CN102466296A - Defrosting control method applied to heat pump air conditioning unit - Google Patents
Defrosting control method applied to heat pump air conditioning unit Download PDFInfo
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- CN102466296A CN102466296A CN201010539242XA CN201010539242A CN102466296A CN 102466296 A CN102466296 A CN 102466296A CN 201010539242X A CN201010539242X A CN 201010539242XA CN 201010539242 A CN201010539242 A CN 201010539242A CN 102466296 A CN102466296 A CN 102466296A
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- 238000010257 thawing Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004378 air conditioning Methods 0.000 title abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 238000005057 refrigeration Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 230000009466 transformation Effects 0.000 description 6
- 239000000155 melt Substances 0.000 description 2
- 230000002528 anti-freeze Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides a defrosting control method applied to a heat pump air conditioning unit, which solves the problem of discomfort of a user caused by shutdown during defrosting, and avoids the conditions of large energy consumption and incomplete defrosting by a temperature difference control defrosting method due to a time control defrosting method. According to the defrosting control method, after the air conditioner is heated and operated for a period of time, the controller judges and instructs whether to carry out defrosting control according to the temperature difference judgment condition; after the air conditioner enters a defrosting state, the air conditioner is changed from heating operation to cooling operation, at the moment, the inner side of the air conditioner is not stopped, and an indoor auxiliary heating device is started to realize uninterrupted heating; after the air conditioner enters a defrosting control state for a period of time or the temperature difference condition is reduced, the controller instructs to exit the defrosting state; and after the preset time interval, the controller continuously judges whether the air conditioner meets the defrosting condition or not, and the circulation control is carried out. The temperature difference condition refers to the difference value between the outdoor environment and the defrosting entering temperature T when the temperature of the outdoor environment is lower than the set outdoor environment defrosting entering temperature T.
Description
Technical field
The invention belongs to the antifreeze defrosting automation field of air-conditioner technical field, relate in particular to a kind of defrosting control method that is applied to the heat pump air conditioner unit.
Background technology
Air-conditioning is when heating, and the indoor temperature is high, and the outside temperature is low.Because the temperature of outside evaporimeter descends, and condensation water can occur at fin, frosting when winter, operation heated, also might be frozen, and can make heat exchanger channels stop up, and causes the heating effect difference even not heat.Therefore air-conditioning heats when winter or temperature are low, need defrost.
The most frequently used control method has two kinds now.
A kind of method is to heat the defrost that brings into operation of back one time (empirical value) in operation, heats the cold pattern of the transformation of ownership, and indoor set is shut down; Outer machine heat exchanger temperature raises, and melts frosting, and this is a kind of the simplest defrosting control method; Implement very simple, but it has limitation because under the low situation of air humidity; There is not frosting on the heat exchanger of outer machine at all; The varying environment that can not adapt to different regions, regularly heat the cold energy that also can labor of the transformation of ownership, and shut down the comfortableness that can influence the user;
A kind of in addition method is to control defrost according to the temperature difference of the refrigerant in outside environment temperature and the heat exchanger, and under the normal condition, both temperature are consistent basically; Under the situation of outdoor heat exchanger surface frosting, the heat exchange variation, it is big that outside environment temperature and heat exchanger surface temperature-difference become; The defrost controller begins defrost, heats the cold pattern of the transformation of ownership, and indoor set is shut down; Outer machine heat exchanger temperature raises, and melts frosting, and this method can adapt to the varying environment of different regions; But the scope of the temperature difference is difficult predetermined, might have the halfway problem of defrost.
Summary of the invention
The object of the present invention is to provide a kind of defrosting control method that is applied to the heat pump air conditioner unit; Shutdown causes the uncomfortable problem of user during having solved defrost, avoids because time control defrosting method causes energy resource consumption to reach the halfway situation of temperature difference control defrosting method defrost greatly.
The present invention realizes through following technical scheme:
A kind of defrosting control method that is applied to the heat pump air conditioner unit, wherein, after operation a period of time, controller is according to judging whether temperature difference condition judgment and instruction carry out defrost control at air conditioner heat-production; After air-conditioner got into defrost control, air-conditioner changed refrigerating operaton into by heating operation, and this moment, did not shut down the air conditioner chamber inboard, and assisted heating device in the opening chamber is realized continuously heating; Get into the defrost state of a control when reaching the scheduled time or heat exchanger surface temperature and reaching predetermined value at air-conditioner, the defrost state is withdrawed from the controller instruction; Controller at the fixed time at interval after, continue to judge whether air-conditioner satisfies defrost condition, loop control.
Said temperature difference condition refers to that outdoor environment defrost that the temperature of outdoor environment is lower than setting gets into temperature T the two difference when outer.
Beneficial effect of the present invention is following:
A kind of defrosting control method that is applied to the heat pump air conditioner unit of the present invention is because after air conditioner heat-production moved a period of time, controller was according to judging whether temperature difference condition judgment and instruction carry out defrost control; After air-conditioner got into the defrost state, air-conditioner changed refrigerating operaton into by heating operation, and this moment, did not shut down the air conditioner chamber inboard, and assisted heating device in the opening chamber is realized continuously heating; Get into the defrost state of a control after a period of time or temperature difference condition when diminishing at air-conditioner, the defrost state is withdrawed from the controller instruction; Controller at the fixed time at interval after, continue to judge whether air-conditioner satisfies defrost condition, loop control.Said temperature difference condition refers to that outdoor environment defrost that the temperature of outdoor environment is lower than setting gets into temperature T the two difference when outer.
Two kinds of control methods of the comprehensive prior art of the present invention, after air conditioner heat-production operation a period of time, according to judging that temperature difference condition controls defrost, defrost heat the transformation of ownership cold after, does not shut down the indoor, auxilliary heat opening chamber in, realization continuously heating.After defrost a period of time or after the raising of outdoor heat exchanger surface temperature, withdraw from defrost, over time, continue to judge the defrost condition, temperature difference condition and time can be regulated through dial-up, can adapt to the demands of different of different regions environment.Can realize uninterrupted heat supply during the defrost, save the energy, better adapt to the environment of different regions, defrost is thoroughly clean more.
Description of drawings
Fig. 1 is a kind of schematic flow sheet that is applied to the defrosting control method of heat pump air conditioner unit of the present invention.
Among the figure:
T
Outward---the outdoor environment defrost gets into temperature value;
T
Table 1---get into defrost heat exchanger surface desired temperature;
T
Table 2---withdraw from defrost heat exchanger surface desired temperature;
t
1---the predetermined amount of time of compressor operating;
t
2---air-conditioner gets into the predetermined amount of time of defrost state operation.
The specific embodiment
The invention discloses a kind of defrosting control method that is applied to the heat pump air conditioner unit, wherein, after operation a period of time, controller is according to judging whether temperature difference condition judgment and instruction carry out defrost control at air conditioner heat-production; After air-conditioner got into the defrost state, air-conditioner changed refrigerating operaton into by heating operation, and this moment, did not shut down the air conditioner chamber inboard, and assisted heating device in the opening chamber is realized continuously heating; Get into the defrost state of a control at air-conditioner and reach predetermined amount of time t
2, perhaps the heat exchanger surface temperature is greater than withdrawing from defrost heat exchanger surface desired temperature T
Table 2The time, the defrost state is withdrawed from the controller instruction; Controller at the fixed time at interval after, continue to judge whether air-conditioner satisfies defrost condition, loop control.
Said temperature difference condition refers to that the temperature of outdoor environment is lower than the outdoor environment defrost entering temperature T of setting
OutwardThe difference of Shi Erzhe.
Subordinate list 1 is the defrost desired parameters, is set with air-conditioner defrost setup parameter in the said controller, and said air-conditioner defrost setup parameter one has eight groups, sets through the dial-up regulative mode; Comprise:
| Dial-up | 000 | 001 | 010 | 011 | 100 | 101 | 110 | 111 |
| T Outward | A1 | B1 | C1 | D1 | E1 | F1 | G1 | H1 |
| T Table 1 | A2 | B2 | C2 | D2 | E2 | F2 | G2 | H2 |
| T Table 2 | A3 | B3 | C3 | D3 | E3 | F3 | G3 | H3 |
| t 1 | A4 | B4 | C4 | D4 | E4 | F4 | G4 | H4 |
| t 2 | A5 | B5 | C5 | D5 | E5 | F5 | G5 | H5 |
Subordinate list 1 is selected the defrost parameter through dial-up
Wherein:
T
Outward---the outdoor environment defrost gets into temperature value;
T
Table 1---get into defrost heat exchanger surface desired temperature;
T
Table 2---withdraw from defrost heat exchanger surface desired temperature;
t
1---the predetermined amount of time of compressor operating;
t
2---air-conditioner gets into the predetermined amount of time of defrost state operation;
A1～H5---the defrost parameter of correspondence under each dial-up mode.
Simulate the working environment (humidity of the different regions of air-conditioning unit in the development phase; Temperature), each corresponding a kind of dial-up mode in area, every kind of corresponding one group of defrost parameter of dial-up mode; Air-conditioning can be confirmed the defrost condition that the different regions needs are selected, pre-set dial-up mode according to experimental data.
Like Fig. 1, said defrosting control method comprises following concrete steps:
Step S1: select air-conditioner defrost setup parameter, get into step S2;
Step S2: controller judges that whether heating mode moves air-conditioner, gets into step S4, in this way as not getting into step S3;
Step S3: air-conditioner refrigeration mode operation;
Step S4: controller judges whether the temperature of outdoor environment is lower than the outdoor environment defrost entering temperature T of setting
Outward, get into step S5 in this way, as otherwise continue step S4;
Step S5: controller judges whether compressor operating time reaches the predetermined amount of time t of compressor operating
1, get into step S6 in this way, as otherwise continue step S5;
Step S6: controller judges whether the heat exchanger surface temperature is lower than entering defrost heat exchanger surface desired temperature T
Table 1, get into step S7 in this way, as otherwise continue step S6;
Step S7: the air-conditioner defrost pattern that brings into operation, controller output cross valve break-in signal, air-conditioner changes the refrigeration mode operation into by heating, and opens the auxiliary electric heater unit of indoor set; Controller judges whether to satisfy step S8 or step S9 condition;
Step S8: controller judges whether air-conditioner operation defrost mode time gets into the predetermined amount of time t of defrost state operation greater than air-conditioner
2, step S10 as not getting into step S7, continues operation defrost pattern in this way;
Step S9: controller judges that whether the heat exchanger surface temperature is greater than withdrawing from defrost heat exchanger surface desired temperature T
Table 2, get into step S10 in this way, as not getting into step S7, continue operation defrost pattern;
Step S10: the compressor operating time zero clearing, get back to step S2 air-conditioner and get into the heating mode operation.
Among the above-mentioned steps S2, the message that controller is sent according to manual operator judges that it still is heating mode or shutdown mode that air-conditioner gets into refrigeration mode, does not carry out defrost during the air-conditioner refrigerating operaton.
Among the above-mentioned steps S10, controller is exported cross valve break-in signal once more, and air-conditioner changes the heating mode operation into by refrigeration.
When the defrost controller is received heating mode, begin to judge whether the temperature of external environment is lower than the outdoor environment defrost entering temperature T of setting
Outward(when the external environment temperature is high, though be to heat, not necessarily can frosting), after satisfying this condition, system can judge whether compressor has moved the predetermined amount of time t of compressor operating
1After the t1 time arrived, the defrost controller thought that heat exchanger surface might frosting.Judge then whether the heat exchanger surface temperature is lower than entering defrost heat exchanger surface desired temperature T
Table 1, when less than T
Table 1The time, this moment, the defrost controller can be thought heat exchanger surface frosting, the defrost that brings into operation, and output cross valve signal, it is cold to heat the transformation of ownership, and open the auxiliary electrical heating of indoor set, to guarantee the comfortableness of indoor environment in order to guarantee the comfort level of indoor environment this moment.
Defrost has moved air-conditioner and has got into the predetermined amount of time t of defrost state operation
2After, perhaps the heat exchanger surface temperature is greater than withdrawing from defrost heat exchanger surface desired temperature T
Table 2After, withdrawing from the defrost operation, hot cold transformation of ownership heat with the compressor operating time zero clearing, restarts to judge whether defrost needs operation (seeing accompanying drawing 1).Pass through t
2And T
Table 2Judge in the time of two parameters; Satisfy one of which and just can withdraw from the defrost operation, reduced downtime so significantly (having contrasted time control defrost mode), can reach the requirement of saving the energy; According to the defrost of surface cooler surface temperature; In fact be exactly the combination of temperature difference control defrost (being regarded as constant in external environment temperature a period of time) and two kinds of methods of time control defrost, can combine both advantages, defrost is cleaner.
Heat exchanger described in the present embodiment is the outdoor heat exchanger of air-conditioner.
Above-mentioned listed concrete implementation is nonrestrictive, to one skilled in the art, is not departing from the scope of the invention, and various improvement and the variation carried out all belong to protection scope of the present invention.
Claims (7)
1. defrosting control method that is applied to the heat pump air conditioner unit is characterized in that: after operation a period of time, controller is according to judging whether temperature difference condition judgment and instruction are carried out defrost and controlled at air conditioner heat-production; After air-conditioner got into defrost control, air-conditioner changed refrigerating operaton into by heating operation, and this moment, assisted heating device in the opening chamber was not shut down in the air conditioner chamber inboard; Get into the defrost state of a control when reaching the scheduled time or heat exchanger surface temperature and reaching setting value at air-conditioner, the defrost state is withdrawed from the controller instruction; Controller at the fixed time at interval after, continue to judge whether air-conditioner satisfies defrost condition, loop control.
2. a kind of defrosting control method that is applied to the heat pump air conditioner unit as claimed in claim 1 is characterized in that: said temperature difference condition refers to that the temperature of outdoor environment is lower than the outdoor environment defrost entering temperature T of setting
OutwardThe difference of Shi Erzhe.
3. a kind of defrosting control method that is applied to the heat pump air conditioner unit as claimed in claim 2; It is characterized in that: be set with air-conditioner defrost setup parameter in the said controller; Said air-conditioner defrost setup parameter one has eight groups, sets through the dial-up regulative mode; Comprise:
Subordinate list 1 is selected the defrost parameter through dial-up
Wherein:
T
Outward---the outdoor environment defrost gets into temperature value;
T
Table 1---get into defrost heat exchanger surface desired temperature;
T
Table 2---withdraw from defrost heat exchanger surface desired temperature;
t
1---the predetermined amount of time of compressor operating;
t
2---air-conditioner gets into the predetermined amount of time of defrost state operation.
4. a kind of defrosting control method that is applied to the heat pump air conditioner unit as claimed in claim 3 is characterized in that: comprise following concrete steps:
Step S1: select air-conditioner defrost setup parameter, get into step S2;
Step S2: controller judges that whether heating mode moves air-conditioner, gets into step S4, in this way as not getting into step S3;
Step S3: air-conditioner refrigeration mode operation;
Step S4: controller judges whether the temperature of outdoor environment is lower than the outdoor environment defrost entering temperature T of setting
Outward, get into step S5 in this way, as otherwise continue step S4;
Step S5: controller judges whether compressor operating time reaches the predetermined amount of time t of compressor operating
1, get into step S6 in this way, as otherwise continue step S5;
Step S6: controller judges whether the heat exchanger surface temperature is lower than entering defrost heat exchanger surface desired temperature T
Table 1, get into step S7 in this way, as otherwise continue step S6;
Step S7: the air-conditioner defrost pattern that brings into operation, controller output cross valve break-in signal, air-conditioner changes the refrigeration mode operation into by heating, and opens the auxiliary electric heater unit of indoor set; Controller judges whether to satisfy step S8 or step S9 condition;
Step S8: controller judges whether air-conditioner operation defrost mode time gets into the predetermined amount of time t of defrost state operation greater than air-conditioner
2, step S10 as not getting into step S7, continues operation defrost pattern in this way;
Step S9: controller judges that whether the heat exchanger surface temperature is greater than withdrawing from defrost heat exchanger surface desired temperature T
Table 2, get into step S10 in this way, as not getting into step S7, continue operation defrost pattern;
Step S10: the compressor operating time zero clearing, get back to step S2 air-conditioner and get into the heating mode operation.
5. a kind of defrosting control method that is applied to the heat pump air conditioner unit as claimed in claim 4; It is characterized in that: among the said step S2; The message that controller is sent according to manual operator judges that it still is heating mode or shutdown mode that air-conditioner gets into refrigeration mode, does not carry out defrost during the air-conditioner refrigerating operaton.
6. a kind of defrosting control method that is applied to the heat pump air conditioner unit as claimed in claim 4 is characterized in that: among the said step S10, controller is exported cross valve break-in signal once more, and air-conditioner changes the heating mode operation into by refrigeration.
7. a kind of defrosting control method that is applied to the heat pump air conditioner unit as claimed in claim 1 is characterized in that: said heat exchanger is air conditioner chamber's external heat exchanger.
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| CN201010539242XA CN102466296B (en) | 2010-11-10 | 2010-11-10 | Defrosting control method applied to heat pump air conditioning unit |
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| CN201010539242XA CN102466296B (en) | 2010-11-10 | 2010-11-10 | Defrosting control method applied to heat pump air conditioning unit |
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| CN102466296B CN102466296B (en) | 2013-11-20 |
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