with an outlet pipeline of a third electromagnetic valve 10 and a gas-liquid separator 6 through pipelines, the other path is sequentially connected with an outdoor finned tube heat exchanger 4 and the four-way reversing valve 5 through pipelines, the other path is divided into two paths on the outlet pipeline of the four-way reversing valve 5, the other path is connected with an inlet pipeline of a fourth electromagnetic valve 13 and the compressor 1, the other path is connected with an inlet pipeline of a fifth electromagnetic valve 14 and a gas-liquid separator 6 through pipelines, the outlet pipeline of the gas-liquid separator 6 is connected with an inlet pipeline of a sixth electromagnetic valve 9 and the compressor 1, and a liquid collecting distributor 15 connected with the indoor finned tube heat exchanger 2 is arranged at the top of the outdoor finned tube heat exchanger 4. The system can fully recycle and utilize the condensed water of the indoor finned tube heat exchanger 2 in summer, not only solves the problem of energy waste caused by direct discharge of the condensed water of the existing split air conditioner system, but also can reduce the condensation temperature of the outdoor finned tube heat exchanger 4 and improve the COP of the system.
Further, an electric heating pipe 8 is arranged at the bottom of the gas-liquid separator 6. When the system operates in a defrosting heat supply mode, low-temperature low-pressure gas-liquid two-phase refrigerant throttled by the electronic expansion valve 3 does not enter the outdoor finned tube heat exchanger 4 for heat absorption and evaporation, but directly enters the gas-liquid separator 6 by switching different electromagnetic valves, and the electric heating tube 8 in the gas-liquid separator 6 is used for heating and vaporizing the liquid refrigerant, wherein the heating power of the electric heating tube 8 is controlled by indoor load. Wherein, the pipeline of the second electromagnetic valve 12 and the third electromagnetic valve 10 is provided with an electric heating wire 7. Obviously, an electric heating wire 7 is arranged on a branch pipe from the outlet of the gas-liquid separator 6 to the inlet of the outdoor finned tube heat exchanger 4, and the main purpose of the system is to heat saturated refrigerant steam from the gas-liquid separator 6 when the system operates in a defrosting heat supply mode, so as to provide required heat for defrosting of the outdoor finned tube heat exchanger 4, and the heating power of the electric heating wire is controlled by the superheat degree of the refrigerant at the outlet of the outdoor finned tube heat exchanger 4. Therefore, when the system runs in winter, the system can realize that heat is not required to be absorbed indoors in a defrosting mode, and hot air can be continuously fed into the indoor, so that a comfortable indoor thermal environment is ensured.
Further, in order to collect and distribute condensed water, the liquid collecting distributor 15 has at least one collecting channel 16, the collecting channels 16 are respectively communicated with a plurality of liquid uniformly distributed channels 17, one end of the collecting channel 16 is provided with a condensed water interface 18, and a water collecting disc is arranged below the radiating fins of the indoor finned tube heat exchanger 2 and is communicated with the condensed water interface 18. The liquid collecting and distributing device 15 comprises a plurality of tooth-shaped protruding portions 151, the protruding portions 151 are sequentially distributed to form zigzag liquid uniformly distributed channels 17, the liquid uniformly distributed channels 17 are respectively formed between two adjacent protruding portions 151, and fins 152 of the outdoor finned tube heat exchanger 4 are respectively arranged in the liquid uniformly distributed channels 17.
Preferably, the fins 152 of the outdoor finned tube heat exchanger 4 herein are disposed between the adjacent two bosses 151 by welding, and the height of the fins 152 of the outdoor finned tube heat exchanger 4 is flush with the height of the bosses 151. This ensures that the liquid flows evenly along the surface of the fins. Preferably, the outdoor finned tube heat exchanger 4 herein has a plurality of fin groups, and each fin group has a plurality of fins 152 arranged in succession at equal intervals, and the collecting channel 16 is formed between adjacent two fin groups.
Therefore, power equipment such as a water pump and an atomizer are not required to be additionally added, on the premise that the use and manufacturing cost of an air conditioner are not basically increased, the condensate water of the indoor finned tube heat exchanger 2 is recovered to the liquid collecting and distributing device 15 arranged at the top of the outdoor finned tube heat exchanger 4 by utilizing the installation height difference of the indoor and outdoor heat exchangers, the recovered condensate water is distributed to the fin surfaces of the outdoor finned tube heat exchanger 4 by the liquid collecting and distributing device 15, the condensate water flows along the fin surfaces and evaporates, and part of air and heat on the fin surfaces is taken away by utilizing evaporation latent heat, so that the condensation temperature of the system is reduced, and the COP (coefficient of performance) of an air conditioning unit in summer is improved.
The energy-saving comfortable type split heat pump air conditioner control method in the embodiment comprises the following steps:
A. when the system operates in summer, the system is in a refrigeration mode, the sixth electromagnetic valve 9, the second electromagnetic valve 12 and the fifth electromagnetic valve 14 are opened, and the third electromagnetic valve 10, the first electromagnetic valve 11 and the fourth electromagnetic valve 13 are closed; the high-temperature and high-pressure refrigerant steam at the outlet of the compressor 1 enters the outdoor finned tube heat exchanger 4 to be condensed into high-temperature and high-pressure liquid, the high-temperature and high-pressure refrigerant liquid is throttled by the electronic expansion valve 3 to become low-temperature and low-pressure gas-liquid two-phase refrigerant, the low-temperature and low-pressure gas-liquid two-phase refrigerant enters the indoor finned tube heat exchanger 2 to absorb heat to become low-temperature and low-pressure gas-state refrigerant, and the low-temperature and low-pressure gas-state refrigerant is sucked by the compressor 1 to be compressed into the high-temperature and high-pressure gas-state refrigerant to form a refrigeration cycle;
in the refrigeration cycle process, as the surface fin temperature of the indoor finned tube heat exchanger 2 is lower than the indoor air dew point temperature, water vapor in the indoor air is condensed into water and then enters the water collecting tray, the water vapor enters the liquid collecting and distributing device 15 embedded at the top of the outdoor finned tube heat exchanger 4 through a pipeline under the action of gravity, the condensed water flows in the collecting channels 16 of the liquid collecting and distributing device 15 and is distributed to the surfaces of the fins 152 of the outdoor finned tube heat exchanger 4 through the sawtooth-shaped liquid uniform distribution channels 17 at two sides of the collecting channels 16, the film-shaped flowing evaporation of the liquid on the surfaces of the fins 152 is utilized to fully utilize the low-temperature cold energy of the condensed water and the vaporization latent heat of the liquid evaporation, the COP of the unit running in summer is improved, and energy is saved.
B. When the system runs in winter, the system is in a heating mode, the four-way reversing valve 5 reverses, the sixth electromagnetic valve 9, the second electromagnetic valve 12 and the fifth electromagnetic valve 14 are simultaneously opened, and the third electromagnetic valve 10, the first electromagnetic valve 11 and the fourth electromagnetic valve 13 are closed; the high-temperature and high-pressure refrigerant vapor at the outlet of the compressor 1 enters the indoor finned tube heat exchanger 2, and is condensed into high-temperature and high-pressure liquid by radiating heat indoors, the high-temperature and high-pressure refrigerant liquid is throttled by the electronic expansion valve 3 and becomes low-temperature and low-pressure gas-liquid two-phase refrigerant, the low-temperature and low-pressure gas-liquid two-phase refrigerant enters the outdoor finned tube heat exchanger 4 to absorb heat and becomes low-temperature and low-pressure gas-state refrigerant, and the low-temperature and low-pressure gas-state refrigerant is sucked by the compressor 1 and is compressed into the high-temperature and high-pressure gas-state refrigerant to form a heating cycle.
When the heat pump air conditioner operates in winter, the surface of the outdoor finned tube heat exchanger 4 frosts when the surface temperature of the outdoor finned tube heat exchanger 4 is lower than the dew point temperature of the outdoor air and lower than zero, and the unit needs to defrost when the thickness of the frost layer reaches a certain thickness.
When the system operates in winter, the four-way reversing valve 5 is in a defrosting heat supply mode, the sixth electromagnetic valve 9, the second electromagnetic valve 12 and the fifth electromagnetic valve 14 are closed, the third electromagnetic valve 10, the first electromagnetic valve 11 and the fourth electromagnetic valve 13 are opened, high-temperature and high-pressure refrigerant steam at the outlet of the compressor 1 enters the indoor finned tube heat exchanger 2, high-temperature and high-pressure liquid refrigerant is condensed into high-temperature and high-pressure liquid refrigerant through heat release to the indoor, the high-temperature and high-pressure liquid refrigerant is throttled by the electronic expansion valve 3 and then becomes low-temperature and low-pressure gas-liquid two-phase refrigerant, the low-temperature and low-pressure gas-liquid two-phase refrigerant enters the gas-liquid separator 6 through the first electromagnetic valve 11, the low-temperature liquid refrigerant is heated by the electric heating tube 8 in the gas-liquid separator 6 and then becomes saturated gas refrigerant, the saturated gas refrigerant enters the outdoor finned tube heat exchanger 4 after being heated by the electric heating wire 7 after passing through the third electromagnetic valve 10, the high-temperature gas refrigerant releases heat and becomes low-temperature gas refrigerant and flows out of the outdoor finned tube heat exchanger 4 and then enters the compressor 1, and is compressed into high-temperature and high-pressure gas refrigerant, and forms a circulation type, and the whole system is completely cooled by the outdoor finned tube heat exchanger 4. In the defrosting heat supply mode, the electric heating wire 7 controls defrosting heat consumption, and the heating electric power of the electric heating wire 7 is adjusted by measuring the superheat degree of the refrigerant at the outlet of the outdoor finned tube heat exchanger 4; the electric heating pipe 8 controls the heat supply quantity of the heat pump unit, and the heating power of the electric heating pipe 8 is adjusted to adjust the circulating refrigerant flow of the heat pump air conditioning system, so that the heat supply quantity of the unit is adjusted.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although terms of the compressor 1, the indoor finned tube heat exchanger 2, the electronic expansion valve 3, the outdoor finned tube heat exchanger 4, the four-way reversing valve 5, the gas-liquid separator 6, the electric heating wire 7, the electric heating tube 8, the sixth electromagnetic valve 9, the third electromagnetic valve 10, the first electromagnetic valve 11, the second electromagnetic valve 12, the fourth electromagnetic valve 13, the fifth electromagnetic valve 14, the liquid collecting distributor 15, the boss 151, the fins 152, the collecting channel 16, the liquid uniform distribution channel 17, the condensate port 18, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (4)
1. The energy-saving comfortable split type heat pump air conditioning system is characterized in that the compressor (1) is sequentially connected with a four-way reversing valve (5), an indoor finned tube heat exchanger (2) and an electronic expansion valve (3) through pipelines, the outlet pipeline of the electronic expansion valve (3) is divided into two paths, one path is connected with a first electromagnetic valve (11) and an inlet pipeline of a gas-liquid separator (6) through pipelines, the other path is connected with a second electromagnetic valve (12) through pipelines, the outlet pipeline of the second electromagnetic valve (12) is divided into two paths, one path is connected with an outlet pipeline of a third electromagnetic valve (10) and a gas-liquid separator (6) through pipelines, the other path is sequentially connected with an outdoor finned tube heat exchanger (4) and the four-way reversing valve (5) through pipelines, the outlet pipeline of the four-way reversing valve (5) is divided into two paths, the other path is connected with an inlet pipeline of the first electromagnetic valve (11) and the gas-liquid separator (6) through pipelines, the other path is connected with a fifth electromagnetic valve (14) and the inlet pipeline of the gas-liquid separator (6) through pipelines, and the inlet pipeline of the six-liquid separator (6) is connected with the inlet pipeline (9) of the indoor finned tube heat exchanger (4) and the indoor finned tube heat exchanger (5) is connected with the inlet pipeline (9); an electric heating pipe (8) is arranged at the bottom of the gas-liquid separator (6); an electric heating wire (7) is arranged on a pipeline connected with the second electromagnetic valve (12) and the third electromagnetic valve (10); the liquid collecting and distributing device (15) is provided with at least one collecting channel (16), the collecting channels (16) are respectively communicated with a plurality of liquid uniformly distributed channels (17), one end of each collecting channel (16) is provided with a condensate water interface (18), a water collecting disc is arranged below the radiating fins of the indoor finned tube heat exchanger (2), and the water collecting discs are communicated with the condensate water interfaces (18); the liquid collecting and distributing device (15) comprises a plurality of tooth-shaped protruding parts (151), the protruding parts (151) are sequentially distributed to form sawtooth-shaped liquid uniform distribution channels (17), the liquid uniform distribution channels (17) are respectively formed between two adjacent protruding parts (151), and fins (152) of the outdoor finned tube heat exchanger (4) are respectively arranged in the liquid uniform distribution channels (17); the fins (152) of the outdoor finned tube heat exchanger (4) are arranged between two adjacent convex parts (151) in a welding mode, and the height of the fins (152) of the outdoor finned tube heat exchanger (4) is flush with the height of the convex parts (151); the outdoor finned tube heat exchanger (4) is provided with a plurality of fin groups, each fin group is provided with a plurality of fins (152) which are sequentially arranged at equal intervals, and the collecting channels (16) are formed between two adjacent fin groups.
2. An energy-saving comfortable type split heat pump air conditioner control method of an energy-saving comfortable type split heat pump air conditioner system according to claim 1, characterized by comprising the steps of:
A. when the system operates in summer, the system is in a refrigeration mode, the sixth electromagnetic valve (9), the second electromagnetic valve (12) and the fifth electromagnetic valve (14) are opened, and the third electromagnetic valve (10), the first electromagnetic valve (11) and the fourth electromagnetic valve (13) are closed; the high-temperature high-pressure refrigerant steam at the outlet of the compressor (1) enters the outdoor finned tube heat exchanger (4) to be condensed into high-temperature high-pressure liquid, the high-temperature high-pressure refrigerant liquid is throttled by the electronic expansion valve (3) to become low-temperature low-pressure gas-liquid two-phase refrigerant, the low-temperature low-pressure gas-liquid two-phase refrigerant enters the indoor finned tube heat exchanger (2) to absorb heat to become low-temperature low-pressure gas-state refrigerant, and the low-temperature low-pressure gas-state refrigerant is sucked by the compressor (1) to be compressed into the high-temperature high-pressure gas-state refrigerant to form a refrigeration cycle;
B. when the system runs in winter, the system is in a heating mode, the four-way reversing valve (5) reverses, the sixth electromagnetic valve (9), the second electromagnetic valve (12) and the fifth electromagnetic valve (14) are simultaneously opened, and the third electromagnetic valve (10), the first electromagnetic valve (11) and the fourth electromagnetic valve (13) are closed; the high-temperature high-pressure refrigerant steam at the outlet of the compressor (1) enters the indoor finned tube heat exchanger (2), heat is released indoors to condense into high-temperature high-pressure liquid, the high-temperature high-pressure refrigerant liquid is throttled by the electronic expansion valve (3) to become low-temperature low-pressure gas-liquid two-phase refrigerant, the low-temperature low-pressure gas-liquid two-phase refrigerant enters the outdoor finned tube heat exchanger (4) to absorb heat to become low-temperature low-pressure gas-state refrigerant, and the low-temperature low-pressure gas-state refrigerant is sucked by the compressor (1) to be compressed into the high-temperature high-pressure gas-state refrigerant to form a heating cycle.
3. The energy-saving and comfortable type split heat pump air conditioner control method according to claim 2, wherein in the step a, during the refrigeration cycle, as the surface fin temperature of the indoor finned tube heat exchanger (2) is lower than the indoor air dew point temperature, water vapor in the indoor air is condensed into water and enters the water collecting tray, and enters the liquid collecting distributor (15) embedded at the top of the outdoor finned tube heat exchanger (4) through the pipeline under the action of gravity, the condensed water flows in the collecting channels (16) of the liquid collecting distributor (15), is distributed to the surfaces of the fins (152) of the outdoor finned tube heat exchanger (4) through the sawtooth-shaped liquid uniform distribution channels (17) at two sides of the collecting channels (16), and forms membranous flow on the surfaces of the fins (152).
4. The energy-saving comfortable type split heat pump air conditioner control method according to claim 2, wherein in the step B, when running in winter, the system is in defrosting heating mode, the four-way reversing valve (5) is not reversed, meanwhile, the sixth electromagnetic valve (9), the second electromagnetic valve (12) and the fifth electromagnetic valve (14) are closed, the third electromagnetic valve (10), the first electromagnetic valve (11) and the fourth electromagnetic valve (13) are opened, high-temperature and high-pressure refrigerant vapor at the outlet of the compressor (1) enters the indoor finned tube heat exchanger (2), high-temperature and high-pressure liquid refrigerant is condensed by heat release into high-temperature and high-pressure liquid refrigerant through indoor heat release, the high-temperature and high-pressure liquid refrigerant becomes low-temperature and low-pressure gas-liquid two-phase refrigerant after being throttled by the electronic expansion valve (3), the low-temperature and low-pressure gas-liquid two-phase refrigerant enters the gas-liquid separator (6) through the first electromagnetic valve (11), the low-temperature liquid refrigerant becomes saturated gaseous refrigerant after being heated by the electric heating wire (8) in the gas-liquid separator (6), the saturated gaseous refrigerant enters the heat tube heat exchanger (4) after being heated by the electric heating wire (7), the high-temperature and high-pressure refrigerant enters the outdoor heat exchanger (4) after being discharged into the high-temperature and high-pressure air circulating tube heat, the high-pressure air refrigerant enters the outdoor heat exchanger (1), and switching to a heating mode until all the surface frost layer removing systems of the outdoor finned tube heat exchanger (4).
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| WO2021135990A1 (en) * | 2019-12-31 | 2021-07-08 | 杭州三花微通道换热器有限公司 | Heat exchange system |
| CN111473498B (en) * | 2020-04-29 | 2021-10-08 | 广东美的暖通设备有限公司 | Air conditioning system, anti-condensation control method and device thereof, and storage medium |
| CN113320350B (en) * | 2021-06-02 | 2024-04-12 | 浙江吉利控股集团有限公司 | Heat pump air conditioning system without reversing and vehicle |
| CN114427716B (en) * | 2022-02-16 | 2023-02-17 | 珠海格力电器股份有限公司 | Condensed water recycling device and air conditioner outdoor unit with same |
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