CN114484945A - Air conditioner refrigeration system and control method thereof - Google Patents
Air conditioner refrigeration system and control method thereof Download PDFInfo
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- CN114484945A CN114484945A CN202210248931.8A CN202210248931A CN114484945A CN 114484945 A CN114484945 A CN 114484945A CN 202210248931 A CN202210248931 A CN 202210248931A CN 114484945 A CN114484945 A CN 114484945A
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 238000004378 air conditioning Methods 0.000 claims abstract description 35
- 230000000694 effects Effects 0.000 claims description 4
- 241000521257 Hydrops Species 0.000 claims 1
- 206010030113 Oedema Diseases 0.000 claims 1
- 230000029058 respiratory gaseous exchange Effects 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 238000002347 injection Methods 0.000 abstract description 5
- 239000007924 injection Substances 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 65
- 239000003507 refrigerant Substances 0.000 description 26
- 239000010687 lubricating oil Substances 0.000 description 11
- 239000010726 refrigerant oil Substances 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009491 slugging Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/385—Dispositions with two or more expansion means arranged in parallel on a refrigerant line leading to the same evaporator
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
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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
- F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
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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
- F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air-conditioning refrigeration system and a control method thereof, wherein the air-conditioning refrigeration system comprises a compressor, a condenser, a throttling element and an evaporator which are sequentially connected to form a refrigeration cycle, and further comprises an oil separator which is connected between an exhaust port of the compressor and an air inlet of the condenser, and an ejector which can atomize accumulated liquid in the evaporator and return oil of the oil separator at an outlet of the ejector under the action of pressure difference between the return oil of the oil separator and suction air of the compressor. According to the invention, the ejector is adopted to replace a capillary tube of an air-conditioning refrigeration system in the prior art, the expansion work of throttling and pressure reduction during oil return is fully recycled, and meanwhile, the liquid in the ejector is sucked and injected by using the injection port of the ejector, so that the system is more energy-saving, simultaneously the defect that the liquid storage phenomenon is easy to occur at the bottom of the evaporator is effectively overcome, and the liquid compression or air suction liquid impact phenomenon of a compressor is prevented.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to an air-conditioning refrigeration system and a control method thereof.
Background
In the existing vapor compression refrigeration cycle, a compressor is an important part and is used as a power source for flowing of a refrigerant in a system cycle, and the compressors in most refrigeration cycles need sufficient lubrication, so that the lubrication of moving parts such as a crankshaft, a bearing, a connecting rod and the like is ensured, and the sealing of a moving surface in a compression chamber can be enhanced. However, lubricating oil and refrigerant are mutually soluble and separated, so that lubricating oil is easy to stay in a refrigeration system, and sufficient backflow amount of the lubricating oil cannot be realized in some severe operating conditions, so that the compressor runs in an oil-deficient manner, the efficiency is reduced, the compressor is easy to overheat, the cylinder is damaged, and the like.
The reasons for unsmooth oil return are many, the structural design has oil return dead corners, the low-frequency operation refrigerant flow rate cannot carry more oil to return to the compressor, the branch flow rate at the bottom of the gas collecting pipe is low, the oil return is insufficient, and the like.
In the design of a common air-conditioning refrigeration system, an oil separator is adopted to separate lubricating oil (also called as freezing oil) in high-pressure exhaust in advance, and the separated lubricating oil is led to return to an air suction pipeline of a compressor in advance under the action of high-pressure and low-pressure differential pressure through structures such as an oil return capillary tube and the like, so that the flow of the lubricating oil flowing at other positions in the refrigeration system is very small, and the compressor is ensured to have good lubrication. But the throttling and pressure reducing of the oil return capillary tube lose expansion work, which is not beneficial to the energy saving of the system; in a refrigeration system without a gas-liquid separator, in order to prevent liquid refrigerant in an evaporator from entering a compressor, a return air manifold is usually connected above the highest possible liquid level in a gas collecting manifold of the evaporator, but this easily causes the liquid refrigerant and lubricating oil to be easily stored in the bottom of the gas collecting manifold, because the refrigerant flow of a bottom branch is small, the flow rate is low, and cannot carry enough liquid refrigerant and/or lubricating oil to flow upwards, the liquid refrigerant and the retained part of lubricating oil are easily accumulated at the bottom of the gas collecting manifold after the operation time is too long, when the liquid level gradually rises, a liquid seal is easily formed on the bottom branch, the flow of the refrigerant which can pass through is less, and thus a liquid storage phenomenon is formed at the bottom of the evaporator, obviously, more lubricating oil is also stored in the liquid refrigerant, and the refrigerant circulation quantity of the refrigeration system is easily insufficient, and, And oil return is insufficient.
Disclosure of Invention
Therefore, the air-conditioning refrigeration system and the control method thereof provided by the invention can overcome the defects that the air-conditioning refrigeration system in the prior art adopts the oil return capillary tube for throttling and reducing pressure to lose expansion work, the system is not favorable for energy conservation, and the bottom of the evaporator is easy to have a liquid storage phenomenon.
In order to solve the above problems, the present invention provides an air-conditioning refrigeration system, including a compressor, a condenser, a throttling element, an evaporator, the compressor, the condenser, the throttling element, the evaporator are connected in sequence to form a refrigeration cycle, the air-conditioning refrigeration system further includes an oil separator, the oil separator is connected between an exhaust port of the compressor and an air inlet of the condenser, and the ejector is capable of atomizing accumulated liquid in the evaporator and return oil of the oil separator at an outlet of the ejector under the action of a pressure difference between return oil of the oil separator and suction air of the compressor.
In some embodiments, a filter is disposed between the first inlet of the ejector and the oil return of the oil separator.
In some embodiments, a one-way valve is provided on the first conduit between the second inlet of the ejector and the header of the evaporator.
In some embodiments, a capillary tube is further disposed on the first pipeline.
In some embodiments, the first conduit includes an intake tube section in communication with a bottom of the header, the intake tube section extending above the bottom.
In some embodiments, a solenoid valve is provided in the line between the outlet of the ejector and the suction inlet of the compressor.
In some embodiments, the compressor is on the indoor side.
The invention also provides a control method of the air-conditioning refrigeration system, which is used for controlling the air-conditioning refrigeration system and comprises the following steps:
acquiring a control instruction;
and controlling the on-off of the electromagnetic valve according to the control instruction.
In some embodiments of the present invention, the substrate is,
when the control instruction is that the return oil is opened, controlling the electromagnetic valve to be conducted;
and when the control instruction is that the oil return stops, controlling the electromagnetic valve to be cut off.
According to the air-conditioning refrigeration system and the control method thereof, the ejector is adopted to replace a capillary tube of the air-conditioning refrigeration system in the prior art, the expansion work of throttling and pressure reduction during oil return is fully recycled, and meanwhile, the liquid in the ejector is sucked and injected by utilizing the injection port of the ejector, so that the system is more energy-saving, the defect that the liquid storage phenomenon is easy to occur at the bottom of the evaporator is effectively overcome, and the liquid compression or air suction liquid impact phenomenon of a compressor is prevented.
Drawings
Fig. 1 is a schematic diagram of an air conditioning refrigeration system according to an embodiment of the present invention.
The reference numerals are represented as:
1. a compressor; 2. a condenser; 21. a gas distributing pipe; 22. a liquid collecting pipe; 3. a throttling element; 4. an evaporator; 41. a gas collecting pipe; 42. a liquid separation head; 43. a branch liquid separating pipe; 5. an oil separator; 6. an ejector; 71. a filter; 72. a one-way valve; 73. a capillary tube; 74. an electromagnetic valve; 75. a forked tube.
Detailed Description
Referring to fig. 1, according to an embodiment of the present invention, an air-conditioning refrigeration system is provided, including a compressor 1, a condenser 2, a throttling element 3 (specifically, an expansion valve), and an evaporator 4, where the compressor 1, the condenser 2, the throttling element 3, and the evaporator 4 are sequentially connected to form a refrigeration cycle, the air-conditioning refrigeration system further includes an oil separator 5, the oil separator 5 is connected between an exhaust port of the compressor 1 and an intake port of the condenser 2, and the ejector 6 is further included, and the ejector 6 is capable of atomizing accumulated liquid in the evaporator 4 and return oil of the oil separator 5 at an outlet of the ejector 6 under an effect of a pressure difference between the return oil of the oil separator 5 and suction air of the compressor 1, and sucking atomized oil gas into the compressor 1. In the technical scheme, high-pressure refrigeration oil (also called lubricating oil) at an oil return port of the oil separator 5 enters a nozzle from a first inlet of the ejector 6 to reduce pressure and increase speed, a negative pressure area is generated around the nozzle, namely a second inlet sucks accumulated liquid in the evaporator 4 into the nozzle, and the return oil and the accumulated liquid are atomized at an outlet of the ejector 6 to enter the compressor 1, namely, the ejector 6 is adopted to replace a capillary tube of an air-conditioning refrigeration system in the prior art, the expansion work of throttling and reducing pressure during oil return is fully recycled, and meanwhile, the injection port (namely the second inlet) of the ejector 6 is utilized to suck and inject liquid (liquid refrigerant or refrigeration oil or a mixture of the liquid refrigerant and the refrigeration oil) in the evaporator 4, so that the system effectively overcomes the defect that the liquid storage phenomenon easily occurs at the bottom of the evaporator 4 while saving more energy, the liquid compression or suction liquid slugging phenomenon of the compressor 1 is prevented from occurring.
In some embodiments, a filter 71 is disposed between the first inlet of the ejector 6 and the oil return port of the oil separator 5, and is capable of filtering the return oil of the oil separator 5 to prevent impurities mixed therein from blocking the ejector 6.
A check valve 72 is disposed on a first pipeline between the second inlet (i.e., the injection port) of the ejector 6 and the gas collecting pipe 41 of the evaporator 4, so as to prevent high-pressure refrigerant oil or refrigerant gas from reversely flowing into the evaporator 4 through the ejector 6. Still be equipped with capillary 73 on the first pipeline, can be right effusion in the evaporimeter 4 realizes the throttle step-down, controls liquid volume through the capillary 73 of the suitable pipe diameter of establishing ties.
In some embodiments, the first pipeline includes an introducing pipe section communicated with the bottom of the gas collecting pipe 41, and the introducing pipe section extends above the bottom of the pipe to prevent impurities remaining at the bottom of the gas collecting pipe 41 from entering the liquid return pipe (i.e., the first pipeline) to cause blockage.
In some embodiments, a solenoid valve 74 is disposed on a pipeline between the outlet of the ejector 6 and the suction port of the compressor 1, and the solenoid valve 74 can be controlled to be opened or closed according to a specific design rule, so as to achieve control of oil return. For example, when the solenoid valve 74 is opened (i.e., turned on) according to the operation requirement of the system, the liquid in the evaporator 4 and/or the bottom of the gas collecting pipe 41 is atomized and returned to the compressor under the action of differential pressure suction, and when the air-conditioning refrigeration system is stopped or liquid return is not required, the solenoid valve 74 is controlled to be closed (i.e., turned off) to prevent the liquid from entering the compressor to cause suction liquid slugging or liquid compression.
The air-conditioning refrigeration system shown in fig. 1 is particularly suitable for air-conditioning in a precision machine room, and specifically, a compressor 1, an evaporator 4, a throttling element 3, an indoor fan and the like of the system are placed on an indoor unit (indoor side), a condenser 2, a corresponding outdoor fan and the like are placed on an outdoor unit (outdoor side), and the indoor unit and the outdoor unit are connected through a connecting pipe for use. Because the air conditioner of the precise machine room operates in a refrigeration working condition all the year round, the gas collecting pipe 41 of the evaporator 4 is very suitable for using the liquid return design scheme at the bottom of the gas collecting pipe 41, and the liquid return pipe assembly (namely the first pipeline) needs to be connected with a shorter pipeline flow, so that the pressure difference can be fully utilized. If the compressor is placed in the outdoor unit, the liquid return pipe needs to be connected to the outdoor unit from the indoor unit, namely an indoor and outdoor connecting pipe is added, the connecting pipe belongs to an engineering installation part, the length, the pipe arrangement and the like of the connecting pipe need to be flexibly designed according to the field, the liquid return pipe belongs to a precisely designed pipeline part, the length, the pipe diameter and the like cannot be randomly changed, and otherwise the liquid return effect can be influenced, so that the technical scheme is more suitable for a refrigerating system with the compressor and the evaporator arranged nearby. That is, in a preferred embodiment, the compressor 1 is on the indoor side.
According to an embodiment of the present invention, there is also provided a control method of an air conditioning refrigeration system, for controlling the air conditioning refrigeration system, including: acquiring a control instruction; and controlling the on-off of the electromagnetic valve 74 according to the control command. Specifically, when the control instruction is that the return oil is returned to the liquid and opened, the electromagnetic valve 74 is controlled to be switched on; when the control command is that the return oil and the return liquid stop, the electromagnetic valve 74 is controlled to be cut off.
Specifically, for example, when the air conditioning refrigeration system is started and operated, the electromagnetic valve 74 is opened as needed, so that the high-pressure refrigeration oil or refrigerant in the oil separator 5 enters the ejector 6 to reduce the pressure and increase the speed, and the liquid at the bottom of the gas collecting pipe 41 is sucked and ejected, and the two are mixed and then enter the gas suction pipe, and then completely mixed with the refrigerant gas returned by the gas collecting pipe 41 and enter the gas suction port of the compressor. The opening of the electromagnetic valve may require oil return, and may also require pumping the accumulated liquid at the bottom of the evaporator and the gas collecting pipe: high-pressure refrigerant gas at the oil separator 5 is used as a power source to enter the ejector 6, high-temperature and high-pressure refrigerant passes through the nozzle and then is accelerated and depressurized, and a negative pressure area is generated around the nozzle, so that accumulated liquid at the bottom of the suction gas collecting pipe 41 is ejected.
When the air-conditioning refrigeration system is shut down or oil return is not needed, the electromagnetic valve is closed, so that liquid can be prevented from entering the air suction pipe of the compressor. The check valve 72 prevents the high-pressure refrigerant oil or gas from flowing backward through the ejector 6 to the header 41 when the solenoid valve is closed.
When the refrigeration load is smaller, the compressor generally operates at low frequency, the circulating quantity of the refrigerant in the refrigeration system is smaller, and surplus refrigerant exists, so that the time interval between oil return and liquid return can be longer. However, when the low-frequency operation time is too long, the compressor may have an oil shortage problem, so that the high-frequency operation is performed to realize oil return; the surplus refrigerant at low frequency can accumulate at the bottom of the evaporator 4 and/or at the bottom of the header 41, since the solenoid valve 74 is closed and no flow to the compressor is possible, thereby ensuring proper refrigerant circulation amount at low frequency operation without excess. Therefore, the invention realizes the functions of liquid return and oil return at the same time, and is a better simplified control scheme for the air-conditioning refrigeration system.
When the solenoid valve is closed, the check valve 72 prevents the refrigerant oil separated in the oil separator 5 from entering the bottom of the header 41 through the capillary tube 73. At this time, the outlet of the check valve 72 is in a high pressure state (the capillary tube is not throttled when no fluid flows, and the inlet and the outlet of the capillary tube 73 are in a pressure balance state), and the inlet of the check valve 72 is in a low pressure state, so that the check valve 72 is in a reverse cut-off closing state, and no refrigerant or refrigeration oil flows.
A specific embodiment of the system configuration of the air conditioning refrigeration system of the present invention is described below with reference to fig. 1:
the compressor 1, the oil separator 5, the condenser 2, the expansion valve, and the evaporator 4 are connected in sequence to form a closed refrigeration cycle. The condenser 2 has a gas distribution pipe 21 and a liquid collection pipe 22, the evaporator 4 has a liquid distribution head 42, a liquid distribution branch pipe 43 and a gas collection pipe 41, an oil return line of the oil separator 5 is connected to a gas suction pipe of the compressor 1, and an electromagnetic valve 74 for controlling oil return is connected to the oil return line. A filter 71 is connected to an inlet pipeline between the oil return pipeline and the electromagnetic valve 74; the suction port of the compressor 1 is connected to a merging outlet of a fork 75 (merging tee), and two inlet ports of the fork 75 are connected to a suction pipe and an outlet of the solenoid valve 74, respectively.
An exhaust port of the compressor is connected to a gas distribution pipe 21 of the condenser 2 through an oil separator 5, the gas distribution pipe 21 distributes high-temperature and high-pressure refrigerant gas to each branch in the condenser 2 through a plurality of gas distribution branch pipes, phase change condensation and liquefaction are realized in the condenser 2, the high-temperature and high-pressure refrigerant gas is collected to a liquid collection pipe 22 through the liquid collection branch pipes, a main outlet of the liquid collection pipe 22 is connected to an inlet of an expansion valve, the high-pressure refrigerant is throttled, cooled and depressurized through the expansion valve, and an outlet of the expansion valve is connected to a liquid distribution head 42; the liquid distributing head 42 is connected with a plurality of incomplete same liquid distributing branch pipes 43, each liquid distributing branch pipe 43 distributes low-temperature and low-pressure refrigerant to each branch of the evaporator 4, phase change evaporation and gasification are realized in the evaporator 4, the refrigerant is collected to the gas collecting pipe 41 through the gas collecting branch pipes, the total outlet of the gas collecting pipe 41 is connected to the gas suction pipe, and the gas suction pipe is connected with the gas suction port of the compressor. A return line is connected to the return outlet of the oil separator 5 and is connected to the suction pipe via a solenoid valve 74. An ejector 6 is connected to a pipeline between an oil return outlet of the oil separator 5 and an inlet of the electromagnetic valve 74, an injection port (i.e., the second inlet) of the ejector 6 is communicated to the bottom of the gas collecting pipe 41 through a liquid return pipe (i.e., the first pipeline), and a capillary 73 and a one-way valve 72 are connected to the liquid return pipe in series.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides an air conditioner refrigerating system, includes compressor (1), condenser (2), throttling element (3), evaporimeter (4), compressor (1), condenser (2), throttling element (3), evaporimeter (4) are connected in order and are formed refrigeration cycle, its characterized in that still includes oil separator (5), oil separator (5) connect in the gas vent of compressor (1) with between the air inlet of condenser (2), still include sprayer (6), sprayer (6) can oil separator (5) the oil return with the effect of the pressure differential between the breathing in of compressor (1) will under the effect of the hydrops in evaporimeter (4) reaches oil separator (5) the oil return is in the exit of sprayer (6) atomizes.
2. An air conditioning refrigeration system according to claim 1, characterized in that a filter (71) is provided between the first inlet of the ejector (6) and the oil return of the oil separator (5).
3. Air-conditioning refrigeration system according to claim 1, characterized in that a one-way valve (72) is provided on the first line between the second inlet of the ejector (6) and the header (41) of the evaporator (4).
4. An air conditioning refrigeration system according to claim 3, characterized in that a capillary tube (73) is also provided on the first circuit.
5. An air-conditioning refrigeration system as recited in claim 3 wherein said first circuit includes an intake section communicating with the bottom of said header (41), said intake section extending above said bottom.
6. Air-conditioning refrigeration system according to any one of claims 1 to 5, characterized in that a solenoid valve (74) is provided on the line between the outlet of the ejector (6) and the suction inlet of the compressor (1).
7. Air conditioning refrigeration system according to claim 1, characterized in that the compressor (1) is on the indoor side.
8. A control method for an air conditioning refrigeration system, characterized by controlling the air conditioning refrigeration system of claim 6, comprising:
acquiring a control instruction;
and controlling the on-off of the electromagnetic valve (74) according to the control command.
9. The control method according to claim 8,
when the control instruction is that the oil return liquid is opened, controlling the electromagnetic valve (74) to be conducted;
and when the control instruction is oil return and liquid return stop, the electromagnetic valve (74) is controlled to be cut off.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210248931.8A CN114484945A (en) | 2022-03-14 | 2022-03-14 | Air conditioner refrigeration system and control method thereof |
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| CN202210248931.8A CN114484945A (en) | 2022-03-14 | 2022-03-14 | Air conditioner refrigeration system and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992929A (en) * | 2022-06-08 | 2022-09-02 | 珠海格力电器股份有限公司 | Dual-mode refrigeration system and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201583062U (en) * | 2009-12-21 | 2010-09-15 | 于奎明 | Coating-type ground source heat pump unit |
| CN203857703U (en) * | 2014-05-23 | 2014-10-01 | 青岛海尔空调电子有限公司 | Refrigerating system |
| CN106679227A (en) * | 2015-11-09 | 2017-05-17 | 苏州三星电子有限公司 | Spraying refrigerating circulation system with automatic oil return function |
| GB2578254B (en) * | 2017-08-04 | 2021-09-01 | Mitsubishi Electric Corp | Refrigeration cycle apparatus and heat source unit |
| CN113944964A (en) * | 2021-10-28 | 2022-01-18 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN217110102U (en) * | 2022-03-14 | 2022-08-02 | 珠海格力电器股份有限公司 | Air-conditioning refrigeration system |
-
2022
- 2022-03-14 CN CN202210248931.8A patent/CN114484945A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201583062U (en) * | 2009-12-21 | 2010-09-15 | 于奎明 | Coating-type ground source heat pump unit |
| CN203857703U (en) * | 2014-05-23 | 2014-10-01 | 青岛海尔空调电子有限公司 | Refrigerating system |
| CN106679227A (en) * | 2015-11-09 | 2017-05-17 | 苏州三星电子有限公司 | Spraying refrigerating circulation system with automatic oil return function |
| GB2578254B (en) * | 2017-08-04 | 2021-09-01 | Mitsubishi Electric Corp | Refrigeration cycle apparatus and heat source unit |
| CN113944964A (en) * | 2021-10-28 | 2022-01-18 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN217110102U (en) * | 2022-03-14 | 2022-08-02 | 珠海格力电器股份有限公司 | Air-conditioning refrigeration system |
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| CN114992929A (en) * | 2022-06-08 | 2022-09-02 | 珠海格力电器股份有限公司 | Dual-mode refrigeration system and control method thereof |
| CN114992929B (en) * | 2022-06-08 | 2023-09-12 | 珠海格力电器股份有限公司 | Dual-mode refrigerating system and control method thereof |
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