CN102853502B - Defrosting control method of heat pump air conditioner unit - Google Patents
Defrosting control method of heat pump air conditioner unit Download PDFInfo
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Abstract
The invention discloses a defrosting control method of a heat pump air conditioner unit. According to the outdoor environment temperature T4 of heat pump air conditioner operation, regional defrosting is conducted, and different defrosting control modes are conducted within regions of different temperatures. The outdoor environment temperature T4 during initial heat pump air conditioner operation is divided into N regions, different defrosting control methods are used in all regions, a controller is used for counting the air conditioner regional defrosting number when a machine is started up and heated, a special defrosting mode is conducted when the number reaches n, the entry condition of the special defrosting mode is the same as that of regional defrosting modes, and the exit condition is conducted in accordance with different control rules. By the aid of the method, the defrosting is conducted quickly, the indoor temperature fluctuation is small during defrosting, the heating amount is large and the heating can be conducted continuously. Simultaneously, the defects that the defrosting time is long and the defrosting is not complete due to hot gas bypass at the ultralow temperature are avoided. Users feel comfortable.
Description
Technical field
The present invention is a kind of defrosting control method of heat pump air conditioner unit, belongs to the renovation technique of the defrosting control method of heat pump air conditioner unit.
Background technology
Heat pump air conditioner when heating operation in, cold-producing medium is by outdoor heat exchanger and outdoor air generation heat exchange, absorption of air heat and evaporating outdoor, the cold-producing medium of compressor compresses low-temp low-pressure becomes the refrigerant vapour of HTHP, enters indoor heat converter heat release; Release heat by indoor heat converter and carry out heating indoor air, make people enjoy pleasant environment.
Owing to absorbing heat in outdoor heat converter outdoor air, outdoor heat converter environment temperature is lower, and the steam in air can condense into frost and be attached to outdoor heat converter surface, have impact on the exchange capability of heat of outdoor heat converter, the heating capacity of device declines, and affects the comfortableness of people.
In order to solve air-conditioner defrosting problem, current air-conditioner majority adopts cross valve commutation control, cross valve commutation during defrosting, outdoor heat converter heat release, and indoor heat converter absorbs heat, and air-conditioner running refrigerating circulates, and indoor stopping heats, and increases the discomfort of people; Due to the more difficult Ex-all of the frost bottom outdoor heat converter in defrost process, when the first half defrosts complete, must wait until that the defrosting of lower part heat exchanger can enter normal heating operation completely, defrosting time is longer; In addition, current Ye You enterprise adopts cross valve not reverse cycle defrost mode, but it is lower often to there is indoor set wind pushing temperature in defrost process under compared with the environment of low temperature, and defrosting time is long, defrost sordid phenomenon, affect the operation of air-conditioning next cycle, produce vicious circle.
Summary of the invention
The object of the invention is to consider the problems referred to above and a kind of defrosting control method adopting the heat pump air conditioner unit of divisional defrosting pattern is provided.The present invention takes different defrosting modes in different temperature provinces, improves the comfortableness of user.
Technical scheme of the present invention is: the defrosting control method of heat pump air conditioner unit of the present invention, N number of region is divided into according to the outdoor environment temperature of operation of air conditioner, different defrosting control methods is taked in each region, outdoor environment temperature T4 when running initial according to the source pump detected, adopt corresponding defrosting mode, the time t that the condition that control defrost enters is run by air-conditioner set and the temperature difference between outdoor heat exchange organ pipe temperature T3, T5 determine, the condition exiting defrost is determined by outdoor heat exchange organ pipe temperature T5, specifically comprises following concrete steps:
1) compressor start starts heating operation, starts the start-up time calculating compressor;
2) detect outdoor environment temperature T4 during compressor start ta second, program selects according to T4 value the defrost pattern being suitable for correspondence;
3) at the temperature value of t1 to t2 time period T3 when detecting the normal heating operation of compressor start, and the minimum of a value recording t1 to t3 time period T3 is T30;
4) when air-conditioner set t running time reaches the specified operation time t of corresponding subregion
cDtime, sensing chamber external heat exchanger pipe temperature T5, and calculate △ T, wherein △ T=T30-T5;
5) △ T is judged, if when △ T meets the defrost defrosting entry condition of corresponding region defrost pattern, air-conditioner set enters defrost, and defrost action is by the setting of place subregion.The normal heating operation of each compressor start, namely program carries out stored count to subregion defrost number of times, after stored count number of times reaches n time, by special pattern action;
6) defrosting method when defrost pattern in subregion enters defrost, by the setting of each subregion, when defrost starts, starts timing;
7) continuous sensing chamber external heat exchanger pipe temperature T5 when defrost runs, when detecting that temperature conditions T5 is exited in the defrost that T5 meets the corresponding region defrost pattern of setting
cDtime, or detect that defrost reaches setting value t running time
sDtime exit defrost;
8) enter heating operation, restart timing.
Above-mentioned steps 5) defrost action by the setting of place A, B, C, D, E five humidity provinces, specific as follows:
11）T4≥TCD1；
12）TCD2≤T4<TCD1；
13）TCD3≤T4<TCD2；
14）TCD4≤T4<TCD3；
15）T4<TCD4；
T4 is as follows in the pattern of A, B, C, D, E five humidity provinces:
T4 >=7, A district DEG C A pattern
0 DEG C, B district≤T4<7 DEG C B-mode
-5 DEG C, C district≤T4<0 DEG C C mode
-12 DEG C, D district≤T4<-5 DEG C D mode
T4<-12 DEG C, E district E pattern.
Above-mentioned steps 5) the defrosting control method of special pattern comprise following concrete steps:
21) compressor start heating operation, starts counting;
22) after accumulative subregion defrost number of times reaches set point number n, and when air-conditioner set meets the defrost entry condition of place subregion, enter special defrost pattern, defrosting control method is now decided to be the tangential defrost of cross valve;
23) defrost runs and starts namely to start timing, sensing chamber external heat exchanger pipe temperature T3 simultaneously, when detecting that outdoor heat converter T3 rises to higher than TCDE1, or when detecting that outdoor heat converter T3 rises to higher than TCDE2, and when continuing more than tn second, or during defrosting operation continuation tm minute, exit defrost and run; Wherein tn, tm are program setting;
24) complete special pattern defrost, enter heating operation, restart counting;
25) air-conditioner set presses subregion defrost, until accumulative defrost periods enters special pattern defrost after reaching n time, so circulates.
Above-mentioned steps 23) defrost sequence of movement be:
26) compressor frequency reducing runs, and cross valve, inside and outside blower fan are closed;
27) compressor raising frequency is to defrost frequency shelves, enters defrost;
28), after defrost terminates, compressor shutdown, outer blower fan is opened, and after 30 seconds, cross valve, inner blower are opened.
The present invention arranges outdoor environment temperature sensor owing to adopting, different according to the temperature that outdoor environment sensor during air conditioner heat-production is experienced, adopt the method for corresponding divisional defrosting pattern, and count for divisional defrosting number of times, after counting meets the demands, adopt special defrosting mode.The present invention can realize quickly defrosting, and during defrosting, fluctuations in indoor temperature is little, and heating capacity is large, can realize continuing to heat, and avoid again hot gas bypass defrosting to defrost under ultralow temperature for a long time, defrost sordid shortcoming simultaneously, substantially increases the comfortableness that user uses.The present invention is a kind of defrosting control method of convenient and practical heat pump air conditioner unit.
Accompanying drawing explanation
Fig. 1 is defrost schematic diagram;
Fig. 2 is special pattern defrost flow chart;
Fig. 3 is a-quadrant defrost flow chart;
Fig. 4 is B region defrost flow chart;
Fig. 5 is C region defrost flow chart;
Fig. 6 is D region defrost flow chart;
Fig. 7 is E region defrost flow chart.
Detailed description of the invention
Embodiment:
The defrosting control method of heat pump air conditioner unit of the present invention, it is the heat pump air conditioner defrost control mode of a kind of subregion merotype, it is that when running initial by source pump, outdoor environment temperature T4 is divided into N number of region, different defrosting control methods is taked in each region, outdoor environment temperature T4 when running initial according to the source pump detected, adopts corresponding Defrost method.
Source pump opens heating mode, compressor and four-way change-over valve obtain electric, and director demon starts timing, and start to detect starting stage outdoor environment temperature T4, t1-t2 time period outdoor heat converter temperature T3, and record the minimum of a value of t1-t2 time period temperature T3, be recorded as T30; When timing time t reaches corresponding region defrosting mode regulation requirement, sensing chamber outer heat-exchanger temperature T5, and calculate △ T, wherein △ T=T30-T5, if △ T meets corresponding region defrosting mode defrosting entry condition, then enters corresponding region defrosting mode and defrosts, continuous sensing chamber outer heat-exchanger temperature T5 in defrost process, when detecting that temperature conditions is exited in the corresponding region defrosting mode defrosting that T5 meets setting, exiting defrosting mode, entering the next one and heat circulation.
Each start heats Time Controller and counts air-conditioner divisional defrosting number of times, when counting meets n time, adopts special defrosting mode, and special defrosting mode entry condition is identical with divisional defrosting pattern, and exit criteria is by special model program setting.
It is below a kind of divisional defrosting application example.
1, by outdoor environment by being divided into A, B, C, D, E five humidity provinces shown in table 3
Table 3
| outdoor environment temperature Region dividing | t4 | ? |
| a district | t4>=7 DEG C | a pattern |
| b district | 0 DEG C≤T4<7 DEG C | b-mode |
| c district | -5 DEG C≤T4<0 DEG C | c mode |
| d district | -12 DEG C≤T4<-5 DEG C | d mode |
| e district | t4<-12 DEG C | e pattern |
| ? | the outer total temperature regional extent of heating chamber. | special pattern |
Each unlatching heating mode, compressor open, cross valve powers on, and T4 starts to detect outdoor environment temperature, acquiescence compressor open latter 180 seconds time T4 be outdoor environment temperature.According to T4 temperature, be suitable for above corresponding defrost pattern.
Detect also recording compressed machine startup and run 7 minutes to the T3 minimum of a value T30 in 12 minutes continuously.
Sensing chamber outer heat-exchanger temperature T5, and calculate △ T, wherein △ T=T30-T5, according to 2) require that entering each pattern defrosts
2, each pattern entry condition
A pattern:
Defrost entry condition: continuous heating more than tCDA running time minute, and outdoor heat converter T3 lasts more than ta minute lower than T3SD1 continuously.TCDA value 90 minutes, T3SD1 value-3 DEG C, ta value 3 minutes.
B-mode:
Defrost entry condition: continuous heating ran after tCDB minute, and sensing chamber outer heat-exchanger T5, as Δ T(T30-T5) >=T30SUBT5ONE time.TCDB value 25 minutes, T30SUBT5ONE value 5.5 DEG C.
C mode:
Defrost entry condition: continuous heating ran after tCDC minute, and sensing chamber outer heat-exchanger T3, as Δ T(T30-T5) >=T30SUBT5TWO time.TCDC value 30 minutes, T30SUBT5TWO value 5.0 DEG C.
D mode:
Defrost entry condition: continuous heating ran after tCDD minute, and sensing chamber outer heat-exchanger T3, as Δ T(T30-T5) >=T30SUBT5THREE time.TCDD value 35 minutes, T30SUBT5THREE value 5.0 DEG C.
E pattern:
Defrost entry condition: after continuous heating runs tCDE minute, sensing chamber outer heat-exchanger T3≤T3SD2, tCDE value 120 minutes, T3SD2 value-15.0 DEG C.
Special pattern:
Defrost entry condition: statistics A+B+C+D+E reaches n defrost continuously, and spy meets the entry condition of above divisional defrosting pattern arbitrary patterns.
3, defrost termination condition
A pattern
Defrost exit criteria: outdoor heat converter T5 temperature is greater than tSDA higher than T5CDA or defrost continuous working period; T5CDA value 4 DEG C, tSDA value 5 minutes;
B-mode
Defrost exit criteria: outdoor heat converter T5 temperature is greater than tSDB higher than T5CDB or defrost continuous working period; T5CDB value 3.0 DEG C, tSDB value 5 minutes;
C mode
Defrost exit criteria: outdoor heat converter T5 temperature is greater than tSDC higher than T5CDC or defrost continuous working period; T5CDC value 3.0 DEG C, tSDC value 10 minutes;
D mode
Defrost exit criteria: outdoor heat converter T5 temperature is greater than tSDD higher than T5CDD or defrost continuous working period; T5CDD value 2.5 DEG C, tSDD value 10 minutes;
E pattern;
Defrost exit criteria: outdoor heat converter T3 temperature is greater than tSDE higher than T5CDE or defrost continuous working period, T5CDE value 2.0 DEG C, tSDE value 10 minutes;
Special pattern
Defrost exit criteria:
Meet following three terminate defrost first, proceed to common heating:
1. when outdoor heat converter T3 rises to higher than TCDE1, TCDE1 value 18 DEG C;
2. when outdoor heat converter T3 rises to higher than TCDE2, and when continuing more than tn second; TCDE2 value 8.0 DEG C, tn value 80 seconds;
3. as defrosting operation continuation tm minute, tm value 15 minutes.
4, compressor, cross valve, indoor fan, outdoor fan, by-passing valve, electric heater, throttling arrangement defrost operating state under each defrosting mode.
5, concrete steps:
Step 1: compressor start starts heating operation, starts timing;
Step 2: detect outdoor environment temperature T4 when starting latter 180 seconds, judges corresponding defrost pattern according to T4 value;
Step 3: the temperature value detecting compressor start normal heating operation t1 to t2 time period T3, and the minimum of a value recording t1 to t2 time period T3 is T30; T1 value 7 minutes, t2 value 12 minutes;
Step 4: when air-conditioner set t running time reaches the specified operation time t of corresponding subregion
cDtime, sensing chamber external heat exchanger pipe temperature T5, and calculate △ T, wherein △ T=T30-T5;
Step 5: judge that △ T is (with △ T
cDrelatively), if when △ T meets the defrost defrosting entry condition of corresponding region defrost pattern, air-conditioner set enters defrost, defrost action is by the setting of place subregion, if the accumulative defrost periods of counting reaches n(6) secondary after, by special pattern action;
Step 6: defrosting method when entering defrost, by the setting of each subregion, when defrost starts, starts timing;
Step 7: continuous sensing chamber external heat exchanger pipe temperature T5 when defrost runs, when detecting that temperature conditions T5 is exited in the defrost that T5 meets the corresponding region defrost pattern of setting
cDtime, or detect that defrost reaches setting value t running time
sDtime exit defrost process;
Step 8: enter heating operation, restarts timing.
Above-mentioned listed detailed description of the invention is nonrestrictive, and to one skilled in the art, do not departing within scope of the present invention, the various modifications and variations of carrying out, all belong to protection scope of the present invention.
Claims (4)
1. the defrosting control method of a heat pump air conditioner unit, it is characterized in that being divided into N number of region according to the outdoor environment temperature of operation of air conditioner, different defrosting control methods is taked in each region, outdoor environment temperature T4 when running initial according to the source pump detected, adopt corresponding defrosting mode, the time t that the condition that control defrost enters is run by air-conditioner set and the temperature difference between outdoor heat exchange organ pipe temperature T3, T5 determine, the condition exiting defrost is determined by outdoor heat exchange organ pipe temperature T5, specifically comprises following concrete steps:
1) compressor start starts heating operation, starts the start-up time calculating compressor;
2) detect outdoor environment temperature T4 during compressor start ta second, program selects according to T4 value the defrost pattern being suitable for correspondence;
3) at the temperature value of t1 to t2 time period T3 when detecting the normal heating operation of compressor start, and the minimum of a value recording t1 to t3 time period T3 is T30;
4) when air-conditioner set t running time reaches the specified operation time t of corresponding subregion
cDtime, sensing chamber external heat exchanger pipe temperature T5, and calculate △ T, wherein △ T=T30-T5;
5) △ T is judged, if when △ T meets the defrost defrosting entry condition of corresponding region defrost pattern, air-conditioner set enters defrost, and defrost action is by the setting of place subregion;
The normal heating operation of each compressor start, namely program carries out stored count to subregion defrost number of times, after stored count number of times reaches n time, by special pattern action;
6) defrosting method when defrost pattern in subregion enters defrost, by the setting of each subregion, when defrost starts, starts timing;
7) continuous sensing chamber external heat exchanger pipe temperature T5 when defrost runs, when detecting that temperature conditions T5 is exited in the defrost that T5 meets the corresponding region defrost pattern of setting
cDtime, or detect that defrost reaches setting value t running time
sDtime exit defrost;
8) enter heating operation, restart timing.
2. the defrosting control method of heat pump air conditioner unit according to claim 1, is characterized in that above-mentioned steps 5) defrost action by the setting of place A, B, C, D, E five humidity provinces, specific as follows:
11)T4≥TCD1；
12)TCD2≤T4<TCD1；
13)TCD3≤T4<TCD2；
14)TCD4≤T4<TCD3；
15)T4<TCD4；
T4 is as follows in the pattern of A, B, C, D, E five humidity provinces:
T4 >=7, A district DEG C A pattern
0 DEG C, B district≤T4<7 DEG C B-mode
-5 DEG C, C district≤T4<0 DEG C C mode
-12 DEG C, D district≤T4<-5 DEG C D mode
T4<-12 DEG C, E district E pattern.
3. the defrosting control method of heat pump air conditioner unit according to claim 1, is characterized in that above-mentioned steps 5) the defrosting control method of special pattern comprise following concrete steps:
21) compressor start heating operation, starts counting;
22) after accumulative subregion defrost number of times reaches set point number n, and when air-conditioner set meets the defrost entry condition of place subregion, enter special defrost pattern, defrosting control method is now decided to be the tangential defrost of cross valve;
23) defrost runs and starts namely to start timing, sensing chamber external heat exchanger pipe temperature T3 simultaneously, when detecting that outdoor heat converter T3 rises to higher than TCDE1, or when detecting that outdoor heat converter T3 rises to higher than TCDE2, and when continuing more than tn second, or during defrosting operation continuation tm minute, exit defrost and run; Wherein tn, tm are program setting;
24) complete special pattern defrost, enter heating operation, restart counting;
25) air-conditioner set presses subregion defrost, until accumulative defrost periods enters special pattern defrost after reaching n time, so circulates.
4. the defrosting control method of heat pump air conditioner unit according to claim 3, is characterized in that above-mentioned steps 23) defrost sequence of movement be:
26) compressor frequency reducing runs, and cross valve, inside and outside blower fan are closed;
27) compressor raising frequency is to defrost frequency shelves, enters defrost;
28), after defrost terminates, compressor shutdown, outer blower fan is opened, and after 30 seconds, cross valve, inner blower are opened.
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| CN115854491B (en) * | 2022-12-07 | 2024-06-07 | 珠海格力电器股份有限公司 | Defrosting control method and device for air conditioner, air conditioner and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1164006A (en) * | 1996-01-29 | 1997-11-05 | Lg电子株式会社 | Defrosting method for heat pump type air conditioner |
| US7228692B2 (en) * | 2004-02-11 | 2007-06-12 | Carrier Corporation | Defrost mode for HVAC heat pump systems |
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- 2012-09-29 CN CN201210371492.6A patent/CN102853502B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1164006A (en) * | 1996-01-29 | 1997-11-05 | Lg电子株式会社 | Defrosting method for heat pump type air conditioner |
| US7228692B2 (en) * | 2004-02-11 | 2007-06-12 | Carrier Corporation | Defrost mode for HVAC heat pump systems |
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