EP1585952A2 - Procede pour controler l'etancheite d'installations de climatisation dans des vehicules automobiles - Google Patents

Procede pour controler l'etancheite d'installations de climatisation dans des vehicules automobiles

Info

Publication number
EP1585952A2
EP1585952A2 EP03779701A EP03779701A EP1585952A2 EP 1585952 A2 EP1585952 A2 EP 1585952A2 EP 03779701 A EP03779701 A EP 03779701A EP 03779701 A EP03779701 A EP 03779701A EP 1585952 A2 EP1585952 A2 EP 1585952A2
Authority
EP
European Patent Office
Prior art keywords
adapters
measurement
air conditioning
pressure
measuring device
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Withdrawn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
EP03779701A
Other languages
German (de)
English (en)
Inventor
Uwe Meier
Guido KÄMMER
Roland Berger
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.)
Duerr Somac GmbH
Original Assignee
Duerr Somac GmbH
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 Duerr Somac GmbH filed Critical Duerr Somac GmbH
Publication of EP1585952A2 publication Critical patent/EP1585952A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G01M3/3227—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators for radiators
    • 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

Definitions

  • the invention relates to a method for leak testing of refrigeration machines, in particular air conditioning systems in motor vehicles, in which the system to be tested is pressurized with a gas under excess pressure, after a calming phase the excess pressure is measured and stored, after a time the excess pressure is measured again and stored and off the degree of tightness is derived from the difference between the stored values.
  • the change in the pressure difference between the gas pressure in the container to be tested and the reference container is then determined after the connection between the container to be tested and the gas source has been interrupted. Air is used as the gas.
  • the pressure difference is determined several times at intervals (DE 29 07 234 A1).
  • This method in particular does not allow air conditioning systems of motor vehicles, which have to be checked during the filling process of the motor vehicles, to be tested with sufficient accuracy. Only relatively large leaks can be detected with this method. In order to protect the environment and health, however, leaks must be identified which already allow a small amount of the refrigerant, in particular the R 134a refrigerant, to escape.
  • a test system is known in which the radiators are pressurized in a test or production system and then immediately transported on without waiting for the result of the pressure measurement.
  • the pressure sensor used for the pressure measurement remains connected to the radiator during further transport and is in turn connected to the stationary main part of the pressure measuring device by a flexible signal line.
  • the pressure measurement can only take place over a period of two to ten seconds. This means that only major leaks can be detected.
  • its measurement signals are transmitted wirelessly to the stationary main part of the pressure measurement device. The portable device required for this must be transported back to the starting point in a complex manner.
  • a large number of portable devices are required (DE 197 14 601 A1).
  • a method for leak testing of motor vehicle air conditioning systems in which a tight reference volume is subjected to the same pressure as the motor vehicle air conditioning system and in which the pressure differences between the motor vehicle air conditioning system and the reference volume are measured.
  • the process works with compressed air and uses a pressure of 10 to 20 bar.
  • the device for carrying out the method is designed as a portable device and is provided with a microprocessor, a rechargeable battery and a device for wireless data transmission.
  • the portable device is attached to a production line at a point on the motor vehicle that is being manufactured and is removed at another point after the measurement process has ended.
  • the measured values are transmitted wirelessly to a base station that controls the filling of the air conditioning system with refrigerant.
  • the portable device must be transported back to the starting point after removal from the tested motor vehicle (DE 197 37 869 A1). This procedure identifies all of the leaks the size of which has an impact on the environment and health. However, this requires a large number of portable devices, transmitting and receiving devices for the measured values and a complex feedback device for the portable devices at the starting point.
  • the motor vehicle to be manufactured is conveyed to the station of the second measurement through the production assembly line without devices which would interfere with further processing in the subsequent stations.
  • the adapters of the second measuring device are connected to the air conditioning system and the second measurement is carried out, and after it has ended, the air conditioning system is vented and separated from the adapters. Due to the respective separation from the adapters of the measuring devices, the time period is between two measurements variable and determined only by the position of the second measuring device. Since the values of both measuring devices are entered into the data network of the production assembly line and evaluated there for the subsequent filling process of the air conditioning system with refrigerant, no other transports are required apart from the data transfer. Apart from the two stationary measuring stations, no further measuring devices and wireless data transmission devices are required.
  • the invention is explained using an exemplary embodiment.
  • the drawing shows a schematic wiring diagram of an air conditioning system of a motor vehicle and a filling and measuring device.
  • the air conditioning system consists of a compressor 1, an evaporator 2, an expansion valve 3 and a condenser 4.
  • a self-closing filling valve 5 or 6 is connected to the circuit.
  • the filling and measuring device for the first measurement consists of two adapters 7 and 8 for the filling valves 5 and 6.
  • the feed lines to the adapters 7 and 8 are brought together to form a pressure line 9 which leads to the base station 10.
  • a shut-off valve 11 is connected in this pressure line 9.
  • a vent valve 12 is connected in the feed lines to the adapters 7 and 8.
  • Measuring probes of measuring devices 13 and 14 for pressure and temperature are arranged in the feed lines close to the adapters 7 and 8, the measuring value cables of which are led to the base station 10. No filling function is required for the second measurement, so that only one measuring device with a vent valve 12, as described above, is arranged there. Their measured value cables are led to a further base station 10.
  • the adapters 7 and 8 of the filling and measuring device are connected to the filling valves 5 and 6 of the air conditioning system. Then the shut-off valve 11 in the pressure line 9 is opened and the air conditioning system is filled with dried air up to the desired pressure via the high and low pressure sides. The shut-off valve 11 is then closed. After the pressure and temperature equalization, pressure and temperature are measured for the first time and stored together with the vehicle identification and the time via the base station 10 in the data network of the production assembly line. Now the adapters 7 and 8 of the filling and measuring device from the filling valves 5 and 6 Air conditioning solved.
  • the motor vehicle to be manufactured passes through a number of work stations in which various other assemblies are mounted on this motor vehicle.
  • a measuring station for a second measurement is provided on the production line.
  • the adapters 7 and 8 of the second measuring device are connected to the filling valves 5 and 6 of the air conditioning system.
  • pressure and temperature are measured a second time and, together with the vehicle identification and time, are stored in the data network of the production assembly line via the base station 10.
  • the leak rate in the data network is calculated from these values and a decision is made about filling with refrigerant or reworking the air conditioning system. After the measurements, the air conditioning system is vented.
  • the time period between the first and second measurement can be varied.
  • the target pressure will also have to be adapted to the pressure load capacity of the respective air conditioning system.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

L'invention concerne un procédé pour contrôler l'étanchéité d'installations de refroidissement, en particulier d'installations de climatisation dans des véhicules automobiles, ce procédé consistant à injecter un gaz en surpression dans l'installation à contrôler. L'objectif de l'invention est de perfectionner ce procédé de sorte qu'il permette de détecter toutes les fuites présentant un danger pour l'environnement et la santé tout en permettant de réduire les frais relatifs à sa mise en oeuvre. A cet effet, après une première mesure, les adaptateurs (7 ; 8) d'un dispositif de remplissage et de mesure sont déconnectés de l'installation de climatisation ; après une durée prolongée, les adaptateurs (7 ; 8) d'un second dispositif de mesure sont connectés à l'installation de climatisation et leurs valeurs de mesure sont comparées à celles de la première mesure ; l'installation de climatisation est ensuite purgée, puis elle est déconnectée des adaptateurs (7 ; 8) du second dispositif de mesure.
EP03779701A 2002-11-20 2003-11-18 Procede pour controler l'etancheite d'installations de climatisation dans des vehicules automobiles Withdrawn EP1585952A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10254120 2002-11-20
DE2002154120 DE10254120B3 (de) 2002-11-20 2002-11-20 Verfahren zur Dichtheitsprüfung von Klimaanlagen in Kraftfahrzeugen
PCT/DE2003/003812 WO2004046675A2 (fr) 2002-11-20 2003-11-18 Procede pour controler l'etancheite d'installations de climatisation dans des vehicules automobiles

Publications (1)

Publication Number Publication Date
EP1585952A2 true EP1585952A2 (fr) 2005-10-19

Family

ID=30010646

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03779701A Withdrawn EP1585952A2 (fr) 2002-11-20 2003-11-18 Procede pour controler l'etancheite d'installations de climatisation dans des vehicules automobiles

Country Status (3)

Country Link
EP (1) EP1585952A2 (fr)
DE (1) DE10254120B3 (fr)
WO (1) WO2004046675A2 (fr)

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DE102004013435A1 (de) * 2004-03-18 2005-10-06 Friedrich Boysen Gmbh & Co. Kg Verfahren und Vorrichtung zur Dichtheitsprüfung einer Abgasanlage
DE102004019929B4 (de) * 2004-04-21 2006-07-20 Siemens Ag Klimaanlage mit einer Vorrichtung zum Erfassen einer Gasleckage
DE102004028875A1 (de) * 2004-06-15 2006-01-05 Daimlerchrysler Ag Einrichtung zur Dichtheitsprüfung hohler Werkstücke
DE102006016557A1 (de) * 2006-04-07 2007-10-11 Air Liquide Deutschland Gmbh Kühlfahrzeug mit externem Kühlmodul und Kühlverfahren
DE102006016558A1 (de) * 2006-04-07 2007-10-11 Air Liquide Deutschland Gmbh Verfahren zum Überwachen der Gasdichtheit eines Kühlsystems eines Kühlfahrzeuges und zum Betreiben desselben sowie Kühlsystem für ein Kühlfahrzeug und Kühlfahrzeug
DE102006052551A1 (de) * 2006-11-06 2008-05-08 Vulkan Lokring-Rohrverbindungen Gmbh & Co. Kg Leckageprüfung bei einer Klimaanlage
CN101750226B (zh) * 2009-12-11 2011-01-26 北京航空航天大学 无相变制冷压缩机热工性能测试方法及测试装置
CN101852669B (zh) * 2010-05-18 2011-07-20 龙泉市创宇汽车空调有限公司 汽车空调储液干燥器检漏装置及其使用方法
DE102010033013A1 (de) 2010-07-31 2011-03-17 Daimler Ag Verfahren und Vorrichtung zur Dichtheitsprüfung von Betriebsstoffsystemen in Kraftfahrzeugen
DE102012001906B4 (de) * 2012-01-27 2014-06-12 Dürr Somac GmbH Verfahren zur Vermeidung und Erkennung von Kältemittelaustritten aus komplexen hydraulischen Systemen
WO2014180505A1 (fr) * 2013-05-08 2014-11-13 Arcelik Anonim Sirketi Appareil pour detecter une fuite dans un systeme de refroidissement et procede de detection de fuite
CN103499419B (zh) * 2013-09-26 2017-09-22 浙江吉利控股集团有限公司 插接器密封性能测试装置
CN104535268B (zh) * 2014-12-24 2017-07-07 广州精益汽车空调有限公司 一种空调防水密封性测试系统及测试方法

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US3538961A (en) * 1968-08-23 1970-11-10 Ralph E Bruce Refrigeration system servicing unit with dispensing pump and connector
DE2907234A1 (de) * 1979-02-23 1980-09-04 Mutti Werner H Verfahren zum feststellen von undichtigkeiten bei behaeltnissen und vorrichtung zur durchfuehrung dieses verfahrens
US4755957A (en) * 1986-03-27 1988-07-05 K-White Tools, Incorporated Automotive air-conditioning servicing system and method
JPH01109233A (ja) * 1987-10-21 1989-04-26 Hitachi Ltd 圧力測定装置
US5249434A (en) * 1992-07-06 1993-10-05 Wynn's Climate Systems, Inc. System and method for automatic charging of refrigeration systems
FR2735234B1 (fr) * 1995-06-08 1997-08-01 Soc Et Et Realisations Electro Procede et installation de controle de l'etancheite d'une enceinte
DE19714601A1 (de) * 1996-04-11 1997-11-06 Kermi Gmbh Heizkörper-Dichtigkeitsprüfanlage
DE19737869A1 (de) * 1997-08-29 1999-03-04 Sterling Fluid Sys Gmbh Verfahren und Vorrichtung zur Dichtigkeitsprüfung
US6205798B1 (en) * 1999-01-19 2001-03-27 Carrier Corporation Test for the automated detection of leaks between high and low pressure sides of a refrigeration system

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Title
See references of WO2004046675A3 *

Also Published As

Publication number Publication date
WO2004046675A3 (fr) 2005-06-30
DE10254120B3 (de) 2004-02-05
WO2004046675A2 (fr) 2004-06-03

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