CN107588573A - Air-conditioning, compressor protection method, computer equipment and readable storage medium storing program for executing - Google Patents
Air-conditioning, compressor protection method, computer equipment and readable storage medium storing program for executing Download PDFInfo
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- CN107588573A CN107588573A CN201710785374.2A CN201710785374A CN107588573A CN 107588573 A CN107588573 A CN 107588573A CN 201710785374 A CN201710785374 A CN 201710785374A CN 107588573 A CN107588573 A CN 107588573A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The present invention proposes a kind of air-conditioning, compressor protection method, computer equipment and computer-readable recording medium, wherein, air-conditioning includes：Compressor, the First Heat Exchanger being connected by the first pipeline with the exhaust outlet of compressor, the second heat exchanger being connected by the second pipeline with the gas returning port of compressor and the first throttle device between First Heat Exchanger and the second heat exchanger, in addition to：3rd pipeline, one end connection gas returning port of the 3rd pipeline, the other end of the 3rd pipeline are connected to the second pipeline；By-passing valve, on the 3rd pipeline, when the compression ratio of compressor is not less than predetermined threshold value, by-passing valve turns on the 3rd pipeline.By technical scheme, reduce the machine stop times of compressor, be advantageous to the stable output of air-conditioning.
Description
Technical field
The present invention relates to field of air conditioning, in particular to a kind of air-conditioning, a kind of compressor protection method, a kind of calculating
Machine equipment and a kind of computer-readable recording medium.
Background technology
Core component of the compressor as air-conditioning refrigeration system, its stable operation are the guarantees that air-conditioning realizes its function,
When air conditioner low temperature heating is run, there is the excessive situation of compression ratio in compressor, and now pressure at expulsion can raise, so as to be vented temperature
The scope that degree is allowed beyond compressor, now lubricating oil and refrigerant may carbonize decomposition, influence compressor and unit
Stable operation.
At present, the compressor operating areal map typically provided according to producer, detection pressure are provided to compressor of air conditioner
Contracting machine outlet air temperature, when outlet air temperature exceeds range of operation, compressor shutdown, but under some operating modes, compressor frequency
Numerous startup-shutdown, the stable output of air-conditioner set was both influenceed, and also influenceed the service life of compressor.
The content of the invention
It is contemplated that at least solves one of technical problem present in prior art or correlation technique.
Therefore, it is an object of the present invention to propose a kind of air-conditioning.
Another object of the present invention is to propose a kind of compressor protection method.
A further object of the present invention is to propose a kind of computer equipment.
A further object of the present invention is to propose a kind of computer-readable recording medium.
In view of this, the technical scheme of first aspect present invention proposes a kind of air-conditioning, including：Compressor, pass through first
First Heat Exchanger that pipeline is connected with the exhaust outlet of compressor, second to be connected by the second pipeline with the gas returning port of compressor are changed
Hot device and the first throttle device between First Heat Exchanger and the second heat exchanger, in addition to：3rd pipeline, the 3rd pipeline
One end connection air inlet, the other end of the 3rd pipeline is connected to the second pipeline；By-passing valve, on the 3rd pipeline, compressing
When the compression ratio of machine is not less than predetermined threshold value, by-passing valve turn on the 3rd pipeline, wherein, exhaust outlet be provided with back pressure transducer and
Exhaust gas temperature sensor, gas returning port are provided with back pressure sensor, the exhaust pressure that compression ratio is determined by back pressure transducer
The back pressure value of force value and back pressure sensor measure determines.
In the technical scheme, air-conditioning includes compressor, First Heat Exchanger, first throttle device, the second heat exchanger, bypass
Valve, First Heat Exchanger are connected by the first pipeline with the exhaust outlet of compressor, and the second heat exchanger passes through the second pipeline and compressor
Gas returning port be connected, and be connected to form closed-loop path with first throttle device.
When air-conditioning heating is run, refrigerant is pressurizeed by compressor, turns into high temperature and high pressure gas, passes through the exhaust of compressor
Mouthful, enter First Heat Exchanger through four-way valve, condensation liquefaction heat release, turn into liquid, while room air is heated, liquid is through first
Throttling arrangement depressurizes, and into the second heat exchanger, evaporation gasification heat absorption, turns into gaseous state, while draws the heat of outdoor air, turns into
Gaseous refrigerant is again introduced into compressor starts subsequent cycle process by the gas returning port of compressor；By-passing valve be arranged on connect into
On 3rd pipeline of gas port and the second heat exchanger, when the compression ratio of compressor is not less than predetermined threshold value, by-passing valve conducting the 3rd
Pipeline, the pressure at expulsion of exhaust outlet of compressor is reduced, to reduce the compression ratio of compressor.
Wherein, exhaust outlet is provided with back pressure transducer, for measuring the exhaust pressure value of exhaust outlet of compressor, gas returning port
Provided with back pressure sensor, for measuring the back pressure value of compressor return air mouth, the pressure at expulsion that compression ratio passes through measure
The ratio of value and back pressure value determines.
It should be noted that when the compression ratio of compressor is not less than predetermined threshold value, by-passing valve turns on the 3rd pipeline, make from
The part high temperature and high pressure gas of exhaust outlet of compressor discharge can flow back to the gas returning port of compressor by by-passing valve, therefore reduce
The gas flow of First Heat Exchanger high temperature gases at high pressure, reduces condensing pressure, therefore reduces the exhaust of exhaust outlet of compressor
Pressure, so as to reduce the compression ratio of compressor.
In addition, it should also be noted that, first throttle device, which can be capillary, heating power expansion valve etc., has throttling action
Device.
In addition it is also necessary to the reason for illustrating, causing pressure at expulsion too high is that condensing pressure is too high, condenser radiating surface
Product deficiency, cooling air quantity or water shortage, cooling water or air themperature too Gao Junke cause condensing pressure too high, can pass through drop
Low condensing pressure reduces pressure at expulsion, and reduce condensing pressure can be by increasing condenser area of dissipation, increase cooling wind
Amount or water, cooling water or air themperature are reduced to realize.
In the above-mentioned technical solutions, it is preferable that also include：Gas-liquid separator, on the second pipeline, the 3rd pipeline it is another
One end is connected between gas-liquid separator and the second heat exchanger.
In the technical scheme, gas-liquid separator is arranged on the second pipeline, and the other end of the 3rd pipeline is connected to gas-liquid
Between separator and the second heat exchanger so that air-conditioning is in heating operation, from the gas-liquid mixed state refrigerant of the second heat exchanger out
After flowing through gas-liquid separator, the gas returning port that the gaseous coolant after gas-liquid separation enters compressor is carried out, carries out next heating circulation
Process.
In the above-mentioned technical solutions, it is preferable that exhaust outlet is provided with exhaust gas temperature sensor, and air-conditioning also includes：4th pipeline,
One end of 4th pipeline is connected with compressor, the other end of the 4th pipeline be connected to First Heat Exchanger and first throttle device it
Between；Magnetic valve, on the 4th pipeline, the delivery temperature that exhaust gas temperature sensor detects be not less than default delivery temperature and
When by-passing valve turns on three pipelines, the pipeline of solenoid valve conduction the 4th, second throttling device, the 4th pipeline is series at magnetic valve
On.
In the technical scheme, one end of the 4th pipeline is connected with compressor, and the other end of the 4th pipeline is connected to first
Magnetic valve is arranged on the 4th pipeline of connection compressor and First Heat Exchanger between heat exchanger and first throttle device, works as bypass
After valve conducting certain time, the compression ratio of now compressor is detected, if the compression ratio of compressor is not less than predetermined threshold value and passes through
When the delivery temperature that exhaust gas temperature sensor detects is not less than default delivery temperature, the pipeline of solenoid valve conduction the 4th, to compression
Machine carries out Liquid injection cooling, reduces the delivery temperature of compressor, so that it is reduced to the normal operation range of compressor, wherein, row
Gas port is provided with back pressure transducer and exhaust gas temperature sensor, for measuring exhaust pressure value and the exhaust of exhaust outlet of compressor
Temperature, gas returning port is provided with back pressure sensor, for measuring the back pressure value of compressor return air mouth, the compression ratio of compressor
The back pressure value determination that the exhaust pressure value and back pressure sensor determined by back pressure transducer determines, compressor
Compression ratio be the ratio of exhaust pressure value and back pressure value, when compressor pressure ratios are excessive, illustrate that pressure at expulsion is excessive
Or back pressure is too small；The HTHP that the second throttling device being arranged on the 4th pipeline can discharge to exhaust outlet of compressor
Gas is throttled, and reduces the operating pressure of the second heat exchanger, to reduce pressure at expulsion, reduces compression ratio.
By above-mentioned technical scheme, realize and compressor is protected by controlling the compression ratio of compressor, drop
Low compressor reduces machine stop times, is advantageous to air-conditioning because compression ratio is excessive, excessive discharge temperature and the possibility shut down
The stable output of unit.
It should be noted that predetermined threshold value and default delivery temperature are in the range of it can realize compressor stable operation
Set, when the compression ratio of compressor exceedes the delivery temperature of predetermined threshold value or exhaust outlet more than default delivery temperature,
Lubricating oil and refrigerant may decompose carbonization, influence the stable operation of compressor system and system.
In addition, it should also be noted that, second throttling device can be capillary, heating power expansion valve and wait with throttling work
Device.
In the above-mentioned technical solutions, it is preferable that not small in the compression ratio of compressor when First Heat Exchanger is water cooling heat exchanger
When predetermined threshold value, reduce the leaving water temperature of water cooling heat exchanger, the water inlet and delivery port of water cooling heat exchanger set respectively into
Water temperature sensor and leaving water temperature sensors, leaving water temperature are determined by leaving water temperature sensors.
In the technical scheme, if First Heat Exchanger is water cooling heat exchanger, it is not less than default threshold in the compression ratio of compressor
During value, by reducing the leaving water temperature of water cooling heat exchanger, to increase the temperature difference of First Heat Exchanger, so as to increase First Heat Exchanger
Capacity of heat transmission, First Heat Exchanger is absorbed more heats, improve the evaporating temperature of refrigerant, raise back pressure, enter
And reduce the compression ratio of compressor, compressor is reduced to cross the possibility of high compression ratio operation, is realized for compressor
Protection, wherein the water inlet of heat exchanger and delivery port set inflow temperature sensor and leaving water temperature sensors respectively, to survey
Measure the inflow temperature and leaving water temperature of heat exchanger.
In the above-mentioned technical solutions, it is preferable that when First Heat Exchanger is air cooling heat exchanger, air cooling heat exchanger includes fan,
When the compression ratio of compressor is not less than predetermined threshold value, the operation power of fan is improved.
In the technical scheme, if First Heat Exchanger is air cooling heat exchanger, it is not less than default threshold in the compression ratio of compressor
During value, by improving the operation power of fan, increase the temperature difference of First Heat Exchanger, so as to increase the heat transfer of First Heat Exchanger
Ability, First Heat Exchanger is absorbed more heats, improve the evaporating temperature of refrigerant, raise back pressure, and then reduce pressure
Contracting ratio, compressor is reduced to cross the possibility of high compression ratio operation, realizes the protection for compressor.
The technical scheme of second aspect of the present invention proposes a kind of compressor protection method, for air-conditioning, including：In air-conditioning
After heating state the first preset time of operation, the first compression ratio of compressor is determined；If the first compression ratio is not less than default threshold
Value, then improve the exchange capability of heat of First Heat Exchanger in air-conditioning；After running for the second time in air-conditioning with the exchange capability of heat after improving, really
Determine the second compression ratio of compressor；If the second compression ratio is not less than predetermined threshold value, by-passing valve is turned on；In the conducting of by-passing valve
Between reached for the 3rd time after, determine the 3rd compression ratio and delivery temperature of compressor；It is not less than predetermined threshold value in the 3rd compression ratio
And delivery temperature controls solenoid valve conduction, Liquid injection cooling is carried out to compressor when being not less than default delivery temperature.
In the technical scheme, air-conditioning after running the first preset time, reaches stable shape to heat state operation
State, now, the first compression ratio of compressor is determined, be easy to whether judge more than predetermined threshold value compression ratio；When the first pressure
When contracting is than being less than predetermined threshold value, air-conditioning continues to current operating conditions, when the first compression ratio is not less than predetermined threshold value, passes through
The exchange capability of heat of First Heat Exchanger in air-conditioning is improved, reduces compression ratio to be protected to compressor；After air-conditioning is to improve
After exchange capability of heat ran for the second time, the second compression ratio of compressor is determined, is easy to continue to judge compression ratio and predetermined threshold value
Magnitude relationship；When the second compression ratio is less than predetermined threshold value, air-conditioning continues to current operating conditions, when the second compression ratio is not small
When predetermined threshold value, by turning on by-passing valve, the pressure at expulsion of exhaust outlet of compressor is reduced, to reduce compression ratio；Work as by-passing valve
After turning on the 3rd preset time, the 3rd compression ratio and delivery temperature of compressor are determined, is easy to judge whether compression ratio exceedes in advance
If threshold value, whether delivery temperature is beyond the default delivery temperature set by compressor；When the 3rd compression ratio is less than predetermined threshold value,
Air-conditioning continues to current operating conditions, when the 3rd compression ratio is not less than predetermined threshold value and delivery temperature is not less than default exhaust temperature
When spending, solenoid valve conduction is controlled, Liquid injection cooling is carried out to compressor, the delivery temperature of exhaust outlet of compressor is reduced, so as to reduce
Pressure at expulsion, compression ratio is reduced, realize the protection for compressor, reduction compressor pressure ratios are excessive and cause the possibility shut down
Property.
By above-mentioned technical scheme, realize and compressor is protected by controlling the compression ratio of compressor, drop
Low compressor reduces machine stop times, is advantageous to air-conditioning because compression ratio is excessive, excessive discharge temperature and the possibility shut down
The stable output of unit.
It should be noted that the first preset time is to reach stable state institute during state operation according to air-conditioning to heat
What the time needed determined, the second preset time is the time required to lifting exchange capability of heat according to First Heat Exchanger and compressor pressure ratios
Determined jointly the time required to reducing, the 3rd preset time is the conducting speed by by-passing valve, the conduction amount of by-passing valve and
What compressor pressure ratios determined jointly the time required to reducing.
In addition, it should also be noted that, predetermined threshold value and default delivery temperature are can to realize compressor stable operation
In the range of set, the delivery temperature that predetermined threshold value or exhaust outlet are exceeded when the compression ratio of compressor exceedes default exhaust
During temperature, lubricating oil and refrigerant may decompose carbonization, influence the stable operation of compressor system and system.
In the above-mentioned technical solutions, it is preferable that after air-conditioning is to heat state the first preset time of operation, determine compressor
The first compression ratio specifically include：After air-conditioning heating runs the first preset time, the first exhaust pressure value of compressor is determined
With the first back pressure value；According to first exhaust pressure value and the first back pressure value, the first compression ratio of compressor is determined；
After air-conditioning ran for the second time with the exchange capability of heat after improving, determine that the second compression ratio of compressor specifically includes：Air-conditioning with
After exchange capability of heat after raising ran for the second time, the second exhaust pressure value and the second back pressure value of compressor are determined；Root
According to second exhaust pressure value and the second back pressure value, the second compression ratio of compressor is determined；Reached in the ON time of by-passing valve
To after the 3rd time, the 3rd compression ratio and delivery temperature that determine compressor specifically include：Reach in the ON time of by-passing valve
After 3rd time, the 3rd exhaust pressure value and the 3rd back pressure value of compressor are determined；According to the 3rd exhaust pressure value and
Three back pressure values, determine the 3rd compression ratio of compressor.
In the technical scheme, the compression ratio of compressor is the exhaust pressure value by compressor and the ratio of back pressure value
Determine, when air-conditioning is run to heat state, compressor is detected by the back pressure transducer for being arranged on exhaust outlet of compressor
Exhaust pressure value, by be arranged on compressor return air mouth back pressure sensor detect compressor back pressure value；When
After the preset time of operation of air conditioner first reaches stable state, first exhaust pressure value and the first back pressure are determined by sensor
Value, the first compression ratio of compressor is determined according to the ratio of first exhaust pressure value and the first back pressure value, when the first compression
During than less than predetermined threshold value, air-conditioning is continued to run with current state, when the first compression ratio is not less than predetermined threshold value, passes through reduction
The set water temperature of First Heat Exchanger, to increase the temperature difference of First Heat Exchanger both sides, so as to increase the heat transfer of First Heat Exchanger
Ability, First Heat Exchanger is absorbed more heats, improve the evaporating temperature of refrigerant, raise back pressure, and then reduce pressure
The compression ratio of contracting machine；After exchange capability of heat after air-conditioning is to improve ran for the second time, the second exhaust pressure of compressor is determined
Value and the second back pressure value, according to second exhaust pressure value and the second back pressure value, the second compression ratio of compressor is determined,
When the second compression ratio is less than predetermined threshold value, air-conditioning continues to current operating conditions, when the second compression ratio is not less than default threshold
During value, by turning on by-passing valve, the pressure at expulsion of exhaust outlet of compressor is reduced, to reduce compression ratio；When by-passing valve turns on the 3rd
After preset time, the 3rd exhaust pressure value and the 3rd back pressure value of compressor are determined, according to the 3rd exhaust pressure value and
Three back pressure values, the 3rd compression ratio of compressor is determined, when the 3rd compression ratio is less than predetermined threshold value, air-conditioning continues to work as
Preceding running status, when the 3rd compression ratio is more than predetermined threshold value, by the detection to delivery temperature, judge delivery temperature with presetting
The size of delivery temperature, with reference to the 3rd compression ratio and the magnitude relationship of predetermined threshold value, to determine that the adjustment of air-conditioning acts.
In the above-mentioned technical solutions, it is preferable that if the first compression ratio is not less than predetermined threshold value, first changes in raising air-conditioning
The exchange capability of heat of hot device, is specifically included：If First Heat Exchanger is water cooling heat exchanger, it is not less than predetermined threshold value in the first compression ratio
When, control water cooling heat exchanger reduces leaving water temperature；If First Heat Exchanger is air cooling heat exchanger, in the first compression ratio not less than pre-
If during threshold value, improve the operation power of the fan of air cooling heat exchanger.
In the technical scheme, if First Heat Exchanger is water cooling heat exchanger, it is not less than in the first compression ratio of compressor pre-
If during threshold value, by reducing the leaving water temperature of water cooling heat exchanger, to increase the temperature difference of First Heat Exchanger heat exchange both sides, so as to increase
Add the capacity of heat transmission of water cooling heat exchanger, First Heat Exchanger is absorbed more heats, improve the evaporating temperature of refrigerant, make return-air
Pressure rise, and then reduce the compression ratio of compressor, compressor is reduced to cross the possibility of high compression ratio operation, is realized pair
In the protection of compressor.
Wherein the water inlet of heat exchanger and delivery port set inflow temperature sensor and leaving water temperature sensors respectively, so as to
Measure the inflow temperature and leaving water temperature of heat exchanger.
In addition, if First Heat Exchanger is air cooling heat exchanger, when the compression ratio of compressor is not less than predetermined threshold value, by carrying
The operation power of the fan of high air cooling heat exchanger, the temperature difference of increase First Heat Exchanger both sides, so as to increase air cooling heat exchanger
Capacity of heat transmission, First Heat Exchanger is absorbed more heats, improve the evaporating temperature of refrigerant, raise back pressure, and then
Reduce compression ratio, reduce compressor to cross the possibility of high compression ratio operation, realize the protection for compressor.
In the above-mentioned technical solutions, it is preferable that also include：It is not less than predetermined threshold value in the 3rd compression ratio and delivery temperature is small
When preset temperature, control compressor performs stoppage protection.
In the technical scheme, when the 3rd compression ratio is more than predetermined threshold value and delivery temperature is less than default delivery temperature,
Illustrating, which reduces delivery temperature, has not reached the effect for reducing compressor pressure ratios, and now, compressor pressure ratios exceed default threshold
Value, compressor is out of service, realizes the protection for compressor.
In the above-mentioned technical solutions, it is preferable that also include：After terminating to compressor liquid-spraying cooling, compressor is determined
4th compression ratio；When the 4th compression ratio is not less than predetermined threshold value, control compressor performs stoppage protection.
In the technical scheme, after terminating to compressor liquid-spraying cooling, the 4th compression ratio of compressor is determined, if compression
4th compression ratio of machine is still not less than predetermined threshold value, then explanation carries out Liquid injection cooling to compressor can not also reduce compressor
Compression ratio, now compressor is out of service, so as to realize the protection for compressor.
The technical scheme of third aspect present invention proposes a kind of computer equipment, including memory, processor and storage
On a memory and the computer program that can run on a processor, any of the above-described is performed during computing device computer program
Compressor protection method.
In the technical scheme, the computer program for performing the compressor protection method of any of the above-described is stored in memory
On, during computing device computer program, the compressor protection method of any of the above-described can be achieved, therefore there is any of the above-described skill
Whole beneficial effects of compressor protection method, will not be repeated here in art scheme.
The technical scheme of fourth aspect present invention proposes a kind of computer-readable recording medium, is stored thereon with computer
Program, the compressor protection method of any of the above-described is realized when computer program is executed by processor.
In the technical scheme, processor realizes that compressor protection method as above is needed by computer program, this
Computer program needs to be stored in computer-readable medium.This computer-readable medium enable computer program by
Computing device, it is achieved thereby that the compressor protection method of any of the above-described, therefore have in any of the above-described technical scheme and press
Whole beneficial effects of method for protecting compressor, will not be repeated here.
The additional aspect and advantage of the present invention will become obvious in following description section, or the practice by the present invention
Recognize.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 shows the structural representation of air-conditioning according to an embodiment of the invention；
Fig. 2 shows the structural representation of air-conditioning according to still a further embodiment；
Fig. 3 shows the schematic flow sheet of compressor protection method according to an embodiment of the invention；
Fig. 4 shows the structural representation of computer equipment according to an embodiment of the invention；
Fig. 5 shows the schematic flow sheet of compressor protection method according to still a further embodiment；
Fig. 6 shows the schematic flow sheet of compressor protection method according to still another embodiment of the invention；
Fig. 7 shows the control logic figure of compressor protection method according to still another embodiment of the invention.
Embodiment
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Mode is applied the present invention is further described in detail.It should be noted that in the case where not conflicting, the implementation of the application
Feature in example and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be different from other modes described here using other to implement, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Embodiment one：
Fig. 1 shows the structural representation of air-conditioning 100 according to an embodiment of the invention.
As shown in figure 1, air-conditioning 100 according to an embodiment of the invention, including：Compressor 102, pass through the first pipeline
The First Heat Exchanger 104 that is connected with the exhaust outlet of compressor, second to be connected by the second pipeline with the gas returning port of compressor are changed
Hot device 106 and the first throttle device 108 between First Heat Exchanger and the second heat exchanger, in addition to：3rd pipeline, the
One end connection air inlet of three pipelines, the other end of the 3rd pipeline are connected to the second pipeline；By-passing valve 110, located at the 3rd pipeline
On, when the compression ratio of compressor is not less than predetermined threshold value, by-passing valve 110 turns on the 3rd pipeline, wherein, exhaust outlet is provided with exhaust
Pressure sensor 112, gas returning port are provided with back pressure sensor 114, the row that compression ratio is determined by back pressure transducer 112
The back pressure value that air pressure force value and back pressure sensor 114 determine determines.
In this embodiment, air-conditioning includes compressor 102, First Heat Exchanger 104, the second heat exchanger 106, first throttle dress
108, by-passing valve 110 is put, First Heat Exchanger 104 is connected by the first pipeline with the exhaust outlet of compressor 102, the second heat exchanger
106 are connected by the second pipeline with the gas returning port of compressor 102, and are connected to form closed-loop path with first throttle device 108.
In 100 heating operation of air-conditioning, i.e. a mouths of four-way valve are connected with b mouths, and c mouths are connected with d mouths, and refrigerant is pressed
Contracting machine 102 pressurizes, and turns into high temperature and high pressure gas, by the exhaust outlet of compressor 102, enters First Heat Exchanger 104 through four-way valve,
Condensation liquefaction heat release, turn into liquid, while room air is heated, liquid depressurizes through first throttle device 108, is changed into second
Hot device 106, evaporation gasification heat absorption, turns into gaseous state, while draws the heat of outdoor air, turns into gaseous refrigerant and passes through compressor
102 gas returning port is again introduced into compressor 102 and starts subsequent cycle process；By-passing valve 110 is arranged on connection air inlet and second
On 3rd pipeline of heat exchanger 106, when the compression ratio of compressor 102 is not less than predetermined threshold value, the pipe of the conducting of by-passing valve 108 the 3rd
Road, the pressure at expulsion of the exhaust outlet of compressor 102 is reduced, to reduce the compression ratio of compressor 102.
Wherein, exhaust outlet is provided with back pressure transducer 112, for measuring the exhaust pressure value of exhaust outlet of compressor, returns
Gas port is provided with back pressure sensor 114, for measuring the back pressure value of compressor return air mouth, the row that compression ratio passes through measure
The ratio of air pressure force value and back pressure value determines.
It should be noted that when the compression ratio of compressor 102 is not less than predetermined threshold value, the pipe of the conducting of by-passing valve 110 the 3rd
Road, the part high temperature and high pressure gas from the discharge of the exhaust outlet of compressor 102 are allow to flow back to compressor 102 by by-passing valve 110
Gas returning port, therefore the gas flow of the high temperature gases at high pressure of First Heat Exchanger 104 is reduced, condensing pressure is reduced, therefore reduce
The pressure at expulsion of the exhaust outlet of compressor 102, so as to reduce the compression ratio of compressor.
In addition, it should also be noted that, first throttle device 108, which can be capillary, heating power expansion valve etc., has throttling
The device of effect.
In addition it is also necessary to the reason for illustrating, causing pressure at expulsion too high is that condensing pressure is too high, condenser radiating surface
Product deficiency, cooling air quantity or water shortage, cooling water or air themperature too Gao Junke cause condensing pressure too high, can pass through drop
Low condensing pressure reduces pressure at expulsion, and reduce condensing pressure can be by increasing condenser area of dissipation, increase cooling wind
Amount or water, cooling water or air themperature are reduced to realize.
In the above embodiment, it is preferable that also include：Gas-liquid separator 116, on the second pipeline, the 3rd pipeline
The other end is connected between the heat exchanger 106 of gas-liquid separator 116 and second.
In this embodiment, gas-liquid separator 116 is arranged on the second pipeline, and the other end of the 3rd pipeline is connected to gas-liquid
Between the heat exchanger 106 of separator 116 and second so that air-conditioning 100 is in heating operation, from the gas of the second heat exchanger 106 out
After liquid mixed state refrigerant flows through gas-liquid separator, the gas returning port that the gaseous coolant after gas-liquid separation enters compressor 102 is carried out, is entered
The next heating cyclic process of row.
Embodiment two：
Fig. 2 shows the structural representation of air-conditioning 100 according to an embodiment of the invention.
As shown in Fig. 2 the structural representation of air-conditioning 100 according to an embodiment of the invention, exhaust outlet are provided with row
Gas temperature sensor 118, air-conditioning 100 also include：4th pipeline, one end of the 4th pipeline are connected with compressor 102, the 4th pipeline
The other end be connected between First Heat Exchanger and first throttle device 108；Magnetic valve 120, on the 4th pipeline, compressing
When the delivery temperature of machine 102 is not less than default delivery temperature and three pipeline of conducting of by-passing valve 110, the conducting of magnetic valve 120 the 4th
Pipeline, second throttling device 122, it is series at magnetic valve 120 on the 4th pipeline.
In this embodiment, one end of the 4th pipeline is connected with compressor 102, and the other end of the 4th pipeline is connected to first
Magnetic valve 120 is arranged on the of connection compressor 102 and First Heat Exchanger 104 between heat exchanger 104 and first throttle device 108
On four pipelines, after by-passing valve 110 turns on certain time, the compression ratio of now compressor 102 is detected, if the pressure of compressor 102
Contracting is not less than default delivery temperature than the delivery temperature detected not less than predetermined threshold value and by exhaust gas temperature sensor 118
When, magnetic valve 120 turns on the 4th pipeline, carries out Liquid injection cooling to compressor 102, reduces the delivery temperature of compressor 102, so that
It is reduced to the normal operation range of compressor, wherein, exhaust outlet is provided with back pressure transducer 112 and exhaust gas temperature sensor
118, for measuring the exhaust pressure value and delivery temperature of exhaust outlet of compressor, gas returning port is provided with back pressure sensor 114, uses
In the back pressure value of measurement compressor return air mouth, row that the compression ratio of compressor 102 is determined by back pressure transducer 112
The back pressure value of air pressure force value and back pressure sensor measure determines, the compression ratio of compressor 102 for exhaust pressure value with
The ratio of back pressure value, when the compression ratio of compressor 102 is excessive, illustrate that pressure at expulsion is excessive or back pressure is too small；If
The high temperature and high pressure gas that putting the second throttling device 122 on the 4th pipeline can discharge to the exhaust outlet of compressor 102 save
Stream, the operating pressure of First Heat Exchanger 104 is reduced, to reduce pressure at expulsion, reduce compression ratio.
It should be noted that predetermined threshold value and default delivery temperature are can to realize the model of the stable operation of compressor 102
Enclose it is interior set, the delivery temperature that predetermined threshold value or exhaust outlet are exceeded when the compression ratio of compressor 102 exceedes default exhaust
During temperature, lubricating oil and refrigerant may decompose carbonization, influence the stable operation of compressor system and system.
In addition, it should also be noted that, second throttling device 122 can be capillary, heating power expansion valve and wait with section
The device of stream effect.
In the above embodiment, it is preferable that when First Heat Exchanger 104 is water cooling heat exchanger, in the compression ratio of compressor 102
During not less than predetermined threshold value, the leaving water temperature of water cooling heat exchanger is reduced, is set respectively in the water inlet and delivery port of water cooling heat exchanger
Inflow temperature sensor 124 and leaving water temperature sensors 126 are put, leaving water temperature is determined by leaving water temperature sensors 126.
In this embodiment, if First Heat Exchanger 104 is water cooling heat exchanger, it is not less than in the compression ratio of compressor 102 pre-
If during threshold value, by reducing the leaving water temperature of water cooling heat exchanger, to increase the temperature difference of First Heat Exchanger 104, so as to increase by
The capacity of heat transmission of one heat exchanger, First Heat Exchanger 104 is absorbed more heats, improve the evaporating temperature of refrigerant, make return-air
Pressure rise, and then reduce the compression ratio of compressor 102, compressor 102 is reduced to cross the possibility of high compression ratio operation, it is real
The protection for compressor 102 is showed, the wherein water inlet of heat exchanger and delivery port sets the He of inflow temperature sensor 124 respectively
Leaving water temperature sensors 126, to measure the inflow temperature of heat exchanger and leaving water temperature.
In the above embodiment, it is preferable that when First Heat Exchanger 104 is air cooling heat exchanger, air cooling heat exchanger includes fan,
When the compression ratio of compressor 102 is not less than predetermined threshold value, the operation power of fan is improved.
In this embodiment, if First Heat Exchanger 104 is air cooling heat exchanger, it is not less than in the compression ratio of compressor 102 pre-
If during threshold value, by improving the operation power of fan, increase the temperature difference of First Heat Exchanger 104, so as to increase First Heat Exchanger
Capacity of heat transmission, First Heat Exchanger 104 is absorbed more heats, improve the evaporating temperature of refrigerant, raise back pressure,
And then reduce compression ratio, compressor 102 is reduced to cross the possibility of high compression ratio operation, is realized for compressor 102
Protection.
Embodiment three：
Fig. 3 shows the schematic flow sheet of compressor protection method according to an embodiment of the invention.
As shown in figure 3, compressor protection method according to an embodiment of the invention, including：
Step S302, after air-conditioning heating runs the first preset time, determine the first exhaust pressure value and the of compressor
One back pressure value；
Step S304, according to first exhaust pressure value and the first back pressure value, determine the first compression ratio of compressor；
Step S306, if the first compression ratio is not less than predetermined threshold value, improve the exchange capability of heat of First Heat Exchanger in air-conditioning；
Step S308, after running for the second time in air-conditioning with the exchange capability of heat after improving, determine the second exhaust of compressor
Pressure value and the second back pressure value；
Step S310, according to second exhaust pressure value and the second back pressure value, determine the second compression ratio of compressor；
Step S312, if the second compression ratio is not less than predetermined threshold value, turn on by-passing valve；
Step S314, after the ON time of by-passing valve reached for the 3rd time, determine the 3rd exhaust pressure value of compressor
With the 3rd back pressure value；
Step S316, according to the 3rd exhaust pressure value and the 3rd back pressure value, determine the 3rd compression ratio of compressor；
Step S318, when the 3rd compression ratio is not less than predetermined threshold value and delivery temperature is not less than default delivery temperature, control
Solenoid valve conduction processed, Liquid injection cooling is carried out to compressor.
In this embodiment, after the preset time of operation of air conditioner first reaches stable state, is determined by step S302
One exhaust pressure value and the first back pressure value, by step S304 according to first exhaust pressure value and the first back pressure value
Ratio determines the first compression ratio of compressor, and when the first compression ratio is less than predetermined threshold value, air-conditioning is continued to run with current state；
When the first compression ratio is not less than predetermined threshold value, the exchange capability of heat of First Heat Exchanger in air-conditioning is improved by step S306, is reduced
Compression ratio to compressor to protect；After running for the second time in air-conditioning with the exchange capability of heat after improving by step S308,
The second exhaust pressure value and the second back pressure value of compressor are determined, by step S310 according to second exhaust pressure value and
Two back pressure values, the second compression ratio of compressor is determined, be easy to continue the magnitude relationship for judging compression ratio and predetermined threshold value, when
When second compression ratio is less than predetermined threshold value, air-conditioning continues to current operating conditions；When the second compression ratio is not less than predetermined threshold value
When, by-passing valve is turned on by step S312, the pressure at expulsion of exhaust outlet of compressor is reduced, to reduce compression ratio；Pass through step
S314 determines the 3rd exhaust pressure value and the 3rd back pressure value of compressor after by-passing valve turns on the 3rd preset time, leads to
Step S316 is crossed according to the 3rd exhaust pressure value and the 3rd back pressure value, determines the 3rd compression ratio of compressor, when the 3rd pressure
When contracting is than being less than predetermined threshold value, air-conditioning continues to current operating conditions；When the 3rd compression ratio is more than predetermined threshold value, by right
The detection of delivery temperature, the size of delivery temperature and default delivery temperature is judged, with reference to the big of the 3rd compression ratio and predetermined threshold value
Small relation, to determine that the adjustment of air-conditioning acts；Predetermined threshold value and delivery temperature are not less than in the 3rd compression ratio by step S318
During not less than default delivery temperature, solenoid valve conduction is controlled, Liquid injection cooling, the row for reducing exhaust outlet of compressor are carried out to compressor
Temperature degree, so as to reduce pressure at expulsion, compression ratio is reduced, realizes the protection for compressor, it is excessive to reduce compressor pressure ratios
And cause the possibility shut down.
It should be noted that the compression ratio of compressor is true by the exhaust pressure value and the ratio of back pressure value of compressor
Fixed, when air-conditioning is run with heating state, by being arranged on the back pressure transducer of exhaust outlet of compressor and being arranged on compression
The exhaust pressure value and back pressure value of the back pressure sensor detection compressor of machine gas returning port, the leaving water temperature of heat-exchanger rig
Measured by leaving water temperature sensors, delivery temperature is measured by exhaust gas temperature sensor.
In addition, it should also be noted that, when the compression ratio of compressor is not less than predetermined threshold value, by-passing valve conducting the 3rd is managed
Road, the part high temperature and high pressure gas allow from exhaust outlet of compressor discharge flow back to by by-passing valve the gas returning port of compressor, because
This reduces the gas flow of First Heat Exchanger high temperature gases at high pressure, reduces condensing pressure, therefore reduce compressor air-discharging
The pressure at expulsion of mouth, so as to reduce the compression ratio of compressor.
In addition it is also necessary to explanation, the first preset time is to reach operation surely during state operation according to air-conditioning to heat
Determine what the time needed for state determined, the second preset time is the time required to lifting exchange capability of heat according to First Heat Exchanger and compression
What machine compression ratio determined jointly the time required to reducing, the 3rd preset time is the conducting speed by by-passing valve, and by-passing valve is led
What flux and compressor pressure ratios determined jointly the time required to reducing.
In addition it is also necessary to explanation, predetermined threshold value and default delivery temperature are can to realize compressor stable operation
In the range of set, the delivery temperature that predetermined threshold value or exhaust outlet are exceeded when the compression ratio of compressor exceedes default exhaust
During temperature, lubricating oil and refrigerant may decompose carbonization, influence the stable operation of compressor system and system.
In the above embodiment, it is preferable that step S306 is specifically included：If First Heat Exchanger is water cooling heat exchanger,
When first compression ratio is not less than predetermined threshold value, control water cooling heat exchanger reduces leaving water temperature；If First Heat Exchanger is air-cooled heat exchange
Device, then when the first compression ratio is not less than predetermined threshold value, improve the operation power of the fan of air cooling heat exchanger.
In this embodiment, if First Heat Exchanger is water cooling heat exchanger, it is not less than in the first compression ratio of compressor default
During threshold value, by reducing the leaving water temperature of water cooling heat exchanger, to increase the temperature difference of First Heat Exchanger both sides, so as to increase by first
The capacity of heat transmission of heat exchanger, First Heat Exchanger is absorbed more heats, improve the evaporating temperature of refrigerant, make back pressure liter
Height, and then reduce the compression ratio of compressor, compressor is reduced to cross the possibility of high compression ratio operation, is realized for compression
The water inlet and delivery port of the protection of machine, wherein heat exchanger set inflow temperature sensor and leaving water temperature sensors respectively, with
Just the inflow temperature and leaving water temperature of heat exchanger are measured.
In addition, if First Heat Exchanger is water cooling heat exchanger, First Heat Exchanger can be increased by improving the operation power of fan
Temperature difference, so as to increase the capacity of heat transmission of First Heat Exchanger, First Heat Exchanger is absorbed more heats, improve refrigerant
Evaporating temperature, back pressure is raised, and then reduces compression ratio, reduce compressor to cross the possibility of high compression ratio operation,
Realize the protection for compressor.
Fig. 4 shows the structural representation of computer equipment according to an embodiment of the invention
As shown in figure 4, computer equipment 40 includes memory 42, processor 44 and is stored on memory 42 and can locate
The computer program run on reason device 44, processor 44 perform the compressor protection side of any of the above-described when performing computer program
Method.
In this embodiment, the computer program for performing the compressor protection method of any of the above-described is stored in memory 42
On, when processor 44 performs computer program, the compressor protection method of any of the above-described can be achieved, therefore with any of the above-described
Whole beneficial effects of compressor protection method, will not be repeated here in embodiment.
Example IV：
Fig. 5 shows the schematic flow sheet of compressor protection method according to still a further embodiment.
As shown in figure 5, step S502, after air-conditioning runs the first preset time to heat state, the of compressor is determined
One compression ratio；
Step S504, if the first compression ratio is not less than predetermined threshold value, improve the heat-energy transducer of the second heat-exchanger rig in air-conditioning
Power；
Step S506, after running for the second time in air-conditioning with the exchange capability of heat after improving, determine the second compression of compressor
Than；
Step S508, if the second compression ratio is not less than predetermined threshold value, turn on by-passing valve；
Step S510, after the ON time of by-passing valve reached for the 3rd time, determine the 3rd compression ratio and the row of compressor
Temperature degree；
Step S512, when the 3rd compression ratio is not less than predetermined threshold value and delivery temperature is less than preset temperature, control compression
Machine performs stoppage protection.
In this embodiment, when the 3rd compression ratio is more than predetermined threshold value and delivery temperature is less than default delivery temperature, say
Publicly price-reduction low exhaust temperature has not reached the effect for reducing compressor pressure ratios, and now, compressor pressure ratios exceed predetermined threshold value,
Compressor is out of service, realizes the protection for compressor.
Embodiment five：
Fig. 6 shows the schematic flow sheet of compressor protection method according to still another embodiment of the invention.
As shown in fig. 6, step S602, after air-conditioning runs the first preset time to heat state, the of compressor is determined
One compression ratio；
Step S604, if the first compression ratio is not less than predetermined threshold value, improve the heat-energy transducer of the second heat-exchanger rig in air-conditioning
Power；
Step S606, after running for the second time in air-conditioning with the exchange capability of heat after improving, determine the second compression of compressor
Than；
Step S608, if the second compression ratio is not less than predetermined threshold value, turn on by-passing valve；
Step S610, after the ON time of by-passing valve reached for the 3rd time, determine the 3rd compression ratio and the row of compressor
Temperature degree；
Step S612, when the 3rd compression ratio is not less than predetermined threshold value and delivery temperature is not less than default delivery temperature, control
Solenoid valve conduction processed, Liquid injection cooling is carried out to compressor；
Step S614, after Liquid injection cooling is carried out to compressor and is terminated, determine the 4th compression ratio of compressor；
Step S616, when the 4th compression ratio is not less than predetermined threshold value, control compressor performs stoppage protection.
In this embodiment, after terminating to compressor liquid-spraying cooling, the 4th compression ratio of compressor is determined, if compressor
The 4th compression ratio be still not less than predetermined threshold value, then explanation carries out Liquid injection cooling to compressor can not also reduce the pressure of compressor
Contracting ratio, now compressor is out of service, so as to realize the shield for compressor.
Embodiment six：
Fig. 7 shows the logic control chart of compressor protection method according to still another embodiment of the invention.
With reference to Fig. 1, Fig. 2 and Fig. 7, when air-conditioning heating operation at low ambient temperatures, after operation of air conditioner is stable, pass through row
Air pressure force snesor detects the exhaust pressure value P of compressorH, back pressure value P is detected by back pressure sensorL, pass through PH
Value and PLValue, the first compression ratio of compressor is determined, wherein, compression ratio is by formula P=(PH+P0)/(PL+P0) be calculated, its
In, P0For compressor pressure offset, P0It is relevant with the compression chamber size of compressor, the P of the compressor of different model0Not phase
Together.
It should be noted that predetermined threshold value and default delivery temperature are in the range of it can realize compressor stable operation
Set, when the compression ratio of compressor exceedes the delivery temperature of predetermined threshold value or exhaust outlet more than default delivery temperature,
Lubricating oil and refrigerant may decompose carbonization, influence the stable operation of compressor system and system；In this embodiment, threshold is preset
Value is set as 8, and default delivery temperature is set as Tspr.
When the first compression ratio of compressor is less than predetermined threshold value, i.e. P<When 8, unit normal operation is controlled, without dynamic
Make, work as P>When 8, by reducing set water temperature, the leaving water temperature of water-side heat is reduced, improves the heat-energy transducer of water-side heat
Power, wherein leaving water temperature are measured by leaving water temperature sensors；A period of time is run with the exchange capability of heat after improving in air-conditioning
Afterwards, P is passed throughHValue and PLValue determines the second compression ratio of compressor, works as P<When 8, unit normal operation is controlled, without acting, when
P>When 8, by-passing valve is turned on, the part high temperature and high pressure gas from exhaust outlet of compressor discharge is flowed back to compression by by-passing valve
The gas returning port of machine, therefore the gas flow of First Heat Exchanger high temperature gases at high pressure is reduced, condensing pressure is reduced, so as to reduce
Pressure at expulsion, reduces compression ratio；After by-passing valve turns on the 3rd preset time, pass through PHValue and PLValue determines compressor
3rd compression ratio, works as P<When 8, unit normal operation is controlled, without action, works as P>8 and delivery temperature not less than default exhaust
Temperature (i.e. Tp>When Tspr), solenoid valve conduction is controlled, Liquid injection cooling is carried out to compressor, reduces delivery temperature to reduce exhaust
Pressure, so as to reduce compression ratio, P>8 and delivery temperature be not less than default delivery temperature (i.e. Tp<When Tspr), compressor, which performs, to stop
Machine is protected；After terminating to compressor liquid-spraying cooling, pass through PHValue and PLValue determines the 4th compression ratio of compressor；Work as P<When 8,
Unit normal operation is controlled, without action, in P>When 8, control compressor performs stoppage protection.
Technical scheme is described in detail above in association with accompanying drawing, the present invention proposes a kind of air-conditioning, compressor is protected
Maintaining method, computer equipment and computer-readable recording medium, by technical scheme, realize and pressed by controlling
The compression ratio of contracting machine is protected to compressor, reduces compressor because compression ratio is excessive, excessive discharge temperature and shut down
Possibility, reduce machine stop times, be advantageous to the stable output of air-conditioner set.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean to combine at least one reality that specific features, structure, material or the feature that the embodiment or example describe are contained in the present invention
Apply in example or example.In this manual, identical embodiment or reality are not necessarily referring to the schematic representation of above-mentioned term
Example.Moreover, description specific features, structure, material or feature can in any one or more embodiments or example with
Suitable mode combines.
The preferred embodiments of the present invention are these are only, are not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (12)
1. a kind of air-conditioning, including：Compressor, the First Heat Exchanger being connected by the first pipeline with the exhaust outlet of the compressor,
The second heat exchanger for being connected by the second pipeline with the gas returning port of the compressor and located at the First Heat Exchanger with it is described
First throttle device between second heat exchanger, it is characterised in that also include：
3rd pipeline, one end of the 3rd pipeline connect the air inlet, and the other end of the 3rd pipeline is connected to described
Second pipeline；
By-passing valve, on the 3rd pipeline, when the compression ratio of the compressor is not less than predetermined threshold value, the by-passing valve
The 3rd pipeline is turned on,
Wherein, the exhaust outlet is provided with back pressure transducer, and the gas returning port is provided with back pressure sensor, the compression ratio
The back pressure value of the exhaust pressure value determined by the back pressure transducer and back pressure sensor measure is true
It is fixed.
2. air-conditioning according to claim 1, it is characterised in that also include：
Gas-liquid separator, on second pipeline, the other end of the 3rd pipeline be connected to the gas-liquid separator and
Between second heat exchanger.
3. air-conditioning according to claim 1, it is characterised in that the exhaust outlet is provided with exhaust gas temperature sensor, the sky
Tune also includes：
4th pipeline, one end of the 4th pipeline are connected with the compressor, and the other end of the 4th pipeline is connected to institute
State between First Heat Exchanger and the first throttle device；
Magnetic valve, on the 4th pipeline, in the delivery temperature that the exhaust gas temperature sensor detects not less than default
When delivery temperature and by-passing valve conducting three pipeline, the 4th pipeline described in the solenoid valve conduction；
Second throttling device, it is series at the magnetic valve on the 4th pipeline.
4. air-conditioning according to claim 3, it is characterised in that
When the First Heat Exchanger is water cooling heat exchanger, it is not less than the predetermined threshold value in the compression ratio of the compressor
When, the leaving water temperature of the water cooling heat exchanger is reduced, water inlet is set respectively in the water inlet and delivery port of the water cooling heat exchanger
Temperature sensor and leaving water temperature sensors, the leaving water temperature are determined by the leaving water temperature sensors.
5. according to the air-conditioning described in claim 3, it is characterised in that
When the First Heat Exchanger is air cooling heat exchanger, the air cooling heat exchanger includes fan, in the pressure of the compressor
When contracting is than being not less than the predetermined threshold value, the operation power of the fan is improved.
A kind of 6. compressor protection method, for the air-conditioning any one of claim 1 to 5, it is characterised in that including：
After air-conditioning is to heat state the first preset time of operation, the first compression ratio of compressor is determined；
If first compression ratio is not less than predetermined threshold value, the exchange capability of heat of First Heat Exchanger in the air-conditioning is improved；
After running for the second time in the air-conditioning with the exchange capability of heat after improving, the second compression ratio of the compressor is determined；
If second compression ratio is not less than the predetermined threshold value, by-passing valve is turned on；
After the ON time of the by-passing valve reached for the 3rd time, the 3rd compression ratio and exhaust temperature of the compressor are determined
Degree；
When the 3rd compression ratio is not less than the predetermined threshold value and the delivery temperature is not less than default delivery temperature, control
Solenoid valve conduction, Liquid injection cooling is carried out to the compressor.
7. compressor protection method according to claim 6, it is characterised in that it is described in air-conditioning to heat state operation the
After one preset time, determine that the first compression ratio of compressor specifically includes：
After the air-conditioning heating runs the first preset time, the first exhaust pressure value and the first return-air of the compressor are determined
Pressure value；
According to the first exhaust pressure value and the first back pressure value, first compression of the compressor is determined
Than；
It is described the second time was run with the exchange capability of heat after improving in the air-conditioning after, determine the second compression ratio of the compressor
Specifically include：
After running for the second time in the air-conditioning with the exchange capability of heat after improving, the second exhaust pressure value of the compressor is determined
With the second back pressure value；
According to the second exhaust pressure value and the second back pressure value, second compression of the compressor is determined
Than；
After the ON time in the by-passing valve reached for the 3rd time, the 3rd compression ratio and the exhaust of the compressor are determined
Temperature specifically includes：
After the ON time of the by-passing valve reached for the 3rd time, the 3rd exhaust pressure value and the 3rd of the compressor is determined
Back pressure value；
According to the 3rd exhaust pressure value and the 3rd back pressure value, the 3rd compression of the compressor is determined
Than.
8. the compressor protection method according to claim 6 or 7, it is characterised in that if first compression ratio is not
Less than predetermined threshold value, then the exchange capability of heat of First Heat Exchanger in the air-conditioning is improved, is specifically included：
If the First Heat Exchanger is water cooling heat exchanger, when first compression ratio is not less than the predetermined threshold value, control
The water cooling heat exchanger reduces leaving water temperature；
If the First Heat Exchanger is air cooling heat exchanger, when first compression ratio is not less than the predetermined threshold value, improve
The operation power of the fan of the air cooling heat exchanger.
9. the compressor protection method according to claim 6 or 7, it is characterised in that also include：
When the 3rd compression ratio is not less than the predetermined threshold value and the delivery temperature is less than the preset temperature, institute is controlled
State compressor and perform stoppage protection.
10. the compressor protection method according to claim 6 or 7, it is characterised in that also include：
After terminating to compressor liquid-spraying cooling, the 4th compression ratio of the compressor is determined；
When the 4th compression ratio is not less than the predetermined threshold value, the compressor is controlled to perform stoppage protection.
11. a kind of computer equipment, including memory, processor and it is stored on the memory and can be on the processor
The computer program of operation, it is characterised in that perform such as claim 6 to 10 described in the computing device during computer program
Any one of compressor protection method.
12. a kind of computer-readable recording medium, is stored thereon with computer program, it is characterised in that the computer program
The compressor protection method as any one of claim 6 to 10 is realized when being executed by processor.
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| CN112432340A (en) * | 2020-11-26 | 2021-03-02 | 珠海格力电器股份有限公司 | Control method and control device of air conditioner, processor and air conditioning system |
| CN112728821A (en) * | 2019-10-14 | 2021-04-30 | 广东芬尼克兹节能设备有限公司 | Compressor ultralow-temperature safe operation control method, device, equipment and storage medium |
| CN114216255A (en) * | 2021-12-02 | 2022-03-22 | 青岛海尔空调器有限总公司 | Control method and device for air conditioner pressure relief and air conditioner |
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