CN109458744A - Air-conditioning refrigeration system and compressor liquid impact prevention method - Google Patents
Air-conditioning refrigeration system and compressor liquid impact prevention method Download PDFInfo
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- CN109458744A CN109458744A CN201811521117.9A CN201811521117A CN109458744A CN 109458744 A CN109458744 A CN 109458744A CN 201811521117 A CN201811521117 A CN 201811521117A CN 109458744 A CN109458744 A CN 109458744A
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- liquid level
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- electric expansion
- expansion valve
- air
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- 239000007788 liquid Substances 0.000 title claims abstract description 175
- 238000004378 air conditioning Methods 0.000 title claims abstract description 33
- 238000005057 refrigeration Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000002265 prevention Effects 0.000 title claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 50
- 239000003507 refrigerant Substances 0.000 claims abstract description 44
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000012512 characterization method Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 4
- 239000002826 coolant Substances 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001698 pyrogenic effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004781 supercooling 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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
-
- 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 present invention provides a kind of air-conditioning refrigeration systems and compressor liquid impact prevention method, are related to air-conditioning technical field.The air-conditioning refrigeration system and compressor liquid impact prevention method are by being arranged second branch and position of the inside of compressor at the air inlet not higher than muffler being provided with liquid level sensor, the first branch is provided with electronic valve, second branch is provided with the first electric expansion valve, interior machine is provided with the second electric expansion valve, and liquid level sensor, the first electric expansion valve, the second electric expansion valve, electronic valve are electrically connected with main control chip respectively.The liquid level signal of liquid level sensor transmission is received in main control chip, and according to the folding condition of liquid level signal adjusting electronic valve and/or the opening and closing degree of the opening and closing degree of the first electric expansion valve and/or the second electric expansion valve, so that the liquid refrigerants in fluid reservoir will not flow into compressor by muffler, so that liquid hammer will not occur for compressor, failure rate when operation of air conditioner is significantly reduced.
Description
Technical field
The present invention relates to air-conditioning technical fields, in particular to a kind of air-conditioning refrigeration system and compressor liquid impact prevention side
Method.
Background technique
During operation of air conditioner, it is easy to flow back to positioned at the liquid refrigerants of the fluid reservoir of air-conditioning liquid occurs in compressor
It hits.For example, under cooling operation mode: when outside environment temperature and lower indoor temperature, condenser interior liquid is cold
Matchmaker is more to cut that degree of supercooling is larger, and the liquid refrigerant temperature into evaporator is relatively low, and inside temperature is relatively low at this time, and evaporator liquid is cold
Not exclusively, liquid refrigerants can exceed that fluid reservoir storage values to matchmaker's evaporation, into compressor air suction end, cause liquid hammer.For another example
Under heating operation mode: when outside environment temperature is lower, when inside heating needs amount is larger, outdoor condenser liquid is cold
Not exclusively, liquid refrigerants can exceed that fluid reservoir storage values to matchmaker's evaporation, into compressor air suction end, cause liquid hammer.
Summary of the invention
Problems solved by the invention is a kind of air-conditioning refrigeration system and compressor liquid impact prevention method, to improve above-mentioned ask
Topic.
To solve the above problems, the air-conditioning refrigeration system includes master control the present invention provides a kind of air-conditioning refrigeration system
Chip, compressor, fluid reservoir, interior machine, outer machine, the first branch, second branch and muffler, the compressor, described first
Branch, the interior machine, the outer machine, the fluid reservoir, the muffler and the compressor sequentially turn on forming circuit,
In, the air inlet of the muffler is located at the top of the inside of the compressor, the compressor by second branch with it is described
The bottom of fluid reservoir is connected,
Position of the inside of the compressor at the air inlet not higher than the muffler is provided with liquid level sensor, institute
It states the first branch and is provided with electronic valve, the second branch is provided with the first electric expansion valve, and the interior machine is provided with second
Electric expansion valve, the liquid level sensor, first electric expansion valve, the second electric expansion valve, electronic valve difference
It is electrically connected with the main control chip,
The main control chip is used to receive the liquid level signal of the liquid level sensor transmission, and adjusts institute according to liquid level signal
State the folding condition of electronic valve and/or the opening and closing degree of first electric expansion valve and/or second electric expansion valve
Opening and closing degree so that liquid refrigerants in fluid reservoir will not pass through the muffler and flow into the compressor.
The air-conditioning refrigeration system is by setting second branch and in the inside of compressor in the air inlet for being not higher than muffler
Position at mouthful is provided with liquid level sensor, and the first branch is provided with electronic valve, and second branch is provided with the first electronic expansion
Valve, interior machine are provided with the second electric expansion valve, and by liquid level sensor, the first electric expansion valve, the second electric expansion valve, electronics
Valve is electrically connected with main control chip respectively.The liquid level signal of liquid level sensor transmission is received in main control chip, and according to liquid level
The opening and closing degree and/or the second electric expansion valve of the folding condition of Signal Regulation electronic valve and/or the first electric expansion valve
Opening and closing degree, so that the liquid refrigerants in fluid reservoir will not flow into compressor by muffler, so that compressor will not be sent out
Raw liquid hammer, significantly reduces failure rate when operation of air conditioner.
Further, the main control chip is specifically used for the liquid level signal characterization in the received liquid level sensor transmission
Liquid level be to control the electronic valve when maintaining an equal level with the position height at the air inlet of the muffler and close, described first
Electric expansion valve is opened to the first presetting aperture.
It is the position at the air inlet with muffler in the liquid level of the liquid level signal characterization of received liquid level sensor transmission
When height maintains an equal level, illustrate interior machine liquid refrigerants evaporation not exclusively, fluid reservoir contains a large amount of refrigerants, will lead to compressor and liquid occurs
It hits, closes solenoid valve C at this time and open the first electric expansion valve so that outer machine liquid refrigerants does not enter back into fluid reservoir
The first presetting aperture is opened, to guarantee the normal compression ratio of compression pyrogenic operation.
Further, the part between first electric expansion valve and the fluid reservoir of the second branch is set
It is equipped with the first baroceptor, the part between the compressor and the electronic valve of the first branch is provided with
Second baroceptor,
The main control chip is specifically used for
When being greater than 0 with the difference of the position height at the air inlet of the muffler and be less than presetting first threshold, described in control
Electronic valve is opened, the aperture of second electric expansion valve is less than the second presetting aperture, and controls first electronics
Expansion valve is opened to presetting third aperture, so that collected first atmospheric pressure value of first baroceptor is equal to described
Collected second atmospheric pressure value of second baroceptor.
It is the position at the air inlet with muffler in the liquid level of the liquid level signal characterization of received liquid level sensor transmission
When the difference of height is greater than 0 and is less than presetting first threshold, illustrate interior machine liquid refrigerants evaporation not exclusively, fluid reservoir accumulates
Refrigerant it is more, compressor has liquid hammer risk, at this point, control the electronic valve open, the aperture of the second electric expansion valve it is small
It in the second presetting aperture, tails off so as to allow into interior machine liquid refrigerants, a large amount of interior machine refrigerant can be flashed to
Gaseous coolant, and the first atmospheric pressure value is equal to collected second atmospheric pressure value of second baroceptor, can prevent refrigerant from falling
Pour into outer machine.
Further, the aperture that main control chip controls second electric expansion valve is less than the side of the second presetting aperture
Formula is the aperture of the second electric expansion valve described in main control chip to specified minimum aperture.
Setting can allow minimum into interior machine liquid refrigerants in this way, allow interior machine refrigerant that can all flash to gaseous coolant.
The main control chip is specifically used for
When being greater than presetting first threshold with the difference of the position height at the air inlet of the muffler, first electronics is controlled
Expansion valve is closed, the electronic valve is opened.
In the air inlet that the liquid level of the liquid level signal characterization of the received liquid level sensor transmission is with the muffler
When the difference of the position height at place is greater than presetting first threshold, illustrate that the liquid refrigerants in fluid reservoir is less at this time, it will not
Enter compressor from muffler and generate liquid hammer, open electronic valve at this time, closes the first electric expansion valve, pressed to control air-conditioning
It is run according to normal operation mode.
Further, it is U-shaped that the muffler, which is located at the part in the fluid reservoir,.
So as to fully allow the gaseous coolant of high temperature is substantially low to carry out cold and hot exchange with the liquid refrigerants of low temperature.
Further, the bottom of the U-shaped part of the muffler is provided with oil return hole.
Further, the liquid level sensor is along the side of the liquid storage top tank structure from high to low spaced more
A level sensing module, and the height for being located at the level sensing module of the top is lower than the air inlet of the muffler.
Further, part of the first branch between the electronic valve and the compressor is provided with four-way
Valve, the fixing end of the four-way valve are connected with one end of the first branch, the first switch terminal of the four-way valve, the second switching
End and third switch terminal are connected with the outer machine, the other end of the first branch, the interior machine respectively.
Second aspect, the embodiment of the invention also provides a kind of compressor liquid impact prevention methods, applied to above-mentioned air-conditioning system
Cooling system, the compressor liquid impact prevention method include:
Liquid level signal in the liquid level sensor acquisition fluid reservoir, and liquid level signal is transmitted to main control chip；
The main control chip receives the liquid level signal of the liquid level sensor transmission, and adjusts the electricity according to liquid level signal
The opening and closing degree and/or second electric expansion valve of the folding condition of sub- valve and/or first electric expansion valve are opened
Conjunction degree, so that the liquid refrigerants in fluid reservoir will not flow into the compressor by the muffler.
The compressor liquid impact prevention method receives the liquid level signal of liquid level sensor transmission in main control chip, and according to liquid level
The opening and closing degree and/or the second electric expansion valve of the folding condition of Signal Regulation electronic valve and/or the first electric expansion valve
Opening and closing degree, so that the liquid refrigerants in fluid reservoir will not flow into compressor by muffler, so that compressor will not be sent out
Raw liquid hammer, significantly reduces failure rate when operation of air conditioner.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of air-conditioning refrigeration system provided in an embodiment of the present invention；
Fig. 2 is the circuit connection block diagram of air-conditioning refrigeration system provided in an embodiment of the present invention；
Fig. 3 is the flow chart of compressor liquid impact prevention method provided in an embodiment of the present invention.
Description of symbols: 101- main control chip；102- compressor；103- fluid reservoir；Machine in 104-；The outer machine of 105-；
The 106- first branch；107- second branch；108- muffler；109- liquid level sensor；110- the first level sensing module；111-
Second level sensing module；113- third level sensing module；The first electric expansion valve of 114-；The second electric expansion valve of 115-；
116- electronic valve；The first baroceptor of 117-；The second baroceptor of 118-；119- four-way valve.
Specific embodiment
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
Referring to Fig. 1, the present invention provides a kind of air-conditioning refrigeration system, the air-conditioning refrigeration system include main control chip 101,
Compressor 102, fluid reservoir 103, interior machine 104, outer machine 105, the first branch 107, second branch and muffler 108.Compressor
102, the first branch 107, interior machine 104, outer machine 105, fluid reservoir 103, muffler 108 and compressor 102 sequentially turn on to be formed
Circuit.Wherein, the air inlet of muffler 108 is located at the top of the inside of compressor 102, compressor 102 by second branch with
The bottom of fluid reservoir 103 is connected, so that the high-temperature gas refrigerant that compressor 102 exports can be cold with the liquid in fluid reservoir 103
Matchmaker comes into full contact with.
High-temperature gas refrigerant enters fluid reservoir 103 from the bottom of fluid reservoir 103 by second branch, can be with fluid reservoir
Liquid refrigerants in 103 rises to the top of fluid reservoir 103 after being sufficiently mixed, while to be evaporated to gaseous state cold for the heat absorption of operative liquid refrigerant
Matchmaker rises to 103 top of fluid reservoir, and gaseous coolant flows back into compressor 102 by muffler 108.In the present embodiment, by return-air
Pipe 108 is located at the design of the part in fluid reservoir 103 U-shaped, so as to fully allow the gaseous coolant of high temperature substantially low and low temperature
Liquid refrigerants carry out cold and hot exchange, of course, it may be others that muffler 108, which is located at the part in fluid reservoir 103,
Shape is merely illustrative herein.The bottom of the U-shaped part of muffler 108 is provided with oil return hole.
Position of the inside of compressor 102 at the air inlet not higher than muffler 108 is provided with liquid level sensor 109,
The first branch 107 is provided with electronic valve 116, and second branch is provided with the first electric expansion valve 114, and interior machine 104 is provided with
Two electric expansion valves 115.As shown in Fig. 2, liquid level sensor 109, the first electric expansion valve 114, the second electric expansion valve 115,
Electronic valve 116 is electrically connected with main control chip 101 respectively.
In the present embodiment, electronic valve 116 can use but be not limited to solenoid valve.Wherein, liquid level sensor 109 can be
Along the spaced multiple level sensing modules of the side of 103 inner wall of fluid reservoir from high to low, and it is located at the liquid level of the top
The height of sensing module is lower than the air inlet of muffler 108.In the present embodiment, liquid level sensor 109 includes along fluid reservoir 103
Spaced first level sensing module 110, the second level sensing module 111 and the third liquid of the side of wall from high to low
Position sensing module 113.
Main control chip 101 is used to receive the liquid level signal of the transmission of liquid level sensor 109, and adjusts electronics according to liquid level signal
The folding of the opening and closing degree and/or the second electric expansion valve 115 of the folding condition of valve 116 and/or the first electric expansion valve 114
Degree, so that the liquid refrigerants in fluid reservoir 103 will not flow into compressor 102 by muffler 108.
The air-conditioning refrigeration system is being not higher than muffler 108 by setting second branch and in the inside of compressor 102
Air inlet at position be provided with liquid level sensor 109, the first branch 107 is provided with electronic valve 116, second branch setting
There is the first electric expansion valve 114, interior machine 104 is provided with the second electric expansion valve 115, and by liquid level sensor 109, the first electronics
Expansion valve 114, the second electric expansion valve 115, electronic valve 116 are electrically connected with main control chip 101 respectively.In main control chip 101
Receive liquid level sensor 109 transmission liquid level signal, and according to liquid level signal adjust electronic valve 116 folding condition and/
Or first electric expansion valve 114 opening and closing degree and/or the second electric expansion valve 115 opening and closing degree so that in fluid reservoir 103
Liquid refrigerants will not by muffler 108 flow into compressor 102 so that liquid hammer will not occur for compressor 102, effectively
Reduce failure rate when operation of air conditioner.
Specifically, as one of embodiment, main control chip 101 is specifically used in received first level sensing mould
The liquid level for the liquid level signal characterization that block 110 transmits is when maintaining an equal level with the position height at the air inlet of muffler 108, to control electronics
Valve 116 is closed, and the first electric expansion valve 114, which is opened, arrives the first presetting aperture.
At the liquid level that the liquid level signal of received liquid level sensor 109 transmission characterizes is the air inlet with muffler 108
Position height when maintaining an equal level, illustrate in the evaporation of 104 liquid refrigerants of machine it is incomplete, fluid reservoir 103 contains a large amount of refrigerants, will lead to
Liquid hammer occurs for compressor 102, solenoid valve C is closed at this time, so that 105 liquid refrigerants of outer machine does not enter back into fluid reservoir
103, the first electric expansion valve 114 is opened and arrives the first presetting aperture, to guarantee the normal compression of compression pyrogenic operation
Than.Wherein, the first aperture may range from 80-140, for example, the first aperture can be 80,100,140, in the present embodiment,
Preferably 100.
Specifically, as another embodiment, it is located at the first electric expansion valve 114 and fluid reservoir in second branch
Part between 103 is provided with the first baroceptor 117, the first branch 107 is located at compressor 102 and electronic valve 116
Between part be provided with the second baroceptor 118, main control chip 101 is specifically used for passing in received liquid level sensor 109
The liquid level of defeated liquid level signal characterization is to be greater than 0 with the difference of the position height at the air inlet of muffler 108 and be less than default
When fixed first threshold, control electronic valve 116 is opened, the aperture of the second electric expansion valve 115 is less than presetting second and opens
Degree, and control the first electric expansion valve 114 and open to presetting third aperture, so that the first baroceptor 117 collects
The first atmospheric pressure value be equal to collected second atmospheric pressure value of the second baroceptor 118.
At the liquid level that the liquid level signal of received liquid level sensor 109 transmission characterizes is the air inlet with muffler 108
The difference of position height when being greater than 0 and being less than presetting first threshold, illustrate in the evaporation of 104 liquid refrigerants of machine it is incomplete,
The refrigerant that fluid reservoir 103 accumulates is more, and compressor 102 has liquid hammer risk, at this point, control electronic valve 116 is opened, the second electronics
The aperture of expansion valve 115 is less than the second presetting aperture, tails off so as to allow into interior 104 liquid refrigerants of machine, allows a large amount of
104 refrigerant of interior machine can flash to gaseous coolant, and opened by the first electric expansion valve 114 of control and arrive presetting third
Aperture can make the first atmospheric pressure value be equal to collected second atmospheric pressure value of the second baroceptor 118, can prevent refrigerant from falling
Pour into outer machine 105, wherein presetting third open range can be 0-500, can control third aperture between 0-500
It adjusts, when third aperture rises, the collected air pressure of the first baroceptor 117 rises, conversely, the aperture decline at third
When, the collected air pressure decline of the first baroceptor 117.
Preferably, the aperture that main control chip 101 controls the second electric expansion valve 115 is less than the side of the second presetting aperture
Formula is the aperture of 101 second electric expansion valve 115 of main control chip to specified minimum aperture, wherein specified minimum aperture can be
But 70 are not limited to, setting in this way can allow minimum into interior 104 liquid refrigerants of machine, and interior 104 refrigerant of machine can all be flashed to
Gaseous coolant.
Specifically, as another embodiment, main control chip 101 is specifically used for passing in received liquid level sensor 109
The liquid level of defeated liquid level signal characterization is to be greater than presetting first with the difference of the position height at the air inlet of muffler 108
When threshold value, the first electric expansion valve 114 of control is closed, electronic valve 116 is opened.In the transmission of received liquid level sensor 109
The liquid level of liquid level signal characterization is to be greater than presetting first threshold with the difference of the position height at the air inlet of muffler 108
When, illustrate that the liquid refrigerants in fluid reservoir 103 is less at this time, compressor 102 will not be entered from muffler 108 and generate liquid hammer, this
Shi Kaiqi electronic valve 116 is closed the first electric expansion valve 114, is run to control air-conditioning according to normal operation mode.
In addition, in the present embodiment, part setting of the first branch 107 between electronic valve 116 and compressor 102
There is four-way valve 119, the fixing end of four-way valve 119 is connected with one end of the first branch 107, the first switch terminal of four-way valve 119,
Two switch terminals and third switch terminal are connected with outer machine 105, the other end of the first branch 107, interior machine 104 respectively.Different
Under operating condition, fixing end can arbitrarily switch to any one in the first switch terminal, the second switch terminal and third switch terminal
Conducting.
Referring to Fig. 3, the embodiment of the invention also provides a kind of compressor liquid impact prevention methods, applied to above-mentioned air-conditioning system
Cooling system, wherein the compressor liquid impact prevention method includes:
Step S301: liquid level sensor 109 acquires the liquid level signal in fluid reservoir 103, and liquid level signal is transmitted to master
Control chip 101.
Step S302: main control chip 101 receives the liquid level signal that liquid level sensor 109 transmits, and according to liquid level signal tune
Save the folding condition of electronic valve 116 and/or the opening and closing degree and/or the second electric expansion valve 115 of the first electric expansion valve 114
Opening and closing degree so that liquid refrigerants in fluid reservoir 103 will not pass through muffler 108 and flow into compressor 102.
The compressor liquid impact prevention method main control chip 101 receive liquid level sensor 109 transmission liquid level signal, and according to
The folding condition of electronic valve 116 and/or the opening and closing degree and/or second of the first electric expansion valve 114 are adjusted according to liquid level signal
The opening and closing degree of electric expansion valve 115, so that the liquid refrigerants in fluid reservoir 103 will not flow into compressor by muffler 108
102, so that liquid hammer will not occur for compressor 102, significantly reduce failure rate when operation of air conditioner.
In conclusion the air-conditioning refrigeration system and compressor liquid impact prevention method are by setting second branch and in compressor
Inside not higher than muffler air inlet at position be provided with liquid level sensor, the first branch is provided with electronic valve,
Second branch is provided with the first electric expansion valve, and interior machine is provided with the second electric expansion valve, and by liquid level sensor, the first electronics
Expansion valve, the second electric expansion valve, electronic valve are electrically connected with main control chip respectively.Liquid level sensor is received in main control chip
The liquid level signal of transmission, and the folding of the folding condition and/or the first electric expansion valve according to liquid level signal adjusting electronic valve
The opening and closing degree of degree and/or the second electric expansion valve, so that the liquid refrigerants in fluid reservoir will not be flowed by muffler and be pressed
Contracting machine significantly reduces failure rate when operation of air conditioner so that liquid hammer will not occur for compressor.
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (10)
1. a kind of air-conditioning refrigeration system, which is characterized in that the air-conditioning refrigeration system includes main control chip (101), compressor
(102), fluid reservoir (103), interior machine (104), outer machine (105), the first branch (106), second branch (107) and muffler
(108), the compressor (102), the first branch (106), the interior machine (104), the outer machine (105), the liquid storage
Tank (103), the muffler (108) and the compressor (102) sequentially turn on forming circuit, wherein the muffler
(108) air inlet is located at the top of the inside of the compressor (102), and the compressor (102) passes through second branch (107)
It is connected with the bottom of the fluid reservoir (103),
Position of the inside of the compressor (102) at the air inlet not higher than the muffler (108) is provided with liquid level and passes
Sensor (109), the first branch (106) are provided with electronic valve (116), and the second branch (107) is provided with the first electricity
Sub- expansion valve (114), the interior machine (104) are provided with the second electric expansion valve (115), the liquid level sensor (109), described
First electric expansion valve (114), the second electric expansion valve (115), the electronic valve (116) respectively with the main control chip
(101) it is electrically connected,
The main control chip (101) is used to receive the liquid level signal of the liquid level sensor (109) transmission, and according to liquid level signal
Adjust the folding condition of the electronic valve (116) and/or opening and closing degree and/or the institute of first electric expansion valve (114)
The opening and closing degree of the second electric expansion valve (115) is stated, so that the liquid refrigerants in fluid reservoir (103) will not pass through the muffler
(108) compressor (102) is flowed into.
2. air-conditioning refrigeration system according to claim 1, which is characterized in that the main control chip (101) is specifically used for
The liquid level of the liquid level signal characterization of the received liquid level sensor (109) transmission is the air inlet with the muffler (108)
When the position height at place maintains an equal level, the electronic valve (116) closing is controlled, first electric expansion valve (114) is opened to pre-
First aperture of setting.
3. air-conditioning refrigeration system according to claim 1, which is characterized in that being located at for the second branch (107) is described
Part between first electric expansion valve (114) and the fluid reservoir (103) is provided with the first baroceptor (117), described
The part between the compressor (102) and the electronic valve (116) of the first branch (106) is provided with the second air pressure
Sensor (118),
The main control chip (101) is specifically for the liquid level signal characterization in received liquid level sensor (109) transmission
Liquid level is to be greater than 0 with the difference of the position height at the air inlet of the muffler (108) and be less than presetting first threshold
When, control the electronic valve (116) unlatching, the aperture of second electric expansion valve (115) is less than presetting second and opens
Degree, and control first electric expansion valve (114) and open to presetting third aperture, so that first baroceptor
(117) collected first atmospheric pressure value is equal to collected second atmospheric pressure value of the second baroceptor (118).
4. air-conditioning refrigeration system according to claim 3, which is characterized in that main control chip (101) control second electricity
The mode that the aperture of sub- expansion valve (115) is less than the second presetting aperture is main control chip (101) described second electronic expansion
The aperture of valve (115) is to specified minimum aperture.
5. air-conditioning refrigeration system according to claim 1, which is characterized in that the main control chip (101) is specifically used for
The liquid level of the liquid level signal characterization of the received liquid level sensor (109) transmission is the air inlet with the muffler (108)
When the difference of the position height at place is greater than presetting first threshold, controls first electric expansion valve (114) and close, is described
Electronic valve (116) is opened.
6. air-conditioning refrigeration system according to claim 1, which is characterized in that the muffler (108) is located at the liquid storage
Part in tank (103) is U-shaped.
7. air-conditioning refrigeration system according to claim 6, which is characterized in that the bottom of the U-shaped part of the muffler (108)
Portion is provided with oil return hole.
8. air-conditioning refrigeration system according to claim 1, which is characterized in that the liquid level sensor (109) is along described
The spaced multiple level sensing modules of the side of fluid reservoir (103) inner wall from high to low, and it is located at the liquid level of the top
The height of sensing module is lower than the air inlet of the muffler (108).
9. air-conditioning refrigeration system according to claim 1, which is characterized in that the first branch (106) is located at the electricity
Part between sub- valve (116) and the compressor (102) is provided with four-way valve (119), the fixation of the four-way valve (119)
End is connected with one end of the first branch (106), the first switch terminal of the four-way valve (119), the second switch terminal and the
Three switch terminals are connected with the outer machine (105), the other end of the first branch (106), the interior machine (104) respectively.
10. a kind of compressor liquid impact prevention method, which is characterized in that it is applied to air-conditioning refrigeration system described in claim 1, it is described
Compressor liquid impact prevention method includes:
Liquid level signal in liquid level sensor (109) acquisition fluid reservoir (103), and liquid level signal is transmitted to main control chip
(101)；
The main control chip (101) receives the liquid level signal of liquid level sensor (109) transmission, and adjusts according to liquid level signal
The folding condition of the electronic valve (116) and/or the opening and closing degree of first electric expansion valve (114) and/or described
The opening and closing degree of two electric expansion valves (115), so that the liquid refrigerants in fluid reservoir (103) will not pass through the muffler
(108) compressor (102) is flowed into.
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