CN101660808B - Air conditioner and frost removal control method thereof - Google Patents
Air conditioner and frost removal control method thereof Download PDFInfo
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- CN101660808B CN101660808B CN2008101417331A CN200810141733A CN101660808B CN 101660808 B CN101660808 B CN 101660808B CN 2008101417331 A CN2008101417331 A CN 2008101417331A CN 200810141733 A CN200810141733 A CN 200810141733A CN 101660808 B CN101660808 B CN 101660808B
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Abstract
The invention provides an air conditioner and a frost removal control method of the air conditioner. The air conditioner comprises a controller, an outdoor direct current fan, a condenser and a current detecting unit which detects the current changes of the outdoor direct current fan and feeds the detection result back to the controller. The frost removal control method of the air conditioner comprises the following steps: a, judging whether the air conditioner is frosted through the current changes of the outdoor direct current fan and the temperature of the condenser; and b, judging whether the frost removal is finished through the current changes of the outdoor direct current fan and the temperature of the condenser. The conditioner and the frost removal control method of the air conditioner can judge whether the condenser of the air conditioner is frosted and whether the frost removal is finished together by combining the temperature of the condenser with the current changes of the outdoor direct current fan, and have the advantage of accurate and intelligent frost removal.
Description
Technical field
The present invention relates to the air-conditioner field, relate in particular to a kind of air-conditioner and defrosting control method thereof that can intelligent defrosting.
Background technology
Air-conditioner is a kind of widely used apparatus of air conditioning, and major function is that temperature, the humidity to air is regulated, and the refrigeration of air-conditioner, to heat principle be through cold-producing medium; Heat is carried out heat exchange through indoor evaporimeter or outdoor condenser; Heat in the process at air-conditioning, the temperature of outdoor condenser is lower, under the lower environment of outdoor temperature; The frosting phenomenon can appear in outdoor condenser; Influence the normal use of air-conditioner, so the defrosting control method of air-conditioner being an automatically important step in the control of air-conditioner, also is important problem in the industry.In existing technology, defrosting control method mainly contains following several kinds: 1, time defrosting method, promptly whenever one period regular time of air-conditioning heating operation, no matter whether defrosting work is all carried out in frosting to condenser.2, indoor pipe temperature defrosting (often being called intelligent defrosting method) promptly utilizes indoor pipe temperature sensor to gather the temperature of evaporimeter, and the variation of temperature situation according to evaporimeter judges whether to defrost.3, outdoor pipe temperature defrosting utilizes outdoor pipe temperature sensor to gather the temperature of condenser, according to the temperature conditions of condenser; Declare the whether frosting of outdoor condenser, for example, if the temperature of outdoor condenser is lower than-8 ℃; And compressor operation promptly defrosted in full 50 minutes; When outdoor Guan Wen >=20 ℃, or defrosting surpasses 10 minutes, then withdraws from defrosting.
Yet have following shortcoming in above-mentioned method: the situation of frostless defrosting usually appears in employing method 1, can make to heat in the time of defrosting to stop, and influences user's use, even the overload of compressor phenomenon can occur.Method 2 is difficult to judge for whether having removed frost fully in defrost process.3 of methods just are lower than unique foundation of a certain temperature frosting as whether to outdoor condenser temperature; Yet outdoor condenser temperature is under a certain low temperature condition; Not necessarily can frosting, or the situation of frosting is different, complete like this with temperature as defrosting according to just there being irrational place.
In view of Defrost technology of the prior art all can't be accomplished intellectuality, therefore, a kind of defrosting real necessity that belongs to of intelligent air condition device accurately is provided.
Summary of the invention
The object of the present invention is to provide a kind of air-conditioner and defrosting control method thereof, be intended to solve the not intelligent defective of existence defrosting in the prior art.
The defrosting control method of air-conditioner provided by the invention may further comprise the steps:
Step a, the electric current through outdoor dc fan changes and condenser temperature is judged whether frosting;
Step b judges through the electric current variation and the condenser temperature of outdoor dc fan whether defrosting is accomplished;
Wherein, Said step a specifically may further comprise the steps: ask the current maxima and the minimum of a value of outdoor dc fan and calculate maximum and minimum of a value poor, if difference judges then that greater than predetermined difference electric current is uphill process or decline process; If uphill process; Whether the temperature of then judging condenser satisfies less than predetermined temperature value, if satisfy, then judges condenser frosting.
Said step b specifically may further comprise the steps: ask the current maxima and the minimum of a value of outdoor dc fan and calculate the poor of maximum and minimum of a value; If difference is less than predetermined difference; Judge that then electric current is uphill process or decline process, if the decline process judges then whether the temperature of outdoor condenser satisfies greater than preset temperature value; If satisfy, promptly judging defrosts accomplishes.
Air-conditioner provided by the invention and defrosting control method thereof can combine the electric current situation of change of condenser temperature and outdoor fan come common judge air-conditioning condenser whether frosting and defrosting whether accomplish, according to the accurate and intelligent advantage of defrosting is arranged.
Fig. 1 is the hardware configuration sketch map of air-conditioner of the present invention;
Description of drawings
Fig. 2 is the main flow chart of the defrosting control method of air-conditioner of the present invention;
Fig. 3 is a frosting decision flowchart involved in the present invention;
Fig. 4 is that decision flowchart is accomplished in defrosting involved in the present invention.
For the purpose, technical scheme and the advantage that make invention is clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The specific embodiment
The condenser of air-conditioning is not when air-conditioning has frosting; Air-flow can be smoothly fin through condenser arrive outer blower fan, it bears at this time outer relatively blower fan is maximum load, and is white if the condenser knot is expired; Air-flow can not be through the fin of condenser; It bears at this time outer relatively blower fan is minimum load, for the such dc motor of outer blower fan, under identical voltage; The size of the different electric currents of load is also different; The defrosting control method of air-conditioner of the present invention be exactly according to condenser not during frosting windage constant basically, and characteristics that windage reduces after the frosting, with the size of current of detected direct current generator as judging whether one of foundation that defrost.
The hardware configuration of air-conditioner involved in the present invention is as shown in fig. 1, and air-conditioner comprises the indoor controller 11 that is used for control room inner control part 12, and indoor control section 12 comprises indoor fan, indoor temperature transmitter etc.; The rotational speed drives 14 that is used for dc fan 15 outside the drive chamber; Be used to gather the outdoor pipe temperature sensor 16 of condenser temperature; Outdoor controller 13 is controlled rotational speed drives 14 and is connected with indoor controller 11; Certainly, air-conditioner also comprises well-known components such as compressor 17, cross valve 18, and these structures belong to the category of prior art, do not give unnecessary details at this.
Outdoor pipe temperature sensor 16 of the present invention is constantly gathered condenser temperature in the running of air-conditioning; Whether completely as judging whether frosting and defrosting one of foundation, outdoor controller 13 is through controlling the control that rotational speed drives 14 realizes outdoor dc fan 15, in the running of outdoor dc fan 15 simultaneously with it; Variation along with its windage size; Electric current changes, and a current detecting unit (figure does not show) is set, and the electric current of outdoor dc fan 15 is detected; Then testing result is fed back to outdoor controller 13; Outdoor controller 13 with the electric current situation of change as judging whether frosting and judging whether defrosting accomplishes another foundation, and typical, the size of current of outdoor controller 13 is to feed back to outdoor controller 13 through rotational speed drives 14.Through above-mentioned two foundations, the present invention has realized the judgement whether whether frosting and frosting are accomplished.
In conjunction with referring to described in Fig. 2, the defrosting control method of air-conditioner of the present invention specifically may further comprise the steps:
Shown in figure 3, the detailed step that frosting described in the step 21 is judged is following:
In the step 31, at first current pattern is analyzed, if not heating mode, then condenser does not have the frosting situation; Program withdraws from, otherwise gets into step 32, asks the current maxima and the minimum of a value of outdoor dc fan 15; Current maxima here and minimum of a value are that to bring into operation from air-conditioning be opening entry, calculate the difference K1 of maximum and minimum of a value, when K1>=Q1 (Q1 is predetermined temperature gap); Then get into step 34, judge that electric current is uphill process or decline process, if the decline process then falls back on step 32; Otherwise execution in step 35, whether the temperature OPT1 of analysis room's external condenser satisfies OPT1≤N1 (N1 is predetermined temperature value), if satisfy; Then getting into step 36, at this time is the frosting of decidable condenser, puts the defrosting sign.
When the judgement of frosting is accomplished, and when finding the defrosting sign, air-conditioner is carried out the defrosting action, and the working method of the described defrost process of step 22 and principle all are unusual technique known, so do not give unnecessary details at this.
The detailed step that defrosting completion described in the step 23 is judged is at first judged current whether the defrosting in step 41, if not defrosting as shown in Figure 4; Then withdraw from, otherwise execution in step 42, the current maxima of dc fan 15 and minimum of a value outside the sensing chamber; Thereby try to achieve the difference K1 of electric current maximum and minimum of a value,, get into step 44 and judge that electric current is uphill process or decline process as K1 >=Q1; If uphill process then returns execution in step 42, otherwise go into step 45, whether the temperature OPT1 of analysis room's external condenser satisfies OPT1 >=N1; If satisfy, i.e. decidable defrosting is accomplished, at the mid-defrosting complement mark of step 46.
The foregoing description only is preferred embodiment of the present invention, and the present invention is not limited thereto.All any modifications of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. the defrosting control method of an air-conditioner is characterized in that may further comprise the steps:
Step a, the electric current through outdoor dc fan changes and condenser temperature is judged whether frosting;
Step b judges through the electric current variation and the condenser temperature of outdoor dc fan whether defrosting is accomplished;
Wherein, Said step a specifically may further comprise the steps: ask the current maxima and the minimum of a value of outdoor dc fan and calculate maximum and minimum of a value poor, if difference judges then that greater than predetermined difference electric current is uphill process or decline process; If uphill process; Whether the temperature of then judging condenser satisfies less than predetermined temperature value, if satisfy, then judges condenser frosting.
2. the defrosting control method of air-conditioner according to claim 1 is characterized in that, said step b specifically may further comprise the steps: ask the current maxima and the minimum of a value of outdoor dc fan and calculate the poor of maximum and minimum of a value; If difference is less than predetermined difference; Judge that then electric current is uphill process or decline process, if the decline process judges then whether the temperature of outdoor condenser satisfies greater than preset temperature value; If satisfy, promptly judging defrosts accomplishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101417331A CN101660808B (en) | 2008-08-29 | 2008-08-29 | Air conditioner and frost removal control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101417331A CN101660808B (en) | 2008-08-29 | 2008-08-29 | Air conditioner and frost removal control method thereof |
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| Publication Number | Publication Date |
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| CN101660808A CN101660808A (en) | 2010-03-03 |
| CN101660808B true CN101660808B (en) | 2012-01-04 |
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| CN2008101417331A Expired - Fee Related CN101660808B (en) | 2008-08-29 | 2008-08-29 | Air conditioner and frost removal control method thereof |
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| CN110848886B (en) * | 2019-11-28 | 2022-04-15 | 广东美的制冷设备有限公司 | Air conditioner, defrosting method thereof and computer readable storage medium |
| CN111550964B (en) * | 2020-04-29 | 2023-10-27 | 珠海格力电器股份有限公司 | Defrosting method, refrigeration equipment, defrosting control method and commercial refrigeration unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201072272Y (en) * | 2007-06-07 | 2008-06-11 | 中国人民解放军总后勤部建筑工程研究所 | Heat pump defrosting control device of cooling and heating blower |
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| CN101660808A (en) | 2010-03-03 |
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