CN111174369A - Control method of photovoltaic direct-drive variable frequency air conditioner, computer readable storage medium and air conditioner - Google Patents
Control method of photovoltaic direct-drive variable frequency air conditioner, computer readable storage medium and air conditioner Download PDFInfo
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- CN111174369A CN111174369A CN201911392092.1A CN201911392092A CN111174369A CN 111174369 A CN111174369 A CN 111174369A CN 201911392092 A CN201911392092 A CN 201911392092A CN 111174369 A CN111174369 A CN 111174369A
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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
- F24F11/32—Responding to malfunctions or emergencies
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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
- F24F11/62—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
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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
- F24F11/70—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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F11/70—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
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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
- F24F11/88—Electrical aspects, e.g. circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/12—Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier
Abstract
The invention provides a control method of a photovoltaic direct-drive variable frequency air conditioner, a computer readable storage medium and an air conditioner. The dynamic condition of the load of the air conditioner compressor and the photovoltaic power generation power matching condition are judged through detecting the power, the operation of the air conditioning unit and the cooling equipment is adaptively adjusted according to the conditions of photovoltaic large-load operation and photovoltaic small-load operation, the refrigerant circulation quantity is accurately controlled, supercooling and overheating adjustment are avoided, the safe and stable operation of the photovoltaic direct-drive frequency converter is guaranteed, and meanwhile the reliability of the cooling equipment is improved.
Description
Technical Field
The invention relates to the technical field of air conditioner control, in particular to a control method of a photovoltaic direct-drive variable frequency air conditioner, a computer readable storage medium and an air conditioner.
Background
In recent years, with the rapid development of economy in China and the improvement of energy conservation and emission reduction requirements, the photovoltaic direct-drive variable frequency air conditioning system has obvious advantages of environmental protection and energy conservation; the photovoltaic direct-drive variable frequency air conditioner achieves the effect of converting photovoltaic energy into direct drive by directly merging photovoltaic direct current into a direct current bus of a converter unit of a converter of a unit, and a converter module (comprising a rectifier module and an inverter module) can generate a large amount of heat in the conversion process; at present, the conventional cooling and heat dissipation mode of a photovoltaic frequency converter module is as follows: the photovoltaic cooling equipment is transmitted through the temperature of the detection module to control the refrigerant to flow in the copper pipe in the module so as to directly absorb the heat of the frequency converter for heat dissipation. The technology has the following defects that the quick change of photovoltaic voltage and the dynamic requirement of the air conditioner compressor load cannot be responded in real time, when a system switches a photovoltaic large load, the temperature of a cooling plate is increased sharply due to the fact that the switching frequency of a frequency converter is higher, and the amount of refrigerant is controlled through temperature detection; when the system switches photovoltaic small load operation, the temperature of the cooling plate is suddenly reduced, condensation and cooling equipment liquid return problems are easily caused by supercooling, and the condensed water can cause short circuit and burning of the frequency converter module; the supercooling adjustment causes the return liquid to affect the reliability of the cooling apparatus.
The reliability of the working of the frequency converter can be greatly influenced by the quality of a heat dissipation system of the frequency converter, namely the safety and stability of the frequency converter cannot be ensured in the process of working for a long time. The current loss of the current devices in the working process of the frequency converter causes the current devices to generate heat continuously, the current devices belong to temperature sensitive devices, the switching process of the current devices is easily influenced by temperature change, and the reliability of the frequency converter is greatly reduced.
The operating condition of the photovoltaic direct-drive frequency converter is more and more complicated, and the output power change of the frequency converter is influenced by the rapid change of the photovoltaic voltage; and the fluctuation of the junction temperature of the frequency converter module is changed along with the change of the output power of the frequency converter. Therefore, it is necessary to adjust the junction temperature of the module in real time according to the variation of the output power of the frequency converter.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a control method of a photovoltaic direct-drive variable frequency air conditioner, which is used for adjusting the junction temperature of a frequency converter module in real time according to the load dynamic of an air conditioner compressor and the photovoltaic power generation power matching condition.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method of a photovoltaic direct-drive variable frequency air conditioner is characterized in that after an air conditioning unit is powered on and started, photovoltaic power generation power and air conditioner power consumption power are detected in real time, the photovoltaic power generation power and the air conditioner power consumption power are calculated and analyzed, the condition that a frequency converter rectifying module generates heat is preliminarily judged, the temperature of the frequency converter rectifying module is further detected, and operating parameters of a frequency converter and cooling equipment of the air conditioning unit are adjusted according to the temperature of the frequency converter rectifying module. The dynamic condition of the load of the air conditioner compressor and the photovoltaic power generation power matching condition are judged through detecting the power, the operation of the air conditioning unit and the cooling equipment is adaptively adjusted according to the conditions of photovoltaic large-load operation and photovoltaic small-load operation, the refrigerant circulation quantity is accurately controlled, supercooling and overheating adjustment are avoided, the safe and stable operation of the photovoltaic direct-drive frequency converter is guaranteed, and meanwhile the reliability of the cooling equipment is improved.
Further, preliminarily judge that the frequency converter rectification module generates heat specifically as: and detecting the photovoltaic power generation power Pmf and the air conditioner power consumption power Pmp, and judging that the air conditioning unit generates a large amount of heat when the frequency converter rectification module is operated by the air conditioner unit when the Pmf is less than the Pmp and the Pmf is less than or equal to Y KW, wherein Y is a preset power value. The dynamic state of the air conditioner compressor load and the photovoltaic power generation power matching condition are judged through detecting the power, the output power of the frequency converter is restrained in advance, and the temperature of a plate block of the frequency converter is prevented from rising sharply.
Further, preliminarily judge that the frequency converter rectification module generates heat specifically as: and detecting the photovoltaic power generation power Pmf and the air conditioner power consumption power Pmp, and judging that the air conditioner unit generates extremely small heat for the frequency converter rectification module in the pure photovoltaic power generation working state when the Pmf is not less than Pmp, the Pmf is not more than Y-5 KW and the Pmp = 0. When the system is switched to photovoltaic low-load operation, the control of the exhaust superheat degree of a compressor of the cooling device is increased, the circulation quantity of a system refrigerant is properly adjusted, and the quantity of liquid refrigerant sucked by the compressor is reduced so as to control the liquid refrigerant of the exhaust pipe.
Further, the adjusting of the operation parameters of the frequency converter of the air conditioning unit according to the temperature of the frequency converter rectification module specifically comprises: and detecting the temperature T1 of the rectifier module of the frequency converter, and when the temperature T1 is more than or equal to TL, carrying out load limiting processing on the frequency converter of the air conditioning unit, limiting the frequency of the current frequency converter to rise, and maintaining the current frequency to run, wherein the TL is a preset frequency limiting temperature value. On the basis that the rectifying module of the frequency converter can generate a large amount of heat when the unit is started to operate, the temperature of the module is detected, and when the real-time temperature of the module is higher than the set frequency limiting temperature, the current rectifying module temperature is proved to be too high, only frequency limiting processing can be adopted, and the overhigh temperature of the rectifying module is avoided.
Further, the operation parameters of the frequency converter and the cooling device of the air conditioning unit adjusted according to the temperature of the frequency converter rectification module specifically include: detecting the temperature T1 of a rectifier module of the frequency converter, when T1 is not less than TL, performing frequency modulation frequency boosting processing on the compressor frequency of the cooling equipment according to a T2 target value, detecting the current temperature T1 of the rectifier module of the frequency converter in real time, if the current temperature T1 of the rectifier module of the frequency converter is not less than T2 +/-3 ℃ through continuous Y1s detection, increasing the frequency of the compressor of the cooling equipment by X Hz, detecting once again after C min, and if the TD is not less than T1 and less than TR, reducing the frequency N Hz again by the frequency converter of the air conditioning unit; and when the T1 is less than or equal to the TD, maintaining the current frequency for D min, operating the system again according to the frequency calculated by the load capacity of the air conditioner compressor, if the T1 is more than or equal to the TR, enabling the unit to enter a protection area, and stopping the unit according to a fault, wherein T2 is a preset temperature value, the TD is a preset frequency reduction temperature value, the TR is a preset protection temperature value, X and N are preset frequency values, and C and D are preset time values. After the air conditioning unit operates in a frequency-limited mode, the frequency of a compressor of the cooling equipment is increased simultaneously, the cooling efficiency of the cooling equipment is improved, the frequency of the compressor of the cooling equipment is continuously increased when the temperature of the rectification module is not reduced, and the frequency reduction processing needs to be performed on the air conditioning unit when the temperature of the rectification module is higher than the set frequency reduction temperature until the temperature of the rectification module is lower than the frequency reduction temperature; meanwhile, when the temperature of the rectifier module is higher than the set protection temperature, shutdown fault treatment is needed, and the rectifier module is prevented from being damaged.
Further, the operation parameters of the frequency converter and the cooling device of the air conditioning unit adjusted according to the temperature of the frequency converter rectification module specifically include: and detecting the temperature T1 of the rectifier module of the frequency converter, if the temperature T1 is not more than T2 +/-3 ℃, reducing the frequency of the compressor of the cooling equipment by F Hz, detecting once again after C min, and when the frequency of the compressor of the cooling equipment is reduced to the lowest frequency, maintaining the operation of the frequency, wherein F is a preset frequency value, and C is a preset time value. On the basis that the air conditioning unit generates extremely small heat for the rectifying module of the pure photovoltaic generator working state frequency converter, the temperature of the rectifying module is directly detected and judged, when the temperature of the rectifying module is smaller than a preset temperature value, the temperature of the rectifying module is not high, the frequency of a compressor of the cooling device is reduced, and the energy consumption is avoided being wasted.
Further, when the frequency of the compressor of the cooling device is reduced to the lowest frequency, the frequency is maintained to operate, meanwhile, the exhaust superheat degree Pt of the compressor of the cooling device is detected, when the Pt is less than or equal to Y1 ℃ and the T1 is less than or equal to T2 +/-3 ℃, the exhaust superheat degree control mode is entered, the opening degree of the electronic expansion valve EXV is controlled, and the circulation quantity of a system refrigerant is properly adjusted, wherein Y1 is a preset superheat degree value. When the system is switched to photovoltaic low-load operation, the control of the exhaust superheat degree of a compressor of the cooling device is increased, the opening degree of an electronic expansion valve is controlled, the circulation quantity of a system refrigerant is properly adjusted, the evaporation speed of the refrigerant is increased, the quantity of liquid refrigerants sucked by the compressor is reduced, and then the liquid refrigerants of an exhaust pipe are controlled.
Further, the exhaust superheat degree control mode specifically comprises the following steps: and when Pt is more than Y1 ℃, maintaining the opening degree of the current electronic expansion valve EXV.
A computer readable storage medium for storing a computer program which, when invoked by a processor, implements the control method of a photovoltaic direct-drive variable frequency air conditioner as set forth in any one of the above.
An air conditioner comprises a processor and a memory, wherein the memory is used for storing a computer program, and the computer program realizes the control method of the photovoltaic direct-drive variable frequency air conditioner when being called by the processor.
The control method of the photovoltaic direct-drive variable frequency air conditioner, the computer readable storage medium and the air conditioner provided by the invention have the beneficial effects that: 1) the dynamic condition of the load of the air conditioner compressor and the matching condition of the photovoltaic power generation power are judged by detecting the power, the output power of the frequency converter is inhibited in advance, and the temperature of a plate of the frequency converter is prevented from rising sharply; 2) the output power of the frequency converter is controlled to be synchronously combined with the frequency control of a compressor of the cooling equipment by detecting the fluctuation of the junction temperature of the frequency converter module, and the junction temperature of the frequency converter module is accurately adjusted; 3) when the system is switched to photovoltaic low-load operation, the control of the exhaust superheat degree of a compressor of the cooling device is increased, the circulation quantity of a system refrigerant is properly adjusted, and the quantity of liquid refrigerant sucked by the compressor is reduced so as to control the liquid refrigerant of the exhaust pipe.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of the present invention.
Example 1: a control method of a photovoltaic direct-drive variable frequency air conditioner.
As shown in fig. 1, a control method of a photovoltaic direct-drive variable frequency air conditioner specifically includes the following steps:
s1, after the air conditioning unit is powered on and started, the system enters an initialization detection state, detects the photovoltaic power generation power and the air conditioning power consumption power in real time, calculates and analyzes the photovoltaic power generation power and the air conditioning power consumption power, and preliminarily judges the condition that the frequency converter rectification module generates heat, specifically: detecting photovoltaic power generation power Pmf and air conditioner power consumption power Pmp, and judging that the air conditioning unit can generate a large amount of heat when the Pmf is less than Pmp and the Pmf is less than or equal to Y KW, wherein Y is a preset power value;
s2, detecting the temperature of the frequency converter rectification module, and adjusting the operating parameters of the frequency converter and the cooling equipment of the air conditioning unit according to the temperature of the frequency converter rectification module, wherein the method specifically comprises the following steps: detecting the temperature T1 of a frequency converter rectifying module, when T1 is larger than or equal to TL, carrying out load limiting treatment on a frequency converter of an air conditioning unit, limiting the frequency rise of the current frequency converter, maintaining the operation of the current frequency, simultaneously carrying out frequency modulation frequency rise treatment on the compressor frequency of cooling equipment according to a T2 target value, detecting the temperature T1 of the current frequency converter rectifying module in real time, if the temperature T1 of the current frequency converter rectifying module is continuously detected by Y1s to be larger than or equal to T2 +/-3 ℃, increasing the frequency of the compressor of the cooling equipment by 5 Hz, detecting the frequency again after 2 min, and if the TD is smaller than or equal to T1 and smaller than TR, reducing the frequency of the frequency; when the time T1 is less than or equal to the time TD, maintaining the current frequency for 3 min, operating the system again according to the frequency calculated by the load capacity of the air conditioner compressor, if the time T1 is more than or equal to the time TR, enabling the unit to enter a protection area, and stopping the unit according to a fault, wherein T2 is a preset temperature value, the time TD is a preset frequency reduction temperature value, the time TR is a preset protection temperature value, and the time TL is a preset frequency limit temperature value;
s3, when Pmf is larger than or equal to Pmp, Pmf is smaller than or equal to Y-5 KW, and Pmp =0, judging that the air conditioning unit generates extremely small heat for the frequency converter rectifying module in a pure photovoltaic power generation working state, and the temperature of the cooling plate of the frequency converter is suddenly reduced; if T1 is not less than T2 +/-3 ℃, reducing the frequency of the compressor of the cooling equipment by 3 Hz, detecting again after 2 min, if the temperature still meets the condition that T1 is not less than T2 +/-3 ℃, continuously reducing the frequency of the compressor by 3 Hz, and keeping the frequency to operate according to the rule until the frequency of the compressor is reduced to the lowest frequency; controlling the flow rate of a copper pipe in a module of a refrigeration medium, detecting the exhaust superheat Pt of a compressor of a cooling device, entering an exhaust superheat control mode when Pt is not more than Y1 ℃ and T1 is not more than T2 +/-3 ℃, controlling the opening of an electronic expansion valve EXV, properly adjusting the circulation quantity of a system refrigerant, preferentially entering the exhaust superheat control mode, controlling the opening of the electronic expansion valve EXV, properly adjusting the circulation quantity of the system refrigerant, and ensuring that the opening of the current electronic expansion valve EXV is maintained after the exhaust superheat Pt is more than Y1 ℃ to avoid the problems of over-cooling condensation and liquid return of the cooling device, wherein Y1 is a preset superheat value.
In the embodiment, the matching condition of the load of the air conditioner compressor and the photovoltaic power generation power is judged by detection, the output power of the frequency converter is inhibited in advance, the temperature of a plate of the frequency converter is controlled to rise sharply, then the fluctuation of junction temperature of a module of the frequency converter is further detected, the output power of the frequency converter is controlled to be synchronously controlled by combining the frequency of the compressor of the cooling device, the junction temperature of the module of the frequency converter is accurately regulated, when the system is switched to run under a photovoltaic small load, the exhaust superheat degree control of the compressor of the cooling device is increased, the opening degree of an electronic expansion valve is controlled, the circulation quantity of a system refrigerant is properly regulated, the evaporation speed of the refrigerant is accelerated, and the quantity of the liquid refrigerant.
Example 2: a computer readable storage medium.
A computer-readable storage medium for storing a computer program, which, when invoked by a processor, implements the control method of the photovoltaic direct-drive variable frequency air conditioner of embodiment 1.
Example 3: an air conditioner.
An air conditioner comprises a processor and a memory, wherein the memory is used for storing a computer program, and the control method of the photovoltaic direct-drive variable frequency air conditioner in embodiment 1 is realized when the computer program is called by the processor.
The above description is only for the preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, and therefore, all equivalent or modifications that do not depart from the spirit of the present invention are intended to fall within the scope of the present invention.
Claims (10)
1. A control method of a photovoltaic direct-drive variable frequency air conditioner is characterized in that after an air conditioning unit is powered on and started, photovoltaic power generation power and air conditioner power consumption power are detected in real time, the photovoltaic power generation power and the air conditioner power consumption power are calculated and analyzed, the condition that a frequency converter rectifying module generates heat is preliminarily judged, the temperature of the frequency converter rectifying module is further detected, and the operating parameters of a frequency converter and cooling equipment of the air conditioning unit are adjusted according to the temperature of the frequency converter rectifying module.
2. The control method of the photovoltaic direct-drive variable frequency air conditioner as claimed in claim 1, wherein the preliminary judgment of the heat generation condition of the inverter rectification module specifically comprises: and detecting the photovoltaic power generation power Pmf and the air conditioner power consumption power Pmp, and judging that the air conditioning unit generates a large amount of heat when the frequency converter rectification module is operated by the air conditioner unit when the Pmf is less than the Pmp and the Pmf is less than or equal to Y KW, wherein Y is a preset power value.
3. The control method of the photovoltaic direct-drive variable frequency air conditioner as claimed in claim 1, wherein the preliminary judgment of the heat generation condition of the inverter rectification module specifically comprises: and detecting the photovoltaic power generation power Pmf and the air conditioner power consumption power Pmp, and judging that the air conditioner unit generates extremely small heat for the frequency converter rectification module in the pure photovoltaic power generation working state when the Pmf is not less than Pmp, the Pmf is not more than Y-5 KW and the Pmp = 0.
4. The control method of the photovoltaic direct-drive variable frequency air conditioner as claimed in claim 2, wherein the adjusting of the operation parameters of the inverter of the air conditioning unit according to the temperature of the inverter rectification module specifically comprises: and detecting the temperature T1 of the rectifier module of the frequency converter, and when the temperature T1 is more than or equal to TL, carrying out load limiting processing on the frequency converter of the air conditioning unit, limiting the frequency of the current frequency converter to rise, and maintaining the current frequency to run, wherein the TL is a preset frequency limiting temperature value.
5. The control method of the photovoltaic direct-drive variable frequency air conditioner as claimed in claim 2, wherein the adjusting of the operating parameters of the frequency converter and the cooling device of the air conditioning unit according to the temperature of the frequency converter rectification module specifically comprises: detecting the temperature T1 of a rectifier module of the frequency converter, when T1 is not less than TL, performing frequency modulation frequency boosting processing on the compressor frequency of the cooling equipment according to a T2 target value, detecting the current temperature T1 of the rectifier module of the frequency converter in real time, if the current temperature T1 of the rectifier module of the frequency converter is not less than T2 +/-3 ℃ through continuous Y1s detection, increasing the frequency of the compressor of the cooling equipment by X Hz, detecting once again after C min, and if the TD is not less than T1 and less than TR, reducing the frequency N Hz again by the frequency converter of the air conditioning unit; and when the T1 is less than or equal to the TD, maintaining the current frequency for D min, operating the system again according to the frequency calculated by the load capacity of the air conditioner compressor, if the T1 is more than or equal to the TR, enabling the unit to enter a protection area, and stopping the unit according to a fault, wherein T2 is a preset temperature value, the TD is a preset frequency reduction temperature value, the TR is a preset protection temperature value, X and N are preset frequency values, and C and D are preset time values.
6. The control method of the photovoltaic direct-drive variable frequency air conditioner as claimed in claim 3, wherein the adjusting of the operating parameters of the frequency converter and the cooling device of the air conditioning unit according to the temperature of the frequency converter rectification module specifically comprises: and detecting the temperature T1 of the rectifier module of the frequency converter, if the temperature T1 is not more than T2 +/-3 ℃, reducing the frequency of the compressor of the cooling equipment by F Hz, detecting once again after C min, and when the frequency of the compressor of the cooling equipment is reduced to the lowest frequency, maintaining the operation of the frequency, wherein F is a preset frequency value, and C is a preset time value.
7. The control method of the photovoltaic direct-drive variable frequency air conditioner as claimed in claim 6, wherein when the frequency of the compressor of the cooling device is reduced to the lowest frequency, the frequency is maintained to operate, meanwhile, the exhaust superheat degree Pt of the compressor of the cooling device is detected, when the temperature Pt is not less than Y1 ℃ and the temperature T1 is not less than T2 +/-3 ℃, the control method enters an exhaust superheat degree control mode to control the opening degree of an electronic expansion valve EXV and properly adjust the circulation quantity of a system refrigerant, wherein Y1 is a preset superheat value.
8. The control method of the photovoltaic direct-drive variable frequency air conditioner as claimed in claim 7, wherein the exhaust superheat degree control mode is specifically as follows: and when Pt is more than Y1 ℃, maintaining the opening degree of the current electronic expansion valve EXV.
9. A computer-readable storage medium for storing a computer program, wherein the computer program, when being invoked by a processor, implements the control method of a photovoltaic direct-drive inverter air conditioner according to any one of claims 1 to 8.
10. An air conditioner, comprising a processor and a memory, wherein the memory is used for storing a computer program, and the computer program is invoked by the processor to realize the control method of the photovoltaic direct-drive variable frequency air conditioner as claimed in any one of claims 1 to 8.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251778A (en) * | 2021-12-13 | 2022-03-29 | 珠海格力电器股份有限公司 | Heat dissipation control method and device, storage medium and photovoltaic air conditioner |
| CN114413447A (en) * | 2022-01-24 | 2022-04-29 | 珠海格力电器股份有限公司 | Unit control method and device and photovoltaic multi-split air conditioning system |
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