CN105202689B - The method and system of compressor target frequency control accuracy after raising air-conditioner defrosting - Google Patents
The method and system of compressor target frequency control accuracy after raising air-conditioner defrosting Download PDFInfo
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- CN105202689B CN105202689B CN201410296667.0A CN201410296667A CN105202689B CN 105202689 B CN105202689 B CN 105202689B CN 201410296667 A CN201410296667 A CN 201410296667A CN 105202689 B CN105202689 B CN 105202689B
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Abstract
The present invention relates to a kind of method and system of compressor target frequency control accuracy after raising air-conditioner defrosting.Method is：Detect the outdoor environment temperature T0 before air-conditioner defrosting；The outdoor environment temperature T1 before heating operation is reentered after detection air-conditioner defrosting；Calculate outdoor environment temperature gap Δ T=T1 T0；By Δ T compared with preset value A, the target frequency of compressor is determined according to comparative result；If Δ T >=A, then the target frequency of compressor is the corresponding frequencies of T1；If Δ T ＜ A, the target frequency of compressor is the corresponding frequencies of TO.The present invention can effectively prevent the influence that outdoor heat exchanger heating produces outdoor environment temperature detection unit during defrosting, the target frequency of compressor is more accurate when the air-conditioning is reentered heating operation, can effectively lift temperature rise effect when heating operation is reentered after air-conditioner defrosting.
Description
Technical field
The invention belongs to air-conditioning art field, is to be related to a kind of compressor target frequency after improving air-conditioner defrosting specifically
The method and system of control accuracy.
Background technology
At present, the running frequency of frequency converting air-conditioner compressor is determined according to outdoor environment temperature, and outdoor environment temperature
It is to be detected by being fixed on the temperature sensor on outdoor heat exchanger fin top.
Air-conditioning can have outdoor heat exchanger frosting when low-temperature heating is run, in order to ensure heating effect, it is necessary to
Defrost to outdoor unit.Existing air-conditioned Defrost method is generally：Refrigerating operaton is switched to from heating operation, i.e., by four-way valve
Commutation, outdoor heat exchanger are changed into condenser from evaporator, and release heat melts frost layer.When the frost layer on outdoor heat exchanger top is melted
After change, heat exchanger may proceed to radiate temperature sensor, until defrosting terminates.Thus, after defrosting, reenter
Before heating operation, the temperature of temperature sensor detection can be higher than actual environment temperature.
During heating operation, the target frequency of compressor can be reduced with the rise of outdoor environment temperature, and the above situation can be led
Compressor is caused to reenter the subnormal target frequency of target frequency of heating operation so that the temperature rise effect after start becomes
Difference.And at this time, if the target frequency is in the frequency hopping band of compressor, the target frequency of compressor will be reduced to frequency hopping lower limit
Frequency so that the temperature rise effect after start is further deteriorated.And if air-conditioning causes with preventing outer shroud temperature to fluctuate after start
If the anti-frequency fluctuation guard time function of frequency fluctuation, this case will be more serious, and compressor reenters heating operation
Target frequency can be always below normal target frequency, be continued until that guard time terminates so that temperature rise after start effect
Fruit is worse.
The content of the invention
It is an object of the invention to provide a kind of method of compressor target frequency control accuracy after raising air-conditioner defrosting, solution
Determine before reentering heating operation after existing air conditioner defrosts, the temperature of temperature sensor detection can be higher than actual environment temperature
Degree, causes the target frequency that compressor reenters heating operation relatively low so that the technology that the temperature rise effect after start is deteriorated is asked
Topic.
In order to solve the above technical problems, the present invention is achieved by the following scheme：
The method of compressor target frequency control accuracy, includes the following steps after a kind of raising air-conditioner defrosting：
（1）Detect the outdoor environment temperature T0 before air-conditioner defrosting；
（2）The outdoor environment temperature T1 before heating operation is reentered after detection air-conditioner defrosting；
（3）Calculate outdoor environment temperature gap Δ T=T1-T0；
（4）By Δ T compared with preset value A, the target frequency of compressor is determined according to comparative result；
Wherein, when A carries out temperature rise test for air-conditioning heating, before the outdoor circumstance temperature T1 and defrosting after defrosting under various operating modes
The minimum value of outdoor circumstance temperature degree T0 differences.By the target frequency of Δ T definite compressors compared with preset value A, than direct
Outdoor environment temperature according to detecting determines the target frequency of compressor, can effectively prevent that outdoor heat exchanger heats during defrosting
The influence produced to outdoor environment temperature detection unit, the target frequency of compressor is more when the air-conditioning is reentered heating operation
Accurately, temperature rise effect is effectively lifted.
Preferably, in step（4）In, if Δ T >=A, the target frequency of compressor is the corresponding frequencies of T1；If Δ T ＜
A, then the target frequency of compressor is the corresponding frequencies of TO.
Further, A is the arbitrary value in 17 DEG C -22 DEG C.
This method is particularly suitable for the situation of air conditioner low temperature heating operation, step（1）Detect outdoor environment temperature first before
Whether degree is less than preset value B, if so, then entering step（1）.
Preferably, preset value B≤5 DEG C.
Based on the design of the method for compressor target frequency control accuracy after above-mentioned raising air-conditioner defrosting, the present invention also proposes
A kind of system, including：
Temperature detecting unit, for reentering system after detecting the outdoor environment temperature T0 before air-conditioner defrosting, air-conditioner defrosting
Outdoor environment temperature T1 before heat operation, and the temperature signal of detection is transmitted to main control unit；
Main control unit, for calculating outdoor environment temperature gap Δ T=T1-T0, and by Δ T compared with preset value A,
The target frequency of compressor is determined according to comparative result；
Wherein, when A carries out temperature rise test for air-conditioning heating, before the outdoor circumstance temperature T1 and defrosting after defrosting under various operating modes
The minimum value of outdoor circumstance temperature degree T0 differences.By the target frequency of Δ T definite compressors compared with preset value A, than direct
Outdoor environment temperature according to detecting determines the target frequency of compressor, can effectively prevent that outdoor heat exchanger heats during defrosting
The influence produced to outdoor environment temperature detection unit, the target frequency of compressor is more when the air-conditioning is reentered heating operation
Accurately, temperature rise effect is effectively lifted.
Preferably, the main control unit is used for by Δ T compared with preset value A, if Δ T >=A, the target of compressor
Frequency is the corresponding frequencies of T1；If Δ T ＜ A, the target frequency of compressor is the corresponding frequencies of TO.
Further, A is the arbitrary value in 17 DEG C -22 DEG C.
The system is particularly suitable for the situation of air conditioner low temperature heating operation, and main control unit is for detecting outdoor environment temperature
It is no to be less than preset value B, when whether outdoor environment temperature is less than preset value B, start the system.
Preferably, preset value B≤5 DEG C.
Compared with prior art, the advantages and positive effects of the present invention are：The present invention after air-conditioner defrosting by reentering
The difference DELTA T and preset value A of the outdoor environment temperature T1 and outdoor environment temperature T0 before air-conditioner defrosting before heating operation is carried out
Compare the target frequency of definite compressor, if Δ T >=A, the target frequency of compressor is the corresponding frequencies of T1；If Δ T ＜ A,
Then the target frequency of compressor is the corresponding frequencies of TO, thus, the present invention can effectively prevent that outdoor heat exchanger heats during defrosting
The influence produced to outdoor environment temperature detection unit, the target frequency of compressor is more when the air-conditioning is reentered heating operation
Accurately, temperature rise effect when heating operation is reentered after air-conditioner defrosting can effectively be lifted.
After the detailed description of embodiment of the present invention is read in conjunction with the figure, the other features and advantages of the invention will become more
Add clear.
Brief description of the drawings
Fig. 1 is the flow chart of specific embodiment of the invention method.
Fig. 2 is the functional block diagram of the specific system of the present invention.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
The present embodiment proposes a kind of method of compressor target frequency control accuracy after raising air-conditioner defrosting, this method pair
When being reentered after air-conditioner defrosting before heating operation, the outdoor environment temperature for calculating compressor target frequency is limited
It is fixed, the outdoor environment temperature before heating operation and the outdoor environment temperature before defrosting are reentered after the air-conditioner defrosting of detection
When difference is more than or equal to setting value, compressor target frequency is calculated by the outdoor environment temperature before defrosting；Limited when difference is less than
During value, compressor target frequency is calculated by the outdoor environment temperature before heating operation is reentered after air-conditioner defrosting.Therefore, it is possible to
Effectively prevent the influence that outdoor heat exchanger heating produces outdoor environment temperature detection unit during defrosting, air-conditioning is reentered system
The target frequency of compressor is more accurate during heat operation, effectively lifts temperature rise effect.
Specifically, as shown in Figure 1, the present embodiment improves the method bag of compressor target frequency control accuracy after air-conditioner defrosting
Include following steps：
S1, air-conditioning are opened, into heating operation mode.
S2, detection outdoor environment temperature T, if outdoor environment temperature T≤5 DEG C, enter step S3.
S3, detection running state of air conditioner, environmental factor, and with air-conditioner defrosting conditions correlation, judge air-conditioning whether need into
Enter defrosting state, if meeting defrosting condition, enter step S4.
Outdoor environment temperature T0 before S4, detection air-conditioner defrosting.
S5, air-conditioning enter defrosting mode, control reversal valve commutation, and outdoor heat exchanger of air conditioner is changed into condenser from evaporator,
Release heat melts frost layer, and judges whether to reach the condition for exiting defrosting, if reaching the condition for exiting defrosting, exits and removes
Frost.
The outdoor environment temperature T1 before heating operation is reentered after S6, detection air-conditioner defrosting.
S7, calculate outdoor environment temperature gap Δ T=T1-T0.
S8, by Δ T compared with preset value A, if Δ T >=A, enters step S9；Otherwise, S10 is entered step.
S9, the target frequency of compressor are the corresponding frequencies of T1.
S10, the target frequency of compressor are the corresponding frequencies of TO.
Wherein, when setting value A carries out temperature rise test for air-conditioning heating, the outdoor circumstance temperature T1 after defrosting under various operating modes is with removing
The minimum value of outdoor circumstance temperature degree T0 differences before frost.Preferably, A is the arbitrary value in 17 DEG C -22 DEG C.
Based on the design of the method for compressor target frequency control accuracy after above-mentioned raising air-conditioner defrosting, the present embodiment also carries
A kind of system for improving compressor target frequency control accuracy after air-conditioner defrosting, including temperature detecting unit and master control list are gone out
Member, temperature detecting unit are responsible for detecting outdoor environment temperature, and main control unit receives the outdoor environment temperature of temperature detecting unit detection
Degree, the difference entered before defrosting and exit the outdoor environment temperature after defrosting that main control unit is detected according to outdoor temperature detection unit
Value determines the target frequency of compressor, so as to fulfill the effect quickly heated.
Specifically, as shown in Fig. 2, the present embodiment improves the system bag of compressor target frequency control accuracy after air-conditioner defrosting
Include：
Temperature detecting unit 10, for being reentered after detecting the outdoor environment temperature T0 before air-conditioner defrosting, air-conditioner defrosting
Outdoor environment temperature T1 before heating operation, and the temperature signal of detection is transmitted to main control unit.Temperature detecting unit includes
The temperature sensor on outdoor heat exchanger fin top is fixed on, for detecting T0, T1, temperature sensor is obtained after temperature signal
Send to main control unit 20, so that main control unit 20 judges to calculate the target frequency of compressor.
Main control unit 20, for the outdoor environment temperature T0 before the air-conditioner defrosting that is detected according to temperature detecting unit 10, sky
Outdoor environment temperature T1 calculating outdoor environment temperature gap Δ T=T1-T0 before heating operation are reentered after adjusting defrosting, and will
Δ T determines the target frequency of compressor according to comparative result compared with preset value A；If the target of Δ T >=A, then compressor
Frequency is the corresponding frequencies of temperature T1；If Δ T ＜ A, the target frequency of compressor is the corresponding frequencies of temperature TO.
Main control unit 20 always according to outdoor environment temperature and other factors, such as outdoor heat exchanger temperature etc., according into
Enter, exit defrosting condition and judge whether air-conditioning needs to enter, exit defrosting mode, and control air-conditioning to enter when condition meets,
Exit defrosting mode.
In the present embodiment, when setting value A carries out temperature rise test for air-conditioning heating, the outdoor circumstance temperature after defrosting under various operating modes
T1 and the minimum value of the outdoor circumstance temperature degree T0 differences before defrosting.It is preferred that A is the arbitrary value in 17 DEG C -22 DEG C.
The present embodiment can be prevented effectively by the target frequency of temperature difference T definite compressors compared with preset value A
The influence that outdoor heat exchanger heating produces outdoor environment temperature detection unit during defrosting, when making the air-conditioning reenter heating operation
The target frequency of compressor is more accurate, effectively lifts heating effect.
After air-conditioning enters heating mode, if outdoor environment temperature is relatively low, for example, when outdoor environment temperature is less than 5 DEG C, master control
Unit 20 judges whether to meet to enter defrosting condition according to the running state of air conditioner and environmental factor that detect.Removed when meeting to enter
During ice-lolly part, temperature detecting unit 10 detects outdoor environment temperature T0 at this time, and exports to main control unit 20, main control unit 20
Control air-conditioning enters defrosting state.After defrosting starts, main control unit 20 according to the running state of air conditioner and environment detected because
Element judges whether that satisfaction exits defrosting condition, and when meeting defrosting exit criteria, main control unit 20 controls air-conditioning to exit defrosting shape
State.Temperature detecting unit 10 reenters the outdoor environment temperature T1 before heating operation after detecting air-conditioner defrosting, and exports to master
Control unit 20.Main control unit 20 calculates outdoor environment temperature gap Δ T=T1-T0, and by Δ T compared with preset value A, root
The target frequency of compressor is determined according to comparative result；If Δ T >=A, then the target frequency of compressor is the corresponding frequencies of T1；If Δ
T ＜ A, then the target frequency of compressor is the corresponding frequencies of TO.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
To modify to the technical solution described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical solution spirit and
Scope.
Claims (8)
1. a kind of method of compressor target frequency control accuracy after raising air-conditioner defrosting, it is characterised in that the described method includes
Following steps：
（1）Detect the outdoor environment temperature T0 before air-conditioner defrosting；
（2）The outdoor environment temperature T1 before heating operation is reentered after detection air-conditioner defrosting；
（3）Calculate outdoor environment temperature gap Δ T=T1-T0；
（4）By Δ T compared with preset value A, the target frequency of compressor is determined according to comparative result；
Wherein, when A carries out temperature rise test for air-conditioning heating, the outdoor circumstance temperature T1 after defrosting under various operating modes and the outdoor before defrosting
The minimum value of circumstance temperature degree T0 differences;
It is described（4）In, if Δ T >=A, the target frequency of compressor is the corresponding frequencies of T1；If Δ T ＜ A, the mesh of compressor
Mark frequency is the corresponding frequencies of T0.
2. the method for compressor target frequency control accuracy, its feature exist after raising air-conditioner defrosting according to claim 1
In the A is the arbitrary value in 17 DEG C -22 DEG C.
3. the method for compressor target frequency control accuracy, its feature exist after raising air-conditioner defrosting according to claim 1
In described（1）Whether detection outdoor environment temperature first is less than preset value B before, if so, then entering（1）.
4. the method for compressor target frequency control accuracy, its feature exist after raising air-conditioner defrosting according to claim 3
In preset value B≤5 DEG C.
A kind of 5. system of compressor target frequency control accuracy after raising air-conditioner defrosting, it is characterised in that the system comprises：
Temperature detecting unit, for reentering heating fortune after detecting the outdoor environment temperature T0 before air-conditioner defrosting, air-conditioner defrosting
Outdoor environment temperature T1 before row, and the temperature signal of detection is transmitted to main control unit；
Main control unit, for calculating outdoor environment temperature gap Δ T=T1-T0, and by Δ T compared with preset value A, if Δ T
>=A, then the target frequency of compressor is the corresponding frequencies of T1；If Δ T ＜ A, the target frequency of compressor is the corresponding frequencies of TO
Rate;
Wherein, when A carries out temperature rise test for air-conditioning heating, the outdoor circumstance temperature T1 after defrosting under various operating modes and the outdoor before defrosting
The minimum value of circumstance temperature degree T0 differences.
6. the system of compressor target frequency control accuracy, its feature exist after raising air-conditioner defrosting according to claim 5
In the A is the arbitrary value in 17 DEG C -22 DEG C.
7. the system of compressor target frequency control accuracy, its feature exist after raising air-conditioner defrosting according to claim 5
In the main control unit is used to detect whether outdoor environment temperature is less than preset value B, is preset whether outdoor environment temperature is less than
During value B, start the system.
8. the system of compressor target frequency control accuracy, its feature exist after raising air-conditioner defrosting according to claim 7
In preset value B≤5 DEG C.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108050652A (en) * | 2017-11-24 | 2018-05-18 | Tcl空调器(中山)有限公司 | Air conditioner defrosting control method, air conditioner and storage medium |
| CN109282436B (en) * | 2018-08-27 | 2020-02-07 | 珠海格力电器股份有限公司 | Air conditioning unit compressor control method and device, computer equipment and storage medium |
| CN109084434B (en) * | 2018-08-29 | 2019-10-18 | 珠海格力电器股份有限公司 | A kind of frequency conversion heat pump air conditioner and its defrosting control method |
| CN111023459B (en) * | 2019-12-30 | 2021-06-15 | 宁波奥克斯电气股份有限公司 | Air conditioner operation control method and device and air conditioner |
| CN111397166B (en) * | 2020-02-24 | 2021-02-02 | 珠海格力电器股份有限公司 | Temperature return control method and device, storage medium and air conditioner |
| CN112696792B (en) * | 2020-12-22 | 2022-07-05 | 格力电器（武汉）有限公司 | Defrosting control method and device for air conditioner, electronic equipment and storage medium |
| CN114811957B (en) * | 2021-01-29 | 2024-02-09 | 青岛海尔新能源电器有限公司 | Control method and control device of water heater |
| CN113251574B (en) * | 2021-06-09 | 2022-04-19 | 宁波奥克斯电气股份有限公司 | Compressor frequency control method and device, electronic equipment and storage medium |
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| CN1094149A (en) * | 1992-12-18 | 1994-10-26 | 富士通总株式会社 | The control method of air-conditioner |
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