WO2021073098A1 - 一种定频空调器缺冷媒保护方法 - Google Patents

一种定频空调器缺冷媒保护方法 Download PDF

Info

Publication number
WO2021073098A1
WO2021073098A1 PCT/CN2020/092072 CN2020092072W WO2021073098A1 WO 2021073098 A1 WO2021073098 A1 WO 2021073098A1 CN 2020092072 W CN2020092072 W CN 2020092072W WO 2021073098 A1 WO2021073098 A1 WO 2021073098A1
Authority
WO
WIPO (PCT)
Prior art keywords
compressor
air conditioner
refrigerant
operating time
heat exchanger
Prior art date
Application number
PCT/CN2020/092072
Other languages
English (en)
French (fr)
Inventor
谭秋晖
杨亚华
徐来福
任奎
Original Assignee
南京天加环境科技有限公司
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 南京天加环境科技有限公司 filed Critical 南京天加环境科技有限公司
Publication of WO2021073098A1 publication Critical patent/WO2021073098A1/zh

Links

Images

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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/38—Failure diagnosis
    • 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
    • F24F11/52—Indication arrangements, e.g. displays
    • 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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

Definitions

  • the invention relates to an air conditioner control method, in particular to a fixed frequency air conditioner control method, in particular to a fixed frequency air conditioner lack of refrigerant protection method.
  • the fixed-frequency air conditioner is a split device, it needs to be connected to the pipeline.
  • the unit’s own refrigerant is used for emptying, resulting in a decrease in the amount of refrigerant in the system, and also due to unqualified installation technology, resulting in pipeline connection There is a leakage at the place, resulting in a decrease in the amount of refrigerant in the system.
  • the purpose of the present invention is to address the shortcomings of the prior art and provide a method for protecting the fixed frequency air conditioner from lack of refrigerant, which can protect the compressor in time when the refrigerant leaks to a certain extent, thereby prolonging the service life of the compressor and improving the air conditioner.
  • the economy and reliability is to address the shortcomings of the prior art and provide a method for protecting the fixed frequency air conditioner from lack of refrigerant, which can protect the compressor in time when the refrigerant leaks to a certain extent, thereby prolonging the service life of the compressor and improving the air conditioner.
  • a method for protecting a fixed-frequency air conditioner from lack of refrigerant comprising a refrigerant circulation loop composed of a compressor, a four-way valve, an outdoor heat exchanger, a throttling component, an indoor heat exchanger, and a gas-liquid separator.
  • a coil temperature sensor is provided on the middle plate; an ambient temperature sensor is provided beside the indoor heat exchanger; the protection method includes the following steps:
  • the central temperature Ti of the indoor heat exchanger is detected by the coil temperature sensor;
  • the return air temperature Th of the indoor unit is detected by the ambient temperature sensor;
  • the air-conditioning controller records the cumulative operating time t of the compressor;
  • step 8 If Th-Ti ⁇ T2 and duration ⁇ t4, go to step 8); otherwise, go to step 2); where: T2 is the second temperature preset threshold; t4 is the fourth compressor cumulative operating time preset valve value;
  • step 5 If t ⁇ t5, go to step 5); otherwise, go to step 2); where: t5 is the preset threshold value of the fifth compressor cumulative operating time;
  • step 7 If 0 ⁇ tmin-tmax ⁇ t3, go to step 7); otherwise, go to step 2); where: tmax is the cumulative operating time of the compressor when the maximum temperature difference between Th and Ti occurs; tmin is the minimum temperature difference between Th and Ti The cumulative operating time of the compressor at the time of occurrence; t3 is the preset threshold of the cumulative operating time of the third compressor;
  • step 8 If tmax ⁇ t1, and tmin ⁇ t2, go to step 8); otherwise, go to step 2); where: t1 is the preset threshold value of the cumulative operating time of the first compressor; t2 is the preset threshold of the cumulative operating time of the second compressor Set a threshold;
  • the air conditioner controller displays a fault, the code is the lack of refrigerant protection; at the same time, the compressor shuts down.
  • the invention has reasonable design, clear logic and convenient control. It can judge the leakage degree of the air conditioner refrigerant by detecting the compressor operating time, indoor heat exchanger coil temperature and indoor ambient temperature and other parameters, so as to protect the compressor in time. The service life of the compressor can be prolonged, and the economy and reliability of the air conditioner can be improved.
  • Figure 1 is a schematic diagram of the system structure of the present invention.
  • 1-compressor 2-four-way valve; 3-outdoor heat exchanger; 4-throttling component; 5-stop valve; 6-indoor heat exchanger; 7-gas-liquid separator; 8-coil temperature Sensor; 9-ambient temperature sensor.
  • a fixed-frequency air conditioner includes a refrigerant circulation loop composed of a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a throttling component 4, an indoor heat exchanger 6 and a gas-liquid separator 7 , Specifically: the discharge port and suction port of the compressor 1 are respectively connected to the four-way valve 2 and the gas-liquid separator 7; the other three ports of the four-way valve 2 are respectively connected to the outdoor heat exchanger 3 and the indoor heat exchanger 6 And the gas-liquid separator 7; the outdoor heat exchanger 3 and the indoor heat exchanger 6 are shown in series, with a throttling component 4 in between; the two ends of the indoor heat exchanger 6 are also provided with a shut-off valve 5.
  • a coil temperature sensor 9 is provided on the middle plate of the indoor heat exchanger 6, which can detect the middle temperature of the indoor heat exchanger; an ambient temperature sensor 10 is provided next to the indoor heat exchanger 6, which can detect The return air temperature of the indoor unit.
  • the compressor is a fixed frequency compressor.
  • the invention provides a method for protecting a fixed-frequency air conditioner from lack of refrigerant, including the following steps:
  • the central temperature Ti of the indoor heat exchanger is detected by the coil temperature sensor;
  • the return air temperature Th of the indoor unit is detected by the ambient temperature sensor;
  • the air-conditioning controller records the cumulative operating time t of the compressor;
  • step 8 If Th-Ti ⁇ T2 and duration ⁇ t4, go to step 8); otherwise, go to step 2); where: T2 is the second temperature preset threshold; t4 is the fourth compressor cumulative operating time preset valve value;
  • step 5 If t ⁇ t5, go to step 5); otherwise, go to step 2); where: t5 is the preset threshold value of the fifth compressor cumulative operating time;
  • step 7 If 0 ⁇ tmin-tmax ⁇ t3, go to step 7); otherwise, go to step 2); where: tmax is the cumulative operating time of the compressor when the maximum temperature difference between Th and Ti occurs; tmin is the minimum temperature difference between Th and Ti The cumulative operating time of the compressor at the time of occurrence; t3 is the preset threshold of the cumulative operating time of the third compressor;
  • step 8 If tmax ⁇ t1, and tmin ⁇ t2, go to step 8); otherwise, go to step 2); where: t1 is the preset threshold value of the cumulative operating time of the first compressor; t2 is the preset threshold of the cumulative operating time of the second compressor Set threshold; t1 ⁇ t2;
  • the air conditioner controller displays a fault, the code is the lack of refrigerant protection; at the same time, the compressor shuts down.
  • control principle of the present invention is:

Abstract

本发明涉及一种定频空调器缺冷媒保护方法，包括以下步骤： 1)空调器制冷运行，压缩机启动； 2)检测室内换热器中部温度Ti；检测室内机回风温度Th；空调控制器记录压缩机累计运行时间t； 3)若Th-Ti≤T2，持续时间≥t4，转步骤8)；否则，转步骤2)； 4)若t≤t5，转步骤5)；否则，转步骤2)； 5)若(Th-Ti)max-(Th-Ti)min≥T1，转步骤6)；否则，转步骤2)； 6)若0＜tmin-tmax≤t3，转步骤7)；否则，转步骤2)； 7)若tmax≥t1，且tmin≤t2，转步骤8)；否则，转步骤2)； 8)空调控制器显示故障，代码为缺冷媒保护；同时，压缩机关机。本发明通过检测压缩机运行时间，以及室内换热器盘管温度和室内环境温度等参数，判断出空调器冷媒的泄露程度，保护压缩机。

Description

一种定频空调器缺冷媒保护方法 技术领域
本发明涉及一种空调控制方法，尤其是一种定频空调的控制方法，具体的说是一种定频空调器缺冷媒保护方法。
背景技术
因为定频空调器为分体式的设备，需要进行管路的连接，安装过程中会因采用机组自带冷媒进行排空，导致系统冷媒量减少，也会因安装技术不合格，导致管路连接处产生泄露，导致系统冷媒量减少。
现有的定频空调器因为成本考虑，没有低压压力开关、排气温度传感器等常用检测冷媒循环是否正常的设备，当空调冷媒量减少到一定程度时，压缩机润滑油在高温下失去润滑效果，甚至碳化，导致压缩机气缸部件磨损直至卡缸。虽然压缩机内部设置有内置保护器，通过检测温度和电流，在高温或者大电流下会触发保护。但是，由于机械部件的恢复时间较长，影响了用户的使用效果。因此，需要对现有技术加以改进，以便提高压缩机使用寿命，改善用户的使用感受。
发明内容
本发明的目的是针对现有技术的不足，提供一种定频空调器缺冷媒保护方法，可在冷媒泄露到一定程度时，及时保护压缩机，从而，延长压缩机的使用寿命，提升空调器的经济性和可靠性。
本发明的技术方案是：
一种定频空调器缺冷媒保护方法，包括由压缩机、四通阀、室外换热器、节流部件、室内换热器和气液分离器构成的冷媒循环回路，所述室内换热器的中盘上设有盘管温度传感器；所述室内换热器的旁边设有环境温度传感器；所述保护方法包括以下步骤：
1)空调器制冷运行，压缩机启动；
2)通过盘管温度传感器检测室内换热器中部温度Ti；通过环境温度传感器检测室内机回风温度Th；空调控制器记录压缩机累计运行时间t；
3)若Th-Ti≤T2，持续时间≥t4，转步骤8)；否则，转步骤2)；其中：T2为第二温度预设阀值；t4为第四压缩机累计运行时间预设阀值；
4)若t≤t5，转步骤5)；否则，转步骤2)；其中：t5为第五压缩机累计运行时间预设阀值；
5)若(Th-Ti)max-(Th-Ti)min≥T1，转步骤6)；否则，转步骤2)；其中：T1为第一温度预设阀值；
6)若0＜tmin-tmax≤t3，转步骤7)；否则，转步骤2)；其中：tmax为Th与Ti温差最大值发生时的压缩机累计运行时间；tmin为Th与Ti温差最小值发生时的压缩机累计运行时间；t3为第三压缩机累计运行时间预设阀值；
7)若tmax≥t1，且tmin≤t2，转步骤8)；否则，转步骤2)；其中：t1为第一压缩机累计运行时间预设阀值；t2为第二压缩机累计运行时间预设阀值；
8)空调控制器显示故障，代码为缺冷媒保护；同时，压缩机关机。
进一步的，所述T1为0.5～10℃；T2为0.5～5℃；t1为1～180s；t2为10～300s；t3为1～180s；t4为5～360s；t5为1～20min。
进一步的，所述t1＜t2。
本发明的有益效果：
本发明设计合理，逻辑清楚，控制方便，可通过检测压缩机运行时间，以及室内换热器盘管温度和室内环境温度等参数，判断出空调器冷媒的泄露程度，及时保护压缩机，从而，可延长压缩机的使用寿命，提升空调器的经济型和可靠性。
附图说明
图1是本发明的系统结构示意图。
其中：1-压缩机；2-四通阀；3-室外换热器；4-节流部件；5-截止阀；6-室内换热器；7-气液分离器；8-盘管温度传感器；9-环境温度传感器。
具体实施方式
下面结合附图和实施例对本发明作进一步的说明。
如图1所示，一种定频空调器，包括由压缩机1、四通阀2、室外换热器3、节流部件4、室内换热器6和气液分离器7构成的冷媒循环回路，具体为：压缩机1的排气口和吸气口分别连接四通阀2和气液分离器7；该四通阀2的其他三个端口分别连接室外换热器3、室内换热器6和气液分离器7；所示室外换热器3和室内换热器6为串联，其间设置节流部件4；所示室内换热器6的两端还设有截止阀5。进一步的，所述室内换热器6的中盘上设有盘管温度传感器9，可检测室内换热器的中部温度；所述室内换热器6的旁边设有环境温度传感器10，可检测室内机的回风温度。所述压缩机为定频压缩机。
本发明一种定频空调器的缺冷媒保护方法，包括以下步骤：
1)空调器制冷运行，压缩机启动；
2)通过盘管温度传感器检测室内换热器中部温度Ti；通过环境温度传感器检测室内机回风温度Th；空调控制器记录压缩机累计运行时间t；
3)若Th-Ti≤T2，持续时间≥t4，转步骤8)；否则，转步骤2)；其中：T2为第二温度预设 阀值；t4为第四压缩机累计运行时间预设阀值；
4)若t≤t5，转步骤5)；否则，转步骤2)；其中：t5为第五压缩机累计运行时间预设阀值；
5)若(Th-Ti)max-(Th-Ti)min≥T1，转步骤6)；否则，转步骤2)；其中：T1为第一温度预设阀值；
6)若0＜tmin-tmax≤t3，转步骤7)；否则，转步骤2)；其中：tmax为Th与Ti温差最大值发生时的压缩机累计运行时间；tmin为Th与Ti温差最小值发生时的压缩机累计运行时间；t3为第三压缩机累计运行时间预设阀值；
7)若tmax≥t1，且tmin≤t2，转步骤8)；否则，转步骤2)；其中：t1为第一压缩机累计运行时间预设阀值；t2为第二压缩机累计运行时间预设阀值；t1＜t2；
8)空调控制器显示故障，代码为缺冷媒保护；同时，压缩机关机。
进一步的，所述T1为0.5～10℃；T2为0.5～5℃；t1为1～180s；t2为10～300s；t3为1～180s；t4为5～360s；t5为1～20min。
本发明的控制原理为：
1.当空调器中无冷媒时，压缩机启动后，因为没有冷媒蒸发吸热，此时Ti不会随压缩机的运转而变化，因此，通过判断Th-Ti≤T2，且持续时间达到第四累计运行时间预设阀值等条件是否成立，即可判断空调器是否为缺冷媒。
2.当空调器保有的冷媒量较低时，压缩机启动后，室内换热器的气态冷媒会迅速被吸回压缩机。此时室内换热器中冷媒压力降低，迫使液态冷媒蒸发成气态，冷媒相变迅速吸热使Ti降低。随着冷媒被压缩机压缩后经过冷凝和膨胀，有大量低温低压的冷媒进入室内换热器换热。但是，由于冷媒循环量不足，使冷媒在蒸发器前段就已经过热，使Ti升高并维持在一个相对稳定的状态。因此，当压缩机累计运行时间小于第五累计运行时间预设阀值时，通过判断(Th-Ti)max-(Th-Ti)min≥T1，0＜tmin-tmax≤t3，以及tmax≥t1，且tmin≤t2等条件是否成立，即可判断空调器是否为缺冷媒。
本发明未涉及部分均与现有技术相同或可采用现有技术加以实现。

Claims (3)

  1. 一种定频空调器缺冷媒保护方法，包括由压缩机、四通阀、室外换热器、节流部件、室内换热器和气液分离器构成的冷媒循环回路，其特征是：所述室内换热器的中盘上设有盘管温度传感器；所述室内换热器的旁边设有环境温度传感器；所述保护方法包括以下步骤：
    1)空调器制冷运行，压缩机启动；
    2)通过盘管温度传感器检测室内换热器中部温度Ti；通过环境温度传感器检测室内机回风温度Th；空调控制器记录压缩机累计运行时间t；
    3)若Th-Ti≤T2，持续时间≥t4，转步骤8)；否则，转步骤2)；其中：T2为第二温度预设阀值；t4为第四压缩机累计运行时间预设阀值；
    4)若t≤t5，转步骤5)；否则，转步骤2)；其中：t5为第五压缩机累计运行时间预设阀值；5)若(Th-Ti)max-(Th-Ti)min≥T1，转步骤6)；否则，转步骤2)；其中：T1为第一温度预设阀值；
    6)若0＜tmin-tmax≤t3，转步骤7)；否则，转步骤2)；其中：tmax为Th与Ti温差最大值发生时的压缩机累计运行时间；tmin为Th与Ti温差最小值发生时的压缩机累计运行时间；t3为第三压缩机累计运行时间预设阀值；
    7)若tmax≥t1，且tmin≤t2，转步骤8)；否则，转步骤2)；其中：t1为第一压缩机累计运行时间预设阀值；t2为第二压缩机累计运行时间预设阀值；
    8)空调控制器显示故障，代码为缺冷媒保护；同时，压缩机关机。
  2. 根据权利要求1所述的定频空调器缺冷媒保护方法，其特征是：所述T1为0.5～10℃；T2为0.5～5℃；t1为1～180s；t2为10～300s；t3为1～180s；t4为5～360s；t5为1～20min。
  3. 根据权利要求1所述的定频空调器缺冷媒保护方法，其特征是：所述t1＜t2。
PCT/CN2020/092072 2019-10-16 2020-05-25 一种定频空调器缺冷媒保护方法 WO2021073098A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910980776.7A CN110645673B (zh) 2019-10-16 2019-10-16 一种定频空调器缺冷媒保护方法
CN201910980776.7 2019-10-16

Publications (1)

Publication Number Publication Date
WO2021073098A1 true WO2021073098A1 (zh) 2021-04-22

Family

ID=69012935

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/092072 WO2021073098A1 (zh) 2019-10-16 2020-05-25 一种定频空调器缺冷媒保护方法

Country Status (2)

Country Link
CN (1) CN110645673B (zh)
WO (1) WO2021073098A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113531933A (zh) * 2021-07-05 2021-10-22 珠海格力电器股份有限公司 一种冷媒循环量调节方法、装置及空调系统
WO2024001316A1 (zh) * 2022-06-30 2024-01-04 海信空调有限公司 空调器

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110645673B (zh) * 2019-10-16 2021-03-16 南京天加环境科技有限公司 一种定频空调器缺冷媒保护方法
CN114251783B (zh) * 2021-12-18 2022-11-18 珠海格力电器股份有限公司 一种冷媒含量检测方法、装置及空调器
CN115540200A (zh) * 2022-08-26 2022-12-30 青岛海尔空调器有限总公司 用于检测冷媒异常的方法及装置、空调器、存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104655365A (zh) * 2014-12-30 2015-05-27 海信科龙电器股份有限公司 一种检测冷媒泄漏的方法及空调
CN105674507A (zh) * 2016-03-07 2016-06-15 广东美的制冷设备有限公司 空调冷媒检测方法及装置
JP2018155426A (ja) * 2017-03-16 2018-10-04 株式会社富士通ゼネラル 空気調和機
CN110645673A (zh) * 2019-10-16 2020-01-03 南京天加环境科技有限公司 一种定频空调器缺冷媒保护方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106196427A (zh) * 2016-06-29 2016-12-07 珠海格力电器股份有限公司 一种防止误报缺冷媒保护的控制方法
CN109539456A (zh) * 2017-09-21 2019-03-29 奥克斯空调股份有限公司 一种空调器室内机的保护方法及装置
CN109114747B (zh) * 2018-08-03 2022-07-12 奥克斯空调股份有限公司 一种空调缺氟检测方法、检测系统及空调
CN110173816B (zh) * 2019-06-17 2021-09-03 海信（山东）空调有限公司 一种空调制冷剂泄漏的检测方法及检测装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104655365A (zh) * 2014-12-30 2015-05-27 海信科龙电器股份有限公司 一种检测冷媒泄漏的方法及空调
CN105674507A (zh) * 2016-03-07 2016-06-15 广东美的制冷设备有限公司 空调冷媒检测方法及装置
JP2018155426A (ja) * 2017-03-16 2018-10-04 株式会社富士通ゼネラル 空気調和機
CN110645673A (zh) * 2019-10-16 2020-01-03 南京天加环境科技有限公司 一种定频空调器缺冷媒保护方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113531933A (zh) * 2021-07-05 2021-10-22 珠海格力电器股份有限公司 一种冷媒循环量调节方法、装置及空调系统
WO2024001316A1 (zh) * 2022-06-30 2024-01-04 海信空调有限公司 空调器

Also Published As

Publication number Publication date
CN110645673A (zh) 2020-01-03
CN110645673B (zh) 2021-03-16

Similar Documents

Publication Publication Date Title
WO2021073098A1 (zh) 一种定频空调器缺冷媒保护方法
CN105627524B (zh) 空调器防冻结控制方法及空调器
US11015828B2 (en) Refrigeration system with utilization unit leak detection
CN100529604C (zh) 制冷剂充注量损失和膨胀阀故障的检测
CN100476323C (zh) 制冷系统中的制冷剂充注量的损失诊断
CN101178236A (zh) 一种空调器故障检测方法及系统
CN104215001A (zh) 双级压缩机空调器系统及其控制方法
EP3734177B1 (en) Control method for air conditioner
CN109631229A (zh) 制冷系统制冷剂快速泄漏的判定方法
WO2005093345A1 (en) Monitoring refrigerant charge
WO2017006474A1 (ja) 冷凍サイクル装置、遠隔監視システム、遠隔監視装置および異常判定方法
CN101566517A (zh) 空调器中制冷剂泄漏的判断方法
CN104819547A (zh) 一种变频空调系统开机时的缺氟检测及保护方法和系统
WO2019011095A1 (zh) 空调运行控制方法
CN103398520A (zh) 空调系统及其气液分离器的液位检测方法
CN104566763A (zh) 空调系统的控制方法、控制装置和空调系统
CN105805903A (zh) 空调器及其防泄漏控制方法
CN110906505B (zh) 一种空调冷媒泄露检测方法及空调
CN109297148B (zh) 热泵机组、其制冷启动低压保护方法、计算机设备和存储介质
CN109282425A (zh) 一种空调系统及其压力异常的自检测方法
CN103557578A (zh) 风冷模块式冷热水机组缺氟的保护方法
WO2021078033A1 (zh) 控制压缩机加热带的方法
CN109539456A (zh) 一种空调器室内机的保护方法及装置
CN110173816B (zh) 一种空调制冷剂泄漏的检测方法及检测装置
WO2022194218A1 (zh) 一拖多空调器的压缩机频率的控制方法及一拖多空调器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20875706

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20875706

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 20875706

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 17/01/2023)

122 Ep: pct application non-entry in european phase

Ref document number: 20875706

Country of ref document: EP

Kind code of ref document: A1