CN107906813A - The control method and air conditioner of air conditioner - Google Patents
The control method and air conditioner of air conditioner Download PDFInfo
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- CN107906813A CN107906813A CN201711054174.6A CN201711054174A CN107906813A CN 107906813 A CN107906813 A CN 107906813A CN 201711054174 A CN201711054174 A CN 201711054174A CN 107906813 A CN107906813 A CN 107906813A
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- Prior art keywords
- exhaust end
- air conditioner
- superheat
- degree
- compressor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/027—Compressor control by controlling pressure
- F25B2600/0271—Compressor control by controlling pressure the discharge pressure
-
- 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
-
- 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
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
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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 present invention provides the control method and air conditioner of air conditioner, after the refrigeration mode of air conditioner is opened, detects the exhaust end pressure and the exhaust end degree of superheat of the compressor of air conditioner in real time；When the numerical value of the exhaust end degree of superheat and exhaust end pressure meets preset condition, the throttling arrangement of air conditioner is closed, to improve the exhaust end degree of superheat of compressor.When testing result be shown in the exhaust end degree of superheat and be vented end pressure numerical value be satisfied by preset condition when pressure limit and the degree of superheat scope when, the throttling arrangement of air conditioner is closed in control, so that refrigerant can not temporarily circulate inside throttling arrangement, and compressor normal operation can take the low pressure refrigerant between throttling arrangement and compressor away, to improve the temperature value of the exhaust end of compressor, and then the exhaust end degree of superheat of compressor can be improved, and then ensure that the refrigerant in evaporator can be with evaporating completely, effectively prevent the generation of compressor liquid hit phenomenon, ensure the service life of compressor.
Description
Technical field
The present invention relates to art of refrigeration units, more specifically, is related to the control method and air conditioner of a kind of air conditioner.
Background technology
The outdoor unit of air-conditioning runs Smaller load refrigeration, the at this time exhaust of compressor under the relatively low environment of outdoor environment temperature
The degree of superheat at end is difficult to be enhanced, and is more difficult to completely especially for the degree of superheat of its exhaust end in the longer air-conditioning of the pipe arrangement of air-conditioning
Foot requires.And if the degree of superheat of the exhaust end of compressor is too low for a long time, air-conditioning can be influenced reliability service.
Therefore, the control method and air conditioner for designing a kind of air conditioner for the degree of superheat that can improve air conditioner become urgently
Problem to be solved.
The content of the invention
It is contemplated that at least solve one of technical problem existing in the prior art.
For this reason, one aspect of the present invention provides a kind of control method of air conditioner.
One aspect of the present invention provides a kind of air conditioner.
To realize above-mentioned aspect, a kind of control method of air conditioner is provided according to an embodiment of the invention, for air-conditioning
Device, the control method of air conditioner include：After the refrigeration mode of air conditioner is opened, the exhaust of the compressor of air conditioner is detected in real time
End pressure and the exhaust end degree of superheat；When the numerical value of the exhaust end degree of superheat and exhaust end pressure meets preset condition, air-conditioning is closed
The throttling arrangement of device, to improve the exhaust end degree of superheat of compressor.
The control method of air conditioner provided by the invention, after the refrigeration mode of air conditioner is opened, the compression to air conditioner
The pressure value and degree of superheat numerical value of the exhaust end of machine are detected in real time, it is contemplated that, in order to ensure that the result of detection can
Lean on, which can start again after air conditioner has run preset duration, when testing result is shown in the exhaust end degree of superheat
And when pressure limit and degree of superheat scope of the numerical value of exhaust end pressure when being satisfied by preset condition, control the section of air conditioner
Stream device is closed so that refrigerant can not temporarily circulate inside throttling arrangement, and compressor normal operation can fill throttling
The low pressure refrigerant put between compressor is taken away, to improve the temperature value of the exhaust end of compressor, and then can improve compressor
The exhaust end degree of superheat, and then ensure evaporator in refrigerant can be with evaporating completely so that the refrigerant entered in compressor can
To be entirely gaseous coolant, the generation of compressor liquid hit phenomenon is effectively prevented, ensures the service life of compressor.
In addition, the control method for the air conditioner that above-described embodiment provides also has following supplementary technology spy according to the present invention
Sign：
In any of the above-described technical solution, it is preferable that preset condition is specially：The exhaust end degree of superheat is less than the first present count
It is worth and exhaust end pressure is less than the second default value.
In the technical scheme, the preset condition for the exhaust end degree of superheat deficiency for judging compressor is set as exhaust end mistake
Temperature is less than the first default value, while in the case of meeting that exhaust end pressure is less than the second default value, could assert
Exhaust end degree of superheat deficiency at this time, due to the influence that the numerical value of the exhaust end degree of superheat is under pressure, overheats in exhaust end
When degree and exhaust end pressure are satisfied by preset condition, the situation of the exhaust end degree of superheat at this time just can determine that.
In any of the above-described technical solution, it is preferable that further included after the step of closing the throttling arrangement of air conditioner:Judge
Whether the exhaust end degree of superheat is more than the 3rd default value or whether exhaust end pressure is more than the 4th default value；When exhaust end overheats
When degree is more than four default values more than the 3rd default value or exhaust end pressure, throttling arrangement is opened.
In the technical scheme, further included after the step of closing the throttling arrangement of air conditioner:To the exhaust end degree of superheat and
Exhaust end pressure continues to detect, and the exhaust end degree of superheat or exhaust end pressure are judged, when the exhaust end degree of superheat
When being more than four default values more than the 3rd default value or exhaust end pressure, as long as it is default to be more than the 3rd in the exhaust end degree of superheat
When numerical value and exhaust end pressure in both the 4th default values more than either condition is met, and throttling arrangement is opened again
Open, to ensure the refrigerant energy normal operation inside air conditioner.
When the exhaust end degree of superheat is more than three default values, illustrate that the exhaust end degree of superheat at this time is set to be raised to
The exhaust end degree of superheat, the refrigerant evaporating completely in system is can guarantee that in the overheat, if the constantly improve degree of superheat again at this time,
It is excessive it will cause the degree of superheat, cause to reduce coefficient of refrigerating performance, and cause excessive discharge temperature and influence the effect of lubricating oil.Together
When be vented end pressure be more than four default values when, excessive pressure can impact the normal use in air conditioner, because
This needs to open throttling arrangement in time.
In any of the above-described technical solution, it is preferable that detect concretely comprising the following steps for the exhaust end degree of superheat of air conditioner：Detection
The exhaust end temperature of air conditioner；Numerical value conversion by exhaust end pressure is saturation temperature, and the exhaust end degree of superheat is exhaust end temperature
And the difference of saturation temperature.
In the technical scheme, concretely comprised the following steps what the exhaust end degree of superheat to air conditioner was detected：Detect first
The exhaust end temperature of air conditioner and exhaust end pressure, are saturation temperature by the numerical value conversion for being vented end pressure, the exhaust end degree of superheat
The difference for being calculated as exhaust end temperature and saturation temperature, therefore be that end temperature is exhausted to the exhaust end of compressor when detecting
With the detection of exhaust end pressure, the exhaust end degree of superheat can be obtained.
In any of the above-described technical solution, it is preferable that exhaust end pressure passes through the pressure sensor that is connected with compressor
Measure；And/or exhaust end temperature is measured by the temperature sensor being connected with compressor.
In the technical scheme, end temperature is exhausted in the exhaust end to compressor and is vented being detected for end pressure
When, exhaust end pressure measured by the pressure sensor being connected with compressor, exhaust end temperature by with compressor phase
The temperature sensor of connection measures, and can be realized to exhaust end temperature and exhaust by pressure sensor and temperature sensor
End pressure measures, and then obtains the exhaust end degree of superheat, to ensure that the exhaust end degree of superheat is detected and controlled.
A kind of air conditioner is provided according to a second aspect of the present invention, and air conditioner includes：First detection device, with air conditioner
Compressor is connected, and first detection unit is used for after the refrigeration mode of air conditioner is opened, and detects the exhaust end of air conditioner in real time
Pressure；Second detection device, is connected with the compressor of air conditioner, and first detection unit is used to open in the refrigeration mode of air conditioner
Qi Hou, detects the exhaust end degree of superheat of air conditioner in real time；First control device, for controlling in the exhaust end degree of superheat and exhaust end
When the numerical value of pressure meets preset condition, the throttling arrangement of air conditioner is closed, the compressor of air conditioner is taken out low-pressure side refrigerant
Walk to improve the degree of superheat of air conditioner.
Air conditioner provided by the invention includes the first detection device, second detection device and first control device, the first inspection
Device to be surveyed with the exhaust end of the compressor of air conditioner to be connected, second detection device is connected with the compressor of air conditioner, and first
Detection device examines the pressure value of the exhaust end of the compressor of air conditioner after the refrigeration mode of air conditioner is opened in real time
Survey, second detection device after the refrigeration mode of air conditioner is opened, to the exhaust end degree of superheat numerical value of the compressor of air conditioner into
Row detection in real time, it is contemplated that, in order to ensure the reliable results of detection, which can run preset duration in air conditioner
Start again afterwards, the pressure when the numerical value that testing result is shown in the exhaust end degree of superheat and is vented end pressure has been satisfied by preset condition
When power scope and degree of superheat scope, the throttling arrangement of air conditioner is closed in first control device control so that refrigerant is temporary transient
It can not circulate inside throttling arrangement, and compressor normal operation can take out the low pressure refrigerant between throttling arrangement and compressor
Walk, to improve the temperature value of the exhaust end of compressor, and then the exhaust end degree of superheat of compressor can be improved, and then ensure evaporation
Refrigerant in device can be with evaporating completely so that the refrigerant entered in compressor can be entirely gaseous coolant, effectively prevent
There is the generation of compressor liquid hit phenomenon, ensure the service life of compressor.
In any of the above-described technical solution, it is preferable that first control device is specifically used for judging that the exhaust end degree of superheat is less than
First default value and exhaust end pressure be less than the second default value.
In the technical scheme, first control device is specifically used for judge the pre- of the exhaust end degree of superheat deficiency of compressor
If condition is set as that the exhaust end degree of superheat is less than the first default value, while meeting that exhaust end pressure is less than the second present count
In the case of value, exhaust end degree of superheat deficiency at this time, the shadow being under pressure due to the numerical value of the exhaust end degree of superheat could be assert
Ring, therefore when the exhaust end degree of superheat and exhaust end pressure are satisfied by preset condition, just can determine that the exhaust end degree of superheat at this time
Situation.
In any of the above-described technical solution, it is preferable that air conditioner further includes:Second control device, for judging exhaust end
Whether the degree of superheat is more than the 3rd default value or whether exhaust end pressure is more than the 4th default value；When the exhaust end degree of superheat is more than
When 3rd default value or exhaust end pressure are more than four default values, throttling arrangement is opened.
In the technical scheme, air conditioner further includes second control device, to the exhaust end degree of superheat or exhaust end pressure into
Row judges, when the exhaust end degree of superheat is more than the 3rd default value or exhaust end pressure is more than four default values, as long as arranging
When the gas end degree of superheat is more than the 3rd default value and exhaust end pressure more than either condition is met in both the 4th default values, and
Again throttling arrangement is opened, to ensure the refrigerant energy normal operation inside air conditioner.
When the exhaust end degree of superheat is more than three default values, illustrate that the exhaust end degree of superheat at this time is set to be raised to
The exhaust end degree of superheat, the refrigerant evaporating completely in system is can guarantee that in the overheat, if the constantly improve degree of superheat again at this time,
It is excessive it will cause the degree of superheat, cause to reduce coefficient of refrigerating performance, and cause excessive discharge temperature and influence the effect of lubricating oil.Together
When be vented end pressure be more than four default values when, excessive pressure can impact the normal use in air conditioner, because
This needs to open throttling arrangement in time.
In any of the above-described technical solution, it is preferable that second control device is specifically used for the exhaust end temperature of detection air conditioner
Degree；Numerical value conversion by the exhaust end pressure that the first detection device detects is saturation temperature, and the exhaust end degree of superheat is exhaust end
The difference of temperature and saturation temperature.
In the technical scheme, second control device is specifically used for the exhaust end temperature and exhaust end for detecting air conditioner first
Pressure, the numerical value conversion by exhaust end pressure is saturation temperature, and the exhaust end degree of superheat is calculated as exhaust end temperature and saturation temperature
The difference of degree, therefore be that end temperature is exhausted to the exhaust end of compressor and is vented the detection of end pressure when detecting, it can obtain
To the exhaust end degree of superheat.
In any of the above-described technical solution, it is preferable that the first detection device is pressure sensor；And/or second control dress
Put including temperature sensor.
In the technical scheme, end temperature is exhausted in the exhaust end to compressor and is vented being detected for end pressure
When, exhaust end pressure measured by the pressure sensor being connected with compressor, exhaust end temperature by with compressor phase
The temperature sensor of connection measures, and can be realized to exhaust end temperature and exhaust by pressure sensor and temperature sensor
End pressure measures, and then obtains the exhaust end degree of superheat, to ensure that the exhaust end degree of superheat is detected and controlled.
Additional aspect and advantage according to the present invention will provide in following description section, partly by from following description
In become obvious, or by the present invention practice 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 a flow chart of the control method for the air conditioner that one embodiment of the present of invention provides；
Fig. 2 shows the another flow chart of the control method for the air conditioner that one embodiment of the present of invention provides；
Fig. 3 shows the another flow chart of the control method for the air conditioner that one embodiment of the present of invention provides；
Fig. 4 shows a schematic diagram of the air conditioner that one embodiment of the present of invention provides.
Reference numeral：
Wherein, the correspondence in Fig. 4 between reference numeral and component names is：
10 pressure sensors, 12 temperature sensors, 14 compressors, 16 throttling arrangements, 18 oil eliminators, 20 four-way valves, 22
Outdoor unit heat exchanger, 24 wind turbines, 26 second shut-off valves, 28 first shut-off valves, 30 gas-liquid separators.
Embodiment
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that aforementioned aspect of the present invention, feature and advantage
Mode is applied the present invention is further described in detail.It should be noted that in the case where there is no conflict, 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
By using other different from implementing in a manner of described here, therefore, protection scope of the present invention and from following public tool
The limitation of body embodiment.
Referring to Fig. 1 to Fig. 4 come describe the control method of air conditioner that provides according to one embodiment of present invention and
Air conditioner.
Fig. 1 shows the flow diagram of the control method of air conditioner provided by one embodiment of the present invention；As shown in Figure 1
The control method of air conditioner, the control method of air conditioner include：
S102, after the refrigeration mode of air conditioner is opened, detects exhaust end pressure and the row of the compressor of air conditioner in real time
The gas end degree of superheat；
S104, when the numerical value of the exhaust end degree of superheat and exhaust end pressure meets preset condition, closes the throttling of air conditioner
Device, to improve the exhaust end degree of superheat of compressor.
The control method of air conditioner provided by the invention, after the refrigeration mode of air conditioner is opened, the compression to air conditioner
The pressure value and degree of superheat numerical value of the exhaust end of machine are detected in real time, it is contemplated that, in order to ensure that the result of detection can
Lean on, which can start again after air conditioner has run preset duration, when testing result is shown in the exhaust end degree of superheat
And when pressure limit and degree of superheat scope of the numerical value of exhaust end pressure when being satisfied by preset condition, control the section of air conditioner
Stream device is closed so that refrigerant can not temporarily circulate inside throttling arrangement, and compressor normal operation can fill throttling
The low pressure refrigerant put between compressor is taken away, to improve the temperature value of the exhaust end of compressor, and then can improve compressor
The exhaust end degree of superheat, and then ensure evaporator in refrigerant can be with evaporating completely so that the refrigerant entered in compressor can
To be entirely gaseous coolant, the generation of compressor liquid hit phenomenon is effectively prevented, ensures the service life of compressor.
Fig. 2 shows the flow diagram of the control method of air conditioner provided by one embodiment of the present invention；As shown in Figure 2
The control method of air conditioner, the control method of air conditioner include：
S202, after the refrigeration mode of air conditioner is opened, detects exhaust end pressure and the row of the compressor of air conditioner in real time
The gas end degree of superheat；
S204, when the exhaust end degree of superheat is less than the first default value and exhaust end pressure is less than the second default value, is closed
The throttling arrangement of air conditioner is closed, to improve the exhaust end degree of superheat of compressor.
In this embodiment, the preset condition for the exhaust end degree of superheat deficiency for judging compressor is set as that exhaust end overheats
Degree is less than the first default value, while in the case of meeting that exhaust end pressure is less than the second default value, could assert this
When the exhaust end degree of superheat deficiency, due to the influence that the numerical value of the exhaust end degree of superheat is under pressure, in the exhaust end degree of superheat
When being satisfied by preset condition with exhaust end pressure, the situation of the exhaust end degree of superheat at this time just can determine that.
Fig. 3 shows the flow diagram of the control method of air conditioner provided by one embodiment of the present invention；As shown in Figure 3
The control method of air conditioner, the control method of air conditioner include：
S302, after the refrigeration mode of air conditioner is opened, detects exhaust end pressure and the row of the compressor of air conditioner in real time
The gas end degree of superheat；
S304, when the numerical value of the exhaust end degree of superheat and exhaust end pressure meets preset condition, closes the throttling of air conditioner
Device, to improve the exhaust end degree of superheat of compressor；
S306, judges whether the exhaust end degree of superheat is more than the 3rd default value or whether exhaust end pressure is more than the 4th and presets
Numerical value；
S308, when the exhaust end degree of superheat is more than the 3rd default value or exhaust end pressure is more than four default values, is opened
Open throttling arrangement.
In this embodiment, further included after the step of closing the throttling arrangement of air conditioner:To the exhaust end degree of superheat and row
Gas end pressure continues to detect, and the exhaust end degree of superheat or exhaust end pressure are judged, when the exhaust end degree of superheat is big
When the 3rd default value or exhaust end pressure are more than four default values, as long as being more than the 3rd present count in the exhaust end degree of superheat
When value and exhaust end pressure in both the 4th default values more than either condition is met, and throttling arrangement is opened again,
To ensure the refrigerant energy normal operation inside air conditioner.
When the exhaust end degree of superheat is more than three default values, illustrate that the exhaust end degree of superheat at this time is set to be raised to
The exhaust end degree of superheat, the refrigerant evaporating completely in system is can guarantee that in the overheat, if the constantly improve degree of superheat again at this time,
It is excessive it will cause the degree of superheat, cause to reduce coefficient of refrigerating performance, and cause excessive discharge temperature and influence the effect of lubricating oil.Together
When be vented end pressure be more than four default values when, excessive pressure can impact the normal use in air conditioner, because
This needs to open throttling arrangement in time.
In one embodiment of the invention, it is preferable that detect concretely comprising the following steps for the exhaust end degree of superheat of air conditioner：Inspection
Survey the exhaust end temperature of air conditioner；Numerical value conversion by exhaust end pressure is saturation temperature, and the exhaust end degree of superheat is exhaust end temperature
The difference of degree and saturation temperature.
In this embodiment, concretely comprised the following steps what the exhaust end degree of superheat to air conditioner was detected：Detection is empty first
The exhaust end temperature and exhaust end pressure of device are adjusted, the numerical value conversion by exhaust end pressure is saturation temperature, the exhaust end degree of superheat
Be calculated as the difference of exhaust end temperature and saturation temperature, thus be when detecting the exhaust end of compressor is exhausted end temperature and
The detection of end pressure is vented, the exhaust end degree of superheat can be obtained.
In one embodiment of the invention, it is preferable that exhaust end pressure passes through the pressure sensing that is connected with compressor
Device measures；And/or exhaust end temperature is measured by the temperature sensor being connected with compressor.
In this embodiment, end temperature is exhausted in the exhaust end to compressor and is vented being detected for end pressure
When, exhaust end pressure measured by the pressure sensor being connected with compressor, exhaust end temperature by with compressor phase
The temperature sensor of connection measures, and can be realized to exhaust end temperature and exhaust by pressure sensor and temperature sensor
End pressure measures, and then obtains the exhaust end degree of superheat, to ensure that the exhaust end degree of superheat is detected and controlled.
As shown in figure 4, providing a kind of air conditioner according to a second aspect of the present invention, air conditioner includes：First detection device,
It is connected with the compressor 14 of air conditioner, first detection unit is used for after the refrigeration mode of air conditioner is opened, and detection is empty in real time
Adjust the exhaust end pressure of device；Second detection device, is connected with the compressor 14 of air conditioner, and first detection unit is used in air-conditioning
After the refrigeration mode of device is opened, the exhaust end degree of superheat of air conditioner is detected in real time；First control device, for controlling in exhaust end
When the numerical value of the degree of superheat and exhaust end pressure meets preset condition, the throttling arrangement 16 of air conditioner is closed, makes the compression of air conditioner
Machine 14 is taken low-pressure side refrigerant away to improve the degree of superheat of air conditioner.
Air conditioner provided by the invention includes the first detection device, second detection device and first control device, the first inspection
Device to be surveyed with the exhaust end of the compressor 14 of air conditioner to be connected, second detection device is connected with the compressor 14 of air conditioner,
First detection device carries out the pressure value of the exhaust end of the compressor 14 of air conditioner after the refrigeration mode of air conditioner is opened
Detection in real time, second detection device overheat the exhaust end of the compressor 14 of air conditioner after the refrigeration mode of air conditioner is opened
Number of degrees value is detected in real time, it is contemplated that, in order to ensure the reliable results of detection, which can run in air conditioner
Start again after preset duration, when the numerical value that testing result is shown in the exhaust end degree of superheat and is vented end pressure has been satisfied by default bar
During pressure limit and degree of superheat scope during part, the throttling arrangement 16 of air conditioner is closed in first control device control, is made
Refrigerant can not temporarily circulate inside throttling arrangement 16, and 14 normal operation of compressor can be by throttling arrangement 16 and compressor 14
Between low pressure refrigerant take away, to improve the temperature value of the exhaust end of compressor 14, and then the exhaust of compressor 14 can be improved
The degree of superheat is held, and then ensures that the refrigerant in evaporator can be with evaporating completely so that the refrigerant entered in compressor 14 can be complete
Gaseous coolant is all, effectively prevents the generation of 14 liquid hit phenomenon of compressor, ensures the service life of compressor 14.
In one embodiment of the invention, it is preferable that first control device is specifically used for judging that the exhaust end degree of superheat is small
It is less than the second default value in the first default value and exhaust end pressure.
In this embodiment, first control device is specifically used for judge the pre- of the exhaust end degree of superheat deficiency of compressor 14
If condition is set as that the exhaust end degree of superheat is less than the first default value, while meeting that exhaust end pressure is less than the second present count
In the case of value, exhaust end degree of superheat deficiency at this time, the shadow being under pressure due to the numerical value of the exhaust end degree of superheat could be assert
Ring, therefore when the exhaust end degree of superheat and exhaust end pressure are satisfied by preset condition, just can determine that the exhaust end degree of superheat at this time
Situation.
In one embodiment of the invention, it is preferable that air conditioner further includes:Second control device, for judging to be vented
Whether the end degree of superheat is more than the 3rd default value or whether exhaust end pressure is more than the 4th default value；When the exhaust end degree of superheat is big
When the 3rd default value or exhaust end pressure are more than four default values, throttling arrangement 16 is opened.
In this embodiment, air conditioner further includes second control device, and the exhaust end degree of superheat or exhaust end pressure are carried out
Judge, when the exhaust end degree of superheat is more than the 3rd default value or exhaust end pressure is more than four default values, as long as being vented
When the end degree of superheat is more than the 3rd default value and exhaust end pressure more than either condition is met in both the 4th default values, and again
Newly throttling arrangement 16 is opened, to ensure the refrigerant energy normal operation inside air conditioner.
When the exhaust end degree of superheat is more than three default values, illustrate that the exhaust end degree of superheat at this time is set to be raised to
The exhaust end degree of superheat, the refrigerant evaporating completely in system is can guarantee that in the overheat, if the constantly improve degree of superheat again at this time,
It is excessive it will cause the degree of superheat, cause to reduce coefficient of refrigerating performance, and cause excessive discharge temperature and influence the effect of lubricating oil.Together
When be vented end pressure be more than four default values when, excessive pressure can impact the normal use in air conditioner, because
This needs to open throttling arrangement 16 in time.
In one embodiment of the invention, it is preferable that second control device is specifically used for the exhaust end of detection air conditioner
Temperature；Numerical value conversion by the exhaust end pressure that the first detection device detects is saturation temperature, and the exhaust end degree of superheat is exhaust
Hold the difference of temperature and saturation temperature.
In this embodiment, second control device is specifically used for the exhaust end temperature and exhaust side pressure for detecting air conditioner first
Power, the numerical value conversion by exhaust end pressure is saturation temperature, and the exhaust end degree of superheat is calculated as exhaust end temperature and saturation temperature
Difference, therefore be the detection that end temperature is exhausted to the exhaust end of compressor 14 and is vented end pressure when detecting, can obtain
To the exhaust end degree of superheat.
In one embodiment of the invention, it is preferable that the first detection device is pressure sensor 10；And/or second control
Device processed includes temperature sensor 12.
In this embodiment, end temperature is exhausted in the exhaust end to compressor 14 and is vented being detected for end pressure
When, exhaust end pressure measured by the pressure sensor 10 being connected with compressor 14, exhaust end temperature by with compression
The temperature sensor 12 that machine 14 is connected measures, and can be realized to exhaust by pressure sensor 10 and temperature sensor 12
End temperature and exhaust end pressure measure, and then obtain the exhaust end degree of superheat, to ensure to be detected the exhaust end degree of superheat
And control.
In one embodiment of the invention, it is preferable that air conditioner includes passing sequentially through the pressure being connected refrigerant communicating pipe
Contracting machine 14, oil eliminator 18, four-way valve 20, outdoor unit heat exchanger 22, throttling arrangement 16 and indoor set heat exchanger (do not show in figure
Go out), the both ends of machine heat exchanger are respectively arranged with the first shut-off valve 28 and the second shut-off valve 26 indoors, in outdoor unit heat exchanger 22
Top be additionally provided with wind turbine 24, to improve the heat transfer effect of heat exchanger, between the exhaust end and four-way valve 20 of compressor 14
Temperature sensor 12 and pressure sensor 10 are additionally provided with, by temperature sensor 12 and pressure sensor 10 to 14 row of compressor
The temperature and pressure at gas end is controlled in real time, to ensure that the 14 exhaust end degree of superheat of compressor maintains higher level, and then
Ensureing that the refrigerant in evaporator can be with evaporating completely so that the refrigerant entered in compressor 14 can be entirely gaseous coolant,
The generation of 14 liquid hit phenomenon of compressor is effectively prevented, ensures the service life of compressor 14.
In the description of this specification, term " multiple " then refers to two or more, unless otherwise restricted clearly, art
The orientation or position relationship of the instructions such as language " on ", " under " are based on orientation shown in the drawings or position relationship, are for only for ease of
Description is of the invention to be described with simplified, rather than the device or element of instruction or hint meaning must be with specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention；Term " connection ", " installation ", " fixation " etc. are equal
It should be interpreted broadly, for example, " connection " can be fixedly connected or be detachably connected, or be integrally connected；Can be
It is connected directly, can also be indirectly connected by intermediary.For the ordinary skill in the art, can be according to specific
Situation understands the concrete meaning of above-mentioned term in the present invention.
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 the particular features, structures, materials, or characteristics that the embodiment or example describe are contained in the present invention
Apply in example or example.In the present specification, schematic expression of the above terms is not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more embodiments or example with
Suitable mode combines.
It these are only the preferred embodiment of the present invention, be not intended to limit the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of control method of air conditioner, for air conditioner, it is characterised in that the control method of the air conditioner includes：
After the refrigeration mode of the air conditioner is opened, exhaust end pressure and the exhaust of the compressor of the air conditioner are detected in real time
Hold the degree of superheat；
When the numerical value of the exhaust end degree of superheat and the exhaust end pressure meets preset condition, the section of the air conditioner is closed
Device is flowed, to improve the exhaust end degree of superheat of compressor.
2. the control method of air conditioner according to claim 1, it is characterised in that
The preset condition is specially：The exhaust end degree of superheat is less than the first default value and the exhaust end pressure is less than the
Two default values.
3. the control method of air conditioner according to claim 1, it is characterised in that closing the throttling dress of the air conditioner
Further included after the step of putting:
Judge whether the exhaust end degree of superheat is more than the 3rd default value or whether the exhaust end pressure is more than the 4th and presets
Numerical value；
When the exhaust end degree of superheat is more than the 3rd default value or the exhaust end pressure is more than four default values, open
The throttling arrangement.
4. the control method of air conditioner according to any one of claim 1 to 3, it is characterised in that
Detect concretely comprising the following steps for the exhaust end degree of superheat of the air conditioner：Detect the exhaust end temperature of the air conditioner；
Numerical value conversion by the exhaust end pressure is saturation temperature, and the exhaust end degree of superheat is the exhaust end temperature and institute
State the difference of saturation temperature.
5. the control method of air conditioner according to claim 4, it is characterised in that
The exhaust end pressure is measured by the pressure sensor being connected with the compressor；And/or
The exhaust end temperature is measured by the temperature sensor being connected with the compressor.
6. a kind of air conditioner, it is characterised in that the air conditioner includes：
First detection device, is connected with the compressor of the air conditioner, and the first detection unit is used in the air conditioner
Refrigeration mode open after, detect the exhaust end pressure of the air conditioner in real time；
Second detection device, is connected with the compressor of the air conditioner, and the first detection unit is used in the air conditioner
Refrigeration mode open after, detect the exhaust end degree of superheat of the air conditioner in real time；
First control device, for controlling the numerical value in the exhaust end degree of superheat and the exhaust end pressure to meet preset condition
When, the throttling arrangement of the air conditioner is closed, to improve the degree of superheat of air conditioner.
7. air conditioner according to claim 6, it is characterised in that
The first control device is specifically used for judging that the exhaust end degree of superheat is less than the first default value and the exhaust end
Pressure is less than the second default value.
8. air conditioner according to claim 6, it is characterised in that the air conditioner further includes:
Second control device, for judging whether the exhaust end degree of superheat is more than the 3rd default value or the exhaust end pressure
Whether the 4th default value is more than；When the exhaust end degree of superheat is more than the 3rd default value or the exhaust end pressure is more than the
During four default values, the throttling arrangement is opened.
9. the air conditioner according to any one of claim 6 to 8, it is characterised in that
The second control device is specifically used for the exhaust end temperature for detecting the air conditioner；First detection device is detected
The numerical value conversion of the exhaust end pressure arrived is saturation temperature, the exhaust end degree of superheat for the exhaust end temperature with it is described
The difference of saturation temperature.
10. air conditioner according to claim 9, it is characterised in that
First detection device is pressure sensor；And/or
The second control device includes temperature sensor.
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| CN201711054174.6A CN107906813A (en) | 2017-10-31 | 2017-10-31 | The control method and air conditioner of air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711054174.6A CN107906813A (en) | 2017-10-31 | 2017-10-31 | The control method and air conditioner of air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09159287A (en) * | 1995-12-01 | 1997-06-20 | Mitsubishi Heavy Ind Ltd | Refrigerator |
| CN202392954U (en) * | 2012-01-09 | 2012-08-22 | 珠海格力电器股份有限公司 | Air conditioner |
| CN103851847A (en) * | 2012-12-03 | 2014-06-11 | 美的集团股份有限公司 | System and method for controlling electronic expansion valve of air conditioner, and multi-split air conditioner outdoor unit |
| CN105910229A (en) * | 2016-04-29 | 2016-08-31 | 青岛海尔空调电子有限公司 | Air-conditioning unit throttling control method and air-conditioning unit |
| CN106895557A (en) * | 2017-02-21 | 2017-06-27 | 广东美的暖通设备有限公司 | Air-conditioning system and its expansion valve control method and control device |
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2017
- 2017-10-31 CN CN201711054174.6A patent/CN107906813A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09159287A (en) * | 1995-12-01 | 1997-06-20 | Mitsubishi Heavy Ind Ltd | Refrigerator |
| CN202392954U (en) * | 2012-01-09 | 2012-08-22 | 珠海格力电器股份有限公司 | Air conditioner |
| CN103851847A (en) * | 2012-12-03 | 2014-06-11 | 美的集团股份有限公司 | System and method for controlling electronic expansion valve of air conditioner, and multi-split air conditioner outdoor unit |
| CN105910229A (en) * | 2016-04-29 | 2016-08-31 | 青岛海尔空调电子有限公司 | Air-conditioning unit throttling control method and air-conditioning unit |
| CN106895557A (en) * | 2017-02-21 | 2017-06-27 | 广东美的暖通设备有限公司 | Air-conditioning system and its expansion valve control method and control device |
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Application publication date: 20180413 |