CN113203185B - Defrosting control method and device, computer readable storage medium and air conditioner - Google Patents

Defrosting control method and device, computer readable storage medium and air conditioner Download PDF

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CN113203185B
CN113203185B CN202110608931.XA CN202110608931A CN113203185B CN 113203185 B CN113203185 B CN 113203185B CN 202110608931 A CN202110608931 A CN 202110608931A CN 113203185 B CN113203185 B CN 113203185B
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defrosting
time
heating
period
heating operation
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CN113203185A (en
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刘永超
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Ningbo Aux Electric Co Ltd
Ningbo Aux Intelligent Commercial Air Conditioning Manufacturing Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

Abstract

The invention provides a defrosting control method, a defrosting control device, a computer readable storage medium and an air conditioner, wherein the defrosting control method comprises the following steps: s1: the air conditioner enters a heating mode, and the compressor is started; s2: periodically detecting defrosting parameters during the operation of the air conditioner; s3: duration t of first heating operation period of detection system1Recording the defrosting parameter value Q of each detection period in the first heating periodn，n＝t1K is the duration of the detection period; s4: calculating the time length t of the second heating operation period2(ii) a S5: calculating the time length t of the r +1 th heating operation periods. The defrosting control method provided by the invention is used for equivalently simulating the defrosting operation condition of the system by combining defrosting parameters according to the defrosting entering condition of the air conditioner, ensuring that the system enters defrosting under the condition of higher capacity output, adjusting the defrosting entering time of the outdoor unit in real time, avoiding the influence on the heating capacity due to too thick defrosting layer and improving the air conditioning effect.

Description

Defrosting control method and device, computer readable storage medium and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting control method and device, a computer readable storage medium and an air conditioner.
Background
In the low-temperature heating process of the air conditioner in winter, the condenser of the outdoor unit often frosts. At present, the following conditions are generally adopted to judge whether defrosting is carried out: the cumulative operating time of the compressor heating, the condenser coil temperature, and the system low pressure (using either one or a combination of the above).
The conventional defrosting operation control conditions are as follows:
after the heating compressor is continuously operated for 5min and the operation is accumulated for 40min, Pdt is detected to be less than or equal to 19bar or the temperature Tdef of the condenser coil is detected to be less than or equal to A (A is preferably-8 ℃, A is preferably less than or equal to-15 ℃ and less than or equal to-5 ℃) for 5min continuously, and the whole machine enters defrosting operation.
Such a judgment condition is often insufficient in refinement, and the following occurs: the surface of the condenser is accumulated with a thick frost layer, the temperature of the coil pipe of the condenser does not reach the defrosting condition, the heat exchange of an external machine is seriously influenced, the heat-producing capacity is seriously attenuated at the moment, and the heat-producing effect is poor, as shown in figure 1.
However, such a determination condition is not accurate, and the outdoor unit forms a thick layer of frost when entering defrosting, so that the heating capacity of the air conditioner is greatly attenuated, and the user effect is affected.
Disclosure of Invention
In view of the above, the present invention is directed to a defrosting control method and apparatus, a computer-readable storage medium, and an air conditioner, which combine defrosting parameters to equivalently simulate a defrosting operation condition of a system, so as to ensure that the system enters defrosting under a higher capacity output condition, adjust the time for an outdoor unit to enter defrosting in real time, avoid the heating capacity from being affected by a thick frost layer, and improve the air conditioning effect.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a defrosting control method comprises the following steps:
s1: the air conditioner enters a heating mode, and the compressor is started;
s2: the air conditioner operation periodically detects defrosting parameters, wherein the defrosting parameters are parameters with the same variation trend as the variation trend of the heating capacity;
s3: duration t of first heating operation period of detection system1Recording the defrosting parameter value Q of each detection period in the first heating periodn，n＝t1K is the duration of the detection period;
s4: calculating the time length t of the second heating operation period2；
For different defrosting parameter values Q in the first heating operation periodnIntegral processing is carried out to obtain the optimal defrosting parameter value QiCorresponding optimum time tiRecorded as the duration t of the second heating operation phase2Wherein, tiThe time when the defrosting is started under the heating mode is the time when the performance of the whole system is optimal;
s5: calculating the time length t of the r +1 th heating operation periods；
Calculating the average time length t of the system heating operation in r periodss＝(t1+t2+…+tr) R is more than or equal to 2, t to be calculatedsAs the time of the r +1 th cycle heating operation.
Further, in step S4, an average value of the integrated value of the defrosting parameter in the first n detection cycles over n time periods is taken
Figure BDA0003094772100000025
Comparing the defrosting parameter value at each time with the integral average value
Figure BDA0003094772100000026
QiIs close to
Figure BDA0003094772100000027
Finding out the optimal defrosting parameter value QiAnd an optimum time ti。
Further, in step S4, the optimum time t is calculatediThe method comprises the following steps:
s41: calculating the integral sum of the defrosting parameters in n times to the time: qGeneral assembly＝∫Qn；
S42: calculating the defrosting parameter value in each time period in the heating period on average:
Figure BDA0003094772100000021
Figure BDA0003094772100000022
s43: when the defrosting parameter value is detected to be decreased in sequence for 2 times continuously and
Figure BDA0003094772100000023
defaulting the defrosting parameter value to the optimal defrosting parameter value Qi，
Figure BDA0003094772100000024
S44: optimized frost parameter value QiCorresponding time tiAnd recording the optimal time and participating in the calculation of the next heating operation period.
Further, in step S5, the defrosting parameter value Q at different times in the r-th operation cycle is detectedrCalculating the optimal defrosting parameter value of the heating operation period process
Figure BDA0003094772100000031
And its corresponding optimum time tr，tsThe average value of the optimal heating operation time length of the system in the first r heating operation periods is obtained.
Further, the defrosting parameter comprises at least one of a high pressure value Pd, a low pressure value Ps, an exhaust temperature Td, an air suction temperature Ts, a system current I, a defrosting temperature Tao and a compressor operating frequency f.
Further, the value range of k is any value between 10s and 30 s.
Further, in step S1, the air conditioner enters a heating mode, and the plurality of internal machines are turned on.
The invention also discloses a defrosting control device, which comprises:
the detection module periodically detects the defrosting parameters and feeds the acquired defrosting parameters back to the calculation module;
a calculation module for recording or calculating the heating operation time in the former r heating periods of the air conditioner and calculating ts＝(t1+t2+…+tr)/r；
ExecuteModule for calculating t calculated by the modulesAs the heating operation time length of the r +1 heating period, the system operates t within the r +1 periodsDefrosting is carried out after the time.
The present invention also discloses a computer-readable storage medium having stored thereon a computer program for implementing the defrosting control method as described above.
The invention also discloses an air conditioner, which comprises a processor, wherein the processor realizes the defrosting control method when executing the computer program; and/or, comprises a defrosting control device as described above; and/or include a computer-readable storage medium as described above.
Compared with the prior art, the defrosting control method, the defrosting control device, the computer readable storage medium and the air conditioner have the following advantages:
(1) according to the defrosting control method, the defrosting parameters with the same variation trend as the variation trend of the heating capacity are utilized, the defrosting operation condition of the system is equivalently simulated, the system is ensured to be defrosted under the condition of high capacity output, and the air conditioning effect is improved.
(2) The defrosting control method provided by the invention performs equivalent treatment on the heating capacity attenuation condition by using the defrosting parameters, can adjust the defrosting time of the outdoor unit in real time, and avoids the heating capacity from being influenced by too thick frost layer.
(3) The defrosting control method provided by the invention is characterized in that equivalent simulation is carried out on the defrosting process of the system by using defrosting parameters, and the average value of the integral value of the defrosting parameters in the first n detection periods in n time periods is taken
Figure BDA0003094772100000041
By comparing the defrosting parameter value at each time with the integral average value
Figure BDA0003094772100000042
Finding out optimal defrosting parameter value QiAnd an optimum time ti(ii) a Taking the average value t of the optimal time of the first r running periodssAs heating in the r +1 th operation cycleThe method has the advantages that the influence of data acquisition errors of individual periods is eliminated, the low-efficiency heating operation time is effectively shortened, the system enters a defrosting mode as soon as possible, and the overall heating efficiency of the system is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a graph illustrating a conventional low-temperature heating operation capability in the prior art;
fig. 2 is an operation schematic diagram of an optimal time ti corresponding to the optimal high pressure value Pd obtained in the embodiment of the present invention;
fig. 3 is a graph of low temperature heating operation capability according to an embodiment of the present invention.
Detailed Description
In order to make the technical means, objectives and functions of the present invention easy to understand, embodiments of the present invention will be described in detail with reference to the specific drawings.
Example 1
The invention discloses a defrosting control method, which comprises the following steps:
s1: the air conditioner enters a heating mode, and the compressor is started.
S2: the air conditioner periodically detects defrosting parameters, wherein the defrosting parameters are parameters with the same variation trend as the variation trend of the heating capacity.
S3: duration t of first heating operation period of detection system1I.e. the time from the start of the compressor to the first entering defrost mode is t1Recording the defrosting parameter value Q at every moment in the first heating periodn，n＝t1K is the duration of the detection period.
S4: calculating the time length t of the second heating operation period2；
For different defrosting parameter values Q in the first heating operation periodnIntegral processing is carried out to obtain the optimal defrosting parameter value QiCorresponding optimum time tiAfter recording, as a second heating operationDuration t of a phase2Wherein the integral value of the defrosting parameter in the first n detection periods is taken as the average value in n time periods
Figure BDA0003094772100000053
By comparing the defrosting parameter value at each time with the integral average value
Figure BDA0003094772100000054
QiIs close to
Figure BDA0003094772100000055
Finding out the optimal defrosting parameter value QiAnd an optimum time ti。
S5: calculating the time length ts of the r +1 th heating operation period:
recording the time length of system heating operation in the former r periods as t1、t2、t3。。。trCalculating the average time length t of the system heating operation in r periodss＝(t1+t2+…+tr) R is more than or equal to 2, t to be calculatedsAs the time of the r +1 th cycle heating operation.
Namely, the defrosting parameter values Q at different moments in the r heating operation period are detectedrCalculating the optimal defrosting parameter value of the heating operation period process
Figure BDA0003094772100000056
And its corresponding optimum time trCalculating the average time length t of the system heating operation in r periodss＝(t1+t2+…+tr) R is more than or equal to 2, the time of the r +1 heating operation period is taken as the time of the system in the r +1 period, and the system operates tsDefrosting is carried out after the time.
The invention discloses a defrosting control method by using equivalent simulation of defrosting parameters to control defrosting time during heating, and the adopted defrosting parameters are at least one of a high-pressure value Pd, an exhaust temperature Td, an air suction temperature Ts, a system current I and a defrosting temperature T, so that the variation trend of the defrosting parameters and the variation trend of the heating capacity tend to beThe defrosting parameters are used for carrying out equivalent treatment on the heating capacity attenuation condition, the time for the outdoor unit to enter defrosting can be adjusted in real time, the heating capacity is prevented from being influenced due to too thick frost layer, meanwhile, the defrosting process of the system is equivalently simulated by using the defrosting parameters, and the average value of the integral value of the defrosting parameters in the previous n detection periods in n time periods is taken
Figure BDA0003094772100000051
By comparing the defrosting parameter value at each time with the integral average value
Figure BDA0003094772100000052
Finding out optimal defrosting parameter value QiAnd an optimum time ti(ii) a Taking the average value t of the optimal time of the first r running periodssAs the heating time of the (r + 1) th operation period, the method eliminates the influence of data acquisition errors of individual periods, effectively shortens the low-efficiency heating operation time, enables the system to enter a defrosting mode as soon as possible, and improves the overall heating effect of the system.
Preferably, as a preferred example of the present invention, in the step of S4, the optimal time t is calculatediThe method comprises the following steps:
s41: calculating the integral sum of the defrosting parameters in n times to the time: qGeneral assembly＝∫Qn；
S42: calculating the defrosting parameter value in each time period k in the heating cycle on average:
Figure BDA0003094772100000061
Figure BDA0003094772100000062
s43: when the defrosting parameter value is detected to be decreased in sequence for 2 times continuously and
Figure BDA0003094772100000063
then default the defrosting parameter value to QiThat is to say that the first and second electrodes,
Figure BDA0003094772100000064
the defrosting parameter at the moment i is an optimal defrosting parameter value;
s44: optimized frost parameter value QiCorresponding time tiAnd recording the optimal time and participating in the calculation of the next heating operation period.
The defrosting control method using the equivalent simulation of the defrosting parameters, disclosed by the invention, finds out the optimal defrosting parameter value Q by using an enumeration methodiRelative to the parabola of the defrosting parameter value at the heating operation stage, the defrosting parameter value just begins to rise and then falls, and the defrosting parameter value is detected for 2 times continuously and sequentially falls
Figure BDA0003094772100000065
Obtaining the optimal defrosting parameter value QiIf the integral optimal value of the defrosting parameter in the heating operation period is calculated, the defrosting operation at the moment can be considered to be carried out, the performance of the whole system is optimal, and the operation time length (the time length is set as t)m) The operating duration of the next heating operating phase (second operating phase) is recorded, i.e. the second operating phase is operated at system operation tmAnd entering defrosting operation after time, and simultaneously recording defrosting parameter values Q at different moments in the period.
Preferably, as a preferred example of the present invention, the defrosting parameter includes at least one of a high pressure value Pd, a low pressure value Ps, an exhaust temperature Td, a suction temperature Ts, a system current I, a defrosting temperature Tao, and a compressor operating frequency f. The defrosting temperature Tao is detected by an external unit environment temperature sensing bulb, the exhaust temperature Td is detected by an exhaust temperature sensor, the air suction temperature Ts is detected by an air return temperature sensor, the high pressure value Pd is detected by a high pressure sensor, and the low pressure value Ps is detected by a low pressure sensor.
Preferably, as a preferred example of the present invention, k is 10. ltoreq. k.ltoreq.30, k being preferably 20. Generally, k seconds is set as the time length of periodically detecting defrosting parameters, any parameter between k and 30 is selected according to the value, if the setting time is too long, abnormal protection can be caused when the control reaction is not timely, if the setting time is too short, overshoot and poor stability can be caused when the control action is too frequent, and the accurate and reliable control of the defrosting control method by using the defrosting parameter equivalent simulation is ensured.
Example 2
As a preferred example of the present invention, the defrosting parameter is a high pressure value Pd detected by a high pressure sensor, and the high pressure value Pd is used as an equivalent simulation parameter for the following description:
setting:
the operation frequency f of the compressor, the detection temperature Tao of the outer machine environment temperature sensing bulb, the detection temperature of the exhaust temperature sensor is exhaust temperature Td, the detection temperature of the return air temperature sensor is suction temperature Ts, and the pressure of the high-pressure sensor Pd and the pressure of the low-pressure sensor Ps.
The air conditioner periodically detects the parameters, and sets k seconds as a period.
And in the heating mode, m internal machines are started, and the compressor is started.
The first step is as follows: detecting and recording the high pressure Pd and the running time t0
The duration t of the first heating running period (from the start of the compressor to the first entering of the defrosting mode) of the system is detected0(t0About 50 minutes, according to the actual conditions), a high pressure value Pd corresponding to each moment (detection period k)n，n＝t0/k，
Since the variation trend of the high-pressure Pd is the same as that of the heating capacity, the capacity attenuation condition is equivalently treated by adopting Pd.
The second step is that: calculating the time length t of the second heating operation periodm。
Integrating different high-pressure values Pdn in the first heating operation period to obtain an optimal high-pressure value PdiCorresponding optimum time ti，
Wherein an optimal time t is calculatediThe method of (1):
calculating the integral sum of pressure in n times to the time: pdGeneral assembly＝∫Pdn
Secondly, calculating the pressure value in each time period k in the heating period on average:
Figure BDA0003094772100000071
finding out optimal pressure value Pd by means of enumeration methodiThe parabolic variation trend of the high-pressure value, the high-pressure value just begins to rise and then falls, and when the pressure values are detected for 2 times continuously, the pressure values fall in sequence and
Figure BDA0003094772100000072
then default to Pd for this pressure valueiTo an optimum pressure value, i.e.
Figure BDA0003094772100000073
Time, i time pressure value PdiIs the optimal pressure value.
Fourthly, the optimal time ti: optimum pressure value PdiCorresponding time tiAnd recording the optimal time and participating in the calculation of the next heating operation period.
According to the method, the integral optimal value of Pd in the heating operation period is calculated, namely the defrosting is considered to be carried out at the moment of the integral optimal value, the performance of the whole system is optimal, and the operation time length is set as the operation time length tmAnd recorded as the operating duration of the next heating operating phase (i.e., the second operating phase).
I.e. the second operating phase is in system operation tmAnd entering defrosting operation after time, and simultaneously recording pressure values Pd at different moments in the period.
The third step: calculating the time length t of the r +1 th heating operation periods，r≥2。
Detecting pressure values Pd at different moments in the r-th periodrCalculating the optimal high-pressure value of the periodic heating operation process
Figure BDA0003094772100000081
And its corresponding optimum time tr，
Calculating the average time length t of the system heating operation in r periodss＝(t1+t2+…+tr)/r。
This is the r +1 thThe system runs t in the (r + 1) th period during the period of heating operationsDefrosting is carried out after the time.
By taking the average heating operation time of r heating operation periods as the heating operation time of the (r + 1) th heating operation period, the influence of data acquisition errors of individual periods can be eliminated, and compared with the graph shown in fig. 1 and fig. 3, the defrosting operation of the system is obviously carried out in advance, so that the overall heating capacity is improved.
The invention discloses a defrosting control method by utilizing defrosting parameter equivalent simulation, which performs equivalent simulation on a system defrosting process through periodically detected defrosting parameters, such as high-pressure values, and takes the average value of the integral value of the high-pressure in n time periods in the first n detection running periods
Figure BDA0003094772100000082
By comparing the high-pressure value at each moment with the integral average value
Figure BDA0003094772100000083
Finding out optimal defrosting parameter value PdiAnd with PdiCorresponding optimum time tiThe average value t of the optimal time of the first r running periods is taken as the optimal heating time of the heating period of the air conditioner entering the defrosting mode in the heating processsAs the heating time of the (r + 1) th operation period, the low-efficiency heating operation time is effectively shortened, the system enters a defrosting mode as soon as possible, and the overall heating effect of the system is improved.
The invention also discloses a defrosting control device by using the equivalent simulation of defrosting parameters, which comprises the following components:
the detection module periodically detects the defrosting parameters and feeds the acquired defrosting parameters back to the calculation module;
a calculation module for recording or calculating the heating operation time in the former r heating periods of the air conditioner and calculating ts＝(t1+t2+…+tr)/r；
An execution module for calculating t calculated by the modulesAs the heating running time of the r +1 heating period, the system is in the r +1 periodIn, run tsDefrosting is carried out after the time.
The present invention also discloses a computer-readable storage medium having stored thereon a computer program for implementing the defrosting control method using the defrosting parameter equivalent simulation as described in the above embodiments.
The invention also discloses an air conditioner, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the computer program to realize the steps defined by the defrosting control method which utilizes the defrosting parameter equivalent simulation in the embodiment; and/or comprises a defrosting control device using an equivalent simulation of defrosting parameters as described in the above embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A defrosting control method is characterized by comprising the following steps:
s1: the air conditioner enters a heating mode, and the compressor is started;
s2: the air conditioner operation periodically detects defrosting parameters, wherein the defrosting parameters are parameters with the same variation trend as the variation trend of the heating capacity;
s3: duration t of first heating operation period of detection system1Recording the defrosting parameter value Q of each detection period in the first heating periodn，n＝t1K is the duration of the detection period;
s4: calculating the time length t of the second heating operation period2；
For different defrosting parameter values Q in the first heating operation periodnIntegral processing is carried out to obtain the optimal defrosting parameter value QiCorresponding optimum time tiRecorded as the duration t of the second heating operation phase2Wherein, tiFor the whole defrosting under the heating operation periodThe moment when the system performance is optimal;
s5: calculating the time length t of the r +1 th heating operation periods；
Calculating the average time length t of the system heating operation in the former r periodss＝(t1+t2+…+tr) R is more than or equal to 2, t to be calculatedsAs the time of the r +1 th cycle heating operation.
2. The defrosting control method according to claim 1, wherein in step S4, an average value of the integrated value of the defrosting parameter in the first n detection periods over n time periods is taken
Figure FDA0003515763570000011
Comparing the defrosting parameter value at each time with the integral average value
Figure FDA0003515763570000012
QiIs close to
Figure FDA0003515763570000013
Finding out the optimal defrosting parameter value QiAnd an optimum time ti。
3. The defrosting control method according to claim 1 or 2, wherein in the step of S4, the optimal time t is calculatediThe method comprises the following steps:
s41: calculating the integral sum of the defrosting parameters in n times to the time: qGeneral assembly＝∫Qn；
S42: calculating the defrosting parameter value in each time period in the heating period on average:
Figure FDA0003515763570000014
s43: when the defrosting parameter value is detected to be decreased in sequence for 2 times continuously and
Figure FDA0003515763570000015
defaulting the defrosting parameter value to the optimal defrosting parameter value Qi，
Figure FDA0003515763570000021
S44: optimized frost parameter value QiCorresponding time tiAnd recording the optimal time and participating in the calculation of the next heating operation period.
4. The defrosting control method of claim 3, wherein in step S5, the defrosting parameter value Q is detected at different times in the r-th operation cyclerCalculating the optimal defrosting parameter value of the heating operation period process
Figure FDA0003515763570000022
And its corresponding optimum time tr，tsThe average value of the optimal heating operation time length of the system in the first r heating operation periods is obtained.
5. The defrosting control method according to claim 1, wherein the defrosting parameter includes at least one of a high pressure value Pd, a low pressure value Ps, an exhaust temperature Td, an intake temperature Ts, a system current I, a defrosting temperature Tao, and a compressor operating frequency f.
6. The defrosting control method according to claim 1, wherein k has a value ranging from 10s to 30 s.
7. The defrosting control method according to claim 1, wherein in step S1, the air conditioner enters a heating mode and a plurality of internal machines are turned on.
8. A defrosting control apparatus characterized by comprising:
the detection module periodically detects the defrosting parameters and feeds the acquired defrosting parameters back to the calculation module;
a calculation module for recording or calculating the heating operation time in the former r heating periods of the air conditioner and calculating ts＝(t1+t2+…+tr)/r；
An execution module for calculating t calculated by the modulesAs the heating operation time length of the r +1 heating period, the system operates t within the r +1 periodsDefrosting is carried out after the time.
9. A computer-readable storage medium, having stored thereon a computer program for implementing the defrosting control method according to any one of claims 1 to 7.
10. An air conditioner comprising a processor, wherein the processor implements the defrosting control method according to any one of claims 1 to 7 when executing the computer program; and/or, comprising a defrost control apparatus as claimed in claim 8; and/or comprising a computer readable storage medium as claimed in claim 9.
CN202110608931.XA 2021-06-01 2021-06-01 Defrosting control method and device, computer readable storage medium and air conditioner Active CN113203185B (en)

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