CN102706054A - Defrosting method and method for air conditioning equipment, and air conditioning equipment - Google Patents
Defrosting method and method for air conditioning equipment, and air conditioning equipment Download PDFInfo
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- CN102706054A CN102706054A CN2012102051441A CN201210205144A CN102706054A CN 102706054 A CN102706054 A CN 102706054A CN 2012102051441 A CN2012102051441 A CN 2012102051441A CN 201210205144 A CN201210205144 A CN 201210205144A CN 102706054 A CN102706054 A CN 102706054A
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Abstract
The invention discloses a defrosting method and method for air conditioning equipment, and the air conditioning equipment. The method comprises the steps of acquiring the relative humidity at an air outlet of a condenser; if the relative humidity of the condenser is larger than a preset humidity threshold value, determining whether defrosting or not according to the temperature of an external coiler of the condenser; and defrosting under the condition that defrosting is determined to be performed. According to the invention, the relative humidity of the condenser is obtained and compared with the preset humidity threshold value to determine whether defrosting the air conditioning equipment or not, so that during the defrosting judgment, whether defrosting or not is determined by combination with the humidity, the defrosting judgment result is more accurate and objective, unnecessary defrosting resulting in unit heating energy efficiency ratio reduction is avoided, too little defrosting resulting in unit frosting and incapability of normal heat exchange and running can be also avoided, the poor heating effect of a compressor is effectively improved, and the problem of air conditioning equipment faults caused by frosting can be avoided.
Description
Technical field
The present invention relates to field of air conditioning, particularly, relate to a kind of Defrost method, device and air-conditioning equipment of air-conditioning equipment.
Background technology
The air-conditioning unit is in winter during heating operation, and when outside condenser surface temperature is lower than the dew-point temperature of surrounding air and is lower than 0 when spending, condenser surface will frosting.The heat-transfer effect of frosting post-condenser has deterioration, and heating effect descends, and unit can be out of service when serious.Therefore influence the subject matter that unit is used and developed during the heat exchanger frosting.In the practical application, air-conditioning unit environment of applications more complicated, the regional humidity that has is bigger; Some places humidity is less; Whether frosting is not only relevant with the gentle condenser coil of outer shroud for the air-conditioning unit, receives the influence of humidity to a great extent, and that is to say with dew-point temperature has direct relation.
Generally speaking, think that humidity will be along with reduction under the low situation of outer shroud temperature, so under the low situation of outer shroud temperature, judge that the coil temperature point of the condenser of frosting also reduces, the accumulated running time that defrosts is not carried out the judgement of damp condition along with lengthening yet.But in some coastal cities, the perhaps bigger place of relative humidity is under the low situation of outer shroud temperature; Humidity is also very big, judges that the coil temperature of defrosting should not reduce, and the press cumulative time should not extend yet; Otherwise just be easy to frosting, and influence the normal operation of unit.
At present each producer only adopts according to the defrost judgement of condition of the gentle condenser coil condition of outer shroud and three conditions of press accumulated running time.In some big many on-line systems, the outer machine of air-conditioning unit has two dial-ups that the defrosting alpha is set, and is provided with three coefficients; In the place of easy frosting, this dial-up of physical host of outer machine is selected the less numerical value of coefficient, in the place that is not easy frosting; Select the bigger dial-up of coefficient, under the general case, be set to the middle coefficient dial-up; But the traditional scheme dial-up setting that has been general carrying out, can there be very large deviation in the situation in real-world operation with perfect condition, cause defrosting too much, heating effect descends; Perhaps not enough, the frosting easily of defrosting influences unit and normally moves.
There is the problem of defective to the defrosting decision method of air-conditioning equipment in the correlation technique, do not propose effective solution at present as yet.
Summary of the invention
To air-conditioning equipment in the correlation technique in the coastal area or other humidity larger areas; Existing defrosting decision condition is easily to the not enough problem of defrosting condition criterion; The present invention proposes a kind of Defrost method, device and air-conditioning equipment of air-conditioning equipment; Can be through obtaining the relative humidity of compressor condenser, and with the predetermined moisture threshold, judge whether and need carry out defrost operation air-conditioning equipment.
Technical scheme of the present invention is achieved in that
According to an aspect of the present invention, a kind of Defrost method of air-conditioning equipment is provided, this Defrost method comprises:
Obtain the relative humidity at condenser air outlet place;
If the relative humidity of condenser is greater than the predetermined moisture threshold value, then the temperature according to the outer coil pipe of condenser determines whether that needs defrost;
Confirming to carry out defrost operation under the situation that need defrost.
Wherein, reach scheduled time length, and current time is under the appointment situation constantly that defrosts, confirms to obtain the relative humidity of condenser in the running time of the compressor of air-conditioning equipment.
In addition, the relative humidity of obtaining condenser comprises:
Obtain the detected rh value of humidity sensor of the air outlet place setting of condenser.
And, determine whether according to the temperature of the outer coil pipe of condenser that needs defrost and comprise:, then confirm and need defrost if the temperature of the outer coil pipe of condenser is lower than predetermined temperature threshold in the section at the fixed time.
According to another aspect of the present invention, a kind of defroster of air-conditioning equipment is provided, this defroster comprises:
Humidity sensor is arranged on the air outlet place of condenser, is used to detect the relative humidity at condenser air outlet place;
Determination module is used under the situation of relative humidity greater than the predetermined moisture threshold value of condenser, determines whether that according to the temperature of the outer coil pipe of condenser needs defrost;
The defrosting module is used under the situation that determination module is confirmed to defrost, carrying out defrost operation.
This defroster further comprises:
The operation detection module; Be used to detect the operation conditions of the compressor of air-conditioning equipment; Wherein, Reach the scheduled time length running time that detects the compressor of air-conditioning equipment at the operation detection module, and current time is that determination module obtains the relative humidity of condenser under the appointment situation constantly that defrosts from humidity sensor.
And determination module is used for being lower than under the situation of predetermined temperature threshold in the section at the fixed time in the temperature of the outer coil pipe of condenser, confirms and need defrost.
According to another aspect of the present invention, a kind of air-conditioning equipment is provided also, this air-conditioning equipment comprises:
Compressor;
Condenser;
Humidity sensor is arranged on the air outlet place of condenser, is used to detect the relative humidity at the condenser air outlet place of compressor;
Determination module is used under the situation of relative humidity greater than the predetermined moisture threshold value of condenser, determines whether that according to the temperature of the outer coil pipe of condenser needs defrost;
The defrosting module is used under the situation that determination module is confirmed to defrost, carrying out defrost operation.
Wherein, determination module is used for being lower than under the situation of predetermined temperature threshold in the section at the fixed time in the temperature of the outer coil pipe of condenser, confirms and need defrost.
The present invention is through obtaining the relative humidity of compressor condenser, and with the predetermined moisture threshold, judge whether and need carry out defrost operation air-conditioning equipment; Thereby can, defrosting determine whether to defrost in conjunction with humidity, when judging because the present invention considers that humidity is one of condition of frosting; And under the very low situation of temperature, if humidity is very low, the possibility of frosting is still lower; Therefore, defrosting judged result of the present invention is more accurate, objective, has both avoided unnecessary defrosting to cause the unit heating energy efficiency ratio to reduce; The very few unit frosting that causes has prevented again to defrost; And normally heat exchange running, the heating effect that has effectively improved compressor is poor, avoids because the problem that frosting causes air-conditioning equipment to break down.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use among the embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart according to the air-conditioning equipment Defrost method of the embodiment of the invention;
Fig. 2 is the schematic diagram according to the air-conditioning equipment Defrost method of the embodiment of the invention;
Fig. 3 is the block diagram according to the air-conditioning equipment defroster of the embodiment of the invention;
Fig. 4 is the block diagram according to the air-conditioning equipment of the embodiment of the invention.
The specific embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills obtained belongs to the scope that the present invention protects.
According to embodiments of the invention, a kind of Defrost method of air-conditioning equipment is provided.
As shown in Figure 1, comprise according to the Defrost method of the air-conditioning equipment of the embodiment of the invention:
Step S101 obtains the relative humidity at condenser air outlet place;
Step S103, if the relative humidity of condenser greater than the predetermined moisture threshold value, then the temperature according to the outer coil pipe of condenser determines whether that needs defrost;
Step S105 is confirming to carry out defrost operation under the situation that need defrost.
Wherein, reach scheduled time length, and current time is under the appointment situation constantly that defrosts, confirms to obtain the relative humidity of condenser in the running time of the compressor of air-conditioning equipment.
Particularly,, can judge whether the accumulated running time of compressor reaches very first time threshold value, be judged as under the situation that is, confirm to obtain the relative humidity of condenser for the judgement of time; In addition, can judge whether the continuous operating time of compressor reaches second time threshold, be judged as under the situation that is, confirm to obtain the relative humidity (very first time threshold value is greater than second time threshold) of condenser; In addition, the continuous operating time that also can reach very first time threshold value and compressor in the accumulated running time of compressor reaches under the situation of second time threshold, confirms to obtain the relative humidity of condenser.In addition, because defrost operation does not need frequent execution, so; Can be under above-mentioned accumulated running time and/or continuous operating time be all satisfied the demand the situation of the condition that defrosts; The time interval long enough (meeting or exceeding a time length threshold) of judging distance defrosting last time is to think that then current time is the appointment moment of defrosting if be judged as; And the definite relative humidity that need obtain condenser, so that determine whether to defrost according to relative humidity.
In addition; Whether compressor accumulated running time reaches whether very first time threshold value, continuous operating time reach second time threshold and whether reach Rule of judgment such as time span threshold value apart from time interval of defrosting last time can all be used; Also can accept or reject, a reference is partial condition wherein, in addition; When selecting above-mentioned a plurality of condition; Can for example, can judge accumulated running time earlier to the identical or different priority of condition setting that adopts; Reach in accumulated running time under the situation of very first time threshold value, whether the continuous operating time that whether time interval of defrosting judging distance last time reach the time span threshold value, judge compressor at last reaches second time threshold; Whether situation about also can certain two condition therein all satisfying the 3rd condition that judge satisfies, concrete combined situation exist a lot of in, this paper enumerates no longer one by one.
In addition, the relative humidity of obtaining condenser comprises:
Obtain the detected rh value of humidity sensor of the air outlet place setting of condenser.
And, determine whether according to the temperature of the outer coil pipe of condenser that needs defrost and comprise:, then confirm and need defrost if the temperature of the outer coil pipe of condenser is lower than predetermined temperature threshold in the section at the fixed time.
As shown in Figure 2, in the prior art, the defrosting sign is set during press runs when air-conditioning equipment heats comprises following condition: whether the outer shroud temperature too high does not allow defrosting; Confirm the defrost interval time according to the outer shroud temperature; Confirm the defrosting constant according to the outer shroud temperature; Confirm the defrosting coefficient according to dial-up; Whether satisfy defrost interval cumulative time and press endurance period; Coil temperature according to gentle coefficient of outer shroud and constant affirmation defrosting.And in technical scheme of the present invention, when judging the defrosting condition, not only detect gentle condenser coil of outer shroud and press accumulated running time and last time defrost interval, add the Humidity Detection decision condition simultaneously, consider the influence of humidity sensor to frosting.
For example, in the prior art,, then do not get into defrosting if outer shroud temperature (ambient temperature) Tao is in temperature difference section Tao＞20 ℃;
If outer shroud temperature Tao is in 6 ℃＜Tao of temperature difference section＜20 ℃, then press accumulative total was moved defrost interval 50 minutes, and press turned round 33 fens continuously, if outer coil temperature Te satisfies Te＜-6 ℃ lasting 5 minutes, then can get into defrosting;
If the outer shroud temperature is in this temperature difference ,-6 ℃＜Tao＜6 ℃, then defrost interval is 60 minutes, and press turned round 33 fens continuously, and Te＜=Tao*a-b continues 5 fens, then can get into defrosting, and wherein a and b are respectively constant;
If the outer shroud temperature is in this temperature difference, Tao＜-6 ℃, then defrost interval is 90 minutes, and press turned round 33 fens continuously, and Te＜=-15 ℃ continue 5 fens, then can get into defrosting.
And in technical scheme of the present invention, add humidity sensor after, humidity sensor is placed on the air outlet of condenser; Can not distinguish Tao segmentation (can consider the outer shroud temperature, also can consider the outer shroud temperature) now, satisfy press accumulative total and moved defrost interval 50 minutes; Continuously running 33 minutes of press if Te＜=0 ℃ and relative humidity RH＞=90% continued after 5 minutes, then being provided with defrosting sign (judgement need defrost) at once; That is to say; If be enough to damp condition in that the present invention is discontented,, also do not get into defrosting even then Te is very low; In addition, under the situation of considering the outer shroud temperature, need to judge earlier relative humidity RH equally; In relative humidity (for example greater than the predetermined moisture threshold value; Relative humidity RH＞=90% continued after 5 minutes), judge the outer shroud temperature whether between the given area, and whether the outer coil temperature of judgement is lower than predetermined temperature threshold; And be under the situation that is in judged result, judgement need defrost; If relative humidity does not satisfy,, can not defrost even then the outer coil temperature of outer shroud gentleness satisfies under the situation of defrosting condition yet.
According to embodiments of the invention, a kind of defroster of air-conditioning equipment is provided also.
As shown in Figure 3, comprise according to the defroster of the air-conditioning equipment of the embodiment of the invention:
This defroster further comprises:
Operation detection module (not shown); Be used to detect the operation conditions of the compressor of air-conditioning equipment; Wherein, Reach the scheduled time length running time that detects the compressor of air-conditioning equipment at the operation detection module, and current time is that determination module 32 obtains the relative humidity of condenser under the appointment situation constantly that defrosts from humidity sensor 31.
And determination module 32 is used for being lower than under the situation of predetermined temperature threshold in the section at the fixed time in the temperature of the outer coil pipe of condenser, confirms and need defrost.
According to embodiments of the invention, a kind of air-conditioning equipment is provided also.
As shown in Figure 4, comprise according to the defroster of the air-conditioning equipment of the embodiment of the invention:
Condenser (41);
Defrosting module 44 is used for confirming to carry out defrost operation under 43 situation that need defrost at determination module.
Wherein, determination module 43 is used for being lower than under the situation of predetermined temperature threshold in the section at the fixed time in the temperature of the outer coil pipe of condenser, confirms and need defrost.
In sum, by means of technique scheme of the present invention, through obtaining the relative humidity of compressor condenser, and with the predetermined moisture threshold, judge whether and need carry out defrost operation air-conditioning equipment.Technical scheme of the present invention increases the judgement for humidity in the defrosting decision condition, strengthened independence and flexibility that defrosting is judged; More accurate, both avoided unnecessary defrosting to cause the unit heating energy efficiency ratio to reduce, prevented that again the defrosting decision condition is unreasonable; The very few unit frosting that causes defrosts; And normally heat exchange running, heating effect is poor, even defective such as cause that air-conditioning equipment breaks down.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the Defrost method of an air-conditioning equipment is characterized in that, comprising:
Obtain the relative humidity at condenser air outlet place;
If the relative humidity of said condenser is greater than the predetermined moisture threshold value, then the temperature according to the outer coil pipe of said condenser determines whether that needs defrost;
Confirming to carry out defrost operation under the situation that need defrost.
2. Defrost method according to claim 1 is characterized in that, reaches scheduled time length in the running time of the compressor of air-conditioning equipment, and current time is under the appointment situation constantly that defrosts, and confirms to obtain the relative humidity of said condenser.
3. Defrost method according to claim 1 is characterized in that, the relative humidity of obtaining said condenser comprises:
Obtain the detected rh value of humidity sensor of the air outlet place setting of said condenser.
4. Defrost method according to claim 1 is characterized in that, determines whether according to the temperature of the outer coil pipe of said condenser that needs defrost and comprises:
If the temperature of the outer coil pipe of said condenser is lower than predetermined temperature threshold in the section at the fixed time, then confirms and to defrost.
5. the defroster of an air-conditioning equipment is characterized in that, comprising:
Humidity sensor is arranged on the air outlet place of said condenser, is used to detect the relative humidity at condenser air outlet place;
Determination module is used under the situation of relative humidity greater than the predetermined moisture threshold value of said condenser, determines whether that according to the temperature of the outer coil pipe of said condenser needs defrost;
The defrosting module is used under the situation that said determination module is confirmed to defrost, carrying out defrost operation.
6. defroster according to claim 5 is characterized in that, further comprises:
The operation detection module; Be used to detect the operation conditions of the compressor of air-conditioning equipment; Wherein, Reach the scheduled time length running time that detects the compressor of said air-conditioning equipment at said operation detection module, and current time is that said determination module obtains the relative humidity of said condenser under the appointment situation constantly that defrosts from said humidity sensor.
7. defroster according to claim 5 is characterized in that, said determination module is used for being lower than under the situation of predetermined temperature threshold in the section at the fixed time in the temperature of the outer coil pipe of said condenser, confirms and need defrost.
8. an air-conditioning equipment is characterized in that, comprising:
Compressor;
Condenser;
Humidity sensor is arranged on the air outlet place of said condenser, is used to detect the relative humidity at the condenser air outlet place of compressor;
Determination module is used under the situation of relative humidity greater than the predetermined moisture threshold value of said condenser, determines whether that according to the temperature of the outer coil pipe of said condenser needs defrost;
The defrosting module is used under the situation that said determination module is confirmed to defrost, carrying out defrost operation.
9. air-conditioning equipment according to claim 8 is characterized in that, said determination module is used for being lower than under the situation of predetermined temperature threshold in the section at the fixed time in the temperature of the outer coil pipe of said condenser, confirms and need defrost.
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| CN201210205144.1A CN102706054B (en) | 2012-06-20 | 2012-06-20 | The Defrost method of air-conditioning equipment, device and air-conditioning equipment |
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| CN103954006A (en) * | 2014-04-03 | 2014-07-30 | 广东美的集团芜湖制冷设备有限公司 | Defrosting control method of air conditioner |
| CN105299843A (en) * | 2015-11-17 | 2016-02-03 | 广东美的制冷设备有限公司 | Method for controlling air conditioner to enter defrosting mode and air conditioner |
| CN105674496A (en) * | 2016-02-02 | 2016-06-15 | 青岛海尔空调器有限总公司 | Defrosting method for air conditioner |
| CN106196480A (en) * | 2016-07-28 | 2016-12-07 | 珠海格力电器股份有限公司 | Defrosting control method and device |
| CN106524388A (en) * | 2015-09-11 | 2017-03-22 | 弗德里希新能源科技(杭州)股份有限公司 | Defrosting control method for heat pump unit and air conditioner heat pump unit adopting defrosting control method |
| CN107084499A (en) * | 2017-05-17 | 2017-08-22 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN107120798A (en) * | 2017-05-17 | 2017-09-01 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN107120796A (en) * | 2017-05-17 | 2017-09-01 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN107131611A (en) * | 2017-05-17 | 2017-09-05 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
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| CN109959118A (en) * | 2018-12-18 | 2019-07-02 | 青岛经济技术开发区海尔热水器有限公司 | A kind of defrosting control method and air source heat pump system |
| CN110631183A (en) * | 2018-06-25 | 2019-12-31 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN112032913A (en) * | 2020-08-20 | 2020-12-04 | 广东纽恩泰新能源科技发展有限公司 | Method for detecting frosting state of heat exchanger by temperature and humidity sensor |
| CN112484232A (en) * | 2020-11-23 | 2021-03-12 | 珠海格力电器股份有限公司 | Air conditioner control method and device with expert diagnosis function and air conditioning unit |
| WO2021052193A1 (en) * | 2019-09-17 | 2021-03-25 | 青岛海尔空调电子有限公司 | Method for controlling balanced frosting of outdoor units in multi-split air-conditioning system |
| CN112944754A (en) * | 2021-04-01 | 2021-06-11 | 刘兵兵 | Constant-temperature refrigeration house system with hot fluorine automatic defrosting function |
| CN113899156A (en) * | 2021-10-11 | 2022-01-07 | 珠海格力电器股份有限公司 | Refrigeration equipment, defrosting control method, defrosting control device, defrosting control system and storage medium of refrigeration equipment |
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| CN103954006A (en) * | 2014-04-03 | 2014-07-30 | 广东美的集团芜湖制冷设备有限公司 | Defrosting control method of air conditioner |
| CN106524388A (en) * | 2015-09-11 | 2017-03-22 | 弗德里希新能源科技(杭州)股份有限公司 | Defrosting control method for heat pump unit and air conditioner heat pump unit adopting defrosting control method |
| CN105299843A (en) * | 2015-11-17 | 2016-02-03 | 广东美的制冷设备有限公司 | Method for controlling air conditioner to enter defrosting mode and air conditioner |
| CN105299843B (en) * | 2015-11-17 | 2017-10-27 | 广东美的制冷设备有限公司 | Air conditioner is controlled to enter the method and air conditioner of defrosting mode |
| CN105674496B (en) * | 2016-02-02 | 2019-07-23 | 青岛海尔空调器有限总公司 | A kind of air-conditioner defrosting method |
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| CN107084499A (en) * | 2017-05-17 | 2017-08-22 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN107120796A (en) * | 2017-05-17 | 2017-09-01 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
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| US12000605B2 (en) | 2019-09-17 | 2024-06-04 | Qingdao Haier Air-Conditioning Electronic Co., Ltd | Method for controlling balanced frosting of outdoor units in multi-split air-conditioning system |
| CN112032913A (en) * | 2020-08-20 | 2020-12-04 | 广东纽恩泰新能源科技发展有限公司 | Method for detecting frosting state of heat exchanger by temperature and humidity sensor |
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| CN113899156B (en) * | 2021-10-11 | 2022-08-12 | 珠海格力电器股份有限公司 | Refrigeration equipment, defrosting control method, device and system thereof, and storage medium |
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