WO2022217936A1 - Procédé et dispositif de commande pour climatiseur et climatiseur - Google Patents

Procédé et dispositif de commande pour climatiseur et climatiseur Download PDF

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Publication number
WO2022217936A1
WO2022217936A1 PCT/CN2021/133332 CN2021133332W WO2022217936A1 WO 2022217936 A1 WO2022217936 A1 WO 2022217936A1 CN 2021133332 W CN2021133332 W CN 2021133332W WO 2022217936 A1 WO2022217936 A1 WO 2022217936A1
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WIPO (PCT)
Prior art keywords
exhaust gas
gas temperature
current
temperature
change rate
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PCT/CN2021/133332
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English (en)
Chinese (zh)
Inventor
罗荣邦
崔俊
Original Assignee
青岛海尔空调器有限总公司
青岛海尔空调电子有限公司
海尔智家股份有限公司
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Publication of WO2022217936A1 publication Critical patent/WO2022217936A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • 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

Definitions

  • the present application relates to the technical field of air conditioning, and in particular, to a control method and device for an air conditioner, and an air conditioner.
  • the target exhaust temperature of an air-conditioning compressor is an important parameter that affects the operating state of the air conditioner.
  • the calculation formula of the target exhaust temperature is generally fitted according to a large number of experiments in the industry.
  • the calculation logic of the target exhaust temperature is preset, but When the ambient temperature is low and the air conditioner is heating, the surface of the outdoor heat exchanger is prone to frost, and the actual exhaust temperature will decrease as the thickness of the frost layer increases. In order to meet the target exhaust temperature, the valve opening will become smaller, and then Frosting will be more serious and enter a vicious circle, which will eventually lead to large fluctuations in indoor temperature and poor heating effect of air conditioners.
  • the target exhaust temperature is determined according to the frequency of the compressor and the external ambient temperature.
  • the air conditioner is frequently frosted and defrosted because the target exhaust temperature cannot be adjusted, resulting in large fluctuations in the indoor temperature.
  • Embodiments of the present disclosure provide a control method, device, and air conditioner for an air conditioner, so as to solve the problem of large fluctuations in indoor temperature caused by frequent frosting and defrosting of the air conditioner when the air conditioner is heated at a low temperature.
  • a control method for an air conditioner comprising:
  • the target exhaust gas temperature is corrected according to the current correction value to reduce the difference between the corrected target exhaust gas temperature and the latest exhaust gas temperature collected in the current control period.
  • determining the current correction value corresponding to the current exhaust gas temperature change rate according to the corresponding relationship between the exhaust gas temperature change rate and the target exhaust gas temperature correction value includes:
  • K is the exhaust gas temperature change rate
  • T is the target exhaust gas temperature correction value
  • a is in the range of 0 to 0.1
  • b is in the range of 0.1 to 0.5
  • c is in the range of 0.6 to 1
  • d is in the range of 1 to 1.5
  • e ranges from 1.5 to 2.
  • control method further includes:
  • control method further includes:
  • the preset control period is the preset sampling period is an integer multiple of , then when the valve opening of the throttle element is adjusted to the maximum opening, stop correcting the target exhaust temperature, including:
  • stopping the correction of the target exhaust gas temperature includes:
  • control method further includes:
  • the compressor exhaust gas temperature after a set period of time is collected as a new exhaust gas temperature of the compressor.
  • a control device for an air conditioner comprising:
  • an acquiring unit configured to continue to acquire a new exhaust temperature of the compressor after determining that the exhaust temperature of the compressor reaches the target exhaust temperature
  • a calculation unit configured to determine, according to a preset control period, the current exhaust gas temperature change rate corresponding to the new exhaust gas temperature collected in the current control period;
  • a correction unit configured to determine a current correction value corresponding to the current rate of change of the exhaust gas temperature according to the correspondence between the rate of change of the exhaust gas temperature and the correction value of the target exhaust gas temperature;
  • An adjustment unit configured to correct the target exhaust gas temperature according to the current correction value, so as to reduce the difference between the corrected target exhaust gas temperature and the latest exhaust gas temperature collected in the current control period.
  • a control device for an air conditioner comprising a processor and a memory storing program instructions, the processor is configured to, when executing the program instructions, execute the above-described method for an air conditioner control method.
  • an air conditioner comprising the above-mentioned control device.
  • control method, device, and air conditioner for an air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:
  • the difference between the actual exhaust gas temperature and the target exhaust gas temperature can be obtained;
  • the difference between the exhaust temperature and the target exhaust temperature adjust the target exhaust temperature of the air conditioner according to the target exhaust temperature correction value.
  • FIG. 1 is a schematic diagram of a control method for an air conditioner provided by an embodiment of the present disclosure
  • FIG. 2 is a flowchart of a control method for an air conditioner provided by an embodiment of the present disclosure
  • FIG. 3 is a flowchart of another control method for an air conditioner provided by an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of a control device for an air conditioner provided by an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of another control device for an air conditioner provided by an embodiment of the present disclosure.
  • A/B means: A or B.
  • a and/or B means: A or B, or, A and B three relationships.
  • the general target exhaust temperature is set in advance according to the experimental data and the common ambient temperature range, so that adaptive changes cannot be made according to the actual environmental conditions, which weakens the operation effect of the air conditioner. For example, when the ambient temperature is low and the air conditioner is heating, if the target exhaust temperature is not adjusted, the air conditioner will defrost frequently, causing the indoor temperature to fluctuate. In order to make the air conditioning unit system operate stably, it is necessary to adjust the target exhaust temperature adaptively.
  • an embodiment of the present disclosure provides a control method for an air conditioner, the method comprising:
  • Step S01 after it is determined that the exhaust gas temperature of the compressor reaches the target exhaust gas temperature, continue to collect the new exhaust gas temperature of the compressor.
  • the discharge temperature refers to the actual discharge temperature of the compressor; the new discharge temperature refers to the changed actual discharge temperature.
  • the actual exhaust gas temperature For how to collect the actual exhaust gas temperature, reference may be made to related technologies, which will not be repeated here.
  • the collection of the exhaust gas temperature of the compressor may be to collect the actual exhaust gas temperature according to a preset sampling period, or to collect the actual exhaust gas temperature in real time, which is not limited here.
  • Step S02 determine the current exhaust gas temperature change rate corresponding to the new exhaust gas temperature collected in the current control period.
  • the preset control period is preset, which is used to express that the rate of change of the exhaust gas temperature is calculated every time a preset control period passes;
  • the current control period refers to collecting a new exhaust gas temperature according to the time length of the preset control period The cycle in which the moment of time falls.
  • Step S03 according to the corresponding relationship between the exhaust gas temperature change rate and the target exhaust gas temperature correction value, determine the current correction value corresponding to the current exhaust gas temperature change rate.
  • the current correction value is used to express the adjustment amount of the current target exhaust gas temperature.
  • K is the exhaust gas temperature change rate
  • T is the target exhaust gas temperature correction value
  • a is in the range of 0 to 0.1
  • b is in the range of 0.1 to 0.5
  • c is in the range of 0.6 to 1
  • d is in the range of 1 to 1.5
  • e The range is 1.5 to 2.
  • the larger the exhaust gas temperature change rate the larger the target exhaust gas temperature correction value.
  • a large change rate of exhaust gas temperature indicates that the gap between the actual exhaust gas temperature and the target exhaust gas temperature is large, and the target exhaust gas temperature needs to be reduced.
  • the correction value of the target exhaust gas temperature is large, which can reduce the difference between the corrected target exhaust gas temperature and the current The difference between the most recent exhaust temperatures.
  • a, b, c, d, and e are random numbers that take values within their respective intervals.
  • control method further includes:
  • the preset change rate is used to express the numerical change of the exhaust gas temperature in one control period.
  • the change rate of the exhaust gas temperature is less than the preset change rate, it means that the change rate of the exhaust gas temperature is small, and the actual exhaust gas temperature is not much different from the target exhaust gas temperature; when the change rate of the exhaust gas temperature is greater than or equal to the preset change rate
  • the rate of change of exhaust gas temperature is relatively large, it means that the change rate of exhaust gas temperature is relatively large, and there is a large gap between the actual exhaust gas temperature and the target exhaust gas temperature.
  • the value of the preset rate of change may be the value of a in the embodiment of the present disclosure, where a ranges from 0 to 0.1.
  • Step S04 correcting the target exhaust gas temperature according to the current correction value to reduce the difference between the corrected target exhaust gas temperature and the latest exhaust gas temperature collected in the current control period.
  • control method further includes: when the defrosting condition of the heat exchanger is satisfied or the valve opening degree of the throttling element is adjusted to the maximum opening degree, stopping the correction of the target exhaust gas temperature.
  • the throttling element refers to an element that can adjust the valve opening degree, and in the embodiment of the present disclosure, the throttling element may be an electronic expansion valve.
  • the air conditioner has already started to defrost, and it is no longer meaningful to correct the target exhaust gas temperature at this time; when the valve opening of the throttle element is adjusted to the maximum opening, the target The exhaust gas temperature cannot continue to decrease, so the correction of the target exhaust gas temperature is stopped.
  • the valve opening is adjusted to the maximum opening, stop correcting the target exhaust temperature, including: determining the current valve opening corresponding to the latest exhaust temperature according to the latest exhaust temperature collected in the current sampling period; If the degree is the maximum opening degree of the throttle element, the correction of the target exhaust gas temperature is stopped.
  • the detection frequency of the exhaust gas temperature is high, and it is possible to know whether the valve opening degree has reached the maximum opening degree according to the detected real-time exhaust gas temperature, and stop correcting the target exhaust gas temperature in time to reduce power consumption.
  • stopping the correction of the target exhaust gas temperature includes: determining the defrosting conditions corresponding to the current ambient temperature; when the temperature of the outdoor unit coil satisfies the defrosting conditions, Stop correcting the target exhaust temperature.
  • the air conditioner stops heating, and it is not necessary to correct the target exhaust gas temperature at this time.
  • the control method for air conditioning provided by the embodiment of the present disclosure, by obtaining the exhaust gas temperature and the rate of change of the exhaust gas temperature, the difference between the actual exhaust gas temperature and the target exhaust gas temperature can be known; according to the value of the rate of change of the exhaust gas temperature In the interval, the target exhaust temperature correction value is determined, thereby reducing the gap between the actual exhaust temperature and the target exhaust temperature; according to the target exhaust temperature correction value, the target exhaust temperature of the air conditioner is adjusted.
  • the target exhaust temperature can be corrected, thereby avoiding the fluctuation of indoor temperature caused by frequent defrosting of the air conditioner, so that the system of the air conditioner unit operates stably, the heating effect of the air conditioner is good, and the user experience is good.
  • FIG. 2 is a flowchart of a control method for an air conditioner provided by an embodiment of the present disclosure.
  • the control method for the air conditioner includes:
  • step S11 when the exhaust temperature of the compressor reaches the target exhaust temperature, the exhaust temperature of the compressor after the set time period is collected as the new exhaust temperature of the compressor.
  • the set time length is a preset time length, and is used to express the time during which the state in which the rate of change of the exhaust gas temperature is small continues.
  • the set time is not reached, the change rate of the exhaust temperature is relatively small, and the target exhaust temperature is not corrected; after the set time elapses, the change rate of the exhaust temperature is relatively large, and the exhaust temperature needs to be obtained according to the collected exhaust temperature. The value of the rate of change to correct the target exhaust gas temperature.
  • the setting of the set duration may refer to experimental data under typical working conditions in the research and development stage.
  • Step S12 determine the current exhaust gas temperature change rate corresponding to the new exhaust gas temperature collected in the current control period.
  • Step S13 Determine a current correction value corresponding to the current exhaust gas temperature change rate according to the corresponding relationship between the exhaust gas temperature change rate and the target exhaust gas temperature correction value.
  • Step S14 correcting the target exhaust gas temperature according to the current correction value, so as to reduce the difference between the corrected target exhaust gas temperature and the latest exhaust gas temperature collected in the current control period.
  • the unnecessary correction times can be reduced, Reduce power consumption; determine the target exhaust temperature correction value according to the numerical range of the exhaust temperature change rate, thereby reducing the gap between the actual exhaust temperature and the target exhaust temperature; adjust the air conditioning target according to the target exhaust temperature correction value Exhaust gas temperature.
  • the target exhaust temperature can be corrected, so that the air conditioning unit system operates stably, the heating effect of the air conditioning is good, the unnecessary correction times can be reduced, and the adjustment process can be simplified.
  • FIG. 3 is a flowchart of another control method for an air conditioner provided by an embodiment of the present disclosure. As shown in FIG. 3 , the control method for an air conditioner includes:
  • step S21 after it is determined that the exhaust gas temperature of the compressor reaches the target exhaust gas temperature, the collection of the new exhaust gas temperature of the compressor is continued.
  • Step S22 determine the current exhaust gas temperature change rate corresponding to the new exhaust gas temperature collected in the current control period.
  • Step S23 judging the magnitude relationship between the current exhaust gas temperature change rate and the preset change rate.
  • Step S24 when the current exhaust gas temperature change rate is smaller than the preset change rate, the target exhaust gas temperature is not corrected.
  • Step S25 when the current exhaust gas temperature change rate is greater than or equal to the preset change rate, determine the current correction value according to the corresponding relationship between the exhaust gas temperature change rate and the target exhaust gas temperature correction value.
  • Step S26 correcting the target exhaust gas temperature according to the current correction value to reduce the difference between the corrected target exhaust gas temperature and the latest exhaust gas temperature collected in the current control period.
  • the target exhaust gas temperature can be corrected to simplify the adjustment process; the target exhaust gas temperature is determined according to the numerical range of the rate of change of the exhaust gas temperature. Adjust the air temperature correction value, thereby reducing the gap between the actual exhaust temperature and the target exhaust temperature; adjust the target exhaust temperature of the air conditioner according to the target exhaust temperature correction value.
  • the target exhaust temperature can be corrected, so that the air-conditioning unit system operates stably, the air-conditioning heating effect is good, and at the same time, unnecessary correction times can be reduced, and power consumption can be reduced.
  • an embodiment of the present disclosure provides a control device for an air conditioner.
  • the control device uses the control method disclosed in the above embodiment to control the air conditioner.
  • the device specifically includes:
  • An acquisition unit 31 is used to determine that after the exhaust temperature of the compressor reaches the target exhaust temperature, continue to collect the new exhaust temperature of the compressor; the calculation unit 32 is used to determine, according to the preset control cycle, to collect data in the current control cycle The current exhaust temperature change rate corresponding to the new exhaust temperature; the correction unit 33 is configured to determine the current exhaust temperature change rate corresponding to the current exhaust temperature change rate according to the corresponding relationship between the exhaust temperature change rate and the target exhaust temperature correction value Correction value; the adjustment unit 34 is configured to correct the target exhaust gas temperature according to the current correction value, so as to reduce the difference between the corrected target exhaust gas temperature and the latest exhaust gas temperature collected in the current control cycle.
  • the difference between the actual exhaust temperature and the target exhaust temperature can be obtained by obtaining the exhaust temperature by the obtaining unit 31 and calculating the change rate of the exhaust temperature by the calculation unit 32;
  • the unit 33 determines the current correction value corresponding to the current exhaust temperature change rate, and the adjustment unit 34 adjusts the target exhaust temperature of the air conditioner to make the difference between the corrected target exhaust temperature and the latest exhaust temperature collected in the current control cycle. value decreases.
  • an embodiment of the present disclosure provides a control device for an air conditioner, including a processor (processor) 400 and a memory (memory) 401 .
  • the apparatus may further include a communication interface (Communication Interface) 402 and a bus 403 .
  • the processor 400, the communication interface 402, and the memory 401 can communicate with each other through the bus 403.
  • Communication interface 402 may be used for information transfer.
  • the processor 400 may invoke the logic instructions in the memory 401 to execute the control method for an air conditioner of the above-mentioned embodiment.
  • logic instructions in the memory 401 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.
  • the memory 401 can be used to store software programs and computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure.
  • the processor 400 executes the function application and data processing by running the program instructions/modules stored in the memory 401, that is, the control method for the air conditioner in the above-mentioned embodiment is implemented.
  • the memory 401 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.
  • the memory 401 may include high-speed random access memory, and may also include non-volatile memory.
  • An embodiment of the present disclosure provides an air conditioner, including the above-mentioned control device for an air conditioner.
  • Embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions, where the computer-executable instructions are configured to execute the above-mentioned control method for an air conditioner.
  • the embodiments of the present disclosure provide a computer program product, the computer program product includes a computer program stored on a computer-readable storage medium, and the computer program includes program instructions, when the program instructions are executed by a computer, the computer is made to execute the above-mentioned air conditioner. Control Method.
  • the above-mentioned computer-readable storage medium may be a transient computer-readable storage medium, and may also be a non-transitory computer-readable storage medium.
  • the technical solutions of the embodiments of the present disclosure may be embodied in the form of software products, and the computer software products are stored in a storage medium and include one or more instructions to enable a computer device (which may be a personal computer, a server, or a network equipment, etc.) to execute all or part of the steps of the methods of the embodiments of the present disclosure.
  • the aforementioned storage medium can be a non-transitory storage medium, including: U disk, removable hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc.
  • the term “and/or” as used in this application is meant to include any and all possible combinations of one or more of the associated listings.
  • the term “comprise” and its variations “comprises” and/or including and/or the like refer to stated features, integers, steps, operations, elements, and/or The presence of a component does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groupings of these.
  • an element qualified by the phrase “comprising a" does not preclude the presence of additional identical elements in the process, method, or device that includes the element.
  • each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other.
  • the methods, products, etc. disclosed in the embodiments if they correspond to the method section disclosed in the embodiments, reference may be made to the description of the method section for relevant parts.
  • the disclosed methods and products may be implemented in other ways.
  • the apparatus embodiments described above are only illustrative.
  • the division of units may only be a logical function division.
  • multiple units or components may be combined or may be Integration into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • Units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. This embodiment may be implemented by selecting some or all of the units according to actual needs.
  • each functional unit in the embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executables for implementing the specified logical function(s) instruction.
  • the functions noted in the blocks may occur out of the order noted in the figures. For example, two blocks 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.

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Abstract

La présente invention concerne le domaine technique des appareils intelligents et divulgue un procédé de commande pour un climatiseur. Le procédé comprend les étapes suivantes : après avoir déterminé que la température d'échappement d'un compresseur atteint une température d'échappement cible, la poursuite de la collecte d'une nouvelle température d'échappement du compresseur ; la détermination, selon une période de commande prédéfinie, d'un taux de variation de température d'échappement actuel correspondant à la nouvelle température d'échappement collectée dans une période de commande actuelle ; la détermination, en fonction d'une correspondance entre le taux de variation de température d'échappement et une valeur de correction de température d'échappement cible, d'une valeur de correction actuelle correspondant à la vitesse de changement de température d'échappement actuelle ; et la correction de la température d'échappement cible en fonction de la valeur de correction actuelle, de manière à réduire une différence entre la température d'échappement cible corrigée et la dernière température d'échappement collectée dans la période de commande actuelle. La température d'échappement cible peut être corrigée, de sorte qu'un système d'unité de climatisation fonctionne de manière stable. La présente invention concerne en outre un dispositif de commande pour le climatiseur et le climatiseur.
PCT/CN2021/133332 2021-04-16 2021-11-26 Procédé et dispositif de commande pour climatiseur et climatiseur WO2022217936A1 (fr)

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