CN105241134B - Gas-liquid separator, air conditioning system and operation method of air conditioning system - Google Patents
Gas-liquid separator, air conditioning system and operation method of air conditioning system Download PDFInfo
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- CN105241134B CN105241134B CN201510675456.2A CN201510675456A CN105241134B CN 105241134 B CN105241134 B CN 105241134B CN 201510675456 A CN201510675456 A CN 201510675456A CN 105241134 B CN105241134 B CN 105241134B
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- 239000007788 liquid Substances 0.000 title claims abstract description 258
- 238000004378 air conditioning Methods 0.000 title claims description 61
- 238000000034 method Methods 0.000 title claims description 10
- 239000003507 refrigerant Substances 0.000 claims abstract description 186
- 238000004781 supercooling Methods 0.000 claims abstract description 56
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000007599 discharging Methods 0.000 claims abstract description 8
- 238000005057 refrigeration Methods 0.000 claims description 13
- 238000013021 overheating Methods 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009491 slugging Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a gas-liquid separator, comprising: the outer shell and the inner container respectively form a closed space, the inner container is positioned in the outer shell, a supercooling channel is formed in the space between the outer shell and the inner container, a superheating channel is formed in the space in the inner container, the superheating channel is provided with an air inlet pipe for introducing refrigerant steam and an air outlet pipe for discharging the refrigerant steam out of the gas-liquid separator, the supercooling channel is provided with a liquid inlet pipe for introducing refrigerant liquid and a liquid outlet pipe for discharging the refrigerant liquid out of the gas-liquid separator, and the refrigerant liquid in the supercooling channel and the refrigerant steam in the superheating channel perform heat exchange. The refrigerant liquid with higher temperature and the refrigerant steam with lower temperature respectively flow in the two spaces and exchange heat, and the supercooling degree of the refrigerant liquid and the superheat degree of the refrigerant steam can be improved, so that the heating/cooling capacity of the refrigerant in unit mass is improved, the suction superheat degree and the oil temperature superheat degree of the compressor are improved, the liquid impact possibility is reduced, and the reliability of the compressor is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a gas-liquid separator, an air conditioning system comprising the gas-liquid separator and an operation method of the air conditioning system.
Background
In the refrigeration state of the air conditioning unit, a refrigerant is compressed by a compressor and converted into high-temperature and high-pressure gas, the high-temperature and high-pressure gas enters an outdoor heat exchanger (condenser) through a four-way valve, the high-temperature and high-pressure gas is converted into medium-temperature and high-pressure liquid after the heat absorption and the heat release of the condenser, the medium-temperature and high-pressure liquid is converted into low-temperature and low-pressure liquid after passing through an expansion valve, the low-temperature and low-pressure gas is converted into. The air conditioning unit changes the flow direction of a refrigerant through the four-way valve in a heating state, the refrigerant is compressed by the compressor to be converted into high-temperature and high-pressure gas, the high-temperature and high-pressure gas enters the indoor heat exchanger (condenser) through the four-way valve, the high-temperature and high-pressure liquid is converted into medium-temperature and high-pressure liquid after the condenser absorbs and releases heat, the low-temperature and low-pressure liquid is converted into low-temperature and low-pressure gas after the low-temperature and high-pressure liquid passes through the expansion valve.
At present, the methods for realizing supercooling of the air conditioning unit mainly comprise the following steps: 1. the supercooling section is added in the condenser, so that the volume of the condenser and the occupied space of the whole machine can be increased, and the requirement of a client on small volume of the air conditioner is not met; in addition, supercooling is realized by adding a supercooling section (such as a plate heat exchanger) so as to increase the material cost and the processing cost; 2. the high-pressure liquid storage tank is added behind the condenser to store more refrigerants, and compensation can be performed when the unit lacks refrigerants, but the refrigerant supercooling is not performed by the method, so that the energy efficiency cannot be improved; 3. as shown in fig. 1, an air conditioning unit of the prior art is provided with a gas-liquid separator, wherein the gas-liquid separator is installed between an evaporator and a compressor, superheated refrigerant vapor discharged from the gas-liquid separator 100 is sucked into the compressor 200, compressed to form high-temperature and high-pressure gas, and enters a condenser 300 for heat exchange, and condensed to form high-pressure and medium-temperature refrigerant liquid, and then the refrigerant liquid enters a supercooling passage of the gas-liquid separator 100 to form supercooled refrigerant liquid, and then is discharged from the gas-liquid separator 100, and then flows through a throttle valve 400 for throttling, the throttled refrigerant forming low-pressure and low-temperature gas-liquid two-phase refrigerant enters the evaporator 500, and is evaporated in the evaporator to form refrigerant vapor, and the refrigerant vapor enters a superheating passage of the gas-liquid separator 100 to form superheated refrigerant vapor and then is discharged from the gas-liquid separator 100, and then is sucked into the compressor 200 again, thereby implementing the entire cooling/heating cycle. However, the method of supercooling the refrigerant by the gas-liquid separator cannot effectively achieve both the cooling and heating modes of the unit.
Disclosure of Invention
The invention aims to provide a gas-liquid separator which is applied to an air conditioning system and can realize supercooling of a refrigerant.
Another object of the present invention is to provide a gas-liquid separator, which can be used in an air conditioning system to store liquid refrigerant.
It is still another object of the present invention to provide a gas-liquid separator which is used in an air conditioning system to increase the degree of superheat of suction gas of a compressor and reduce the possibility of liquid hammering.
Another object of the present invention is to provide a gas-liquid separator that can be applied to an air conditioning system and can effectively achieve both cooling and heating modes of a unit.
Still another object of the present invention is to provide a gas-liquid separator having a simple structure and high operability.
The invention also aims to provide an air conditioning system which can effectively solve the problems of low suction superheat degree of a compressor, low supercooling degree of a refrigerant, insufficient supplement of the refrigerant and the like of the conventional air conditioning system.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, there is provided a gas-liquid separator comprising: the gas-liquid separator comprises a shell and an inner container, wherein the shell and the inner container are respectively formed into a closed space, the inner container is positioned in the shell, a supercooling channel is formed in the space between the shell and the inner container, a superheating channel is formed in the space in the inner container, the superheating channel is provided with an air inlet pipe for introducing refrigerant steam and an air outlet pipe for discharging the refrigerant steam out of the gas-liquid separator, the supercooling channel is provided with a liquid inlet pipe for introducing refrigerant liquid and a liquid outlet pipe for discharging the refrigerant liquid out of the gas-liquid separator, and the refrigerant liquid in the supercooling channel and the refrigerant steam in the superheating channel are subjected to heat exchange.
Preferably, the liquid inlet pipe has a first inlet and a second inlet through which refrigerant liquid in a cooling/heating mode passes, respectively.
In another aspect, there is provided an air conditioning system including: the indoor unit comprises a first heat exchanger, the outdoor unit comprises a second heat exchanger, a compressor, a gas-liquid separator and a four-way valve, the first heat exchanger is provided with a first medium port and a second medium port, the second heat exchanger is provided with a third medium port and a fourth medium port, the compressor is provided with a compressor inlet and a compressor outlet, the compressor inlet is connected with an air outlet pipe of the gas-liquid separator, the compressor outlet is connected with the four-way valve, an air inlet pipe of the gas-liquid separator is connected with the four-way valve, the first medium port is connected with the four-way valve, and the third medium port is connected with the four-way valve;
the liquid level meter is characterized by further comprising a first branch, a second branch, a third branch and a fourth branch, wherein the first branch is connected with the second medium port and the liquid outlet pipe, the second branch is connected with the fourth medium port and the first inlet, the third branch is connected with the fourth medium port and the liquid outlet pipe, the fourth branch is connected with the second medium port and the second inlet, and electromagnetic valves are arranged on the first branch, the second branch, the third branch and the fourth branch and used for controlling the on-off of the branches.
On the other hand, the operation method of the air conditioning system is also provided, when the air conditioning system is in a refrigeration mode, the first branch and the second branch are controlled to be conducted, the third branch and the fourth branch are blocked, the refrigerant sucked into the compressor is compressed and then flows through the four-way valve, enters the second heat exchanger for heat exchange, the refrigerant liquid discharged by the second heat exchanger enters the supercooling channel of the gas-liquid separator from the second branch and the first inlet of the liquid inlet pipe, and exchanges heat with the refrigerant steam in the gas-liquid separator to realize the supercooling of the refrigerant liquid, the refrigerant liquid after heat exchange is discharged from the liquid outlet pipe, enters the first heat exchanger for heat exchange through the first branch, the refrigerant steam discharged by the first heat exchanger flows through the four-way valve, enters the superheat channel of the gas-liquid separator from the air inlet pipe, and exchanges heat with the refrigerant liquid in the gas-liquid separator, the refrigerant steam is superheated, the refrigerant steam after heat exchange is discharged from the air outlet pipe and is sucked into the compressor again, and the refrigeration cycle of the air conditioning system is realized; or,
when the air conditioning system is in a heating mode, the first branch and the second branch are controlled to be blocked, the third branch and the fourth branch are conducted, a refrigerant sucked into the compressor is compressed and then flows through the four-way valve to enter the first heat exchanger for heat exchange, refrigerant liquid discharged by the first heat exchanger enters the supercooling channel of the gas-liquid separator from the fourth branch and the second inlet of the liquid inlet pipe to exchange heat with refrigerant steam in the gas-liquid separator, supercooling of the refrigerant liquid is realized, the refrigerant liquid after heat exchange is discharged from the liquid outlet pipe and enters the second heat exchanger for heat exchange through the third branch, the refrigerant steam discharged by the second heat exchanger flows through the four-way valve to enter the overheating channel of the gas-liquid separator from the air inlet pipe to exchange heat with the refrigerant liquid in the gas-liquid separator, overheating of the refrigerant steam is realized, and the refrigerant steam after heat exchange is discharged from the air outlet pipe, and is sucked into the compressor again to realize the heating cycle of the air conditioning system.
The invention has the beneficial effects that: according to the gas-liquid separator, the shell and the inner container are arranged, the overheating channel for the refrigerant steam to pass through is formed in the inner container, and the supercooling channel for the refrigerant liquid to pass through is formed in the space between the shell and the inner container, so that the refrigerant liquid with higher temperature and the refrigerant steam with lower temperature respectively flow in two spaces and exchange heat, the supercooling degree of the refrigerant liquid and the superheat degree of the refrigerant steam can be improved, the heating quantity/refrigerating quantity of the refrigerant in unit mass is improved, the suction superheat degree and the oil temperature superheat degree of the compressor are improved, the possibility of liquid impact is reduced, and the reliability of the compressor is improved; the structure of the gas-liquid separator is simpler, the cost can be reduced compared with the traditional heat exchange mode of the supercooling pipe, and convenience is brought to disassembly and assembly.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioning unit disclosed in the prior art;
FIG. 2 is a schematic structural view of a gas-liquid separator provided in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a liquid inlet pipe of a gas-liquid separator provided in an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an air conditioning system according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the operation of the refrigeration cycle of the air conditioning system provided by the embodiment of the present invention;
FIG. 6 is a schematic diagram of the operation of a heating cycle of an air conditioning system according to an embodiment of the present invention;
FIG. 7 is a flow chart of a refrigeration system of an air conditioning system according to an embodiment of the present invention;
fig. 8 is a flow chart of a heating system of an air conditioning system according to an embodiment of the present invention.
In the figure:
100. a gas-liquid separator; 200. a compressor; 300. a condenser; 400. a throttle valve; 500. an evaporator;
1. a gas-liquid separator; 11. a housing; 12. an inner container; 13. an air inlet pipe; 14. an air outlet pipe; 141. a liquid return pipe; 15. a liquid inlet pipe; 151. a first inlet; 152. a second inlet; 153. a third inlet; 154. a first branch pipe; 155. a second branch pipe; 16. a liquid outlet pipe; 17. a liner support;
2. an indoor unit; 21. a first heat exchanger; 211. a first media port; 212. a second media port;
3. an outdoor unit; 31. a second heat exchanger; 311. a third media port; 312. a fourth media port; 32. a compressor; 321. a compressor inlet; 322. a compressor outlet; 33. a four-way valve; 34. an electronic expansion valve; 35. a first branch; 36. a second branch circuit; 37. a third branch; 38. a fourth branch; 39. an electromagnetic valve; 40. a first filter; 41. a second filter.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Fig. 2 is a schematic structural diagram of a gas-liquid separator according to an embodiment of the present invention. Referring to fig. 2, the present invention provides a gas-liquid separator 1 comprising: the refrigerator comprises a shell 11 and an inner container 12, wherein the shell 11 and the inner container 12 respectively form a closed space, the inner container 12 is positioned in the shell 11, a supercooling channel is formed in the space between the shell 11 and the inner container 12, a superheating channel is formed in the space in the inner container 12, the superheating channel is provided with an air inlet pipe 13 used for introducing refrigerant steam and an air outlet pipe 14 used for discharging the refrigerant steam out of the gas-liquid separator 1, the supercooling channel is provided with a liquid inlet pipe 15 used for introducing refrigerant liquid and a liquid outlet pipe 16 used for discharging the refrigerant liquid out of the gas-liquid separator 1, and the refrigerant liquid in the supercooling channel exchanges heat with the refrigerant steam.
According to the invention, the shell 11 and the inner container 12 are arranged, the inner container 12 is internally provided with the overheating channel for refrigerant steam to pass through, and the space between the shell 11 and the inner container 12 is provided with the supercooling channel for refrigerant liquid to pass through, so that the refrigerant liquid with higher temperature and the refrigerant steam with lower temperature exchange heat, the supercooling degree of the refrigerant liquid and the superheat degree of the refrigerant steam can be improved, the heating quantity/refrigerating capacity of the refrigerant of unit mass is improved, the suction superheat degree and the oil temperature superheat degree of the compressor are improved, the possibility of liquid slugging is reduced, and the reliability of the compressor is improved. The gas-liquid separator adopts the refrigerant liquid to directly flow in the space between the shell 11 and the inner container 12 and exchange heat with the refrigerant steam flowing in the inner container 12, and the heat exchange structure is of two independent integral structures; in the gas-liquid separator in the prior art, refrigerant liquid flows in the supercooling pipe and exchanges heat with refrigerant steam in the air pipe, a plurality of supercooling pipes are required to be arranged, and in addition, the supercooling pipes are required to be designed into a tortuous structure.
In some embodiments of the present invention, the liquid inlet pipe 15 has a first inlet 151 and a second inlet 152 for passing the refrigerant liquid in the cooling/heating mode, respectively. The air conditioning unit has a cooling/heating mode during operation, the refrigerant flow direction is different in the cooling/heating mode, and the time of entering the gas-liquid separator is also different, for example, in the cooling mode, the liquid refrigerant discharged by the condenser enters the gas-liquid separator to realize the refrigerant supercooling, and in the heating mode, the liquid refrigerant discharged by the evaporator enters the gas-liquid separator to realize the refrigerant supercooling, so that the pipeline structures of the refrigerant supercooling in the cooling/heating mode are different.
The liquid inlet pipe 15 further includes a third inlet 153 for introducing the refrigerant liquid flowing into the first inlet 151 or the second inlet 152 into the supercooling channel, the third inlet 153 is disposed in the housing 11 and near the upper portion of the inner container 12, and the refrigerant liquid flowing through the third inlet 153 may spray the inner container 12 from top to bottom and exchange heat with the refrigerant vapor in the inner container 12. It will be understood by those skilled in the art that the third inlet 153 of the present invention is located above the inner container 12, including right above, obliquely above, etc., and is suitable for the present invention as long as it can perform heat exchange with the inner container 12 by spraying. Preferably, the third inlet 153 is disposed right above the top center position of the inner container 12. In the invention, the third inlet 153 is arranged above the inner container 12, so that the refrigerant liquid can directly spray the inner container to complete heat exchange, and compared with the structure that the liquid equalizing pipe is arranged in the prior art to distribute the refrigerant liquid into the supercooling pipe for heat exchange, the structure of the invention is obviously simpler and more feasible and is easy to implement.
As an example of the present invention, fig. 3 shows a structure of the liquid inlet pipe, and as shown in fig. 3, the liquid inlet pipe 15 includes a first branch pipe 154 and a second branch pipe 155 connected to each other, the first branch pipe 154 has two nozzles as a first inlet 151 and a second inlet 152, respectively, and the second branch pipe 155 has two nozzles, one of which is in communication with the first branch pipe 154 and the other is a third inlet 153. The first inlet 151 and the third inlet 153, and the second inlet 152 and the third inlet 153 are selectively communicated or blocked, so that the refrigerant liquid introduced from the first inlet 151 or the second inlet 152 can flow into the supercooling channel through the third inlet 153, and the heat exchange efficiency is improved. There are various ways to achieve the above selective communication or blocking, for example, a three-way valve is disposed at the junction of the first branch pipe and the second branch pipe; for another example, two stop valves are arranged in the first branch pipe.
The liquid inlet pipe 15 of the present invention is disposed near the upper end of the housing 11, and the liquid outlet pipe 16 is disposed near the lower end of the housing 11. The liquid inlet pipe 15 penetrates through the top cover of the shell 11 and extends to the upper part of the inner container 12, and the liquid outlet pipe 16 penetrates through the side wall of the shell 11, so that the refrigerant liquid in the supercooling channel in the shell 11 can be smoothly discharged. The liquid inlet pipe 15 and the liquid outlet pipe 16 of the invention can be made of materials such as copper pipes, and can be fixedly connected with the shell 11 by welding and the like.
In some embodiments of the present invention, both the air inlet pipe 13 and the air outlet pipe 14 of the overheating channel may extend from the outside of the housing 11 to the inside of the inner container 12, so as to form a gas-liquid separation space in the inner container 12. The refrigerant vapor introduced from the inlet pipe 13 is heated after heat exchange to form dry gas, and the dry gas is sucked into the compressor from the outlet pipe 14.
Preferably, the pipe orifice of the air inlet pipe 13 in the inner container 12 and the pipe orifice of the air outlet pipe 14 in the inner container 12 are staggered in the horizontal direction, and the staggered distance is preferably greater than 50 mm. The mouth of the air outlet pipe 14 in the inner container 12 is arranged above the mouth of the air inlet pipe 13 in the inner container 12, and the height difference between the two is preferably more than 50 mm. The design aims at enabling the refrigerant steam introduced by the air inlet pipe 13 to be fully heated, enabling the liquid state to be converted into the gaseous state, and then introducing the gaseous state into the air outlet pipe, so as to avoid the liquid impact condition. The pipe orifice of the air outlet pipe 14 in the inner container 12 forms an oblique cut of 20-40 degrees, preferably 30 degrees, relative to the horizontal plane.
Preferably, the air outlet pipe 14 is a U-shaped pipe structure, and one or more liquid return holes or liquid return pipes 141 are arranged at the bottom of the U-shaped pipe structure, so that the incompletely evaporated liquid entering the U-shaped pipe structure can enter the bottom of the inner container 12 of the gas-liquid separator through the liquid return holes or the liquid return pipes 141, so as to achieve the purpose of storing more refrigerant liquid, and can be supplemented in time when the unit lacks a refrigerant. The aperture of the liquid return hole or the inner diameter of the liquid return pipe 141 is 3-4 mm, and the number of the liquid return holes or the liquid return pipes can be determined according to actual needs.
The inlet pipe 13 and the outlet pipe 14 can be made of a material such as a copper pipe, and can be fixedly connected with the shell 11 and/or the inner container 12 by welding or the like.
The inner container 12 is fixed in the casing 11 by a container bracket 17. The liner support 17 can be welded and fixed in the shell 11 in advance, and then the liner 12 and the liner support 17 are fixed in a welding, clamping and other modes. Of course, it will be understood by those skilled in the art that the above assembling and fixing manners are only one specific implementation manner, and the present invention is not limited thereto.
Fig. 4 is a schematic structural diagram of an air conditioning system according to an embodiment of the present invention. As shown in fig. 4, the air conditioning system according to the present invention includes: the indoor unit 2 and the outdoor unit 3, the indoor unit 2 includes a first heat exchanger 21, the outdoor unit 3 includes a second heat exchanger 31, a compressor 32, a gas-liquid separator 1, a four-way valve 33 and an electronic expansion valve 34, the first heat exchanger 21 has a first medium port 211 and a second medium port 212, the second heat exchanger 31 has a third medium port 311 and a fourth medium port 312, the compressor 32 has a compressor inlet 321 and a compressor outlet 322, the compressor inlet 321 is connected with the gas outlet pipe 14 of the gas-liquid separator 1, the compressor outlet 322 is connected with the four-way valve 33, the gas inlet pipe 13 of the gas-liquid separator 1 is connected with the four-way valve 33, the first medium port 211 is connected with the four-way valve 33, and the;
the device also comprises a first branch 35, a second branch 36, a third branch 37 and a fourth branch 38, wherein the first branch 35 is connected with the second medium port 212 and the liquid outlet pipe 16, the second branch 36 is connected with the fourth medium port 312 and the first inlet 151, the third branch 37 is connected with the fourth medium port 312 and the liquid outlet pipe 16, the fourth branch 38 is connected with the second medium port 212 and the second inlet 152, and electromagnetic valves 39 are arranged on the first branch 35, the second branch 36, the third branch 37 and the fourth branch 38 and used for controlling the on-off of the branches.
The air conditioning system provided by the invention is matched with the gas-liquid separator by arranging four branches capable of controlling on-off, so that the refrigeration/heating mode of the air conditioning system can be effectively considered. When the air conditioning system is in a cooling mode, the first branch 35 and the second branch 36 are controlled to be communicated, the third branch 37 and the fourth branch 38 are blocked, refrigerant liquid flowing out of the fourth medium port 312 of the second heat exchanger 31 enters the gas-liquid separator 1 through the first inlet 151, and exchanges heat with refrigerant steam in the gas-liquid separator 1, so that supercooling of the refrigerant and suction superheat degree of the compressor 32 are realized; when the air conditioning system is in a heating mode, the first branch 35 and the second branch 36 are controlled to be blocked, the third branch 37 and the fourth branch 38 are conducted, refrigerant liquid flowing out of the second medium port 212 of the first heat exchanger 21 enters the gas-liquid separator 1 through the second inlet 152, and exchanges heat with refrigerant steam in the gas-liquid separator 1, so that supercooling of the refrigerant and suction superheat of the compressor 32 are realized.
Specifically, the four-way valve 33 includes A, B, C, D four ports, the first medium port 211 is connected to the port B, the compressor outlet 322 is connected to the port a, the third medium port 311 is connected to the port D, and the intake pipe 13 is connected to the port C. When the refrigerator is in a refrigeration mode, the valve port A is communicated with the valve port D, and the valve port B is communicated with the valve port C; when the heating device is in a heating mode, the valve port A is communicated with the valve port B, and the valve port C is communicated with the valve port D.
Preferably, a first filter 40, an electronic expansion valve 34 and a second filter 41 are sequentially arranged between the liquid outlet pipe 16 and the first branch 35 or the third branch 37. The refrigerant liquid is filtered and throttled before entering the first heat exchanger 21 or the second heat exchanger 31, and the stability and the efficiency of the system are further improved.
Of course, it can be understood by those skilled in the art that the air conditioning system of the present invention further includes a blower and other components, which are not described herein in detail since they are not improvements of the present invention.
An embodiment of the present invention further provides an operation method of an air conditioning system, and fig. 5 is a working schematic diagram of a refrigeration cycle of the air conditioning system provided in the embodiment of the present invention. As shown in fig. 5, when the air conditioning system is in the cooling mode, the first branch and the second branch are controlled to be conducted, the third branch and the fourth branch are blocked, the refrigerant sucked into the compressor is compressed and then flows through the four-way valve, enters the second heat exchanger for heat exchange, the refrigerant liquid discharged by the second heat exchanger enters the supercooling channel of the gas-liquid separator from the second branch and the first inlet of the liquid inlet pipe, exchanges heat with the refrigerant vapor in the gas-liquid separator to realize supercooling of the refrigerant liquid, the refrigerant liquid after heat exchange is discharged from the liquid outlet pipe, enters the first heat exchanger through the first branch for heat exchange, the refrigerant vapor discharged by the first heat exchanger flows through the four-way valve and enters the superheating channel of the gas-liquid separator from the air inlet pipe to exchange heat with the refrigerant liquid in the gas-liquid separator to realize superheating of the refrigerant vapor, and the refrigerant vapor after heat exchange is discharged from the air outlet pipe, is sucked into the compressor again to realize the refrigeration cycle of the air conditioning system.
Fig. 6 is a schematic diagram of a heating cycle of an air conditioning system according to an embodiment of the present invention. As shown in fig. 6, when the air conditioning system is in the heating mode, the first branch and the second branch are controlled to be blocked, the third branch and the fourth branch are conducted, the refrigerant sucked into the compressor is compressed and then flows through the four-way valve, and enters the first heat exchanger for heat exchange, the refrigerant liquid discharged by the first heat exchanger enters the supercooling channel of the gas-liquid separator from the fourth branch and the second inlet of the liquid inlet pipe, and exchanges heat with the refrigerant vapor in the gas-liquid separator, so as to realize supercooling of the refrigerant liquid, the refrigerant liquid after heat exchange is discharged from the liquid outlet pipe, and enters the second heat exchanger for heat exchange through the third branch, the refrigerant vapor discharged by the second heat exchanger flows through the four-way valve, enters the superheating channel of the gas-liquid separator from the air inlet pipe, exchanges heat with the refrigerant liquid in the gas-liquid separator, so as to realize superheating of the refrigerant vapor, and the refrigerant vapor after heat exchange is discharged, and is sucked into the compressor again to realize the heating cycle of the air conditioning system.
Fig. 7 is a flow chart of a refrigeration system of an air conditioning system according to an embodiment of the present invention. Specifically, as shown in fig. 7, when the air conditioning system is in the cooling mode, the valve port a of the four-way valve 33 is connected to the valve port D, the valve port B is connected to the valve port C, the solenoid valves of the first branch 35 and the second branch 36 are opened to connect the two branches, the solenoid valves of the third branch 37 and the fourth branch 38 are closed to disconnect the two branches, the refrigerant sucked into the compressor 32 is compressed and then output from the compressor outlet 322, flows through the valve port a and the valve port D of the four-way valve 33, enters the second heat exchanger 31 through the third medium port 311 to exchange heat, the refrigerant liquid after heat exchange enters the second branch 36 from the fourth medium port 312, enters the subcooling passage of the gas-liquid separator 1 from the first inlet 151 to exchange heat with the refrigerant vapor in the gas-liquid separator 1, thereby subcooling the refrigerant liquid, and the refrigerant liquid after heat exchange sequentially passes through the first filter 40 and the second filter 40 from the outlet, The electronic expansion valve 39 and the second filter 41 enter the first branch path 35, and enter the first heat exchanger 21 from the second medium port 212 for heat exchange, the refrigerant vapor after heat exchange flows through the valve port B and the valve port C of the four-way valve 33 from the first medium port 211, enters the superheat channel of the gas-liquid separator 1 from the air inlet pipe 13, and exchanges heat with the refrigerant liquid in the gas-liquid separator 1, thereby realizing the superheat of the refrigerant vapor, the refrigerant vapor after heat exchange is output by the air outlet pipe 14, and is sucked into the compressor 32 again from the compressor inlet 321, thereby realizing the refrigeration cycle of the air conditioning system.
Fig. 8 is a flow chart of a heating system of an air conditioning system according to an embodiment of the present invention. Specifically, as shown in fig. 8, when the air conditioning system is in the heating mode, the valve port a of the four-way valve 33 is connected to the valve port B, the valve port D is connected to the valve port C, the solenoid valves of the first branch 35 and the second branch 36 are closed to block the two branches, the solenoid valves of the third branch 37 and the fourth branch 38 are opened to connect the two branches, the refrigerant sucked into the compressor 32 is compressed and then output from the compressor outlet 322, flows through the valve port a and the valve port B of the four-way valve 33, enters the first heat exchanger 21 through the first medium port 211 for heat exchange, enters the fourth branch 38 through the second medium port 212, enters the subcooling passage of the gas-liquid separator 1 from the second inlet 152, and exchanges heat with the refrigerant vapor in the gas-liquid separator 1 to subcool the refrigerant liquid, and the refrigerant liquid after heat exchange sequentially passes through the first filter 40 and the liquid outlet 16, The electronic expansion valve 39 and the second filter 41 enter the third branch 37, and enter the second heat exchanger 31 from the fourth medium port 312 for heat exchange, the refrigerant vapor after heat exchange flows through the valve port D and the valve port C of the four-way valve 33 from the third medium port 311, enters the superheat channel of the gas-liquid separator 1 from the air inlet pipe 13, and exchanges heat with the refrigerant liquid in the gas-liquid separator 1, thereby realizing the superheat of the refrigerant vapor, the refrigerant vapor after heat exchange is output by the air outlet pipe 14, and is sucked into the compressor 32 again from the compressor inlet 321, thereby realizing the heating cycle of the air conditioning system.
In the description herein, references to the description of the terms "some embodiments," "examples," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (9)
1. A gas-liquid separator, comprising: the shell (11) and the inner container (12) respectively form a closed space, and the inner container (12) is positioned in the shell (11);
a space between the shell (11) and the inner container (12) forms a supercooling channel, and the supercooling channel is provided with a liquid inlet pipe (15) for introducing refrigerant liquid and a liquid outlet pipe (16) for discharging the refrigerant liquid out of the gas-liquid separator;
a space in the inner container (12) forms a superheat channel, and the superheat channel is provided with an air inlet pipe (13) for introducing refrigerant steam and an air outlet pipe (14) for discharging the refrigerant steam out of the gas-liquid separator;
the refrigerant liquid in the supercooling channel exchanges heat with the refrigerant steam in the superheating channel;
the liquid inlet pipe (15) is provided with a first inlet (151) and a second inlet (152) through which refrigerant liquid in a cooling/heating mode passes respectively; the liquid inlet pipe (15) further comprises a third inlet (153) for introducing the refrigerant liquid flowing into the first inlet (151) or the second inlet (152) into the supercooling passage;
the air inlet pipe (13) and the air outlet pipe (14) both extend from the outside of the shell (11) to the inside of the inner container (12).
2. The gas-liquid separator according to claim 1, wherein the third inlet (153) is disposed in the housing (11) and near above the inner container (12), and the refrigerant liquid flowing through the third inlet (153) sprays the inner container (12) from top to bottom and exchanges heat with the refrigerant vapor in the inner container (12).
3. The gas-liquid separator of claim 1,
the pipe orifice of the air inlet pipe (13) in the inner container (12) and the pipe orifice of the air outlet pipe (14) in the inner container (12) are staggered along the horizontal direction.
4. The gas-liquid separator according to claim 3, wherein the orifice of said outlet duct (14) in said inner container (12) is arranged above the orifice of said inlet duct (13) in said inner container (12).
5. The gas-liquid separator according to claim 3, wherein said outlet duct (14) is a U-shaped tubular structure, and one or more liquid return holes or tubes (141) are provided in the bottom of the U-shaped tubular structure.
6. An air conditioning system comprising: an indoor unit (2) and an outdoor unit (3);
the indoor unit (2) comprises a first heat exchanger (21), and the first heat exchanger (21) is provided with a first medium port (211) and a second medium port (212);
the outdoor unit (3) comprises a second heat exchanger (31), a compressor (32) and a four-way valve (33); the second heat exchanger (31) has a third medium port (311) and a fourth medium port (312), the compressor (32) has a compressor inlet (321) and a compressor outlet (322);
characterized in that the outdoor unit (3) further comprises:
the gas-liquid separator (1) according to claim 2 or 3, wherein the compressor inlet (321) is connected to the gas outlet pipe (14) of the gas-liquid separator (1), the compressor outlet (322) is connected to the four-way valve (33), the gas inlet pipe (13) of the gas-liquid separator (1) is connected to the four-way valve (33), the first medium port (211) is connected to the four-way valve (33), and the third medium port (311) is connected to the four-way valve (33);
a first branch (35), the first branch (35) connecting the second medium port (212) and the liquid outlet pipe (16);
a second branch (36), said second branch (36) connecting said fourth medium port (312) with said first inlet (151);
a third branch 37, wherein the third branch 37 connects the fourth medium port 312 with the liquid outlet pipe 16;
a fourth branch 38, said fourth branch (38) connecting said second medium port (212) with said second inlet port (152);
and the first branch (35), the second branch (36), the third branch (37) and the fourth branch (38) are respectively provided with an electromagnetic valve (39) for controlling the on-off of each branch.
7. The air conditioning system as claimed in claim 6, wherein the four-way valve (33) has A, B, C, D four ports, the first medium port (211) is connected to the port B, the compressor outlet (322) is connected to the port A, the third medium port (311) is connected to the port D, and the intake pipe (13) is connected to the port C.
8. An operation method of an air conditioning system according to claim 6, wherein when the air conditioning system is in a cooling mode, the first branch and the second branch are controlled to be conducted, the third branch and the fourth branch are blocked, a refrigerant sucked into the compressor is compressed and then flows through the four-way valve, enters the second heat exchanger for heat exchange, a refrigerant liquid discharged from the second heat exchanger enters the supercooling channel of the gas-liquid separator from the second branch and the first inlet of the liquid inlet pipe, and exchanges heat with refrigerant vapor in the gas-liquid separator, so as to realize supercooling of the refrigerant liquid, the refrigerant liquid after heat exchange is discharged from the liquid outlet pipe, enters the first heat exchanger through the first branch for heat exchange, the refrigerant vapor discharged from the first heat exchanger flows through the four-way valve, enters the superheating channel of the gas-liquid separator from the gas inlet pipe, and exchanges heat with the refrigerant liquid in the gas-liquid separator, the refrigerant steam is superheated, the refrigerant steam after heat exchange is discharged from the air outlet pipe and is sucked into the compressor again, and the refrigeration cycle of the air conditioning system is realized; or,
when the air conditioning system is in a heating mode, the first branch and the second branch are controlled to be blocked, the third branch and the fourth branch are conducted, a refrigerant sucked into the compressor is compressed and then flows through the four-way valve to enter the first heat exchanger for heat exchange, refrigerant liquid discharged by the first heat exchanger enters the supercooling channel of the gas-liquid separator from the fourth branch and the second inlet of the liquid inlet pipe to exchange heat with refrigerant steam in the gas-liquid separator, supercooling of the refrigerant liquid is realized, the refrigerant liquid after heat exchange is discharged from the liquid outlet pipe and enters the second heat exchanger for heat exchange through the third branch, the refrigerant steam discharged by the second heat exchanger flows through the four-way valve to enter the overheating channel of the gas-liquid separator from the air inlet pipe to exchange heat with the refrigerant liquid in the gas-liquid separator, overheating of the refrigerant steam is realized, and the refrigerant steam after heat exchange is discharged from the air outlet pipe, and is sucked into the compressor again to realize the heating cycle of the air conditioning system.
9. An operation method using the air conditioning system as claimed in claim 7, wherein when the air conditioning system is in a cooling mode, the valve port A and the valve port D of the four-way valve (33) are connected, the valve port B and the valve port C are connected, the solenoid valves of the first branch (35) and the second branch (36) are opened to connect the two branches, the solenoid valves of the third branch (37) and the fourth branch (38) are closed to block the two branches, the refrigerant sucked into the compressor (32) is compressed and then output from the compressor outlet (322), flows through the valve port A and the valve port D of the four-way valve (33), enters the second heat exchanger (31) through the third medium port (311) for heat exchange, the refrigerant liquid after heat exchange enters the second branch (36) from the fourth medium port (312) and enters the supercooling channel of the gas-liquid separator (1) from the first inlet (151), the refrigerant vapor is subjected to heat exchange with the refrigerant vapor in the gas-liquid separator (1) to realize supercooling of the refrigerant liquid, the refrigerant liquid after heat exchange is output from the liquid outlet pipe (16) to enter the first branch (35) and enters the first heat exchanger (21) from the second medium port (212) to carry out heat exchange, the refrigerant vapor after heat exchange flows through the valve port B and the valve port C of the four-way valve (33) from the first medium port (211), enters the superheat channel of the gas-liquid separator (1) from the air inlet pipe (13) to carry out heat exchange with the refrigerant liquid in the gas-liquid separator (1) to realize superheating of the refrigerant vapor, and the refrigerant vapor after heat exchange is output from the air outlet pipe (14) and is sucked into the compressor (32) from the compressor inlet (321) again to realize refrigeration cycle of the air conditioning system; or,
when the air conditioning system is in a heating mode, a valve port A and a valve port B of the four-way valve (33) are communicated, a valve port D and a valve port C are communicated, electromagnetic valves on the first branch (35) and the second branch (36) are closed to block the two branches, electromagnetic valves on the third branch (37) and the fourth branch (38) are opened to conduct the two branches, a refrigerant sucked into the compressor (32) is compressed and then output from the compressor outlet (322), flows through the valve port A and the valve port B of the four-way valve (33), enters the first heat exchanger (21) from the first medium port (211) for heat exchange, a refrigerant liquid after heat exchange enters the fourth branch (38) from the second medium port (212), enters a supercooling channel of the gas-liquid separator (1) from the second inlet (152) for heat exchange with steam in the gas-liquid separator (1), the supercooling of the refrigerant liquid is realized, the refrigerant liquid after heat exchange is output from the liquid outlet pipe (16) to enter the third branch (37), enters the second heat exchanger (31) from the fourth medium port (312) for heat exchange, the refrigerant steam after heat exchange flows through the valve port D and the valve port C of the four-way valve (33) from the third medium port (311), enters the overheating channel of the gas-liquid separator (1) from the air inlet pipe (13), exchanges heat with the refrigerant liquid in the gas-liquid separator (1) to realize the overheating of the refrigerant steam, the refrigerant steam after heat exchange is output from the air outlet pipe (14), is sucked into the compressor (32) from the compressor inlet (321), and the heating cycle of the air conditioning system is realized.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510675456.2A CN105241134B (en) | 2015-10-16 | 2015-10-16 | Gas-liquid separator, air conditioning system and operation method of air conditioning system |
| PCT/CN2016/107726 WO2017063613A1 (en) | 2015-10-16 | 2016-11-29 | Gas liquid separator, air conditioning system, and air conditioning system operation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510675456.2A CN105241134B (en) | 2015-10-16 | 2015-10-16 | Gas-liquid separator, air conditioning system and operation method of air conditioning system |
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| CN105241134A CN105241134A (en) | 2016-01-13 |
| CN105241134B true CN105241134B (en) | 2018-07-17 |
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