CN107449191B - Air-conditioning system and its heat-production control method, device and machine readable storage medium - Google Patents
Air-conditioning system and its heat-production control method, device and machine readable storage medium Download PDFInfo
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- CN107449191B CN107449191B CN201710595194.8A CN201710595194A CN107449191B CN 107449191 B CN107449191 B CN 107449191B CN 201710595194 A CN201710595194 A CN 201710595194A CN 107449191 B CN107449191 B CN 107449191B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2113—Temperatures of a suction accumulator
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of air-conditioning system and its heat-production control methods, device and machine readable storage medium, which comprises data acquisition step (S0): obtaining the third degree of superheat ACSH3 of the first degree of superheat DSH1 and pressure at expulsion P1 of the refrigerant in the exhaust pipe of compressor, the second degree of superheat SSH2 of refrigerant in the exhaust pipe of gas-liquid separator and the refrigerant in air inlet pipe；Gas-liquid separator drain step (S1): when pressure at expulsion P1 is within the scope of the first permission pressure at expulsion and the first degree of superheat DSH1 is in the first degree of superheat preset range, and when the second degree of superheat SSH2 is less than the lower threshold value of third degree of superheat preset range less than the lower threshold value and third degree of superheat ACSH3 of the second degree of superheat preset range, the refriger-ant section in the exhaust pipe of compressor is branched in the air inlet pipe of gas-liquid separator.The above method can be such that the liquid refrigerant for lodging in gas-liquid separator bottom is discharged in time, improve the heating capacity of air-conditioning system at low temperature.
Description
Technical field
The present invention relates to the heating control technology fields of air-conditioning system, control more particularly to a kind of air-conditioning system and its heating
Method, apparatus processed and machine readable storage medium.
Background technique
When air-conditioning system operates in heating mode, the refrigerant in outdoor unit heat exchanger needs to absorb the heat in external environment
Amount realizes the conversion of liquid to gaseous state superheat state.But under the external environment compared with low temperature, due to the system in outdoor unit heat exchanger
Cryogen and the extraneous temperature difference are smaller, and heat exchange efficiency reduces, make the refrigerant being back in gas-liquid separator the degree of superheat and mass dryness fraction compared with
Small, the refrigerant flow for participating in Air Conditioning Cycle reduces, and the heating capacity of air-conditioning system is caused to decline.
Therefore, it is necessary to the heating methods to air-conditioning system to optimize, and pass through what is accumulated in timely drainage gas-liquid separator
Liquid refrigerant increases the refrigerant flow for participating in Air Conditioning Cycle, promotes air-conditioning system compared with the heating under low temperature environment
Ability.
Summary of the invention
It is in view of the above drawbacks of the prior art or insufficient, the present invention provides a kind of heat-production control method of air-conditioning system,
The liquid refrigerant accumulated in gas-liquid separator can be discharged in time, promote air-conditioning system compared with the heating under low temperature environment
Energy.
To achieve the above object, the present invention provides a kind of heat-production control methods of air-conditioning system, which comprises
Data acquisition step: under the heating mode of air-conditioning system, of the refrigerant in the exhaust pipe of compressor is obtained
One degree of superheat DSH1 and pressure at expulsion P1, gas-liquid separator exhaust pipe in the second degree of superheat SSH2 of refrigerant and described
The third degree of superheat ACSH3 of refrigerant in the air inlet pipe of gas-liquid separator；
Gas-liquid separator drain step: when the pressure at expulsion P1 first allow pressure at expulsion within the scope of and described first
Degree of superheat DSH1 is in the first degree of superheat preset range, and second degree of superheat SSH2 is less than the second degree of superheat preset range
Lower threshold value and the third degree of superheat ACSH3 be less than third degree of superheat preset range lower threshold value when, by the compressor
Exhaust pipe in refriger-ant section branch in the air inlet pipe of the gas-liquid separator to promote the gas-liquid separator drain；
Compressor blowdown step: air-conditioning system is in a heating mode in normal course of operation, when the pressure at expulsion P1 is big
In second allow pressure at expulsion range upper threshold value when, by the refriger-ant section pressure release in the exhaust pipe of the compressor to described
In the air inlet pipe of gas-liquid separator.
Further, the gas-liquid separator drain step further include:
After refriger-ant section in the exhaust pipe of the compressor to be branched to the air inlet pipe of the gas-liquid separator, work as institute
Pressure at expulsion P1 is stated greater than the upper threshold value of the first permission pressure at expulsion range or first degree of superheat DSH1 greater than described
The upper threshold value of first degree of superheat preset range or second degree of superheat SSH2 are greater than the upper of second degree of superheat preset range
When threshold value or the third degree of superheat ACSH3 are greater than the upper threshold value of the third degree of superheat preset range, stop the compression
Refrigerant in the exhaust pipe of machine branches in the air inlet pipe of the gas-liquid separator.
Preferably, described first allows pressure at expulsion range to be 2.2Mpa~2.6Mpa, and first degree of superheat presets model
25 DEG C~35 DEG C are enclosed, second degree of superheat preset range is 3 DEG C~5 DEG C, and the third degree of superheat preset range is 4 DEG C~5
℃。
Further, the compressor blowdown step further include:
After in the air inlet pipe of the refriger-ant section pressure release in the exhaust pipe of the compressor to the gas-liquid separator, when
When the pressure at expulsion P1 allows the lower threshold value of pressure at expulsion range less than second, stopping will be in the exhaust pipe of the compressor
In refrigerant pressure release to the air inlet pipe of the gas-liquid separator.
Preferably, described second allows pressure at expulsion range to be 3.3Mpa~3.6Mpa.
Correspondingly, the present invention also provides a kind of heating control device of air-conditioning system, described device includes first pressure
Sensor, the first temperature sensor, second pressure sensor, second temperature sensor, third pressure sensor, third temperature pass
Sensor and controller are connected with refrigerant and backflow pipeline between the exhaust pipe of compressor and the air inlet pipe of gas-liquid separator, institute
It states refrigerant and backflows and be equipped with electromagnetic switch valve in pipeline, in which:
The first pressure sensor, the pressure at expulsion of the refrigerant in exhaust pipe for acquiring the compressor；
First temperature sensor, the refrigerant temperature in exhaust pipe for acquiring the compressor；
The second pressure sensor, the exhaust pressure of the refrigerant in exhaust pipe for acquiring the gas-liquid separator
Power；
The second temperature sensor, the refrigerant temperature in exhaust pipe for acquiring the gas-liquid separator；
The third pressure sensor, the air inlet pressure of the refrigerant in air inlet pipe for acquiring the gas-liquid separator
Power；
The third temperature sensor, the refrigerant temperature in air inlet pipe for acquiring the gas-liquid separator；
The controller, is configured to:
Under the heating mode of air-conditioning system, the first pressure sensor, the first temperature sensor, second pressure are received
Sensor, second temperature sensor, third pressure sensor, third temperature sensor acquisition signal to obtain the compressor
Exhaust pipe in the first degree of superheat DSH1 and pressure at expulsion P1 of refrigerant, the refrigeration in the exhaust pipe of the gas-liquid separator
The third degree of superheat ACSH3 of second degree of superheat SSH2 of agent and the refrigerant in the air inlet pipe of the gas-liquid separator；And
When the pressure at expulsion P1 allows within the scope of pressure at expulsion and first degree of superheat DSH1 is described the first
In one degree of superheat preset range, and second degree of superheat SSH2 be less than second degree of superheat preset range lower threshold value with
And the third degree of superheat ACSH3 be less than the third degree of superheat preset range lower threshold value when, control the electromagnetic switch valve
The refrigerant is connected and backflows pipeline to promote the gas-liquid separator drain；
Air-conditioning system in normal course of operation, allows to arrange when the pressure at expulsion P1 is greater than described second in a heating mode
When the upper threshold value of atmospheric pressure range, controls the electromagnetic switch valve conducting refrigerant and backflow pipeline with pressure release.
Specifically, the controller is further configured to:
When the control conducting refrigerant backflows pipeline with drain, allow to arrange when the pressure at expulsion P1 is greater than described first
The upper threshold value of atmospheric pressure range or first degree of superheat DSH1 are greater than the upper threshold value of first degree of superheat preset range, or
Second degree of superheat SSH2 is big greater than the upper threshold value of second degree of superheat preset range or the third degree of superheat ACSH3
When the upper threshold value of the third degree of superheat preset range, controls refrigerant described in the electromagnetic switch valve breakdown and backflow pipeline.
Preferably, described first allows pressure at expulsion range to be 2.2Mpa~2.6Mpa, and first degree of superheat presets model
Enclosing is 25 DEG C~35 DEG C, second degree of superheat preset range be 3 DEG C~5 DEG C, the third degree of superheat preset range be 4 DEG C~
5℃。
Further, when the control conducting refrigerant backflows pipeline with pressure release, when the pressure at expulsion P1 is less than second
When allowing the lower threshold value of pressure at expulsion range, controls refrigerant described in the electromagnetic switch valve breakdown and backflow pipeline.
Preferably, described second allows pressure at expulsion range to be 3.3Mpa~3.6Mpa.
In addition, being stored on the machine readable storage medium the present invention also provides a kind of machine readable storage medium
Instruction, described instruction is used for so that machine executes the above method.
The present invention also provides a kind of air-conditioning system, the air-conditioning system includes above-mentioned heating control device of the invention.
According to the above technical scheme, through the invention in air-conditioning system heat-production control method, can ensure compressor
In the case where normal operation, the high-temperature high-pressure refrigerant part in compressor exhaust pipe is branched to the air inlet pipe of gas-liquid separator
Interior progress degree of superheat supplement, enables the liquid refrigerant for lodging in gas-liquid separator bottom to be discharged in time, increases participation air-conditioning
The refrigeration dose of system circulation effectively improves the heating capacity of air-conditioning system at low temperatures.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Fig. 1 is the flow chart according to the heat-production control method of the air-conditioning system of a specific embodiment of the invention；
Fig. 2 is the schematic diagram of the heating control device of the air-conditioning system of the method according to Fig. 1.
Description of symbols
100: air-conditioning system；
11: compressor；12: interior machine condenser；13: throttle valve；14: outer machine evaporator；15: gas-liquid separator；
21: first pressure sensor；22: the first temperature sensors；
31: second pressure sensor；32: second temperature sensor；
41: third pressure sensor；42: third temperature sensor；
5: electromagnetic switch valve.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the present invention provides a kind of heat-production control methods of air-conditioning system, comprising:
Data acquisition step S0: under the heating mode of air-conditioning system, the refrigerant in the exhaust pipe of compressor is obtained
First degree of superheat DSH1 and pressure at expulsion P1, gas-liquid separator exhaust pipe in refrigerant the second degree of superheat SSH2 and gas
The third degree of superheat ACSH3 of refrigerant in the air inlet pipe of liquid/gas separator；
Gas-liquid separator drain step S1: when pressure at expulsion P1 first allow pressure at expulsion within the scope of and first degree of superheat
DSH1 in the first degree of superheat preset range, and the second degree of superheat SSH2 less than the second degree of superheat preset range lower threshold value with
And third degree of superheat ACSH3 be less than third degree of superheat preset range lower threshold value when, by the refrigerant in the exhaust pipe of compressor
Part branches in the air inlet pipe of gas-liquid separator to promote gas-liquid separator drain.
As it can be seen that above-mentioned heat-production control method in the case where ensuring that compressor operates normally, passes through the above-mentioned degree of superheat of setting
It intelligently will pressure when determining that the degree of superheat of inlet end and an outlet end of gas-liquid separator is too low with pressure at expulsion analysis method
High-temperature high-pressure refrigerant part in contracting machine exhaust pipe, which branches to, carries out degree of superheat supplement in the air inlet pipe of gas-liquid separator, make gas
The device chamber temperature of liquid/gas separator increases, and discharge lodges in the liquid refrigerant of gas-liquid separator bottom in time, and it is empty to increase participation
The refrigeration dose of adjusting system circulation, effectively improves the heating capacity of air-conditioning system at low temperatures.
And the above method does not need to do the ontology of gas-liquid separator the improvement in structure, and it only need to be in compressor and gas-liquid
Increase a bypass of backflowing between separator, extremely with the high temperature and pressure communicating exhaust gas existing in the prior art by compressor
The fluid-discharge method that gas-liquid separator bottom directly supplements the degree of superheat is compared, and the technology difficulty that the above method is implemented is smaller, is saved
Manufacturing cost.
Further, gas-liquid separator drain step S1 further include:
After refriger-ant section in the exhaust pipe of compressor to be branched to the air inlet pipe of gas-liquid separator, as pressure at expulsion P1
Greater than the upper-level threshold that the upper threshold value of the first permission pressure at expulsion range or the first degree of superheat DSH1 are greater than the first degree of superheat preset range
Value or the second degree of superheat SSH2 are greater than the upper threshold value of the second degree of superheat preset range or third degree of superheat ACSH3 is greater than third mistake
When the upper threshold value of temperature preset range, stop the air inlet pipe that the refrigerant in the exhaust pipe of compressor is branched to gas-liquid separator
It is interior.
As it can be seen that drain of the above method in addition to being able to achieve gas-liquid separator, moreover it is possible to by above-mentioned analysis method, judge drain
The excessive situation of the degree of superheat and pressure at expulsion occurred in the process, system can intelligently turn off the exhaust pipe and gas of compressor at this time
The conducting of the air inlet pipe of liquid/gas separator avoids gas-liquid separator from influencing the stability of air-conditioning system operation because of excessive drain.
Preferably, first allows pressure at expulsion range for 2.2Mpa~2.6Mpa, and the first 25 DEG C of degree of superheat preset range~
35 DEG C, the second degree of superheat preset range is 3 DEG C~5 DEG C, and third degree of superheat preset range is 4 DEG C~5 DEG C.
In addition, above-mentioned heat-production control method further include:
Compressor blowdown step S2: air-conditioning system is in a heating mode in normal course of operation, when pressure at expulsion P1 is greater than
When the upper threshold value of the second permission pressure at expulsion range, by the refriger-ant section pressure release in the exhaust pipe of compressor to gas-liquid separator
Air inlet pipe in；And then, when pressure at expulsion P1 allows the lower threshold value of pressure at expulsion range less than second, stop compressor
Exhaust pipe in refrigerant pressure release to the air inlet pipe of gas-liquid separator in.
Preferably, second allows pressure at expulsion range to be 3.3Mpa~3.6Mpa.
That is, in air-conditioning system normal heating process, when the numerical value of the pressure at expulsion P1 of compressor is greater than second
When allowing the upper threshold value of pressure at expulsion range, compressor is in High Abnormal Pressure state, passes through above-mentioned compressor blowdown step S2
Refriger-ant section in the middle exhaust pipe by compressor branches to the method in the air inlet pipe of gas-liquid separator, is able to achieve compressor
Pressure release to reduce pressure at expulsion P1, the safety of enhancing air-conditioning system operation.
In pressure leak process, when pressure at expulsion P1 deteriorates to less than the lower threshold value of the second permission pressure at expulsion range, compression
It can stop being connected between the exhaust pipe of machine and the air inlet pipe of gas-liquid separator, to avoid leading to compressor because pressure release is excessive
Capacity is too low, ensure that the heating stability of air-conditioning system.
The present invention also provides a kind of heating control devices of air-conditioning system, and referring to Fig. 2, which includes that first pressure passes
Sensor 21, the first temperature sensor 22, second pressure sensor 31, second temperature sensor 32, third pressure sensor 41,
Three-temperature sensor 42 and controller are connected with refrigeration between the exhaust pipe of compressor 11 and the air inlet pipe of gas-liquid separator 15
Agent is backflowed pipeline, and refrigerant, which backflows, can be equipped with electromagnetic switch valve 5 in pipeline, in which:
First pressure sensor 21 is used to acquire the pressure at expulsion of the refrigerant in the exhaust pipe of compressor 11；
First temperature sensor 22 is used to acquire the refrigerant temperature in the exhaust pipe of compressor 11；
Second pressure sensor 31 is used to acquire the pressure at expulsion of the refrigerant in the exhaust pipe of gas-liquid separator 15；
Second temperature sensor 32 is used to acquire the refrigerant temperature in the exhaust pipe of gas-liquid separator 15；
Third pressure sensor 41 is used to acquire the admission pressure of the refrigerant in the air inlet pipe of gas-liquid separator 15；
Third temperature sensor 42 is used to acquire the refrigerant temperature in the air inlet pipe of gas-liquid separator 15；
Above controller receives first pressure sensor 21, the first temperature sensing under the heating mode of air-conditioning system 100
Device 22, second pressure sensor 31, second temperature sensor 32, third pressure sensor 41, third temperature sensor 42 are adopted
Collect the first degree of superheat DSH1 and pressure at expulsion P1, gas-liquid separator of the refrigerant in exhaust pipe of the signal to obtain compressor 11
The third of second degree of superheat SSH2 of the refrigerant in 15 exhaust pipe and the refrigerant in the air inlet pipe of gas-liquid separator 15
Degree of superheat ACSH3；
When pressure at expulsion P1 is within the scope of the first permission pressure at expulsion and the first degree of superheat DSH1 is default in first degree of superheat
In range, and the second degree of superheat SSH2 small less than the lower threshold value and third degree of superheat ACSH3 of the second degree of superheat preset range
When the lower threshold value of third degree of superheat preset range, control electromagnetic switch valve 5 is connected refrigerant and backflows pipeline to promote gas-liquid point
From 15 drain of device.
And then, when electromagnetic switch valve 5 controls conducting refrigerant and backflows pipeline with drain, when pressure at expulsion P1 is greater than the
One allows the upper threshold value of pressure at expulsion range or the first degree of superheat DSH1 greater than the upper threshold value of the first degree of superheat preset range, or
Second degree of superheat SSH2 is greater than the upper threshold value of the second degree of superheat preset range or third degree of superheat ACSH3 is greater than the third degree of superheat
When the upper threshold value of preset range, control electromagnetic switch valve 5 turns off refrigerant and backflows pipeline.
Preferably, first allows pressure at expulsion range to be 2.2Mpa~2.6Mpa, and the first degree of superheat preset range is 25 DEG C
~35 DEG C, the second degree of superheat preset range is 3 DEG C~5 DEG C, and third degree of superheat preset range is 4 DEG C~5 DEG C.
Specifically, the first pressure sensor 21 of the heating control device of above-mentioned air-conditioning system, the first temperature sensor 22
It is arranged on the exhaust pipe of compressor 11；Second pressure sensor 31, second temperature sensor 32 are arranged in gas-liquid separator 15
Exhaust pipe on；Third pressure sensor 41, third temperature sensor 42 are arranged in the air inlet pipe of gas-liquid separator 15.Control
The signal receiving module of device is after the acquisition data for receiving above-mentioned each sensor, by acquisition data and accordingly in computing module
Preset value be compared analysis, by signal output module export it is corresponding execute signal and control refrigerant backflow in pipeline
5 on or off of electromagnetic switch valve realizes the function of 15 drain of dynamic regulation gas-liquid separator, guarantees air-conditioning system 100 low
Efficient stable heating under warm environment.
In addition, air-conditioning system 100 in a heating mode in normal course of operation, allows to arrange when pressure at expulsion P1 is greater than second
When the upper threshold value of atmospheric pressure range, which can also be used in the control conducting refrigerant of electromagnetic switch valve 5 and backflows pipeline with pressure release；
And then, when pressure at expulsion P1 allows the lower threshold value of pressure at expulsion range less than second, controller can control electromagnetic switch valve 5
Shutdown refrigerant backflows pipeline.
Preferably, second allows pressure at expulsion range to be 3.3Mpa~3.6Mpa.
That is, in 100 normal heating process of air-conditioning system, when the computing module comparative analysis of controller is to compression
When the numerical value of the pressure at expulsion P1 of machine 11 is greater than the upper threshold value that second allows pressure at expulsion range, it was demonstrated that compressor 11 is in height
Press abnormality, controller can control the unlatching of electromagnetic switch valve 5 at this time, the exhaust pipe of compressor 11 and gas-liquid separator 15 into
Tracheae conducting, 11 pressure release of compressor is to reduce pressure at expulsion P1, the safety that enhancing air-conditioning system 100 is run.In pressure release
Cheng Zhong, when pressure at expulsion P1 deteriorates to less than the lower threshold value of the second permission pressure at expulsion range, the exhaust pipe of compressor 11 with
The air inlet pipe of gas-liquid separator 15 can stop being connected, thus avoid causing the capacity of compressor 11 too low because pressure release is excessive,
It ensure that the heating stability of air-conditioning system 100.
The present invention also provides a kind of machine readable storage medium, it is stored with instruction on the machine readable storage medium, this refers to
It enables for so that machine executes the heat-production control method of above-mentioned air-conditioning system.For example, the machine readable storage medium can be and write
There are chip or the micro computer etc. of the program of the heat-production control method of above-mentioned air-conditioning system.
In addition, referring to Fig. 2, which includes above-mentioned air-conditioning system the present invention also provides a kind of air-conditioning system
Heat control device.That is, air-conditioning system 100 is in addition to the main component with general heating air conditioner system, i.e. compressor
11, outside interior machine condenser 12, throttle valve 13, outer machine evaporator 14 and gas-liquid separator 15, it is additionally provided with the system of above-mentioned air-conditioning system
Heat control device.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (12)
1. a kind of heat-production control method of air-conditioning system, which is characterized in that the described method includes:
Data acquisition step (S0): under the heating mode of air-conditioning system, of the refrigerant in the exhaust pipe of compressor is obtained
One degree of superheat DSH1 and pressure at expulsion P1, gas-liquid separator exhaust pipe in the second degree of superheat SSH2 of refrigerant and described
The third degree of superheat ACSH3 of refrigerant in the air inlet pipe of gas-liquid separator；
Gas-liquid separator drain step (S1): when the pressure at expulsion P1 first allow pressure at expulsion within the scope of and described first
Degree of superheat DSH1 is in the first degree of superheat preset range, and second degree of superheat SSH2 is less than the second degree of superheat preset range
Lower threshold value and the third degree of superheat ACSH3 be less than third degree of superheat preset range lower threshold value when, by the compressor
Exhaust pipe in refriger-ant section branch in the air inlet pipe of the gas-liquid separator to promote the gas-liquid separator drain；
Compressor blowdown step (S2): air-conditioning system is in a heating mode in normal course of operation, when the pressure at expulsion P1 is big
In second allow pressure at expulsion range upper threshold value when, by the refriger-ant section pressure release in the exhaust pipe of the compressor to described
In the air inlet pipe of gas-liquid separator.
2. the method according to claim 1, wherein the gas-liquid separator drain step further include:
After refriger-ant section in the exhaust pipe of the compressor to be branched to the air inlet pipe of the gas-liquid separator, as the row
Atmospheric pressure P1 is greater than the upper threshold value that described first allows pressure at expulsion range or first degree of superheat DSH1 is greater than described first
The upper threshold value of degree of superheat preset range or second degree of superheat SSH2 are greater than the upper-level threshold of second degree of superheat preset range
When value or the third degree of superheat ACSH3 are greater than the upper threshold value of the third degree of superheat preset range, stop the compressor
Exhaust pipe in refrigerant branch in the air inlet pipe of the gas-liquid separator.
3. the method according to claim 1, wherein it is described first allow pressure at expulsion range be 2.2Mpa~
2.6Mpa, 25 DEG C~35 DEG C of first degree of superheat preset range, second degree of superheat preset range is 3 DEG C~5 DEG C, described
Third degree of superheat preset range is 4 DEG C~5 DEG C.
4. the method according to claim 1, wherein the compressor blowdown step further include:
After in the air inlet pipe of the refriger-ant section pressure release in the exhaust pipe of the compressor to the gas-liquid separator, when described
When pressure at expulsion P1 allows the lower threshold value of pressure at expulsion range less than second, stop the refrigeration in the exhaust pipe of the compressor
In agent pressure release to the air inlet pipe of the gas-liquid separator.
5. according to the method described in claim 4, it is characterized in that, it is described second allow pressure at expulsion range be 3.3Mpa~
3.6Mpa。
6. a kind of heating control device of air-conditioning system, which is characterized in that described device includes first pressure sensor (21),
One temperature sensor (22), second pressure sensor (31), second temperature sensor (32), third pressure sensor (41),
Three-temperature sensor (42) and controller, the exhaust pipe of the compressor (11) of the air-conditioning system and the gas of the air-conditioning system
It is connected with refrigerant between the air inlet pipe of liquid/gas separator (15) to backflow pipeline, the refrigerant backflows and is equipped with electromagnetic switch in pipeline
Valve (5), in which:
The first pressure sensor, the pressure at expulsion of the refrigerant in exhaust pipe for acquiring the compressor；
First temperature sensor, the refrigerant temperature in exhaust pipe for acquiring the compressor；
The second pressure sensor, the pressure at expulsion of the refrigerant in exhaust pipe for acquiring the gas-liquid separator；
The second temperature sensor, the refrigerant temperature in exhaust pipe for acquiring the gas-liquid separator；
The third pressure sensor, the admission pressure of the refrigerant in air inlet pipe for acquiring the gas-liquid separator；
The third temperature sensor, the refrigerant temperature in air inlet pipe for acquiring the gas-liquid separator；
The controller, is configured to:
Under the heating mode of air-conditioning system, the first pressure sensor, the first temperature sensor, second pressure sensing are received
Device, second temperature sensor, third pressure sensor, third temperature sensor acquisition signal to obtain the row of the compressor
The first degree of superheat DSH1 and pressure at expulsion P1 of endotracheal refrigerant, refrigerant in the exhaust pipe of the gas-liquid separator
The third degree of superheat ACSH3 of refrigerant in the air inlet pipe of second degree of superheat SSH2 and the gas-liquid separator；And
When the pressure at expulsion P1 is within the scope of the first permission pressure at expulsion and first degree of superheat DSH1 is in first mistake
In temperature preset range, and second degree of superheat SSH2 is less than lower threshold value and the institute of second degree of superheat preset range
When stating lower threshold value of the third degree of superheat ACSH3 less than the third degree of superheat preset range, the electromagnetic switch valve conducting is controlled
The refrigerant backflows pipeline to promote the gas-liquid separator drain；And
Air-conditioning system in normal course of operation, allows pressure at expulsion model when the pressure at expulsion P1 is greater than second in a heating mode
When the upper threshold value enclosed, controls the electromagnetic switch valve conducting refrigerant and backflow pipeline with pressure release.
7. heating control device according to claim 6, which is characterized in that the controller is further configured to:
When the control conducting refrigerant backflows pipeline with drain, allow exhaust pressure when the pressure at expulsion P1 is greater than described first
The upper threshold value of power range or first degree of superheat DSH1 are greater than the upper threshold value or described of first degree of superheat preset range
Second degree of superheat SSH2 is greater than the upper threshold value of second degree of superheat preset range or the third degree of superheat ACSH3 is greater than institute
When stating the upper threshold value of third degree of superheat preset range, controls refrigerant described in the electromagnetic switch valve breakdown and backflow pipeline.
8. heating control device according to claim 6, which is characterized in that it is described first permission pressure at expulsion range be
2.2Mpa~2.6Mpa, first degree of superheat preset range are 25 DEG C~35 DEG C, and second degree of superheat preset range is 3 DEG C
~5 DEG C, the third degree of superheat preset range is 4 DEG C~5 DEG C.
9. heating control device according to claim 8, which is characterized in that the controller is further configured to:
When the control conducting refrigerant backflows pipeline with pressure release, when the pressure at expulsion P1 allows pressure at expulsion model less than second
When the lower threshold value enclosed, controls refrigerant described in the electromagnetic switch valve breakdown and backflow pipeline.
10. heating control device according to claim 8, which is characterized in that it is described second permission pressure at expulsion range be
3.3Mpa~3.6Mpa.
11. a kind of machine readable storage medium, which is characterized in that instruction is stored on the machine readable storage medium, it is described
Instruction is used for so that method described in any one of machine perform claim requirement 1~5.
12. a kind of air-conditioning system, which is characterized in that the air-conditioning system includes system described in any one of claim 6~10
Heat control device.
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| CN111839713B (en) * | 2019-04-24 | 2023-03-24 | 上海美杰医疗科技有限公司 | Multi-modal tumor ablation probe system and control method thereof |
| CN110260553B (en) * | 2019-06-10 | 2021-12-21 | 广东美的制冷设备有限公司 | Air conditioner and control method thereof |
| CN113280485B (en) * | 2021-05-31 | 2022-08-26 | 广东美的制冷设备有限公司 | Air conditioner sterilization control method and device and air conditioner |
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| CN105928266B (en) * | 2016-05-23 | 2018-06-05 | 广东美的暖通设备有限公司 | Multi-line system and its control method for heating restricting element |
| CN106500392A (en) * | 2016-10-25 | 2017-03-15 | 青岛海信日立空调系统有限公司 | A kind of air conditioner circulating system and its control method and air-conditioning |
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