WO2001096773A1 - Raccord de tuyaux et dispositif frigorifique utilisant ce dernier - Google Patents

Raccord de tuyaux et dispositif frigorifique utilisant ce dernier Download PDF

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Publication number
WO2001096773A1
WO2001096773A1 PCT/JP2001/003393 JP0103393W WO0196773A1 WO 2001096773 A1 WO2001096773 A1 WO 2001096773A1 JP 0103393 W JP0103393 W JP 0103393W WO 0196773 A1 WO0196773 A1 WO 0196773A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
ring
unit
tapered surface
pipes
Prior art date
Application number
PCT/JP2001/003393
Other languages
English (en)
Japanese (ja)
Inventor
Shigeharu Taira
Original Assignee
Daikin Industries, Ltd.
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 Daikin Industries, Ltd. filed Critical Daikin Industries, Ltd.
Priority to AU2001248806A priority Critical patent/AU2001248806A1/en
Publication of WO2001096773A1 publication Critical patent/WO2001096773A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • 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
    • F25B2500/01—Geometry problems, e.g. for reducing size

Definitions

  • the present invention relates to a communication pipe cut used for connecting an indoor unit such as a split type air conditioner to an outdoor unit, and a refrigeration apparatus using the same.
  • a communication pipe unit that includes two pipes covered with a heat insulating material and connects an outdoor unit and an indoor unit of a split type air conditioner using a flare joint.
  • piping unit when the air conditioner is installed, both ends of the piping are flared using a special tool, and then the piping is connected to the closing valve, which is the piping connection between the indoor unit and the outdoor unit, with a flare joint. Are connected.
  • the above-mentioned connecting piping unit requires flare processing at the time of installation, so that it is troublesome, and there is a problem in that sealing performance is reduced due to adhesion of dust and processing unevenness, and refrigerant leakage occurs. Also, if a flammable refrigerant (propane, butane, ammo air, etc.) is used in the refrigerant circuit of the air conditioner, a leak may occur from the flare joint, causing a fire.
  • a flammable refrigerant propane, butane, ammo air, etc.
  • the refrigerant molecular weight is small at high pressure compared to R22, and gas leaks easily.
  • HFC refrigerants such as R4lOA, R32 or R4l0A, R whose pressure is several times higher than R32 when using 0 2 refrigerant, there is a problem that gas leakage occurs in the withstand voltage is low flare joint.
  • an object of the present invention is to provide a communication pipe unit that can easily and reliably connect pipes and effectively prevent refrigerant leakage even when high-pressure refrigerant is used, and a cooling pipe unit using the same. It is to provide a freezing device.
  • a communication pipe unit of the present invention includes a pipe and a tightening joint provided at at least one end of the pipe, wherein the pipe is connected to a pipe connecting part by the tightening joint.
  • a pipe cut, wherein the tightening joint has a screw that is screwed into a screw formed on an outer periphery of the pipe connection part, a nut having a step on the inner periphery, and the pipe
  • a first ring having a front tapered surface corresponding to a divergent tapered surface formed on the inner periphery of the connecting portion; and a first ring abutting on a rear surface of the first ring and being provided by the step of the nut.
  • a second ring pressed toward the second ring.
  • the first ring, the second ring, and the nut are sequentially fitted to the outer circumference from the end side, and inserted into the inside of the pipe connection part on the connection partner side, and the nut of the nut is screwed. Is screwed into a screw formed on the outer periphery of the pipe connection part, and the nut is tightened. Then, the rear surface of the second ring is pressed toward the first ring by the step on the inner periphery of the nut, and the rear surface of the first ring is pressed against the front surface of the second ring, thereby reducing the front tapered surface of the first ring. Closely contact the tapered surface of the pipe connection.
  • the front side of the first ring is reduced inward in the radial direction by the tapered surface of the pipe connection portion, so that the inside of the first ring is tightly sealed, and the space between the first ring and the pipe is sealed, and they are fixed to each other.
  • the tapered surface of the pipe connection portion and the tapered surface of the front surface of the first ring are brought into close contact with each other to seal therebetween.
  • the HFC-based refrigerant is added to the refrigerant circuit.
  • C 0 be a natural refrigerant containing 2 carbon oxides) in, it can be reliably prevented leakage of refrigerant, thereby improving the reliability of the air conditioner.
  • this connecting piping unit does not require special tools for pipe connection or fire for piercing, and there is no variation due to flaring or piercing. Can connect.
  • connection and disconnection of the pipe to the pipe connection can be repeated without impairing the sealing performance.
  • a rear tapered surface is formed on the rear inner periphery of the first ring, while the front surface of the second ring is in contact with the inside of the rear tapered surface.
  • the nut when the pipe is connected to the pipe connection portion, the nut is gradually tightened, and the rear surface of the second ring is pressed toward the first ring by the step on the inner periphery of the nut. Then, the front part of the second ring presses the inside of the rear tapered surface of the first ring, and the front part of the second ring contracts radially inward by the rear tapered surface of the rear inner circumference of the first ring.
  • Two pipes each having a soil fastening joint at at least one end thereof may be bundled.
  • two pipes used as the gas refrigerant communication pipe and the liquid refrigerant communication pipe in the refrigerant circuit of the refrigeration unit can be unitized.
  • the above-mentioned tightening joints respectively provided at the ends of the two pipes are arranged at predetermined intervals in the radial direction of the pipe, pipe connection is performed.
  • the fastening joints do not interfere with each other when connected to the parts. The same effect can be obtained even when the tightening joint portions provided at the ends of the two pipes are arranged at a predetermined interval in the axial direction of the pipes.
  • the fastening joint may be provided at one end of the pipe, and the other end of the pipe may be brazed to the pipe connection.
  • the connecting pipe unit and the indoor unit can be integrated with each other by brazing the other end of the pipe to, for example, a pipe connection portion of the indoor unit. Therefore, the assembly work can be simplified by assembling in the factory and reducing the number of connecting pipes at the time of installation, and in particular, air using a slightly flammable refrigerant such as R32 and an HC-based refrigerant such as propane. In refrigeration equipment such as a harmony machine, high safety can be obtained.
  • the refrigeration apparatus of the present invention is characterized by using a communication piping unit having any one of the above configurations.
  • This refrigeration apparatus uses the above-mentioned communication piping unit to provide the above-described refrigerant circuit. Even if a high-pressure refrigerant such as R410AR32 is used, refrigerant leakage can be reliably prevented, and the reliability of refrigeration systems such as air conditioners is improved. In addition, by preventing refrigerant leakage, environmental destruction can be prevented, and safety when using flammable refrigerant can be improved. Furthermore, there is no need for special tools for pipe connection or fire for brazing, and there is no variation due to flaring or brazing, and pipes can be easily and reliably connected by tightening nuts.
  • FIG. 1 is a schematic configuration diagram of a main part of a communication pipe unit according to a first embodiment of the present invention.
  • FIG. 2 is a sectional view of a main part of the communication pipe unit.
  • FIG. 3 is a schematic configuration diagram of a main part of a communication pipe unit according to a second embodiment of the present invention.
  • FIG. 4 is a schematic configuration diagram of a main part of a communication pipe unit according to a third embodiment of the present invention.
  • FIG. 5 is a schematic configuration diagram of a main part of an air conditioner using a communication pipe butt according to a fourth embodiment of the present invention.
  • FIG. 1 is a schematic configuration diagram of a main part of a communication pipe unit according to the first embodiment of the present invention.
  • the communication pipe unit connects an indoor unit and an outdoor unit of a split-type air conditioner (not shown).
  • the pipe connecting portions 20 on the indoor unit side and the outdoor unit side to which the connecting pipe unit 10 is connected are provided with a large-diameter portion 20a and a small-diameter portion on the inner periphery in order from the outside.
  • a tapered surface 22 diverging is formed on the open end side of the large diameter portion 20a.
  • the above-mentioned connecting pipe cut 10 is composed of pipe 1, nut 2, and An annular front ferrule 3 as a first ring and an annular pack ferrule 4 as a second ring are provided.
  • the nut 2 has a screw 11 formed on an inner periphery thereof to be screwed with a screw 21 formed on the outer periphery of the pipe connection portion 20.
  • the annular front ferrule 3 has a front tapered surface 3a closely contacting the tapered surface 22 of the large diameter portion 20a of the pipe connection portion 20.
  • the annular back ferrule 4 has a flange 4a at one end on the nut 2 side.
  • the front ferrule 3, the back ferrule 4, and the nut 2 are externally fitted in order from the end of the pipe 1.
  • the nut 2, Freon Toferrule 3 and Bag Ferrule 4 constitute the tightening joint 12.
  • FIG. 1 shows only one end of the pipe 1 having the tightening joint 12, the same tightening joint is provided at the other end of the pipe 1 not shown.
  • the communication pipe unit 10 is unitized by bundling two rooster 3 pipes 1 shown in FIG. Further, the pipe connection part 20 is a part of a closing valve.
  • the tip of the pipe 1 is connected to the large diameter section 20 a and the small diameter section 2 Ob. Insert the end of the pipe 1 into the large-diameter section 20a of the pipe connection section 20 until it abuts the step 20c between them, and then gradually tighten the nut 2. At this time, the rear surface 4 b of the back ferrule 4 is pressed toward the front ferrule 3 by the inner step 2 a of the nut 2, and the rear surface of the front ferrule 3 is pressed by the front surface of the knock ferrule 4.
  • the front tapered surface 3 a of the front ferrule 3 is brought into close contact with the tapered surface 22 of the pipe connection portion 20. Then, the front side of the front ferrule 3 is reduced inward in the radial direction by the tapered surface 22 of the pipe connection portion 20, so that the inner pipe 1 is hardly inserted, and the space between the front ferrule 3 and the pipe 1 is sealed. At the same time, fix the front ferrule 3 to the pipe 1. At the same time, the tapered surface 22 of the pipe connection portion 20 and the front tapered surface 3a of the front ferrule 3 come into close contact with each other, and the space therebetween is sealed.
  • the rear surface 4b of the above-mentioned buffer ferrule 4 is pressed toward the front ferrule 3 by the inner step 2a of the nut 2, and the front portion of the back ferrule 4 is tapered to the rear tapered surface 3b of the front ferrule 3. Press the inside of the notch, and the front of the 3 Reduced radially inward by the rear tapered surface 3b of the inner circumference of the rear, baffled the inner piping 1, sealed between the back ferrule 4 and the piping 1, and fixed the back ferrule 4 to the piping 1. I do. At the same time, the space between the rear tapered surface 3 b of the front ferrule 3 and the front portion of the back ferrule 4 is sealed.
  • the knock ferrule 4 prevents the front ferrule 3 from rotating when the nut 2 is tightened.
  • a two-compression ring type joint is constituted by the pipe connection part 20, the front ferrule 3, the back ferrule 4, and the nut 2.
  • the connecting piping unit 10 does not require flaring or brazing of piping, there is no need to use special tools for connection or fire for brazing, and variations due to flaring or brazing are not required.
  • the nut 2 can be easily and securely connected by tightening the nut 2 to the pipe connection part 20, and the connection and disconnection of the pipe 1 to and from the pipe connection part 20 can be performed without deteriorating the sealing performance. Can be repeated.
  • R 410 as an alternative refrigerant to the HCFC refrigerant is used.
  • production of products corresponding using natural refrigerants containing a and R 3 2, etc. HFC refrigerant and C 0 2 (carbon dioxide) can be early.
  • a rear tapered surface 3b diverging around the rear inner periphery of the front ferrule 3 is formed, while the front portion of the pack ferrule 4 contacts the inside of the rear tapered surface 3b, so that the back ferrule is formed. 4 and the pipe 1, and they can be fixed to each other.
  • the front tapered surface 3a of the front ferrule 3 and the back A seal can be formed between the front part of the ferrule 4 and refrigerant leakage can be more effectively prevented.
  • the pipe connection part 20, the front ferrule 3, the back ferrule 4, and the nut 2 are made of stainless steel (SUS material) or brass, and the cost is preferably reduced by using a low-cost material such as brass. Can be reduced.
  • FIG. 3 is a schematic view of the communication pipe cut of the second embodiment of the present invention.
  • the connection pipe cut of the first embodiment except for the position of the fastening joint is shown in FIG. It has the same configuration as the connecting pipe shown in Fig. 1.
  • the communication pipe cut includes two pipes 31A and 31B, and tightening joints 32A and 32B provided at one end of the pipes 31A and 31B, respectively.
  • the joints 32A and 32B are arranged at a predetermined interval L1 in the radial direction of the pipes 31A and 31B. Further, although not shown, the other end of the communication pipe has the same configuration.
  • the fastening joints 32A and 32B are composed of a nut 2, a front ferrule 3 and a back ferrule 4 shown in FIG.
  • FIG. 4 is a schematic diagram of a communication pipe unit according to a third embodiment of the present invention. This communication pipe cut is shown in FIG. 1 of the first embodiment except for the position of a fastening joint. It has the same configuration as the communication pipe.
  • the communication pipe cut includes two pipes 41A and 41B, and tightening joints 42A and 42B provided at one ends of the pipes 41A and 41B, respectively.
  • the joints 42A and 42B are arranged at a predetermined interval L2 in the axial direction of the pipes 41A and 41B.
  • the other end of the contact rooster control unit has the same configuration.
  • the fastening joints 32A and 32B are composed of a nut 2, a front ferrule 3 and a back ferrule 4 shown in FIG.
  • the tightening joints 42A, 42B are axially interposed between the pipes 41A, 41B. Since they are separated by the distance L2, the tightening joints 42A and 42B do not interfere with each other when connected to the pipe connection.
  • FIG. 5 is a schematic diagram of an air conditioner using a connecting pipe unit according to a fourth embodiment of the present invention.
  • This connecting pipe cut is different from that of the first embodiment except that a fastening joint is used only at one end of the pipe. Therefore, it has the same configuration as that of the communication pipe cut shown in FIG. 3 of the second embodiment.
  • the communication piping unit includes two pipes 51A and 51B, and tightening joints 52A and 52B at one end of the pipes 51A and 51B, and connects the tightening joints 52A and 52B to each other.
  • the pipes 51A and 51B are separated along the radial direction.
  • the other ends of the pipes 51A and 51B are connected to pipe connection portions 54A and 54B of the indoor unit 55 by brazing, respectively.
  • the portions excluding both ends of the pipes 51A and 51B are covered with a heat insulating material 53 and bundled.
  • the piping connection portions 54A and 54B of the indoor unit 55 are closing valves.
  • the other ends of the pipes 51A and 51B are connected in advance at the time of assembling at the factory, and the communication pipe unit and the indoor unit 55 are integrated, so that the connection pipe at the time of installation is integrated.
  • installation work can be simplified, and high safety can be obtained especially for air conditioners using slightly flammable refrigerants such as R32.
  • the fastening joints are provided at both ends of the pipes 1, 31A, 31B, 41A, 41B.
  • the fastening joints are provided only at one end of the pipe.
  • the other end of the pipe may be connected to the pipe connection part by brazing.
  • the other end of the pipe may be connected by brazing at the time of installation, or the other end of the pipe may be connected to the pipe connection part in advance at a factory.
  • the communication pipe unit for connecting the indoor unit and the outdoor unit of the split type air conditioner has been described.
  • the present invention is applied to a communication pipe unit used for another refrigeration device. May be.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Joints With Pressure Members (AREA)

Abstract

L'invention concerne un raccord de tuyaux (10), comprenant un joint de serrage (12) monté sur une extrémité d'un tuyau (1) possédant une vis (11) vissée sur un filetage (21) formé sur la surface périphérique extérieure d'un raccord de tuyaux (20), un écrou (2) possédant une partie à gradins (2a) sur sa surface périphérique intérieure, une bague d'extrémité avant (3) possédant une surface conique avant (3a) correspondant à une surface conique divergente (22) formée sur la surface périphérique intérieure du raccord de tuyaux (20), et une bague d'extrémité arrière (4) pouvant venir en butée sur la surface arrière de la bague d'extrémité avant (3) et comprimée contre celle-ci (3) par la partie à gradins (2a) de l'écrou (2). Ainsi, par serrage de l'écrou (2), le jeu entre la bague d'extrémité avant (3) et le tuyau (1) et le jeu entre la surface conique (22) du raccord de tuyaux (20) et la surface conique avant (3a) de la bague d'extrémité avant (3) peuvent être scellés.
PCT/JP2001/003393 2000-06-15 2001-04-20 Raccord de tuyaux et dispositif frigorifique utilisant ce dernier WO2001096773A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001248806A AU2001248806A1 (en) 2000-06-15 2001-04-20 Communication piping unit and refrigerating device using the unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-179842 2000-06-15
JP2000179842 2000-06-15

Publications (1)

Publication Number Publication Date
WO2001096773A1 true WO2001096773A1 (fr) 2001-12-20

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ID=18681041

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/003393 WO2001096773A1 (fr) 2000-06-15 2001-04-20 Raccord de tuyaux et dispositif frigorifique utilisant ce dernier

Country Status (3)

Country Link
AU (1) AU2001248806A1 (fr)
TW (1) TW475047B (fr)
WO (1) WO2001096773A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003254242A (ja) * 2002-02-27 2003-09-10 Tokico Ltd 圧縮機
JP2007239947A (ja) * 2006-03-10 2007-09-20 Daikin Ind Ltd 管継手、冷凍装置、ヒートポンプ式給湯機、及び給水配管
US10591103B1 (en) * 2016-02-25 2020-03-17 Mercury Plastics Llc Tube connector assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5454918U (fr) * 1977-09-26 1979-04-16
JPS6128991U (ja) * 1984-07-21 1986-02-21 エスエムシ−株式会社 多重管用コネクタ−
JPH05240380A (ja) * 1991-03-22 1993-09-17 Kiyohara Masako 管継手およびその組立方法
JPH0875041A (ja) * 1994-09-08 1996-03-19 Fuji Giken Kk 銅パイプの配管方法及びそれに使用する連結用曲り銅パイプの構造

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5454918U (fr) * 1977-09-26 1979-04-16
JPS6128991U (ja) * 1984-07-21 1986-02-21 エスエムシ−株式会社 多重管用コネクタ−
JPH05240380A (ja) * 1991-03-22 1993-09-17 Kiyohara Masako 管継手およびその組立方法
JPH0875041A (ja) * 1994-09-08 1996-03-19 Fuji Giken Kk 銅パイプの配管方法及びそれに使用する連結用曲り銅パイプの構造

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003254242A (ja) * 2002-02-27 2003-09-10 Tokico Ltd 圧縮機
JP2007239947A (ja) * 2006-03-10 2007-09-20 Daikin Ind Ltd 管継手、冷凍装置、ヒートポンプ式給湯機、及び給水配管
US10591103B1 (en) * 2016-02-25 2020-03-17 Mercury Plastics Llc Tube connector assembly

Also Published As

Publication number Publication date
AU2001248806A1 (en) 2001-12-24
TW475047B (en) 2002-02-01

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