US3175342A - Filter dryer unit for cleaning sealed refrigerating systems after motor burn outs - Google Patents

Filter dryer unit for cleaning sealed refrigerating systems after motor burn outs Download PDF

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US3175342A
US3175342A US251804A US25180463A US3175342A US 3175342 A US3175342 A US 3175342A US 251804 A US251804 A US 251804A US 25180463 A US25180463 A US 25180463A US 3175342 A US3175342 A US 3175342A
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filter
dryer
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casing
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Balogh Stephen
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Parker Hannifin Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2400/00General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04Refrigeration circuit bypassing means
    • F25B2400/0413Refrigeration circuit bypassing means for the filter or drier

Description

March 30, 1965 5, BALOGH 3,175,342

FILTER DRYER UNIT FOR CLEANING SEALED REFRIGERATING 2 Sheets-Sheet 1 SYSTEMS AFTER MOTOR BURN OUTS Filed Jan. 16, 1963 INVENTOR STEPHEN BALOGH March 30, 1965 s. BALOGH 3,175,342

FILTER DRYER UNIT FOR CLEANING SEALED REFRIGERATING SYSTEMS AFTER MOTOR BURN OUTS Filed Jan. 16, 1963 2 Sheets-Sheet 2 I0 P, m

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GO D 0 O O O INVENTOR l STEPHEN BALOGH United States Patent 3,175,342 FlLTER DRYER UNIT FUR CLEANKNG SEALED REFRIGERATING SYSTEMS AFTER MOTOR B OUTS Stephen Balogh, Lyons, N.Y., assignor, by mesne assignments, to Parker-Hannifin Corporation, Cleveland, ()hio, a corporation of Ohio Filed Jan. 16, 1963, Ser. No. 251,804

4 Claims. (Cl. 55-316) This invention relates to a method, apparatus and filter dryer unit for cleaning sealed refrigerating systems after motor burn outs.

Generally there is provided a relatively large combined filter, dryer and acid remover adapted for temporary insertion into the suction line of a refrigerating systern. The general construction of the filter and dryer unit is similar to that of the permanently installed unit disclosed in applicants prior application entitled Ceramic Block Filter Dryer, Serial No. 214,663, jointly filed by applicant and Ronald M. Wilber on August 3, 1962.

The filter, dryer and acid absorber unit comprises an elongated cylindrical shell the outlet end of which is filled by a filter block molded of ceramic material and closed at-one end by an integral wall. The cavity in the block is bridged by a fine meshed screen supported on a perforated plate. Most of the remaining space within the shell is filled with loose type desiccants and acid absorbers, such as molecular sieve, activated alumina and silica gel, gently compressed axially within the shell by a pair of annular elements transversely bridged by fine meshed strainers.

When the motor of a sealed motor and compressor unit has burned out, the same is replaced along with the usual permanently installed filter and dryer unit, after the system has first been drained and flushed. A clean up filter and dryer unit is then installed in the suction line immediately before the compressor. Next, the sys tern is charged with refrigerant and operated under (nearly) normal conditions for at least three days. The clean up unit is then removed and a bypassing jumper is substituted therefor in the now fully renovated system.

Cleaning up of a refrigeration or air conditioning system after a motor burn out is one of the most ditficult jobs for the service man. There are various methods used in cleaning a system recommended by refrigerant manufacturers which are excellent if carried out properly, but there is too much left to guess work on the service mans part. The use of a refrigerant to flush out a system usually removes only those large particles of residue which are relatively free in the lines. A major portion of the residue left in the system usually is composed of tiny particles of sludges, etc., which cling to the tubing surfaces and are removed only after a longer period, usually of 48 hours duration under actual operating conditions.

It is accordingly an object of the present invention to provide a combined filter, dryer and acid absorber unit especially designed for temporary installation in a refrigeration system for cleaning the same after a motor burn out.

It is another object of the invention to provide such a unit which is of simple, inexpensive yet highly effective design.

It is a further object of the invention to provide a novel and highly etlicient method for renovating a refrigeration system after a motor burn out.

It is yet another object of this invention to provide a simple means for facilitating the insertion and removal of the herein disclosed unit from a refrigeration system.

Other and further objects of the invention will become 3,175,342 Patented Mar. 30, 1965' apparent from a reading of the following specification taken in conjunction with the drawings, in which:

FIGURE 1 is a plan view, partly in axial section, of a preferred embodiment of the combined filter, dryer and acid absorber unit,

FIGURE 2 is a plan view, partly in axial section, of a modified form of unit,

FIGURE 3 is a schematic diagram of a system utilizing one of the units during renovation of the system, and

FIGURE 4 is a fragmentary schematic diagram showing a modified form of the unit coupling portion of the system.

With reference now to FIGURE 1 of the drawings, the numeral It generally designates a preferred embodiment of a unit according to the present invention. The unit ltl comprises a cylindrical case formed of a pair of axially aligned cup shaped metallic shells 11 and 12., the abutted rims of which are herein disclosed as being joined and hermetically sealed by a close fitting band 13 welded or soldered thereto. However, the case 1142 can be formed in numerous other manners and the parts joined after the filtering and renovating parts and materials are placed therein. The case Til-l2 may have a length of approximately seven inches and a diameter of about an inch and a half for use with refrigerating systems of from two to five tons capacity.

The ends of the shells 11 and 12 are provided with tubular coupler sleeves 1 soldered, brazed or welded coaxially thereto. The shell 11 constitutes the intake portion of the unit it) and is substantially filled with granular or other loose desiccant and acid absorbing and/or neutralizing material or materials, such as molecular sieve, activated alumina and/ or silica gel. The desiccant material, designated 15, is loosely compressed and held between a screen assembly 16 and a cup shaped perforated bafile 17 the flanged rims of which are press fitted into the shell 11.

The screen assembly 16 has a double folded marginal flange, the folds of which embrace and firmly anchor a marginal flange on a disc strainer 18 formed of mesh Monel Woven screen.

The outlet end of the shell 12 is bridged by another perforated cup shaped battle 19 against the downstream side of which a mesh Monel Woven screen 2b i held by the inturned flange of an annular element 21.

A conically tapered filter block 22 of porous porcelain has its larger end snugly seated in the cup shaped baffle 19. A compressed coil spring 23 maintains desired positions of and spacing between parts 17 and 22. The filter block 22 has a cavity 24 in one end to increase the filter area, and a depression 25 in its other end for the same purpose and also for providing a centering seat for the apex of the conically coiled spring 23.

The unit of FIG. 2 is generally designated 26 and comprises a pair of aligned cup-shaped shells 27 and 28 joined by a band 29. The unit 26 has a length of about twelve inches and a diameter of the order of two inches, being designed for use with systems of from five to ten tons capacity.

Granular desiccant 36 is loosely held in the shell 27 between two strainer discs 31 of 100 mesh Monel woven screen, the marginal flanges of which are clamped between the double folded marginal flanges of a pair of annular elements 32. The shell 2% has press fitted therein an annular element 33 and a perforated cup shaped baffle 34, between which is clamped and held a strainer disc 35 of 150 mesh woven Monel screen.

A conically tapered porous porcelain filter block 36 is coaxially held in the cup shaped bafile 34 by a coil spring 37 compressed between the screen assembly 31-32 and a coarse screen support disc 38. The filter core block 36 is 3 similar in shape and function to the block 22 of FF- URE 1. The shells 27 and 28 have couplers 39 similar to couplers 14 of the first described species.

FIGURE 3 is a schematic diagram of a typical refrigeration system showing one arrangement for installing and removing a renovating unit according to the present invention. The numeral 40 designates the renovating unit which is inserted in a suction or low pressure line 41 connecting an evaporator 42 to a replaced combined motor and compressor unit 43. A conventional new permanently installed filter and dryer unit 44 is shown in a high pressure line 45 between the compressor 43 and a conventional condenser 45. An expansion valve 47 completes the basic refrigeration system. When the system has been cleaned (after several days of near normal operation) the unit 40 is removed and the gap in the line 41 thus formed is closed in known manner by a jumper tube 48.

In the modified installation arrangement of FIG- URE 4, a renovating unit 49 is inserted in a low pressure line 50, and a pair of manual valves 51 in said line at each end of the unit 49 is provided to isolate or to permit removal of the unit 49. A bypass branch line 52 bridges the unit 49 and its isolating valves 51, as shown, joining the line 50 at Te 53. The bypass line 52 has a valve 54 which is manually closed during the renovating period.

The herein disclosed method of renovating a refrigeration system after a motor burn out comprises the following steps:

(1) Discharge the system refrigerant to outside ambient in the liquid phase, avoiding bodily contact with refrigerant or oil, as acid burns can result from contact with sludge from burned out compressor.

(2) Remove defective compressor.

(3) Remove and discard the old high side dryer and/ or filter.

(4) Clean the expansion valve strainer and the internal expansion valve parts. Connect system Without expansion valve in system.

(5 Flush the system with new refrigerant.

(6) Reinstall cleaned expansion valve.

(7) Install liquid line dryer, using one size larger than normal selection size.

(8) Install new compressor.

(9) Install motor burn out clean up dryer in suction lines.

(10) Evacuate the entire system with a good vacuum pump.

(11) Break the vacuum with refrigerant; re-evacuate and charge the system.

(12) After at least three days, change the liquid line dryer and remove and discard the motor burn out clean up dryer. Advise the customer that reduced performance can be expected during the three day clean up period as the motor burn out dryer will introduce a pressure drop in the suction line while it is doing its work.

(13) Use jumper tube to replace void space (or turn valves of bypass system).

(14) Resume operation of the system as a completely renovated system.

For example, the case 11-12 could be of one piece construction spun on both ends after filling. Also the filter block could be a core molded of molecular sieve to absorb the water and acids that may pass through the silica gel bed. The molecular sieve is preferably but not necessarily synthetic zeolite.

What is claimed is: v

1. A combined filter, dryer and acid absorbed unit, comprising: an elongated tubular casing having inlet and outlet fixtures adjacent opposite ends thereof, a porous filter block spanning said casing adjacent one end thereof, a mass of loose fill moisture and acid absorbing material in the other end of said casing, apair of perforate disc members engaging opposite ends of said mass of material to prevent axial displacement of said material by axial flow of refrigerant through said unit, and a coil spring compressed between an end of said filter block and the adjacent disc member.

2. Structure according to claim 1, said filter block having a relatively shallow axial depression constituting a locating seat for one end of said coil spring.

3. A combined filter, dryer and acid absorber unit, comprising: an elongated tubular casing having inlet and outlet fixtures adjacent opposite ends thereof, a porous filter block spanning said casing adjacent one end thereof, a mass of loose fill moisture and acid absorbing material in the other end of said casing, a pair of perforate disc members engaging opposite ends of said mass of material to prevent axial displacement of said material by axial fiow of refrigerant through said unit, a supporting and centering disc for said filter block having a convex central portion, said filter block having a depression matingly receiving said convex central portion, and a coil spring compressed between said last mentioned disc and an adjacent disc member for urging the latter member and said filter block toward opposite ends of said casing.

4. A combined filter, dryer and acid absorber unit, comprising: an elongated tubular casing having inlet and outlet fixtures adjacent opposite ends thereof, a porous filter block spanning said casing adjacent one end thereof, a mass of loose fill moisture and acid absorbing material in the other end of said casing, a pair of perforate disc members engaging opposite ends of said mass of material to prevent axial displacement of said material by axial flow of refrigerant through said unit, said porous filter block being molded of molecular sieve, and said loose fill material being primarily silica gel.

References Cited in the file of this patent UNITED STATES PATENTS 2,283,989 Henry May 26, 1942 2,325,657 Burkness Aug. 3, 1943 2,341,430 Elsey Feb. 8, 1944 2,600,435 Shapiro June 17, 1952 2,705,405 Uhlman Apr. 5, 1955 2,873,856 Jones Feb. 17, 1959 FOREIGN PATENTS 603,135 Canada Aug. 9, 1960 OTHER REFERENCES Modern Refrigeration and Air Conditioning, Althouse et 211., published by The Goodheart-Willcox Company, Incorporated (Chicago), 1956, pages 384-389, 393, 3 96499 and 500-501 relied on. i

Claims (1)

1. A COMBINED FILTER, DRYER AND ACID ABSORBED UNIT, COMPRISING: AN ELONGATEED TUBULAR CASING HAVING INLET AND OUTLET FIXTURES ADJACENT OPPOSITE ENDS THEREOF, A POROUS FILTER BLOCK SPANNING SAID CASING ADJACENT ONE END THEREOF, A MASS OF LOOSE FILL MOISTURE AND ACID ABSORBING MATERIAL IN THE OTHER END OF SAID CASING, A PAIR OF PERFORATE DISC MEMBERS ENGAGING OPPOSITE ENDS OF SAID MASS OF MATERIAL TO PREVENT AXIAL DISPLACEMENT OF SAID MATERIAL BY AXIAL FLOW OF REFRIGERANT THROUGH SAID UNIT, AND A COIL SPRING COMPRESSED BETWEEN AN END OF SAID FILTER BLOCK AND THE ADJACENT DISC MEMBER.
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Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347387A (en) * 1965-06-03 1967-10-17 Parker Hannifin Corp Filter-dryer
US3348692A (en) * 1964-12-21 1967-10-24 Parker Hannifin Corp Dryer with improved desiccant compressing spring
US3407617A (en) * 1966-12-05 1968-10-29 Sporlan Valve Co Method of removing dissolved wax from a refrigerant
US3407936A (en) * 1965-06-07 1968-10-29 Parker Hannifin Corp Spring loaded dryer
US3513661A (en) * 1968-09-09 1970-05-26 Danfoss As Desiccant-control of refrigerant compressor head pressure
US3546855A (en) * 1967-07-29 1970-12-15 Monnier Brothers Inc Apparatus for drying or filtering fluids
US3633377A (en) * 1969-04-11 1972-01-11 Lester K Quick Refrigeration system oil separator
US3783629A (en) * 1972-09-13 1974-01-08 C Phillips Refrigeration system
US3815752A (en) * 1972-03-02 1974-06-11 Sporlan Valve Co Refrigerant filter-drier
US4227901A (en) * 1978-07-26 1980-10-14 Sporlan Valve Company Filter-drier for heat pump systems
US4255940A (en) * 1979-08-09 1981-03-17 Parker-Hannifin Corporation Discharge line filter-dryer
US4278453A (en) * 1980-02-25 1981-07-14 Mako Compressors Inc. Gas purification
US4364756A (en) * 1981-07-07 1982-12-21 Virginia Chemicals Inc. Refrigerant suction line filter/filter-drier and method for the construction thereof
US4478619A (en) * 1983-05-02 1984-10-23 Arends Andrew G Compressed air filtering apparatus
US4480446A (en) * 1981-07-08 1984-11-06 Margulefsky Allen L Method and apparatus for rehabilitating refrigerant
US4745772A (en) * 1987-04-20 1988-05-24 Ferris James E Air conditioner auxiliary filter/drier refrigerant and chemical additive transfer device
US4753727A (en) * 1986-04-01 1988-06-28 The Lee Company Self-retaining smooth bore insert and method of installing same
US4804468A (en) * 1988-03-14 1989-02-14 The Lee Company Self-retaining smooth bore insert
US5089119A (en) * 1989-10-10 1992-02-18 General Electric Company Filter for a vapor compression cycle device
US5240483A (en) * 1992-04-27 1993-08-31 Mueller Refrigeration Products Co., Inc. Refrigerant filter-drier for use in a refrigerant recycling device
US5295367A (en) * 1990-09-26 1994-03-22 Technical Chemical Company Portable refrigerant handling apparatus and associated methods
US5402655A (en) * 1992-10-23 1995-04-04 Matsushita Refrigerator Company Refrigerant compressor and refrigeration system incorporating same
US5619865A (en) * 1995-08-22 1997-04-15 Maxwell; Ronal J. Refrigeration subcooler
FR2768804A1 (en) * 1997-09-19 1999-03-26 Valeo Climatisation Air-conditioner refrigerant circuit filtration and dehydration unit
US5946921A (en) * 1995-08-22 1999-09-07 General Electric Company Method for repairing HFC refrigerant system
EP0952407A3 (en) * 1998-04-24 2000-09-06 Mitsubishi Denki Kabushiki Kaisha A refrigeration cycle device, a method of producing the device, and a method of operating the device
EP0867320A3 (en) * 1997-03-25 2000-12-27 Deutsche Controls GmbH Air conditioning devive
EP1054221A3 (en) * 1999-05-20 2001-04-11 Mitsubishi Denki Kabushiki Kaisha Refrigeration system, and method of updating and operating the same
US6293125B1 (en) 1999-02-02 2001-09-25 Parker-Hannifin Corporation Non-directional filter dryer
US6708519B1 (en) 2002-12-30 2004-03-23 Bristol Compressors, Inc. Accumulator with internal desiccant
US20050109409A1 (en) * 2003-11-24 2005-05-26 Skillings Roger B. System and method for processing liquid
US20060053832A1 (en) * 2004-09-13 2006-03-16 Joseph Ballet Refrigerant accumulator
US20060119101A1 (en) * 2004-11-09 2006-06-08 Yukio Suzuki Pipe having enlarged and reduced diameters, and ejector using thereof
EP1744112A2 (en) 2005-07-13 2007-01-17 Jahn GmbH Dryer for a refrigerant in a refrigeration circuit, in particularly for an air conditioning system in a vehicule
US7175769B1 (en) * 2003-01-24 2007-02-13 Wall Thomas M Method of filtering debris from refrigerant
US20100313598A1 (en) * 2009-06-16 2010-12-16 Daly Phillip F Separation of a Fluid Mixture Using Self-Cooling of the Mixture
US20110061259A1 (en) * 2009-09-13 2011-03-17 Pindell Engineering Llc Exsiccate device
CN103900303A (en) * 2012-12-27 2014-07-02 浙江三花制冷集团有限公司 Filter
US20150369528A1 (en) * 2014-06-24 2015-12-24 Lg Electronics Inc. Cooling system and refrigerator including a cooling system
CN106225343A (en) * 2016-08-20 2016-12-14 常州麟喃热处理厂 Cleaning type metal heat treatmet reservoir
WO2019009705A1 (en) * 2017-07-03 2019-01-10 Spiro Enterprises B.V. A separator for separating gas and/or particles from a liquid
US20190145676A1 (en) * 2017-11-14 2019-05-16 Haier Us Appliance Solutions, Inc. Sealed system for a packaged terminal air conditioner unit
US10330362B1 (en) * 2017-12-20 2019-06-25 Rheem Manufacturing Company Compressor protection against liquid slug

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US2283989A (en) * 1938-06-04 1942-05-26 Guy J Henry Method of charging and conditioning dehydrators
US2325657A (en) * 1940-05-13 1943-08-03 Neal B Burkness Combined filter, dehydrator, and indicator
US2341430A (en) * 1941-07-19 1944-02-08 Westinghouse Electric & Mfg Co Method of reconditioning refrigerating apparatus and reclaiming refrigerant
US2600435A (en) * 1948-11-29 1952-06-17 Samuel A Shapiro Freon 12 dehydrator and manifold
US2705405A (en) * 1949-12-16 1955-04-05 Thomas L Uhlman Cleaner for refrigeration apparatus
US2873856A (en) * 1956-10-03 1959-02-17 Henry Valve Company Inc Refrigerant drier
CA603135A (en) * 1960-08-09 Q. Blanton Gerard Baffle type screen for refrigeration driers and method of assembly

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CA603135A (en) * 1960-08-09 Q. Blanton Gerard Baffle type screen for refrigeration driers and method of assembly
US2283989A (en) * 1938-06-04 1942-05-26 Guy J Henry Method of charging and conditioning dehydrators
US2325657A (en) * 1940-05-13 1943-08-03 Neal B Burkness Combined filter, dehydrator, and indicator
US2341430A (en) * 1941-07-19 1944-02-08 Westinghouse Electric & Mfg Co Method of reconditioning refrigerating apparatus and reclaiming refrigerant
US2600435A (en) * 1948-11-29 1952-06-17 Samuel A Shapiro Freon 12 dehydrator and manifold
US2705405A (en) * 1949-12-16 1955-04-05 Thomas L Uhlman Cleaner for refrigeration apparatus
US2873856A (en) * 1956-10-03 1959-02-17 Henry Valve Company Inc Refrigerant drier

Cited By (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348692A (en) * 1964-12-21 1967-10-24 Parker Hannifin Corp Dryer with improved desiccant compressing spring
US3347387A (en) * 1965-06-03 1967-10-17 Parker Hannifin Corp Filter-dryer
US3407936A (en) * 1965-06-07 1968-10-29 Parker Hannifin Corp Spring loaded dryer
US3407617A (en) * 1966-12-05 1968-10-29 Sporlan Valve Co Method of removing dissolved wax from a refrigerant
US3546855A (en) * 1967-07-29 1970-12-15 Monnier Brothers Inc Apparatus for drying or filtering fluids
US3513661A (en) * 1968-09-09 1970-05-26 Danfoss As Desiccant-control of refrigerant compressor head pressure
US3633377A (en) * 1969-04-11 1972-01-11 Lester K Quick Refrigeration system oil separator
US3815752A (en) * 1972-03-02 1974-06-11 Sporlan Valve Co Refrigerant filter-drier
US3783629A (en) * 1972-09-13 1974-01-08 C Phillips Refrigeration system
US4227901A (en) * 1978-07-26 1980-10-14 Sporlan Valve Company Filter-drier for heat pump systems
US4255940A (en) * 1979-08-09 1981-03-17 Parker-Hannifin Corporation Discharge line filter-dryer
US4278453A (en) * 1980-02-25 1981-07-14 Mako Compressors Inc. Gas purification
US4364756A (en) * 1981-07-07 1982-12-21 Virginia Chemicals Inc. Refrigerant suction line filter/filter-drier and method for the construction thereof
US4480446A (en) * 1981-07-08 1984-11-06 Margulefsky Allen L Method and apparatus for rehabilitating refrigerant
US4478619A (en) * 1983-05-02 1984-10-23 Arends Andrew G Compressed air filtering apparatus
US4753727A (en) * 1986-04-01 1988-06-28 The Lee Company Self-retaining smooth bore insert and method of installing same
US4745772A (en) * 1987-04-20 1988-05-24 Ferris James E Air conditioner auxiliary filter/drier refrigerant and chemical additive transfer device
US4804468A (en) * 1988-03-14 1989-02-14 The Lee Company Self-retaining smooth bore insert
US5089119A (en) * 1989-10-10 1992-02-18 General Electric Company Filter for a vapor compression cycle device
US5295367A (en) * 1990-09-26 1994-03-22 Technical Chemical Company Portable refrigerant handling apparatus and associated methods
US5240483A (en) * 1992-04-27 1993-08-31 Mueller Refrigeration Products Co., Inc. Refrigerant filter-drier for use in a refrigerant recycling device
US5562427A (en) * 1992-10-23 1996-10-08 Matsushita Refrigeration Company Filter arrangement for a refrigerant compressor
US5402655A (en) * 1992-10-23 1995-04-04 Matsushita Refrigerator Company Refrigerant compressor and refrigeration system incorporating same
US5619865A (en) * 1995-08-22 1997-04-15 Maxwell; Ronal J. Refrigeration subcooler
US5865038A (en) * 1995-08-22 1999-02-02 Maxwell; Ronal J. Refrigeration subcooler
US5946921A (en) * 1995-08-22 1999-09-07 General Electric Company Method for repairing HFC refrigerant system
EP0867320A3 (en) * 1997-03-25 2000-12-27 Deutsche Controls GmbH Air conditioning devive
FR2768804A1 (en) * 1997-09-19 1999-03-26 Valeo Climatisation Air-conditioner refrigerant circuit filtration and dehydration unit
EP1400767A2 (en) * 1998-04-24 2004-03-24 Mitsubishi Denki Kabushiki Kaisha A method of changing a refrigeration cycle device
EP1524479A1 (en) * 1998-04-24 2005-04-20 Mitsubishi Denki Kabushiki Kaisha Refrigeration cycle device
US6223549B1 (en) 1998-04-24 2001-05-01 Mitsubishi Denki Kabushiki Kaisha Refrigeration cycle device, a method of producing the device, and a method of operating the device
EP1400767A3 (en) * 1998-04-24 2004-04-07 Mitsubishi Denki Kabushiki Kaisha A method of changing a refrigeration cycle device
EP0952407A3 (en) * 1998-04-24 2000-09-06 Mitsubishi Denki Kabushiki Kaisha A refrigeration cycle device, a method of producing the device, and a method of operating the device
US6293125B1 (en) 1999-02-02 2001-09-25 Parker-Hannifin Corporation Non-directional filter dryer
US6510698B2 (en) 1999-05-20 2003-01-28 Mitsubishi Denki Kabushiki Kaisha Refrigeration system, and method of updating and operating the same
EP1054221A3 (en) * 1999-05-20 2001-04-11 Mitsubishi Denki Kabushiki Kaisha Refrigeration system, and method of updating and operating the same
US6708519B1 (en) 2002-12-30 2004-03-23 Bristol Compressors, Inc. Accumulator with internal desiccant
US7175769B1 (en) * 2003-01-24 2007-02-13 Wall Thomas M Method of filtering debris from refrigerant
US20050109409A1 (en) * 2003-11-24 2005-05-26 Skillings Roger B. System and method for processing liquid
US7048129B2 (en) 2003-11-24 2006-05-23 Skillings Roger B System and method for processing liquid
US20060053832A1 (en) * 2004-09-13 2006-03-16 Joseph Ballet Refrigerant accumulator
US7571622B2 (en) * 2004-09-13 2009-08-11 Carrier Corporation Refrigerant accumulator
US20060119101A1 (en) * 2004-11-09 2006-06-08 Yukio Suzuki Pipe having enlarged and reduced diameters, and ejector using thereof
EP1744112A2 (en) 2005-07-13 2007-01-17 Jahn GmbH Dryer for a refrigerant in a refrigeration circuit, in particularly for an air conditioning system in a vehicule
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