CN110779188A - Control method for improving high-load operation performance of air conditioner refrigeration - Google Patents
Control method for improving high-load operation performance of air conditioner refrigeration Download PDFInfo
- Publication number
- CN110779188A CN110779188A CN201911069522.6A CN201911069522A CN110779188A CN 110779188 A CN110779188 A CN 110779188A CN 201911069522 A CN201911069522 A CN 201911069522A CN 110779188 A CN110779188 A CN 110779188A
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- CN
- China
- Prior art keywords
- air conditioner
- main control
- control board
- heat exchanger
- inner fan
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- 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
- F24F11/41—Defrosting; Preventing freezing
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F2110/10—Temperature
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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
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses a control method for improving the high-load operation performance of air conditioner refrigeration, which is characterized by comprising the following steps of: (a) under the air-conditioning refrigeration mode, the air-conditioning main control board records the coil temperature T1 of the indoor heat exchanger, the coil temperature T2 of the outdoor heat exchanger or the exhaust temperature sensor T3 of the press in real time; (b) if the recorded T1 is not less than H1, T2 is not less than H2 or T3 is not less than H3 and the duration is T1, entering the step (c); (c) the air conditioner main control board controls the inner fan to reduce the current rotating speed by one gear; (d) and (c) after the step (c), continuing to reduce the rotating speed of the inner fan by one gear until the rotating speed of the inner fan is reduced to the lowest gear when the main control board of the air conditioner records T1 which is more than or equal to H1, T2 which is more than or equal to H2 or T3 which is more than or equal to H3 again and the duration is T2. The reduction of the rotating speed of the inner fan can reduce the working load of the compressor, so that the high load of the air conditioning system is effectively reduced.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a control method for improving the refrigeration high-load operation performance of an air conditioner.
Background
With the continuous improvement of living standard of people, the use requirement of the air conditioner is also improved, and the air conditioner is in a high-load operation state when used in a low-voltage and high-temperature environment. In order to prevent the compressor in the air conditioning system from being burnt out due to long-time high-load operation, self protective measures are arranged on the air conditioning compressor, and the compressor is temporarily closed by the self protective measures to stop refrigerating for a period of time. In hot summer, the air condition compressor is shut down many times and can't refrigerate, can lead to user experience relatively poor, and the life of compressor can shorten greatly.
In addition, at present, due to the environmental protection requirement, the environment-friendly refrigerant R32 is widely popularized and used in China, and the environment-friendly refrigerant R32 is characterized in that the working pressure is high, the exhaust temperature is higher than that of the R410A refrigerant by 6-10 degrees, and therefore the air conditioner is easy to enter a high-load state, and can be stopped more frequently.
Disclosure of Invention
The invention provides a control method for improving the high-load operation performance of air conditioner refrigeration, which effectively reduces the high load of an air conditioning system and enables an air conditioner to normally work at higher environmental temperature or lower power supply voltage.
In order to achieve the purpose, the invention provides the following technical scheme: a control method for improving the high-load operation performance of air conditioner refrigeration is characterized by comprising the following steps:
(a) under the air-conditioning refrigeration mode, the air-conditioning main control board records the coil temperature T1 of the indoor heat exchanger acquired by the indoor heat exchanger sensor, the coil temperature T2 of the outdoor heat exchanger acquired by the outdoor heat exchanger sensor or the compressor exhaust temperature T3 acquired by the compressor exhaust temperature sensor in real time;
(b) if the recorded T1 is not less than H1, T2 is not less than H2 or T3 is not less than H3 and the duration is T1, entering the step (c);
wherein: h1 is a coil high-temperature critical value of the indoor heat exchanger, H2 is a coil high-temperature critical value of the outdoor heat exchanger, and H3 is a high-temperature critical value of the exhaust gas of the press;
(c) the air conditioner main control board judges that the compressor is in a high-load state, and the air conditioner main control board controls the inner fan to reduce the current rotating speed by one gear for operation;
(d) if the rotating speed of the inner fan is reduced by one gear for operation, the rotating speed of the inner fan is reduced by one gear continuously until the rotating speed of the inner fan is reduced to the lowest gear, wherein T1 recorded by the air conditioner main control board is more than or equal to H1, T2 is more than or equal to H2 or T3 is more than or equal to H3, and the duration is T2;
(e) if the air conditioner main control board records that T2 is more than L1 or T3 is more than L2 and the duration is T3, the air conditioner main control board controls the inner fan to increase the current rotating speed by one gear for operation;
wherein: l1 is the coil temperature of the outdoor heat exchanger with the compressor at normal load;
l2 is the compressor discharge temperature at normal load condition of the compressor;
(f) and if the inner fan is increased to operate in the first gear, the air conditioner main control board records that T2 is more than L1 or T3 is more than L2 and the duration is T4, continuing to increase the inner fan to operate in the first gear until the rotating speed of the inner fan is increased to the set gear.
Preferably, (g) if T1 recorded by the air conditioner main control board is less than L3 after the action (c) is performed, the air conditioner main control board preferentially executes anti-freezing protection;
wherein: l3 is the indoor heat exchanger coil temperature entering the freeze protection state.
According to the technical scheme, the air conditioner main control board monitors the coil temperature T1 of the indoor heat exchanger acquired by the indoor heat exchanger sensor, the coil temperature T2 of the outdoor heat exchanger acquired by the outdoor heat exchanger sensor or the compressor exhaust temperature T3 acquired by the compressor exhaust temperature sensor in real time, when the measured T1 is more than or equal to H1, the T2 is more than or equal to H2 or the T3 is more than or equal to H3 and the duration time is T1, the compressor is in a high-load state, the air conditioner main control board controls the rotating speed of the internal fan to be reduced by one gear for operation, the evaporation capacity of the air conditioner system is reduced due to the reduction of the rotating speed of the internal fan, and then the working load of the compressor is reduced.
Drawings
Fig. 1 is a control flow chart of the present invention.
Detailed Description
A control method for improving the high-load operation performance of air conditioner refrigeration comprises the following steps:
(a) under the air-conditioning refrigeration mode, the air-conditioning main control board records the coil temperature T1 of the indoor heat exchanger acquired by the indoor heat exchanger sensor, the coil temperature T2 of the outdoor heat exchanger acquired by the outdoor heat exchanger sensor or the exhaust temperature T3 acquired by the press exhaust temperature sensor in real time;
(b) if the recorded T1 is not less than H1, T2 is not less than H2 or T3 is not less than H3 and the duration is T1, entering the step (c);
wherein: h1 is a coil high-temperature critical value of the indoor heat exchanger, H2 is a coil high-temperature critical value of the outdoor heat exchanger, and H3 is a high-temperature critical value of the exhaust temperature of the press; h1, H2 and H3 are all preset in the air conditioner main control board, and H1, H2 and H3 are respectively the coil temperature of the indoor heat exchanger, the coil temperature of the outdoor heat exchanger and the exhaust temperature of the compressor when the compressor is about to automatically stop under the high-load operation of the air conditioning system in a high-temperature environment.
(c) The air conditioner main control board judges that the compressor is in a high-load state, and the air conditioner main control board controls the inner fan to reduce the current rotating speed by one gear for operation; the reduction of the rotating speed of the inner fan can reduce the evaporation capacity of the air conditioning system, so that the working load of the compressor is reduced, and the high load of the air conditioning system is effectively reduced.
(d) If the rotating speed of the inner fan is reduced by one gear for operation, the rotating speed of the inner fan is reduced by one gear continuously until the rotating speed of the inner fan is reduced to the lowest gear, wherein T1 recorded by the air conditioner main control board is more than or equal to H1, T2 is more than or equal to H2 or T3 is more than or equal to H3, and the duration is T2; after the gear speed of the inner fan is reduced, the main control panel of the air conditioner measures that T1 is more than or equal to H1, T2 is more than or equal to H2 or T3 is more than or equal to H3 and the duration is T2, which shows that the compressor is still in a high-load state at the moment, and the load of the compressor needs to be reduced by reducing the rotating speed of the inner fan until the inner fan is reduced to the lowest gear.
(e) If the air conditioner main control board records that T2 is more than L1 or T3 is more than L2 and the duration is T3, the air conditioner main control board controls the inner fan to increase the current rotating speed by one gear for operation;
wherein: l1 is the coil temperature of the outdoor heat exchanger with the compressor at normal load;
l2 is the compressor discharge temperature at normal load condition of the compressor;
(f) and if the inner fan is increased to operate in the first gear, the air conditioner main control board records that T2 is more than L1 or T3 is more than L2 and the duration is T4, continuing to increase the inner fan to operate in the first gear until the rotating speed of the inner fan is increased to the set gear.
Preferably, the method further comprises the following steps:
(h) if the T1 recorded by the air conditioner main control board is less than L3, the air conditioner main control board executes anti-freezing protection;
wherein: l3 is the indoor heat exchanger coil temperature entering the freeze protection state. The anti-freezing protection function is to prevent the liquid refrigerant from entering the compressor to cause the damage of the compressor liquid compression due to the fact that the temperature of the evaporator tube is too low, when the T1 recorded by the air conditioner main control board is smaller than the L3, the temperature of the indoor heat exchanger coil is smaller than the temperature of the indoor heat exchanger coil entering the anti-freezing protection state, and the air conditioner main control board executes the anti-freezing protection.
Claims (2)
1. A control method for improving the high-load operation performance of air conditioner refrigeration is characterized by comprising the following steps:
(a) in an air-conditioning refrigeration mode, an air-conditioning main control board records the coil temperature T1 of an indoor heat exchanger acquired by an indoor heat exchanger sensor in real time, the coil temperature T2 of an outdoor heat exchanger acquired by an outdoor heat exchanger sensor or the compressor exhaust T3 acquired by a compressor exhaust temperature sensor;
(b) if the recorded T1 is not less than H1, T2 is not less than H2 or T3 is not less than H3 and the duration is T1, entering the step (c);
wherein: h1 is a coil high-temperature critical value of the indoor heat exchanger, H2 is a coil high-temperature critical value of the outdoor heat exchanger, and H3 is a high-temperature critical value of the exhaust gas of the press;
(c) the air conditioner main control board judges that the compressor is in a high-load state, and the air conditioner main control board controls the inner fan to reduce the current rotating speed by one gear for operation;
(d) if the rotating speed of the inner fan is reduced by one gear for operation, the air conditioner main control board records again that T1 is more than or equal to H1, T2 is more than or equal to H2 or T3 is more than or equal to H3, and the duration is T2, the rotating speed of the inner fan is continuously reduced by one gear for operation until the rotating speed of the inner fan is reduced to the lowest gear;
(e) if the air conditioner main control board records that T2 is more than L1 or T3 is more than L2 and the duration is T3, the air conditioner main control board controls the inner fan to increase the current rotating speed by one gear for operation;
wherein: l1 is the coil temperature of the outdoor heat exchanger with the compressor at normal load;
l2 is the compressor discharge temperature at normal load condition of the compressor;
(f) and if the inner fan is increased to operate in the first gear, the air conditioner main control board records that T2 is more than L1 or T3 is more than L2 and the duration is T4, continuing to increase the inner fan to operate in the first gear until the rotating speed of the inner fan is increased to the set gear.
2. The control method for improving the high-load operation performance of the refrigeration of the air conditioner as claimed in claim 1, further comprising the steps of:
(g) if the recorded T1 of the air-conditioning main control board is less than L3 after the operation of the step (c), the air-conditioning main control board preferentially executes anti-freezing protection;
wherein: l3 is the indoor heat exchanger coil temperature entering the freeze protection state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911069522.6A CN110779188A (en) | 2019-11-05 | 2019-11-05 | Control method for improving high-load operation performance of air conditioner refrigeration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911069522.6A CN110779188A (en) | 2019-11-05 | 2019-11-05 | Control method for improving high-load operation performance of air conditioner refrigeration |
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| CN110779188A true CN110779188A (en) | 2020-02-11 |
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| CN201911069522.6A Pending CN110779188A (en) | 2019-11-05 | 2019-11-05 | Control method for improving high-load operation performance of air conditioner refrigeration |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111023506A (en) * | 2019-12-20 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Method for reducing operation load of compressor and air conditioner |
| CN111365819A (en) * | 2020-03-26 | 2020-07-03 | 宁波奥克斯电气股份有限公司 | Control method and device for adjusting high-temperature refrigerating capacity of air conditioner and air conditioner |
| CN111578467A (en) * | 2020-05-12 | 2020-08-25 | 广东美的制冷设备有限公司 | Control method of air conditioning system and air conditioning system |
| CN113465044A (en) * | 2021-06-11 | 2021-10-01 | 青岛海尔空调电子有限公司 | Outdoor unit of air conditioner |
| CN114135986A (en) * | 2020-09-04 | 2022-03-04 | 广东美的制冷设备有限公司 | Air conditioner, method of controlling the same, and computer-readable storage medium |
| CN114893884A (en) * | 2022-04-24 | 2022-08-12 | 宁波奥克斯电气股份有限公司 | Control method for refrigeration overload protection of fixed-frequency air conditioner and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111365819A (en) * | 2020-03-26 | 2020-07-03 | 宁波奥克斯电气股份有限公司 | Control method and device for adjusting high-temperature refrigerating capacity of air conditioner and air conditioner |
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| CN114893884A (en) * | 2022-04-24 | 2022-08-12 | 宁波奥克斯电气股份有限公司 | Control method for refrigeration overload protection of fixed-frequency air conditioner and air conditioner |
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Application publication date: 20200211 |
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