CN114923297A - Electronic expansion valve opening degree control method, device, equipment, medium and product - Google Patents

Electronic expansion valve opening degree control method, device, equipment, medium and product Download PDF

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Publication number
CN114923297A
CN114923297A CN202210352047.9A CN202210352047A CN114923297A CN 114923297 A CN114923297 A CN 114923297A CN 202210352047 A CN202210352047 A CN 202210352047A CN 114923297 A CN114923297 A CN 114923297A
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CN
China
Prior art keywords
value
expansion valve
opening
determining
electronic expansion
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Pending
Application number
CN202210352047.9A
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Chinese (zh)
Inventor
王月亮
宋龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Application filed by Qingdao Haier Air Conditioner Gen Corp Ltd, Qingdao Haier Air Conditioning Electric Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Air Conditioner Gen Corp Ltd
Priority to CN202210352047.9A priority Critical patent/CN114923297A/en
Publication of CN114923297A publication Critical patent/CN114923297A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • 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
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/01—Timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
    • 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 provides a method, a device, equipment, a medium and a product for controlling the opening of an electronic expansion valve, which relate to the technical field of control of the electronic expansion valve of an air conditioner and comprise the following steps: operating for a first time period, and acquiring the outdoor environment temperature before and after the first time period, and the compressor operating frequency and the exhaust temperature after the first time period; determining a target discharge temperature according to the outdoor ambient temperature before and after the first time period and the compressor operation frequency; determining the difference value of the outdoor environment temperature after the first time period and before the first time period, and determining the opening degree adjustment value of the electronic expansion valve according to the target exhaust temperature and the difference value of the outdoor environment temperature; and controlling the electronic expansion valve to adjust the opening according to the opening adjustment value. According to the invention, the opening adjustment value of the electronic expansion valve is determined together according to the target exhaust temperature value and the outdoor environment temperature difference value, so that the adjustment range of the opening adjustment value of the expansion valve can be narrowed, the variation fluctuation of the electronic expansion valve caused by the variation hysteresis of the exhaust temperature value is eliminated, and the opening of the expansion valve is accelerated to tend to be stable.

Description

Electronic expansion valve opening degree control method, device, equipment, medium and product
Technical Field
The invention relates to the technical field of control of electronic expansion valves of air conditioners, in particular to a method, a device, equipment, a medium and a product for controlling the opening degree of an electronic expansion valve.
Background
At present, an electronic expansion valve is mostly used as a throttling device in an air conditioner outdoor unit, when the air conditioner runs, because the initial valve opening degree of the electronic expansion valve is different from the actual valve opening degree, the opening degree adjustment of the existing electronic expansion valve is adjusted only according to an exhaust temperature value, the adjustment range is large, the effect of the opening degree adjustment of the expansion valve is poor when the running frequency of a compressor is low, large-degree fluctuation is easy to occur in the valve adjusting process, and the quick stabilization is difficult.
Disclosure of Invention
The invention provides a method, a device, equipment, a medium and a product for controlling the opening of an electronic expansion valve, which are used for solving the defects that the opening adjustment of the electronic expansion valve in the prior art is only adjusted according to an exhaust temperature value, the adjustment range is large, the adjustment effect of the opening of the expansion valve is poor when the operation frequency of a compressor is low, large fluctuation is easy to occur in the valve adjusting process, and the rapid stabilization is difficult, and realize the method, the device, the equipment, the medium and the product for controlling the opening of the electronic expansion valve.
The invention provides an opening control method of an electronic expansion valve, which comprises the following steps:
operating for a first time period, and acquiring the outdoor environment temperature before and after the first time period, and the operating frequency and the exhaust temperature of the compressor after the first time period;
determining a target discharge temperature according to the outdoor environment temperature before and after the first time period and the compressor operation frequency;
determining the difference value of the outdoor environment temperature after the first time length and before the first time length, and determining the opening degree adjustment value of the electronic expansion valve according to the target exhaust temperature and the difference value of the outdoor environment temperature;
and controlling the electronic expansion valve to adjust the opening according to the opening adjustment value.
According to the method for controlling the opening degree of the electronic expansion valve provided by the invention, the step of determining the opening degree adjusting value of the electronic expansion valve according to the difference value between the target exhaust temperature and the outdoor environment temperature comprises the following steps:
and determining an exhaust temperature difference value between the exhaust temperature after the first time period and the target exhaust temperature, and determining an opening adjustment value of the electronic expansion valve according to the exhaust temperature difference value and the outdoor environment temperature difference value.
According to the method for controlling the opening degree of the electronic expansion valve provided by the invention, the calculation formula for determining the opening degree adjustment value of the electronic expansion valve according to the exhaust temperature difference value and the outdoor environment temperature difference value comprises the following steps:
ΔY＝a×ΔT p +b×ΔT h +c；
wherein Δ Y is an opening difference, and Δ T p Is said difference in exhaust gas temperature, said Δ T h Taking the outdoor environment temperature difference value, wherein a and b are coefficients, and c is a constant;
the opening degree adjustment value is the largest integer smaller than or equal to the opening degree difference value.
According to the method for controlling the opening degree of the electronic expansion valve provided by the invention, after the opening degree difference value is calculated, the following steps are further executed:
determining an absolute value of the exhaust temperature difference;
determining a first preset difference interval in which the absolute value of the exhaust temperature difference falls;
determining a preset opening degree interval corresponding to the first preset difference value interval;
determining that the calculated opening difference value does not fall into the preset opening interval;
determining an end value which is closest to the opening difference value in the two end values of the preset opening interval as a target difference value;
and controlling the numerical value of the opening difference value to be changed into the numerical value of the target difference value.
According to the method for controlling the opening degree of the electronic expansion valve provided by the invention, before the step of calculating the opening degree difference value, the step of determining the constant c is further executed, and the method comprises the following steps:
and determining the current outdoor environment temperature, and determining a preset constant value corresponding to a preset temperature interval as the constant c according to the preset temperature interval in which the outdoor environment temperature falls.
According to the method for controlling the opening degree of the electronic expansion valve provided by the invention, after the steps of determining the opening degree adjusting value of the electronic expansion valve and controlling the opening degree of the electronic expansion valve to adjust according to the opening degree adjusting value, the following steps are further executed:
determining an absolute value of the exhaust temperature difference;
determining a second preset difference interval in which the absolute value of the exhaust temperature difference falls;
determining a preset time length value corresponding to the second preset difference interval;
after the preset time length value is operated, the outdoor environment temperature before and after the preset time length, and the compressor operation frequency and the exhaust temperature after the preset time length are obtained again;
determining the difference value of the outdoor environment temperature after the preset time length and before the preset time length, and determining a target exhaust temperature according to the exhaust temperature after the preset time length and the running frequency of the compressor;
determining an opening adjustment value of the electronic expansion valve according to the difference value between the target exhaust temperature and the outdoor environment temperature;
and controlling the electronic expansion valve to adjust the opening according to the opening adjustment value.
The invention also provides an opening control device of the electronic expansion valve of the air conditioner, which comprises the following components:
the acquisition module is used for acquiring the outdoor environment temperature, the compressor operation frequency and the compressor exhaust temperature;
the processing module is used for recording the operation time length, determining the difference value of the outdoor environment temperature after the first time length is operated and before the first time length is operated, and determining the target exhaust temperature according to the exhaust temperature after the first time length and the operation frequency of the compressor; determining an opening adjustment value of the electronic expansion valve according to the difference value between the target exhaust temperature and the outdoor environment temperature;
and the control module is used for controlling the electronic expansion valve to adjust the opening degree according to the opening degree adjusting value.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the opening degree control method of the electronic expansion valve.
The present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of controlling the opening degree of an electronic expansion valve as described in any of the above.
The present invention also provides a computer program product comprising a computer program, which when executed by a processor, implements the method for controlling the opening degree of an electronic expansion valve as described in any one of the above.
Compared with the method, the device, the equipment, the medium and the product for controlling the opening degree of the electronic expansion valve, which are provided by the invention, by determining the target exhaust temperature value and jointly determining the opening degree adjusting value of the electronic expansion valve according to the target exhaust temperature value and the outdoor environment temperature difference value, the method can reduce the adjusting range of the opening degree adjusting value of the expansion valve, eliminate the variation fluctuation of the electronic expansion valve caused by the variation hysteresis of the exhaust temperature value and accelerate the opening degree of the expansion valve to tend to be stable.
Drawings
In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic flow chart of a method for controlling an opening of an electronic expansion valve according to an embodiment of the present invention;
FIG. 2 is a second flowchart of a method for controlling the opening of an electronic expansion valve according to an embodiment of the present invention;
FIG. 3 is a third schematic flow chart of a method for controlling the opening of an electronic expansion valve according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Reference numerals:
110: a processor; 120: a communication interface; 130: a memory; 140: a communication bus.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "first" and "second", etc. are numbers that are used for clearly illustrating the product parts and do not represent any substantial difference. "upper", "lower", "inner", and the like are used merely to indicate relative positional relationships, and when the absolute position of a described object is changed, the relative positional relationships may also be changed accordingly. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
It should be noted that the description "in the range of …" in the present invention includes both end values. Such as "in the range of 10 to 20," includes both ends of the range of 10 and 20.
It is to be understood that, unless otherwise expressly specified or limited, the term "coupled" is used broadly, and may, for example, refer to directly coupled devices or indirectly coupled devices through intervening media. Specific meanings of the above terms in the embodiments of the invention may be understood as specific cases by those of ordinary skill in the art.
The electronic expansion valve opening control methods, apparatus, devices, media and products of the present invention are described below in conjunction with fig. 1-4.
Specifically, the present embodiment provides an electronic expansion valve opening degree control method, including the following steps:
step S100, operating for a first time period, and acquiring the outdoor environment temperature before and after the first time period, and the compressor operating frequency and the exhaust temperature after the first time period;
specifically, when the air conditioner is started or at a certain time in the operation process of the air conditioner, the outdoor environment temperature value T is obtained h1 And after the first time length is operated, the outdoor environment temperature value T after the first time length is obtained h2 And a compressor operating frequency F after a first period of time 1 And exhaust temperature T p1 。
Step S200, determining a target exhaust temperature according to the outdoor environment temperature before and after the first time period and the compressor operation frequency;
and determining a target exhaust temperature according to the outdoor environment temperature after the first time length and the compressor running frequency.
The present embodiment provides a calculation formula of the target exhaust gas temperature.
Specifically, Y is mxf + n + p
Where Y is the target exhaust temperature, m is a positive coefficient, n is a positive integer, p is an integer, and m and n are fixed values, and p is a variable and varies depending on the outdoor ambient temperature.
Step S300, determining an outdoor environment temperature difference value after the first time period and before the first time period, and determining an opening degree adjusting value of the electronic expansion valve according to the target exhaust temperature and the outdoor environment temperature difference value;
in particular, the outdoor ambient temperatureDifference value delta T h Is the outdoor ambient temperature value T h2 And outdoor ambient temperature value T h1 The difference of (a).
And after the target exhaust temperature is determined, determining an expansion valve opening degree adjustment value according to the target exhaust temperature and the degree of change of the outdoor environment temperature in the first time period.
And when the exhaust temperature after the first period of operation is less than the target exhaust temperature, closing the valve, wherein the valve closing amplitude is confirmed by the exhaust temperature difference value and the ambient temperature change value.
When the difference between the outdoor environment temperature and the set temperature is large, especially the starting time of the air conditioner, the running frequency of the compressor is high, the environment temperature difference is large, and the exhaust temperature value of the compressor is large. Along with the approach of the outdoor environment temperature to the set temperature, in order to enable the outdoor environment temperature to reach the set temperature value when the air conditioner operates, the opening degree of the electronic expansion valve needs to be further controlled to adjust the exhaust temperature value of the compressor to reach a new target exhaust temperature value, so that the exhaust temperature value is stable, and the opening degree value of the electronic expansion valve tends to be stable. However, the change of the exhaust temperature value has hysteresis relative to the adjustment of the opening of the electronic expansion valve, which easily causes the adjustment of the exhaust temperature value not in place, so that the adjustment degree of the opening of the electronic expansion valve is too large, the exhaust temperature value is excessively adjusted, and further the electronic expansion valve is excessively adjusted, so that the opening value of the electronic expansion valve fluctuates. The outdoor environment temperature difference value can represent the operation capacity of the air conditioner in a certain time period process, the opening degree adjusting value of the expansion valve is determined through the difference value of the target exhaust temperature value and the outdoor environment temperature, compared with the method that the opening degree adjusting value of the expansion valve is determined only through the target exhaust temperature, the adjusting range of the opening degree adjusting value of the expansion valve can be narrowed, variation fluctuation of the electronic expansion valve caused by variation hysteresis of the exhaust temperature value is eliminated, and the opening degree of the expansion valve is accelerated to tend to be stable.
And step S400, controlling the electronic expansion valve to adjust the opening degree according to the opening degree adjusting value.
And after the opening degree adjustment value is determined, adjusting the opening degree value of the electronic expansion valve according to the opening degree adjustment value.
Compared with the method for determining the opening adjustment value of the expansion valve only through the target exhaust temperature, the method for determining the opening adjustment value of the expansion valve can narrow the adjustment range of the opening adjustment value of the expansion valve, eliminate the variation fluctuation of the electronic expansion valve caused by the variation hysteresis of the exhaust temperature value and accelerate the opening of the expansion valve to tend to be stable.
Further, in this embodiment, on the basis of the foregoing embodiment, a specific embodiment of determining an opening adjustment value of an electronic expansion valve according to a difference between the target exhaust temperature and the outdoor environment temperature is further provided, which includes the following steps:
and determining the exhaust temperature difference value between the exhaust temperature after the first time period and the target exhaust temperature, and determining the opening degree adjustment value of the electronic expansion valve according to the exhaust temperature difference value and the outdoor environment temperature difference value.
Specifically, the exhaust temperature difference is the difference between the exhaust temperature after the first period of time and the target exhaust temperature.
Specifically, the opening degree adjustment value of the electronic expansion valve is determined by the following formula, and the calculation formula comprises:
ΔY＝a×ΔT p +b×ΔT h +c；
wherein Δ Y is an opening degree difference, and Δ T p Is said difference in exhaust gas temperature, said Δ T h Taking the outdoor environment temperature difference value, wherein a and b are coefficients, and c is a constant; the constant c is different depending on the outdoor ambient temperature.
Specifically, the operation frequency of the press machine is different under different outdoor environment temperatures, the change of the exhaust temperature after the opening degree of the electronic expansion valve is switched on and off with the same amplitude is different, the constant c is set to solve the problem, the constant c is related to different temperatures influencing the change of the frequency of the compressor, and when the opening degree value of the electronic expansion valve is adjusted with the same amplitude, the larger the change of the exhaust temperature is, the larger the value of c is.
After the opening degree difference value delta Y is calculated, the opening degree adjustment value is determined to be the largest integer smaller than or equal to the opening degree difference value.
For example, when the opening degree difference Δ Y is calculated to be 2.98, the opening degree adjustment value is determined to be 2; when the opening difference value delta Y is calculated to be 3.03, the opening adjustment value is determined to be 3; when the opening difference value delta Y is calculated to be-1.05, the opening adjustment value is determined to be-2.
Further, in this embodiment, a specific implementation of limiting the opening degree adjustment value is further proposed on the basis of the above-mentioned implementation, and as shown in fig. 2, the step S300 includes the following steps:
step S310, calculating an opening difference value delta Y;
specifically, the opening degree difference Δ Y may be calculated according to the calculation formula described in the above embodiment, where the calculation formula is:
ΔY＝a×ΔT p +b×ΔT h +c；
wherein Δ Y is an opening degree difference, and Δ T p Is said difference in exhaust gas temperature, said Δ T h Taking the outdoor environment temperature difference value, wherein a and b are coefficients, and c is a constant; the constant c is different depending on the outdoor ambient temperature.
Step S320, determining an absolute value of the exhaust temperature difference;
the exhaust temperature difference is the difference between the exhaust temperature after the first duration and the target exhaust temperature, and may be a positive number or a negative number under different working conditions. The present embodiment determines the absolute value of the exhaust temperature difference after it is determined.
Step S330, determining a first preset difference interval in which the absolute value of the exhaust temperature difference falls;
the air conditioner storage module is pre-stored with a plurality of first preset difference intervals, for example, two first preset difference intervals are respectively [0,3) (including 0, not including 3) and [3,5) (including 3, not including 5).
When the absolute value of the exhaust temperature value is determined to be 2.3, it is determined to fall within the [0,3) interval.
Step S340, determining a preset opening degree interval corresponding to the first preset difference value interval;
specifically, different first preset difference intervals correspond to different preset opening intervals. For example, the first preset difference interval [0,3) corresponds to a preset opening interval [ -5,5] (including-5 and 5), and the first preset difference interval [3,5) corresponds to a preset opening interval [ -10,10] (including-10 and 10).
When it is determined that the absolute value of the exhaust temperature value is 2.3 and falls within the first preset difference interval [0,3 ], it is determined that the corresponding preset opening interval is [ -5,5 ].
Step S350, determining that the calculated opening difference value does not fall into the preset opening interval;
and judging whether the calculated opening difference value falls into a preset opening range [ -5,5], and entering the step S360 when the opening difference value does not fall into the preset opening range [ -5,5 ].
Preferably, when the calculated opening difference value falls within the preset opening interval [ -5,5], the opening difference value is determined to be unchanged, and an opening adjustment value is determined according to the opening difference value.
S360, determining an end value which is closest to the opening difference value in the two end values of the preset opening interval as a target difference value;
and when the opening difference value does not fall into a preset opening range [ -5,5], determining an end value, closest to the opening difference value, of two end values of the preset opening range as a target difference value.
For example, if the calculated opening difference is 6.4, the rear end value 5 and the opening difference 6.4 are closest to each other in the two end points-5 and 5 of the preset opening interval [ -5,5], and the end value 5 is determined as the target difference.
And step S370, controlling the value of the opening difference to be changed to the value of the target difference.
After the target difference is determined to be 5, the calculated opening difference 6.4 is changed to 5, and an opening adjustment value is again determined based on the newly determined opening difference 5.
And step S380, determining the opening degree adjusting value to be the maximum integer smaller than or equal to the opening degree difference value.
Specifically, the present embodiment further performs, before calculating the opening degree difference, a step of determining the constant c, including:
and determining the current outdoor environment temperature, and determining a preset constant value corresponding to a preset temperature interval as the constant c according to the preset temperature interval in which the outdoor environment temperature falls.
Optionally, after the step of determining an opening adjustment value of the electronic expansion valve and controlling the electronic expansion valve to adjust the opening according to the opening adjustment value, with reference to fig. 3, the following steps are further performed:
step S500, determining an absolute value of the exhaust temperature difference;
the exhaust temperature difference is the difference between the exhaust temperature after the first duration and the target exhaust temperature, and may be a positive number or a negative number under different working conditions. In the step, after the electronic expansion valve is controlled to adjust the opening degree, the absolute value of the exhaust temperature difference is determined.
S600, determining a second preset difference interval in which the absolute value of the exhaust temperature difference falls;
specifically, the air conditioner storage module is pre-stored with a plurality of second preset difference intervals, such as two second preset difference intervals, which are [0,3) (including 0, not including 3) and [3, ∞) (including 3, and all values greater than 3).
When the absolute value of the exhaust temperature value is determined to be 2.3, it is determined to fall within the [0,3) interval.
Step S700, determining a preset time length value corresponding to the second preset difference interval;
specifically, the different second preset difference intervals correspond to different preset duration values. For example, the second predetermined difference interval [0,3) corresponds to a preset duration value of 2 minutes, and the second predetermined difference interval [3, ∞) corresponds to a preset duration value of 1 minute.
And when the absolute value of the exhaust temperature value is determined to be 2.3 and falls into a second preset difference interval [0,3 ], determining that the corresponding preset duration value is 2 minutes.
And step S800, after the preset time length value is operated, returning to the step S100 again.
After controlling the air conditioner to operate for 2 minutes, returning to the step S100 again, and acquiring the outdoor environment temperature before and after the first time period, and the compressor operation frequency and the exhaust temperature after the first time period again; determining the difference value of the outdoor environment temperature after the first time period and before the first time period, and determining a target exhaust temperature according to the exhaust temperature after the first time period and the compressor operation frequency; determining an opening adjustment value of the electronic expansion valve according to the difference value between the target exhaust temperature and the outdoor environment temperature; and controlling the electronic expansion valve to adjust the opening according to the opening adjustment value so as to realize cycle control.
Specifically, this embodiment further provides a specific implementation manner of an opening degree control device for an electronic expansion valve of an air conditioner, including:
the acquisition module is used for acquiring the outdoor environment temperature, the compressor running frequency and the compressor exhaust temperature;
the processing module is used for recording the operation time length, determining the difference value of the outdoor environment temperature after the operation for the first time length and before the operation for the first time length, and determining the target exhaust temperature according to the exhaust temperature after the first time length and the operation frequency of the compressor; determining an opening adjustment value of the electronic expansion valve according to the difference value between the target exhaust temperature and the outdoor environment temperature;
and the control module is used for controlling the electronic expansion valve to adjust the opening according to the opening adjustment value.
The following describes an opening degree control device for an electronic expansion valve of an air conditioner according to the present invention, and the opening degree control device for an electronic expansion valve of an air conditioner described below and the opening degree control method for an electronic expansion valve of an air conditioner described above may be referred to in correspondence to each other.
Fig. 4 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 4: a processor (processor)110, a communication Interface (Communications Interface)120, a memory (memory)130 and a communication bus 140, wherein the processor 110, the communication Interface 120 and the memory 130 communicate with each other via the communication bus 140. The processor 110 may invoke logic instructions in the memory 130 to perform an electronic expansion valve opening control method comprising: operating for a first time period, and acquiring the outdoor environment temperature before and after the first time period, and the operating frequency and the exhaust temperature of the compressor after the first time period; determining the difference between the outdoor environment temperature after the first time period and the outdoor environment temperature before the first time period, and determining a target exhaust temperature according to the exhaust temperature after the first time period and the compressor operating frequency; determining an opening adjustment value of the electronic expansion valve according to the difference value between the target exhaust temperature and the outdoor environment temperature; and controlling the electronic expansion valve to adjust the opening according to the opening adjustment value.
In addition, the logic instructions in the memory 130 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, the computer program product including a computer program, the computer program being stored on a non-transitory computer-readable storage medium, wherein when the computer program is executed by a processor, the computer is capable of executing the method for controlling the opening of an electronic expansion valve provided by the above methods, the method including: operating for a first time period, and acquiring the outdoor environment temperature before and after the first time period, and the operating frequency and the exhaust temperature of the compressor after the first time period; determining the difference between the outdoor environment temperature after the first time period and the outdoor environment temperature before the first time period, and determining a target exhaust temperature according to the exhaust temperature after the first time period and the compressor operating frequency; determining an opening adjustment value of the electronic expansion valve according to the difference value between the target exhaust temperature and the outdoor environment temperature; and controlling the electronic expansion valve to adjust the opening according to the opening adjustment value.
In still another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, the computer program being implemented by a processor to perform the method for controlling the opening degree of an electronic expansion valve provided by the above methods, the method including: operating for a first time period, and acquiring the outdoor environment temperature before and after the first time period, and the operating frequency and the exhaust temperature of the compressor after the first time period; determining the difference between the outdoor environment temperature after the first time period and the outdoor environment temperature before the first time period, and determining a target exhaust temperature according to the exhaust temperature after the first time period and the compressor operating frequency; determining an opening adjustment value of the electronic expansion valve according to the difference value between the target exhaust temperature and the outdoor environment temperature; and controlling the electronic expansion valve to adjust the opening according to the opening adjustment value.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on the understanding, the above technical solutions substantially or otherwise contributing to the prior art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the various embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and 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 (10)

1. An opening control method of an electronic expansion valve is characterized by comprising the following steps:
operating for a first time period, and acquiring the outdoor environment temperature before and after the first time period, and the operating frequency and the exhaust temperature of the compressor after the first time period;
determining a target discharge temperature according to the outdoor environment temperature before and after the first time period and the compressor operation frequency;
determining the difference value of the outdoor environment temperature after the first time length and before the first time length, and determining the opening degree adjustment value of the electronic expansion valve according to the target exhaust temperature and the difference value of the outdoor environment temperature;
and controlling the electronic expansion valve to adjust the opening according to the opening adjustment value.
2. The method of claim 1, wherein the step of determining an electronic expansion valve opening adjustment value based on the difference between the target discharge temperature and the outdoor ambient temperature comprises:
and determining the exhaust temperature difference value between the exhaust temperature after the first time period and the target exhaust temperature, and determining the opening degree adjustment value of the electronic expansion valve according to the exhaust temperature difference value and the outdoor environment temperature difference value.
3. The method of claim 2, wherein the calculating formula for determining the adjustment value of the opening degree of the electronic expansion valve according to the difference between the exhaust temperature and the difference between the outdoor ambient temperature comprises:
ΔY＝a×ΔT p +b×ΔT h +c；
wherein Δ Y is an opening difference, and Δ T p For said difference in exhaust gas temperature, said Δ T h Taking the outdoor environment temperature difference value, wherein a and b are coefficients, and c is a constant;
the opening degree adjustment value is the largest integer smaller than or equal to the opening degree difference value.
4. The method of controlling the opening degree of the electronic expansion valve according to claim 3, further comprising, after calculating the opening degree difference, the steps of:
determining an absolute value of the exhaust temperature difference;
determining a first preset difference interval in which the absolute value of the exhaust temperature difference falls;
determining a preset opening degree interval corresponding to the first preset difference value interval;
determining that the calculated opening difference value does not fall into the preset opening interval;
determining an end value closest to the opening difference value in the two end values of the preset opening interval as a target difference value;
and controlling the numerical value of the opening difference value to be changed into the numerical value of the target difference value.
5. The electronic expansion valve opening degree control method according to claim 3, wherein the step of determining the constant c is further performed before calculating the opening degree difference value, and includes:
and determining the current outdoor environment temperature, and determining a preset constant value corresponding to a preset temperature interval as the constant c according to the preset temperature interval in which the outdoor environment temperature falls.
6. The method for controlling the opening degree of the electronic expansion valve according to any one of claims 3 to 5, wherein after the step of determining an opening degree adjustment value of the electronic expansion valve and controlling the opening degree of the electronic expansion valve according to the opening degree adjustment value, the following steps are further performed:
determining an absolute value of the exhaust temperature difference;
determining a second preset difference interval in which the absolute value of the exhaust temperature difference falls;
determining a preset time length value corresponding to the second preset difference interval;
after the preset time length value is operated, the outdoor environment temperature before and after the preset time length, and the compressor operation frequency and the exhaust temperature after the preset time length are obtained again;
determining the difference value of the outdoor environment temperature after the preset time length and before the preset time length, and determining a target exhaust temperature according to the exhaust temperature after the preset time length and the compressor operation frequency;
determining an opening adjustment value of the electronic expansion valve according to the difference value between the target exhaust temperature and the outdoor environment temperature;
and controlling the electronic expansion valve to adjust the opening according to the opening adjustment value.
7. An opening control device for an electronic expansion valve of an air conditioner is characterized by comprising:
the acquisition module is used for acquiring the outdoor environment temperature, the compressor operation frequency and the compressor exhaust temperature;
the processing module is used for recording the operation time length, determining the difference value of the outdoor environment temperature after the first time length is operated and before the first time length is operated, and determining the target exhaust temperature according to the exhaust temperature after the first time length and the operation frequency of the compressor; determining an opening adjustment value of the electronic expansion valve according to the difference value between the target exhaust temperature and the outdoor environment temperature;
and the control module is used for controlling the electronic expansion valve to adjust the opening according to the opening adjustment value.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the method of controlling the opening of the electronic expansion valve according to any one of claims 1 to 6.
9. A non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the electronic expansion valve opening degree control method according to any one of claims 1 to 6.
10. A computer program product comprising a computer program, wherein the computer program, when executed by a processor, implements the method of controlling the opening of an electronic expansion valve according to any one of claims 1 to 6.
CN202210352047.9A 2022-04-02 2022-04-02 Electronic expansion valve opening degree control method, device, equipment, medium and product Pending CN114923297A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08200843A (en) * 1995-01-27 1996-08-06 Toshiba Corp Superheat controlling apparatus for refrigeration cycle
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