CN107676922A - 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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- CN107676922A CN107676922A CN201711042357.6A CN201711042357A CN107676922A CN 107676922 A CN107676922 A CN 107676922A CN 201711042357 A CN201711042357 A CN 201711042357A CN 107676922 A CN107676922 A CN 107676922A
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- Prior art keywords
- air conditioner
- exhaust end
- superheat
- compressor
- timing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
Abstract
The embodiment provides a kind of control method of air conditioner and air conditioner, the control method of air conditioner includes：After air conditioner unlatching, the exhaust end degree of superheat of the compressor of air conditioner is detected in real time；When the exhaust end degree of superheat is less than the first default exhaust end degree of superheat, start timing；When timing duration is more than the first preset duration, reduce the valve body aperture between the indoor heat exchanger and outdoor heat exchanger of air conditioner, to improve the exhaust end degree of superheat, in the case where the exhaust end degree of superheat is relatively low, a large amount of lubricating oil can be carried in exhaust, and cause the situation for occurring lubricants capacity reduction in compression, therefore need to reduce the valve body aperture between the indoor heat exchanger and outdoor heat exchanger of air conditioner, and compressor normal operation can take the low pressure refrigerant between valve body and compressor away, and then the exhaust end degree of superheat of compressor can be improved, so as to reduce the oil drain quantity of compressor, it ensure that the normal operation 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
Compressor is the heart of steam compressing air conditioner system, and power is provided for refrigerant circulation in system.Compressor category
In high-speed rotary part, lubricating oil is one of key factor for ensureing compressor normal operation.Steam compressing air conditioner system is transported
During row, compressor can take a part of lubricating oil out of during the refrigerant of discharge HTHP, must after longtime running
The reduction of lubricant in compressor amount is so caused, compressor meeting can not normal work because lubricating oil is lacked.Current solution party
Method mainly has two kinds：First, setting oil eliminator in exhaust outlet of compressor, out the lubricating oil separation in exhaust is sent back to compression
Machine；Second, carry out oil return operation afterwards for a period of time in system operation, by the refrigerant of high-speed circulating by the lubricating oil in system
Take back compressor.Current steam compressing air conditioner system ensures the oil mass of compressor using both approaches mostly, but
Compressor petrol starvation still occurs in actual moving process.
The content of the invention
It is contemplated that at least solves one of technical problem present in prior art.
Therefore, 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.
In view of it is above-mentioned, a kind of control method of air conditioner is provided according to an embodiment of the invention, for air conditioner, air-conditioning
The control method of device includes：After air conditioner unlatching, the exhaust end degree of superheat of the compressor of air conditioner is detected in real time；Work as exhaust end
When the degree of superheat is less than the first default exhaust end degree of superheat, start timing；When timing duration is more than the first preset duration, reduce empty
Adjust the valve body aperture between the indoor heat exchanger and outdoor heat exchanger of device.
The control method of air conditioner provided by the invention, after air conditioner unlatching, the compressor of air conditioner is detected in real time
The exhaust end degree of superheat；When the exhaust end degree of superheat to compressor detects, when the exhaust end degree of superheat is less than the first default row
During the degree of superheat of gas end, start timing, calculate the exhaust end degree of superheat be less than the first default exhaust end degree of superheat duration whether
The first preset duration can be reached, be less than the duration of the first default exhaust end degree of superheat more than first in the exhaust end degree of superheat
During preset duration, illustrate now persistently to keep the relatively low state of the exhaust end degree of superheat for a period of time in air conditioner, in exhaust end
In the case that the degree of superheat is relatively low, a large amount of lubricating oil can be carried in exhaust, and cause the situation for occurring lubricants capacity reduction in compression,
Therefore need to reduce the valve body aperture between the indoor heat exchanger and outdoor heat exchanger of air conditioner, and compressor normal operation can be with
Low pressure refrigerant between valve body and compressor is taken away, and then the exhaust end degree of superheat of compressor can be improved, so as to reduce
The oil drain quantity of compressor, it ensure that the normal operation of compressor.
In addition, the control method of the air conditioner provided according to the above embodiment of the present invention also has following supplementary technology special
Sign：
In any of the above-described technical scheme, it is preferable that when timing duration is more than the first preset duration, reduce air conditioner
Valve body aperture between indoor heat exchanger and outdoor heat exchanger concretely comprises the following steps：When timing duration is more than the first preset duration
When, timing is reset and restarts timing；Every after the second preset duration, reduce opening for valve body according to default step number
Degree.
In the technical scheme, the step of the valve body aperture between the indoor heat exchanger and outdoor heat exchanger of air conditioner is reduced
In rapid, the aperture of valve body is controlled step by step in order to can guarantee that, avoids once reducing excessive by aperture and causing moment to arrange
The gas end degree of superheat improves too fast, then the degree of superheat can be caused too high, cause to reduce coefficient of refrigerating performance, and cause excessive discharge temperature and
Influence the lubrication of lubricating oil；Therefore the step of reducing aperture is to determine timing duration more than after the first preset duration,
Timing is reset and restarts timing, and every after the second preset duration, reduces opening for valve body according to default step number
Degree, it is preferable that can be every after 2 minutes, valve body aperture reduces 8 steps, and (now the maximum opening of corresponding valve body is 480 steps
Valve body), or valve body aperture reduces the 1/60 of valve body maximum opening, and after next 2 minutes, valve body aperture subtracts again
Small 8 step.
In any of the above-described technical scheme, it is preferable that when timing duration is more than the first preset duration, reduce air conditioner
Indoor heat exchanger and outdoor heat exchanger between valve body aperture the step of after also include：When the exhaust end degree of superheat is pre- more than second
If during the exhaust end degree of superheat, start timing；Judge whether timing duration is more than the 3rd preset duration；When timing duration is more than the 3rd
During preset duration, stop reducing the aperture of valve body.
In the technical scheme, when timing duration is more than the first preset duration, reduce the indoor heat exchanger of air conditioner
Also include after the step of valve body aperture between outdoor heat exchanger：It is more than the second default exhaust end overheat in the exhaust end degree of superheat
When spending, start timing；Now illustrate that the exhaust end degree of superheat should reach the degree of superheat of optimal guarantee oil lubrication, to the row
The retention time of the gas end degree of superheat carries out timing, judges whether timing duration is more than the 3rd preset duration；When timing duration is more than
During three preset durations, stop reducing the aperture of valve body, when timing duration is more than three preset durations, illustrate the whole 3rd
In preset duration, the exhaust end degree of superheat can be maintained at a suitable level, just assert the now exhaust end degree of superheat in system
It need not be enhanced, it is therefore desirable to stop reducing the aperture of valve body, ensure that the exhaust end degree of superheat is maintained in data at this moment,
And timing is reset, when return judges whether the exhaust end degree of superheat is less than the first default exhaust end degree of superheat, starts timing
Step, the detection to the exhaust end degree of superheat is kept, when timing duration is not more than three preset durations, then or with every pass through the
After two preset durations, according to default step number reduce valve body aperture the step of valve body is controlled.
In any of the above-described technical scheme, it is preferable that the tool of the exhaust end degree of superheat of the compressor of detection air conditioner in real time
Body step is：Detect the real time temperature and exhaust end pressure of compressor；The numerical value for being vented end pressure is converted into saturation temperature, arranged
The gas end degree of superheat is the difference of real time temperature and saturation temperature.
In the technical scheme, the exhaust end temperature and exhaust end pressure of air conditioner are detected first, will be vented end pressure
Numerical value is converted to saturation temperature, the difference for being calculated as exhaust end temperature and saturation temperature of the exhaust end degree of superheat, therefore in detection
For end temperature is exhausted to the exhaust end of compressor and is vented the detection of end pressure, the exhaust end degree of superheat can be obtained.
In any of the above-described technical scheme, it is preferable that exhaust end pressure is measured by pressure sensor, pressure sensing
Device is connected with compressor；And/or real time temperature is by setting the exhaust temperature-sensitive bag that bears down on one on the compressor to measure.
In the technical scheme, compressor is being exhausted end temperature and when detecting of end pressure of exhaust, exhaust
End pressure is measured by the pressure sensor being connected with compressor, and exhaust end temperature is by setting pressure on the compressor
Top row gas temperature-sensitive bag measures, and can be realized to exhaust end temperature and exhaust by pressure sensor and the exhaust temperature-sensitive bag that bears down on one
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 the control method applied to any of the above-described air conditioner is carried out
Control, air conditioner include：Detection means, it is connected with the compressor of air conditioner, detection means is used for after air conditioner unlatching, real
When detect air conditioner compressor the exhaust end degree of superheat；First time set, for when the exhaust end degree of superheat be less than it is first pre-
If during the exhaust end degree of superheat, start timing；First control device, for when timing duration is more than the first preset duration, reducing
Valve body aperture between the indoor heat exchanger and outdoor heat exchanger of air conditioner.
Air conditioner provided by the invention includes detection means, the first time set and first control device, detection means, with
The compressor of air conditioner is connected, and after air conditioner unlatching, detection means detects the exhaust end mistake of the compressor of air conditioner in real time
Temperature；When the exhaust end degree of superheat to compressor detects, when the exhaust end degree of superheat is less than the first default exhaust end overheat
When spending, the first time set starts timing, calculates the duration that the exhaust end degree of superheat is less than the first default exhaust end degree of superheat
Whether the first preset duration can be reached, the duration that the first default exhaust end degree of superheat is less than in the exhaust end degree of superheat has exceeded
During the first preset duration, illustrate now persistently to keep the relatively low state of the exhaust end degree of superheat for a period of time in air conditioner, arranging
In the case that the gas end degree of superheat is relatively low, a large amount of lubricating oil can be carried in exhaust, and cause occur lubricants capacity reduction in compression
Situation, it is therefore desirable to first control device reduces the valve body aperture between the indoor heat exchanger and outdoor heat exchanger of air conditioner, and
Compressor normal operation can take the low pressure refrigerant between valve body and compressor away, and then can improve the exhaust end of compressor
The degree of superheat, so as to reduce the oil drain quantity of compressor, it ensure that the normal operation of compressor.
In any of the above-described technical scheme, it is preferable that first control device is specifically used for when timing duration is pre- more than first
If during duration, timing is reset and restarts timing；Every after the second preset duration, reduce valve body according to default step number
Aperture.
In the technical scheme, first control device is between the indoor heat exchanger and outdoor heat exchanger of air conditioner is reduced
In the step of valve body aperture, the aperture of valve body is controlled step by step in order to can guarantee that, avoids once reducing aperture excessive
And it is too fast to cause the moment exhaust end degree of superheat to improve, then the degree of superheat can be caused too high, cause to reduce coefficient of refrigerating performance, and the row of causing
Temperature is spent high and influences the lubrication of lubricating oil；Therefore first control device reduces the step of aperture to determine timing
After duration is more than the first preset duration, timing is reset and restarts timing, and is pressed every after the second preset duration
Reduce the aperture of valve body according to default step number, it is preferable that can be every after 2 minutes, valve body aperture reduces 8 steps and (now corresponded to
Valve body maximum opening be 480 steps valve body), or valve body aperture reduces the 1/60 of valve body maximum opening, and under process
One after 2 minutes, valve body aperture reduces 8 steps again.
In any of the above-described technical scheme, it is preferable that air conditioner also includes：Second time set, for when exhaust end mistake
When temperature is more than the second default exhaust end degree of superheat, start timing；Second control device, when timing duration, which is more than the 3rd, to be preset
When long, stop reducing the aperture of valve body.
In the technical scheme, air conditioner also includes the second time set and second control device：Second time set exists
When the exhaust end degree of superheat is more than the second default exhaust end degree of superheat, start timing；Now illustrate that the exhaust end degree of superheat should reach
The optimal degree of superheat for ensureing oil lubrication, timing is carried out to the retention time of the exhaust end degree of superheat, judges timing duration
Whether the 3rd preset duration is more than；When timing duration is more than three preset durations, second control device stops reducing valve body
Aperture, when timing duration is more than three preset durations, illustrate in whole 3rd preset duration, the exhaust end degree of superheat can protect
Hold in a suitable level, just assert that now the exhaust end degree of superheat need not be enhanced in system, it is therefore desirable to which stopping subtracts
The aperture of small valve body, ensure that the exhaust end degree of superheat is maintained in data at this moment, and timing is reset, return judges exhaust end
When whether the degree of superheat is less than the first default exhaust end degree of superheat, the step of starting timing, the detection to the exhaust end degree of superheat is kept,
When timing duration is not more than three preset durations, then or with every after the second preset duration, reduce according to default step number
The step of aperture of valve body, is controlled to valve body.
In any of the above-described technical scheme, it is preferable that detection means is specifically used for real time temperature and the row of detection compressor
Gas end pressure；The numerical value for being vented end pressure is converted into saturation temperature, the exhaust end degree of superheat be real time temperature and saturation temperature it
Difference.
In the technical scheme, detection means detects the exhaust end temperature of air conditioner first when detecting the exhaust end degree of superheat
Degree and exhaust end pressure, are converted to saturation temperature, the exhaust end degree of superheat is calculated as exhaust end temperature by the numerical value for being vented end pressure
The difference of degree and saturation temperature, therefore hold temperature and the inspection of exhaust end pressure in detection for the exhaust end of compressor is exhausted
Survey, the exhaust end degree of superheat can be obtained.
In any of the above-described technical scheme, it is preferable that detection means includes：Pressure sensor, pressure sensor and compression
Machine is connected, and end pressure is vented for detecting；And the exhaust temperature-sensitive bag that bears down on one, the exhaust temperature-sensitive bag that bears down on one set on the compressor, used
In detection real time temperature.
In the technical scheme, detection means includes pressure sensor and the exhaust temperature-sensitive bag that bears down on one, and is carried out to compressor
Exhaust end temperature and when detect of end pressure of exhaust, exhaust end pressure are entered by the pressure sensor being connected with compressor
Row measurement, exhaust end temperature by setting the exhaust temperature-sensitive bag that bears down on one on the compressor to measure, by pressure sensor and
The exhaust temperature-sensitive bag that bears down on one can be realized to be measured to exhaust end temperature and exhaust end pressure, and then obtains the exhaust end degree of superheat,
To ensure that the exhaust end degree of superheat is detected and controlled.
It will be provided according to the additional aspect and advantage of the present invention 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：
Wherein, the corresponding relation in Fig. 4 between reference and component names is：
10 compressors；12 oil eliminators；14 four-way valves；16 indoor heat exchangers；18 valve bodies；20 outdoor heat exchangers；22 low pressure
Tank；24 oil return capillaries；26, which bear down on one, is vented temperature-sensitive bag；28 pressure sensors, 30 detection means.
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
By using other be different from it is described here in a manner of implement, therefore, protection scope of the present invention is not by 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 schematic flow sheet of the control method for the air conditioner that one embodiment of the invention provides；As shown in Figure 1
The control method of air conditioner, the control method of air conditioner include：
S102, after air conditioner unlatching, the exhaust end degree of superheat of the compressor of air conditioner is detected in real time；
S104, when the exhaust end degree of superheat is less than the first default exhaust end degree of superheat, start timing；
S106, when timing duration is more than the first preset duration, reduce the indoor heat exchanger and outdoor heat exchanger of air conditioner
Between valve body aperture.
The control method of air conditioner provided by the invention, after air conditioner unlatching, the compressor of air conditioner is detected in real time
The exhaust end degree of superheat；When the exhaust end degree of superheat to compressor detects, when the exhaust end degree of superheat is less than the first default row
During the degree of superheat of gas end, start timing, calculate the exhaust end degree of superheat be less than the first default exhaust end degree of superheat duration whether
The first preset duration can be reached, be less than the duration of the first default exhaust end degree of superheat more than first in the exhaust end degree of superheat
During preset duration, illustrate now persistently to keep the relatively low state of the exhaust end degree of superheat for a period of time in air conditioner, in exhaust end
In the case that the degree of superheat is relatively low, a large amount of lubricating oil can be carried in exhaust, and cause the situation for occurring lubricants capacity reduction in compression,
Therefore need to reduce the valve body aperture between the indoor heat exchanger and outdoor heat exchanger of air conditioner, and compressor normal operation can be with
Low pressure refrigerant between valve body and compressor is taken away, and then the exhaust end degree of superheat of compressor can be improved, so as to reduce
The oil drain quantity of compressor, it ensure that the normal operation of compressor.
Fig. 2 shows the schematic flow sheet of the control method for the air conditioner that one embodiment of the invention provides；As shown in Figure 2
The control method of air conditioner, the control method of air conditioner include：
S202, after air conditioner unlatching, the exhaust end degree of superheat of the compressor of air conditioner is detected in real time；
S204, when the exhaust end degree of superheat is less than the first default exhaust end degree of superheat, start timing；
S206, when timing duration is more than the first preset duration, timing is reset and restarts timing；
S208, every after the second preset duration, reduce the aperture of valve body according to default step number.
In this embodiment, reduce air conditioner indoor heat exchanger and outdoor heat exchanger between valve body aperture the step of
In, the aperture of valve body is controlled step by step in order to can guarantee that, avoids once reducing excessive by aperture and causing moment to be vented
Hold the degree of superheat to improve too fast, then the degree of superheat can be caused too high, cause to reduce coefficient of refrigerating performance, and cause excessive discharge temperature and shadow
Ring the lubrication of lubricating oil；Therefore the step of reducing aperture is to determine timing duration more than after the first preset duration, will
Timing resets and restarts timing, and every after the second preset duration, reduces the aperture of valve body according to default step number,
Preferably, can be every after 2 minutes, valve body aperture reduces 8 steps, and (now the maximum opening of corresponding valve body is 480 steps
Valve body), or the 1/60 of valve body aperture reduction valve body maximum opening, and after next 2 minutes, valve body aperture reduces again
8 steps.
Fig. 3 shows the schematic flow sheet of the control method for the air conditioner that one embodiment of the invention provides；As shown in Figure 3
The control method of air conditioner, the control method of air conditioner include：
S302, after air conditioner unlatching, the exhaust end degree of superheat of the compressor of air conditioner is detected in real time；
S304, when the exhaust end degree of superheat is less than the first default exhaust end degree of superheat, start timing；
S306, when timing duration is more than the first preset duration, reduce the indoor heat exchanger and outdoor heat exchanger of air conditioner
Between valve body aperture；
S308, when the exhaust end degree of superheat is more than the second default exhaust end degree of superheat, start timing；
S310, judges whether timing duration is more than the 3rd preset duration；
S312, when timing duration is more than three preset durations, stop reducing the aperture of valve body.
In this embodiment, when timing duration is more than the first preset duration, reduce the indoor heat exchanger of air conditioner with
Also include after the step of valve body aperture between outdoor heat exchanger：It is more than the second default exhaust end degree of superheat in the exhaust end degree of superheat
When, start timing；Now illustrate that the exhaust end degree of superheat should reach the degree of superheat of optimal guarantee oil lubrication, to the exhaust
Hold the retention time of the degree of superheat to carry out timing, judge whether timing duration is more than the 3rd preset duration；When timing duration is more than the
During three preset durations, stop reducing the aperture of valve body, when timing duration is more than three preset durations, illustrate pre- the whole 3rd
If in duration, the exhaust end degree of superheat can be maintained at one it is suitable horizontal, just assert that now the exhaust end degree of superheat is not in system
Need be enhanced, it is therefore desirable to stop reducing the aperture of valve body, ensure that the exhaust end degree of superheat is maintained in data at this moment, and
And reset timing, when return judges whether the exhaust end degree of superheat is less than the first default exhaust end degree of superheat, start the step of timing
Suddenly, the detection to the exhaust end degree of superheat is kept, when timing duration is not more than three preset durations, then or with every passes through second
After preset duration, according to default step number reduce valve body aperture the step of valve body is controlled.
In one embodiment provided by the invention, it is preferable that the exhaust end overheat of the compressor of detection air conditioner in real time
Degree concretely comprises the following steps：Detect the real time temperature and exhaust end pressure of compressor；The numerical value for being vented end pressure is converted into saturation
Temperature, the exhaust end degree of superheat are the difference of real time temperature and saturation temperature.
In this embodiment, the exhaust end temperature and exhaust end pressure of air conditioner are detected first, will be vented the number of end pressure
Value is converted to saturation temperature, the difference for being calculated as exhaust end temperature and saturation temperature of the exhaust end degree of superheat, therefore is in detection
End temperature is exhausted to the exhaust end of compressor and is vented the detection of end pressure, the exhaust end degree of superheat can be obtained.
In one embodiment provided by the invention, it is preferable that exhaust end pressure is measured by pressure sensor, is pressed
Force snesor is connected with compressor；And/or real time temperature is by setting the exhaust temperature-sensitive bag that bears down on one on the compressor to be surveyed
Amount.
In this embodiment, compressor is being exhausted end temperature and when detecting of end pressure of exhaust, exhaust end
Pressure is measured by the pressure sensor being connected with compressor, and exhaust end temperature is by setting bearing down on one on the compressor
Exhaust temperature-sensitive bag measures, and can be realized to exhaust end temperature and exhaust end by pressure sensor and the exhaust temperature-sensitive bag that bears down on one
Pressure measures, and then obtains the exhaust end degree of superheat, to ensure that the exhaust end degree of superheat is detected and controlled.
In one embodiment provided by the invention, it is preferable that the first default exhaust end degree of superheat can be arranged into 5
Degree, the first preset duration is arranged to 30min, and the second preset duration is arranged to 2min, and default step number is 8 steps, the 3rd preset duration
5min is arranged to, the second default exhaust end degree of superheat is arranged to 20 degree.
As shown in figure 4, a kind of air conditioner is provided according to a second aspect of the present invention, the control applied to any of the above-described air conditioner
Method processed is controlled, and air conditioner includes：Detection means 30, it is connected with the compressor 10 of air conditioner, detection means 30 is used for
After air conditioner unlatching, the exhaust end degree of superheat of the compressor 10 of air conditioner is detected in real time；First time set, for when exhaust
When holding the degree of superheat less than the first default exhaust end degree of superheat, start timing；First control device, for being more than the when timing duration
During one preset duration, reduce the aperture of valve body 18 between the indoor heat exchanger 16 of air conditioner and outdoor heat exchanger 20.
Air conditioner provided by the invention includes detection means 30, the first time set and first control device, detection means
30, it is connected with the compressor 10 of air conditioner, after air conditioner unlatching, detection means 30 detects the compressor 10 of air conditioner in real time
The exhaust end degree of superheat；When the exhaust end degree of superheat to compressor 10 detects, when the exhaust end degree of superheat is pre- less than first
If during the exhaust end degree of superheat, the first time set starts timing, calculate the exhaust end degree of superheat and be less than the first default exhaust end overheat
Whether the duration of degree can reach the first preset duration, be less than holding for the first default exhaust end degree of superheat in the exhaust end degree of superheat
Continuous duration more than the first preset duration when, illustrate now persistently to keep the relatively low state one of the exhaust end degree of superheat in air conditioner
The section time, in the case where the exhaust end degree of superheat is relatively low, a large amount of lubricating oil can be carried in exhaust, and cause to compress interior lubricate
The situation that oil mass reduces, it is therefore desirable to which first control device reduces between the indoor heat exchanger 16 and outdoor heat exchanger 20 of air conditioner
The aperture of valve body 18, and the normal operation of compressor 10 can take the low pressure refrigerant between valve body 18 and compressor 10 away, and then
The exhaust end degree of superheat of compressor 10 can be improved, so as to reduce the oil drain quantity of compressor 10, ensure that compressor 10 just
Often operation.
In one embodiment provided by the invention, it is preferable that first control device is specifically used for when timing duration is more than
During the first preset duration, timing is reset and restarts timing；Every after the second preset duration, subtract according to default step number
The aperture of small valve body 18.
In this embodiment, first control device is between the indoor heat exchanger 16 and outdoor heat exchanger 20 of air conditioner is reduced
18 aperture of valve body the step of in, the aperture of valve body 18 is controlled step by step in order to can guarantee that, avoids once subtracting aperture
It is small excessive and cause the moment exhaust end degree of superheat improve it is too fast, then the degree of superheat can be caused too high, cause reduce coefficient of refrigerating performance, and
Cause excessive discharge temperature and influence the lubrication of lubricating oil；Therefore first control device reduces the step of aperture to judge
After being more than the first preset duration to timing duration, timing is reset and restarts timing, and when every process second is default
After length, reduce the aperture of valve body 18 according to default step number, it is preferable that can be every after 2 minutes, the aperture of valve body 18 reduces 8
(valve body 18 that now maximum opening of corresponding valve body 18 is 480 steps) is walked, or the aperture of valve body 18 reduces the maximum opening of valve body 18
1/60, and after next 2 minutes, the aperture of valve body 18 reduces 8 steps again.
In one embodiment provided by the invention, it is preferable that air conditioner also includes：Second time set, for as row
When the gas end degree of superheat is more than the second default exhaust end degree of superheat, start timing；Second control device, when timing duration is more than the 3rd
During preset duration, stop reducing the aperture of valve body 18.
In this embodiment, air conditioner also includes the second time set and second control device：Second time set is being arranged
When the gas end degree of superheat is more than the second default exhaust end degree of superheat, start timing；Now illustrate that the exhaust end degree of superheat should reach
The optimal degree of superheat for ensureing oil lubrication, timing is carried out to the retention time of the exhaust end degree of superheat, judges that timing duration is
It is no to be more than the 3rd preset duration；When timing duration is more than three preset durations, second control device stops reducing valve body 18
Aperture, when timing duration is more than three preset durations, illustrate in whole 3rd preset duration, the exhaust end degree of superheat can protect
Hold in a suitable level, just assert that now the exhaust end degree of superheat need not be enhanced in system, it is therefore desirable to which stopping subtracts
The aperture of small valve body 18, ensure that the exhaust end degree of superheat is maintained in data at this moment, and timing is reset, return and judge exhaust
When holding the degree of superheat whether to be less than the first default exhaust end degree of superheat, the step of starting timing, the inspection to the exhaust end degree of superheat is kept
Survey, when timing duration is not more than three preset durations, then or with every after the second preset duration, subtract according to default step number
The step of aperture of small valve body 18, is controlled to valve body 18.
In one embodiment provided by the invention, it is preferable that detection means 30 is specifically used for the reality of detection compressor 10
Shi Wendu and exhaust end pressure；The numerical value for being vented end pressure is converted into saturation temperature, the exhaust end degree of superheat be real time temperature with
The difference of saturation temperature.
In this embodiment, detection means 30 detects the exhaust end temperature of air conditioner first when detecting the exhaust end degree of superheat
Degree and exhaust end pressure, are converted to saturation temperature, the exhaust end degree of superheat is calculated as exhaust end temperature by the numerical value for being vented end pressure
The difference of degree and saturation temperature, therefore hold temperature and exhaust end pressure in detection for the exhaust end of compressor 10 is exhausted
Detection, can obtain the exhaust end degree of superheat.
In one embodiment provided by the invention, it is preferable that detection means 30 includes：Pressure sensor 28, pressure pass
Sensor 28 is connected with compressor 10, and end pressure is vented for detecting；And the exhaust temperature-sensitive bag 26 that bears down on one, bear down on one exhaust temperature-sensitive bag 26
It is arranged on compressor 10, for detecting real time temperature.
In this embodiment, detection means 30 includes pressure sensor 28 and beared down on one to be vented temperature-sensitive bag 26, to compressor
10 are exhausted end temperature and when detect of end pressure of exhaust, and exhaust end pressure passes through the pressure that is connected with compressor 10
Sensor 28 is measured, and exhaust end temperature is measured by the exhaust temperature-sensitive bag 26 that bears down on one being arranged on compressor 10, is led to
Over-pressed force snesor 28 and the exhaust temperature-sensitive bag 26 that bears down on one can realize and exhaust end temperature and exhaust end pressure are measured, and then
The exhaust end degree of superheat is obtained, to ensure that the exhaust end degree of superheat is detected and controlled.
In one embodiment of the invention, air conditioner includes passing sequentially through the compressor 10 being connected refrigerant communicating pipe,
Oil eliminator 12, four-way valve 14, outdoor unit heat exchanger, valve body 18, indoor set heat exchanger, low-pressure tank 22 and oil return capillary 24,
Bear down on one exhaust temperature-sensitive bag 26 and pressure sensor 28, valve body 18 are additionally provided between the exhaust end and four-way valve 14 of compressor 10
Could be arranged to electric expansion valve etc. has the valve body 18 of throttling arrangement, passes through exhaust temperature-sensitive bag 26 and the pressure sensor 28 of bearing down on one
The exhaust end temperature and pressure of compressor 10 is controlled in real time, to ensure that it is higher that the exhaust end degree of superheat of compressor 10 maintains
Level, and then ensure that the refrigerant in evaporator, so as to reduce the oil drain quantity of compressor 10, can ensure that compression with evaporating completely
The normal operation of machine 10 so that the refrigerant entered in compressor 10 can be entirely gaseous coolant, effectively prevent pressure
The generation of the liquid hit phenomenon of contracting machine 10, ensure the service life of compressor 10.
In the description of this specification, term " multiple " then refers to two or more, is limited unless otherwise clear and definite, 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 joined directly together, 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 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 (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 air conditioner unlatching, the exhaust end degree of superheat of the compressor of the air conditioner is detected in real time；
When the exhaust end degree of superheat is less than the first default exhaust end degree of superheat, start timing；
When timing duration is more than the first preset duration, between the indoor heat exchanger and outdoor heat exchanger that reduce the air conditioner
Valve body aperture.
2. the control method of air conditioner according to claim 1, it is characterised in that when timing duration, which is more than first, to be preset
When long, reduce concretely comprising the following steps for the valve body aperture between the indoor heat exchanger and outdoor heat exchanger of the air conditioner：
When timing duration is more than the first preset duration, timing is reset and restarts timing；
Every after the second preset duration, reduce the aperture of the valve body according to default step number.
3. the control method of air conditioner according to claim 1, it is characterised in that preset when timing duration is more than first
During duration, also include after the step of reducing the valve body aperture between the indoor heat exchanger and outdoor heat exchanger of the air conditioner：
When the exhaust end degree of superheat is more than the second default exhaust end degree of superheat, start timing；
Judge whether timing duration is more than the 3rd preset duration；
When timing duration is more than three preset durations, stop reducing the aperture of the valve body.
4. the control method of air conditioner according to any one of claim 1 to 3, it is characterised in that in real time described in detection
The exhaust end degree of superheat of the compressor of air conditioner concretely comprises the following steps：
Detect the real time temperature and exhaust end pressure of the compressor；
The numerical value of the exhaust end pressure is converted into saturation temperature, the exhaust end degree of superheat be the real time temperature with it is described
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 pressure sensor, and the pressure sensor is connected with the compressor；With/
Or
The real time temperature is measured by the exhaust temperature-sensitive bag that bears down on one being arranged on the compressor.
6. a kind of air conditioner, the control method for the air conditioner as any one of claim 1 to 5, it is characterised in that
The air conditioner includes：
Detection means, it is connected with the compressor of the air conditioner, the detection means is used for after air conditioner unlatching, real
When detect the air conditioner compressor the exhaust end degree of superheat；
First time set, for when the exhaust end degree of superheat is less than the first default exhaust end degree of superheat, starting timing；
First control device, for when timing duration is more than the first preset duration, reducing the indoor heat exchanger of the air conditioner
Valve body aperture between outdoor heat exchanger.
7. air conditioner according to claim 6, it is characterised in that
The first control device is specifically used for when timing duration is more than the first preset duration, and timing is reset and restarted
Timing；Every after the second preset duration, reduce the aperture of the valve body according to default step number.
8. air conditioner according to claim 6, it is characterised in that the air conditioner also includes：
Second time set, for when the exhaust end degree of superheat is more than the second default exhaust end degree of superheat, starting timing；
Second control device, when timing duration is more than three preset durations, stop reducing the aperture of the valve body.
9. the air conditioner according to any one of claim 6 to 8, it is characterised in that
The detection means is specifically used for the real time temperature for detecting the compressor and exhaust end pressure；By the exhaust end pressure
Numerical value be converted to saturation temperature, the exhaust end degree of superheat is the difference of the real time temperature and the saturation temperature.
10. air conditioner according to claim 9, it is characterised in that the detection means includes：
Pressure sensor, the pressure sensor are connected with the compressor, for detecting the exhaust end pressure；And
Bear down on one exhaust temperature-sensitive bag, and the exhaust temperature-sensitive bag that bears down on one is arranged on the compressor, for detecting the real time temperature.
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| CN201711042357.6A CN107676922A (en) | 2017-10-31 | 2017-10-31 | The control method and air conditioner of air conditioner |
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| CN201711042357.6A CN107676922A (en) | 2017-10-31 | 2017-10-31 | The control method and air conditioner of air conditioner |
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| CN113834202A (en) * | 2021-09-06 | 2021-12-24 | 美的集团武汉暖通设备有限公司 | Air conditioner control method, air conditioner and storage medium |
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