CN113339985B - Control method and control device for air conditioner electronic expansion valve and air conditioner - Google Patents

Control method and control device for air conditioner electronic expansion valve and air conditioner Download PDF

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Publication number
CN113339985B
CN113339985B CN202110587165.3A CN202110587165A CN113339985B CN 113339985 B CN113339985 B CN 113339985B CN 202110587165 A CN202110587165 A CN 202110587165A CN 113339985 B CN113339985 B CN 113339985B
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China
Prior art keywords
current
expansion valve
electronic expansion
air conditioner
temperature
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CN202110587165.3A
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Chinese (zh)
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CN113339985A (en
Inventor
鞠龙家
张飞
谭强
陈建龙
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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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Priority to CN202110587165.3A priority Critical patent/CN113339985B/en
Publication of CN113339985A publication Critical patent/CN113339985A/en
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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
    • 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
    • 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
    • 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
    • F25B2600/25—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
    • F25B2700/2106—Temperatures of fresh outdoor 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
    • 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 application relates to the technical field of intelligent household appliances, and discloses a control method for an electronic expansion valve of an air conditioner, which comprises the following steps: acquiring the current outdoor environment temperature; acquiring the current exhaust temperature under the condition that the current outdoor environment temperature is greater than or equal to the preset temperature; correcting an adjusting parameter in a preset control strategy of the electronic expansion valve according to the current outdoor environment temperature and the current exhaust temperature; controlling the electronic expansion valve to adjust the opening degree under the corrected adjusting parameter; the preset control strategy of the electronic expansion valve is a linear relation between the opening degree of the electronic expansion valve and the current operating frequency of the compressor. The method can improve the stability of the air conditioner operation and is beneficial to the air conditioner to realize quick refrigeration. The application also discloses a control device of the air conditioner electronic expansion valve and an air conditioner.

Description

Control method and control device for air conditioner electronic expansion valve and air conditioner
Technical Field
The present disclosure relates to the field of intelligent home appliances, and more particularly, to a control method and device for an electronic expansion valve of an air conditioner, and an air conditioner.
Background
At present, the exhaust temperature of an air conditioner is mainly adjusted by adjusting the opening degree of an electronic expansion valve; the electronic expansion valve opening degree adjustment is realized based on the exhaust temperature and the target temperature, namely when the exhaust temperature is higher than the target temperature, the opening degree of the electronic expansion valve is increased; and when the exhaust temperature is lower than the target temperature, the opening degree of the electronic expansion valve is reduced.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
with the application of the R32 refrigerant, the pressure of the air conditioner refrigerant is continuously increased, and under some severe working conditions, the opening degree of the electronic expansion valve is still adjusted according to the principle, so that the superheat degree of the air conditioner is caused, the fault of an air conditioner compressor is easily caused, and the shutdown of the air conditioner is caused.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended to be a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a control method and a control device for an electronic expansion valve of an air conditioner and the air conditioner, which aim to solve the technical problem that the electronic expansion valve is adjusted to be easily stopped when the air conditioner runs under high load in a severe environment.
In some embodiments, the method comprises: acquiring the current outdoor environment temperature; acquiring the current exhaust temperature under the condition that the current outdoor environment temperature is greater than or equal to the preset temperature; correcting the adjusting parameters in the preset control strategy of the electronic expansion valve according to the current outdoor environment temperature and the current exhaust temperature; controlling the electronic expansion valve to adjust the opening degree under the corrected adjusting parameter; the preset control strategy of the electronic expansion valve comprises a linear relation between the opening degree of the electronic expansion valve and the current operating frequency of the compressor.
In some embodiments, the apparatus comprises: a first acquisition module configured to acquire an outdoor ambient temperature; a second acquisition module configured to acquire a discharge temperature in a case where the outdoor ambient temperature is greater than or equal to a preset temperature; a correction module configured to correct a regulation parameter in a preset control strategy of the electronic expansion valve according to the outdoor environment temperature and the exhaust temperature; the preset control strategy of the electronic expansion valve is a linear relation between the opening degree of the electronic expansion valve and the current operating frequency of the compressor; and the control module is configured to control the electronic expansion valve to adjust the opening degree under the corrected adjusting parameter.
In some embodiments, the air conditioner includes: the control device for the electronic expansion valve of the air conditioner is disclosed.
The control method, the control device and the air conditioner for the electronic expansion valve of the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:
under severe working conditions, particularly under high temperature conditions, according to a preset control strategy of the electronic expansion valve, under different environmental temperatures, adopting different adjusting parameters to adjust the linear relation between the opening of the electronic expansion valve and the current compressor operation frequency; based on the outdoor environment temperature and the exhaust temperature, the adjusting parameters of the electronic expansion valve are corrected, and the electronic expansion valve is controlled to adjust the opening according to the corrected adjusting parameters, so that the running stability of the air conditioner is improved, and meanwhile, the air conditioner is favorable for realizing quick refrigeration.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a schematic diagram of a control method for an electronic expansion valve of an air conditioner according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a control device for an electronic expansion valve of an air conditioner according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of another control device for an electronic expansion valve of an air conditioner according to an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and advantages of the embodiments of the present disclosure can be understood in detail, a more particular description of the embodiments of the disclosure, briefly summarized above, may be had by reference to the appended drawings, which are included to illustrate, but are not intended to limit the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
Referring to fig. 1, an embodiment of the present disclosure provides a control method for an electronic expansion valve of an air conditioner, including:
and S01, the air conditioner controller acquires the current outdoor environment temperature.
In this embodiment, a temperature sensor may be disposed on the outdoor unit of the air conditioner, and the air conditioner controller obtains the current outdoor ambient temperature through the temperature sensor; or, the air conditioner controller may be connected with the cloud server, and the temperature information of the area where the target air conditioner is located is obtained from the cloud server, so as to obtain the current outdoor environment temperature; thus, the outdoor ambient temperature can be accurately acquired.
And S02, the air conditioner controller acquires the current exhaust temperature under the condition that the current outdoor environment temperature is greater than or equal to the preset temperature.
In this embodiment, if the current outdoor environment temperature is greater than or equal to the preset temperature, it indicates that the outdoor environment temperature is high, and at this time, it may be determined that the air conditioner operating environment is severe, and the opening degree of the electronic expansion valve needs to be adjusted according to a preset control strategy, and further, the exhaust temperature of the air conditioner compressor is obtained to adjust the opening degree of the electronic expansion valve. A temperature sensor can be arranged on the connecting pipe of the air outlet of the compressor to detect the air exhaust temperature of the compressor; alternatively, a semiconductor point thermometer may be provided at the compressor discharge port to detect the discharge temperature of the compressor. The preset temperature is a critical value used for determining whether the air conditioner operating environment is severe, and here, setting the preset temperature to be higher than or equal to 30 ℃ is a severe environment, specifically, the preset temperature may be 30 ℃, 32 ℃, or other temperature values, and the preset temperature is not limited in detail here.
S03, the air conditioner controller corrects adjusting parameters in a preset control strategy of the electronic expansion valve according to the current outdoor environment temperature and the current exhaust temperature; the preset control strategy of the electronic expansion valve comprises a linear relation between the opening degree of the electronic expansion valve and the current running frequency of the compressor.
In this embodiment, if it is determined that the current outdoor environment temperature is high, the adjustment parameter in the preset control strategy of the electronic expansion valve is corrected according to the current outdoor environment temperature and the current exhaust temperature, wherein the opening degree of the electronic expansion valve and the current operating frequency of the compressor have a linear relationship; specifically, the linear relationship between the opening degree of the electronic expansion valve and the current operating frequency of the compressor may be a linear equation of unity, or may be a linear equation of two, or may be a quadratic equation of two, etc.; therefore, according to the current outdoor environment temperature and the current exhaust temperature, the adjusting parameters in the control strategy are corrected, so that the adjustment of the electronic expansion valve can meet the requirements. The outdoor environment temperature and the current exhaust temperature can be divided into different sections, each section corresponds to different adjusting parameters, the adjusting parameters are obtained according to the corresponding relation between the temperature and the adjusting parameters, then the linear relation between the opening of the electronic expansion valve after the adjusting parameters are corrected and the current compressor operation frequency is obtained, and the opening of the electronic expansion valve is adjusted according to the corrected linear relation. In addition, the outdoor environment temperature and the current exhaust temperature may be in direct proportion to the adjustment parameter, that is, the higher the outdoor environment temperature is, the larger the adjustment parameter is, and/or the higher the current exhaust temperature is, the larger the adjustment parameter is.
As an example, when a linear relationship between the opening degree of the electronic expansion valve and the current compressor operation frequency is a one-dimensional linear equation, for example, Y = a × f, Y denotes the opening degree of the electronic expansion valve, f denotes the current compressor operation frequency, and a denotes an adjustment parameter determined based on the air conditioner operation; the adjusting parameter is only a, when the adjusting parameter is corrected according to the current outdoor environment temperature and the current exhaust temperature, the priority can be set, and the adjusting parameter is corrected according to the priority; for example, if the priority of the current exhaust temperature is high, the adjusting parameters are corrected according to the current exhaust temperature; alternatively, the adjustment parameters may be modified according to the current outdoor ambient temperature and the current exhaust temperature, respectively, and the final adjustment parameter may be selected preferentially, for example, the adjustment parameter may be selected to be modified more greatly. As another example, when the linear relationship between the opening degree of the electronic expansion valve and the current compressor operation frequency is a linear equation of two primary or two secondary equations, for example, Y = a f 2 + b, Y denotes an opening degree of the electronic expansion valve, f denotes an operation frequency of the current compressor, a denotes a first adjustment parameter determined based on the air-conditioning operation, and b denotes a second adjustment parameter determined based on the air-conditioning operation. (ii) a The adjusting parameters are a and b, the current outdoor environment temperature can be set to correspond to one adjusting parameter a, the current exhaust temperature corresponds to the other adjusting parameter b, therefore, different adjusting parameters are respectively corrected according to different influence factors, and the control accuracy can be improved.
And S04, controlling the electronic expansion valve to adjust the opening degree under the corrected adjusting parameter by the air conditioner controller.
In this embodiment, after the corrected adjustment parameter is determined, the electronic expansion valve is controlled to adjust the opening degree under the corrected adjustment parameter and the current compressor frequency. Therefore, the environment-adapting capacity of the compressor can be improved by correcting the adjusting parameters, and the shutdown risk of the compressor under high load is avoided; the stability of the air conditioner operation is improved, and the air conditioner can realize quick refrigeration.
Optionally, in step S03, the determining of the preset control strategy of the electronic expansion valve includes: the opening degree of the electronic expansion valve is calculated according to the following formula,
Y＝a*f+b
where Y denotes an opening degree of the electronic expansion valve, f denotes an operation frequency of the current compressor, a denotes a first adjustment parameter determined based on the air-conditioning operation, and b denotes a second adjustment parameter determined based on the air-conditioning operation.
In this embodiment, the linear relationship between the opening degree of the electronic expansion valve and the current operating frequency of the compressor is a linear equation of two-dimensional, and the linear equation has two parameters, namely a first adjusting parameter and a second adjusting parameter. In some embodiments, the adjustment parameter varies with a change in the current outdoor environment temperature and the current exhaust temperature, or when a specific condition is satisfied, the adjustment parameter varies with a change in the current outdoor environment temperature and the current exhaust temperature, and when the specific condition is not satisfied, the adjustment parameter is a fixed value and does not vary with the current outdoor environment temperature and the current exhaust temperature; here, the specific condition may be that the current outdoor ambient temperature is greater than a preset temperature. Therefore, the opening of the electronic expansion valve is controlled in a segmented mode according to different conditions, the electronic expansion valve can better adapt to the ambient temperature, and the normal operation of the air conditioner is guaranteed.
Optionally, step S02, modifying an adjustment parameter of a preset control strategy of the electronic expansion valve according to the outdoor environment temperature and the exhaust temperature; the method comprises the following steps: determining a current first correction factor corresponding to the current outdoor environment temperature according to the corresponding relation between the current outdoor environment temperature and the first correction factor; correcting the first adjusting parameter based on the current first correction factor; determining a current second correction factor corresponding to the current exhaust temperature according to the corresponding relation between the current exhaust temperature and the second correction factor; and modifying the second adjustment parameter based on the current second modification factor.
In this embodiment, the adjustment parameter is corrected by the correction factor, and specifically, the current outdoor environment temperature is determined according to the corresponding relationship between the current outdoor environment temperature and the first correction factorA first previous correction factor; the corresponding relationship between the current outdoor environment temperature and the first correction factor may be that the current outdoor environment temperature is directly proportional to the first correction factor, that is, the higher the current outdoor environment temperature is, the larger the first correction factor is; alternatively, the current outdoor environment temperature interval may be in one-to-one correspondence with the first correction factor, for example, the current outdoor environment temperature is divided into five temperature intervals, the first temperature interval is equal to or less than 30 ℃, the second temperature interval is greater than 30 ℃ and less than or equal to 35 ℃, the third temperature interval is greater than 35 ℃ and less than or equal to 40 ℃, the fourth temperature interval is greater than 40 ℃ and less than or equal to 45 ℃, the fifth temperature interval is greater than 45 ℃, and the corresponding first correction factors are respectively K 1 ～K 5 . Thus, the current correction factor is determined based on the obtained current outdoor ambient temperature.
Furthermore, based on the current first correction factor, correcting the first adjustment parameter; the relationship between the first adjusting parameter and the current first correction factor may be that the current first correction factor is added to the first adjusting parameter; for example, the first adjustment parameter is a, based on the current first correction factor k 1 The first adjusted parameter after correction is k 1 + a; or, the current first correction factor may be multiplied on the basis of the first adjustment parameter; for example, the first adjustment parameter is a, based on the current first correction factor k 1 The first adjusted parameter after correction is k 1 * a or a (1+k) 1 )。
Similarly, a current second correction factor corresponding to the current exhaust temperature can be determined according to the corresponding relationship between the current exhaust temperature and the second correction factor; and modifying the second adjustment parameter based on the current second modification factor. Therefore, a correction factor is determined based on the environment temperature and the exhaust temperature, and the adjustment parameter is corrected through the correction factor, so that the corrected opening degree of the electronic expansion valve is ensured to be suitable for the environment requirement, and the air conditioner can run under various environments.
Optionally, modifying the first adjustment parameter based on the current first modification factor and modifying the second adjustment parameter based on the current second modification factor includes: respectively calculating the correction according to the following formulaThe first and second directly subsequent manipulated variables, a' = a k a ，b'＝b*k b (ii) a Wherein k is a Representing the current first correction factor, k b Representing the current second correction factor, a 'representing the corrected first adjustment parameter, b' representing the corrected second adjustment parameter.
In the embodiment, a first adjusting parameter and a second adjusting parameter determined by the operation of the air conditioner are respectively corrected based on a first correction factor and a second correction factor; the corrected adjusting parameters meet the requirements of the current outdoor environment temperature and the current exhaust temperature, so that the opening degree of the electronic expansion valve can adapt to the external environment, and the running stability of the air conditioner is improved.
Optionally, the determining of the correspondence between the current outdoor ambient temperature and the first correction factor, and the correspondence between the current discharge temperature and the second correction factor, includes: the current outdoor environment temperature is positively correlated with the first correction factor; the current exhaust temperature is positively correlated with the second correction factor.
In this embodiment, the positive correlation between the current outdoor environment temperature and the first correction factor may be that a certain proportionality coefficient exists between the current outdoor environment temperature and the first correction factor, or may be that the first correction factor becomes larger as the current outdoor environment temperature increases, for example, the first correction factor increases by 0.3 every time the current outdoor environment temperature increases by 5 ℃; likewise, so does the current exhaust temperature and the second correction factor. Thus, the current correction factor can be obtained according to the preset corresponding relation.
Optionally, the control method for the electronic expansion valve of the air conditioner further includes step S05, determining that an adjustment parameter in a preset control strategy of the electronic expansion valve is a fixed value when the outdoor environment temperature is lower than the preset temperature; and controlling the electronic expansion valve to adjust the opening degree under the adjustment parameter.
In this embodiment, if the outdoor ambient temperature is lower than the preset temperature, the electronic expansion valve is controlled to operate under the adjustment parameter determined by the operation of the air conditioner without correcting the adjustment parameter in the preset control strategy of the electronic expansion valve; therefore, under the condition that the outdoor environment temperature is not high, the adjusting parameters determined by the operation of the air conditioner can adapt to the external environment, and the condition of stable operation of the air conditioner is met.
Optionally, step S04 further includes: after the air conditioner runs for a set time under the adjusted opening degree, acquiring a new exhaust temperature; and controlling the electronic expansion valve to adjust the opening according to the new exhaust temperature and the preset target exhaust temperature.
In this embodiment, after the air conditioner operates for a set time period under the opening degree adjusted by the electronic expansion valve, the air conditioner achieves a quick refrigeration effect, at this time, the air conditioner enters a stable operation stage, the adjustment of the opening degree of the electronic expansion valve can be adjusted according to the relationship between the obtained new exhaust temperature and the preset target exhaust temperature, and in this stage, the opening degree of the electronic expansion valve is adjusted by generally adopting a PID (proportional-integral-derivative) control principle; wherein the set time period is generally 5-15 minutes.
Referring to fig. 2, an embodiment of the present disclosure provides a control device for an electronic expansion valve of an air conditioner, including a first obtaining module 21, a second obtaining module 22, a correcting module 23, and a control module 24. The first obtaining module 21 is configured to obtain an outdoor ambient temperature; the second obtaining module 22 is configured to obtain the exhaust temperature in a case where the outdoor ambient temperature is greater than or equal to a preset temperature; the correction module 23 is configured to correct the adjustment parameters in the preset control strategy of the electronic expansion valve according to the outdoor ambient temperature and the exhaust temperature; the preset control strategy of the electronic expansion valve comprises a linear relation between the opening degree of the electronic expansion valve and the current operating frequency of the compressor; the control module 24 is configured to control the electronic expansion valve to adjust the opening degree under the modified adjustment parameter.
By adopting the control device for the electronic expansion valve of the air conditioner, according to the preset control strategy of the electronic expansion valve, under different environmental temperatures, the linear relation between the opening of the electronic expansion valve and the current operation frequency of the compressor is adjusted by adopting different adjusting parameters; based on the outdoor environment temperature and the exhaust temperature, the adjusting parameters of the electronic expansion valve are corrected, and the electronic expansion valve is controlled to adjust the opening according to the corrected adjusting parameters, so that the stability of the operation of the air conditioner is improved, and meanwhile, the air conditioner is favorable for realizing quick refrigeration.
Referring to fig. 3, an embodiment of the present disclosure provides a control device for an electronic expansion valve of an air conditioner, including a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may also include a Communication Interface (Communication Interface) 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via a bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to execute the control method for the air conditioner electronic expansion valve of the above embodiment.
In addition, the logic instructions in the memory 101 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.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by executing program instructions/modules stored in the memory 101, that is, implements the control method for the electronic expansion valve of the air conditioner in the above-described embodiment.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides an air conditioner, which comprises the control device for the electronic expansion valve of the air conditioner.
The embodiment of the disclosure provides a computer-readable storage medium, which stores computer-executable instructions configured to execute the control method for the air conditioner electronic expansion valve.
The disclosed embodiments provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the above-described control method for an electronic expansion valve of an air conditioner.
The computer readable storage medium described above may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable 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 of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: 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, and may also be a transient storage medium.
The above description and the drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising a …" does not exclude the presence of additional like elements in a process, method, or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosure, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. 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 position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims (9)

1. A control method for an electronic expansion valve of an air conditioner, comprising:
acquiring the current outdoor environment temperature;
acquiring the current exhaust temperature under the condition that the current outdoor environment temperature is greater than or equal to the preset temperature;
correcting the adjusting parameters in the preset control strategy of the electronic expansion valve according to the current outdoor environment temperature and the current exhaust temperature;
controlling the electronic expansion valve to adjust the opening degree under the corrected adjusting parameter;
the preset control strategy of the electronic expansion valve comprises a linear relation between the opening degree of the electronic expansion valve and the current operating frequency of the compressor; i.e. Y = a f + b; y represents the opening degree of the electronic expansion valve, f represents the current operation frequency of the compressor, a represents a first adjusting parameter determined based on the operation of an air conditioner, and the first adjusting parameter is corrected based on the current indoor environment temperature; b represents a second adjusting parameter determined based on the air conditioner operation, and the second adjusting parameter is corrected based on the current exhaust temperature.
2. The control method of claim 1, wherein said modifying the adjustment parameters in the preset control strategy of the electronic expansion valve based on the outdoor ambient temperature and the discharge temperature comprises:
determining a current first correction factor corresponding to the current outdoor environment temperature according to the corresponding relation between the current outdoor environment temperature and the first correction factor, and correcting the first adjusting parameter based on the current first correction factor;
and determining a current second correction factor corresponding to the current exhaust temperature according to the corresponding relation between the current exhaust temperature and the second correction factor, and correcting the second adjusting parameter based on the current second correction factor.
3. The control method of claim 2, wherein said modifying said first adjustment parameter based on said current first correction factor and said modifying said second adjustment parameter based on said current second correction factor comprises:
determining the modified first adjusting parameter and the second adjusting parameter according to the following formulas,
a'＝a*k a
b'＝b*k b
wherein k is a Representing the current first correction factor, k b Representing the current second correction factor, a 'representing the corrected first adjustment parameter, b' representing the corrected second adjustment parameter.
4. The control method according to claim 2, wherein the determination of the correspondence relationship between the current outdoor ambient temperature and the first correction factor, and the correspondence relationship between the current discharge air temperature and the second correction factor, includes:
the current outdoor ambient temperature is positively correlated with a first correction factor, and the current exhaust temperature is positively correlated with a second correction factor.
5. The control method according to claim 1, characterized by further comprising:
determining that the adjusting parameter in the preset control strategy of the electronic expansion valve is a fixed value under the condition that the outdoor environment temperature is lower than the preset temperature;
and controlling the electronic expansion valve to adjust the opening degree under the adjusting parameter.
6. The control method according to any one of claims 1-5, wherein after controlling the electronic expansion valve to adjust the opening degree under the modified adjustment parameter, the method further comprises:
after the air conditioner runs for a set time under the adjusted opening degree, acquiring a new exhaust temperature;
and controlling the electronic expansion valve to adjust the opening according to the new exhaust temperature and a preset target exhaust temperature.
7. A control device for an electronic expansion valve of an air conditioner is characterized by comprising:
a first acquisition module configured to acquire an outdoor ambient temperature;
a second acquisition module configured to acquire a discharge temperature in a case where the outdoor ambient temperature is greater than or equal to a preset temperature;
a correction module configured to correct an adjustment parameter in a preset control strategy of the electronic expansion valve according to the outdoor environment temperature and the exhaust temperature, wherein the preset control strategy of the electronic expansion valve includes a linear relationship between an opening degree of the electronic expansion valve and an operating frequency of a current compressor: y = a f + b; y represents the opening degree of the electronic expansion valve, f represents the current operation frequency of the compressor, a represents a first adjusting parameter determined based on the operation of an air conditioner, and the first adjusting parameter is corrected based on the current indoor environment temperature; b represents a second adjusting parameter determined based on the operation of the air conditioner, and the second adjusting parameter is corrected based on the current exhaust temperature;
and the control module is configured to control the electronic expansion valve to adjust the opening degree under the corrected adjusting parameter.
8. A control device for an electronic expansion valve of an air conditioner, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute the control method for an electronic expansion valve of an air conditioner according to any one of claims 1 to 6 when executing the program instructions.
9. An air conditioner characterized by comprising the control device for an electronic expansion valve of an air conditioner according to claim 7 or 8.
CN202110587165.3A 2021-05-27 2021-05-27 Control method and control device for air conditioner electronic expansion valve and air conditioner Active CN113339985B (en)

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