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WO2009096620A1 - Procédé et appareil pour protéger un compresseur de système de climatisation - Google Patents

Procédé et appareil pour protéger un compresseur de système de climatisation Download PDF

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Publication number
WO2009096620A1
WO2009096620A1 PCT/KR2008/000637 KR2008000637W WO2009096620A1 WO 2009096620 A1 WO2009096620 A1 WO 2009096620A1 KR 2008000637 W KR2008000637 W KR 2008000637W WO 2009096620 A1 WO2009096620 A1 WO 2009096620A1
Authority
WO
WIPO (PCT)
Prior art keywords
compressor
crankcase heater
ambient temperature
heating time
air
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/KR2008/000637
Other languages
English (en)
Inventor
Moon Hee Lee
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.)
Carrier Corp
Original Assignee
Carrier Corp
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 Carrier Corp filed Critical Carrier Corp
Priority to PCT/KR2008/000637 priority Critical patent/WO2009096620A1/fr
Priority to KR1020107017791A priority patent/KR20100115757A/ko
Publication of WO2009096620A1 publication Critical patent/WO2009096620A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F24F11/70—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
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • 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
    • F24F11/48—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring prior to normal operation, e.g. pre-heating or pre-cooling
    • 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
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—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
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • 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
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/01—Heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/26—Problems to be solved characterised by the startup of the refrigeration cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2106—Temperatures of fresh outdoor air

Definitions

  • the present invention relates to a method and an apparatus for protecting a compressor of an air-conditioning system, in particular, a method and an apparatus for protecting a compressor of an air-conditioning system by increasing the temperature in the compressor to prevent dilution of oil.
  • the refrigerant discharged from a compressor is condensed in a condenser.
  • the condensed refrigerant is expanded in an expansion device and then evaporated in an evaporator.
  • Accumulators are positioned on the suction side of the compressor in order to filter the liquid-phase refrigerants which have not been evaporated in the evaporator, thereby preventing the liquid-phase refrigerant from flowing into the compressor.
  • crankcase heaters have been designed to solve the problem of liquid refrigerating migrating into the crankcase or sump of a compressor during a shut-down cycle of an air-conditioner.
  • Such crankcase heaters are normally energized continuously even though they are only necessary when the liquid-phase refrigerants flow into the compressor.
  • Such heaters may be electrical resistance elements which are installed directly in the sump of the compressor, or may be wrapped around the outer surface of the compressor casing so that it enables heat transfer to the oil stored in the simp.
  • crankcase heaters When the air-conditioner turns on, crankcase heaters are energized and evaporate the liquid-phase refrigerants to protect the compressor. However, if the air-conditioner is not used for a long time, users may remove power to the air conditioning by merely unplugging the air conditioning system unit. During this period, the operation of crankcase heater stops since crankcase heater is unable to operate without power. As a result, the liquid-phase refrigerants flow into the compressor and dilute oil.
  • the present invention is to solve the above -noted problems in the art, where it provides a method and an apparatus for protecting a compressor of an air-conditioning system by eliminating the liquid refrigerant in the compressor by pre-heating the compressor during a predetermined time based on the ambient temperature, when the air-conditioner is operated again after being shut down for a long time.
  • the present invention is embodied to a method for protecting a compressor of an air-conditioning system.
  • the method comprises sensing connection of a power of the air-conditioning system, starting the operation of the crankcase heater, detecting the temperature by an ambient temperature sensor, determining a pre-heating time of the compressor based on the ambient temperature detected by the ambient temperature sensor, continuing the pre-heating of the compressor by the crankcase heater during the determined pre-heating time of the compressor, and starting the operation of the compressor when the determined pre- heating time of the compressor is over.
  • the present invention embodies an apparatus for protecting a compressor of an air-conditioning system.
  • the apparatus comprises a crankcase heater heating the bottom part of the compressor, an ambient temperature sensor detecting the outdoor temperature, and a control unit connected to the crankcase heater and the ambient temperature sensor for controlling the crankcase heater.
  • the control unit comprises a preheating time determination part determining a pre -heating time of the compressor based on the temperature detected by the ambient temperature sensor, a crankcase heater driving part continuing the pre-heating of the compressor by the crankcase heater during the determined pre-heating time of the compressor, and a compressor driving part starting the operation of the compressor once it is determined that the preheating time of compressor is over.
  • the method and apparatus for protecting a compressor of an air-conditioner can be applied to a variable capacity compressor compressing refrigerant depending on a duty control signal which determines a loading time and an unloading time.
  • the present invention prevents dilution of oil with the compressor refrigerant.
  • the ability to lubricate is maintained and thereby the lifespan of the compressor is enhanced and the compressor failure is prevented.
  • the method for protecting a compressor according to the present invention is significant.
  • the air-conditioner according to the present invention pre -heats the compressor during the required pre-heating time based on the ambient temperature by properly predicting the required pre-heating time for starting the compressor.
  • the present invention provides a more efficient use of an air-conditioning system compared to those requiring pre-heating the compressor for a long time.
  • Figure 1 is a schematic diagram illustrating an air conditioner according to an embodiment of the present invention.
  • Figure 2 is a control flow chart illustrating a method for protecting a compressor of an air-conditioner according to an embodiment of the present invention.
  • Figure 3 is an oil dilution chart illustrating the relationship between the inlet pressure of the compressor and the temperature of the bottom part of the compressor according to an embodiment of the present invention.
  • Figure 4 is a diagram illustrating the testing method for obtaining a pre -heating time of a crankcase heater corresponding to the outdoor temperature based on the oil dilution chart of Figure 3 according to an embodiment of the present invention.
  • Figure 5 is a diagram illustrating the relationship between the outdoor temperature and the pre -heating time of a crankcase heater according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram illustrating the control unit according to an embodiment of the present invention. Best Mode for Carrying Out the Invention
  • FIG. 1 is a schematic diagram illustrating an air conditioner according to an embodiment of the present invention.
  • An air conditioner (1) comprises an outdoor unit (10) and an indoor unit (20) As shown in Fig. 1, one outdoor unit (10) can be connected to one or more indoor units (20)
  • the outdoor unit (10) comprises a compressor (2), an accumulator (4), an outdoor electromotor valve (5), an outdoor heat exchanger (6), an outdoor fan (7), an outdoor fan motor (8), and a direction control valve (9)
  • a compressor (2) comprises a crankcase heater (11), an inlet port (14), and a discharge port (15)
  • An ambient temperature sensor (3) is installed on the outdoor heat exchanger (6)
  • the indoor unit (20) comprises an indoor heat exchanger (21), an indoor fan (22), an indoor fan motor (23), and an indoor electromotor valve (24)
  • the air conditioner (1) further comprises a control unit (30)
  • the control unit (30) determines a pre-heating time of the compressor (2) by the crankcase heater (11) based on the ambient temperature measured at the ambient temperature sensor (3) and controls the compressor (2) to start after the pre-heating time.
  • the control unit (30) also controls the operation of fan motors (8, 23) or electromotor valves (5, 24)
  • the compressor (2) can be a variable capacity compressor.
  • a variable capacity compressor may further comprise a pulse width modulated valve (12) and a bypass conduit (13) compared to a conventional compressor.
  • a conventional variable revolution compressor can vary its capacity by an inverter control in such a way that the revolution of a motor is controlled by varying the frequency of the current applied to the motor.
  • the conventional variable revolution compressor had certain problems in that the re- volution of the motor cannot be controlled with a desirable response and accuracy because the rotating motor has to be controlled directly. Further, since the revolution of the motor is frequently varied, vibrations and noises occur, and thereby the lifespan of compressor is reduced.
  • the variable capacity compressor (2) periodically experiences the loading state discharging the refrigerant and unloading state not discharging the refrigerant during its operation.
  • the ratio of the loading time and unloading time is controlled by a pulse width modulation method.
  • a bypass conduit (13) connecting the upper portion of the compressor (2) to an inlet port (14) is installed to the casing of the compressor.
  • a Pulse Width Modulated (PWM) Valve (12) is installed on the bypass conduit (13) When the pulse width modulated valve (12) is closed and thus the bypass conduit (13) is closed, the compressor (2) discharges the refrigerant. This state is referred to as "a loading.” In this state, the compressor (2) is operated at 100% capacity. In contrast, when the pulse width modulated valve (12) is open and thus the bypass conduit (13) is open, the compressor (2) does not discharge the refrigerant. This state is referred to as "an unloading.” In this state, the compressor (2) is operated at 0% capacity.
  • the compressor (2) repeats loading and unloading while the motor of the compressor rotates at a constant speed regardless of the loading and unloading. However, the compressor operates at between 0% and 100% capacity in accordance with the ratio of the loading and the unloading.
  • Fig. 2 is a control flow chart illustrating a method for protecting a compressor of an air-conditioner according to an embodiment of the present invention. The method is described with reference to Fig. 2.
  • control unit (30) senses connection of power of the air-conditioning system (Step Sl), and a crankcase heater (11) starts the operation (Step S2)
  • An ambient temperature sensor (3) measures the temperature (Step S3)
  • a thermistor can be used as an ambient temperature sensor.
  • Fig. 2 illustrates that an ambient temperature sensor measures the temperature after the crankcase heater (11) starts to operate. However, these two steps can be performed in a reverse order or simultaneously.
  • a control unit (30) determines a pre-heating time of the compressor (2) by a crankcase heater (11) based on the ambient temperature, which required the oil in the oil simp of the compressor be placed within a safe area (Step S4)
  • the "safe area” in the description of the present specification and claims means a safe region where it is substantially free of the liquid refrigerant. There is thus little concern for damaging the compressor when the compressor of the air-conditioner starts to operate.
  • the control unit (30) determines whether the operating time of the crankcase heater
  • Step 5 If the pre-heating time is passed, the control unit starts to operate the compressor of the air-conditioner.
  • Fig. 3 illustrates an oil dilution chart according to the inlet pressure of the compressor and the temperature of the bottom part of the compressor.
  • the X-axis indicates the inlet pressure of the compressor expressed by kg/c ⁇ f and the Y-axis indicates the temperature of the bottom part of the compressor expressed by 0 C, in the chart.
  • the chart shows a safe area, an unsafe area, and an intermediate area.
  • the "unsafe area” refers to the region where starting the compressor is not desirable since a substantial amount of the liquid refrigerant is present in the compressor and oil is diluted.
  • the "intermediate area” becomes a safe area during the heating operation. However, that area becomes an unsafe area during the cooling operation since a high super heating is necessary at the inlet of the compressor during the cooling operation.
  • the pre-heating time of the compressor is the time that the oil in the compressor reaches to a safe area, either during the heating operation or the cooling operation.
  • the pre-heating time can be determined as the time that the oil in the compressor reaches a safe area during the cooling operation but merely reaches to an intermediate area during the cooling operation.
  • FIG. 4 is a diagram illustrating the testing method obtaining the pre-heating time of the crankcase heater corresponding to the outdoor temperature on oil dilution chart of Fig. 3.
  • the above test is conducted in a chamber which can maintain the interior temperature constant.
  • the test sequence is as follows. At first, an air-conditioner (1) with a compressor (2) is placed in the chamber while maintaining the temperature in the chamber constant. The inlet pressure of the compressor (2) and the temperature of the bottom part of the compressor are measured. The temperature of the bottom part of the compressor is measured around the oil sunp of the compressor. And then, the inlet pressure of the compressor and the temperature of the bottom part of the compressor are measured continuously while a crankcase heater (11) pre-heats the compressor (2) The test result like Fig.
  • Lines indicated by (a), (b), (c), (d), and (e) are the test results where the ambient temperatures are -1O 0 C, -5°C, 0 0 C, 5 0 C, 10 0 C, respectively.
  • the crankcase heater (11) starts to heat, the temperature of the bottom part of the compressor is identical to ambient temperature.
  • the oil in a compressor of an air-conditioner which has been stopped for a long time, is placed in the unsafe area.
  • the lines (a), (b), (c), (d), and (e) are minimun movement sections for reaching from the unsafe area to the safe area. The consuming time to move this section is determined as the pre-heating time of the compressor.
  • Fig. 5 illustrates an example of the pre-heating time based on the ambient temperature, which is determined by the above test.
  • Fig. 5 illustrates the test result for an air-conditioner with an 1 IkW system capacity.
  • the ambient temperature becomes lower, the amount of the liquid refrigerant is larger and thereby a longer pre-heating time is necessary.
  • the pre-heating time is about 30 minutes.
  • the pre-heating time is about 40 minutes at O 0 C, and about 56 minutes at -10 0 C. As such, the pre-heating time increases as the ambient temperature decreases.
  • the pre-heating time of the compressor corresponding to the ambient temperature can be varied according to the capacity of the air-conditioner, size or type of the compressor, the compressing method and the like.
  • the pre-heating time of the compressor is obtained experimentally for each type of the air-conditioner.
  • the mapping data of the pre-heating time based on the ambient temperature, obtained by the above test, can be stored in a storage medrun (not shown) in the air-conditioner (1)
  • the storage maximn (not shown) can be provided in the control unit (30) or be embodied to a separate memory device outside the control unit.
  • Fig. 6 illustrates the control unit (30) according to an embodiment of the present invention.
  • the control unit (30) comprises a pre-heating time determination part (31) for determining the pre-heating time of the compressor based on the temperature measured by an ambient temperature sensor (3), a crankcase heater driving part (32) continuing the pre-heating of the compressor by the crankcase heater during the determined pre-heating time of the compressor, a compressor driving part (33) staring the operation of the compressor when determined as the pre-heating time of compressor is over.
  • control unit (30) may include a pulse width modulated valve control part (34) for determining the ratio of the loading time and the unloading time of the pulse width modulated valve (12), a fan motor driving part (35) for controlling the drive of the indoor and outdoor fan motors (8, 23), and an electromotor valve driving part (36) for controlling the drive of the indoor and outdoor electromotor valves (5, 24)
  • a pulse width modulated valve control part (34) for determining the ratio of the loading time and the unloading time of the pulse width modulated valve (12)
  • a fan motor driving part (35) for controlling the drive of the indoor and outdoor fan motors (8, 23)
  • an electromotor valve driving part (36) for controlling the drive of the indoor and outdoor electromotor valves (5, 24)
  • Mapping data of the pre-heating time based on the ambient temperature can be stored in a storage maximn (not shown) in the pre-heating time determination part (31)
  • the storage medium can be embodied to a separate memory device outside the control unit (30)

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Signal Processing (AREA)
  • Fluid Mechanics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

La présente invention concerne un procédé destiné à protéger un compresseur de système de climatisation, comportant les étapes consistant à : détecter le raccordement du système de climatisation à une alimentation, mettre en marche le réchauffeur de carter, détecter la température à l'aide du capteur de température ambiante, déterminer un temps de préchauffage du compresseur sur la base de la température ambiante détectée par le capteur de température ambiante, poursuivre le préchauffage du compresseur par le réchauffeur de carter pendant le temps déterminé de préchauffage du compresseur, et mettre en marche le compresseur lorsque le temps déterminé de préchauffage du compresseur est écoulé.
PCT/KR2008/000637 2008-02-01 2008-02-01 Procédé et appareil pour protéger un compresseur de système de climatisation Ceased WO2009096620A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/KR2008/000637 WO2009096620A1 (fr) 2008-02-01 2008-02-01 Procédé et appareil pour protéger un compresseur de système de climatisation
KR1020107017791A KR20100115757A (ko) 2008-02-01 2008-02-01 공기조화기의 압축기 보호 방법 및 장치

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2008/000637 WO2009096620A1 (fr) 2008-02-01 2008-02-01 Procédé et appareil pour protéger un compresseur de système de climatisation

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WO2009096620A1 true WO2009096620A1 (fr) 2009-08-06

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2589898A3 (fr) * 2011-11-04 2014-01-15 Emerson Climate Technologies GmbH Système de gestion de l'huile pour compresseur
JP2014126309A (ja) * 2012-12-27 2014-07-07 Hitachi Appliances Inc 空気調和機
US9181939B2 (en) 2012-11-16 2015-11-10 Emerson Climate Technologies, Inc. Compressor crankcase heating control systems and methods
US9353738B2 (en) 2013-09-19 2016-05-31 Emerson Climate Technologies, Inc. Compressor crankcase heating control systems and methods
US9810218B2 (en) 2009-09-24 2017-11-07 Emerson Climate Technologies Crankcase heater systems and methods for variable speed compressors
WO2019155737A1 (fr) * 2018-02-07 2019-08-15 三菱重工サーマルシステムズ株式会社 Dispositif de commande, système de réfrigération de fluide frigorigène, et procédé de rapport
CN113847687A (zh) * 2021-09-18 2021-12-28 珠海格力电器股份有限公司 压缩机预热控制方法与装置
CN114234375A (zh) * 2021-12-17 2022-03-25 珠海格力电器股份有限公司 一种压缩机预热控制方法、装置、存储介质及空调
US11435125B2 (en) 2019-01-11 2022-09-06 Carrier Corporation Heating compressor at start-up
US11624539B2 (en) 2019-02-06 2023-04-11 Carrier Corporation Maintaining superheat conditions in a compressor
CN118009505A (zh) * 2024-02-04 2024-05-10 Tcl空调器(中山)有限公司 压缩机预热控制方法、装置、电子设备及计算机存储介质
CN119617594A (zh) * 2024-12-20 2025-03-14 珠海格力电器股份有限公司 制冷系统的控制方法及装置、计算机可读存储介质

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US4444017A (en) * 1982-03-29 1984-04-24 Carrier Corporation Method and apparatus for controlling the operation of a compressor crankcase heater
JPH08114346A (ja) * 1994-10-18 1996-05-07 Daikin Ind Ltd 空気調和機
JP2000154927A (ja) * 1998-11-20 2000-06-06 Fujitsu General Ltd 空気調和機の制御方法
US6962058B2 (en) * 2001-11-24 2005-11-08 Samsung Electronics Co., Ltd. Air conditioner and method of controlling such

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Publication number Priority date Publication date Assignee Title
US4444017A (en) * 1982-03-29 1984-04-24 Carrier Corporation Method and apparatus for controlling the operation of a compressor crankcase heater
JPH08114346A (ja) * 1994-10-18 1996-05-07 Daikin Ind Ltd 空気調和機
JP2000154927A (ja) * 1998-11-20 2000-06-06 Fujitsu General Ltd 空気調和機の制御方法
US6962058B2 (en) * 2001-11-24 2005-11-08 Samsung Electronics Co., Ltd. Air conditioner and method of controlling such

Cited By (17)

* Cited by examiner, † Cited by third party
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US9810218B2 (en) 2009-09-24 2017-11-07 Emerson Climate Technologies Crankcase heater systems and methods for variable speed compressors
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