CN102901182A - Defrosting method and system for air conditioner - Google Patents
Defrosting method and system for air conditioner Download PDFInfo
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- CN102901182A CN102901182A CN2012103935011A CN201210393501A CN102901182A CN 102901182 A CN102901182 A CN 102901182A CN 2012103935011 A CN2012103935011 A CN 2012103935011A CN 201210393501 A CN201210393501 A CN 201210393501A CN 102901182 A CN102901182 A CN 102901182A
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Abstract
The invention discloses a defrosting method and a defrosting system for an air conditioner. The defrosting method comprises the following steps of: 10, electrifying the air conditioner for running and heating; 20, judging, namely (A) judging whether the outdoor environmental temperature is smaller than and equal to first preset temperature, (B) judging whether continuous running time of a heating compressor reaches first preset time, and judging whether accumulative running time reaches second preset time, (C) judging whether the continuous running time of the heating compressor reaches third preset time, and making accumulative running time reach fourth preset time, (D) judging whether the temperature of a defrosting sensor Te or Tc is smaller tan and equal to second preset temperature, keeping the temperature for fifth preset time, and making the accumulative running time reach fifth preset time, and (E) judging whether to defrost manually; and 30, determine to perform timing defrost, automatically defrost, manually defrost or not defrost according to a judging result obtained in the step 20. By the scheme, the problems that when the air conditioner is used for heating, a heating effect is influenced due to a relatively long defrosting period, and the air conditioner cannot defrost, or defrosts after a long time because the environmental temperature is relatively low can be solved.
Description
Technical field
The present invention relates to a kind of Defrost method and defrost system thereof, more specifically, relate to a kind of Defrost method and defrost system thereof of air-conditioning.
Background technology
Air-conditioning is when heating operation, frosting on condenser but do not reach at short notice the defrosting condition, perhaps air-conditioning is when low temperature environment heats, in the time of namely below 7 ℃, air-conditioning does not enter again defrosting or the long period just enters defrosting, at this moment, because the condenser frosting is thicker, the heat transfer effect of condenser is relatively poor, and it is uncomfortable that the people can feel.
Generally adopt the defrosting sensor to control for prior art, after the defrosting sensor reached the temperature value of regulation, machine entered defrosting.Control air-conditioner defrosting with the defrosting sensor, the inaccurate situation of following several control can occur:
1, the defrosting resistance of sensor is inaccurate or break down, and air-conditioning will occur does not have frosting and defrost, and this situation is false defrosting phenomenon, or the very thick and situation about not defrosting of air-conditioning frosting.
2, in the situation that environment temperature is not too low but humidity ratio is larger, the condenser frosting, but the temperature that the defrosting sensor detects does not reach the defrosting condition, and air-conditioning does not defrost.
3, in the situation that environment temperature is very low but humidity is smaller, when condenser does not have frosting, but the temperature that the defrosting sensor detects reaches the defrosting condition, and air-conditioning carries out vacation and defrosts.
Based on foregoing description, need badly and want a kind of rational Defrost method, in order to solve air-conditioning when heating, defrosting cycle is longer, affect heating effect, the resistance of sensor that perhaps defrosts is inaccurate or when breaking down, and air-conditioning occurring does not have frosting and defrost or the very thick and situation about not defrosting of air-conditioning frosting, and environment temperature is lower, and air-conditioning does not enter defrosting or the long period just enters the problem of defrosting.
Summary of the invention
For addressing the above problem, the object of the present invention is to provide a kind of Defrost method and defrost system thereof of air-conditioning, the method can manually defrost, time defrosting or automatic defrosting, solve air-conditioning when heating, defrosting cycle is longer, affect heating effect, the resistance of sensor that perhaps defrosts is inaccurate or when breaking down, air-conditioning occurring does not have frosting and defrosts or the very thick and situation about not defrosting of air-conditioning frosting, and environment temperature is lower, air-conditioning does not enter defrosting or the long period just enters the problem of defrosting, can improve heating effect.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of Defrost method of air-conditioning may further comprise the steps:
S10: the power-on of air conditioner operation heats;
S20: carry out following 5 kinds of judgements:
A, judge that whether outdoor environment temperature is less than or equal to the first preset temperature;
B, judgement heat the compressor continuous operation time and whether arrive the first preset time, and whether the running cumulative time arrives the second preset time;
C, judgement heat the compressor continuous operation time and whether arrive the 3rd preset time, and running is accumulated to the 4th preset time;
D, judge defrosting sensor Te or Tc temperature whether less than or equal to the second preset temperature, and to continue the 5th preset time, duration of runs accumulative total be the 5th preset time;
E, whether select manual defrosting;
S30: decide according to the judged result of S20 to enter following which kind of defrosting mode,
If the judged result of A is yes, and the judged result of B is yes, then judges whether manually defrosting, if do not have, then enters the time defrosting process;
If the judged result of C is yes, and the judged result of D is yes, then judges whether manually defrosting, if do not have, then enters the automatic defrosting process;
If the judged result of E is yes, then enter manual defrost process;
If above-mentioned condition does not satisfy, then do not defrost.
As preferably, the value of the first preset temperature is 7 ℃; The value of the first preset time is 10min, and the value of the second preset time is 50min.
As preferably, the value of the 3rd preset time is 10min, and the value of the 4th preset time is 45min; The value of the second preset temperature is-15 ℃, and the value of the 5th preset time is 5min, and the value of the 5th preset time is 90min.
As preferably, the exit criteria of time defrosting pattern is: after reaching the fixed value that pre-sets when defrosting time, stop defrosting.
As preferably, the exit criteria of automatic defrosting pattern is: judge the temperature of defrosting sensor, if temperature greater than 7 ℃, and the cumulative time surpass 60s, or reach 12 ℃ of accumulative total 30s, stop defrosting.
As preferably, manually the exit criteria of defrosting mode is: defrosting sensor Te or Tc have a temperature to reach to continue more than 12 ℃ 1min or defrosting time greater than 10min, stop defrosting.
As preferably, in manual defrosting mode, indoor set sends by remote control mode and forces the defrosting signal.
As preferably, in manual defrosting mode, indoor set sends by the line traffic control mode and forces the defrosting signal.
A kind of air conditioner defrosting system, it comprises:
Temperature detecting unit comprises the outdoor ring temperature sensor that detects ambient temperature, and detects the temperature sensor of off-premises station heat exchanger frosting situation;
Time calculating unit calculates the time and the running cumulative time that heat the compressor continuous operation, and detected value is placed in the memory;
Main control unit, the data that the data that temperature detecting unit is detected and time calculating unit detect are resolved, and analysis result is sent to the defrosting mode selected cell with the form of signal;
The defrosting mode selected cell carries out the selection of defrosting mode according to the analysis result of main control unit and the pressure defrosting signal of the indoor set transmission that receives.
As preferably, the temperature sensor that detects off-premises station heat exchanger frosting situation is divided into condensation temperature sensor Tc and defrosting temperature sensor Te.
Beneficial effect of the present invention is, because the present invention can realize manual Defrost mode, time defrosting mode or automatic defrosting mode, so can be according to the external environment needs, select different Defrost modes, and when not reaching time defrosting and automatic defrosting condition, can manually defrost at any time, so can make defrosting more reasonable, more convenient, finally reach comfortable heating effect.When frosting on the condenser but when not reaching at short notice the defrosting condition, can by the measure of hand-operated forced defrosting, reach the purpose of improving heating effect.When air-conditioning heated at low temperature environment, in the time of namely below 7 ℃, air-conditioning did not enter again defrosting or the long period just enters when defrosting, and can by the measure of time defrosting, reach the purpose of improving heating effect.When manually defrosting, with the judgement that defrosts of two sensors, namely condensation temperature sensor Tc or defrosting temperature sensor Te have a temperature to reach to continue more than 12 ℃ 1min or defrosting time greater than 10min, stop defrosting.With the judgement that defrosts of two sensors, avoid inaccurate because of resistance or the bad detection mistake that causes of sensor herein, be equivalent to increase reliability.And when manually defrosting, can be by the control that defrosts of remote control mode or the external machine of line traffic control mode, more convenient.
Description of drawings
Fig. 1 is the control flow chart of a kind of embodiment provided by the invention;
Fig. 2 is the structured flowchart of air conditioner defrosting system provided by the invention.
The specific embodiment
Further specify technical scheme of the present invention below in conjunction with accompanying drawing and by the specific embodiment.
Fig. 1 is the control flow chart of a kind of embodiment provided by the invention.The Defrost method of this air-conditioning may further comprise the steps:
S10: the power-on of air conditioner operation heats;
S20: carry out following 5 kinds of judgements:
A, judge that whether outdoor environment temperature is less than or equal to 7 ℃;
B, judgement heat the compressor continuous operation time and whether arrive 10min, and whether the running cumulative time arrives 50min;
C, judgement heat the compressor continuous operation time and whether arrive 10min, and running is accumulated to 45min;
D, judge defrosting sensor Te or Tc temperature whether less than or equal to-15 ℃, and lasting 5min, the duration of runs, accumulative total was 90min;
E, whether select manual defrosting;
S30: decide according to the judged result of S20 to enter following which kind of defrosting mode,
If the judged result of A is yes, and the judged result of B is yes, then judges whether manually defrosting, if do not have, then enters the time defrosting process;
If the judged result of C is yes, and the judged result of D is yes, then judges whether manually defrosting, if do not have, then enters the automatic defrosting process;
If the judged result of E is yes, then enter manual defrost process;
If above-mentioned condition does not satisfy, then do not defrost.
Concrete, manually the beginning condition of defrosting is: off-premises station beginning to force the defrosting running after heating and (comprising temperature detector OFF) in the running and receive the pressure defrosting signal that indoor set sends.Indoor set forces the defrosting signal to send by remote control mode and line traffic control mode dual mode.
Remote control mode is: off-premises station heat or stopped status under, set high wind, 30 ℃, press sleep key 6 times, buzzer rings 3, enters manual defrosting, Defrost mode is identical with generally Defrost mode.
The line traffic control mode is: after receiving line control machine pressure defrosting signal, enter defrosting.
In the situation that the off-premises station press is not opened, still can enter manual defrosting, but will follow the rule that press was shut down in 3 minutes.
Manually the defrosting termination condition is: condensation temperature sensor Tc or defrosting temperature sensor Te have a temperature to reach to continue more than 12 ℃ 1min or defrosting time greater than 10min, stop defrosting.With the judgement that defrosts of two sensors, avoid inaccurate because of resistance or the bad detection mistake that causes of sensor herein, be equivalent to increase reliability.The manual defrosting signal of indoor set remains into always to be eliminated after off-premises station enters defrosting.
Concrete, time defrosting control needs to arrange by outer machine computer board dial-up, after the power-on of air conditioner operation heats, namely enters the time defrosting pattern.Store outdoor environment temperature in the memory, when outdoor environment temperature is lower than 7 ℃, work by following time defrosting mode: heat compressor continuous operation 10min(value and be placed in the memory) and running accumulative total 50min (value is placed in the memory) after, then entering the defrosting running.After reaching the fixed value that pre-sets when defrosting time, withdraw from the time defrosting mode.
Concrete, the automatic defrosting condition of beginning is:
Behind thermocompressor continuous operation 10min and the running accumulative total 45min, detect the frosting situation of off-premises station heat exchanger by detecting condensation temperature sensor Tc or defrosting temperature sensor Te() and outdoor ring temperature sensor TA, when 5min meets the following conditions continuously, enter the defrosting running:
Te≤C * TA-α or Tc≤C * TA-α
Prevent that because cold medium shortage or other reasons cause uneven not the defrosting of causing of separatory, two entry conditions are as long as one is satisfied and just can enter defrosting.
Wherein: C:TA＜0 ℃, C=0.8 TA 〉=0 ℃, C=0.6
Select to be set as follows according to selector switch SW2: the place in easy frosting, be set as H, be set as M when dispatching from the factory.
| Jumper is selected | The M(factory setting) | H |
| α(℃) | 8(E) | 6(E) |
Defrosting enter temperature limiting 1:-15 ℃≤C * TA-α≤-2 ℃
Defrosting enter temperature limiting 2:C * TA-α＜-15 ℃
Satisfy sensor Te≤-15 ℃ lasting 5min, duration of runs accumulative total 90min and enter defrosting.
After the defrosting running beginning, finish through the longest 10min running.Detect off-premises station heat exchanger defrosting situation by Te, this temperature surpassed 60s or reaches 12 ℃ of accumulative total 30s in the cumulative time more than 7 ℃, finished the defrosting running.
Fig. 2 is the structured flowchart of air conditioner defrosting system provided by the invention, and defrost system comprises temperature detecting unit, time calculating unit, main control unit and defrosting mode selected cell thereof.
Temperature detecting unit is used for detecting extraneous environment temperature and off-premises station heat exchanger frosting situation, this unit comprises outdoor ring temperature sensor TA, condensation temperature sensor Tc or defrosting temperature sensor Te, wherein outdoor ring temperature sensor TA is used for detecting extraneous environment temperature, and condensation temperature sensor Tc or defrosting temperature sensor Te are used for detecting off-premises station heat exchanger frosting situation.With the judgement that defrosts of two sensors, avoid inaccurate because of resistance or the bad detection mistake that causes of sensor herein, be equivalent to increase reliability.The manual defrosting signal of indoor set remains into always to be eliminated after off-premises station enters defrosting.
Time calculating unit is used for calculating time and the running cumulative time that heats the compressor continuous operation, concrete, the accumulation of described compressor can utilize in the air-conditioning system CPU in the master board to carry out timing in the control compressor operation and realize the duration of runs, and detected value is placed in the memory.
The data that the data that main control unit detects temperature detecting unit and time calculating unit detect are resolved, to select the CPU(full name be Central Processing Unit to main control unit in the present embodiment, central processing unit namely), main control unit also can be the ARM embedded system, perhaps DSP etc.After main control unit is resolved data, and analysis result sent to the defrosting mode selected cell with the form of signal.
The defrosting mode selected cell carries out the selection of defrosting mode according to the analysis result of main control unit, if analysis result, then sends the time defrosting instruction for carrying out time defrosting to the defrosting performance element, the heat exchanger in the off-premises station is carried out time defrosting; If analysis result is automatic defrosting, then send the automatic defrosting instruction to the defrosting performance element, the heat exchanger in the off-premises station is carried out automatic defrosting.In this simultaneously, the defrosting mode selected cell also receives the pressure defrosting signal that indoor set sends, indoor set forces the defrosting signal to send by remote control mode and line traffic control mode dual mode, after receiving the pressure defrosting signal that indoor set sends, and manually defrosting running of beginning.Can manually defrost by manually-operated at any time, very convenient.
Know-why of the present invention has below been described in conjunction with specific embodiments.These are described just in order to explain principle of the present invention, and can not be interpreted as by any way limiting the scope of the invention.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other specific embodiment of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (10)
1. the Defrost method of an air-conditioning is characterized in that, may further comprise the steps:
S10: the power-on of air conditioner operation heats;
S20: carry out following 5 kinds of judgements:
A, judge that whether outdoor environment temperature is less than or equal to the first preset temperature;
B, judgement heat the compressor continuous operation time and whether arrive the first preset time, and whether the running cumulative time arrives the second preset time;
C, judgement heat the compressor continuous operation time and whether arrive the 3rd preset time, and running is accumulated to the 4th preset time;
D, judge defrosting sensor Te or Tc temperature whether less than or equal to the second preset temperature, and to continue the 5th preset time, duration of runs accumulative total be the 5th preset time;
E, whether select manual defrosting;
S30: decide according to the judged result of S20 to enter following which kind of defrosting mode,
If the judged result of A is yes, and the judged result of B is yes, then judges whether manually defrosting, if do not have, then enters the time defrosting process;
If the judged result of C is yes, and the judged result of D is yes, then judges whether manually defrosting, if do not have, then enters the automatic defrosting process;
If the judged result of E is yes, then enter manual defrost process;
If above-mentioned condition does not satisfy, then do not defrost.
2. the Defrost method of air-conditioning according to claim 1 is characterized in that, the value of the first preset temperature is 7 ℃; The value of the first preset time is 10min, and the value of the second preset time is 50min.
3. the Defrost method of air-conditioning according to claim 1 is characterized in that, the value of the 3rd preset time is 10min, and the value of the 4th preset time is 45min; The value of the second preset temperature is-15 ℃, and the value of the 5th preset time is 5min, and the value of the 5th preset time is 90min.
4. according to claim 1 to the Defrost method of 3 each described air-conditionings, it is characterized in that, the exit criteria of time defrosting pattern is: after reaching the fixed value that pre-sets when defrosting time, stop defrosting.
5. according to claim 1 to the Defrost method of 3 each described air-conditionings, it is characterized in that, the exit criteria of automatic defrosting pattern is: the temperature of judging the defrosting sensor, if temperature is greater than 7 ℃, and the cumulative time surpasses 60s, or reaches 12 ℃ of accumulative total 30s, stops defrosting.
6. according to claim 1 to the Defrost method of 3 each described air-conditionings, it is characterized in that, manually the exit criteria of defrosting mode is: defrosting sensor Te or Tc have a temperature to reach to continue more than 12 ℃ 1min or defrosting time greater than 10min, stop defrosting.
7. according to claim 1 to the Defrost method of 3 each described air-conditionings, it is characterized in that, in manual defrosting mode, indoor set sends by remote control mode and forces the defrosting signal.
8. according to claim 1 to the Defrost method of 3 each described air-conditionings, it is characterized in that, in manual defrosting mode, indoor set sends by the line traffic control mode and forces the defrosting signal.
9. air conditioner defrosting system, it comprises:
Temperature detecting unit comprises the outdoor ring temperature sensor that detects ambient temperature, and detects the temperature sensor of off-premises station heat exchanger frosting situation;
Time calculating unit calculates the time and the running cumulative time that heat the compressor continuous operation, and detected value is placed in the memory;
Main control unit, the data that the data that temperature detecting unit is detected and time calculating unit detect are resolved, and analysis result is sent to the defrosting mode selected cell with the form of signal;
The defrosting mode selected cell carries out the selection of defrosting mode according to the analysis result of main control unit and the pressure defrosting signal of the indoor set transmission that receives.
10. air conditioner defrosting system according to claim 9 is characterized in that: the temperature sensor that detects off-premises station heat exchanger frosting situation is divided into condensation temperature sensor Tc and defrosting temperature sensor Te.
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