EP2446201B1 - Wartungsmaschine für kälteanlagen - Google Patents

Wartungsmaschine für kälteanlagen Download PDF

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Publication number
EP2446201B1
EP2446201B1 EP10724735.5A EP10724735A EP2446201B1 EP 2446201 B1 EP2446201 B1 EP 2446201B1 EP 10724735 A EP10724735 A EP 10724735A EP 2446201 B1 EP2446201 B1 EP 2446201B1
Authority
EP
European Patent Office
Prior art keywords
compressor
motor
vacuum pump
maintenance machine
maintenance
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.)
Active
Application number
EP10724735.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2446201A2 (de
Inventor
Gerd H. Rabe
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.)
Inficon GmbH Deutschland
Original Assignee
Inficon GmbH Deutschland
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 Inficon GmbH Deutschland filed Critical Inficon GmbH Deutschland
Publication of EP2446201A2 publication Critical patent/EP2446201A2/de
Application granted granted Critical
Publication of EP2446201B1 publication Critical patent/EP2446201B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • 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
    • F25B2345/005—Service stations therefor
    • F25B2345/0051—Service stations therefor having a carrying handle

Definitions

  • the invention relates to a maintenance machine for refrigeration systems, with a compressor which is driven by a motor.
  • the service technician uses different maintenance machines, which he has to transport to the place of use.
  • the maintenance machines are generally carried in a vehicle and then have to unload on site and possibly be carried over stairs and longer distances to the site.
  • the maintenance machines include a Refrigerant Recovery Machine (RRM) and a Vacuum Pump (VP). These maintenance machines are used independently and at different times.
  • RRM Refrigerant Recovery Machine
  • VP Vacuum Pump
  • Each maintenance machine is relatively heavy (12-14 kg) and is the size of a small suitcase.
  • the refrigerant recovery machine further includes a storage tank and a Libra. For example, if a service technician wants to seal a leak on a refrigerant circuit, the circuit must first be drained.
  • the environmental regulations require that the refrigerant removed from the system be collected and that any refrigerant vapor together with the refrigerant be led into a refrigerant recovery tank.
  • the maintenance machine is equipped with a compressor which compresses the discharged refrigerant and pumps it into a storage tank.
  • Another type of maintenance machine includes a vacuum pump driven by its own motor. With the vacuum pump, air and water vapor are extracted from the pipe system of the refrigeration system, after the refrigerant has been drained. Moisture and refrigerant are incompatible.
  • the vacuum pump serves to dry the piping system. For this purpose, a certain vacuum must be maintained for a certain time.
  • the invention has for its object to provide a maintenance machine for refrigeration systems, in which the drive of the compressor and vacuum pump is simplified and does not require a switching operation for actuating a clutch.
  • the maintenance machine according to the present invention is defined by claim 1.
  • the invention has for its object to provide a maintenance machine for refrigeration systems, which combines various functions, has a low weight and significantly reduces the investment costs for the service company.
  • the maintenance machine according to the present invention is defined by claim 1.
  • a first freewheel is provided between the engine and the compressor and a second freewheel is provided between the engine and the vacuum pump.
  • the direction of rotation of the motor is reversible and the driving rotational directions of the first and the second freewheel are opposite to each other, so that the motor in one direction of rotation drives the compressor and in the other direction of rotation, the vacuum pump.
  • clutches are not required for coupling the respective machine to the engine.
  • the choice of the machine to be operated, compressor or vacuum pump, is made by operating the direction switch of the motor.
  • the engine is in a reversible electric motor.
  • the motor shaft drives a fan which ventilates a cooler connected to the compressor when the compressor is driven.
  • the blower may also be connected to the engine in such a way that it operates in each direction of rotation of the engine.
  • the compressor may be a reciprocating compressor with linearly moving piston.
  • a valve device which has a first port which is connected to the inlets of the compressor and the vacuum pump, and two further ports which can be connected to refrigerant lines of the refrigeration system, wherein the valve device in a first state, the first port with a the further terminals and in a second state connects the first terminal with the other of the other terminals.
  • the maintenance technician thus needs to connect the refrigeration system with only two hoses with the maintenance machine to perform the same machine with both the draining of the refrigerant and the dehumidification of the circuit.
  • FIG. 1 a refrigeration system is shown, for example, an air conditioner in a building.
  • the refrigeration system 10 includes a refrigerant circuit 11 in which a refrigerant such as Frigen circulates.
  • the refrigerant circuit includes a flash nozzle 12 and an evaporator 13.
  • the evaporator is on Heat exchanger, which releases the resulting from the relaxation process cold to the environment to be cooled.
  • a conduit 14 From the outlet of the evaporator 13, a conduit 14 leads to the inlet 15 of a compressor 16.
  • the compressor 16 has an outlet 17, which is connected to a condenser 18.
  • the condenser 18 is a heat exchanger which releases the heat generated during the compression of the initially gaseous refrigerant to the environment.
  • the outlet of the condenser 18 is connected via a line 19 to the line 20 leading to the inlet of the evaporator 13.
  • an access port 22 is provided for the connection of a maintenance machine.
  • Another access port 23 is located at the inlet 15 of the compressor 16.
  • a mobile maintenance machine 30 is provided, which is carried by the service technician.
  • the internal structure of the maintenance machine 30 will be explained later.
  • a tank 32 is connected, which receives the refrigerant.
  • the tank 32 is a closed pressure tank.
  • the maintenance machine 30 further includes a valve device 35, which in FIG. 1 is shown separately. Physically, the valve device is integrated into the maintenance machine.
  • the valve device 35 includes two manually operated valves 36 and 37.
  • a first port 38 of the valve device is connected via a line 39 to the compressor and the vacuum pump of the maintenance machine 30.
  • Another port 40 is connected via a hose 41 with the access port 22.
  • Another port 42 is connected via a hose 43 with the access port 23.
  • the valve 36 controls the connection between the ports 38 and 40.
  • the valve 37 controls the connection between the ports 38 and 42.
  • the valve device is provided with manometers 44 and 45.
  • FIG. 2 shows the internal structure of the maintenance machine 30.
  • the maintenance machine includes a motor 34, the motor shaft protrudes at opposite ends of the motor housing.
  • the shaft end 46a is connected via a first freewheel 47 to the input shaft 48 of a compressor 49.
  • the shaft end 46b is connected via a second freewheel 50 to the input shaft 51 of a vacuum pump 52.
  • the freewheels 47 and 50 couple the two adjacent shafts only in one direction of rotation, the driving direction, while the waves in the opposite direction, the freewheeling direction, are decoupled.
  • the driving directions of both freewheels 47 and 50 are, with respect to the motor shaft, opposite to each other.
  • the freewheel 47 is operated in the driving direction, wherein the shaft end 46a is coupled to the input shaft 48 of the compressor 49 and this entrains.
  • the input shaft 51 of the vacuum pump 52 is decoupled from the shaft end 46b.
  • the input shaft 48 of the compressor 49 is decoupled from the shaft end 46a, while the input shaft 51 of the vacuum pump 52 is entrained by the shaft end 46b.
  • the freewheels 47 and 50 also have the function of ball bearings. They are designed similar to ball bearings and have an outer ring which is connected to one shaft and an inner ring which is connected to the other shaft.
  • the freewheels can also be referred to as a one-way clutch.
  • the motor 34 is reversible, so that it can be switched between clockwise and counterclockwise rotation. In one direction of rotation, only the compressor 49 and in the other direction of rotation, only the vacuum pump 52 is driven.
  • the compressor 49 has an inlet 55 and an outlet 56 to which respective hoses can be connected.
  • the vacuum pump 52 also has an inlet 57 and an outlet 58.
  • the line 39 ( FIG. 1 ) connectable with each of the inlets 55 and 57 of compressor and vacuum pump.
  • blower 60 in the form of a fan wheel, which sucks external air axially and accelerates in the radial direction.
  • FIG. 3 shows an embodiment of the structure of the maintenance machine as a portable device.
  • the in FIG. 3 The subject matter represented is not covered by the present claims.
  • the maintenance machine 30 has a housing 62 that can be placed on the floor and contains all the components, including the valve device 35.
  • the housing 62 is provided with a handle 63 that allows the machine to be carried.
  • the motor 34 which is connected at one end to the compressor 49 and at the other end to the vacuum pump 52.
  • Engine, compressor and vacuum pump are arranged along a common axis and connected via the respective freewheels, which in FIG. 3 are not visible.
  • Between the motor housing and the vacuum pump 52 is a spacer cage 61, in which the fan 60 is arranged.
  • the fan 60 delivers sucked air radially outward into an air duct 64, which leads to a cooler 65.
  • the radiator 65 is connected to the outlet of the compressor 49 and cools the gas heated by compression.
  • a Ausströmgitter 66 is arranged, through which the cooling air leaves the housing 62.
  • the housing 62 has an externally accessible switching and connection desk 68, on which a switch for determining the direction of rotation of the motor 34 is arranged. Further switches are used to actuate the valve device 35.
  • 68 terminals 40 and 42 of the valve device are attached to the terminal console.
  • the use of the maintenance machine is carried out in such a way that the connection 40 of the maintenance machine via a hose 41 with the access port 22 of Refrigeration system 10 is connected ( FIG. 1 ).
  • the port 42 is connected via the hose 43 to the access port 23.
  • the compressor 49 is put into operation. This compresses the effluent from the refrigeration system 10 refrigerant and conveys it in a compressed state in a tank 32 (FIG. FIG. 1 ).
  • the refrigeration system is emptied, the refrigeration system is repaired to seal leaks.
  • the vacuum pump 52 is connected to the refrigeration system.
  • the vacuum pump 52 is put into operation. In this way, moisture is pumped out of the pipe system, so that it is completely emptied and dried. Finally, the refrigeration system is filled with refrigerant again.
  • the maintenance machine facilitates the emptying of a cold plant for the maintenance technician.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
EP10724735.5A 2009-06-23 2010-05-27 Wartungsmaschine für kälteanlagen Active EP2446201B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009029923A DE102009029923A1 (de) 2009-06-23 2009-06-23 Wartungsmaschine für Kälteanlagen
PCT/EP2010/057349 WO2010149461A2 (de) 2009-06-23 2010-05-27 Wartungsmaschine für kälteanlagen

Publications (2)

Publication Number Publication Date
EP2446201A2 EP2446201A2 (de) 2012-05-02
EP2446201B1 true EP2446201B1 (de) 2017-08-23

Family

ID=43217722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10724735.5A Active EP2446201B1 (de) 2009-06-23 2010-05-27 Wartungsmaschine für kälteanlagen

Country Status (7)

Country Link
US (1) US8740582B2 (enrdf_load_stackoverflow)
EP (1) EP2446201B1 (enrdf_load_stackoverflow)
JP (1) JP5642781B2 (enrdf_load_stackoverflow)
CN (1) CN102460041A (enrdf_load_stackoverflow)
DE (1) DE102009029923A1 (enrdf_load_stackoverflow)
ES (1) ES2644855T3 (enrdf_load_stackoverflow)
WO (1) WO2010149461A2 (enrdf_load_stackoverflow)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110033318A1 (en) * 2009-08-05 2011-02-10 Ramirez Jr Emilio A Single Motor Multiple Pumps
KR101456622B1 (ko) 2013-01-04 2014-11-03 시종욱 전동 양수기
WO2015123129A1 (en) * 2014-02-11 2015-08-20 Sundheim Gregory S Portable, refrigerant recovery unit with condenser bypass
CN104006590A (zh) * 2014-05-28 2014-08-27 浙江振圣机电科技有限公司 带真空泵的便携式冷媒回收一体机
JP6583288B2 (ja) * 2014-12-22 2019-10-02 Ａｇｃ株式会社 作動媒体回収装置
CN106499646B (zh) * 2017-01-09 2019-10-15 淄博真空设备厂有限公司 新型真空压缩系统
DE102018001275A1 (de) 2018-02-17 2019-08-22 Oechsler Ag Aktuator
DE102018113677A1 (de) * 2018-06-08 2019-12-12 Dr. Ing. H.C. F. Porsche Aktiengesellschaft KFZ-Pumpenanordnung
CN111720287B (zh) * 2019-03-20 2022-07-12 上海海立电器有限公司 泵压机
US12215680B2 (en) 2019-12-16 2025-02-04 Praxair Technology, Inc. Portable, cryogenic fluid pump apparatus with associated instrumentation, conduit legs and accessories
US12135154B2 (en) 2021-10-04 2024-11-05 Andy Dominique Portable refrigerant management system

Citations (1)

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WO2004107534A1 (en) * 2003-06-03 2004-12-09 Marino Pedrazzini Bertolazzi A multi-purpose machine with two operating devices actuated by a single electric motor

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US3118463A (en) * 1961-11-29 1964-01-21 Madco Mfg Company Testing manifolds
US4283167A (en) * 1979-04-26 1981-08-11 Varian Associates, Inc. Cooling structure for an oil sealed rotary vacuum pump
GB2083865A (en) * 1980-09-13 1982-03-31 Lucas Industries Ltd Electrically driven fan and pump assembly
US5540254A (en) * 1994-09-01 1996-07-30 Mcgowan; Willie J. Apparatus for use in servicing and installing refrigeration systems without freon leakage
US5606862A (en) * 1996-01-18 1997-03-04 National Refrigeration Products Combined refrigerant recovery, evacuation and recharging apparatus and method
US5678415A (en) * 1996-01-18 1997-10-21 National Refrigeration Products Refrigerant recovery apparatus
JPH10131889A (ja) * 1996-10-25 1998-05-19 Mitsubishi Heavy Ind Ltd 冷凍機用圧縮機
US6860726B2 (en) * 2002-02-05 2005-03-01 The Boeing Company Dual drive for hydraulic pump and air boost compressor
US8225618B2 (en) * 2004-11-19 2012-07-24 Boyd David J Refrigerant recovery method and apparatus
CA2651721C (en) * 2006-05-04 2011-04-12 Brasscorp Limited Inspection port

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
WO2004107534A1 (en) * 2003-06-03 2004-12-09 Marino Pedrazzini Bertolazzi A multi-purpose machine with two operating devices actuated by a single electric motor

Also Published As

Publication number Publication date
DE102009029923A1 (de) 2010-12-30
WO2010149461A2 (de) 2010-12-29
CN102460041A (zh) 2012-05-16
WO2010149461A3 (de) 2011-05-19
ES2644855T3 (es) 2017-11-30
EP2446201A2 (de) 2012-05-02
JP2012530869A (ja) 2012-12-06
JP5642781B2 (ja) 2014-12-17
US8740582B2 (en) 2014-06-03
US20120100018A1 (en) 2012-04-26

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