DE102014200161A1 - A method of detecting a leak in an air conditioning circuit - Google Patents
A method of detecting a leak in an air conditioning circuit Download PDFInfo
- Publication number
- DE102014200161A1 DE102014200161A1 DE102014200161.7A DE102014200161A DE102014200161A1 DE 102014200161 A1 DE102014200161 A1 DE 102014200161A1 DE 102014200161 A DE102014200161 A DE 102014200161A DE 102014200161 A1 DE102014200161 A1 DE 102014200161A1
- Authority
- DE
- Germany
- Prior art keywords
- substance
- conditioning circuit
- leak
- sensor
- air conditioning
- 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.)
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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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/226—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
- G01M3/228—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators for radiators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00978—Control systems or circuits characterised by failure of detection or safety means; Diagnostic methods
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- 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
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
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- 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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
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- 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
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- 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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Verfahren zum Detektieren eines Lecks in einem Klimaanlagenkreislauf, in dem ein Gemisch strömt, welches eine erste, primär oder ausschließlich als Kältemittel fungierende Substanz, insbesondere Kohlendioxid, und eine zweite Substanz enthält, wobei im Falle eines Lecks in dem Klimaanlagenkreislauf mittels eines an eine Auswerteelektronik angeschlossenen Sensors detektiert wird, ob im Bereich des Sensors zweite Substanz vorhanden ist, wobei im Falle des Vorhandenseins zweiter Substanz darauf geschlossen wird, dass der Klimaanlagenkreislauf ein Leck aufweist.A method for detecting a leak in an air-conditioning circuit, in which a mixture flows, which contains a first, primarily or exclusively acting as a refrigerant substance, in particular carbon dioxide, and a second substance, wherein in the case of a leak in the air conditioning circuit by means of a connected to a transmitter Sensor is detected whether second substance is present in the region of the sensor, wherein in the case of the presence of second substance is concluded that the air conditioning circuit has a leak.
Description
Ein derartiges Verfahren ist aus der
Bekanntlich ist der menschliche Geruchssinn nicht bei allen Menschen gleich gut entwickelt. Somit besteht die Möglichkeit, dass ein Leck im Klimaanlagenkreislauf mittels des menschlichen Geruchssinns nicht zuverlässig festgestellt werden kann. Selbst wenn Fahrzeuginsassen im Falle eines Lecks den Geruchsstoff bemerken, müssten „die richtigen Schlüsse” daraus gezogen und Abhilfemaßnahmen ergriffen werden, z. B. durch Öffnen eines Fahrgastraumfensters. Nicht auszuschließen ist das Risiko, dass zwar der Geruchsstoff festgestellt, aber „fälschlich” interpretiert wird. So wäre denkbar, dass ein Fahrgast in der Annahme, der Geruchsstoff sei von der Umgebung in das Fahrzeug eingeströmt, Fenster und/oder Luftklappen der Lüftungsanlage schließt bzw. die Lüftungsanlage auf Umluftbetrieb schaltet, was dann zu einer unzulässig hohen Kältemittelkonzentration im Fahrgastraum führen könnte.As we know, the human sense of smell is not equally well developed in all humans. Thus, there is a possibility that a leak in the air conditioning circuit can not be reliably detected by the human sense of smell. Even if vehicle occupants notice the odorant in the event of a leak, "the right conclusions" must be drawn from this and remedial action taken, eg. B. by opening a passenger compartment window. It can not be ruled out that the smell may indeed be detected, but interpreted as "falsely". Thus, it would be conceivable that a passenger, assuming the odorant has flowed into the vehicle from the environment, closes windows and / or louvers of the ventilation system or switches the ventilation system to recirculation mode, which could then lead to an inadmissibly high refrigerant concentration in the passenger compartment.
Aufgabe der Erfindung ist es, ein Verfahren anzugeben, mittels dem mit höherer Zuverlässigkeit ein Leck in einem Klimaanlagenkreislauf detektiert werden kann.The object of the invention is to provide a method by means of which a leak in an air conditioning circuit can be detected with greater reliability.
Diese Aufgabe wird durch die Merkmale des Patentanspruches 1 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind den Unteransprüchen zu entnehmen.This object is solved by the features of claim 1. Advantageous embodiments and further developments of the invention can be found in the dependent claims.
Ausgangspunkt der Erfindung ist ein Verfahren zum Detektieren eines Lecks in einem Klimaanlagenkreislauf, in welchem ein Gemisch strömt, welches eine erste, primär oder ausschließlich als Kältemittel fungierende Substanz wie z. B. Kohlendioxid, und eine zweite Substanz enthält. Die Erfindung ist insbesondere für Klimaanlagen geeignet, bei denen als Kältemittel Kohlendioxid verwendet wird, da Kohlendioxid geruchslos ist und somit über ein Leck austretendes Kohlendioxid mit dem menschlichen Geruchssinn nicht erkannt werden kann.The starting point of the invention is a method for detecting a leak in an air-conditioning circuit in which a mixture flows, which is a first, primary or exclusively acting as a refrigerant substance such. As carbon dioxide, and a second substance. The invention is particularly suitable for air conditioning systems in which carbon dioxide is used as the refrigerant, since carbon dioxide is odorless and thus leakage of carbon dioxide can not be detected by the human olfactory sense.
Der Kern der Erfindung besteht darin, dass im Falle eines Lecks in dem Klimaanlagenkreislauf mittels eines an eine Auswerteelektronik angeschlossenen Sensors detektiert wird, ob im Bereich des Sensors zweite Substanz vorhanden ist, wobei im Falle des Vorhandenseins zweiter Substanz im Bereich des Sensors daraus geschlossen wird, dass der Klimaanlagenkreislauf ein Leck aufweist.The essence of the invention is that, in the event of a leak in the air-conditioning circuit, it is detected by means of a sensor connected to an evaluation unit whether second substance is present in the region of the sensor, and if second substance is present in the region of the sensor, that the air conditioning circuit has a leak.
Im Unterschied zu der eingangs genannten
Nach einer Weiterbildung der Erfindung wird im Falle des Vorhandenseins zweiter Substanz im Bereich des Sensors ein Warnsignal erzeugt und/oder ein Steuersignal zur Ansteuerung einer Komponente, durch deren Ansteuerung die Konzentration des Kältemittels und zweiter Substanz verringert wird.According to a development of the invention, in the case of the presence of second substance in the region of the sensor, a warning signal is generated and / or a control signal for controlling a component, by the activation of which the concentration of the refrigerant and second substance is reduced.
Die Erfindung ist insbesondere für Fahrzeugklimaanlagen geeignet. Wird mittels des Sensors zweite Substanz im Fahrgastraum detektiert, so kann bspw. über eine im Bereich der Instrumententafel angeordnete Anzeigeeinrichtung optisch und/oder akustisch und/oder haptisch ein Warnsignal erzeugt werden. Alternativ oder ergänzend dazu könnte die aktuelle Förderleistung der Lüftungsanlage des Fahrzeugs erhöht werden (insbesondere, wenn noch nicht in anderer Weise, z. B. durch Öffnen eines Fahrgastraumfensters, für zusätzlich Belüftung gesorgt worden ist), um einen möglichst schnellen Abtransport des über das Leck ausgetretenen Gemischs aus dem Fahrgastraum sicherzustellen. Alternativ oder ergänzend dazu könnte die Elektronik auch ein oder mehrere Fenster und/oder ein Schiebedach des Fahrzeugs öffnen und auf diese Weise für einen möglichst schnellen Abtransport des Gemischs aus dem Fahrgastraum sorgen.The invention is particularly suitable for vehicle air conditioning systems. If second substance in the passenger compartment is detected by means of the sensor, then a warning signal can be generated optically and / or acoustically and / or haptically via a display device arranged in the region of the instrument panel. Alternatively or additionally, the current delivery rate of the ventilation system of the vehicle could be increased (in particular, if not yet provided in another way, for example by opening a passenger compartment window, for additional ventilation) to the fastest possible removal of the over the leak ensure that the mixture escapes from the passenger compartment. Alternatively or additionally, the electronics could also open one or more windows and / or a sunroof of the vehicle and in this way ensure the fastest possible removal of the mixture from the passenger compartment.
Nach einer Weiterbildung der Erfindung ist vorgesehen, dass die zweite Substanz der Umgebungstemperatur und Umgebungsluftdruck gasförmig ist.According to a development of the invention, it is provided that the second substance of the ambient temperature and ambient air pressure is gaseous.
Nach einer Weiterbildung der Erfindung ist vorgesehen, dass die bei einem Leck in dem Klimaanlagenkreislauf im Bereich des Sensors auftretende Maximalkonzentration zweiter Substanz so gering ist, dass das Vorhandensein zweiter Substanz mit dem menschlichen Geruchssinn nicht erfassbar ist. Insbesondere kann vorgesehen sein, dass die zweite Substanz geruchslos ist, d. h. dass sie mit dem menschlichen Geruchssinn überhaupt nicht erfassbar ist.According to a development of the invention, it is provided that the maximum concentration of second substance occurring in the air conditioning circuit in the region of the sensor is so small that the presence of second substance with the human sense of smell is not detectable. In particular, it can be provided that the second substance is odorless, d. H. that it is not detectable with the human sense of smell.
Wie bereits erwähnt, fungiert die zweite Substanz primär oder ausschließlich als „Leckindikationssubstanz”. Sie braucht also keinen nennenswerten Beitrag im Sinne eines Wärmeübertragungsmediums leisten. Dementsprechend kann vorgesehen sein, dass die spezifische Wärmekapazität der zweiten Substanz bei gegebenen Umgebungsbedingungen (Temperatur, Druck) kleiner als die der als Kältemittel fungierenden ersten Substanz ist.As already mentioned, the second substance acts primarily or exclusively as a "leak indication substance". So it does not make any significant contribution in terms of a heat transfer medium. Accordingly, it can be provided that the specific heat capacity of the second substance under given ambient conditions (temperature, pressure) is smaller than that of the first substance acting as refrigerant.
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102006002378 A1 [0001] DE 102006002378 A1 [0001]
- DE 102007057262 A1 [0001, 0001, 0007] DE 102007057262 A1 [0001, 0001, 0007]
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014200161.7A DE102014200161A1 (en) | 2014-01-09 | 2014-01-09 | A method of detecting a leak in an air conditioning circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102014200161.7A DE102014200161A1 (en) | 2014-01-09 | 2014-01-09 | A method of detecting a leak in an air conditioning circuit |
Publications (1)
Publication Number | Publication Date |
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DE102014200161A1 true DE102014200161A1 (en) | 2015-07-09 |
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ID=53443312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE102014200161.7A Withdrawn DE102014200161A1 (en) | 2014-01-09 | 2014-01-09 | A method of detecting a leak in an air conditioning circuit |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005049759A1 (en) * | 2003-11-13 | 2005-06-02 | E.I. Dupont De Nemours And Company | Detectable refrigerant compositions and uses thereof |
DE102005055756A1 (en) * | 2005-11-21 | 2007-05-24 | Siemens Ag | Device for air conditioning |
DE102006002378A1 (en) | 2006-01-17 | 2007-07-19 | Bayerische Motoren Werke Ag | Vehicle air conditioning system comprises a carbon dioxide coolant circuit, where an odorant is added to the coolant and is detectable by the human sense of smell |
DE102006053231A1 (en) * | 2006-11-11 | 2008-05-15 | GM Global Technology Operations, Inc., Detroit | Refrigeration system with CO2 as refrigerant |
DE102007057262A1 (en) | 2007-11-26 | 2009-05-28 | Volkswagen Ag | Refrigerant for air conditioning units, especially for cars, comprises a base substance for heat transfer and a strong-smelling substance to provide warning of leaks in the system |
-
2014
- 2014-01-09 DE DE102014200161.7A patent/DE102014200161A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005049759A1 (en) * | 2003-11-13 | 2005-06-02 | E.I. Dupont De Nemours And Company | Detectable refrigerant compositions and uses thereof |
DE102005055756A1 (en) * | 2005-11-21 | 2007-05-24 | Siemens Ag | Device for air conditioning |
DE102006002378A1 (en) | 2006-01-17 | 2007-07-19 | Bayerische Motoren Werke Ag | Vehicle air conditioning system comprises a carbon dioxide coolant circuit, where an odorant is added to the coolant and is detectable by the human sense of smell |
DE102006053231A1 (en) * | 2006-11-11 | 2008-05-15 | GM Global Technology Operations, Inc., Detroit | Refrigeration system with CO2 as refrigerant |
DE102007057262A1 (en) | 2007-11-26 | 2009-05-28 | Volkswagen Ag | Refrigerant for air conditioning units, especially for cars, comprises a base substance for heat transfer and a strong-smelling substance to provide warning of leaks in the system |
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R005 | Application deemed withdrawn due to failure to request examination |