EP2802828A2 - Verfahren zum betrieb einer kältemittelrückgewinnungs- und nachfüllvorrichtung - Google Patents

Verfahren zum betrieb einer kältemittelrückgewinnungs- und nachfüllvorrichtung

Info

Publication number
EP2802828A2
EP2802828A2 EP12787410.5A EP12787410A EP2802828A2 EP 2802828 A2 EP2802828 A2 EP 2802828A2 EP 12787410 A EP12787410 A EP 12787410A EP 2802828 A2 EP2802828 A2 EP 2802828A2
Authority
EP
European Patent Office
Prior art keywords
refrigerant recovery
refrigerant
recharge device
refrigeration equipment
recovery
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.)
Withdrawn
Application number
EP12787410.5A
Other languages
English (en)
French (fr)
Inventor
Pravin Swaminathan SAMUEL
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.)
Mahle International GmbH
Original Assignee
Robert Bosch GmbH
Robert Bosch Engineering and Business Solutions Pvt 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 Robert Bosch GmbH, Robert Bosch Engineering and Business Solutions Pvt Ltd filed Critical Robert Bosch GmbH
Publication of EP2802828A2 publication Critical patent/EP2802828A2/de
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F25B45/00—Arrangements for charging or discharging refrigerant
    • 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
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/001—Charging refrigerant to a 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
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/002—Collecting refrigerant from a 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
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/003—Control issues for charging or collecting refrigerant to or from a 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
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/007—Details for charging or discharging refrigerants; Service stations therefor characterised by the weighing of refrigerant or oil
    • 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
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/222—Detecting refrigerant leaks
    • 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
    • F25B2700/19—Pressures
    • 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

Definitions

  • This invention relates to refrigerant recovery and recharge device. Background of the invention
  • Refrigeration equipments are widely used in many applications including air conditioning systems, refrigerators and the like. These refrigeration equipments use one or a combination of refrigerants such as water, oils, industrial refrigerants and the like.
  • refrigerants such as water, oils, industrial refrigerants and the like.
  • the principle of working principle of the refrigeration equipment is such that the refrigerant absorbs heat while passing through various components of the refrigeration equipment. This cools the air around the refrigeration equipment and the cool air is then blown to the area or room where the refrigeration equipment is installed.
  • refrigerant recovery and recharge device For the purpose of recovering the refrigerant and recharging the refrigerant a refrigerant recovery and recharge device is used.
  • the refrigerant recovery device is usually a stand alone device which is connected to the refrigeration equipment while the refrigeration equipment is being serviced.
  • the refrigerant recovery device comprises at least, a valve block, a compressor and a tank.
  • the valve block comprises valves, which are usually solenoid valves. The valves in the valve block can be switched from a closed position to an open position to establish a connection between the refrigerant recovery device and the refrigeration equipment.
  • the compressor is a device which is capable of recovering the refrigerant from the refrigeration equipment and vapours based on the pressure difference between refrigeration equipment and the refrigerant recovery and recharge device.
  • the tank is used to store the recovered refrigerant.
  • the refrigeration equipment is usually vacuum sealed, thus no air is allowed to enter the refrigeration equipment. However, it is possible that due to a leak or some damage to the refrigeration equipment, air enters the refrigeration equipment. If air enters the refrigeration equipment the pressure in the refrigeration equipment would increase. If the pressure in the refrigeration equipment increases, then the difference in pressure between the refrigeration equipment refrigerant recovery and recharge device reduces. The reduced pressure difference would lead to incomplete recovery of the refrigerant. Thus the contaminated refrigerant will not be recovered from the refrigeration equipment. This reduces the efficiency of the refrigeration equipment to cool.
  • the invention as claimed in the independent claims has the following advantages.
  • the method to operate the refrigerant recovery and recharge device is able to indicate that only air is being recovered and hence the recovery should be stopped immediately. By preventing only air from the recovered it is possible to keep a check on the increase in pressure and temperature along the refrigerant recovery path of the refrigerant recovery and recharge device. By providing an indication of the increase in pressure and temperature it is possible to avoid any damage to the refrigeration equipment and to the refrigerant recovery and recharge device. This in turn would increase the life and efficiency of the refrigeration equipment and refrigerant recovery and recharge device.
  • Another advantage of this method of operating a refrigerant recovery and recharge device is that, the device is able to give an indication of a leak either in the refrigeration equipment or the refrigerant recovery and recharge device or the refrigerant recovery path, as the steep and sudden rise in pressure is an indication that air has entered a vacuum sealed refrigeration equipment and hence there is a leak.
  • Figure 1 illustrates a flowchart representing a method to operate a refrigerant recovery and recharge device.
  • FIG 1 illustrates a flowchart representing a method to operate a refrigerant recovery and recharge device.
  • the refrigerant recovery and recharge device is connected to refrigeration equipment.
  • a valve block in the refrigerant recovery and recharge device establishes a connection between the two.
  • Step 10 represents the step of starting the refrigerant recovery process. In the refrigerant recovery process the compressor of the refrigerant recovery and recharge device is switched on.
  • Step 12 represents the step of a pressure sensor continuously monitoring the pressure along the refrigerant recovery path in the refrigerant recovery and recharge device.
  • Step 14 represents the step of a temperature sensor continuously monitoring the temperature along the refrigerant recovery path in the refrigerant recovery and recharge device.
  • Step 16 represents the step of comparing the monitored pressure and temperature with the threshold values of pressure and temperature allowable in the recovery path.
  • Step 18 represents the step of indicating using an audio or visual indication to the operator of the refrigerant recovery and recharge device to stop recovery method immediately before any damage is caused.
  • the audio or visual indication is indicative that only air is being recovered which has entered the refrigeration equipment or the refrigeration recovery and recharge device due to leak either in the refrigeration equipment or the refrigerant recovery path.
  • the weight of the tank in the refrigerant recovery and recharge device is continuously monitored. The working principle of this method is as follows. When the recovery method is started there will be a constant increase temperature and pressure and there will no increase in weight of the tank in the refrigerant recovery and recharge device. No increase in weight of the tank is indicative that no refrigerant is being recovered but there is a continuous increase in temperature and pressure.
  • an audio or visual indication is provided to the operator of the refrigerant recovery and recharge device to stop the operation of the refrigerant recovery and recharge device.
  • the audio or visual indication is indicative that only air is being recovered which has entered the refrigeration equipment or the refrigeration recovery and recharge device due to leak either in the refrigeration equipment or the refrigerant recovery path.
  • the refrigerant recovery and recharge device used to recover refrigerant from the refrigeration equipment comprises a pressure sensor located in the refrigerant recovery path adapted means to continuously monitors the increase in pressure in the refrigerant recovery path. There is also provided in the refrigerant recovery path a temperature sensor which continuously monitors the temperature in the refrigerant recovery path.
  • a means to indicate an error condition in the refrigeration equipment or the refrigerant recovery and recharge device is provided in the refrigerant recovery and recharge device.
  • the means to indicate an error is an audio or visual means. If the pressure increases beyond a limit the audio or visual means provide an indication of an error condition in the refrigeration equipment or the refrigerant recovery and recharge device.
  • the refrigerant recovery and recharge device comprises a weighing scale to measure the quantity of refrigerant recovered during the recovery of the refrigerant.
  • the indication from the weighing scale, the pressure sensor and the temperature sensor is used to indicate an error condition in the refrigerant equipment or the refrigerant recovery and recharge device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Fluid Pressure (AREA)
EP12787410.5A 2011-11-08 2012-11-05 Verfahren zum betrieb einer kältemittelrückgewinnungs- und nachfüllvorrichtung Withdrawn EP2802828A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN3816CH2011 2011-11-08
PCT/EP2012/071807 WO2013068310A2 (en) 2011-11-08 2012-11-05 A method to operate a refrigerant recovery and recharge device

Publications (1)

Publication Number Publication Date
EP2802828A2 true EP2802828A2 (de) 2014-11-19

Family

ID=47189909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12787410.5A Withdrawn EP2802828A2 (de) 2011-11-08 2012-11-05 Verfahren zum betrieb einer kältemittelrückgewinnungs- und nachfüllvorrichtung

Country Status (2)

Country Link
EP (1) EP2802828A2 (de)
WO (1) WO2013068310A2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020185574A1 (en) * 2019-03-08 2020-09-17 The Chemours Company Fc, Llc Methods and systems for transporting, transferring, storing and using refrigerants

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5367888A (en) * 1991-03-22 1994-11-29 Environmental Products Amalgamated Pty. Ltd. Apparatus for servicing refrigeration systems
US5560215A (en) * 1992-05-14 1996-10-01 Talarico; Angelo Gas processor
US5934091A (en) * 1997-10-31 1999-08-10 Century Manufacturing Company Refrigerant recovery and recycling system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5172562A (en) * 1990-07-20 1992-12-22 Spx Corporation Refrigerant recovery, purification and recharging system and method
US5243828A (en) * 1992-12-28 1993-09-14 Carrier Corporation Control system for compressor protection in a manually operated refrigerant recovery apparatus
US7832222B2 (en) * 2007-12-07 2010-11-16 Spx Corporation Background tank fill based on refrigerant composition
US20110132018A1 (en) * 2009-12-08 2011-06-09 Sun-Wonder Industrial Co., Ltd. Electronic instrument for refrigerant recovery machine
IT1399282B1 (it) * 2010-04-02 2013-04-11 Texa Spa Stazione di ricarica/recupero di un fluido refrigerante in/da un impianto di condizionamento/climatizzazione di un veicolo

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5367888A (en) * 1991-03-22 1994-11-29 Environmental Products Amalgamated Pty. Ltd. Apparatus for servicing refrigeration systems
US5560215A (en) * 1992-05-14 1996-10-01 Talarico; Angelo Gas processor
US5934091A (en) * 1997-10-31 1999-08-10 Century Manufacturing Company Refrigerant recovery and recycling system

Also Published As

Publication number Publication date
WO2013068310A3 (en) 2013-08-22
WO2013068310A2 (en) 2013-05-16

Similar Documents

Publication Publication Date Title
US11635239B2 (en) Refrigeration system with purge and acid filter
US11035750B2 (en) Leak detection in a fluid compression system
US20130047635A1 (en) Starting method for a refrigerant recovery, recycling and recharging system
CN103982951A (zh) 多联机空调室外机及其控制方法
EP2562491B1 (de) Kühlsystem und Verfahren zum Betreiben eines Kühlsystems
WO2013068310A2 (en) A method to operate a refrigerant recovery and recharge device
EP2661595B1 (de) Verfahren zur messung des zu rückgewinnenden kältemittels
CN103998876B (zh) 制冷装置及用以检测其中是否填充有不同制冷剂的方法
US20090235673A1 (en) Detection of refrigerant release in co2 refrigerant systems
JP2007127326A (ja) 冷媒充填回路を備えたエンジン駆動式ヒートポンプ
KR102243654B1 (ko) 공기조화장치
EP2539646B1 (de) Verfahren zur wiederherstellung von kühlmittel einer kühlausrüstung
WO2020240158A1 (en) Vacuum pump for use during maintenance or commissioning of an hvac-r system, adapter for a vacuum pump, and a method of performing a vacuum test on an hvac-r system
JP5434985B2 (ja) 冷凍装置
EP2817573B1 (de) Kältemittelrückgewinnungs- und nachfüllvorrichtung
JP4448390B2 (ja) 冷凍装置
JP2012072919A (ja) 冷凍装置
JP2006349262A (ja) 作動液冷却装置
JP2007212077A (ja) 空気調和機
KR20160102794A (ko) 가혹 환경의 내구성을 향상시킨 에어컨 실외기
JP6427394B2 (ja) 冷凍装置
EP2635361A2 (de) Verfahren zur anzeige eines filterwechsels bei einer kühlmittelrückgewinnungs- und füllvorrichtung
ITTV20100038U1 (it) Stazione di ricarica, d'impianti di condizionamento mobile e con fluido frigorigeno infiammabile, con dispositivi di sicurezza.
CN105276877A (zh) 储液干燥器组件

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20140919

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MAHLE INTERNATIONAL GMBH

17Q First examination report despatched

Effective date: 20170728

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20180612