CN112283868B - Air conditioner expansion valve control method, air conditioner and storage medium - Google Patents

Air conditioner expansion valve control method, air conditioner and storage medium Download PDF

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Publication number
CN112283868B
CN112283868B CN202011171292.7A CN202011171292A CN112283868B CN 112283868 B CN112283868 B CN 112283868B CN 202011171292 A CN202011171292 A CN 202011171292A CN 112283868 B CN112283868 B CN 112283868B
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expansion valve
parameter
opening degree
adjustment amount
air conditioner
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CN112283868A (en
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颜华周
代文杰
宋培刚
孙常权
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Guangdong TCL Intelligent HVAC Equipment Co Ltd
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Guangdong TCL Intelligent HVAC Equipment 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
    • 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
    • F24F11/56—Remote control
    • 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
    • F24F11/70—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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses an air conditioner expansion valve control method, an air conditioner and a storage medium. The opening degree of the air-conditioning expansion valve is adjusted by combining the difference value between the suction superheat degree of the compressor and the target suction superheat degree and the system load factor, and the change value of the system load factor is the reason for the change of the rotating speed of the compressor.

Description

Air conditioner expansion valve control method, air conditioner and storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner expansion valve control method, an air conditioner and a storage medium.
Background
In the operation process of the multi-connected air conditioning system, when the indoor unit is shut down due to the fact that part of the indoor units or indoor rooms reach the set temperature manually, the rotating speed of an outdoor compressor needs to be adjusted rapidly to meet the corresponding load requirement, and meanwhile the opening degree of an expansion valve of the outdoor unit needs to be adjusted to match the change of the refrigerant flow caused by the change of the rotating speed of the compressor, so that the better suction superheat degree of the compressor is obtained.
In the prior art, the opening degree of the expansion valve is adjusted through feedback adjustment of the suction superheat degree, namely, the opening degree of the expansion valve is adjusted according to the difference between the suction superheat degree and a target value, however, the opening degree of the expansion valve is adjusted according to the difference after the suction superheat degree is different from the target value, and the adjustment method has hysteresis, so that the problem that the rotation speed of the compressor is not matched with the opening degree of the electronic expansion valve easily occurs.
Thus, there is a need for improvements and enhancements in the art.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an air conditioner expansion valve control method, an air conditioner and a storage medium are provided to solve the problem in the prior art that the rotation speed of a compressor is not matched with the opening degree of an electronic expansion valve due to the fact that the opening degree of an expansion valve is adjusted according to the difference between the suction superheat degree and a target value.
In a first aspect of the present invention, a method for controlling an expansion valve of an air conditioner is provided, including:
determining a first adjustment quantity of the opening degree of an expansion valve according to a first parameter, and determining a second adjustment quantity of the opening degree of the expansion valve according to a second parameter, wherein the first parameter is a difference value between the suction superheat degree of a compressor of the air conditioner and a target suction superheat degree, and the second parameter is a system load factor of the air conditioner;
determining a target regulating quantity of the opening degree of the expansion valve according to the first regulating quantity and the second regulating quantity;
and adjusting the opening degree of the expansion valve according to the target adjustment quantity.
The air conditioner expansion valve control method, wherein the determining a first adjustment amount of the expansion valve opening according to the first parameter includes:
the first parameter is obtained once every preset time length, and the first adjustment quantity is determined according to the change value of the first parameter and the first parameter obtained last time, wherein the change value of the first parameter is the difference value between the first parameter obtained last time and the first parameter obtained last time.
The air conditioner expansion valve control method, wherein the determining a second adjustment amount of the opening degree of the expansion valve according to the second parameter includes:
and acquiring the second parameter once every preset time length, and determining the second adjustment quantity according to the change value of the second parameter, wherein the change value of the first parameter is the difference value between the second parameter acquired last time and the second parameter acquired last time.
The air conditioning expansion valve control method, wherein the determining the first adjustment amount according to the variation value of the first parameter and the first parameter obtained last time includes:
obtaining the first regulating quantity through a first preset formula;
the first preset formula is as follows: Δ P ═ k Δ T + m Δ T'
Wherein Δ P is the first adjustment amount, Δ T is the first parameter obtained last time, Δ T' is a variation value of the first parameter, k and m are preset values, k >0, and m > 0.
The air conditioner expansion valve control method, wherein the obtaining of the second adjustment quantity of the expansion valve opening according to the system load factor change value includes:
if the second parameter variation value is smaller than a preset threshold value, determining that the second adjustment quantity is 0;
and if the variation value of the second parameter is larger than the preset threshold value, acquiring the second regulating quantity according to a second preset formula.
The air conditioner expansion valve control method is characterized in that the second preset formula is as follows: delta P2＝ΔQ*A*Pnow
Wherein, Δ P2For said second adjustment quantity, Δ Q is the variation of said second parameter, PnowIs the current opening degree of the expansion valve, A is a preset value, A>0。
The air conditioner expansion valve control method, wherein the obtaining of the target adjustment amount of the expansion valve opening degree according to the first adjustment amount and the second adjustment amount comprises:
acquiring the sum of the first adjustment amount and the second adjustment amount as the target adjustment amount.
The control method of the air conditioner expansion valve, wherein the adjusting the opening degree of the expansion valve according to the target adjustment amount comprises:
acquiring a target opening degree of the expansion valve according to the current opening degree of the expansion valve and the target adjustment quantity;
and adjusting the opening degree of the expansion valve to the target opening degree.
In a second aspect of the present invention, there is provided an air conditioner including: the control method comprises a processor and a storage medium which is in communication connection with the processor, wherein the storage medium is suitable for storing a plurality of instructions, and the processor is suitable for calling the instructions in the storage medium to execute the steps of realizing the control method of the air conditioner expansion valve.
In a third aspect of the present invention, a storage medium is provided, wherein the storage medium stores one or more programs, and the one or more programs are executable by one or more processors to implement the steps of the air conditioning expansion valve control method according to any one of the above.
Has the advantages that: compared with the prior art, the air conditioner expansion valve control method, the air conditioner and the storage medium provided by the invention have the advantages that the opening degree of the air conditioner expansion valve is adjusted together by combining the difference value between the suction superheat degree of the compressor and the target suction superheat degree and the system load rate, and the change value of the system load rate is the reason for the change of the rotating speed of the compressor.
Drawings
FIG. 1 is a flow chart of an embodiment of an air conditioner expansion valve control method according to the present invention;
fig. 2 is a flowchart illustrating sub-steps of step S100 in an embodiment of an air conditioning expansion valve control method according to the present invention;
fig. 3 is a schematic structural diagram of an embodiment of an air conditioner provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
As shown in fig. 1, the method for controlling an expansion valve of an air conditioner provided in this embodiment includes the steps of:
and S100, determining a first adjustment quantity of the opening degree of the expansion valve according to the first parameter, and determining a second adjustment quantity of the opening degree of the expansion valve according to the second parameter.
The method for controlling the expansion valve of the air conditioner provided by the embodiment can be executed by the air conditioner, and in the operation process, the air conditioner obtains the first parameter and the second parameter, wherein the first parameter is a difference value between a suction superheat degree of a compressor of the air conditioner and a target suction superheat degree, and the second parameter is a system load factor of the air conditioner. Specifically, the compressor suction superheat SH of the air conditioner is a difference between the compressor suction temperature TQ1 and a saturation temperature TLP corresponding to a low-pressure of the air conditioning system, that is, SH is TQ 1-TLP. The target air suction superheat degree is a preset value, and the target air suction superheat degree is a corresponding air suction superheat degree when the circulation volume of a refrigerant in the air conditioning system is normal. The system load rate Q is the ratio of the indoor unit capacity demand to the outdoor unit rated capacity, i.e., Q is the indoor unit capacity demand/outdoor unit rated capacity.
The expansion valve in this embodiment is an expansion valve set as an outdoor unit of an air conditioner, and the expansion valve is used to adjust the amount of refrigerant circulating in the air conditioning system, and the larger the opening degree of the expansion valve is, the more refrigerant participating in the cooling/heating cycle in the system is. In this embodiment, the opening of the expansion valve is periodically adjusted, that is, the opening of the expansion valve is adjusted once every preset time period, so that the opening of the expansion valve can be adjusted in real time according to the operation condition of the air conditioner, and the amount of refrigerant circulating in the air conditioning system is maintained at a good level. In each expansion valve opening degree adjusting period, the first parameter and the second parameter are firstly obtained, and the adjusting amount of the latest expansion valve opening degree is determined according to the first parameter and the second parameter.
Specifically, the determining of the first adjustment amount of the opening degree of the expansion valve according to the first parameter includes:
and acquiring the first parameter once every preset time, and determining the first adjustment quantity according to the change value of the first parameter and the first parameter acquired last time.
The preset time length is a cycle time length for adjusting the opening degree of the expansion valve, the variation value of the first parameter is a difference value between the first parameter obtained last time and the first parameter obtained last time, specifically, each time the first parameter is obtained, the time for obtaining the first parameter is recorded, the first parameter obtained last time is the latest one of the stored first parameters, and the first parameter obtained last time is the one of the stored first parameters which has the shortest interval with the first parameter obtained last time. The determining the first adjustment amount according to the variation value of the first parameter and the first parameter obtained last time comprises:
and obtaining the first regulating quantity through a first preset formula.
The first preset formula is as follows: delta P1＝kΔT+mΔT′
Wherein, Δ P1For the first adjustment quantity, Δ T is the first parameter obtained last time, Δ T' is a variation value of the first parameter, k and m are preset values respectively representing the first parameter and a correction value of the variation value of the first parameter, k is a correction value of the variation value of the first parameter, and>0, for example, may be 5, 8, etc., m>0, for example, 10, 12, etc. may be taken, and specifically, according to the air conditioning expansion valve control method provided in this embodiment, a plurality of different sets of k and m may be used to perform an air conditioning expansion valve control test, and values of k and m used in the test in which the air conditioning expansion valve is matched with the rotation speed of the compressor and the suction superheat degree of the compressor meets the requirement are selected as final values of k and m.
Although the change of the suction superheat degree is caused by the change of the refrigerant quantity circulating in the air conditioning system, so the suction superheat degree can reflect the quantity of the refrigerant quantity circulating in the air conditioning system, the change of the refrigerant quantity circulating in the system is caused by the change of the rotating speed of the compressor of the outdoor unit caused by the change of the system load, and a certain time is consumed in the process from the change of the system load to the change of the rotating speed of the compressor to the change of the refrigerant quantity circulating in the system, that is, when the suction superheat degree is changed, the load of the system may not be the load causing the change, but a new change is generated, at the moment, the refrigerant circulating quantity required by the new load cannot be met by adjusting the opening degree of the expansion valve according to the suction superheat degree, namely, hysteresis exists, the rotating speed of the compressor is not matched with the opening degree, so the expansion valve, in this embodiment, the adjustment amount of the expansion valve is also determined in conjunction with the current load rate of the system.
Specifically, the determining the second adjustment amount of the opening degree of the expansion valve according to the second parameter includes:
and acquiring the second parameter once every preset time length, and determining the second adjustment quantity according to the change value of the second parameter, wherein the change value of the first parameter is the difference value between the second parameter acquired last time and the second parameter acquired last time.
The preset time is a period time for adjusting the opening degree of the expansion valve, specifically, each time the second parameter is acquired, a time for acquiring the second parameter is recorded, the latest acquired second parameter is the latest acquired time in the stored second parameters, and the last acquired second parameter is the shortest interval between the latest acquired second parameter and the stored second parameter. In this embodiment, each time the opening degree of the expansion valve is adjusted, the current system load factor of the system is acquired, the current system load factor is compared with the system load factor acquired last time, and a second adjustment amount of the opening degree of the expansion valve is determined according to a difference between the current system load factor and the system load factor, as shown in fig. 2, the determining the second adjustment amount according to the change value of the second parameter specifically includes:
and S110, if the variation value of the second parameter is smaller than a preset threshold value, determining that the second regulating quantity is 0.
The preset threshold is a preset value, the preset threshold may be set to 30%, 20%, and the like, if the variation value of the second parameter is smaller than the preset threshold, it indicates that the load factor of the air conditioning system does not vary greatly, at this time, the opening degree of the expansion valve may be directly adjusted according to the first parameter, that is, the suction superheat degree of the compressor, and then it is determined that the second adjustment amount is 0.
And S120, if the variation value of the second parameter is greater than the preset threshold value, acquiring the second regulating quantity according to a second preset formula.
If the change value of the second parameter is greater than the preset threshold value, which indicates that the load factor of the air conditioning system has a large change, the opening degree of the expansion valve needs to be adjusted together with the first parameter and the second parameter.
Specifically, the second preset formula is as follows: delta P2＝ΔQ*A*Pnow
Wherein, Δ P2For said second adjustment quantity, Δ Q is the variation of said second parameter, PnowA is the current opening degree of the expansion valve, A is a preset value, A represents the corrected value of the change value of the second parameter, A>0, for example, 3, 5, etc. may be taken, specifically, according to the air conditioning expansion valve control method provided in this embodiment, a plurality of values of a are used to perform an air conditioning expansion valve control test, and a value of a used in a test in which the air conditioning expansion valve is matched with the rotation speed of the compressor and the suction superheat degree of the compressor meets the requirement is selected as a final value of a.
After the first adjustment amount and the second adjustment amount are obtained, the method for controlling an expansion valve of an air conditioner according to this embodiment further includes:
and S200, determining a target adjusting amount of the opening degree of the expansion valve according to the first adjusting amount and the second adjusting amount.
Specifically, the determining a target adjustment amount of the opening degree of the expansion valve according to the first adjustment amount and the second adjustment amount includes:
acquiring the sum of the first adjustment amount and the second adjustment amount as the target adjustment amount.
And S300, adjusting the opening of the expansion valve according to the target adjustment quantity.
Specifically, the step S300 includes:
s310, acquiring a target opening degree of the expansion valve according to the current opening degree of the expansion valve and the target adjustment quantity;
specifically, the target opening degree of the expansion valve may be represented by the formula: ps＝Pnow+ΔP1+ΔP2Obtaining wherein P issIs the target opening degree, PnowIs the current opening degree, Δ P, of the expansion valve1Is the first adjustment amount, Δ P2Is the second adjustment amount.
And S320, adjusting the opening degree of the expansion valve to the target opening degree.
And after the target opening degree is obtained, sending the target opening degree to an expansion valve opening degree adjusting device, so that the opening degree of the expansion valve is adjusted to the target opening degree.
In summary, the present embodiment provides a method for controlling an air conditioning expansion valve, in which a difference between a suction superheat degree of a compressor and a target suction superheat degree and a system load factor are combined to jointly adjust an opening degree of the air conditioning expansion valve, and since a variation value of the system load factor is a cause of a variation in a rotation speed of the compressor, the opening degree of the air conditioning expansion valve is jointly adjusted by increasing the system load factor, so that adjustment of the opening degree of the expansion valve can be performed in time, and a problem that the rotation speed of the compressor is not matched with the opening degree of the expansion valve is prevented.
It should be understood that, although the steps in the flowcharts shown in the figures of the present specification are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps of the present invention are not limited to being performed in the exact order disclosed, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps of the present invention may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, databases, or other media used in embodiments provided herein may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
Example two
Based on the above embodiments, the present invention further provides an air conditioner, and a schematic block diagram thereof may be as shown in fig. 3. The air conditioner comprises a memory 10 and a processor 20, wherein a computer program is stored in the memory 10, and the processor 10 can at least realize the following steps when executing the computer program:
determining a first adjustment quantity of the opening degree of an expansion valve according to a first parameter, and determining a second adjustment quantity of the opening degree of the expansion valve according to a second parameter, wherein the first parameter is a difference value between the suction superheat degree of a compressor of the air conditioner and a target suction superheat degree, and the second parameter is a system load factor of the air conditioner;
determining a target regulating quantity of the opening degree of the expansion valve according to the first regulating quantity and the second regulating quantity;
and adjusting the opening degree of the expansion valve according to the target adjustment quantity.
Wherein the determining a first adjustment amount of the opening of the expansion valve according to the first parameter includes:
the first parameter is obtained once every preset time length, and the first adjustment quantity is determined according to the change value of the first parameter and the first parameter obtained last time, wherein the change value of the first parameter is the difference value between the first parameter obtained last time and the first parameter obtained last time.
Wherein the determining a second adjustment amount of the opening degree of the expansion valve according to the second parameter includes:
and acquiring the second parameter once every preset time length, and determining the second adjustment quantity according to the change value of the second parameter, wherein the change value of the first parameter is the difference value between the second parameter acquired last time and the second parameter acquired last time.
Wherein the determining the first adjustment amount according to the variation value of the first parameter and the first parameter obtained last time comprises:
obtaining the first regulating quantity through a first preset formula;
the first preset formula is as follows: Δ P ═ k Δ T + m Δ T'
Wherein Δ P is the first adjustment amount, Δ T is the first parameter obtained last time, Δ T' is a variation value of the first parameter, k and m are preset values, k >0, and m > 0.
Wherein the obtaining of the second adjustment amount of the opening degree of the expansion valve according to the system load factor change value includes:
if the second parameter variation value is smaller than a preset threshold value, determining that the second adjustment quantity is 0;
and if the variation value of the second parameter is larger than the preset threshold value, acquiring the second regulating quantity according to a second preset formula.
Wherein the second preset formula is as follows: delta P2＝ΔQ*A*Pnow
Wherein, Δ P2For said second adjustment quantity, Δ Q is the variation of said second parameter, PnowIs the current opening degree of the expansion valve, A is a preset value, A>0。
Wherein the acquiring of the target adjustment amount of the opening degree of the expansion valve according to the first adjustment amount and the second adjustment amount includes:
acquiring the sum of the first adjustment amount and the second adjustment amount as the target adjustment amount.
Wherein the adjusting the opening degree of the expansion valve according to the target adjustment amount includes:
acquiring a target opening degree of the expansion valve according to the current opening degree of the expansion valve and the target adjustment quantity;
and adjusting the opening degree of the expansion valve to the target opening degree.
EXAMPLE III
The present invention also provides a storage medium storing one or more programs, which can be executed by one or more processors to implement the steps of the air conditioning expansion valve control method according to the above embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (8)

1. An air conditioner expansion valve control method is characterized by comprising the following steps:
determining a first adjustment quantity of the opening degree of an expansion valve according to a first parameter, and determining a second adjustment quantity of the opening degree of the expansion valve according to a second parameter, wherein the first parameter is a difference value between the suction superheat degree of a compressor of the air conditioner and a target suction superheat degree, and the second parameter is a system load factor of the air conditioner;
determining a target regulating quantity of the opening degree of the expansion valve according to the first regulating quantity and the second regulating quantity;
adjusting the opening degree of the expansion valve according to the target adjustment quantity;
the determining the second adjustment amount of the opening degree of the expansion valve according to the second parameter includes:
acquiring the second parameter once every preset time length, and determining the second adjustment quantity according to the change value of the second parameter, wherein the change value of the second parameter is the difference value between the second parameter acquired last time and the second parameter acquired last time;
the acquiring of the second adjustment amount of the opening degree of the expansion valve according to the system load factor change value includes:
if the variation value of the second parameter is larger than a preset threshold value, acquiring a second regulating quantity according to a second preset formula;
the second preset formula is as follows: delta P2＝ΔQ*A*Pnow；
Wherein, Δ P2For said second adjustment quantity, Δ Q is the variation of said second parameter, PnowIs the current opening degree of the expansion valve, A is a preset value, A>0；
The system load factor of the air conditioner is the ratio of the capacity requirement of the indoor unit to the rated capacity of the outdoor unit.
2. An air conditioning expansion valve control method according to claim 1, wherein said determining a first adjustment amount of an expansion valve opening degree according to the first parameter comprises:
the first parameter is obtained once every preset time length, and the first adjustment quantity is determined according to the change value of the first parameter and the first parameter obtained last time, wherein the change value of the first parameter is the difference value between the first parameter obtained last time and the first parameter obtained last time.
3. An air conditioning expansion valve control method according to claim 2, wherein the determining the first adjustment amount based on the variation value of the first parameter and the first parameter acquired last time comprises:
acquiring the first regulating quantity through a first preset formula;
the first preset formula is as follows: Δ P ═ k Δ T + m Δ T'
Wherein Δ P is the first adjustment amount, Δ T is the first parameter obtained last time, Δ T' is a variation value of the first parameter, k and m are preset values, k >0, and m > 0.
4. An air conditioning expansion valve control method according to claim 1, wherein the obtaining a second adjustment amount of the expansion valve opening degree according to the system load factor variation value comprises:
and if the second parameter variation value is smaller than a preset threshold value, determining that the second adjustment amount is 0.
5. An air conditioning expansion valve control method according to claim 1, wherein the obtaining a target adjustment amount of an expansion valve opening degree from the first adjustment amount and the second adjustment amount comprises:
acquiring the sum of the first adjustment amount and the second adjustment amount as the target adjustment amount.
6. An air conditioning expansion valve control method as claimed in claim 1, wherein said adjusting the opening degree of the expansion valve in accordance with the target adjustment amount comprises:
acquiring a target opening degree of the expansion valve according to the current opening degree of the expansion valve and the target adjustment quantity;
and adjusting the opening degree of the expansion valve to the target opening degree.
7. An air conditioner, characterized in that the air conditioner comprises: a processor, a storage medium communicatively coupled to the processor, the storage medium adapted to store a plurality of instructions, the processor adapted to invoke the instructions in the storage medium to perform the steps of implementing the air conditioning expansion valve control method of any of claims 1-6.
8. A storage medium storing one or more programs, the one or more programs being executable by one or more processors to perform the steps of the air conditioning expansion valve control method as claimed in any one of claims 1-6.
CN202011171292.7A 2020-10-28 2020-10-28 Air conditioner expansion valve control method, air conditioner and storage medium Active CN112283868B (en)

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CN112283868B true CN112283868B (en) 2022-07-08

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