CN105042768A - Control method for preventing indoor heat exchanger from frosting when frequency conversion air conditioner operates in refrigerating mode - Google Patents
Control method for preventing indoor heat exchanger from frosting when frequency conversion air conditioner operates in refrigerating mode Download PDFInfo
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- CN105042768A CN105042768A CN201510378720.6A CN201510378720A CN105042768A CN 105042768 A CN105042768 A CN 105042768A CN 201510378720 A CN201510378720 A CN 201510378720A CN 105042768 A CN105042768 A CN 105042768A
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- frequency
- heat exchanger
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- indoor heat
- changeable compressor
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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
-
- 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
- F24F11/43—Defrosting; Preventing freezing of indoor units
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method for preventing an indoor heat exchanger from frosting when a frequency conversion air conditioner operates in a refrigerating mode. The control method includes the steps that the coil pipe temperature Tm of the indoor heat exchanger is detected to serve as a judgment basis in the refrigerating process; a compressor starts in the normal state, and the frequency of the frequency conversion compressor rises slowly at the speed of 10 s/Hz to 15 s/Hz when the Tm drops to 8 DEG C to 9 DEG C; when the Tm drops to 3 DEG C to 5 DEG C, the compressor is kept to operate stably at the current frequency; when absorbed heat is slightly insufficient, the Tm drops to 1 DEG C to 2 DEG C, the frequency of the frequency conversion compressor is lowered slowly at the speed of 5 s/Hz to 10 s/Hz and does not stop being lowered until the Tm rises to 5 DEG C to 6 DEG C again, and then the compressor is kept to operate stably at the current frequency; when the absorbed heat is seriously not enough, and the Tm drops to be -1 DEG C to -2 DEG C, the frequency conversion compressor stops working. By means of the method, the temperature fluctuation of a room can be lowered.
Description
Technical field
The present invention relates to convertible frequency air-conditioner field, when being specifically a kind of inverter air conditioner refrigerating operaton, prevent the control method of indoor heat exchanger frosting.
Background technology
Inverter air conditioner is in process of refrigerastion, if there is situation with the heat exchange of indoor environment, suddenly indoor fan be transferred to low wind shelves from high wind shelves as user or suddenly the room of windowing closed the reasons such as the air inlet blocking of window or indoor set, can cause air-conditioning recept the caloric indoor suddenly reduce, heat exchange quantity not sufficient, and the output frequency reaction of compressor not in time, the coil temperature of indoor heat exchanger will be caused to decline rapidly, now, if air humidity is comparatively large, the just as easy as rolling off a log coil pipe frosting at indoor heat exchanger.Once frost layer accumulation, indoor heat exchanger and room air heat exchanger channels will be blocked further, reduce heat transfer effect further.So, in process of refrigerastion, prevent the technology of frosting very important.
And the specific aim measure that prior art is taked is roughly fairly simple, once find that the coil temperature of indoor heat exchanger is too low, just directly shut down or to compressor significantly frequency reducing, like this, room temperature certainly will be made to produce larger fluctuation, make people very uncomfortable.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of and prevents the control method of indoor heat exchanger frosting when can reduce the inverter air conditioner refrigerating operaton of room temperature fluctuation.
Technical solution of the present invention is, provides the control method preventing indoor heat exchanger frosting during a kind of inverter air conditioner refrigerating operaton, and its concrete steps are as follows:
In refrigerating operaton, detect the coil temperature Tm of indoor heat exchanger in real time as the foundation judged;
Control procedure under normal condition is after frequency-changeable compressor starting up, and Tm can decline gradually, and when Tm drops between 8 ~ 9 DEG C, frequency-changeable compressor is with the slow raising frequency of the speed of 10 ~ 15s/Hz; Now Tm can continue to decline, and when Tm drops between 3 ~ 5 DEG C, current frequency-changeable compressor running frequency is defined as highest frequency, keeps highest frequency stable operation, makes Tm also in the optimum temperature range between 3 ~ 5 DEG C steady in a long-term;
When the heat exchange situation of indoor heat exchanger change cause recepting the caloric slight not enough time, Tm can continue to decline after reaching the optimum temperature range between 3 ~ 5 DEG C, when Tm drops between 1 ~ 2 DEG C, frequency-changeable compressor is with the slow frequency reducing of the speed of 5 ~ 10s/Hz, until stop frequency reducing when Tm goes back up to 5 ~ 6 DEG C again, then keep ongoing frequency stable operation now;
When the heat exchange situation of indoor heat exchanger occurs extremely to cause caloric receptivity wretched insufficiency, Tm can decline rapidly, when Tm drops between-1 ~-2 DEG C, and frequency-changeable compressor shutdown; When Tm goes back up to after within the scope of 7 ~ 9 DEG C after shutdown, recover the raising frequency at a slow speed under normal condition, if when frequency-changeable compressor occurs that Tm drops between-1 ~-2 DEG C after resuming operation again, then shut down report fault.
This controlling party ratio juris is as follows.
After normal startup frequency-changeable compressor, with the slow raising frequency of the speed of 10 ~ 15s/Hz, prevent too fast raising frequency from causing Tm temperature too low and frosting; And when Tm drops in the optimum temperature range between 3 ~ 5 DEG C, frequency-changeable compressor keeps current optimum operation frequency, makes the coil temperature of indoor set both can not too low and frosting, again can not be too high and reduce heat transfer effect, make room temperature balanced, avoid fluctuation.
When indoor heat exchange situation changes, as user suddenly the wind shelves of indoor fan are turned down or user close window cause indoor heat exchange load to reduce or a series of situation such as air inlet Partial Blocking of indoor set cause indoor heat exchanger absorb heat slight not enough time, for this situation with the slow frequency reducing of the speed of 5 ~ 10s/Hz, reduce and frosting further to prevent the coil temperature of indoor heat exchanger, the too fast refrigeration that causes of frequency reducing can be avoided again obviously to weaken simultaneously, effectively avoid room temperature to fluctuate.After the temperature range between Tm is warmed up to again a little more than 3 ~ 5 DEG C is as 5 ~ 6 DEG C, stops frequency reducing, prevent refrigeration from significantly weakening.Meanwhile, be also consider that the heat transfer effect of indoor heat exchanger occurs situation, therefore coil temperature Tm be stabilized in the scope operation slightly higher than ideal range, avoid frosting.
When indoor heat exchange situation occurs abnormal, after indoor fan fault or air inlet block completely, during indoor heat exchanger heat absorption wretched insufficiency, the coil temperature of indoor heat exchanger can significantly reduce and frosting, now resolute in compressor shutdown, again start shooting again after the coil temperature of indoor heat exchanger progressively rises, and carry out raising frequency at a slow speed according to the situation of normal boot-strap, Tm is declined again, and attempt Tm to return in the optimum temperature range between 3 ~ 5 DEG C, if but still occur that Tm drops to the situation of-1 ~-2 DEG C, then determine that great exception appears in heat exchange, as indoor fan fault or air inlet block completely, then shut down report fault.
Adopt above method, the control method preventing indoor heat exchanger frosting during inverter air conditioner refrigerating operaton of the present invention compared with prior art, has the following advantages:
From analyzing above, this control method as much as possible can ensure that the room temperature under refrigeration mode is stablized, and reduces even to avoid room temperature to fluctuate, avoids frosting, make user feel comfortable.
Detailed description of the invention
Prevent the control method of indoor heat exchanger frosting during inverter air conditioner refrigerating operaton of the present invention, its concrete steps are as follows.
In refrigerating operaton, detect the coil temperature Tm of indoor heat exchanger in real time as the foundation judged.
Control procedure under normal condition is after frequency-changeable compressor starting up, and Tm can decline gradually, when Tm drops between 8 ~ 9 DEG C, as dropped to 8.5 DEG C, frequency-changeable compressor with the slow raising frequency of the speed of 10 ~ 15s/Hz, as with the speed raising frequency of 12 seconds rising 1Hz; Now Tm can continue to decline, when Tm drops between 3 ~ 5 DEG C, as Tm be 4 DEG C time, current frequency-changeable compressor running frequency is defined as highest frequency, keep highest frequency stable operation, make Tm also in the optimum temperature range between 3 ~ 5 DEG C steady in a long-term.
When the heat exchange situation of indoor heat exchanger change cause recepting the caloric slight not enough time, Tm can continue to decline after reaching the optimum temperature range between 3 ~ 5 DEG C, when Tm drops between 1 ~ 2 DEG C, as Tm be 1.5 DEG C time, frequency-changeable compressor is with the slow frequency reducing of the speed of 5 ~ 10s/Hz as 7s/Hz, until Tm goes back up to 5 ~ 6 DEG C again as stopped frequency reducing when 5.2 DEG C, then keep ongoing frequency stable operation now.
When the heat exchange situation of indoor heat exchanger occurs extremely to cause caloric receptivity wretched insufficiency, Tm can decline rapidly, when Tm drops between-1 to-2 DEG C, and frequency-changeable compressor shutdown.When Tm goes back up to after within the scope of 7 ~ 9 DEG C after shutdown; recover the raising frequency at a slow speed under normal condition; namely frequency-changeable compressor is with the slow raising frequency of the speed of 10 ~ 15s/Hz, if when frequency-changeable compressor occurs that Tm drops between-1 ~-2 DEG C after resuming operation again, then shuts down report fault.
Claims (1)
1. prevent a control method for indoor heat exchanger frosting during inverter air conditioner refrigerating operaton, it is characterized in that: its step is as follows:
In refrigerating operaton, detect the coil temperature Tm of indoor heat exchanger in real time as the foundation judged;
Control procedure under normal condition is after frequency-changeable compressor starting up, and Tm can decline gradually, and when Tm drops between 8 ~ 9 DEG C, frequency-changeable compressor is with the slow raising frequency of the speed of 10 ~ 15s/Hz; Now Tm can continue to decline, and when Tm drops between 3 ~ 5 DEG C, current frequency-changeable compressor running frequency is defined as highest frequency, keeps highest frequency stable operation, makes Tm also in the optimum temperature range between 3 ~ 5 DEG C steady in a long-term;
When the heat exchange situation of indoor heat exchanger change cause recepting the caloric slight not enough time, Tm can continue to decline after reaching the optimum temperature range between 3 ~ 5 DEG C, when Tm drops between 1 ~ 2 DEG C, frequency-changeable compressor is with the slow frequency reducing of the speed of 5 ~ 10s/Hz, until stop frequency reducing when Tm goes back up to 5 ~ 6 DEG C again, then keep ongoing frequency stable operation now;
When the heat exchange situation of indoor heat exchanger occurs extremely to cause caloric receptivity wretched insufficiency, Tm can decline rapidly, when Tm drops between-1 ~-2 DEG C, and frequency-changeable compressor shutdown; When Tm goes back up to after within the scope of 7 ~ 9 DEG C after shutdown, recover the raising frequency at a slow speed under normal condition, if when frequency-changeable compressor occurs that Tm drops between-1 ~-2 DEG C after resuming operation again, then shut down report fault.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510378720.6A CN105042768B (en) | 2015-06-29 | 2015-06-29 | The control method of indoor heat exchanger frosting is prevented during inverter air conditioner refrigerating operaton |
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| CN201510378720.6A CN105042768B (en) | 2015-06-29 | 2015-06-29 | The control method of indoor heat exchanger frosting is prevented during inverter air conditioner refrigerating operaton |
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| CN105042768A true CN105042768A (en) | 2015-11-11 |
| CN105042768B CN105042768B (en) | 2018-03-20 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106123287A (en) * | 2016-06-30 | 2016-11-16 | 青岛海尔空调器有限总公司 | A kind of air-conditioner and control method thereof |
| CN107525234A (en) * | 2017-08-17 | 2017-12-29 | 青岛海尔空调器有限总公司 | A kind of method and device of compressor of air conditioner frequency conversion protection |
| CN109210698A (en) * | 2018-09-10 | 2019-01-15 | 青岛海尔空调器有限总公司 | A kind of control method of air-conditioning freeze protection |
| CN109945430A (en) * | 2019-03-13 | 2019-06-28 | 珠海格力电器股份有限公司 | Seat loop wheel machine operation means of defence, device, system and seat loop wheel machine |
| CN110513826A (en) * | 2019-09-10 | 2019-11-29 | 宁波奥克斯电气股份有限公司 | A kind of air conditioner and its control method |
| CN111780361A (en) * | 2020-06-30 | 2020-10-16 | 海信（山东）空调有限公司 | Air conditioner |
| CN112577155A (en) * | 2019-09-27 | 2021-03-30 | 广东美的制冷设备有限公司 | Control method of air conditioner, air conditioner and computer readable storage medium |
| CN113068546A (en) * | 2021-03-31 | 2021-07-06 | 广东积微科技有限公司 | Air conditioner control method for greenhouse low-temperature refrigeration |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106123287A (en) * | 2016-06-30 | 2016-11-16 | 青岛海尔空调器有限总公司 | A kind of air-conditioner and control method thereof |
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| CN109945430B (en) * | 2019-03-13 | 2020-08-07 | 珠海格力电器股份有限公司 | Operation protection method, device and system for base crane and base crane |
| CN110513826A (en) * | 2019-09-10 | 2019-11-29 | 宁波奥克斯电气股份有限公司 | A kind of air conditioner and its control method |
| CN110513826B (en) * | 2019-09-10 | 2021-09-21 | 宁波奥克斯电气股份有限公司 | Air conditioner and control method thereof |
| CN112577155A (en) * | 2019-09-27 | 2021-03-30 | 广东美的制冷设备有限公司 | Control method of air conditioner, air conditioner and computer readable storage medium |
| CN111780361A (en) * | 2020-06-30 | 2020-10-16 | 海信（山东）空调有限公司 | Air conditioner |
| CN111780361B (en) * | 2020-06-30 | 2021-12-03 | 海信（山东）空调有限公司 | Air conditioner |
| CN113068546A (en) * | 2021-03-31 | 2021-07-06 | 广东积微科技有限公司 | Air conditioner control method for greenhouse low-temperature refrigeration |
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| CN105042768B (en) | 2018-03-20 |
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Address after: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Applicant after: NINGBO AUX ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Applicant before: Ningbo AUX Electric Co., Ltd. |
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Effective date of registration: 20191225 Address after: 243100 No. 1166, oaks Avenue, Dangtu Economic Development Zone, Ma'anshan City, Anhui Province Patentee after: Anhui Ox Intelligent Electric Co., Ltd. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee before: NINGBO AUX ELECTRIC CO., LTD. |
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