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WO2019109959A1 - Dispositif de climatisation et procédé permettant de déterminer si l'état de fonctionnement dudit dispositif est normal - Google Patents

Dispositif de climatisation et procédé permettant de déterminer si l'état de fonctionnement dudit dispositif est normal Download PDF

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Publication number
WO2019109959A1
WO2019109959A1 PCT/CN2018/119399 CN2018119399W WO2019109959A1 WO 2019109959 A1 WO2019109959 A1 WO 2019109959A1 CN 2018119399 W CN2018119399 W CN 2018119399W WO 2019109959 A1 WO2019109959 A1 WO 2019109959A1
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WIPO (PCT)
Prior art keywords
temperature
air conditioner
air
difference
preset
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/CN2018/119399
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English (en)
Chinese (zh)
Inventor
肖克强
李伟
谢琳琳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Air Conditioner Gen Corp Ltd
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Qingdao Haier Air Conditioner Gen Corp 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.)
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Publication of WO2019109959A1 publication Critical patent/WO2019109959A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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

Definitions

  • the invention relates to a common electrical appliance, in particular to an air conditioning device and a method for determining whether the operating state of the air conditioning device is normal.
  • various abnormal phenomena may occur. For example, when the air-conditioning unit is operated for a long period of time, the refrigerant will gradually leak into the air. When the refrigerant is less than a certain degree, the cooling and heating effect of the entire air-conditioning unit will be straight. decline.
  • the above-mentioned several types of refrigerant quantity detection methods are based on many parameters or complicated acquisition methods, and it is impossible to accurately or accurately determine whether the refrigerant of the air conditioner is missing or insufficient, and even a judgment error may occur.
  • the above-mentioned partial refrigerant amount detecting method is only applicable to a fixed-frequency air conditioner, and the application range is narrow.
  • An object of the first aspect of the present invention is to overcome at least one of the deficiencies in the prior art, and to provide a method that has a wide range of applications and can easily and accurately determine whether the operating state of the air conditioning apparatus is normal.
  • Another object of the first aspect of the present invention is to simplify the internal structure of the air conditioning apparatus and reduce the cost.
  • Still another object of the first aspect of the present invention is to improve the accuracy of the judgment.
  • An object of the second aspect of the present invention is to provide an air conditioning apparatus.
  • the present invention provides a method for determining whether an air conditioner is operating normally, including:
  • the method further includes:
  • the operating frequency of the compressor is sequentially increased by adding one unit hertz each time;
  • the compressor After each lifting of the operating frequency of the compressor, the compressor is stably operated for a second preset period of time, and then the outlet air temperature and the air inlet temperature are acquired again, and the absolute difference between the two is calculated and judged. Whether the value is greater than or equal to the preset temperature difference threshold, and if so, determining that the operating state of the air conditioner is normal; if not, increasing the operating frequency of the compressor again;
  • the method further includes:
  • the abnormality information is transmitted to the display panel of the air conditioner to give a prompt information indicating that the air conditioner is faulty.
  • each of said unit hertz is 0.5 Hz, 1.0 Hz or 1.5 Hz;
  • N 2, 3, 4 or 5.
  • the first preset duration is any time length value ranging between 10 and 15 minutes;
  • the second preset duration is any length of time value ranging between 9 and 11 s.
  • the method further includes determining whether the compressor is allowed to be the highest under the current working condition.
  • the step of running the frequency run which includes:
  • the deviation is 10 times a difference between the set temperature and the indoor temperature
  • the deviation is 10 times the difference between the indoor temperature and the set temperature.
  • the preset temperature difference threshold is matched with a parameter of the air conditioner in a current working condition, where the parameter includes an operation mode, an outdoor temperature of an outdoor environment in which the air conditioner is located, and an indoor environment in which the air conditioner is located Indoor temperature.
  • the air conditioner when the air conditioner is operated in the heating mode, the average of the outdoor temperature and the indoor temperature is larger, and the preset temperature difference threshold is smaller;
  • an air conditioning apparatus comprising:
  • a temperature sensor assembly configured to controlably acquire an air inlet temperature and an air outlet temperature of the air conditioner after the compressor of the air conditioner is stably operated for a first preset period of time at a maximum operating frequency allowed under current operating conditions; as well as
  • a control device coupled to the temperature sensor assembly to calculate an absolute value of a difference between the air outlet temperature and the air inlet temperature obtained by the temperature sensor assembly, and at the air outlet temperature and the It is determined that the operating state of the air conditioner is normal when the absolute value of the difference in the air inlet temperature is greater than or equal to the preset temperature difference threshold.
  • the judging method of the present invention determines whether there is a lack or shortage of refrigerant in the air conditioner by using the absolute value of the difference between the air inlet temperature and the outlet temperature of the air conditioner, thereby determining whether the operation of the air conditioner is normal, and the outlet temperature can directly reflect the air conditioner.
  • the heating and cooling effect of the device, and the electric heating for defrosting or other components that affect the temperature of the airflow are not provided at the air outlet. Therefore, the absolute value of the difference between the temperature of the air inlet and the temperature of the air outlet can accurately and timely reflect the air conditioner.
  • the amount of refrigerant in the refrigeration system of the device improves the accuracy and timeliness of the judgment.
  • the air inlet temperature and the air outlet temperature are obtained in a very simple manner, and the temperature sensor can be directly disposed at the air inlet and the air outlet, which simplifies the internal structure of the air conditioner and reduces the cost.
  • the inventors of the present invention have creatively realized that when the operating frequency of the compressor is unstable, the temperature of the air outlet of the air conditioner is greatly affected by external influences, and it is difficult to judge the temperature of the air outlet in this state. standard.
  • the invention only obtains the air inlet temperature and the air outlet temperature after the compressor is stably operated for a period of time at the highest operating frequency allowed. At this time, the outlet temperature is stable, and the absolute value of the difference between the two can accurately reflect the air conditioner.
  • the amount of refrigerant in the refrigeration system of the device improves the accuracy of the judgment.
  • the inventors of the present invention have recognized that a certain margin is left in designing the maximum operating frequency of the compressor, that is, the actual operating frequency of the compressor can exceed the maximum operating frequency within the margin. Therefore, when the determination method of the present invention first determines that the absolute value of the difference between the tuyere temperature and the air inlet temperature is less than the preset temperature difference threshold, it does not immediately determine that the air conditioner is abnormal, but on the basis of the highest operating frequency. The operation frequency of the compressor is successively increased by adding one unit Hertz, and the operation state of the air conditioner is judged to be normal again in the same manner. This method not only avoids the sudden increase of the actual operating frequency of the compressor, but also avoids judgment errors.
  • FIG. 1 is a schematic flow chart of a method for determining whether an air conditioner operating state is normal according to an embodiment of the present invention
  • FIG. 2 is a schematic flow chart of a method for determining whether an air conditioner operating state is normal according to a further embodiment of the present invention
  • FIG. 3 is a schematic flow chart of a method for determining whether an air conditioner operating state is normal according to another further embodiment of the present invention.
  • Fig. 4 is a schematic structural view of an air conditioning apparatus according to an embodiment of the present invention.
  • the embodiment of the invention first provides a method for determining whether the operating state of the air conditioner is normal.
  • 1 is a schematic flow chart of a method for determining whether an air conditioner operating state is normal, according to an embodiment of the present invention. Referring to Figure 1, the above method of the present invention comprises:
  • Step S102 after the compressor of the air conditioner is stably operated for the first preset period of time at the highest operating frequency allowed under the current working condition, obtaining the air inlet temperature and the outlet temperature of the air conditioner;
  • Step S104 calculating an absolute value of a difference between the tuyere temperature and the air inlet temperature
  • Step S106 determining whether the absolute value of the difference between the tuyere temperature and the air inlet temperature is greater than or equal to the preset temperature difference threshold, and if yes, executing step S108, that is, when the absolute value of the difference between the outlet temperature and the inlet temperature is greater than or equal to
  • the temperature difference threshold is set, it is determined that the operating state of the air conditioner is normal. That is to say, at this time, the amount of refrigerant in the refrigeration system of the air conditioner is sufficient.
  • the judging method of the present invention determines whether there is a lack or shortage of refrigerant in the air conditioner by using the absolute value of the difference between the air inlet temperature and the outlet temperature of the air conditioner, thereby determining whether the operation of the air conditioner is normal, and the outlet temperature can directly reflect the air conditioner.
  • the heating and cooling effect of the device, and the electric heating for defrosting or other components that affect the temperature of the airflow are not provided at the air outlet. Therefore, the absolute value of the difference between the temperature of the air inlet and the temperature of the air outlet can accurately and timely reflect the air conditioner.
  • the amount of refrigerant in the refrigeration system of the device improves the accuracy and timeliness of the judgment.
  • the air inlet temperature and the air outlet temperature are obtained in a very simple manner, and the temperature sensor can be directly disposed at the air inlet and the air outlet, which simplifies the internal structure of the air conditioner and reduces the cost.
  • the inventors of the present invention have creatively realized that when the operating frequency of the compressor is unstable, the temperature of the air outlet of the air conditioner is greatly affected by external influences, and it is not easy to use the temperature of the air outlet in this state.
  • the invention only obtains the air inlet temperature and the air outlet temperature after the compressor is stably operated for a period of time at the highest operating frequency allowed. At this time, the outlet temperature is stable, and the absolute value of the difference between the two can accurately reflect the air conditioner.
  • the amount of refrigerant in the refrigeration system of the device improves the accuracy of the judgment.
  • the maximum operating frequency of the compressor varies under different operating conditions.
  • operating conditions means the indoor environment in which the air conditioning apparatus is located, the outdoor environment, and the operating mode of the air conditioning apparatus.
  • the first preset duration may be any length of time value ranging between 10 and 15 minutes.
  • the first preset duration may be 10 min, 11 min, 12 min, 13 min, 14 min or 15 min.
  • the selection of the first preset duration may depend on the specific type of air conditioning device.
  • the first preset duration may be 15 min.
  • the first preset duration may be 10 min.
  • the specific condition that the compressor is stably operated for the first preset duration under the current operating frequency can be: the first preset duration before the inverter air conditioner is started, and the inverter air conditioner has been set according to other states.
  • the maximum operating frequency runs for the first preset duration, and the fixed-frequency air conditioner operates stably for the first preset duration.
  • the preset temperature difference threshold is matched with a parameter of the air conditioner in a current operating condition, the parameter including an operation mode, an outdoor temperature of an outdoor environment in which the air conditioner is located, and an indoor environment in which the air conditioner is located Room temperature.
  • the air conditioner when the air conditioner operates in the heating mode, the average value of the outdoor temperature and the indoor temperature is larger, and the preset temperature difference threshold is smaller.
  • the air conditioner When the air conditioner is operated in the cooling mode, the average value of the outdoor temperature and the indoor temperature is larger.
  • the preset temperature difference threshold is larger.
  • the relationship between the preset temperature difference threshold and the outdoor temperature and the indoor temperature can be referred to the following table.
  • FIG. 2 is a schematic flow chart of a method for determining whether an air conditioner operating state is normal, in accordance with a further embodiment of the present invention.
  • the method of the present invention further includes:
  • step S202 when the absolute value of the difference between the outlet air temperature and the air inlet temperature is less than the preset temperature difference threshold, the operating frequency of the compressor is sequentially increased by adding one unit hertz each time. After each increase of the operating frequency of the compressor, the compressor is stably operated for a second preset duration, and then step S204 is performed: the outlet temperature and the inlet temperature are again acquired, and the absolute value of the difference between the two is calculated.
  • step S206 determining whether the absolute value of the difference between the tuyere temperature and the air inlet temperature is greater than or equal to the preset temperature difference threshold, and if yes, executing step S108, determining that the operating state of the air conditioner is normal, and if not, returning to step S202, Increase the operating frequency of the compressor again.
  • step S208 and step S210 after the number of times the operating frequency of the compressor is increased N times, if the absolute value of the difference between the outlet air temperature and the air inlet temperature is still less than the preset temperature difference threshold, it is determined that the operating state of the air conditioner is abnormal.
  • the inventors of the present invention have recognized that a certain margin is left in designing the maximum operating frequency of the compressor, that is, the actual operating frequency of the compressor can exceed the maximum operating frequency within the margin. Therefore, when the determination method of the present invention first determines that the absolute value of the difference between the tuyere temperature and the air inlet temperature is less than the preset temperature difference threshold, it does not immediately determine that the air conditioner is abnormal, but on the basis of the highest operating frequency. The operation frequency of the compressor is successively increased by adding one unit Hertz, and the operation state of the air conditioner is judged to be normal again in the same manner. This method not only avoids the sudden increase of the actual operating frequency of the compressor, but also avoids judgment errors.
  • each unit Hertz may be 0.5 Hz, 1.0 Hz, or 1.5 Hz.
  • the value of N can be 2, 3, 4 or 5.
  • the second preset duration may be any length of time value ranging between 9 and 11 s.
  • the second preset duration may be 9s, 10s or 11s.
  • the following is an example of a unit hertz of 1.0 Hz, N of 3, and a second preset duration of 10s.
  • the operating frequency of the compressor is increased by 1 Hz on the basis of the highest operating frequency, and after 10s of stable operation, the outlet temperature is again obtained. Air inlet temperature, and calculate and judge whether the absolute value of the difference between the two is greater than or equal to the preset temperature difference threshold. If yes, it determines that the air conditioner is operating normally. If not, then increase the operating frequency of the compressor by 1 Hz.
  • the outlet temperature and the inlet temperature After running for 10s, obtain the outlet temperature and the inlet temperature again, and calculate and judge whether the absolute value of the difference between the two is greater than or equal to the preset temperature difference threshold. If yes, determine that the air conditioner is operating normally. If not, then The operating frequency of the compressor is increased by 1 Hz. After 10 s of stable operation, the outlet temperature and the inlet temperature are again obtained, and the absolute value of the difference between the two is calculated and judged to be greater than or equal to the preset temperature difference threshold. If yes, the air conditioning device is determined. The operating state is normal, if not, it is determined that the operating state of the air conditioning device is abnormal, that is, the amount of refrigerant in the refrigeration system of the air conditioning device is insufficient. Or inadequate.
  • the method of the present invention further includes: step S212, transmitting the abnormality information to the display panel of the air conditioning device to give a prompt message that the air conditioning device is faulty. Therefore, it is convenient for the user to perform maintenance on the air conditioner.
  • FIG. 3 is a schematic flow chart of a method for determining whether an air conditioner operating state is normal, according to another further embodiment of the present invention.
  • the method when the air conditioner is an inverter air conditioner, before acquiring the air inlet temperature and the air outlet temperature of the air conditioner, the method further includes determining whether the compressor is allowed to operate at the highest operating frequency under the current working condition.
  • the steps to run, this step includes:
  • Step S302 obtaining an indoor temperature of an indoor environment in which the air conditioner is located;
  • Step S304 calculating a deviation between the indoor temperature and the set temperature of the air conditioner under the current working condition
  • the method of the present invention further includes: performing PID control on the air conditioner when the operating frequency of the compressor is continuously detected to be less than a set frequency lower than the highest operating frequency for a third predetermined period of time.
  • the deviation is 10 times the difference between the set temperature and the indoor temperature; and when the air conditioner operates in the cooling mode, the deviation is the indoor temperature and the set temperature 10 times the difference.
  • the preset deviation threshold may be any temperature value ranging between 0.5 and 0.7 °C.
  • the preset deviation threshold can be 0.5 ° C, 0.6 ° C or 0.7 ° C.
  • the invention also provides an air conditioning device.
  • Fig. 4 is a schematic structural view of an air conditioning apparatus according to an embodiment of the present invention.
  • the air conditioning apparatus 1 of the present invention includes a temperature sensor assembly 10 and a control device 20.
  • the temperature sensor assembly 10 is configured to controllably acquire the air inlet temperature and the air outlet temperature of the air conditioning device after the compressor of the air conditioning device is stably operated for the first predetermined period of time at the highest operating frequency allowed under the current operating conditions.
  • the control device 20 is connected to the temperature sensor assembly 10 to calculate the absolute value of the difference between the air outlet temperature and the air inlet temperature obtained by the temperature sensor assembly 10, and the absolute value of the difference between the air outlet temperature and the air inlet temperature is greater than When it is equal to the preset temperature difference threshold, it is determined that the operating state of the air conditioner is normal.
  • the temperature sensor assembly 10 may include an air inlet temperature sensor disposed at an air inlet of the air conditioner 1 for acquiring an air inlet temperature, and an air outlet temperature sensor disposed at an air outlet of the air conditioner 1 for acquiring a tuyere temperature.

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

Abstract

L'invention concerne un dispositif de climatisation et un procédé permettant de déterminer si l'état de fonctionnement dudit dispositif est normal. Le procédé selon l'invention consiste : après qu'un compresseur d'un dispositif de climatisation a fonctionné de façon stable pendant une première période de temps prédéfinie à la fréquence de fonctionnement maximale autorisée pour une condition de fonctionnement courante, à obtenir une température d'entrée d'air et une température de sortie d'air du dispositif de climatisation ; à calculer la valeur absolue d'une différence entre la température de sortie d'air et la température d'entrée d'air ; et à déterminer que l'état de fonctionnement du dispositif de climatisation est normal si la valeur absolue de la différence entre la température de sortie d'air et la température d'entrée d'air est supérieure ou égale à un seuil de différence de température prédéfini. Lorsque le compresseur fonctionne de façon stable à la fréquence de fonctionnement maximale, la température de sortie d'air reflète directement un effet de chauffage ou de refroidissement du dispositif de climatisation. Ainsi, la valeur absolue de la différence entre la température d'entrée d'air et la température de sortie d'air reflète précisément la quantité de fluide frigorigène dans un système de refroidissement du dispositif de climatisation, en temps opportun, ce qui améliore la précision et la rapidité de détermination. La température d'entrée d'air et la température de sortie d'air sont obtenues facilement, ce qui simplifie la structure interne du dispositif de climatisation et réduit les coûts.
PCT/CN2018/119399 2017-12-07 2018-12-05 Dispositif de climatisation et procédé permettant de déterminer si l'état de fonctionnement dudit dispositif est normal Ceased WO2019109959A1 (fr)

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CN201711288136.7 2017-12-07
CN201711288136.7A CN108168044A (zh) 2017-12-07 2017-12-07 空调装置及用于判断其运行状态是否正常的方法

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CN108168044A (zh) * 2017-12-07 2018-06-15 青岛海尔空调器有限总公司 空调装置及用于判断其运行状态是否正常的方法
CN109000336B (zh) * 2018-07-25 2019-09-17 珠海格力电器股份有限公司 温度调节设备异常工作检测方法、装置、存储介质和系统
CN109556244A (zh) * 2018-10-17 2019-04-02 青岛海尔空调电子有限公司 空调系统及其出风温度控制方法
CN110145889B (zh) * 2019-06-12 2023-10-10 珠海格力电器股份有限公司 空调器系统、空调器及空调器系统控制的方法
CN110567085B (zh) * 2019-08-01 2020-10-23 珠海格力电器股份有限公司 空调的监控方法、装置和空调
CN110779158A (zh) * 2019-09-30 2020-02-11 珠海格力电器股份有限公司 一种基于空调遥控器的控制方法、计算机可读存储介质及空调
CN113418272B (zh) * 2021-05-19 2023-06-16 青岛海尔空调电子有限公司 用于调湿机故障检测的方法及装置、调湿机
CN114216240A (zh) * 2021-11-17 2022-03-22 青岛海尔空调器有限总公司 制冷剂回收控制方法、空调、电子设备和存储介质
CN115167580A (zh) * 2022-07-01 2022-10-11 广州润和颐能软件技术有限公司 一种变电站空调智能监测控制系统
CN115879923B (zh) * 2022-11-22 2025-03-18 杭州青橄榄物联科技有限公司 一种考虑空调能耗的租赁空调价格评估方法与系统
CN117146384B (zh) * 2023-10-30 2024-01-30 深圳市宇隆伟业科技有限公司 基于数据驱动的空调运行状态监测方法

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