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WO2018058732A1 - Procédé de commande et de protection de fuite de fluide frigorigène, dispositif de commande et climatiseur - Google Patents

Procédé de commande et de protection de fuite de fluide frigorigène, dispositif de commande et climatiseur Download PDF

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Publication number
WO2018058732A1
WO2018058732A1 PCT/CN2016/104163 CN2016104163W WO2018058732A1 WO 2018058732 A1 WO2018058732 A1 WO 2018058732A1 CN 2016104163 W CN2016104163 W CN 2016104163W WO 2018058732 A1 WO2018058732 A1 WO 2018058732A1
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WO
WIPO (PCT)
Prior art keywords
maximum frequency
current operating
operating condition
exhaust temperature
air conditioner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/104163
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English (en)
Chinese (zh)
Inventor
陈华伟
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.)
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Midea Group Co Ltd, GD Midea Air Conditioning Equipment Co Ltd filed Critical Midea Group Co Ltd
Publication of WO2018058732A1 publication Critical patent/WO2018058732A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties

Definitions

  • the embodiment of the invention relates to the technical field of air conditioners, and particularly relates to a refrigerant leakage protection control method, a controller and an air conditioner.
  • inverter air conditioners have already forecasted the leakage of refrigerants, but they only stay in the forecasting stage, and can only inform users that the air conditioners they are using have a refrigerant leakage failure. Once this fault is reported, basically the refrigerant leaks out. The air conditioner has also been severely damaged.
  • the present invention provides a refrigerant leakage protection control method, a controller, and an air conditioner.
  • the refrigerant leakage protection control method provided by the present invention can provide air conditioning without delaying air conditioning operation when refrigerant leakage occurs. protection.
  • the present invention provides the following technical solutions:
  • the present invention provides a refrigerant leakage protection control method, including:
  • the maximum frequency under the current operating condition is adjusted according to a preset control strategy to reduce the current The maximum frequency under operating conditions.
  • the method further includes:
  • the maximum frequency after the last adjustment is continued according to the The preset control strategy is adjusted.
  • the compressor is controlled to continue to operate according to the most recently adjusted maximum frequency.
  • the preset control strategy includes:
  • FMAX(n-1) is the maximum frequency corresponding to the current operating condition
  • FMAX(n) is the maximum frequency after the first adjustment
  • ⁇ is the exhaust of the first detected compressor.
  • FMAX(n-1) is the adjusted maximum frequency closest to this adjustment
  • FMAX(n) is the adjusted maximum frequency
  • the value of k ranges from 1.5 ⁇ k ⁇ 3.
  • the method further includes:
  • the control compressor is operated according to the preset minimum frequency.
  • the method further includes:
  • the air conditioner is controlled to issue a fault report.
  • the method further includes:
  • the maximum frequency corresponding to the changed working condition and the target exhaust temperature are obtained, and the target exhaust temperature under the condition that the compressor exhaust temperature is greater than the changed condition is detected.
  • the maximum frequency under the changed operating conditions is adjusted according to the preset control strategy.
  • the present invention also provides a controller, including:
  • Obtaining a module configured to acquire a current operating condition of the air conditioner, and obtain a maximum frequency corresponding to the current operating condition and a target exhaust temperature according to the current operating condition;
  • the control module is configured to adjust the maximum frequency of the current operating condition according to a preset control strategy when detecting that the exhaust temperature of the compressor is greater than the target exhaust temperature under the current operating condition, so as to reduce the current operating condition.
  • the maximum frequency below.
  • the invention also provides an air conditioner comprising a controller as described above.
  • the refrigerant leakage protection control method comprehensively judges the refrigerant leakage of the air conditioner system by collecting the exhaust gas temperature, and detecting that the exhaust gas temperature of the compressor is greater than the current operating condition.
  • the target exhaust temperature that is, when there is refrigerant leakage in the air conditioner
  • the maximum frequency under the current operating condition is adjusted according to a preset control strategy to reduce the maximum frequency under the current operating condition, thereby realizing the air conditioner. Protection to improve the life of the air conditioner.
  • the refrigerant leakage protection control method provided by the present invention comprehensively judges the amount of refrigerant leakage of the air conditioner system by collecting the exhaust gas temperature, thereby adjusting the frequency control logic of the air conditioner to achieve the purpose of protecting the normal operation of the air conditioner. That is, the present invention can provide protection to the air conditioner while not causing the air conditioner to work when the refrigerant leaks.
  • FIG. 1 is a flow chart of a refrigerant leakage protection control method according to a first embodiment of the present invention
  • FIG. 2 is a schematic view showing the working principle of an air conditioner refrigeration system
  • FIG. 3 is a flow chart of a refrigerant leakage protection control method according to a third embodiment of the present invention Figure
  • FIG. 4 is a schematic structural diagram of a controller according to a fourth embodiment of the present invention.
  • the present invention provides a refrigerant leakage protection control method, a controller, and an air conditioner.
  • the refrigerant leakage protection control method provided by the present invention can provide air conditioning without delaying air conditioning operation when refrigerant leakage occurs. protection.
  • the present invention will be explained in detail below through the first to fifth embodiments.
  • FIG. 1 is a flowchart of a refrigerant leakage protection control method according to a first embodiment of the present invention.
  • a refrigerant leakage protection control method according to a first embodiment of the present invention includes the following steps:
  • Step 101 Acquire a current operating condition of the air conditioner, and obtain a maximum frequency corresponding to the current operating condition and a target exhaust temperature according to the current operating condition.
  • the air conditioner since the air conditioner has different maximum frequencies corresponding to the target exhaust temperature under different working conditions, it is necessary to obtain the current operating condition of the air conditioner before performing the control, and according to the current operation.
  • the working condition acquires the maximum frequency corresponding to the current operating condition and the target exhaust temperature. For example, assuming that the current operating condition is the first operating condition in Table 1 below, the maximum frequency a1 corresponding to the current operating condition and the target exhaust temperature ⁇ 1 are obtained.
  • Table 1 corresponding maximum frequency and target exhaust temperature under different operating conditions in cooling mode
  • Step 102 If it is detected that the exhaust temperature of the compressor is greater than the target exhaust temperature under the current operating condition and continues for the first preset time period, the maximum frequency under the current operating condition is adjusted according to a preset control strategy. To reduce the maximum frequency under current operating conditions.
  • FIG. 1 denotes a compressor
  • 2 denotes a four-way valve
  • 3 denotes an outdoor unit heat exchanger
  • 4 denotes a throttle capillary
  • 5 denotes an indoor heat exchanger
  • 6 denotes an exhaust temperature sensor.
  • the air conditioner In a normal cooling or heating cycle, the air conditioner has a normal range of exhaust temperatures, and its exhaust temperature is detected by the exhaust temperature sensor 6. However, when the refrigeration system is partially leaked, the exhaust temperature will be higher than the normal exhaust temperature. Therefore, if it is detected that the exhaust temperature of the compressor is greater than the target exhaust temperature under the current operating conditions, it may indicate that the refrigerant leaks in the refrigeration system.
  • the refrigerant leakage occurs in the air conditioner refrigeration system, and the present invention prevents the refrigerant from being cooled.
  • the leakage condition is further deteriorated.
  • the preset control strategy is used to adjust the maximum frequency under the current operating conditions to reduce the maximum frequency under the current operating conditions, thereby realizing the protection of the air conditioner.
  • the value of the first preset time period is generally 3 to 7 minutes.
  • the value of the first preset time period may be 0, that is, when detecting that the exhaust temperature of the compressor is greater than the target exhaust temperature under the current operating condition, the current control strategy is used according to the preset control strategy.
  • the maximum frequency under operating conditions is adjusted to reduce the maximum frequency under current operating conditions.
  • the air conditioner is controlled to operate according to the maximum frequency corresponding to the current working condition.
  • the refrigerant leakage protection control method comprehensively judges the refrigerant leakage of the air conditioner system by collecting the exhaust gas temperature, and detects that the exhaust gas temperature of the compressor is greater than the current operating condition.
  • the target exhaust temperature that is, when there is refrigerant leakage in the air conditioner
  • the maximum frequency under the current operating condition is adjusted according to a preset control strategy to reduce the maximum frequency under the current operating condition, thereby realizing the air conditioner. Protection to improve the life of the air conditioner.
  • the refrigerant leakage protection control method provided by the embodiment of the present invention comprehensively judges the amount of refrigerant leakage of the air conditioner system by collecting the exhaust gas temperature, thereby adjusting the frequency control logic of the air conditioner to achieve normal operation of the air conditioner.
  • the object, that is, the embodiment of the present invention can provide protection to the air conditioner while not causing the air conditioner to work when the refrigerant leaks.
  • the preset control policy includes:
  • FMAX(n-1) is the maximum frequency corresponding to the current operating condition
  • FMAX(n) is the maximum frequency after the first adjustment
  • ⁇ is the exhaust of the first detected compressor.
  • FMAX(n-1) is the adjusted maximum frequency closest to this adjustment
  • FMAX(n) is the adjusted maximum frequency
  • the preset control strategy provided in this embodiment can implement stepwise protection control on the air conditioner.
  • the exhaust gas temperature tp generally refers to the exhaust gas temperature at the end of the first predetermined time period (eg, 5 minutes).
  • the air conditioner detects a certain moment
  • the actual exhaust temperature tp 103 degrees
  • the exhaust temperature tp 108 degrees after 5 minutes.
  • tp generally takes the exhaust temperature after 5 minutes, that is, 108 degrees.
  • the adjustment range is not too large each time. Therefore, preferably, the range of k is 1.5 ⁇ k ⁇ 3.
  • the preset control strategy described in the present invention is not limited thereto, and any control strategy capable of adjusting the maximum frequency of the air conditioner according to the current exhaust temperature of the compressor to achieve protection of the air conditioner should be It falls within the scope of protection of the present invention.
  • H is a fixed value.
  • each time it is adjusted it is a multiple of the last adjustment amount H.
  • the refrigerant leakage protection control method provided by the above embodiment is further supplemented.
  • the method further includes the following steps:
  • Step 103 If the exhaust gas temperature of the current compressor is greater than the target exhaust gas temperature under the current working condition for each of the second preset time periods, and the first preset time period is continued, the latest adjusted maximum frequency is obtained. Continue to adjust according to the preset control strategy.
  • the second preset time period is not excessively long. Therefore, preferably, the second preset time period is 20 to 40 minutes.
  • the maximum frequency of the air conditioner is adjusted once, it is not left unattended, but the adaptability is continuously adjusted according to the specific situation at any time. If after a period of 30 minutes after the first adjustment, it is judged that the exhaust temperature of the current compressor is still greater than the target exhaust temperature under the current working conditions, the refrigerant leakage still exists, and the maximum frequency should be adjusted at this time. In order to improve the leakage of refrigerant, and at the same time achieve automatic protection of air conditioners.
  • the compressor can be controlled to continue according to the latest adjusted maximum frequency. run.
  • the refrigerant leakage protection control method provided by the above embodiment is explained by a specific example.
  • the refrigerant leakage protection control method provided by the above embodiment further includes: if it is determined that the adjusted maximum frequency is less than a preset minimum frequency of the air conditioner, controlling the compressor according to the preset minimum Frequency operation. In addition, if it is determined that the compressor continues to operate continuously for a third predetermined period of time according to the preset minimum frequency, the air conditioner is controlled to issue a fault report.
  • the third predetermined period of time should not be too long, generally 3 to 5 hours.
  • the refrigerant leakage protection control method provided by the above embodiment further includes:
  • the maximum frequency corresponding to the changed working condition and the target exhaust temperature are obtained, and the target exhaust temperature under the condition that the compressor exhaust temperature is greater than the changed condition is detected.
  • the maximum frequency under the changed operating conditions is adjusted according to the preset control strategy.
  • the air conditioner when the air conditioner performs a refrigerant control down frequency, the maximum frequency of the air conditioner at this time
  • the air conditioner when the power is re-powered, the air conditioner is re-run, and it is necessary to re-determine the execution. That is, if the exhaust temperature of the air conditioner is lower than the target maximum exhaust temperature, the air conditioner performs the operation according to the original maximum frequency; if the air conditioner is re-operated, the exhaust temperature of the air conditioner is still higher than the target maximum exhaust temperature. Then, the air conditioner re-executes the refrigerant leakage step control logic according to the preset control strategy described above.
  • a fourth embodiment of the present invention provides a controller.
  • the controller includes: an acquisition module 41 and a control module 42, wherein:
  • the obtaining module 41 is configured to obtain a current operating condition of the air conditioner, and obtain a maximum frequency corresponding to the current operating condition and a target exhaust temperature according to the current operating condition;
  • the control module 42 is configured to adjust the maximum frequency under the current operating condition according to a preset control strategy when detecting that the exhaust gas temperature of the compressor is greater than the target exhaust temperature under the current operating condition, so as to reduce the current operation The maximum frequency.
  • the preset control policy includes:
  • FMAX(n-1) is the maximum frequency corresponding to the current operating condition
  • FMAX(n) is the maximum frequency after the first adjustment
  • ⁇ is the exhaust of the first detected compressor.
  • FMAX(n-1) is the adjusted maximum frequency closest to this adjustment
  • FMAX(n) is the adjusted maximum frequency
  • the exhaust gas temperature tp generally refers to the exhaust gas temperature at the end of the first predetermined time period (eg, 5 minutes).
  • the air conditioner detects a certain moment
  • the actual exhaust temperature tp 103 degrees
  • the exhaust temperature tp 108 degrees after 5 minutes.
  • tp generally takes the exhaust temperature after 5 minutes, that is, 108 degrees.
  • the adjustment range is not too large each time. Therefore, preferably, the range of k is 1.5 ⁇ k ⁇ 3.
  • the preset control strategy described in the present invention is not limited thereto, and any control strategy capable of adjusting the maximum frequency of the air conditioner according to the current exhaust temperature of the compressor to achieve protection of the air conditioner should be It falls within the scope of protection of the present invention.
  • H is a fixed value.
  • each time it is adjusted it is a multiple of the last adjustment amount H.
  • control module 42 is further configured to: for each second predetermined period of time, if it is determined that the current exhaust temperature of the compressor is greater than the target exhaust temperature under the current operating condition and continue for the first pre- If the time period is set, the maximum adjusted frequency is continuously adjusted according to the preset control strategy.
  • the second preset time period is not excessively long. Therefore, preferably, the second preset time period is 20 to 40 minutes.
  • the embodiment of the present invention does not leave a problem, but is continuously adjusted according to specific conditions at any time. If after a period of 30 minutes after the first adjustment, it is judged that the exhaust temperature of the current compressor is still greater than the target exhaust temperature under the current working conditions, the refrigerant leakage still exists, and the maximum frequency should be adjusted at this time. In order to improve the leakage of refrigerant, and at the same time achieve automatic protection of air conditioners.
  • the compressor can be controlled to continue according to the latest adjusted maximum frequency. run.
  • control module 42 is further configured to:
  • the control compressor is operated according to the preset minimum frequency.
  • control module 42 is further configured to:
  • the air conditioner is controlled to issue a fault report.
  • the third predetermined period of time should not be too long, generally 3 to 5 hours.
  • control module 42 is further configured to:
  • the acquisition module 41 is controlled to acquire the maximum frequency corresponding to the changed working condition and the target exhaust temperature, and detects that the exhaust temperature of the compressor is greater than the changed operating condition.
  • the maximum frequency under the changed operating conditions is adjusted according to a preset control strategy.
  • the controller described in this embodiment may be used to perform the control method described in the foregoing embodiments, and the principles and technical effects thereof are similar, and thus are not described herein again.
  • a fifth embodiment of the present invention provides an air conditioner including the controller as described in the above embodiments. Since the air conditioner includes the above-described controller, the same technical problem can be solved and the same technical effects can be obtained.
  • the terms “mounted,” “connected,” and “connected” are used in a broad sense, and may be, for example, a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, It can also be an electrical connection; it can be directly connected, or it can be connected indirectly through an intermediate medium, which can be the internal connection of two components.
  • the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • the refrigerant leakage protection control method comprehensively judges the refrigerant leakage of the air conditioner system by collecting the exhaust gas temperature, and when detecting that the exhaust gas temperature of the compressor is greater than the target exhaust temperature under the current operating condition , that is, when there is refrigerant leakage in the air conditioner, the maximum frequency under the current operating conditions is adjusted according to a preset control strategy to reduce the maximum frequency under the current operating conditions, thereby realizing the protection of the air conditioner to improve the air conditioner.
  • the service life
  • the refrigerant leakage protection control method provided by the present invention comprehensively judges the amount of refrigerant leakage of the air conditioner system by collecting the exhaust gas temperature, thereby adjusting the frequency control logic of the air conditioner to achieve the purpose of protecting the normal operation of the air conditioner. That is, the present invention can provide protection to the air conditioner while not causing the air conditioner to work in the event of refrigerant leakage, and has industrial applicability.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

L'invention concerne un procédé de commande et de protection de fuite de fluide frigorigène, comprenant les étapes consistant à : acquérir un état de fonctionnement actuel d'un climatiseur et acquérir, sur la base de l'état de fonctionnement actuel, la fréquence maximale et une température de gaz d'échappement cible correspondant à l'état de fonctionnement actuel (101); si la température de gaz d'échappement d'un compresseur est détectée pour être supérieure à la température d'échappement de gaz cible dans l'état de fonctionnement actuel et a continué telle quelle pendant une première durée prédéfinie, régler alors la fréquence maximale dans l'état de fonctionnement actuel en fonction d'une politique de commande prédéfinie, ce qui permet de réduire la fréquence maximale dans l'état de fonctionnement actuel (102). L'invention concerne également un dispositif de commande et le climatiseur à utiliser dans le procédé de commande et de protection de fuite de fluide frigorigène.
PCT/CN2016/104163 2016-09-29 2016-10-31 Procédé de commande et de protection de fuite de fluide frigorigène, dispositif de commande et climatiseur Ceased WO2018058732A1 (fr)

Applications Claiming Priority (2)

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CN201610865386.1 2016-09-29
CN201610865386.1A CN106152428B (zh) 2016-09-29 2016-09-29 冷媒泄露保护控制方法、控制器及空调

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CN113639401A (zh) * 2021-07-08 2021-11-12 青岛海尔空调电子有限公司 空调器的冷媒泄漏检测控制方法
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CN114777284A (zh) * 2022-04-15 2022-07-22 珠海格力电器股份有限公司 一种空调的缺冷媒保护方法、装置、存储介质及空调
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CN111766815A (zh) * 2020-07-14 2020-10-13 上海威派格智慧水务股份有限公司 一种水务设备的运行监控系统
CN113639401A (zh) * 2021-07-08 2021-11-12 青岛海尔空调电子有限公司 空调器的冷媒泄漏检测控制方法
CN113847705A (zh) * 2021-09-30 2021-12-28 广东美的制冷设备有限公司 空调器及其快检方法与装置、存储介质
CN114777284A (zh) * 2022-04-15 2022-07-22 珠海格力电器股份有限公司 一种空调的缺冷媒保护方法、装置、存储介质及空调
CN115077032A (zh) * 2022-05-24 2022-09-20 青岛海尔空调器有限总公司 压缩机母线电压控制方法、装置及空调器
CN119468404A (zh) * 2024-12-03 2025-02-18 舜虹环境技术(苏州)有限公司 一种预防空调制冷剂泄漏检测的控制方法

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