CN105180351A - Air-conditioner control method and air-conditioner - Google Patents
Air-conditioner control method and air-conditioner Download PDFInfo
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- CN105180351A CN105180351A CN201510482370.8A CN201510482370A CN105180351A CN 105180351 A CN105180351 A CN 105180351A CN 201510482370 A CN201510482370 A CN 201510482370A CN 105180351 A CN105180351 A CN 105180351A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air-conditioner control method. The air-conditioner control method includes the following steps: obtaining the coiler middle temperature and the coiler outlet temperature of an outdoor heat exchanger of an air-conditioner; controlling a compressor of the air-conditioner to work according to a preset control rule when the difference value between the coiler middle temperature and the coiler outlet temperature is within a preset temperature threshold, and therefore decreasing the temperature of the outdoor heat exchanger. The invention further discloses the air-conditioner. As the compressor is controlled to work according to the difference value between the coiler middle temperature and the coiler outlet temperature of the outdoor heat exchanger, whether the heat exchange capability of the outdoor heat exchanger drops or not can be accurately judged, the compressor can be controlled to work in time when it is determined that the heat exchange capability of the outdoor heat exchanger drops so as to improve the heat exchange capability of the outdoor heat exchanger and achieve the aim of decreasing the temperature of the outdoor heat exchanger, and the reliability of the air-conditioner is further improved.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly relate to a kind of air-conditioner control method and air-conditioner.
Background technology
Air-conditioner operationally, the temperature of its outdoor heat exchanger is higher, when working especially in high temperature environments, the exchange capability of heat of outdoor heat exchanger declines, therefore the temperature of outdoor heat exchanger can be caused more and more higher, be increased to a certain degree in the temperature of outdoor heat exchanger, cause the damage of components and parts possibly.
In prior art; in order to make outdoor heat exchanger can self-protection when exchange capability of heat declines and causes temperature too high; general by monitoring outdoor heat exchanger outlet temperature; and when the outlet temperature of outdoor heat exchanger reaches predetermined threshold value; control compressor is out of service, thus is reached for outdoor heat exchanger and lowers the temperature and the object protecting outdoor heat exchanger.
But; when the exchange capability of heat of outdoor heat exchanger drops to a certain degree; even if now the outlet temperature of outdoor heat exchanger does not reach predetermined threshold value; the temperature of outdoor heat exchanger will be directly caused to raise fast when exchange capability of heat due to outdoor heat exchanger is lower; therefore; when the exchange capability of heat of outdoor heat exchanger declines, air-conditioner just should take safeguard measure to improve the reliability of off-premises station.But, can not reflect owing to only relying on the outlet temperature of outdoor heat exchanger whether the exchange capability of heat of outdoor heat exchanger declines accurately, the defect of prior art is, air-conditioner can accurately not judge whether the exchange capability of heat of outdoor heat exchanger declines, thus causes the reliability of air-conditioner lower.
Summary of the invention
Main purpose of the present invention is to provide a kind of air-conditioner control method and air-conditioner, is intended to solve air-conditioner and can accurately judge whether the exchange capability of heat of outdoor heat exchanger declines, thus cause the technical problem that the reliability of air-conditioner is lower.
Air-conditioner control method provided by the invention comprises the following steps:
Obtain coil pipe middle portion temperature and the Coil outlet temperature of air conditioner chamber's external heat exchanger;
When difference between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, to reduce the temperature of described outdoor heat exchanger.
Preferably, when described difference between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, comprise with the step of the temperature reducing described outdoor heat exchanger:
When difference between described coil pipe middle portion temperature and Coil outlet temperature is less than or equal to the first preset temperature threshold value, control described compressor out of service.
Preferably, when described difference between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, also comprise with the step of the temperature reducing described outdoor heat exchanger:
When difference between described coil pipe middle portion temperature and Coil outlet temperature is greater than described first preset temperature threshold value and is less than or equal to the second preset temperature threshold value, the running frequency controlling described compressor reduces gradually;
Wherein, described first preset temperature threshold value is less than described second preset temperature threshold value.
Preferably, when described difference between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, also comprise with the step of the temperature reducing described outdoor heat exchanger:
When difference between described coil pipe middle portion temperature and Coil outlet temperature is greater than described second preset temperature threshold value and is less than or equal to the 3rd preset temperature threshold value, the running frequency controlling described compressor remains unchanged;
Wherein, described second preset temperature threshold value is less than described 3rd preset temperature threshold value.
Preferably, when described difference between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, also comprise with the step of the temperature reducing described outdoor heat exchanger:
When difference between described coil pipe middle portion temperature and Coil outlet temperature is greater than described 3rd preset temperature threshold value and is less than or equal to the 4th preset temperature threshold value, the speed that the running frequency controlling described compressor raises reduces gradually;
Wherein, described 3rd preset temperature threshold value is less than described 4th preset temperature threshold value.
Preferably, when described difference between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, before the step reducing the temperature of described outdoor heat exchanger, described air-conditioner control method also comprises:
Judge whether described Coil outlet temperature is greater than the 5th preset temperature threshold value;
When described Coil outlet temperature is greater than the 5th preset temperature threshold value, when difference described in performing between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, to reduce the step of the temperature of described outdoor heat exchanger.
In addition, air-conditioner provided by the invention comprises compressor, outdoor heat exchanger and controller, described air-conditioner also comprise be located at described outdoor heat exchanger coil pipe in the middle part of the first temperature sensor and be located at second temperature sensor of coil outlet of described outdoor heat exchanger, described first temperature sensor is all connected with described controller with the second temperature sensor;
Described controller obtains the coil pipe middle portion temperature signal of described first temperature sensor detection and the Coil outlet temperature signal of described second temperature sensor detection;
When the difference of described controller between described coil pipe middle portion temperature signal and Coil outlet temperature signal meets preset temperature threshold range, according to compressor operating described in default control rule control, to reduce the temperature of described outdoor heat exchanger.
Preferably, described controller, also for after air-conditioner start runs Preset Time, obtains the coil pipe middle portion temperature signal of described first temperature sensor detection and the Coil outlet temperature signal of described second temperature sensor detection.
Preferably, when described controller is also less than or equal to the first preset temperature threshold value for the difference between described coil pipe middle portion temperature signal and Coil outlet temperature signal, described compressor is controlled out of service.
Preferably, when described controller is also greater than described first preset temperature threshold value for the difference between described coil pipe middle portion temperature signal and Coil outlet temperature signal and is less than or equal to the second preset temperature threshold value, the running frequency controlling described compressor reduces gradually;
Wherein, described first preset temperature threshold value is less than described second preset temperature threshold value.
Preferably, when described controller is also greater than described second preset temperature threshold value for the difference between described coil pipe middle portion temperature signal and Coil outlet temperature signal and is less than or equal to the 3rd preset temperature threshold value, the running frequency controlling described compressor remains unchanged;
Wherein, described second preset temperature threshold value is less than described 3rd preset temperature threshold value.
Preferably, when described controller is also greater than described 3rd preset temperature threshold value for the difference between described coil pipe middle portion temperature signal and Coil outlet temperature signal and is less than or equal to the 4th preset temperature threshold value, the speed that the running frequency controlling described compressor raises reduces gradually;
Wherein, described 3rd preset temperature threshold value is less than described 4th preset temperature threshold value.
Preferably, described controller is also for judging whether described Coil outlet temperature signal is greater than the 5th preset temperature threshold value, and when described Coil outlet temperature signal is greater than the 5th preset temperature threshold value, when difference again between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, to reduce the temperature of described outdoor heat exchanger
Air-conditioner control method provided by the invention and air-conditioner, by obtaining coil pipe middle portion temperature and the Coil outlet temperature of air conditioner chamber's external heat exchanger, and the difference between described coil pipe middle portion temperature and Coil outlet temperature is when meeting preset temperature threshold range, according to the compressor operating of default control rule control air-conditioner, thus improve the exchange capability of heat of outdoor heat exchanger, to reduce the temperature of outdoor heat exchanger.The present invention controls compressor operating according to the difference of the coil pipe middle portion temperature of outdoor heat exchanger and Coil outlet temperature, thus can judge whether the exchange capability of heat of outdoor heat exchanger declines accurately, and when determining that the exchange capability of heat of outdoor heat exchanger declines, can timely according to default control rule control compressor operating, to improve the exchange capability of heat of outdoor heat exchanger, reach the object reducing outdoor heat exchange actuator temperature, and then improve the reliability of air-conditioner.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of air-conditioner control method first embodiment of the present invention;
Fig. 2 is the principle schematic of air-conditioner preferred embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of air-conditioner control method, be applied in air-conditioner, this air-conditioner comprises compressor, outdoor heat exchanger and controller.With reference to the schematic flow sheet that Fig. 1, Fig. 1 are air-conditioner control method first embodiment of the present invention, the air-conditioner control method that the present invention proposes comprises the following steps:
Step S10, obtains coil pipe middle portion temperature and the Coil outlet temperature of air conditioner chamber's external heat exchanger;
In the present embodiment, above-mentioned air-conditioner also comprise be located at described outdoor heat exchanger coil pipe in the middle part of the first temperature sensor and be located at second temperature sensor of coil outlet of described outdoor heat exchanger, described first temperature sensor is all connected with described controller with the second temperature sensor.Temperature in the middle part of the coil pipe of described first temperature sensor real-time sensing chamber external heat exchanger, the temperature of the coil outlet of described second temperature sensor real-time sensing chamber external heat exchanger.
Controller can in real time or timing acquisition first temperature sensor detect coil pipe middle portion temperature signal and the second temperature sensor detect coil outlets signal.Such as, controller can obtain the coil pipe middle portion temperature signal of a first temperature sensor detection and the coil outlets signal of the second temperature sensor detection after preset interval time.Preset interval time can be such as about 10 minutes.
Step S20, when the difference between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, to reduce the temperature of described outdoor heat exchanger.
In the present embodiment and following examples, the difference between coil pipe middle portion temperature and Coil outlet temperature is the difference that coil pipe middle portion temperature deducts Coil outlet temperature.
After controller gets coil pipe middle portion temperature signal and Coil outlet temperature signal, calculate the difference between coil pipe middle portion temperature signal and Coil outlet temperature signal.Above-mentioned preset temperature threshold range such as being less than a certain preset temperature threshold value, or between certain two preset temperature threshold value, specifically can be arranged according to actual needs, in this no limit.
Above-mentioned default control rule can be such as; difference in coils between portion's temperature and Coil outlet temperature be less than a certain preset temperature threshold value or between certain two preset temperature threshold value time; then control compressor shutdown; or the running frequency controlling compressor reduces gradually; or the running frequency controlling compressor remains unchanged; or the speed that the running frequency controlling compressor raises reduces gradually; thus the exchange capability of heat of outdoor heat exchanger can be improved; and then reduce the temperature of outdoor heat exchanger, improve the reliability of air-conditioner.
When the difference that it should be noted that between described coil pipe middle portion temperature and Coil outlet temperature does not meet preset temperature threshold range, then control compressor and normally run.
Air-conditioner control method provided by the invention, by obtaining coil pipe middle portion temperature and the Coil outlet temperature of air conditioner chamber's external heat exchanger, and the difference between described coil pipe middle portion temperature and Coil outlet temperature is when meeting preset temperature threshold range, according to the compressor operating of default control rule control air-conditioner, thus improve the exchange capability of heat of outdoor heat exchanger, to reduce the temperature of outdoor heat exchanger.The present invention controls compressor operating according to the difference of the coil pipe middle portion temperature of outdoor heat exchanger and Coil outlet temperature, thus can judge whether the exchange capability of heat of outdoor heat exchanger declines accurately, and when determining that the exchange capability of heat of outdoor heat exchanger declines, can timely according to default control rule control compressor operating, to improve the exchange capability of heat of outdoor heat exchanger, reach the object reducing outdoor heat exchange actuator temperature, and then improve the reliability of air-conditioner.
Further, the accuracy whether exchange capability of heat of outdoor heat exchanger declines is judged in order to improve air-conditioner further, based on the first embodiment of air-conditioner control method of the present invention, the invention allows for the second embodiment of air-conditioner control method, step S10 comprises: after air-conditioner start runs Preset Time, obtains coil pipe middle portion temperature and the Coil outlet temperature of air conditioner chamber's external heat exchanger.
In the present embodiment, due to air-conditioner just bring into operation time, temperature and the environment temperature of its outdoor heat exchanger are suitable, therefore the coil pipe middle portion temperature of outdoor heat exchanger is suitable with Coil outlet temperature, cause the coil pipe middle portion temperature of outdoor heat exchanger and the difference between Coil outlet temperature less even identical, on the one hand, because outdoor heat exchanger is just started working, therefore there is not the problem that exchange capability of heat declines, the erroneous judgement that the exchange capability of heat of outdoor heat exchanger is declined can be caused on the other hand.Therefore, after air-conditioner start runs Preset Time, the operation that now air-conditioner can be stable, controller obtains coil pipe middle portion temperature and Coil outlet temperature again, and control compressor operating according to coil pipe middle portion temperature and Coil outlet temperature, thus can judge whether the exchange capability of heat of outdoor heat exchanger declines more accurately.Above-mentioned Preset Time can be arranged according to actual needs, such as, can be 10 minutes, 20 minutes etc.
Further, in order to improve the reliability of air-conditioner further, based on the first or second embodiment of air-conditioner control method of the present invention, the invention allows for the 3rd embodiment of air-conditioner control method, step S20 comprises: when the difference between described coil pipe middle portion temperature and Coil outlet temperature is less than or equal to the first preset temperature threshold value, control described compressor out of service.
In the present embodiment, the size of the first preset temperature threshold value can be arranged according to actual needs.Preferably, the first preset temperature threshold value is more than or equal to 0.5 DEG C, and is less than or equal to 2 DEG C.
When difference in coils between portion's temperature and Coil outlet temperature is less than or equal to the first preset temperature threshold value; then think that now coil pipe middle portion temperature and Coil outlet temperature are quite close; therefore now the exchange capability of heat of outdoor heat exchanger is on duty mutually; even lose exchange capability of heat; the temperature of outdoor heat exchanger will be caused to rise fast; therefore compressor is needed to shut down in time; to be reached for the object of outdoor heat exchanger cooling; the components and parts that effectively prevent outdoor heat exchanger are damaged, improve the reliability of air-conditioner.
Further, in order to improve the reliability of air-conditioner further, based on the first to the 3rd any embodiment of air-conditioner control method of the present invention, the invention allows for the 4th embodiment of air-conditioner control method, step S20 also comprises: when the difference between described coil pipe middle portion temperature and Coil outlet temperature is greater than the first preset temperature threshold value and is less than or equal to the second preset temperature threshold value, the running frequency controlling described compressor reduces gradually; Wherein, described first preset temperature threshold value is less than described second preset temperature threshold value.
In the present embodiment, the first preset temperature threshold value can with reference to above-mentioned 3rd embodiment.The size of the second preset temperature threshold value can be arranged according to actual needs.Preferably, the second preset temperature threshold value is more than or equal to 4 DEG C, and is less than or equal to 6 DEG C.
When difference in coils between portion's temperature and Coil outlet temperature is greater than the first preset temperature threshold value and is less than or equal to the second preset temperature threshold value, then think that now coil pipe middle portion temperature and Coil outlet temperature are relatively, therefore now the exchange capability of heat of outdoor heat exchanger is poor, the phenomenon that the exchange capability of heat of outdoor heat exchanger declines fast is probably there is again through after a period of time, therefore the running frequency of compressor is needed to reduce gradually, to be reached for the object of outdoor heat exchanger cooling, the components and parts that effectively prevent outdoor heat exchanger are damaged, improve the reliability of air-conditioner.
The mode that the running frequency controlling compressor reduces gradually can be arranged according to actual needs, such as, when Preset Time, the running frequency of compressor can be reduced predeterminated frequency value, or the form of the running frequency of compressor according to linearity curve or nonlinear curve is reduced.
Further, in order to improve the reliability of air-conditioner further, based on first to fourth any embodiment of air-conditioner control method of the present invention, the invention allows for the 5th embodiment of air-conditioner control method, step S20 also comprises: when the difference between described coil pipe middle portion temperature and Coil outlet temperature is greater than described second preset temperature threshold value and is less than or equal to the 3rd preset temperature threshold value, the running frequency controlling described compressor remains unchanged; Wherein, described second preset temperature threshold value is less than described 3rd preset temperature threshold value.
In the present embodiment, the second preset temperature threshold value can with reference to above-mentioned 4th embodiment.The size of the 3rd preset temperature threshold value can be arranged according to actual needs.Preferably, the 3rd preset temperature threshold value is more than or equal to 6 DEG C, and is less than or equal to 8 DEG C.
When difference in coils between portion's temperature and Coil outlet temperature is greater than the second preset temperature threshold value and is less than or equal to the 3rd preset temperature threshold value, then think that now coil pipe middle portion temperature and Coil outlet temperature are more or less the same, the phenomenon that the exchange capability of heat of outdoor heat exchanger declines probably is there is again through after a period of time, therefore the running frequency of compressor is needed to remain unchanged, prevent the running frequency of compressor from raising to such an extent as to the decline of the exchange capability of heat of outdoor heat exchanger, effectively prevent the temperature of outdoor heat exchanger to raise in time, improve the reliability of air-conditioner.
Further, in order to improve the reliability of air-conditioner further, based on the first to the 5th any embodiment of air-conditioner control method of the present invention, the invention allows for the 6th embodiment of air-conditioner control method, step S20 also comprises: when the difference between described coil pipe middle portion temperature and Coil outlet temperature is greater than described 3rd preset temperature threshold value and is less than or equal to the 4th preset temperature threshold value, and the speed that the running frequency controlling described compressor raises reduces gradually; Wherein, described 3rd preset temperature threshold value is less than described 4th preset temperature threshold value.
In the present embodiment, the 3rd preset temperature threshold value can with reference to above-mentioned 5th embodiment.The size of the 4th preset temperature threshold value can be arranged according to actual needs.Preferably, the 4th preset temperature threshold value is more than or equal to 8 DEG C, and is less than or equal to 10 DEG C.
When difference in coils between portion's temperature and Coil outlet temperature is greater than the 3rd preset temperature threshold value and is less than or equal to the 4th preset temperature threshold value, then think that now coil pipe middle portion temperature and Coil outlet temperature are more or less the same, the phenomenon that the exchange capability of heat of outdoor heat exchanger declines may be there is again through after a period of time, therefore the speed that the running frequency controlling compressor in time raises is needed, with prevent due to compressor running frequency raise too fast and cause the exchange capability of heat of outdoor heat exchanger to decline phenomenon generation, effectively improve the reliability of air-conditioner.
The mode that reduces gradually of speed that the running frequency controlling compressor raises can be arranged according to actual needs, and preferably, the speed that the running frequency controlling compressor raises reduced gradually along with the time.Such as, compressor can be controlled and raise the rate reduction of 5HZ extremely every prefixed time interval rising 4HZ by initial every prefixed time interval, and then be reduced to every prefixed time interval rising 3HZ etc., as long as the rate reduction that the running frequency of compressor raises can be made.
Further, in order to improve the reliability of air-conditioner further, based on the first to the 6th any embodiment of air-conditioner control method of the present invention, the invention allows for the 7th embodiment of air-conditioner control method, before step S20, described air-conditioner control method also comprises:
Judge whether described Coil outlet temperature is greater than the 5th preset temperature threshold value;
When described Coil outlet temperature is greater than the 5th preset temperature threshold value, perform step S20.
In the present embodiment, the size of the 5th preset temperature threshold value can be arranged according to actual needs.Preferably, the 5th preset temperature threshold value is more than or equal to 50 DEG C, and is less than or equal to 70 DEG C.
In the present embodiment, by first judging whether Coil outlet temperature is greater than the 5th preset temperature threshold value, and only when Coil outlet temperature is greater than the 5th preset temperature threshold value perform step S20, thus effectively prevent to outdoor heat exchanger exchange capability of heat whether decline occur erroneous judgement situation occur.Such as, when air-conditioner is just started shooting, difference between coil pipe middle portion temperature and Coil outlet temperature is less even identical, although the difference namely between coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, but because air-conditioner is just started working, now coil pipe middle portion temperature and Coil outlet temperature are all lower, therefore, now Coil outlet temperature is less than the 5th preset temperature threshold value, controller can not according to the compressor operating of default control rule air-conditioner, to reduce the temperature of outdoor heat exchanger, thus the present embodiment effectively prevent to outdoor heat exchanger exchange capability of heat whether decline occur erroneous judgement situation occur, further increase the reliability of air-conditioner.
The present invention further provides a kind of air-conditioner.
With reference to Fig. 2, Fig. 2 is the principle schematic of air-conditioner preferred embodiment of the present invention, air-conditioner provided by the invention comprises compressor 10, outdoor heat exchanger (not indicating in figure) and controller 20, described air-conditioner also comprise be located at described outdoor heat exchanger coil pipe in the middle part of the first temperature sensor 30 and be located at second temperature sensor 40 of coil outlet of described outdoor heat exchanger, described first temperature sensor 30 is all connected with described controller 20 with the second temperature sensor 40;
Described controller 20 obtains the coil pipe middle portion temperature signal of described first temperature sensor 30 detection and the Coil outlet temperature signal of described second temperature sensor 40 detection;
When the difference of described controller 20 between described coil pipe middle portion temperature signal and Coil outlet temperature signal meets preset temperature threshold range, work according to compressor 10 described in default control rule control, to reduce the temperature of described outdoor heat exchanger.
In the present embodiment and following examples, the difference between coil pipe middle portion temperature and Coil outlet temperature is the difference that coil pipe middle portion temperature deducts Coil outlet temperature.
In the present embodiment, controller 20 can in real time or timing acquisition first temperature sensor 30 detect coil pipe middle portion temperature signal and the second temperature sensor 40 detect coil outlets signal.Such as, controller 20 can obtain the coil pipe middle portion temperature signal of first temperature sensor 30 detection and the coil outlets signal of the second temperature sensor 40 detection after preset interval time.Preset interval time can be such as about 10 minutes.
After controller 20 gets coil pipe middle portion temperature signal and Coil outlet temperature signal, calculate the difference between coil pipe middle portion temperature signal and Coil outlet temperature signal.Above-mentioned preset temperature threshold range such as being less than a certain preset temperature threshold value, or between certain two preset temperature threshold value, specifically can be arranged according to actual needs, in this no limit.
Above-mentioned default control rule can be such as; difference in coils between portion's temperature and Coil outlet temperature be less than a certain preset temperature threshold value or between certain two preset temperature threshold value time; then control compressor 10 to shut down; or the running frequency controlling compressor 10 reduces gradually; or the running frequency controlling compressor 10 remains unchanged; or the speed that the running frequency controlling compressor 10 raises reduces gradually; thus the exchange capability of heat of outdoor heat exchanger can be improved; and then reduce the temperature of outdoor heat exchanger, improve the reliability of air-conditioner.
When the difference that it should be noted that between described coil pipe middle portion temperature and Coil outlet temperature does not meet preset temperature threshold range, then control compressor 10 and normally run.
Air-conditioner provided by the invention, by obtaining coil pipe middle portion temperature and the Coil outlet temperature of air conditioner chamber's external heat exchanger, and the difference between described coil pipe middle portion temperature and Coil outlet temperature is when meeting preset temperature threshold range, work according to the compressor 10 of default control rule control air-conditioner, thus improve the exchange capability of heat of outdoor heat exchanger, to reduce the temperature of outdoor heat exchanger.The present invention works according to the difference control compressor 10 of the coil pipe middle portion temperature of outdoor heat exchanger and Coil outlet temperature, thus can judge whether the exchange capability of heat of outdoor heat exchanger declines accurately, and when determining that the exchange capability of heat of outdoor heat exchanger declines, can work according to default control rule control compressor 10 timely, to improve the exchange capability of heat of outdoor heat exchanger, reach the object reducing outdoor heat exchange actuator temperature, and then improve the reliability of air-conditioner.
Further, the accuracy whether exchange capability of heat of outdoor heat exchanger declines is judged in order to improve air-conditioner further, based on the first embodiment of air-conditioner of the present invention, the invention allows for the second embodiment of air-conditioner, described controller 20, also for after air-conditioner start runs Preset Time, obtains the coil pipe middle portion temperature signal of described first temperature sensor 30 detection and the Coil outlet temperature signal of described second temperature sensor 40 detection.
In the present embodiment, due to air-conditioner just bring into operation time, temperature and the environment temperature of its outdoor heat exchanger are suitable, therefore the coil pipe middle portion temperature of outdoor heat exchanger is suitable with Coil outlet temperature, cause the coil pipe middle portion temperature of outdoor heat exchanger and the difference between Coil outlet temperature less even identical, on the one hand, because outdoor heat exchanger is just started working, therefore there is not the problem that exchange capability of heat declines, the erroneous judgement that the exchange capability of heat of outdoor heat exchanger is declined can be caused on the other hand.Therefore, after air-conditioner start runs Preset Time, the operation that now air-conditioner can be stable, controller 20 obtains coil pipe middle portion temperature and Coil outlet temperature again, and work according to coil pipe middle portion temperature and Coil outlet temperature control compressor 10, thus can judge whether the exchange capability of heat of outdoor heat exchanger declines more accurately.Above-mentioned Preset Time can be arranged according to actual needs, such as, can be 10 minutes, 20 minutes etc.
Further, in order to improve the reliability of air-conditioner further, based on the first or second embodiment of air-conditioner of the present invention, the invention allows for the 3rd embodiment of air-conditioner, when described controller 20 is also less than or equal to the first preset temperature threshold value for the difference between described coil pipe middle portion temperature signal and Coil outlet temperature signal, control described compressor 10 out of service.
In the present embodiment, the size of the first preset temperature threshold value can be arranged according to actual needs.Preferably, the first preset temperature threshold value is more than or equal to 0.5 DEG C, and is less than or equal to 2 DEG C.
When difference in coils between portion's temperature and Coil outlet temperature is less than or equal to the first preset temperature threshold value; then think that now coil pipe middle portion temperature and Coil outlet temperature are quite close; therefore now the exchange capability of heat of outdoor heat exchanger is on duty mutually; even lose exchange capability of heat; the temperature of outdoor heat exchanger will be caused to rise fast; therefore compressor 10 is needed to shut down in time; to be reached for the object of outdoor heat exchanger cooling; the components and parts that effectively prevent outdoor heat exchanger are damaged, improve the reliability of air-conditioner.
Further, in order to improve the reliability of air-conditioner further, based on the first to the 3rd any embodiment of air-conditioner of the present invention, the invention allows for the 4th embodiment of air-conditioner, when described controller 20 is also greater than described first preset temperature threshold value for the difference between described coil pipe middle portion temperature signal and Coil outlet temperature signal and is less than or equal to the second preset temperature threshold value, the running frequency controlling described compressor 10 reduces gradually; Wherein, described first preset temperature threshold value is less than described second preset temperature threshold value.
In the present embodiment, the first preset temperature threshold value can with reference to above-mentioned 3rd embodiment.The size of the second preset temperature threshold value can be arranged according to actual needs.Preferably, the second preset temperature threshold value is more than or equal to 4 DEG C, and is less than or equal to 6 DEG C.
When difference in coils between portion's temperature and Coil outlet temperature is greater than the first preset temperature threshold value and is less than or equal to the second preset temperature threshold value, then think that now coil pipe middle portion temperature and Coil outlet temperature are relatively, therefore now the exchange capability of heat of outdoor heat exchanger is poor, the phenomenon that the exchange capability of heat of outdoor heat exchanger declines fast is probably there is again through after a period of time, therefore the running frequency of compressor 10 is needed to reduce gradually, to be reached for the object of outdoor heat exchanger cooling, the components and parts that effectively prevent outdoor heat exchanger are damaged, improve the reliability of air-conditioner.
The mode that the running frequency controlling compressor 10 reduces gradually can be arranged according to actual needs, such as, when Preset Time, the running frequency of compressor 10 can be reduced predeterminated frequency value, or the form of the running frequency of compressor 10 according to linearity curve or nonlinear curve is reduced.
Further, in order to improve the reliability of air-conditioner further, based on first to fourth any embodiment of air-conditioner of the present invention, the invention allows for the 5th embodiment of air-conditioner, when described controller 20 is also greater than described second preset temperature threshold value for the difference between described coil pipe middle portion temperature signal and Coil outlet temperature signal and is less than or equal to the 3rd preset temperature threshold value, the running frequency controlling described compressor 10 remains unchanged; Wherein, described second preset temperature threshold value is less than described 3rd preset temperature threshold value.
In the present embodiment, the second preset temperature threshold value can with reference to above-mentioned 4th embodiment.The size of the 3rd preset temperature threshold value can be arranged according to actual needs.Preferably, the 3rd preset temperature threshold value is more than or equal to 6 DEG C, and is less than or equal to 8 DEG C.
When difference in coils between portion's temperature and Coil outlet temperature is greater than the second preset temperature threshold value and is less than or equal to the 3rd preset temperature threshold value, then think that now coil pipe middle portion temperature and Coil outlet temperature are more or less the same, the phenomenon that the exchange capability of heat of outdoor heat exchanger declines probably is there is again through after a period of time, therefore the running frequency of compressor 10 is needed to remain unchanged, prevent the running frequency of compressor 10 from raising to such an extent as to the decline of the exchange capability of heat of outdoor heat exchanger, the temperature of outdoor heat exchanger is effectively prevented to raise in time, improve the reliability of air-conditioner.
Further, in order to improve the reliability of air-conditioner further, based on the first to the 5th any embodiment of air-conditioner of the present invention, the invention allows for the 6th embodiment of air-conditioner, when described controller 20 is also greater than described 3rd preset temperature threshold value for the difference between described coil pipe middle portion temperature signal and Coil outlet temperature signal and is less than or equal to the 4th preset temperature threshold value, the speed that the running frequency controlling described compressor 10 raises reduces gradually; Wherein, described 3rd preset temperature threshold value is less than described 4th preset temperature threshold value.
In the present embodiment, the 3rd preset temperature threshold value can with reference to above-mentioned 5th embodiment.The size of the 4th preset temperature threshold value can be arranged according to actual needs.Preferably, the 4th preset temperature threshold value is more than or equal to 8 DEG C, and is less than or equal to 10 DEG C.
When difference in coils between portion's temperature and Coil outlet temperature is greater than the 3rd preset temperature threshold value and is less than or equal to the 4th preset temperature threshold value, then think that now coil pipe middle portion temperature and Coil outlet temperature are more or less the same, the phenomenon that the exchange capability of heat of outdoor heat exchanger declines may be there is again through after a period of time, therefore the speed that the running frequency controlling compressor 10 in time raises is needed, with prevent due to compressor 10 running frequency raise too fast and cause the exchange capability of heat of outdoor heat exchanger to decline phenomenon generation, effectively improve the reliability of air-conditioner.
The mode that reduces gradually of speed that the running frequency controlling compressor 10 raises can be arranged according to actual needs, and preferably, the speed that the running frequency controlling compressor raises reduced gradually along with the time.Such as, compressor 10 can be controlled and raise the rate reduction of 5HZ extremely every prefixed time interval rising 4HZ by initial every prefixed time interval, and then be reduced to every prefixed time interval rising 3HZ etc., as long as the rate reduction that the running frequency of compressor 10 raises can be made.
Further, in order to improve the reliability of air-conditioner further, based on the first to the 6th any embodiment of air-conditioner of the present invention, the invention allows for the 7th embodiment of air-conditioner, described controller 20 is also for judging whether described Coil outlet temperature signal is greater than the 5th preset temperature threshold value, and when described Coil outlet temperature signal is greater than the 5th preset temperature threshold value, when difference again between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, work according to the compressor 10 of air-conditioner described in default control rule control, to reduce the temperature of described outdoor heat exchanger.
In the present embodiment, the size of the 5th preset temperature threshold value can be arranged according to actual needs.Preferably, the 5th preset temperature threshold value is more than or equal to 50 DEG C, and is less than or equal to 70 DEG C.
In the present embodiment, by first judging whether Coil outlet temperature is greater than the 5th preset temperature threshold value, and only when Coil outlet temperature is greater than the 5th preset temperature threshold value perform step S20, thus effectively prevent to outdoor heat exchanger exchange capability of heat whether decline occur erroneous judgement situation occur.Such as, when air-conditioner is just started shooting, difference between coil pipe middle portion temperature and Coil outlet temperature is less even identical, although the difference namely between coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, but because air-conditioner is just started working, now coil pipe middle portion temperature and Coil outlet temperature are all lower, therefore, now Coil outlet temperature is less than the 5th preset temperature threshold value, controller 20 can not work according to the compressor 10 of default control rule air-conditioner, to reduce the temperature of outdoor heat exchanger, thus the present embodiment effectively prevent to outdoor heat exchanger exchange capability of heat whether decline occur erroneous judgement situation occur, further increase the reliability of air-conditioner.
It should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or device and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or device.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the device comprising this key element and also there is other identical element.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that above-described embodiment method can add required general hardware platform by software and realize, hardware can certainly be passed through, but in a lot of situation, the former is better embodiment.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium (as ROM/RAM, magnetic disc, CD), comprising some instructions in order to make a station terminal equipment (can be mobile phone, computer, server, air-conditioner, or the network equipment etc.) perform method described in each embodiment of the present invention.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (13)
1. an air-conditioner control method, is characterized in that, described air-conditioner control method comprises the following steps:
Obtain coil pipe middle portion temperature and the Coil outlet temperature of air conditioner chamber's external heat exchanger;
When difference between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, to reduce the temperature of described outdoor heat exchanger.
2. air-conditioner control method as claimed in claim 1, it is characterized in that, when described difference between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, comprise with the step of the temperature reducing described outdoor heat exchanger:
When difference between described coil pipe middle portion temperature and Coil outlet temperature is less than or equal to the first preset temperature threshold value, control described compressor out of service.
3. air-conditioner control method as claimed in claim 2, it is characterized in that, when described difference between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, also comprise with the step of the temperature reducing described outdoor heat exchanger:
When difference between described coil pipe middle portion temperature and Coil outlet temperature is greater than described first preset temperature threshold value and is less than or equal to the second preset temperature threshold value, the running frequency controlling described compressor reduces gradually;
Wherein, described first preset temperature threshold value is less than described second preset temperature threshold value.
4. air-conditioner control method as claimed in claim 3, it is characterized in that, when described difference between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, also comprise with the step of the temperature reducing described outdoor heat exchanger:
When difference between described coil pipe middle portion temperature and Coil outlet temperature is greater than described second preset temperature threshold value and is less than or equal to the 3rd preset temperature threshold value, the running frequency controlling described compressor remains unchanged;
Wherein, described second preset temperature threshold value is less than described 3rd preset temperature threshold value.
5. air-conditioner control method as claimed in claim 4, it is characterized in that, when described difference between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, also comprise with the step of the temperature reducing described outdoor heat exchanger:
When difference between described coil pipe middle portion temperature and Coil outlet temperature is greater than described 3rd preset temperature threshold value and is less than or equal to the 4th preset temperature threshold value, the speed that the running frequency controlling described compressor raises reduces gradually;
Wherein, described 3rd preset temperature threshold value is less than described 4th preset temperature threshold value.
6. the air-conditioner control method as described in any one of claim 1 to 5, it is characterized in that, when described difference between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, before the step reducing the temperature of described outdoor heat exchanger, described air-conditioner control method also comprises:
Judge whether described Coil outlet temperature is greater than the 5th preset temperature threshold value;
When described Coil outlet temperature is greater than the 5th preset temperature threshold value, when difference described in performing between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, to reduce the step of the temperature of described outdoor heat exchanger.
7. an air-conditioner, described air-conditioner comprises compressor, outdoor heat exchanger and controller, it is characterized in that, described air-conditioner also comprise be located at described outdoor heat exchanger coil pipe in the middle part of the first temperature sensor and be located at second temperature sensor of coil outlet of described outdoor heat exchanger, described first temperature sensor is all connected with described controller with the second temperature sensor;
Described controller obtains the coil pipe middle portion temperature signal of described first temperature sensor detection and the Coil outlet temperature signal of described second temperature sensor detection;
When the difference of described controller between described coil pipe middle portion temperature signal and Coil outlet temperature signal meets preset temperature threshold range, according to compressor operating described in default control rule control, to reduce the temperature of described outdoor heat exchanger.
8. air-conditioner as claimed in claim 7, it is characterized in that, described controller, also for after air-conditioner start runs Preset Time, obtains the coil pipe middle portion temperature signal of described first temperature sensor detection and the Coil outlet temperature signal of described second temperature sensor detection.
9. air-conditioner as claimed in claim 7 or 8, is characterized in that, when described controller is also less than or equal to the first preset temperature threshold value for the difference between described coil pipe middle portion temperature signal and Coil outlet temperature signal, control described compressor out of service.
10. air-conditioner as claimed in claim 9, it is characterized in that, when described controller is also greater than described first preset temperature threshold value for the difference between described coil pipe middle portion temperature signal and Coil outlet temperature signal and is less than or equal to the second preset temperature threshold value, the running frequency controlling described compressor reduces gradually;
Wherein, described first preset temperature threshold value is less than described second preset temperature threshold value.
11. air-conditioners as claimed in claim 10, it is characterized in that, when described controller is also greater than described second preset temperature threshold value for the difference between described coil pipe middle portion temperature signal and Coil outlet temperature signal and is less than or equal to the 3rd preset temperature threshold value, the running frequency controlling described compressor remains unchanged;
Wherein, described second preset temperature threshold value is less than described 3rd preset temperature threshold value.
12. air-conditioners as claimed in claim 11, it is characterized in that, when described controller is also greater than described 3rd preset temperature threshold value for the difference between described coil pipe middle portion temperature signal and Coil outlet temperature signal and is less than or equal to the 4th preset temperature threshold value, the speed that the running frequency controlling described compressor raises reduces gradually;
Wherein, described 3rd preset temperature threshold value is less than described 4th preset temperature threshold value.
13. air-conditioners as described in any one of claim 7 to 12, it is characterized in that, described controller is also for judging whether described Coil outlet temperature signal is greater than the 5th preset temperature threshold value, and when described Coil outlet temperature signal is greater than the 5th preset temperature threshold value, when difference again between described coil pipe middle portion temperature and Coil outlet temperature meets preset temperature threshold range, according to the compressor operating of air-conditioner described in default control rule control, to reduce the temperature of described outdoor heat exchanger.
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