CN112556094A - Air conditioner defrosting control method - Google Patents
Air conditioner defrosting control method Download PDFInfo
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- CN112556094A CN112556094A CN202011414638.1A CN202011414638A CN112556094A CN 112556094 A CN112556094 A CN 112556094A CN 202011414638 A CN202011414638 A CN 202011414638A CN 112556094 A CN112556094 A CN 112556094A
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- Prior art keywords
- temperature
- defrosting
- air conditioner
- preset
- time
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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
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the field of air conditioner defrosting, in particular to an air conditioner defrosting control method, which can save energy while realizing cleaner defrosting, ensure the heating effect of an air conditioner, avoid frequent reversing of a four-way valve and improve the reliability and stability of a system. The technical scheme is summarized as follows: the defrosting method comprises the steps of detecting and judging defrosting time, comparing the temperature of an air conditioner liquid pipe with the temperature of a coil of an air conditioner outdoor unit if the defrosting time is longer than first preset defrosting time, comparing the temperature of the air conditioner liquid pipe with preset defrosting temperature if the temperature of the air conditioner liquid pipe is smaller than the temperature of the coil of the air conditioner outdoor unit, exiting the defrosting mode if the temperature of the air conditioner liquid pipe is larger than or equal to the preset defrosting temperature, and exiting the defrosting mode if the defrosting time is larger than or equal to second preset defrosting time and the second preset defrosting time is larger than the first preset defrosting time. The invention is suitable for defrosting control of the air conditioner.
Description
Technical Field
The invention relates to the field of air conditioner defrosting, in particular to an air conditioner defrosting control method.
Background
When the air conditioner heats, the refrigerant passes through the compressor, the evaporator and the condenser in sequence. The condenser is in a low-temperature state for a long time and is easy to frost. When frosting reaches certain thickness, then can influence the heat exchange efficiency of condenser, lead to the holistic heating capacity of air conditioner to descend, influence the user and use experience.
After the existing air conditioner heats for a period of time, the defrosting condition is judged to be a defrosting mode, namely, the four-way valve is reversed, the air conditioner starts to refrigerate, the outdoor heat exchanger is defrosted by a method of increasing the temperature of the outdoor heat exchanger, and whether defrosting is finished or not is judged by the temperature of an outdoor coil sensor.
Because the air conditioner runs for a long time, the pressures of outdoor coils corresponding to different outdoor environments are different, and the refrigerant distribution of the outdoor unit heat exchanger is changed along with the pressure, the temperature of the outdoor unit coil sensor cannot represent the temperature of the whole outdoor unit coil. If only the temperature of the coil of the outdoor unit (usually measured by a temperature sensor on a small U-shaped pipe in the middle of the outdoor unit) is used as a determination condition, the defrosting is not clean, and the defrosting ending condition is controlled by the temperature of the coil rising to a certain temperature.
Disclosure of Invention
The invention aims to provide an air conditioner defrosting control method, which can save energy while realizing cleaner defrosting, ensure the heating effect of an air conditioner, avoid frequent reversing of a four-way valve and improve the reliability and stability of a system.
The invention adopts the following technical scheme to realize the aim, and the defrosting control method of the air conditioner comprises the following steps:
step (1), detecting and judging the defrosting time, and entering step (2) if the defrosting time is greater than a first preset defrosting time;
step (2), comparing the temperature of the air conditioner liquid pipe with the temperature of a coil of the air conditioner outdoor unit, and entering step (3) if the temperature of the air conditioner liquid pipe is lower than the temperature of the coil of the air conditioner outdoor unit; otherwise, entering the step (4);
step (3), comparing the temperature of the air conditioner liquid pipe with a preset defrosting temperature, if the temperature of the air conditioner liquid pipe is more than or equal to the preset defrosting temperature, exiting the defrosting mode, and otherwise entering the step (5);
step (4), comparing the temperature of the coil of the air-conditioning outdoor unit with a preset defrosting temperature, if the temperature of the coil of the air-conditioning outdoor unit is more than or equal to the preset defrosting temperature, exiting the defrosting mode, and otherwise entering the step (5);
and (5) if the defrosting time is more than or equal to a second preset defrosting time, and the second preset defrosting time is more than the first preset defrosting time, exiting the defrosting mode.
Further, in the step (1), the first preset defrosting time is 2 minutes.
Further, in the step (3), the method for obtaining the preset defrosting temperature includes: do the experiment of heating under the indoor outer operating mode of difference, then wait for the off-premises station heat exchanger frosting after, manual falls the cross valve and falls the power supply, when observing the frost except clean, records liquid pipe temperature and outer dish temperature this moment, regards minimum in the two as presetting the defrosting temperature.
Further, the preset defrosting temperature is 15 ℃.
The invention introduces the temperature of the air conditioner liquid pipe to make up the defect that the temperature of the coil pipe of the air conditioner outdoor unit is only used as the defrosting ending control condition, and compares the minimum temperature value of the temperature of the air conditioner liquid pipe and the temperature of the coil pipe of the air conditioner outdoor unit with the preset defrosting temperature, wherein the preset defrosting temperature is the defrosting critical temperature obtained through a large amount of experimental data, and if the minimum temperature value is more than or equal to the preset defrosting temperature, the defrosting is completely finished; in addition, other judgment conditions are added, and if the temperature of the liquid pipe of the air conditioner or the minimum temperature value of the temperature of the coil of the outdoor unit of the air conditioner is not brought to the preset defrosting temperature, the defrosting time is prolonged to defrost; the defrosting is cleaner, energy can be saved, the heating effect of the air conditioner is guaranteed, the reliability and the stability of the system are improved, and frequent reversing of the four-way valve is avoided only by software processing.
Drawings
Fig. 1 is a flow chart of a method of controlling defrosting of an air conditioner according to the present invention.
Detailed Description
The invention relates to an air conditioner defrosting control method, the flow chart of which is shown in figure 1, comprising the following steps:
and 104, comparing the temperature of the coil of the air-conditioning outdoor unit with a preset defrosting temperature, if the temperature of the coil of the air-conditioning outdoor unit is more than or equal to the preset defrosting temperature, exiting the defrosting mode, and otherwise, entering the step 105.
In step 101, in order to prevent the temperature misjudgment, the first preset defrosting time is 2 minutes, and may be set as needed.
In step 103 or 104, the method for obtaining the preset defrosting temperature includes: heating experiments are carried out under different indoor and outdoor working conditions, then after an outdoor unit heat exchanger frosts, the four-way valve is manually powered off, when frost is observed to be removed completely, the temperature of a liquid pipe and the temperature of an outer disc at the moment are recorded, and the minimum value of the two is used as a preset defrosting temperature; to improve the accuracy of the preset defrost temperature, a number of the above tests may also be repeated, averaging all the minima.
Wherein the optimum preset defrost temperature is 15 deg.c.
According to experiments, the effect is optimal under the conditions that the first preset defrosting time is 2 minutes and the preset defrosting temperature is 15 ℃.
The invention can finish defrosting in a short time, and can enter a heating mode more quickly after defrosting is finished, thereby providing the best experience for users; because the temperature of the coil pipe of the outdoor unit and the temperature of the liquid pipe of the outdoor unit (namely, the supercooling temperature) are judged at the same time, the minimum temperature is ensured to ensure that the defrosting is finished at the moment, and the minimum temperature ensures that the defrosting is clean and uniform, the heating is carried out at the moment, so that the heating time can be ensured to be longer than the running time when the frost is not completely removed, and the vicious circle when the frost is not completely removed can not be caused; if there is a failure in both the sensor of the coil of the outdoor unit and the sensor of the temperature (supercooling temperature) of the liquid pipe of the outdoor unit, it is also possible to determine that defrosting is finished according to the sensor where there is no damage, so that the control method ensures the reliability of long-term operation; and the invention is implemented only by software, thus avoiding frequent reversing of the four-way valve.
In conclusion, the invention can save energy while realizing cleaner defrosting, ensure the heating effect of the air conditioner, avoid frequent reversing of the four-way valve and improve the reliability and stability of the system.
Claims (4)
1. The defrosting control method of the air conditioner is characterized by comprising the following steps:
step (1), detecting and judging the defrosting time, and entering step (2) if the defrosting time is greater than a first preset defrosting time;
step (2), comparing the temperature of the air conditioner liquid pipe with the temperature of a coil of the air conditioner outdoor unit, and entering step (3) if the temperature of the air conditioner liquid pipe is lower than the temperature of the coil of the air conditioner outdoor unit; otherwise, entering the step (4);
step (3), comparing the temperature of the air conditioner liquid pipe with a preset defrosting temperature, if the temperature of the air conditioner liquid pipe is more than or equal to the preset defrosting temperature, exiting the defrosting mode, and otherwise entering the step (5);
step (4), comparing the temperature of the coil of the air-conditioning outdoor unit with a preset defrosting temperature, if the temperature of the coil of the air-conditioning outdoor unit is more than or equal to the preset defrosting temperature, exiting the defrosting mode, and otherwise entering the step (5);
and (5) if the defrosting time is more than or equal to a second preset defrosting time, and the second preset defrosting time is more than the first preset defrosting time, exiting the defrosting mode.
2. The air conditioner defrost control method of claim 1, wherein in the step (1), the first preset defrost time is 2 minutes.
3. The air conditioner defrosting control method according to claim 1 or 2, wherein in the step (3), the preset defrosting temperature obtaining method includes: do the experiment of heating under the indoor outer operating mode of difference, then wait for the off-premises station heat exchanger frosting after, manual falls the cross valve and falls the power supply, when observing the frost and remove clean, records liquid pipe temperature and outer dish temperature this moment, regards minimum in the two as presetting the defrosting temperature.
4. The air conditioner defrost control method of claim 3, wherein the preset defrost temperature is 15 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011414638.1A CN112556094A (en) | 2020-12-04 | 2020-12-04 | Air conditioner defrosting control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011414638.1A CN112556094A (en) | 2020-12-04 | 2020-12-04 | Air conditioner defrosting control method |
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| CN112556094A true CN112556094A (en) | 2021-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011414638.1A Pending CN112556094A (en) | 2020-12-04 | 2020-12-04 | Air conditioner defrosting control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909777A (en) * | 2022-05-31 | 2022-08-16 | 北京小米移动软件有限公司 | Defrosting control method and device for air conditioner, terminal and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6012294A (en) * | 1997-12-18 | 2000-01-11 | Fujitsu General Limited | Air conditioner control method and apparatus of the same |
| CN106152381A (en) * | 2015-03-31 | 2016-11-23 | Tcl空调器(中山)有限公司 | Air-conditioner and the defrosting control method of air-conditioner |
| CN108954677A (en) * | 2018-07-23 | 2018-12-07 | 广东美的暖通设备有限公司 | Defrosting control method, defrosting control system and the storage medium of multi-line system |
| CN110470006A (en) * | 2019-08-02 | 2019-11-19 | 青岛海尔空调器有限总公司 | Control method and device, air-conditioning for air-conditioner defrosting |
| CN111503925A (en) * | 2020-04-30 | 2020-08-07 | 中车青岛四方车辆研究所有限公司 | Air conditioner and defrosting method thereof |
-
2020
- 2020-12-04 CN CN202011414638.1A patent/CN112556094A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6012294A (en) * | 1997-12-18 | 2000-01-11 | Fujitsu General Limited | Air conditioner control method and apparatus of the same |
| CN106152381A (en) * | 2015-03-31 | 2016-11-23 | Tcl空调器(中山)有限公司 | Air-conditioner and the defrosting control method of air-conditioner |
| CN108954677A (en) * | 2018-07-23 | 2018-12-07 | 广东美的暖通设备有限公司 | Defrosting control method, defrosting control system and the storage medium of multi-line system |
| CN110470006A (en) * | 2019-08-02 | 2019-11-19 | 青岛海尔空调器有限总公司 | Control method and device, air-conditioning for air-conditioner defrosting |
| CN111503925A (en) * | 2020-04-30 | 2020-08-07 | 中车青岛四方车辆研究所有限公司 | Air conditioner and defrosting method thereof |
Non-Patent Citations (1)
| Title |
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| 杨来英: "《家电维修2003年合计本(下)》", 31 January 2004, 《家电维修》杂志社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909777A (en) * | 2022-05-31 | 2022-08-16 | 北京小米移动软件有限公司 | Defrosting control method and device for air conditioner, terminal and storage medium |
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