CN108692423B - Defrosting control method for air conditioner - Google Patents
Defrosting control method for air conditioner Download PDFInfo
- Publication number
- CN108692423B CN108692423B CN201810509449.9A CN201810509449A CN108692423B CN 108692423 B CN108692423 B CN 108692423B CN 201810509449 A CN201810509449 A CN 201810509449A CN 108692423 B CN108692423 B CN 108692423B
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- China
- Prior art keywords
- air conditioner
- defrosting
- environment temperature
- indoor
- outdoor
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- 238000010257 thawing Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
Images
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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
-
- 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
-
- 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
-
- 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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner. In order to prevent the overlarge fluctuation of the room temperature during defrosting, the defrosting control method of the air conditioner provided by the invention comprises the following steps: judging whether the air conditioner meets a defrosting condition or not in the process of heating operation of the air conditioner; if yes, acquiring the indoor environment temperature and the outdoor environment temperature before the air conditioner enters the defrosting mode; and comparing the indoor environment temperature with the outdoor environment temperature, and selectively controlling the running frequency of the compressor, the opening of the throttle valve or the fan rotating speed of the indoor unit and/or the outdoor unit according to the comparison result. The invention selectively controls the running frequency of the compressor, the opening degree of the throttle valve or the rotating speed of the fan of the indoor unit and/or the outdoor unit to store a part of energy based on the difference value of the indoor environment temperature and the outdoor environment temperature, and the part of energy is supplemented to the indoor unit in the defrosting process of the air conditioner, thereby effectively preventing the room temperature from fluctuating too much in the defrosting process.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner.
Background
The air conditioner as a device capable of adjusting the indoor environment temperature has the working principle that: the indoor environment temperature is lowered or raised by the refrigerant switching between the circulation lines through the high pressure/low pressure/gas/liquid state, namely, the air conditioner is in the cooling or heating working condition from the perspective of the indoor unit. When the air conditioner heats the operation, if outdoor coil pipe temperature under certain humidity condition crosses lowly can lead to the condition of frosting, and outdoor coil pipe frosting can lead to outdoor heat exchanger's heat exchange efficiency to reduce, influences the heating effect of air conditioner, reduces indoor environment's travelling comfort, influences user experience. Therefore, in the situation that the air conditioner is in the heating working condition, the outdoor coil of the air conditioner needs to be defrosted timely and effectively.
In the operation and heating process of the existing household air conditioner, whether the air conditioner is in a frosting state can be judged in various modes, for example, the operation time and the temperature of an outdoor coil pipe are used for judging whether defrosting is started or not. When the air conditioner is judged to be in a frosting state, the air conditioner is enabled to enter a defrosting mode, however, the mode easily causes large fluctuation of indoor temperature.
Therefore, the invention provides a new defrosting control method to reduce the influence on the indoor temperature in the defrosting process.
Disclosure of Invention
In order to solve the above problems in the prior art and to prevent the room temperature from fluctuating too much during defrosting, the invention provides a defrosting control method of an air conditioner, which comprises the following steps: judging whether the air conditioner meets a defrosting condition or not in the process of heating operation of the air conditioner; if yes, acquiring the indoor environment temperature and the outdoor environment temperature before the air conditioner enters the defrosting mode; and comparing the indoor environment temperature with the outdoor environment temperature, and selectively controlling the running frequency of the compressor, the opening of the throttle valve or the fan rotating speed of the indoor unit and/or the outdoor unit according to the comparison result.
In a preferred embodiment of the above-described air conditioner defrost control method, the step of comparing the indoor ambient temperature and the outdoor ambient temperature and selectively controlling the operation frequency of the compressor, the opening degree of the throttle valve, or the rotation speed of the fan of the indoor unit and/or the outdoor unit according to the comparison result includes: calculating the difference dn as the indoor environment temperature-the outdoor environment temperature; if dn is more than or equal to the set value, the running frequency of the compressor is increased; if dn < the set value, the operation frequency of the compressor is maintained unchanged, the opening degree of the throttle valve is reduced, and/or the rotating speed of the fan of the indoor unit and/or the outdoor unit is reduced.
In the preferred embodiment of the defrosting control method of the air conditioner, if dn is more than or equal to the set value, the running frequency of the compressor is increased by 10 to 15 hz.
In a preferred embodiment of the above-described air conditioner defrost control method, if dn < the set value, the throttle opening is decreased by 20-40 steps.
In a preferred embodiment of the above-described air conditioner defrost control method, if dn < a set value, the fan rotation speed of the indoor and/or outdoor unit is reduced by 40-60 rpm.
In a preferred embodiment of the above-described air conditioner defrost control method, if dn < a set value, the fan rotation speed of the indoor and/or outdoor unit is reduced by 50 rpm.
In a preferred embodiment of the above-mentioned defrosting control method of an air conditioner, the set value is an arbitrary value between 9 and 11.
In a preferred embodiment of the above-described defrosting control method of an air conditioner, the set value is 10.
According to the technical scheme, before the air conditioner enters the defrosting mode, the running frequency and the opening degree of the throttle valve of the compressor or the rotating speed of the fan of the indoor unit and/or the outdoor unit are selectively controlled based on the difference value of the indoor environment temperature and the outdoor environment temperature to store a part of energy, and the part of energy is supplemented to the indoor unit in the defrosting process of the air conditioner, so that the overlarge fluctuation of the room temperature during defrosting is effectively prevented. It can be understood by those skilled in the art that the difference between the preset temperature and the indoor ambient temperature is used as a reference value, and the corresponding energy storage mode can be accurately selected, so that the fluctuation of the room temperature during defrosting can be minimized.
Drawings
Fig. 1 is a schematic main flow chart of an air conditioner defrosting control method according to the present invention.
Detailed Description
In order to make the embodiments, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the embodiments are some, but not all embodiments of the present invention. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
As shown in fig. 1, the defrost control method of the present invention comprises the steps of: s110, judging whether the air conditioner meets a defrosting condition or not in the heating operation process of the air conditioner; s120, if yes, acquiring the indoor environment temperature and the outdoor environment temperature before the air conditioner enters the defrosting mode; and S130, comparing the indoor environment temperature with the outdoor environment temperature, and selectively controlling the running frequency of the compressor, the opening degree of the throttle valve or the fan rotating speed of the indoor unit and/or the outdoor unit according to the comparison result. Through steps S110 to S130, the operating frequency of the compressor, the opening of the throttle valve, or the rotational speed of the fan of the indoor unit and/or the outdoor unit is selectively controlled based on the indoor ambient temperature and the outdoor ambient temperature, so that a part of energy is stored before the air conditioner performs defrosting.
In step S110, when determining whether the air conditioner satisfies the defrosting condition, a person skilled in the art may select any known determination method, and the present invention does not limit the specific defrosting condition.
In step S130, the difference dn is calculated as the indoor ambient temperature — outdoor ambient temperature; if dn is more than or equal to the set value, the running frequency of the compressor is increased; if dn < the set value, the operation frequency of the compressor is maintained unchanged, the opening degree of the throttle valve is reduced, and/or the rotating speed of the fan of the indoor unit and/or the outdoor unit is reduced. The set value may be any value between 9 and 11, and in this embodiment, the set value is 10.
As an example, when dn ≧ 10, the operating frequency of the compressor is raised by 10-15 hz. As will be understood by those skilled in the art, during the defrosting process of the air conditioner, the heating capacity of the room is reduced, and if a part of energy is stored in the compressor after the frequency of the compressor is increased before the defrosting process is performed, the part of energy is replenished into the room during the defrosting process of the air conditioner, thereby effectively preventing the temperature fluctuation of the room during the defrosting process from being too large.
As an example, when dn < 10, the throttle opening is decreased by 20-40 steps; or the rotating speed of the fan of the indoor unit and/or the outdoor unit is reduced by 40-60rpm, preferably by 50 rpm. In this way, a part of energy can be stored before entering into defrosting, and then the part of energy is replenished into the room during the defrosting process of the air conditioner, so that the excessive fluctuation of the room temperature during defrosting is effectively prevented.
In summary, according to the technical solution of the present invention, before the air conditioner enters the defrosting mode, the operating frequency of the compressor, the opening of the throttle valve, or the rotational speed of the fan of the indoor unit and/or the outdoor unit is selectively controlled based on the difference between the indoor ambient temperature and the outdoor ambient temperature to store a part of energy, and the part of energy is replenished into the room during the defrosting process of the air conditioner, so that the excessive fluctuation of the room temperature during defrosting is effectively prevented. It can be understood by those skilled in the art that the difference between the preset temperature and the indoor ambient temperature is used as a reference value, and the corresponding energy storage mode can be accurately selected, so that the fluctuation of the room temperature during defrosting can be minimized.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (1)
1. A defrosting control method of an air conditioner is characterized by comprising the following steps:
judging whether the air conditioner meets a defrosting condition or not in the process of heating operation of the air conditioner;
if yes, acquiring the indoor environment temperature and the outdoor environment temperature before the air conditioner enters the defrosting mode;
comparing the indoor environment temperature with the outdoor environment temperature, and selectively controlling the running frequency and the opening of a throttle valve of a compressor or the rotating speed of a fan of an indoor unit and/or an outdoor unit according to the comparison result;
wherein, calculating the difference dn is the indoor environment temperature-the outdoor environment temperature;
if dn is more than or equal to the set value, the running frequency of the compressor is increased;
if dn is less than the set value, the running frequency of the compressor is kept unchanged, the opening of the throttle valve is reduced, and/or the rotating speed of the fan of the indoor unit and/or the outdoor unit is reduced;
if dn is larger than or equal to a set value, the operating frequency of the compressor is increased by 10 to 15 hz;
wherein, if dn < set point, reduce the said throttle valve opening by 20-40 steps;
if dn is less than the set value, reducing the rotating speed of the fan of the indoor unit and/or the outdoor unit by 50 rpm;
wherein the set value is 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810509449.9A CN108692423B (en) | 2018-05-24 | 2018-05-24 | Defrosting control method for air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810509449.9A CN108692423B (en) | 2018-05-24 | 2018-05-24 | Defrosting control method for air conditioner |
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| CN108692423A CN108692423A (en) | 2018-10-23 |
| CN108692423B true CN108692423B (en) | 2021-01-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173824B (en) * | 2019-05-31 | 2021-05-18 | 广东美的制冷设备有限公司 | Operation control method, control device, air conditioner, and computer-readable storage medium |
| CN114076384A (en) * | 2020-08-20 | 2022-02-22 | 广东美的制冷设备有限公司 | Control method and system of air conditioning equipment, air conditioning equipment and storage medium |
| CN114484606B (en) * | 2022-02-17 | 2023-08-04 | 宁波奥克斯电气股份有限公司 | Fresh air conditioner, control method and device thereof and readable storage medium |
| CN114543253B (en) * | 2022-03-29 | 2023-09-01 | 宁波奥克斯电气股份有限公司 | Fresh air control method and device in refrigeration mode, air conditioner and readable storage medium |
| CN114562790B (en) * | 2022-03-29 | 2023-09-01 | 宁波奥克斯电气股份有限公司 | Heating mode fresh air control method and device, air conditioner and readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6410048A (en) * | 1987-06-30 | 1989-01-13 | Toshiba Corp | Control device of air conditioner |
| CN102449408A (en) * | 2009-05-29 | 2012-05-09 | 大金工业株式会社 | Air-conditioning device |
| CN102853502A (en) * | 2012-09-29 | 2013-01-02 | 广东美的制冷设备有限公司 | Defrosting control method of heat pump air conditioner unit |
| CN104236004A (en) * | 2013-06-19 | 2014-12-24 | 广东美的制冷设备有限公司 | Defrosting control method and device for heat pump system |
| CN104819542A (en) * | 2015-03-27 | 2015-08-05 | 广东美的制冷设备有限公司 | Defrosting control method and device of air conditioner and air conditioner |
| JP2017083143A (en) * | 2015-10-30 | 2017-05-18 | ダイキン工業株式会社 | Air conditioner |
-
2018
- 2018-05-24 CN CN201810509449.9A patent/CN108692423B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6410048A (en) * | 1987-06-30 | 1989-01-13 | Toshiba Corp | Control device of air conditioner |
| CN102449408A (en) * | 2009-05-29 | 2012-05-09 | 大金工业株式会社 | Air-conditioning device |
| CN102853502A (en) * | 2012-09-29 | 2013-01-02 | 广东美的制冷设备有限公司 | Defrosting control method of heat pump air conditioner unit |
| CN104236004A (en) * | 2013-06-19 | 2014-12-24 | 广东美的制冷设备有限公司 | Defrosting control method and device for heat pump system |
| CN104819542A (en) * | 2015-03-27 | 2015-08-05 | 广东美的制冷设备有限公司 | Defrosting control method and device of air conditioner and air conditioner |
| JP2017083143A (en) * | 2015-10-30 | 2017-05-18 | ダイキン工業株式会社 | Air conditioner |
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| CN108692423A (en) | 2018-10-23 |
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Effective date of registration: 20210113 Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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