CN102706054B - The Defrost method of air-conditioning equipment, device and air-conditioning equipment - Google Patents
The Defrost method of air-conditioning equipment, device and air-conditioning equipment Download PDFInfo
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- CN102706054B CN102706054B CN201210205144.1A CN201210205144A CN102706054B CN 102706054 B CN102706054 B CN 102706054B CN 201210205144 A CN201210205144 A CN 201210205144A CN 102706054 B CN102706054 B CN 102706054B
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- conditioning equipment
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Abstract
The invention discloses a kind of Defrost method of air-conditioning equipment, device and air-conditioning equipment, the method includes：Obtain the relative humidity at condenser air outlet；If the relative humidity of condenser is more than predetermined moisture threshold value, the temperature of the outer coil pipe according to condenser determines the need for being defrosted；Defrosting operation is carried out in the case of it is determined that needing to be defrosted.Relative humidity by obtaining compressor condenser of the invention; and compared with predetermined moisture threshold value; to judge whether to need to carry out defrosting operation to air-conditioning equipment; so as to when defrosting judges; it is made to determine whether to be defrosted with reference to humidity; make defrosting judged result more accurate, objective; both having avoided unnecessary defrosting causes the reduction of unit heating energy efficiency ratio; preventing defrosting again very few causes unit frosting; and the operating that can not normally exchange heat; the heating effect for effectively improving compressor is poor, it is to avoid because frosting causes the problem that air-conditioning equipment breaks down.
Description
Technical field
The present invention relates to field of air conditioning, in particular it relates to a kind of Defrost method of air-conditioning equipment, device and air-conditioning equipment.
Background technology
Air-conditioner set in winter heating operation, when dew-point temperature of the condenser surface temperature in outside less than surrounding air
And during less than 0 degree, condenser surface will frosting.The great deterioration of heat-transfer effect of frosting post-condenser, heating effect declines, sternly
Unit can be out of service during weight.Therefore the subject matter of unit application and development is influenceed during heat exchanger frosting.It is empty in practical application
Adjust unit application environment it is more complicated, the regional humidity having is larger, and some places humidity is smaller, air-conditioner set whether frosting not
Light is relevant with the gentle condenser coil of outer shroud, largely influenced by humidity, that is to say, that and dew-point temperature has directly
Connect relation.
Generally, it is believed that in the case that outer shroud temperature is low, humidity will be with reduction, so in the low situation of outer shroud temperature
Under, judging the coil temperature point of the condenser of frosting also reduces, and defrosting accumulated running time does not carry out humidity bar also with lengthening
The judgement of part.But in some coastal cities, or the larger place of relative humidity, in the case that outer shroud temperature is low, humidity is also very
Greatly, judge that the coil temperature of defrosting should not be reduced, the press cumulative time should not also lengthen, and otherwise just be easy to frosting, and
Influence the normal operation of unit.
When current each producer is all mostly only with operating is added up according to the gentle condenser coil condition of outer shroud and press
Between three conditions carry out the judgement of defrosting condition.In some big multiple on-line systems, the outer machine of air-conditioner set has two dial-ups to set
Put defrosting factor alpha, there is provided three coefficients, in the place of easy frosting, by this dial-up of the physical host of outer machine selection coefficient compared with
Small numerical value, in the place for being not easy frosting, selection coefficient larger dial-up under general case, is set to middle coefficient dial-up,
But the traditional scheme dial-up setting that has been general carrying out, the situation in real-world operation can exist very big partially with perfect condition
Difference, causes excessive, the heating effect decline that defrosts, or not enough, the easy frosting that defrosts, and influence unit normally runs.
For the problem of the defrosting decision method existing defects of air-conditioning equipment in correlation technique, not yet propose at present effective
Solution.
The content of the invention
For air-conditioning equipment in correlation technique in coastal area or other humidity larger areas, existing defrosting decision condition
Not enough problem is easily judged defrosting condition, and the present invention proposes a kind of Defrost method of air-conditioning equipment, device and air-conditioning equipment,
By obtaining the relative humidity of compressor condenser, and can judge whether to need to sky compared with predetermined moisture threshold value
Tune equipment carries out defrosting operation.
The technical proposal of the invention is realized in this way：
According to an aspect of the invention, there is provided a kind of Defrost method of air-conditioning equipment, the Defrost method includes：
Obtain the relative humidity at condenser air outlet；
If the relative humidity of condenser is more than predetermined moisture threshold value, the temperature determination of the outer coil pipe according to condenser is
No needs are defrosted；
Defrosting operation is carried out in the case of it is determined that needing to be defrosted.
Wherein, the run time in the compressor of air-conditioning equipment reaches scheduled time length, and current time to be removed
In the case of the specified moment of frost, it is determined that needing to obtain the relative humidity of condenser.
Additionally, the relative humidity for obtaining condenser includes：
Obtain the rh value that the humidity sensor set at the air outlet of condenser is detected.
Also, the temperature of the outer coil pipe according to condenser determines the need for carrying out defrosting including：If condenser is outer
The temperature of coil pipe is less than predetermined temperature threshold within a predetermined period of time, it is determined that needs are defrosted.
According to another aspect of the present invention, there is provided a kind of defroster of air-conditioning equipment, the defroster includes：
Humidity sensor, is arranged at the air outlet of condenser, for detecting the relative humidity at condenser air outlet；
Determining module, in the case of being more than predetermined moisture threshold value in the relative humidity of condenser, according to condenser
The temperature of outer coil pipe determines the need for being defrosted；
Defrosting module, for carrying out defrosting operation in the case where determining module determines that needs are defrosted.
The defroster is further included：
Operation detection module, the operation conditions of the compressor for detecting air-conditioning equipment, wherein, in operation detection module inspection
The run time for measuring the compressor of air-conditioning equipment reaches scheduled time length, and current time is the specified moment defrosted
In the case of, determining module obtains the relative humidity of condenser from humidity sensor.
Also, determining module is used to be less than predetermined temperature threshold within a predetermined period of time in the temperature of the outer coil pipe of condenser
In the case of, it is determined that needs are defrosted.
According to another aspect of the present invention, a kind of air-conditioning equipment is additionally provided, the air-conditioning equipment includes：
Compressor；
Condenser；
Humidity sensor, is arranged at the air outlet of condenser, for the phase at the condenser air outlet for detecting compressor
To humidity；
Determining module, in the case of being more than predetermined moisture threshold value in the relative humidity of condenser, according to condenser
The temperature of outer coil pipe determines the need for being defrosted；
Defrosting module, for carrying out defrosting operation in the case where determining module determines that needs are defrosted.
Wherein it is determined that module is used to be less than predetermined temperature threshold within a predetermined period of time in the temperature of the outer coil pipe of condenser
In the case of, it is determined that needs are defrosted.
The present invention judges to be by obtaining the relative humidity of compressor condenser compared with predetermined moisture threshold value
It is no to need to carry out defrosting operation to air-conditioning equipment such that it is able to when defrosting judges, to be made to determine whether to be removed with reference to humidity
Frost, in view of humidity is one of condition of frosting due to the present invention, and in the case where temperature is very low, if humidity is very low,
The possibility of frosting is still relatively low, therefore, defrosting judged result of the invention is more accurate, objective, and it is unnecessary both to have avoided
Defrosting causes the reduction of unit heating energy efficiency ratio, prevents that defrosting is very few to cause unit frosting again, and the operating that can not normally exchange heat, have
The heating effect that effect improves compressor is poor, it is to avoid because frosting causes the problem that air-conditioning equipment breaks down.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing for needing to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also obtain according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the flow chart of air-conditioning equipment Defrost method according to embodiments of the present invention；
Fig. 2 is the schematic diagram of air-conditioning equipment Defrost method according to embodiments of the present invention；
Fig. 3 is the block diagram of air-conditioning equipment defroster according to embodiments of the present invention；
Fig. 4 is the block diagram of air-conditioning equipment according to embodiments of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained belongs to present invention protection
Scope.
A kind of embodiments in accordance with the present invention, there is provided Defrost method of air-conditioning equipment.
As shown in figure 1, the Defrost method of air-conditioning equipment according to embodiments of the present invention includes：
Step S101, obtains the relative humidity at condenser air outlet；
Step S103, if the relative humidity of condenser is more than predetermined moisture threshold value, the outer coil pipe according to condenser
Temperature determines the need for being defrosted；
Step S105, defrosting operation is carried out in the case of it is determined that needing to be defrosted.
Wherein, the run time in the compressor of air-conditioning equipment reaches scheduled time length, and current time to be removed
In the case of the specified moment of frost, it is determined that needing to obtain the relative humidity of condenser.
Specifically, for the judgement of time, it can be determined that whether the accumulated running time of compressor reaches very first time threshold
Value, in the case where being judged as YES, it is determined that needing to obtain the relative humidity of condenser；Furthermore it is possible to judge the continuous of compressor
Whether run time reaches the second time threshold, in the case where being judged as YES, it is determined that needing to obtain the relative humidity of condenser
(very first time threshold value is more than the second time threshold)；In addition it is also possible to reach the very first time in the accumulated running time of compressor
In the case that the continuous operating time of threshold value and compressor reaches the second time threshold, it is determined that needing to obtain the phase of condenser
To humidity.Further, since defrosting is operated and need not frequently executed, so, can be in above-mentioned accumulated running time and/or continuous
In the case that run time all meets the condition that needs are defrosted, the judging distance last time time interval long enough of defrosting (reaches
To or more than a time length threshold), if the judgment is Yes, then it is assumed that current time is the specified moment defrosted, and really
Surely the relative humidity of acquisition condenser is needed, to determine whether to be defrosted according to relative humidity.
Additionally, whether compressor accumulated running time reaches whether very first time threshold value, continuous operating time reach second
Whether time threshold and the time interval apart from last time defrosting reach the Rule of judgment such as time span threshold value and can all make
With, it is also possible to accepted or rejected, only referring to which part condition, in addition, when stating multiple conditions in the choice, can be to the bar of use
Part sets identical or different priority, for example, can first judge accumulated running time, when accumulated running time reaching first
Between in the case of threshold value, whether the judging distance last time time interval of defrosting reaches time span threshold value, finally judges compressor
Continuous operating time whether reach the second time threshold；Certain two condition that can also be wherein judge in the case of all meeting
Whether the 3rd condition meets, and during specific combined situation is present a lot, will not enumerate herein.
Additionally, the relative humidity for obtaining condenser includes：
Obtain the rh value that the humidity sensor set at the air outlet of condenser is detected.
Also, the temperature of the outer coil pipe according to condenser determines the need for carrying out defrosting including：If condenser is outer
The temperature of coil pipe is less than predetermined temperature threshold within a predetermined period of time, it is determined that needs are defrosted.
As shown in Fig. 2 setting defrosting mark during press runs includes following bar in the prior art, when air-conditioning equipment is heated
Part：Whether outer shroud temperature is too high not to allow defrosting；Defrosting interval time is confirmed according to outer shroud temperature；Confirm that defrosting is normal according to outer shroud temperature
Number；Defrosting coefficient is confirmed according to dial-up；Whether satisfaction defrosting is spaced cumulative time and press endurance period；According to outer shroud temperature
With the coil temperature that coefficient and constant confirm defrosting.And in the inventive solutions, when defrosting condition is judged, not only
The detection gentle condenser coil of outer shroud and press accumulated running time and last time defrosting interval, while adding Humidity Detection to sentence
Fixed condition, it is considered to influence of the humidity sensor to frosting.
For example, in the prior art, if outer shroud temperature (ambient temperature) Tao is in 20 DEG C of temperature difference section Tao ＞, not entering
Enter defrosting；
If outer shroud temperature Tao is in the temperature difference 6 DEG C of 20 DEG C of ＜ Tao ＜ of section, press is accumulative to run 50 points of defrosting interval, and press connects
Reforwarding turns 33 points, if outer coil temperature Te meets ＜ -6 DEG C of Te continues 5 points, can enter defrosting；
If outer shroud temperature is in this temperature difference, -6 DEG C of 6 DEG C of ＜ Tao ＜, then defrosting is spaced 60 points, and press continuously runs 33 points,
Te ＜=Tao*a-b continues 5 points, then can enter defrosting, and wherein a and b are respectively constant；
If outer shroud temperature is in this temperature difference, ＜ -6 DEG C of Tao, then defrosting is spaced 90 points, and press continuously runs 33 points, Te ＜
=-15 DEG C continue 5 points, then can enter defrosting.
And in the inventive solutions, after adding humidity sensor, humidity sensor is placed on the air-out of condenser
Mouthful, it now is possible to Tao segmentations (outer shroud temperature may not necessarily be considered, it is also possible to consider outer shroud temperature) is not differentiated between, the accumulative fortune of press is met
50 points of row defrosting interval, press continuously runs 33 points, if after Te ＜=0 DEG C and relative humidity RH ＞=90% continue 5 points, horse
It is upper that defrosting mark (judging that needs are defrosted) is set, that is to say, that if being unsatisfactory for above damp condition in the present invention, i.e.,
Make Te very low, defrosting is not entered yet；In addition, in the case where outer shroud temperature is considered, need also exist for first judging relative humidity RH,
Relative humidity be more than predetermined moisture threshold value (for example, after relative humidity RH ＞=90% continues 5 points), judge outer shroud temperature whether to
Fixed interval, and judge whether outer coil temperature is less than predetermined temperature threshold, and in the case where the judgment result is yes, judge to need
Defrosted；If relative humidity is unsatisfactory for, even if in the case that the gentle outer coil temperature of outer shroud meets defrosting condition,
Will not be defrosted.
Embodiments in accordance with the present invention, additionally provide a kind of defroster of air-conditioning equipment.
As shown in figure 3, the defroster of air-conditioning equipment according to embodiments of the present invention includes：
Humidity sensor 31, is arranged at the air outlet of condenser, for detecting the relative humidity at condenser air outlet；
Determining module 32, in the case of being more than predetermined moisture threshold value in the relative humidity of condenser, according to condenser
The temperature of outer coil pipe determine the need for being defrosted；
Defrosting module 33, for carrying out defrosting operation in the case where determining module 32 determines that needs are defrosted.
The defroster is further included：
Operation detection module (not shown), the operation conditions of the compressor for detecting air-conditioning equipment, wherein, examined in operation
The run time for surveying the compressor that module detects air-conditioning equipment reaches scheduled time length, and current time is defrosted
In the case of specifying the moment, determining module 32 obtains the relative humidity of condenser from humidity sensor 31.
Also, determining module 32 is used to be less than predetermined temperature threshold within a predetermined period of time in the temperature of the outer coil pipe of condenser
In the case of value, it is determined that needs are defrosted.
Embodiments in accordance with the present invention, additionally provide a kind of air-conditioning equipment.
As shown in figure 4, the defroster of air-conditioning equipment according to embodiments of the present invention includes：
Condenser (41)；
Humidity sensor 42, is arranged at the air outlet of condenser, relatively wet at the air outlet of condenser 41 for detecting
Degree；
Determining module 43, in the case of being more than predetermined moisture threshold value in the relative humidity of condenser, according to condenser
The temperature of outer coil pipe determine the need for being defrosted；
Defrosting module 44, for carrying out defrosting operation in the case where determining module determines that 43 needs are defrosted.
Wherein it is determined that module 43 is used to be less than predetermined temperature threshold within a predetermined period of time in the temperature of the outer coil pipe of condenser
In the case of value, it is determined that needs are defrosted.
In sum, by means of above-mentioned technical proposal of the invention, by obtaining the relative humidity of compressor condenser, and
Judge whether to need compared with predetermined moisture threshold value to carry out defrosting operation to air-conditioning equipment.Technical scheme exists
In defrosting decision condition, increase the judgement for humidity, enhance independence and flexibility that defrosting judges, more accurately, both kept away
Having exempted from unnecessary defrosting causes the reduction of unit heating energy efficiency ratio, prevents defrosting decision condition unreasonable again, very few leading of defrosting
Unit frosting is caused, and the operating that can not normally exchange heat, heating effect is poor, even result in air-conditioning equipment and the defect such as break down.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (5)
1. a kind of Defrost method of air-conditioning equipment, it is characterised in that including：
Obtain the relative humidity at condenser air outlet；
If the relative humidity of the condenser is more than predetermined moisture threshold value, the temperature of the outer coil pipe according to the condenser is true
It is fixed whether to need to be defrosted；
Defrosting operation is carried out in the case of it is determined that needing to be defrosted,
Wherein, the run time in the compressor of air-conditioning equipment reaches scheduled time length, and current time is defrosted
In the case of specifying the moment, it is determined that needing to obtain the relative humidity at the condenser air outlet.
2. Defrost method according to claim 1, it is characterised in that the relative humidity for obtaining the condenser includes：
Obtain the rh value that the humidity sensor set at the air outlet of the condenser is detected.
3. Defrost method according to claim 1, it is characterised in that the temperature of the outer coil pipe according to the condenser determines
Whether need to carry out defrosting to include：
If the temperature of the outer coil pipe of the condenser is less than predetermined temperature threshold within a predetermined period of time, it is determined that needs are carried out
Defrosting.
4. a kind of defroster of air-conditioning equipment, it is characterised in that including：
Humidity sensor, is arranged at the air outlet of condenser, for detecting the relative humidity at condenser air outlet；
Determining module, in the case of being more than predetermined moisture threshold value in the relative humidity of the condenser, according to the condensation
The temperature of the outer coil pipe of device determines the need for being defrosted；
Defrosting module, for carrying out defrosting operation in the case where the determining module determines that needs are defrosted；
Operation detection module, the operation conditions of the compressor for detecting air-conditioning equipment, wherein, in the operation detection module inspection
The run time for measuring the compressor of the air-conditioning equipment reaches scheduled time length, and current time is specifying of being defrosted
In the case of moment, the determining module obtains the relative humidity at the condenser air outlet from the humidity sensor.
5. defroster according to claim 4, it is characterised in that the determining module is used in the outer of the condenser
In the case that the temperature of coil pipe is less than predetermined temperature threshold within a predetermined period of time, it is determined that needs are defrosted.
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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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|---|---|---|---|
| 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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| CN102706054B true CN102706054B (en) | 2017-06-06 |
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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 |
| 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 |
| CN106196480B (en) * | 2016-07-28 | 2020-11-10 | 珠海格力电器股份有限公司 | Defrosting control method and device |
| 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 |
| CN107131611B (en) * | 2017-05-17 | 2020-05-29 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| 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 |
| CN107289576B (en) * | 2017-05-17 | 2020-07-31 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| CN107120796B (en) * | 2017-05-17 | 2020-09-25 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| CN108444035A (en) * | 2018-02-14 | 2018-08-24 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN110631183B (en) * | 2018-06-25 | 2022-04-19 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| 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 |
| CN112524746B (en) * | 2019-09-17 | 2021-11-26 | 青岛海尔空调电子有限公司 | Control method for outdoor unit balanced frosting 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 |
| CN112484232B (en) * | 2020-11-23 | 2022-10-14 | 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 |
| CN112944754A (en) * | 2021-04-01 | 2021-06-11 | 刘兵兵 | Constant-temperature refrigeration house system with hot fluorine automatic defrosting function |
| 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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