USRE35370E - Leak detection in heating ventilating and air conditioning systems using an environmentally safe material - Google Patents
Leak detection in heating ventilating and air conditioning systems using an environmentally safe material Download PDFInfo
- Publication number
- USRE35370E USRE35370E US08/519,362 US51936295A USRE35370E US RE35370 E USRE35370 E US RE35370E US 51936295 A US51936295 A US 51936295A US RE35370 E USRE35370 E US RE35370E
- Authority
- US
- United States
- Prior art keywords
- refrigeration system
- lubricant
- grams
- mixture
- refrigerant
- 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.)
- Expired - Lifetime
Links
- 238000004378 air conditioning Methods 0.000 title claims description 8
- 238000010438 heat treatment Methods 0.000 title claims description 5
- 238000001514 detection method Methods 0.000 title abstract description 9
- 239000000463 material Substances 0.000 title description 10
- 238000005057 refrigeration Methods 0.000 claims abstract description 55
- 239000000975 dye Substances 0.000 claims abstract description 33
- 239000000203 mixture Substances 0.000 claims abstract description 33
- 239000003507 refrigerant Substances 0.000 claims abstract description 32
- XJHABGPPCLHLLV-UHFFFAOYSA-N benzo[de]isoquinoline-1,3-dione Chemical class C1=CC(C(=O)NC2=O)=C3C2=CC=CC3=C1 XJHABGPPCLHLLV-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 16
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 16
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 8
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000007850 fluorescent dye Substances 0.000 claims abstract description 8
- 239000001257 hydrogen Substances 0.000 claims abstract description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 8
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims abstract description 8
- -1 halogenated Chemical compound 0.000 claims abstract description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 5
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 4
- 239000001273 butane Substances 0.000 claims abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 4
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 4
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 4
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000001294 propane Substances 0.000 claims abstract description 4
- 239000000314 lubricant Substances 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 19
- 239000002480 mineral oil Substances 0.000 claims description 14
- 229920001515 polyalkylene glycol Polymers 0.000 claims description 11
- 150000004996 alkyl benzenes Chemical class 0.000 claims description 8
- 235000010446 mineral oil Nutrition 0.000 claims description 8
- 229920013639 polyalphaolefin Polymers 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 4
- 150000002148 esters Chemical class 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical class OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 125000002837 carbocyclic group Chemical group 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000007710 freezing Methods 0.000 claims description 2
- 230000008014 freezing Effects 0.000 claims description 2
- 125000000623 heterocyclic group Chemical group 0.000 claims description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 229920005862 polyol Polymers 0.000 claims 3
- 229920000728 polyester Polymers 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 230000000007 visual effect Effects 0.000 claims 1
- 150000002170 ethers Chemical class 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract 1
- 239000011551 heat transfer agent Substances 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 3
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 3
- 241000974482 Aricia saepiolus Species 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 2
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 2
- RWRIWBAIICGTTQ-UHFFFAOYSA-N difluoromethane Chemical compound FCF RWRIWBAIICGTTQ-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 1
- WXGNWUVNYMJENI-UHFFFAOYSA-N 1,1,2,2-tetrafluoroethane Chemical compound FC(F)C(F)F WXGNWUVNYMJENI-UHFFFAOYSA-N 0.000 description 1
- AHFMSNDOYCFEPH-UHFFFAOYSA-N 1,2-difluoroethane Chemical compound FCCF AHFMSNDOYCFEPH-UHFFFAOYSA-N 0.000 description 1
- BOUGCJDAQLKBQH-UHFFFAOYSA-N 1-chloro-1,2,2,2-tetrafluoroethane Chemical compound FC(Cl)C(F)(F)F BOUGCJDAQLKBQH-UHFFFAOYSA-N 0.000 description 1
- OHMHBGPWCHTMQE-UHFFFAOYSA-N 2,2-dichloro-1,1,1-trifluoroethane Chemical compound FC(F)(F)C(Cl)Cl OHMHBGPWCHTMQE-UHFFFAOYSA-N 0.000 description 1
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- GTLACDSXYULKMZ-UHFFFAOYSA-N pentafluoroethane Chemical compound FC(F)C(F)(F)F GTLACDSXYULKMZ-UHFFFAOYSA-N 0.000 description 1
- 238000010581 sealed tube method Methods 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
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
-
- 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
- G01M3/38—Investigating fluid-tightness of structures by using light
Definitions
- the present invention relates to leak detection in refrigeration systems, and more particularly to effective leak detection by the addition of a dye selected from the general chemical class of naphthalimide fluorescent dyes in a refrigeration system where said refrigeration system employs, in combination with a suitable refrigerant system lubricant, a material, suitable to function as a heat transfer agent or refrigerant in a hermetic system.
- Refrigerants that are devoid of the chlorine atom and therefore considered environmentally friendly to the earth's ozone layer have been developed and continue to be developed to replace CFC and HCFC materials that are the circulating heat transfer media in many hermetic systems.
- Many chemical companies have developed products that alone or in combination are suitable to function as heat transfer agents or refrigerants in a hermetic system such as, but not limited to, hydrochlorofluorocarons (HCFC), hydrofluorocarbons (HFC) and hydrogen, halogenated or ether derivatives of methane, hydrogen, halogenated, ether or cyclic derivatives of either ethane, propane, butane, pentane, mixtures of HCFC, HFC, hydrocarbons, carbon dioxide and ammonia.
- HCFC hydrochlorofluorocarons
- HFC hydrofluorocarbons
- halogenated or ether derivatives of methane hydrogen, halogenated, ether or cyclic derivatives of either ethan
- HCFC, HFC and hydrocarbon refrigerants are considered less damaging to the environment and have ozone depletion potentials which range from zero to a fraction of one, while the ozone depletion potential of a CFC refrigerant, such as CFC-12, is one.
- Hydrocarbons such as synthetic hydrocarbons (SHC), alkylbenzene (AB), and polyalphaolefins (PAO) may only be partially soluble in polyalkylene glycol and in polyolester lubricants such as those used in the new HFC refrigerant-containing systems.
- SHC synthetic hydrocarbons
- AB alkylbenzene
- PAO polyalphaolefins
- the materials found in the above-referenced patents have been found unsuitable in actual systems tests and laboratory analytical tests for long term use in hermetic systems such as refrigeration, heating, ventilating and air conditioning systems employing the alternative HFC refrigerants.
- the reason for the unsuitability of these perylene dyes in HFC systems is primarily due to thermal chemical instability.
- an improved leak detection composition that incorporates a dye selected from the general chemical class of naphthalimide dyes into a refrigeration system lubricant
- the refrigeration lubricant is suitable for use, alone or in combination with the dye, in refrigeration systems and includes, but is not limited to, hydrocarbons such as natural or refined mineral oils, synthetic hydrocarbons (SHC), alkylbenzenes (AB), polyalphaolefins (PAO) and synthetic polyalkylene glycols that are terminated as mono- or diethers or as esters, and the general class of polyolester lubricants that are either di-, tri-, tetra- or polyfunctional pentaerythritol esters.
- the new leak detection dyes from the general chemical naphthalimide dye class described herein have excellent thermal and oxidation stability up to 400° F., and may be left inside the hermetic system for the location of leaks on future occasions.
- the general class of naphthalimide dyes disclosed is particularly intended for use alone or in combination with any material suitable to function as a heat transfer agent or refrigerant in a hermetic system. In practice, the combination of refrigerant, lubricant and dye will be circulated throughout the entire hermetic refrigeration system and the system will then be inspected for leaks with a light excitation source having emission wavelengths in the range from 300 to 480 nanometers.
- the preferred composition disclosed herein is invisible or of a lessor intensity in ordinary light.
- a lamp having a light emission output in the range from 300 to 480 nanometers is directed at the lubricant and naphthalimide dye mixture, a striking fluorescence, for example with the color yellow to yellow green, is immediately noticeable at the leak site.
- the present invention is directed to the detection of leaks in refrigeration systems employing the new alternative HFC environmentally friendly refrigerants where said refrigeration system is suitable for cooling, freezing, heating, ventilating and air conditioning and where said refrigeration system employs alone or in combination, any material, suitable to function as a heat transfer agent or refrigerant in a hermetic system such as, but not limited to, chlorofluorocarbons (CFC), hydrochlorofluorocarbons (HCFC), hydrofluorocarbons (HFC) and any hydrogen, halogenated or ether derivatives of methane, hydrogen, halogenated, ether or cyclic derivatives of either ethane, propane, butane, pentane, mixtures of HCFC, HFC, hydrocarbons, carbon dioxide and ammonia.
- CFC chlorofluorocarbons
- HCFC hydrochlorofluorocarbons
- HFC hydrofluorocarbons
- refrigerants include but are not limited to CFC-11, CFC-12, HCFC-22, HCFC-123, HCFC-124, HCFC-142B, HFC-32, HFC-134, HFC-134A, HFC-152, HFC-152A, HFC-143A, HFC-125, HFC-245CA, HFC-245FA AND HFC-225CA.
- refrigeration systems can use alone or in combination, refrigeration system lubricants including, but not limited to, hydrocarbons such as natural or refined mineral oils, synthetic hydrocarbons (SHC), alkylbenzenes (AB), polyalphaolefins (PAO) and synthetic polyalkylene glycols that are terminated as mono- or diethers or as esters, and the general class of polyolester lubricants that are either di-, tri-, tetra- or polyfunctional pentaerythritol esters.
- hydrocarbons such as natural or refined mineral oils
- synthetic hydrocarbons (SHC) synthetic hydrocarbons (SHC), alkylbenzenes (AB), polyalphaolefins (PAO) and synthetic polyalkylene glycols that are terminated as mono- or diethers or as esters
- PAO polyalphaolefins
- synthetic polyalkylene glycols that are terminated as mono- or diethers or as esters
- the mixture of refrigerants and refrigeration system lubricants can be composed of the aforementioned materials having at least 0.001 grams of general naphthalimide dye structures that incorporate any nitrogen alkyl derivatives and any functionalized ring chemistry, both carbocyclic and heterocyclic, with either nitrogen, sulfur, carbon or oxygen dissolved per 100 grams of refrigeration working fluid.
- the dye concentrate is formulated in a predetermined manner that has optimum lubricant and dye compatibility at elevated temperatures and which does not alter the refrigerant lubricant viscosity, lubrication and system materials compatibility as determined by the sealed tube method.
- a mixture of 1.5 grams of any general naphthalimide dye structure was individually mixed with 1 ounce of either mineral oil, polyalkyelen glycol, and polyolester refrigeration lubricants. Approximately 1/4 ounce of each of these dye mixtures was added to three different automative air conditioning systems.
- the dye and mineral oil mixture was added to a CFC-containing system.
- the CFC system was then charged with CRC-12 and approximately 7 fluid ounces of mineral oil lubricant were added to the system.
- the system was then operated for 5 minutes to allow the dye mixture to mix with the mineral oil.
- the system was then scanned with a lamp having a light emission output in the range from 300 to 480 nanometers to check for leaks. A greenish-blue color was seen at a pinpoint leak on a black EPDM hose. This greenish-blue color indicated a leak in the CFC system.
- the dye and polyalkylene glycol mixture was added to the refrigeration system of a retrofitted automotive air conditioning system and the process of finding leaks was followed according to the above procedure. This time a green-yellow fluorescence was seen at the leak site after illumination with light.
- the dye and ester mixture was added to the refrigeration system of an automotive air conditioning system and the process of finding leaks was followed according to the above procedure. This time a green-yellow fluorescence was seen at the leak site after illumination with light.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lubricants (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Description
Claims (15)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/519,362 USRE35370E (en) | 1993-06-25 | 1995-08-25 | Leak detection in heating ventilating and air conditioning systems using an environmentally safe material |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/081,119 US5357782A (en) | 1993-06-25 | 1993-06-25 | Leak detection in heating, ventilating and air conditioning systems using an environmentally safe material |
US08/312,772 US5421192A (en) | 1993-06-25 | 1994-09-27 | Leak detection in heating, ventilating and air conditioning systems using an environmentally safe material |
US08/519,362 USRE35370E (en) | 1993-06-25 | 1995-08-25 | Leak detection in heating ventilating and air conditioning systems using an environmentally safe material |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/081,119 Continuation-In-Part US5357782A (en) | 1993-06-25 | 1993-06-25 | Leak detection in heating, ventilating and air conditioning systems using an environmentally safe material |
US08/312,772 Reissue US5421192A (en) | 1993-06-25 | 1994-09-27 | Leak detection in heating, ventilating and air conditioning systems using an environmentally safe material |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE35370E true USRE35370E (en) | 1996-11-05 |
Family
ID=46249837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/519,362 Expired - Lifetime USRE35370E (en) | 1993-06-25 | 1995-08-25 | Leak detection in heating ventilating and air conditioning systems using an environmentally safe material |
Country Status (1)
Country | Link |
---|---|
US (1) | USRE35370E (en) |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5858930A (en) * | 1997-05-30 | 1999-01-12 | United Color Manufacturing, Inc. | Liquid Benz-iso-Quinoline derivatives |
US5918269A (en) | 1998-02-18 | 1999-06-29 | Milliken & Company | Naphthalimide colorants with improved compatibility in refrigeration and air conditioning lubricants |
US5935272A (en) * | 1999-02-02 | 1999-08-10 | Milliken & Company | Compositions comprising aryloxypolyoxyalkylene naphthalimide derivative colorants |
US5998621A (en) | 1999-02-02 | 1999-12-07 | Milliken & Company | Aryloxy-poly(oxyalkylene) naphthalimide derivative colorants |
WO2000024843A1 (en) * | 1998-10-23 | 2000-05-04 | Alliedsignal Inc. | Leak-detecting refrigerant compositions containing oxazolyl-coumarin dyes |
EP1013738A1 (en) * | 1998-12-25 | 2000-06-28 | Sanden Corporation | Vapor compression type refrigeration cycle |
US6165384A (en) | 1997-08-27 | 2000-12-26 | Spectronics Corporation | Full spectrum fluorescent dye composition for the optimization of leak detection processes |
US6178809B1 (en) * | 1996-07-22 | 2001-01-30 | Bright Solutions, Inc. | Leak detection in heating, ventilating, refrigeration, and air conditioning systems utilizing adsorptive materials |
US6251302B1 (en) * | 1997-01-15 | 2001-06-26 | Microbiomed Corporation | Chemically substituted chromophores and fluorophores of high solubility and their use as fluid visualizing agents |
US6253810B1 (en) * | 1996-09-18 | 2001-07-03 | Uview Ultraviolet Systems, Inc. | Apparatus for detecting leaks in a pressurized air conditioning or refrigeration system |
US6293138B1 (en) | 1999-12-10 | 2001-09-25 | Visteon Global Technologies, Inc. | Apparatus and method for introducing leak detection dye into an air conditioning system |
US6345516B1 (en) | 2000-08-07 | 2002-02-12 | Multisorb Technologies, Inc. | Adsorbent unit with refrigerant tracer dye compartment |
US6469300B1 (en) | 2000-09-05 | 2002-10-22 | Uview Ultraviolet Systems, Inc. | Apparatus and method for injecting a concentrated fluorescent dye into a sealed air-conditioning system |
US20030044335A1 (en) * | 2000-01-03 | 2003-03-06 | Juzer Jangbarwala | Method and apparatus for metal removal ion exchange |
US6700735B2 (en) | 2001-07-27 | 2004-03-02 | International Business Machines Corporation | Disk drive lubricant reservoir systems and lubricants used therein |
US20050145822A1 (en) * | 2003-11-13 | 2005-07-07 | Drigotas Martin D. | Refrigerant compositions comprising UV fluorescent dye and solubilizing agent |
US6958876B2 (en) | 2001-07-27 | 2005-10-25 | Hitachi Global Storage Technologies Netherlands B.V. | Leak detection system of hard disk drives with lubricant reservoir |
US20060130495A1 (en) * | 2004-07-13 | 2006-06-22 | Dieckmann John T | System and method of refrigeration |
US7073346B2 (en) | 2002-03-21 | 2006-07-11 | Ritchie Engineering Company, Inc. | Compressor head, internal discriminator, external discriminator, manifold design for refrigerant recovery apparatus and vacuum sensor |
US7159412B2 (en) | 2002-03-21 | 2007-01-09 | Ritchie Engineering Company, Inc. | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus |
US20100058837A1 (en) * | 2008-09-05 | 2010-03-11 | Quest William J | Device having multiple light sources and methods of use |
US10151663B2 (en) | 2015-09-15 | 2018-12-11 | Emerson Climate Technologies, Inc. | Leak detector sensor systems using tag-sensitized refrigerants |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2096099A (en) * | 1935-08-16 | 1937-10-19 | Method of detecting leaks in | |
US3234045A (en) * | 1961-05-05 | 1966-02-08 | Chas J Webb Sons Co Inc | Method for protecting underground cable and determining leaks therein |
US3361547A (en) * | 1963-01-14 | 1968-01-02 | Joseph J. Packo | Detection of gas leaks |
US3572085A (en) * | 1968-12-18 | 1971-03-23 | Joseph J Packo | Method of detecting leaks in fluid-containing equipment |
US3770640A (en) * | 1971-11-22 | 1973-11-06 | Du Pont | Refrigerants colored for leak indication |
US4690689A (en) * | 1983-03-02 | 1987-09-01 | Columbia Gas System Service Corp. | Gas tracer composition and method |
US4758366A (en) * | 1985-02-25 | 1988-07-19 | Widger Chemical Corporation | Polyhalogenated hydrocarbon refrigerants and refrigerant oils colored with fluorescent dyes and method for their use as leak detectors |
US4938063A (en) * | 1988-09-13 | 1990-07-03 | Spectronics Corporation | Apparatus and method for infusing a material into a closed loop system |
US5149453A (en) * | 1985-02-25 | 1992-09-22 | H. B. Fuller Automotive Products, Inc. | Method for detecting leakage in a refrigeration system |
US5167867A (en) * | 1989-09-26 | 1992-12-01 | Exxon Production Research Company | Test-fluid composition and method for detecting leaks in pipelines and associated facilities |
US5279967A (en) * | 1992-01-24 | 1994-01-18 | Nalco Chemical Company | Fluorescent labeling of hydrocarbons for source identification |
-
1995
- 1995-08-25 US US08/519,362 patent/USRE35370E/en not_active Expired - Lifetime
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2096099A (en) * | 1935-08-16 | 1937-10-19 | Method of detecting leaks in | |
US3234045A (en) * | 1961-05-05 | 1966-02-08 | Chas J Webb Sons Co Inc | Method for protecting underground cable and determining leaks therein |
US3361547A (en) * | 1963-01-14 | 1968-01-02 | Joseph J. Packo | Detection of gas leaks |
US3572085A (en) * | 1968-12-18 | 1971-03-23 | Joseph J Packo | Method of detecting leaks in fluid-containing equipment |
US3770640A (en) * | 1971-11-22 | 1973-11-06 | Du Pont | Refrigerants colored for leak indication |
US4690689A (en) * | 1983-03-02 | 1987-09-01 | Columbia Gas System Service Corp. | Gas tracer composition and method |
US4758366A (en) * | 1985-02-25 | 1988-07-19 | Widger Chemical Corporation | Polyhalogenated hydrocarbon refrigerants and refrigerant oils colored with fluorescent dyes and method for their use as leak detectors |
US5149453A (en) * | 1985-02-25 | 1992-09-22 | H. B. Fuller Automotive Products, Inc. | Method for detecting leakage in a refrigeration system |
US4938063A (en) * | 1988-09-13 | 1990-07-03 | Spectronics Corporation | Apparatus and method for infusing a material into a closed loop system |
US5167867A (en) * | 1989-09-26 | 1992-12-01 | Exxon Production Research Company | Test-fluid composition and method for detecting leaks in pipelines and associated facilities |
US5279967A (en) * | 1992-01-24 | 1994-01-18 | Nalco Chemical Company | Fluorescent labeling of hydrocarbons for source identification |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6178809B1 (en) * | 1996-07-22 | 2001-01-30 | Bright Solutions, Inc. | Leak detection in heating, ventilating, refrigeration, and air conditioning systems utilizing adsorptive materials |
US6253810B1 (en) * | 1996-09-18 | 2001-07-03 | Uview Ultraviolet Systems, Inc. | Apparatus for detecting leaks in a pressurized air conditioning or refrigeration system |
US6251302B1 (en) * | 1997-01-15 | 2001-06-26 | Microbiomed Corporation | Chemically substituted chromophores and fluorophores of high solubility and their use as fluid visualizing agents |
US5858930A (en) * | 1997-05-30 | 1999-01-12 | United Color Manufacturing, Inc. | Liquid Benz-iso-Quinoline derivatives |
US6165384A (en) | 1997-08-27 | 2000-12-26 | Spectronics Corporation | Full spectrum fluorescent dye composition for the optimization of leak detection processes |
US5918269A (en) | 1998-02-18 | 1999-06-29 | Milliken & Company | Naphthalimide colorants with improved compatibility in refrigeration and air conditioning lubricants |
WO2000024843A1 (en) * | 1998-10-23 | 2000-05-04 | Alliedsignal Inc. | Leak-detecting refrigerant compositions containing oxazolyl-coumarin dyes |
US6132636A (en) | 1998-10-23 | 2000-10-17 | Allied Signal Inc | Leak-detecting refrigerant compositions containing oxazolyl-coumarin dyes |
EP1013738A1 (en) * | 1998-12-25 | 2000-06-28 | Sanden Corporation | Vapor compression type refrigeration cycle |
US5935272A (en) * | 1999-02-02 | 1999-08-10 | Milliken & Company | Compositions comprising aryloxypolyoxyalkylene naphthalimide derivative colorants |
US5998621A (en) | 1999-02-02 | 1999-12-07 | Milliken & Company | Aryloxy-poly(oxyalkylene) naphthalimide derivative colorants |
US6293138B1 (en) | 1999-12-10 | 2001-09-25 | Visteon Global Technologies, Inc. | Apparatus and method for introducing leak detection dye into an air conditioning system |
US20030044335A1 (en) * | 2000-01-03 | 2003-03-06 | Juzer Jangbarwala | Method and apparatus for metal removal ion exchange |
US7048857B2 (en) * | 2000-01-03 | 2006-05-23 | The Boc Group, Inc. | Method and apparatus for metal removal ion exchange |
US6345516B1 (en) | 2000-08-07 | 2002-02-12 | Multisorb Technologies, Inc. | Adsorbent unit with refrigerant tracer dye compartment |
US6469300B1 (en) | 2000-09-05 | 2002-10-22 | Uview Ultraviolet Systems, Inc. | Apparatus and method for injecting a concentrated fluorescent dye into a sealed air-conditioning system |
US6700735B2 (en) | 2001-07-27 | 2004-03-02 | International Business Machines Corporation | Disk drive lubricant reservoir systems and lubricants used therein |
US6958876B2 (en) | 2001-07-27 | 2005-10-25 | Hitachi Global Storage Technologies Netherlands B.V. | Leak detection system of hard disk drives with lubricant reservoir |
US7428822B2 (en) | 2002-03-21 | 2008-09-30 | Ritchie Engineering Company, Inc. | Vacuum sensor |
US7310965B2 (en) | 2002-03-21 | 2007-12-25 | Ritchie Engineering Company, Inc. | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus |
US7073346B2 (en) | 2002-03-21 | 2006-07-11 | Ritchie Engineering Company, Inc. | Compressor head, internal discriminator, external discriminator, manifold design for refrigerant recovery apparatus and vacuum sensor |
US7159412B2 (en) | 2002-03-21 | 2007-01-09 | Ritchie Engineering Company, Inc. | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus |
US20070138433A1 (en) * | 2003-11-13 | 2007-06-21 | Drigotas Martin D | Refrigerant compositions comprising UV fluorescent dye and solubilizing agent |
US20050145822A1 (en) * | 2003-11-13 | 2005-07-07 | Drigotas Martin D. | Refrigerant compositions comprising UV fluorescent dye and solubilizing agent |
US20060130495A1 (en) * | 2004-07-13 | 2006-06-22 | Dieckmann John T | System and method of refrigeration |
US7861541B2 (en) | 2004-07-13 | 2011-01-04 | Tiax Llc | System and method of refrigeration |
US20100058837A1 (en) * | 2008-09-05 | 2010-03-11 | Quest William J | Device having multiple light sources and methods of use |
US10151663B2 (en) | 2015-09-15 | 2018-12-11 | Emerson Climate Technologies, Inc. | Leak detector sensor systems using tag-sensitized refrigerants |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5421192A (en) | Leak detection in heating, ventilating and air conditioning systems using an environmentally safe material | |
USRE35370E (en) | Leak detection in heating ventilating and air conditioning systems using an environmentally safe material | |
US5357782A (en) | Leak detection in heating, ventilating and air conditioning systems using an environmentally safe material | |
AU2018389981B2 (en) | Composition containing refrigerant, use of said composition, refrigerator having said composition, and method for operating said refrigerator | |
CA1331507C (en) | Polyhalogenated hydrocarbon refrigerants and refrigerant oils colored with fluorescent dyes and method for their use as leak detectors | |
US6132636A (en) | Leak-detecting refrigerant compositions containing oxazolyl-coumarin dyes | |
ES2829325T3 (en) | Compositions comprising 1,1,1,4,4,4-hexafluoro-2-butene and uses thereof | |
AU2009316668B2 (en) | Tetrafluoropropene compositions and uses thereof | |
US20070138433A1 (en) | Refrigerant compositions comprising UV fluorescent dye and solubilizing agent | |
CN101370900A (en) | Refrigerant additive compositions containing perfluoropolyethers | |
CN105219350A (en) | Comprise the composition of fluoroolefins | |
CN101297016A (en) | Compositions comprising a fluoroolefin | |
AU2010339656A1 (en) | Compositions comprising tetrafluoropropene and difluoromethane and uses thereof | |
CN103254875A (en) | Compositions comprising a fluoroolefin | |
CN101346450A (en) | Compositions comprising fluoroolefins and uses thereof | |
US20250066653A1 (en) | Fluoroolefin compositions containing a dye and methods for their production, storage and usage | |
CA2346940A1 (en) | Composition and method for detecting leaks in hermetic refrigerant systems | |
BRPI0719465B1 (en) | "compositions, cooling and heat production processes, cooling system recharge method and heat exchange system" | |
CN1878850A (en) | Refrigerant compositions comprising UV fluorescent dye and solubilizing agent | |
CN102119313A (en) | Lubricants for air donditioning systems | |
US20040262567A1 (en) | Stable compositions of liquefied refrigerant and UV dye | |
AU719551B3 (en) | Improved refrigerant and leak detection composition | |
WO2005047843A1 (en) | Method and system for leak detection | |
AU729317B2 (en) | Composition and method for detecting leaks in hermetic refrigerant systems | |
AU2015202652B2 (en) | Compositions comprising fluoroolefins and uses thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
FEPP | Fee payment procedure |
Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 12 |
|
RR | Request for reexamination filed |
Effective date: 20070507 |
|
B1 | Reexamination certificate first reexamination |
Free format text: THE PATENTABILITY OF CLAIMS 1, 3, 5-12 AND 14-15 IS CONFIRMED. CLAIMS 2, 4 AND 13 ARE DETERMINED TO BE PATENTABLE AS AMENDED. NEW CLAIMS 16-46 ARE ADDED AND DETERMINED TO BE PATENTABLE. |