CN102538126A - Defrosting control method of heat-pump type air conditioner - Google Patents
Defrosting control method of heat-pump type air conditioner Download PDFInfo
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- CN102538126A CN102538126A CN2010106041064A CN201010604106A CN102538126A CN 102538126 A CN102538126 A CN 102538126A CN 2010106041064 A CN2010106041064 A CN 2010106041064A CN 201010604106 A CN201010604106 A CN 201010604106A CN 102538126 A CN102538126 A CN 102538126A
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Abstract
The invention discloses a defrosting control method of a heat-pump type air conditioner. Manual intervention measures aiming at defrosting mode are arranged to prevent false operation, and the defrosting mode of the air conditioner can be intervened manually only in the heating mode and normal operation of the air conditioner. For preventing the false operation made by users in daily air conditioner operation, no special manual intervention key is arranged on an air conditioner remote controller and an air conditioner operation panel, and a manual intervention function is achieved through key combination and seldom-used operation mode combination. The defrosting control method of the heat-pump type air conditioner can avoid false defrosting motion caused by different environment, regions and other factors and can be switched to manual defrosting mode to ensure complete defrosting under the condition that incomplete defrosting is caused by uncertain factors, thereby avoiding vicious circle and improving the heating efficiency of the heat-pump type air conditioner.
Description
Technical field:
The present invention relates to a kind of defrosting control method of heat pump type air conditioner.
Background technology:
In traditional heat pump type air conditioner; Mostly adopt following method defrosting: 1, the indirect determining method of indoor coil pipe " indoor coil pipe rate of change+time method " is judged whether frosting of outdoor heat exchanger; Promptly pass through the rate of change of the inner coil pipe temperature T h of sensing chamber; Cooperation time control again (promptly confirm a minimum running time, prevent frequent defrosting); 2, the coil temperature sensor on the outdoor heat converter is judged the frosting situation of outdoor heat converter.But two kinds of Defrost methods respectively have its region that is suitable for and weather, environment, and certain shortcoming is all arranged under other environmental condition, are difficult to adapt to all environments for use.Mistake defrosting and defrosting situation not to the utmost appear in the capital.Adopt the indirect determining method of indoor coil pipe " temperature difference-time method " to judge whether frosting of outdoor heat exchanger; Depend merely on the indoor coil pipe rate of change as judging frosting whether foundation; Can cause erroneous judgement; Mistake defrosting and situation about not defrosting occur, not defrosting finally causes the frost layer very thick, and defrosting not to the utmost.Because rate of temperature change is influenced by frosting not only only, other many factors also can be influential to rate of change, reduces like refrigerant, and outdoor environment temperature reduces, and the indoor fan air quantity changes, indoor other heating source or the like arranged; Coil temperature sensor on the employing outdoor heat converter is judged the frosting situation of outdoor heat converter, though accuracy is higher under certain environmental condition, along with the variation of environmental condition; Particularly when outdoor environment temperature itself very low, be lower than below 0 ℃, and relative humidity is when also low; Even coil temperature has reached the frosting temperature of setting, but still possibly not reach the air dew point temperature, this moment the fin frost-free; But erroneous judgement is for frosting, so can not reduce False Rate.And withdraw from defrosting according to this coil temperature condition, often cause defrosting unclean again.It is unclean to defrost, and will be directly connected to air-conditioning safety of products and reliable the use.When the frosting of outdoor condenser surface, and the automatic defrosting system of air-conditioning own fails its change is gone, though or change the water-setting that goes to remain on the heat exchanger surface pearl of build-uping ice, yet its change is not gone in next automatic defrosting cycle; Accumulation through after a while forms ice cube at last, and long-pending more thick more.This moment, outdoor fan motor was got on the ice cube as if driving the fan blade rotation, just caused fan blade to fracture easily or motor rotation blockage, and consequence is hardly imaginable, and (behind the motor rotation blockage, electric current increases, and electric machine temperature rise constantly raises; Be prone to cause situation such as short-circuit between conductors and motor burn out having no under protection or the malfunctioning situation of safeguard measure).Because the heat exchanger of air conditioner outdoor unit copper pipe surface is frozen or frosting, heat can not get fully that conversion absorbs, and the pipe temperature will constantly descend, so the complete machine heating performance will weaken greatly, and this moment, compressor load can increase gradually, and influenced service life.And the temperature that indoor set blows out reduces gradually, also can bring uncomfortable impression to the user.
The mistake defrosting has brought the loss of heating capacity and the decline of heating effect; And defrosting can bring bigger hidden danger not to the utmost; Run into defrosting situation not to the utmost, often have only employing that outdoor heat converter is watered boiling water, the methods such as cross valve line, forced refrigeration of extracting solve.And China is vast in territory, and natural climate is various, and it is unavoidable to run into the problems referred to above, so the defrosting problem is a great problem of puzzlement heat pump type air conditioner always.
Summary of the invention:
For overcoming the defective of prior art, the object of the present invention is to provide a kind of defrosting control method of heat pump type air conditioner, multiple Defrost mode is provided: intelligent defrosting, outer dish defrost, manually defrost available; The mistake defrosting action that causes with the difference of avoiding because of factors such as environment, regions; And, guarantee that defrosting is clean owing under the defrosting situation not to the utmost that uncertain factor causes, switch to manual defrosting mode; Avoid vicious circle, improve the heating efficiency of heat pump type air conditioner.
Technical solution problem of the present invention adopts following technical scheme:
A kind of defrosting control method of heat pump type air conditioner, it is 1 that the intelligent defrosting code is set, outer dish defrosting code is 0, and the code that will defrost is sent into memory chip; Defrosting entering pattern is:
A, judge whether air-conditioning is in heating mode and is working;
B, whether select manual intervention;
If the judged result of A, B judges then for being whether manual defrosting finishes again, do not rejudge if finish then to return B; If manually defrosting finishes, then select manually defrosting to get into manually defrosting flow process to manual defrosting again and finish, and read memory chip defrosting code, write 0 and go into memory chip if code is 1; Write 1 and go into memory chip if code is 0;
If the judged result of A be the judged result of B for not, then from memory chip, read the defrosting code, if the defrosting code is 1 and satisfies the intelligent defrosting condition and then begin intelligent defrosting until end; If the defrosting code is 0 judgement not outer dish and whether intact being arranged, then begin defrosting until end if intact outer dish is arranged and satisfy outer dish defrosting condition, is that 1 situation is handled if there is not outer dish according to the defrosting code.
The defrosting control method of heat pump type air conditioner of the present invention, defrosting is withdrawed from pattern and is:
After getting into the defrosting program, outer blower fan, compressor, auxiliary electrical heating are closed, and indoor fan is closed after having blown waste heat, cross TIME1 after second four-way change-over valve close, TIME2 after second compressor open, begin refrigeration, defrost;
A, judgement have not outer dish and whether intact; If, then
B, judge the compression mechanism cool time, if cooling time＜M minute, return and rejudge; If cooling time >=M minute, then
C, judge that whether outer dish temperature continues TIME3 second greater than T ℃, does not rejudge if return again; If then close compressor is opened outdoor fan, cross TIME4 four-way change-over valve unlatching after second, TIME5 is the compressor unlatching after second, and defrosting finishes, and recovers to heat;
If the judged result of D A is then judged the compression mechanism cool time for not, if cooling time＜M1 minute, return and rejudge; If cooling time >=M1 minute, then close compressor was opened outdoor fan, cross TIME4 four-way change-over valve unlatching after second, TIME5 is the compressor unlatching after second, and defrosting finishes, and recovers to heat.
The present invention is provided with the manual intervention measure to Defrost mode.For preventing misoperation, only normally in service at heating mode and air-conditioning, just can carry out manual intervention to the Defrost mode of air-conditioning; Misoperation when preventing user's regular job air-conditioning is not provided with special manual intervention button on air-conditioning remote control or air-conditioning guidance panel, make up with the mode of operation that is of little use through key combination and realize the manual intervention function;
Intelligent defrosting, outer dish defrosting, three kinds of Defrost modes of artificial defrosting are set; And the intelligent defrosting mode is set is code 1, and coiling Defrost mode outward is code 0;
Be defaulted as intelligent defrosting (the 1st kind of common Defrost mode judged whether frosting of outdoor heat exchanger indirectly with the inner coil pipe temperature) when air-conditioning dispatches from the factory or coil Defrost mode outward;
Can select other Defrost mode according to actual defrosting effect then;
When not to the utmost situation of defrosting occurring, switch to manual defrosting mode, after manual defrosting mode defrosting, system automatically switches to the another kind of defrosting mode with respect to defrosting mode before the manual defrosting;
After manual defrosting is set, automatically switch that other plants Defrost mode,, explain that original defrosting mode maybe incompatible weather and relevant environmental factor at this moment since be situation not to the utmost because defrosting has appearred in air-conditioning.Can needing avoid manual work to intervene once more to the full extent;
Be provided with memory chip, can not change to guarantee the set defrosting mode in power failure back.
Compared with present technology, beneficial effect of the present invention is embodied in:
1, the present invention utilizes intelligent defrosting, coils being used in combination of defrosting, manual defrosting mode outward, through the manual intervention means, has effectively avoided intelligent defrosting or coiled outward to defrost being difficult to more adapt to the shortcoming of wider region, natural environment and climate condition.Accomplish applicable each zone of a kind of product, can both accomplish accurate defrosting under the multiple environment.
2, the present invention is owing to be provided with manual defrosting mode; Can solve the defrosting situation not to the utmost that any extreme weather and uncertain factor (as heating the situation that runs into power failure in a period of time or the defrosting) cause; The combination and the switching of three kinds of Defrost modes of the present invention; Really solved in various environment accurately defrosting, defrosting problem has not to the utmost improved the operating efficiency that heats of heat pump type air conditioner.
3, the manual defrosting mode that is provided with among the present invention; Solved and air-conditioner defrosting occurred not to the utmost in the past; During the heating effect difference, need specialized maintenance personnel and the loaded down with trivial details just divisible problem of means, domestic consumer can settle a dispute by the parties concerned themselves through shirtsleeve operation; Reduce the maintenance of factory and sent worker's amount, increased benefit.
Whether have and intact Rule of judgment, increased range of application of the present invention greatly if 4, being provided with the outer dish of judgement sensor in the software of the present invention.
5, the present invention does not change the system architecture and the control circuit of existing fixed speed air conditioner, and the suitable adjustment through software program can realize, and is easy to implement.
Description of drawings:
Fig. 1 is a Defrost mode main control flow chart of the present invention.
The workflow diagram of manual intervention during Fig. 2 controls for the present invention defrosts.
Fig. 3 is the workflow diagram of the manual defrosting mode of the present invention.
Below pass through the specific embodiment, and in conjunction with the accompanying drawings the present invention is described further.
The specific embodiment:
Referring to Fig. 1, during program initialization, the defrosting code of intelligent defrosting is made as 1, the defrosting code of outer dish defrosting is made as 0; When air-conditioner dispatches from the factory; The default setting Defrost mode is that intelligent defrosting or outer dish defrosting are all passable; And corresponding defrosting code 1 or 0 sent into memory chip; Do you air-conditioner when work, judge that earlier (1) air-conditioner is in heating mode and working? If be in heating mode and working, then can carry out manual intervention to Defrost mode.If the result does not then get into following procedure for not.For preventing the manual intervention maloperation, be provided with air-conditioning be in heating mode and can operate as normal as the precondition that whether can carry out manual intervention.In season beyond preventing in the winter time, artificial incorrect operation gets into manual defrosting mode, causes system pressure too high, the infringement system.Is manual intervention carried out in judgement (2) again? Maintenance personal or domestic consumer all can be according to outer machine frosting situation; Defrost mode to air-conditioner carries out manual intervention; Can find out in the aforesaid background technology that intelligent defrosting and outer dish defrosting respectively have pluses and minuses, and the gentle time environment in the work region that oneself is more suitable for is all arranged.Maintenance personal or domestic consumer are according to the guidance of specification, and when the defrosting misoperation appears in air-conditioning, but a kind of defrosting mode that is more suitable for is in addition changed in manual intervention, and to defrosting not to the utmost, the air-conditioning that outer machine heat exchanger has been tied very thick frost manually defrosts.Ran into defrosting situation not to the utmost in the past, and often had only employing that outdoor heat converter is watered boiling water, the methods such as cross valve line, forced refrigeration of extracting solve.The operation of these methods is loaded down with trivial details, and has certain professional and dangerous (as the method for extracting the cross valve line).And manually defrost through the artificial method of intervening of the present invention, then convenient, quick.If do not carry out manual intervention this moment, then read the defrosting code of this moment from memory chip, judge that again (3) defrosting code is 1? If be 1 then the defrosting mode of expression this moment is the intelligent defrosting pattern, if 0 expression is outer dish defrosting mode.Was the beginning condition of intelligent defrosting satisfied in judgement (4) again when the result who judges (3) was 1? If satisfy then defrost, finish up to defrosting, begin to rejudge from (1) again.If judge the ungratified words of result of (4), then go back to (1) and begin to rejudge.If judge that the result of (3) is at 0 o'clock; Do you judge again that then (5) air-conditioner has outer dish sensor and coils intact outward? Intact like outer dish sensor; Then get into outer dish defrosting mode; Do you judge again whether (6) satisfy outer dish defrosting condition? If satisfy the defrosting condition, then begin defrosting, go back to (1) afterwards again and begin to rejudge.If the result who judges (5) for not the time, then goes back to intelligent defrosting.Begin to judge (4).The condition that is provided with judgement (5) is to coil outside under the defrosting mode in order to prevent, owing to not having under the bad situation of outer dish or outer adjustment debit, causing does not defrost or defrost misoperation.Versatility of the present invention is strengthened in the setting of this condition greatly, all can use this program on the air-conditioning of the outer dish that outside being provided with, coils or be not provided with.If the result who judges (6) for not the time, then goes back to (1) and begins to rejudge.
If locate in judgement (2), select to carry out manual intervention, then as shown in Figure 2, judge that (7) manual defrosting finishes? If in manually defrosting, then can not carry out manual intervention.If manually defrosting finishes, then can carry out manual intervention.It is to defrost in manually defrosting in order to prevent that judgement (7) is set, and influence is the effect of defrosting manually.
Misoperation when preventing user's regular job air-conditioning is not provided with special manual intervention button on air-conditioning remote control or air-conditioning guidance panel, make up with the mode of operation that is of little use through key combination and realize the manual intervention function.For example: use operating remote controller, need only under heating mode, in 15 seconds, air-conditioner is received " 30 ℃ of 31 ℃ → design temperatures of design temperature " continuously and is so circulated 3 times, and then air-conditioner gets into the workflow of changing a kind of defrosting mode.Under heating mode, in 15 seconds, air-conditioner is received " 30 ℃ of 31 ℃ → design temperatures of design temperature " continuously and is so circulated 5 times, then gets into manually defrosting flow process.After a kind of defrosting mode workflow is changed in entering; Read the defrosting code in the memory chip earlier; Do you judge that again (8) code is 1? If the result is 1, then code 0 is write memory chip, be 0 like the result; Then code 1 is write memory chip, go back to judgement (1) (shown in Figure 1) then and restart to judge.
After getting into manually the defrosting flow process, as shown in Figure 3, outer blower fan, compressor, auxiliary electrical heating are closed, and close after blowing waste heat in the indoor wind; Cross TIME1 after second four-way change-over valve close, TIME2 after second compressor open, begin refrigeration, defrosting, judge that again (9) have outer dish and intact? If words; Do you judge (10) compressor cooling M minute again? If compressor cooling, then returns (10) less than M minute and rejudges, if compressor cooling is reach M minute; Do you judge that again (11) outer dish temperature continues TIME3 second greater than T ℃? If not, return (11) and rejudge, if words; Then close compressor is opened outdoor fan, crosses TIME4 four-way change-over valve unlatching after second; TIME5 is the compressor unlatching after second, and defrosting finishes, and recovers to heat.If the result who judges (9) judges then that for not (12) compressor cooling reached more than M1 minute? If do not reach M1 minute, then continue to judge (12).If reach more than M1 minute, then close compressor is opened outdoor fan, crosses TIME4 four-way change-over valve unlatching after second, and TIME5 is the compressor unlatching after second, and defrosting finishes, and recovers to heat.After manually defrosting finishes, return the C place of Fig. 2, continue to carry out, change other a kind of Defrost mode.Manually defrosting generally defrosting not to the utmost, have on the outdoor heat exchanger of air conditioner under the situation of thick ice, frost and use.After manual defrosting is set, automatically switch that other plants Defrost mode,, explain that original defrosting mode maybe incompatible weather and relevant environmental factor at this moment since be situation not to the utmost because defrosting has appearred in air-conditioning.Can avoid manual intervention once more to the full extent.
Claims (2)
1. the defrosting control method of a heat pump type air conditioner, it is 1 that the intelligent defrosting code is set, outer dish defrosting code is 0, and the code that will defrost is sent into memory chip; The entering pattern that it is characterized in that defrosting is:
A, judge whether air-conditioning is in heating mode and is working;
B, whether select manual intervention;
If the judged result of A, B judges then for being whether manual defrosting finishes again, do not rejudge if finish then to return B; If manually defrosting finishes, then select manually defrosting to get into manually defrosting flow process to manual defrosting again and finish, and read memory chip defrosting code, write 0 and go into memory chip if code is 1; Write 1 and go into memory chip if code is 0;
If the judged result of A be the judged result of B for not, then from memory chip, read the defrosting code, if the defrosting code is 1 and satisfies the intelligent defrosting condition and then begin intelligent defrosting until end; If the defrosting code is 0 judgement not outer dish and whether intact being arranged, then begin defrosting until end if intact outer dish is arranged and satisfy outer dish defrosting condition, is that 1 situation is handled if there is not outer dish according to the defrosting code.
2. the defrosting control method of a heat pump type air conditioner is characterized in that defrosting withdraws from pattern and be:
After getting into the defrosting program, outer blower fan, compressor, auxiliary electrical heating are closed, and indoor fan is closed after having blown waste heat, cross TIME1 after second four-way change-over valve close, TIME2 after second compressor open, begin refrigeration, defrost;
A, judgement have not outer dish and whether intact; If, then
B, judge the compression mechanism cool time, if cooling time＜M minute, return and rejudge; If cooling time >=M minute, then
C, judge that whether outer dish temperature continues TIME3 second greater than T ℃, does not rejudge if return again; If then close compressor is opened outdoor fan, cross TIME4 four-way change-over valve unlatching after second, TIME5 is the compressor unlatching after second, and defrosting finishes, and recovers to heat;
If the judged result of D A is then judged the compression mechanism cool time for not, if cooling time＜M1 minute, return and rejudge; If cooling time >=M1 minute, then close compressor was opened outdoor fan, cross TIME4 four-way change-over valve unlatching after second, TIME5 is the compressor unlatching after second, and defrosting finishes, and recovers to heat.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010604106.4A CN102538126B (en) | 2010-12-24 | 2010-12-24 | Defrosting control method of heat-pump type air conditioner |
| CN201310354250.0A CN103423838B (en) | 2010-12-24 | 2010-12-24 | A kind of defrosting control method of heat pump type air conditioner |
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| CN201010604106.4A CN102538126B (en) | 2010-12-24 | 2010-12-24 | Defrosting control method of heat-pump type air conditioner |
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| CN201310354250.0A Division CN103423838B (en) | 2010-12-24 | 2010-12-24 | A kind of defrosting control method of heat pump type air conditioner |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836857A (en) * | 2012-11-26 | 2014-06-04 | 浙江盾安人工环境股份有限公司 | Defrosting method of air conditioner |
| CN105980784A (en) * | 2014-03-28 | 2016-09-28 | 江森自控日立空调技术（香港）有限公司 | Air conditioner |
| CN106247568A (en) * | 2016-09-19 | 2016-12-21 | 广东美的制冷设备有限公司 | A kind of air-conditioner wind keeps away people's control method and air-conditioner |
| CN106403179A (en) * | 2016-09-19 | 2017-02-15 | 广东美的制冷设备有限公司 | Control method for preventing air conditioner from blowing air towards people and air conditioner |
| CN106958929A (en) * | 2017-05-17 | 2017-07-18 | 广东美的暖通设备有限公司 | Air-conditioning system and its blower control method |
| CN107143978A (en) * | 2017-05-17 | 2017-09-08 | 广东美的暖通设备有限公司 | Air-conditioning system and its blower control method and device |
| CN110645675A (en) * | 2019-09-23 | 2020-01-03 | 南京天加环境科技有限公司 | Improved defrosting control method for air conditioner |
| CN112050374A (en) * | 2019-06-07 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836857A (en) * | 2012-11-26 | 2014-06-04 | 浙江盾安人工环境股份有限公司 | Defrosting method of air conditioner |
| CN103836857B (en) * | 2012-11-26 | 2018-06-05 | 浙江盾安人工环境股份有限公司 | The Defrost method of air-conditioning |
| CN105980784A (en) * | 2014-03-28 | 2016-09-28 | 江森自控日立空调技术（香港）有限公司 | Air conditioner |
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| CN106247568A (en) * | 2016-09-19 | 2016-12-21 | 广东美的制冷设备有限公司 | A kind of air-conditioner wind keeps away people's control method and air-conditioner |
| CN106403179A (en) * | 2016-09-19 | 2017-02-15 | 广东美的制冷设备有限公司 | Control method for preventing air conditioner from blowing air towards people and air conditioner |
| CN106958929A (en) * | 2017-05-17 | 2017-07-18 | 广东美的暖通设备有限公司 | Air-conditioning system and its blower control method |
| CN107143978A (en) * | 2017-05-17 | 2017-09-08 | 广东美的暖通设备有限公司 | Air-conditioning system and its blower control method and device |
| CN112050374A (en) * | 2019-06-07 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050374B (en) * | 2019-06-07 | 2022-08-19 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN110645675A (en) * | 2019-09-23 | 2020-01-03 | 南京天加环境科技有限公司 | Improved defrosting control method for air conditioner |
| CN110645675B (en) * | 2019-09-23 | 2021-02-02 | 南京天加环境科技有限公司 | Improved defrosting control method for air conditioner |
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