CN112611089A - Control method for preventing air conditioner from repeatedly exhausting and protecting - Google Patents
Control method for preventing air conditioner from repeatedly exhausting and protecting Download PDFInfo
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- CN112611089A CN112611089A CN202011517978.7A CN202011517978A CN112611089A CN 112611089 A CN112611089 A CN 112611089A CN 202011517978 A CN202011517978 A CN 202011517978A CN 112611089 A CN112611089 A CN 112611089A
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- Prior art keywords
- compressor
- temperature
- exhaust
- air conditioner
- frequency
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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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/077—Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
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- 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 relates to a control method for preventing an air conditioner from repeatedly performing exhaust protection. The control method comprises the following steps: when the exhaust temperature of the compressor reaches an exhaust protection temperature point, starting exhaust protection by the air conditioner, recording the exhaust temperature of the compressor at the moment, recording the exhaust temperature of the compressor of the air conditioner in a frequency reduction mode, recording the exhaust temperature of the compressor for multiple times according to a set recording period, and correcting the frequency of the compressor by using a compressor frequency correction method after recording the exhaust temperature of the compressor for each time; the frequency correction method of the compressor comprises the following steps: and calculating the temperature difference between the recorded compressor exhaust temperature and the last recorded compressor exhaust temperature, comparing the size relation between the temperature difference and the first temperature threshold, the second temperature threshold and the third temperature threshold, and adjusting the frequency of the compressor according to the comparison result. The invention can more intelligently optimize the exhaust protection function of the air conditioner and avoid the repeated exhaust protection, thereby improving the user experience.
Description
Technical Field
The invention belongs to the technical field of air conditioner control, and particularly relates to a control method for preventing repeated exhaust protection aiming at an exhaust protection function of an air conditioner.
Background
When the inverter air conditioner operates, the exhaust temperature of the compressor is high, if the exhaust temperature exceeds a specified value, the compressor and the service life of the compressor are damaged, and the compressor is burnt, so the exhaust temperature of the compressor needs to be controlled.
The control logic of the existing air conditioner is as follows: when the exhaust temperature sensor detects that the exhaust temperature is too high and exceeds various set exhaust temperature protection points, the compressor is controlled to start slow frequency reduction, or fast frequency reduction, or stop.
By adopting the control method, when the air conditioner has over-high exhaust protection frequency reduction, because the frequency reduction speed of the compressor is inconsistent with the change speed of the exhaust temperature, namely delay exists between the change of the temperature and the change of the frequency of the compressor, when the frequency reduction removing temperature point of the exhaust protection is reached, the frequency reduction amplitude of the compressor is too large, the compressor is operated at a lower frequency, the lower operating frequency can continuously reduce the exhaust temperature, the limitation of the exhaust temperature protection control is avoided, the compressor is rapidly increased in frequency, the exhaust temperature is increased along with the increase of the frequency, and then the exhaust temperature reaches the exhaust temperature protection point, so the exhaust temperature protection phenomenon repeatedly occurs, as shown in the attached figure 1, the use experience of a user is seriously influenced: the outlet air temperature greatly changes (suddenly cool and suddenly hot); the noise of the outdoor unit is suddenly high and suddenly low; the consumed power is suddenly high or low, and the power grid is impacted.
Disclosure of Invention
The invention aims to provide a control method for preventing an air conditioner from repeatedly performing exhaust protection, which can more intelligently and optimally control a compressor and solve the problem of delay between control exhaust temperature and compressor frequency.
In order to achieve the purpose, the invention adopts the technical scheme that:
a control method for preventing an air conditioner from repeatedly performing exhaust protection comprises the following steps:
presetting a first temperature threshold t1, a second temperature threshold t2 and a third temperature threshold t3 according to the operating conditions of the air conditioner, wherein t1 is more than t2 and more than t 3;
when the air conditioner runs, detecting the exhaust temperature of a compressor of the air conditioner, when the exhaust temperature of the compressor reaches an exhaust protection temperature point, starting exhaust protection by the air conditioner, recording the exhaust temperature of the compressor at the moment, starting frequency reduction operation of the compressor of the air conditioner, recording the exhaust temperature of the compressor for multiple times according to a set recording period T, and after recording the exhaust temperature of the compressor each time, correcting the frequency of the compressor by using a compressor frequency correction method until the air conditioner stops exhaust protection;
the frequency correction method of the compressor comprises the following steps: calculating the temperature difference delta TD between the compressor exhaust temperature recorded this time and the compressor exhaust temperature recorded last time, comparing the temperature difference delta TD with the first temperature threshold t1, the second temperature threshold t2 and the third temperature threshold t3, adjusting the frequency of the compressor according to the comparison result, if the temperature difference delta TD is not more than t1, keeping the current frequency reduction speed of the compressor to continue frequency reduction, if the temperature difference delta TD is more than t1 and not more than t2, reducing the frequency reduction speed of the compressor to continue frequency reduction, and if the temperature difference delta TD is more than t2 and not more than t3, stopping frequency reduction of the compressor and keeping the current frequency running.
If the delta TD is more than t1 and less than or equal to t2, the frequency reduction speed of the compressor is reduced by 50 percent.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention can more intelligently optimize the exhaust protection function of the air conditioner and avoid the repeated exhaust protection, thereby improving the user experience.
Drawings
Fig. 1 is a schematic diagram of the exhaust protection control effect of a conventional air conditioner.
Fig. 2 is a schematic diagram illustrating a control method for preventing an air conditioner from repeatedly performing an exhaust protection according to the present invention.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings to which the invention is attached.
The first embodiment is as follows: a control method for preventing an air conditioner from repeatedly performing exhaust protection comprises the following steps:
the first temperature threshold t1, the second temperature threshold t2 and the third temperature threshold t3 are preset according to the operation conditions of the air conditioner, wherein t1 is more than t2 is more than t 3.
When the air conditioner runs, the exhaust temperature of the compressor of the air conditioner is detected, when the exhaust temperature of the compressor reaches the exhaust protection temperature point, the air conditioner starts exhaust protection, the exhaust temperature TD1 of the compressor at the moment is recorded, and the compressor of the air conditioner starts to run in a frequency reduction mode according to the preset frequency reduction speed. And then recording the exhaust temperature of the compressor for multiple times according to the set recording period T, and after recording the exhaust temperature of the compressor each time, correcting the frequency of the compressor by using a compressor frequency correction method until the air conditioner stops exhaust protection.
The frequency correction method of the compressor comprises the following steps: calculating the temperature difference delta TD between the recorded compressor exhaust temperature and the last recorded compressor exhaust temperature, comparing the temperature difference delta TD with the first temperature threshold t1, the second temperature threshold t2 and the third temperature threshold t3, adjusting the frequency of the compressor according to the comparison result, if the temperature difference delta TD is less than or equal to t1, keeping the current frequency reduction speed of the compressor to continue frequency reduction, if the temperature difference delta TD is more than t1 and less than or equal to t2, reducing the frequency reduction speed of the compressor to continue frequency reduction, and if the temperature difference delta TD is more than t2 and less than or equal to t3, stopping frequency reduction of the compressor and keeping the current frequency running.
For example, if the compressor discharge air temperature TD2 is recorded after T time has elapsed after the air conditioner starts the discharge protection, Δ TD = TD2-TD1, and the compressor frequency is corrected based on the above-described compressor frequency correction method according to the magnitude of Δ TD =. And after the T time, recording the compressor exhaust temperature TD3 again, comparing the compressor exhaust temperature with the temperature delta TD = TD3-TD2 again, correcting the compressor frequency, and so on until the air conditioner stops exhaust protection.
In the above scheme, when Δ TD is greater than t1 and less than or equal to t2, the specific scheme for reducing the frequency reduction speed of the compressor is as follows: the compressor down-conversion speed is reduced by 50%.
The effect of the control method for preventing the air conditioner from repeatedly performing the exhaust protection is shown in fig. 2.
The control method for preventing the air conditioner from repeatedly performing the exhaust protection is applied to the air conditioner, so that the control of the air conditioner is more intelligent, and the problem of reaction delay between the control exhaust temperature and the frequency of the compressor is optimized. The air conditioner includes a controller for executing the control method for preventing the air conditioner from repeatedly performing the exhaust protection.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (2)
1. A control method for preventing an air conditioner from repeatedly performing exhaust protection is characterized in that: the control method for preventing the air conditioner from repeatedly performing exhaust protection comprises the following steps:
presetting a first temperature threshold t1, a second temperature threshold t2 and a third temperature threshold t3 according to the operating conditions of the air conditioner, wherein t1 is more than t2 and more than t 3;
when the air conditioner runs, detecting the exhaust temperature of a compressor of the air conditioner, when the exhaust temperature of the compressor reaches an exhaust protection temperature point, starting exhaust protection by the air conditioner, recording the exhaust temperature of the compressor at the moment, starting frequency reduction operation of the compressor of the air conditioner, recording the exhaust temperature of the compressor for multiple times according to a set recording period T, and after recording the exhaust temperature of the compressor each time, correcting the frequency of the compressor by using a compressor frequency correction method until the air conditioner stops exhaust protection;
the frequency correction method of the compressor comprises the following steps: calculating the temperature difference delta TD between the compressor exhaust temperature recorded this time and the compressor exhaust temperature recorded last time, comparing the temperature difference delta TD with the first temperature threshold t1, the second temperature threshold t2 and the third temperature threshold t3, adjusting the frequency of the compressor according to the comparison result, if the temperature difference delta TD is not more than t1, keeping the current frequency reduction speed of the compressor to continue frequency reduction, if the temperature difference delta TD is more than t1 and not more than t2, reducing the frequency reduction speed of the compressor to continue frequency reduction, and if the temperature difference delta TD is more than t2 and not more than t3, stopping frequency reduction of the compressor and keeping the current frequency running.
2. The control method for preventing an air conditioner from repeatedly performing exhaust protection according to claim 1, wherein: if the delta TD is more than t1 and less than or equal to t2, the frequency reduction speed of the compressor is reduced by 50 percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011517978.7A CN112611089B (en) | 2020-12-21 | 2020-12-21 | Control method for preventing air conditioner from repeatedly exhausting protection |
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| CN202011517978.7A CN112611089B (en) | 2020-12-21 | 2020-12-21 | Control method for preventing air conditioner from repeatedly exhausting protection |
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| CN112611089A true CN112611089A (en) | 2021-04-06 |
| CN112611089B CN112611089B (en) | 2022-05-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639453A (en) * | 2021-08-13 | 2021-11-12 | 青岛海尔空调器有限总公司 | Method and device for controlling frequency stability of air conditioner compressor and electronic equipment |
| CN113701304A (en) * | 2021-07-27 | 2021-11-26 | 宁波奥克斯电气股份有限公司 | Control method and device of air conditioner and air conditioner |
| CN114543305A (en) * | 2022-01-28 | 2022-05-27 | 青岛海尔空调器有限总公司 | Control method and control device of air conditioner and air conditioner |
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| KR20090132164A (en) * | 2008-06-20 | 2009-12-30 | 주식회사 신화벤틸레이션 | Device protection system of ventilation system |
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2020
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Patent Citations (5)
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| KR20090132164A (en) * | 2008-06-20 | 2009-12-30 | 주식회사 신화벤틸레이션 | Device protection system of ventilation system |
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| CN107940694A (en) * | 2017-11-16 | 2018-04-20 | 珠海格力电器股份有限公司 | The exhaust protection control method and system of a kind of air conditioner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113639453A (en) * | 2021-08-13 | 2021-11-12 | 青岛海尔空调器有限总公司 | Method and device for controlling frequency stability of air conditioner compressor and electronic equipment |
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| CN114543305B (en) * | 2022-01-28 | 2023-11-17 | 青岛海尔空调器有限总公司 | Air conditioner control method and device and air conditioner |
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| CN112611089B (en) | 2022-05-20 |
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