CN101256045A - Intelligent defrosting method for air onditioner - Google Patents

Abstract

The invention relates to an intelligent defrosting method of an air conditioner. The air conditioner judges whether one of the seven conditions is satisfied according to a series of integral elements such as indoor coil pipe temperature transducer variable quantity, environment temperature variable quantity, indoor wind velocity variable quantity, heat-production runtime accumulation quantity, and whether an outdoor fan and a compressor are overcurrent protected, to determine whether an outdoor set is defrosted or whether defrosting is needed or not, so that intelligent defrosting is performed without using an outdoor coil pipe temperature transducer. The outdoor coil pipe temperature transducer and related signal lines are saved on the base of traditional air conditioners. Intelligent defrosting can be performed without human interference and only operation according to a preset program is needed. Clean outdoor defrosting is provided, heat quantity is not affected, and international specified requirements are satisfied.

Description

A kind of intelligent defrosting method of air-conditioner

Technical field

The present invention relates to a kind of intelligent defrosting method of air-conditioner.

Background technology

The tradition air-conditioning all need judge whether frost and defrosted by outdoor temperature sensor, it as the patent No. Chinese patent " aircondition and Defrost operation release method thereof " of ZL03107294.1 etc., also there is the part air-conditioning not use outdoor temperature sensor but the built-in time defrosting of program, or " intelligent defrosting " judged according to the part changing factor, as the patent No. is the Chinese patent air conditioner outdoor machine defrosting operation controlling method of ZL200510014236.1, the patent No. is the Chinese patent air conditioner divisional defrosting control method of Z1200510035468.5, does not enter defrosting but all may exist, defrosting not to the utmost, frostless defrosting, defrosting does not meet the national standard requirement, influence common faults such as heating effect because of defrosting.

Summary of the invention

Technical problem to be solved by this invention is the intelligent defrosting method that a kind of air-conditioner is provided at above-mentioned prior art, it moves air-conditioner under special program, utilize the relative theory of air-conditioner, if off-premises station has been tied frost in the process of heating, coil temperature to indoor set, the indoor set wind speed, the ruuning situation of outdoor fan and compressor is all influential, the factor of comprehensive these variations, thereby judge whether frosting of off-premises station, whether whether frosting seriously and defrost, avoid causing that frostless defrosting of off-premises station or frosting are very serious does not also defrost, influence the heating capacity of air-conditioning, big and the heating effect of energy consumption damages disadvantages such as air-conditioning when bad even serious, this intelligent defrosting can save the temperature sensor and the coherent signal line of traditional air-conditioner outdoor unit, and defrosting effect and heating effect are all good than traditional air-conditioning.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of intelligent defrosting method of air-conditioner, it is characterized in that air-conditioner when satisfying one of following defrosting condition, and then begin the defrost defrosting,

One of defrosting condition is:

1.1) outer blower fan enters overload protection and outer blower fan is out of service;

And, 1.2) start once more after outer blower fan is out of service and the time of running continuously surpasses 10min;

And, 1.3) and compressor accumulated running time 〉=45min;

And, 1.4) and compressor continuous operating time 〉=20min;

And, 1.5) and TE≤48 ℃;

Two of defrosting condition is:

2.1) enter behind the heating mode 5min or after defrosting just finished 5min the maximum difference of catching TE and TA;

If 1. TE 〉=38 ℃ are when the difference of TE and TA has reduced more than 5 ℃ and duration 〉=3min;

Perhaps, if 2. TE＜38 ℃, when the difference of TE and TA has reduced more than 3 ℃ and duration 〉=3min;

And, 2.2) and compressor continuous operating time 〉=5min;

And, 2.3) and compressor Cumulative Elapsed Time 〉=45min;

And, 2.4) and TE≤48 ℃;

Three of defrosting condition is:

3.1) compressor accumulated running time 〉=3h;

And, 3.2) and compressor continuous operation time 〉=20min;

And, 3.3) and the difference of TE and TA is less than 16 ℃;

Four of defrosting condition is:

4.1) difference of TE and TA is less than 16 ℃ and continuously more than the 5min;

And, 4.2) and the compressor accumulated running time surpasses 45min;

And, 4.3) compressor continuously running surpass 20min;

Five of defrosting condition is:

Air-conditioning begins to clock after entering overtemperature protection, forces to enter once defrosting behind the 2h;

Six of defrosting condition is:

6.1) enter heating mode 5min first after, catch the TE maximum: if TE＜38 ℃

And, 6.2) and compressor continuous operating time 〉=5min;

And, 6.3) and compressor Cumulative Elapsed Time 〉=45min;

Seven of defrosting condition is:

7.1) behind heating mode, compressor accumulation operation 2h;

And, 7.2) and in this 2h, do not carry out defrosting;

And, 7.3) and compressor continuous operating time 〉=5min; Catch the TE maximum, if TE＜30 ℃ and duration 〉=3min;

Described TE represents the temperature of indoor coil, and TA represents indoor environment temperature.

As improvement, described defrosting condition two is considered the wind speed corrections, when the inner blower wind speed falls 1 grade, and temperature difference correction-1 ℃, when the inner blower wind speed rises 1 grade, temperature difference correction+1 ℃ makes this method consider the wind speed factor, and is practical more.

As improvement, described defrosting condition four enters defrosting for satisfying this condition, write down TE at that time earlier before defrosting beginning, defrosting finishes, and compressor is when moving 10min continuously, the TE and the preceding TE that defrosts are compared, if the latter is not more than the former 3 ℃, then no longer enter defrosting next time with this condition, enter up to pattern conversion, the start of shutdown back and heat or through after the defrosting once, make this method consider the temperature and the TA indoor environment temperature factor of TE indoor coil, practical more.

As improvement, after the described defrost exit criteria for satisfying one of following exit criteria,

One of exit criteria is: intelligent defrosting time 〉=9min;

Two of exit criteria is: after intelligent defrosting carries out 4min, if TE 〉=0 ℃, and TE has risen more than 2 ℃ in 10s;

Three of exit criteria is: after intelligent defrosting carries out 5min, if TE 〉=5 ℃.

At last, its action sequence of described defrosting is:

During the defrosting beginning, compressor, indoor fan, outdoor fan are closed, and cross valve is closed behind the 30s, and compressor is opened and entered the defrost operation behind 15s;

When defrosting finished to withdraw from, compressor cut out, outdoor fan is opened, and cross valve is opened behind the 55s, and compressor is opened behind 5s, and air-conditioning recovers normal heating operation, and indoor fan is by anti-cold wind operation.

Compared with prior art, the invention has the advantages that: 1, can accomplish the frost defrosting, the off-premises station defrosting is clean, and each defrosting finishes the back remaining frosting area of back off-premises station and is no more than 5% of condenser front face area; 2, do not influence heating effect, heating capacity is not less than 95% of nameplate regulation heating capacity; 3, defrost function meets concerned countries standard code requirement; Whole process is more reasonable, comprehensive a plurality of factors, better effects if.

The specific embodiment

Below in conjunction with embodiment the present invention is described in further detail.

The air-conditioner of this patent has overcome traditional shortcoming; air-conditioner according to variable quantity, the amount of involving of heating operation time and the outdoor fan of the variable quantity of the variable quantity of indoor coil pipe sensor (thermistor), environment temperature, indoor air velocity and compressor whether a series of composite factor such as overload protection judge whether frosting and whether defrosting of off-premises station, this intelligent defrosting is according to following some operation:

A) under the situation of intelligent defrosting mode operation, satisfy one of following seven big conditions (, then must satisfy simultaneously just and calculate effectively) beginning defrost, sleep lamp flicker during defrost for the little condition in each big condition:

Wherein: TE represents the temperature of indoor coil, and TA represents indoor environment temperature.

Defrosting condition one,

1) outer blower fan enters overload protection and outer blower fan is out of service;

2) outer blower fan starts after out of service and the time of running continuously surpasses 10min once more;

3) compressor accumulated running time 〉=45min;

4) compressor continuous operating time 〉=20min;

5)TE≤48℃。

Defrosting condition two,

1) enters behind the heating mode 5min or after defrosting just finished 5min the maximum difference of catching TE and TA;

If 1. TE 〉=38 ℃ are when the difference of TE and TA has reduced more than 5 ℃ and duration 〉=3min;

If 2. TE＜38 ℃ are when the difference of TE and TA has reduced more than 3 ℃ and duration 〉=3min;

2) compressor continuous operating time 〉=5min;

3) compressor Cumulative Elapsed Time 〉=45min;

4)TE≤48℃；

Wherein: when the wind speed correction is arranged, when the inner blower wind speed falls 1 grade, temperature difference correction-1 ℃, when the inner blower wind speed rises 1 grade, temperature difference correction+1 ℃.

Defrosting condition three,

1) compressor accumulated running time 〉=3h;

2) compressor continuous operation time 〉=20min;

3) difference of TE and TA is less than 16 ℃.

Defrosting condition four,

1) difference of TE and TA is less than 16 ℃ and continuous 5min or more than the 5min;

2) the compressor accumulated running time surpasses 45min;

3) compressor turns round continuously and surpasses 20min;

Satisfy this condition and enter defrosting, before the defrosting beginning, write down TE at that time earlier.Defrosting finishes, and compressor is when moving 10min continuously, and the TE before TE and the defrosting is compared, if the latter is not more than the former 3 ℃, then no longer enters defrosting with this condition next time, enters up to pattern conversion, the start of shutdown back to heat or through after the defrosting once;

Defrosting condition five,

Air-conditioning begins to clock after entering overtemperature protection, forces to enter once defrosting behind the 2h.

Defrosting condition six,

1) enter heating mode 5min first after, catch the TE maximum: if TE＜38 ℃

2) compressor continuous operating time 〉=5min;

3) compressor Cumulative Elapsed Time 〉=45min;

Defrosting condition seven,

1) behind heating mode, compressor accumulation operation 2h;

2) in this 2h, do not carry out defrosting.

3) compressor continuous operating time 〉=5min; Catch the TE maximum, if TE＜30 ℃ and duration 〉=3min;

B) the intelligent defrosting exit criteria is for satisfying one of following three big conditions:

One, intelligent defrosting time 〉=9min;

Two, after intelligent defrosting carries out 4min, if TE 〉=0 ℃, and TE has risen more than 2 ℃ in 10s;

Three, after intelligent defrosting carries out 5min, if TE 〉=5 ℃;

C) Chu Shuan action sequence is:

During the defrosting beginning, compressor, indoor fan, outdoor fan are closed, and cross valve is closed behind the 30s, and compressor is opened and entered the defrost operation behind 15s;

When defrosting finished to withdraw from, compressor cut out, outdoor fan is opened, and cross valve is opened behind the 55s, and compressor is opened behind 5s, and air-conditioning recovers normal heating operation, and indoor fan is by anti-cold wind operation;

Technique effect:

The air-conditioning of intelligent defrosting function is being arranged, can reach following effect:

1, can accomplish the frost defrosting, off-premises station defrosts clean, and each defrosting finishes the rear remaining frosting face of off-premises station Long-pending 5% of the condenser front face area that is no more than.

2, do not affect heating effect, heating capacity is not less than 95% of nameplate regulation heating capacity.

3, defrost function meets concerned countries standard code requirement.

Claims (5)

1. the intelligent defrosting method of an air-conditioner is characterized in that air-conditioner when satisfying one of following defrosting condition, then begins the defrost defrosting,

One of defrosting condition is:

1.1) outer blower fan enters overload protection and outer blower fan is out of service;

And, 1.2) start once more after outer blower fan is out of service and the time of running continuously surpasses 10min;

And, 1.3) and compressor accumulated running time 〉=45min;

And, 1.4) and compressor continuous operating time 〉=20min;

And, 1.5) and TE≤48 ℃;

Two of defrosting condition is:

2.1) enter behind the heating mode 5min or after defrosting just finished 5min the maximum difference of catching TE and TA;

If 1. TE 〉=38 ℃ are when the difference of TE and TA has reduced more than 5 ℃ and duration 〉=3min;

Perhaps, if 2. TE＜38 ℃, when the difference of TE and TA has reduced more than 3 ℃ and duration 〉=3min;

And, 2.2) and compressor continuous operating time 〉=5min;

And, 2.3) and compressor Cumulative Elapsed Time 〉=45min;

And, 2.4) and TE≤48 ℃;

Three of defrosting condition is:

3.1) compressor accumulated running time 〉=3h;

And, 3.2) and compressor continuous operation time 〉=20min;

And, 3.3) and the difference of TE and TA is less than 16 ℃;

Four of defrosting condition is:

4.1) difference of TE and TA is less than 16 ℃ and continuously more than the 5min;

And, 4.2) and the compressor accumulated running time surpasses 45min;

And, 4.3) compressor continuously running surpass 20min;

Five of defrosting condition is:

Air-conditioning begins to clock after entering overtemperature protection, forces to enter once defrosting behind the 2h;

Six of defrosting condition is:

6.1) enter heating mode 5min first after, catch the TE maximum: if TE＜38 ℃

And, 6.2) and compressor continuous operating time 〉=5min;

And, 6.3) and compressor Cumulative Elapsed Time 〉=45min;

Seven of defrosting condition is:

7.1) behind heating mode, compressor accumulation operation 2h;

And, 7.2) and in this 2h, do not carry out defrosting;

And, 7.3) and compressor continuous operating time 〉=5min; Catch the TE maximum, if TE＜30 ℃ and duration 〉=3min;

Described TE represents the temperature of indoor coil, and TA represents indoor environment temperature.

2. intelligent defrosting method according to claim 1 is characterized in that described defrosting condition two considers the wind speed corrections, when the inner blower wind speed falls 1 grade, and temperature difference correction-1 ℃, when the inner blower wind speed rises 1 grade, temperature difference correction+1 ℃.

3. intelligent defrosting method according to claim 1 and 2, it is characterized in that described defrosting condition four enters defrosting for satisfying this condition, before the defrosting beginning, write down TE at that time earlier, defrosting finishes, and when compressor moves 10min continuously, the TE and the preceding TE that defrosts are compared, if the latter is not more than the former 3 ℃, then no longer enter defrosting next time, enter up to pattern conversion, the start of shutdown back and heat or through after the defrosting once with this condition.

4. intelligent defrosting method according to claim 3 is characterized in that after the described defrost exit criteria for satisfying one of following exit criteria,

One of exit criteria is: intelligent defrosting time 〉=9min;

Two of exit criteria is: after intelligent defrosting carries out 4min, if TE 〉=0 ℃, and TE has risen more than 2 ℃ in 10s;

Three of exit criteria is: after intelligent defrosting carries out 5min, if TE 〉=5 ℃.

5. intelligent defrosting method according to claim 4 is characterized in that its action sequence of described defrosting is:

During the defrosting beginning, compressor, indoor fan, outdoor fan are closed, and cross valve is closed behind the 30s, and compressor is opened and entered the defrost operation behind 15s;

When defrosting finished to withdraw from, compressor cut out, outdoor fan is opened, and cross valve is opened behind the 55s, and compressor is opened behind 5s, and air-conditioning recovers normal heating operation, and indoor fan is by anti-cold wind operation.