WO2013150858A1 - 管継手、空気調和機、接続管の製造方法、接続管、及び接続方法 - Google Patents
管継手、空気調和機、接続管の製造方法、接続管、及び接続方法 Download PDFInfo
- Publication number
- WO2013150858A1 WO2013150858A1 PCT/JP2013/056340 JP2013056340W WO2013150858A1 WO 2013150858 A1 WO2013150858 A1 WO 2013150858A1 JP 2013056340 W JP2013056340 W JP 2013056340W WO 2013150858 A1 WO2013150858 A1 WO 2013150858A1
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- WIPO (PCT)
- Prior art keywords
- pipe
- joint
- connection pipe
- insertion hole
- nut member
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Classifications
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- 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
- F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
- B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
- B21D17/025—Forming single grooves in sheet metal or tubular or hollow articles by pressing by pressing tubes axially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
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- 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
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/04—Screw-threaded joints; Forms of screw-threads for such joints with additional sealings
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- 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
- F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
- F16L19/0225—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means without sealing rings
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- 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
- F16L19/025—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges
- F16L19/028—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall
-
- 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
- F16L19/025—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges
- F16L19/028—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall
- F16L19/0283—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall and having a bell-mouthed shape
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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
- F25B2500/221—Preventing leaks from developing
Definitions
- the present invention relates to a pipe fitting, an air conditioner, a method of manufacturing a connecting pipe, a connecting pipe, and a connecting method.
- a pipe joint When connecting pipes to each other or connecting a connection port of a fluid supply source to a pipe, a pipe joint according to the application is used.
- a flared pipe joint defined in JIS B 8607 is generally used for connection between a refrigerant pipe for flowing a refrigerant of an air conditioner and a connection port of an indoor unit or an outdoor unit of the air conditioner (see For example, refer to Patent Document 1).
- the present invention has been made under the circumstances described above, and it is an object of the present invention to provide a pipe joint having high sealing capacity, an air conditioner, a method of manufacturing a connecting pipe, a connecting pipe, and a connecting method.
- the pipe joint of the present invention is a pipe joint to which a connecting pipe is connected, and has a pipe joint body and a nut member.
- a male screw portion is formed on the outer peripheral surface, and a first insertion hole is formed in which the connection pipe is inserted and which has a first joint surface for joining to the connection pipe.
- the nut member is formed with a second insertion hole having a female screw portion into which the male screw portion is screwed, and a second joint surface into which the connection pipe is inserted and joined to the connection pipe. .
- connection pipe in which a radially expanded bulging portion is formed When the connection pipe in which a radially expanded bulging portion is formed is connected to the pipe joint, the male screw portion of the pipe joint main body is screwed into the female screw portion of the nut member. Thus, the bulging portion is sandwiched between the first bonding surface and the second bonding surface. Then, the joint portion between the bulging portion and the first joint surface forms a first seal portion, and the joint portion between the bulging portion and the second joint surface forms a second seal portion. . Further, the end face of the pipe fitting main body is joined to a part of the inner peripheral surface of the second insertion hole of the nut member to form a third seal portion.
- connection pipe formed at the end when the connection pipe formed at the end is connected to the radially expanded bulging portion, the three sealing portions including the first sealing portion, the second sealing portion, and the third sealing portion It is formed. Therefore, it is possible to provide a pipe joint having high sealing capability, an air conditioner, a method of manufacturing a connecting pipe, a connecting pipe, and a connecting method.
- FIG. 1 It is a schematic diagram of the air conditioner concerning Embodiment 1 of this invention. It is a partial cross section figure of the pipe joint concerning an embodiment of the invention. It is sectional drawing which expands and shows a part of FIG. It is a partial cross section figure which disassembled and showed a pipe joint. It is sectional drawing (the 1) which showed the manufacturing method of a connection pipe. It is sectional drawing (the 2) which showed the manufacturing method of a connecting pipe. It is sectional drawing (the 3) which showed the manufacturing method of a connecting pipe. It is sectional drawing for demonstrating the connection of a pipe joint and a connection pipe. It is sectional drawing of the pipe joint to which the connecting pipe from which the shape of a bulging part differs is connected. It is sectional drawing which expanded FIG.
- FIG. 9A partially. It is sectional drawing of the pipe joint which concerns on Embodiment 2 of this invention. It is sectional drawing of the pipe joint which concerns on Embodiment 3 of this invention. It is sectional drawing which expanded FIG. 11A partially. It is sectional drawing of the pipe joint which concerns on Embodiment 4 of this invention. It is sectional drawing which expanded FIG. 12A partially.
- Embodiment 1 Hereinafter, a pipe joint 10 and an air conditioner 100 according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 8.
- XYZ coordinates are set and referred to as appropriate.
- the air conditioner 100 which concerns on Embodiment 1 of this invention is used for temperature control of the room of air-conditioning object.
- the air conditioner 100 includes an indoor unit 102, an outdoor unit 103, and a plurality of connection pipes 101 connecting the indoor unit 102 and the outdoor unit 103.
- the connection pipe 101 is a pipe through which the refrigerant constituting the refrigeration cycle flows.
- R32 composed of difluoromethane (CH 2 F 2 ) is used as the refrigerant.
- the indoor unit 102 is installed in a room to be air conditioned, and exchanges heat with indoor air.
- the outdoor unit 103 is installed outdoors, and exchanges heat with the air outside.
- each connection pipe 101 is provided with a shutoff valve 104. The shutoff valve 104 closes or opens the flow of the refrigerant in the connection pipe 101.
- the pipe joint 10 is used to connect the connection pipe 101 and the connection port 102 a of the indoor unit 102.
- the pipe joint 10 has a pipe joint body 20 and a nut member 30 as shown in FIGS. 2 and 3.
- the Z-axis direction corresponds to the axial direction of the fitting body 20 and the connection pipe 101.
- the pipe fitting main body 20 is a substantially cylindrical member in which a male screw 25 is formed on the outer peripheral surface.
- the pipe fitting main body 20 is formed of, for example, metal or resin such as stainless steel, steel, aluminum alloy or the like.
- an insertion hole 21 (first insertion hole) is formed in the pipe joint body 20.
- the connection pipe 101 is inserted into the insertion hole 21 from the + Z side, thereby forming a passage through which the refrigerant of the refrigeration cycle flows.
- a tapered surface 22 (first joint surface) is formed on the inner circumferential surface of the insertion hole 21.
- the tapered surface 22 is formed to be inclined with respect to the Z-axis direction (the axial direction of the connection pipe 101).
- the inclination angle ⁇ 1 of the tapered surface 22 is, for example, 45 °.
- a straight hole surface 23 is formed at the opening on the + Z side of the insertion hole 21.
- the straight hole surface 23 is formed in parallel to the Z-axis direction (the axial direction of the connection pipe 101).
- the connection port 102 a of the indoor unit 102 is connected to the end on the + Z side of the pipe fitting main body 20.
- the connection port 102 a is connected, for example, by brazing.
- the nut member 30 is comprised from a hexagonal nut, as shown in FIG.
- the nut member 30 is formed of, for example, a metal or resin such as stainless steel, steel, brass, or an aluminum alloy.
- the nut member 30 is formed with an insertion hole 31 (second insertion hole) penetrating in the Z-axis direction. In the insertion hole 31, a portion where the bulging portion 101a of the connection pipe 101 is not formed is inserted. Further, the inner peripheral surface of the insertion hole 31 has a holding surface 32 for holding the connection pipe 101 at a radial position, a female screw 33 for screwing with the male screw 25 of the pipe joint main body 20, and a holding surface 32.
- a tapered surface 34 (second joint surface) formed between the female screw 33 and the female screw 33 is formed.
- the tapered surface 34 is formed to be inclined with respect to the Z-axis direction (the axial direction of the connection pipe 101). Further, the tapered surface 34 is formed to face the tapered surface 22 of the pipe joint body 20, and sandwiches the bulging portion 101a of the connection pipe 101 together with the tapered surface 22.
- the inclination angle ⁇ 2 of the tapered surface 34 is, for example, 45 °.
- the nut member 30 has a shape in accordance with JIS B 8607. However, the present invention is not limited to this, and the nut member 30 may not have a shape conforming to JIS.
- a tapered surface 24 (third joint surface) inclined with respect to the Z-axis direction is formed on the end face of the pipe joint body 20.
- the tapered surface 24 is formed parallel to the tapered surface 34 of the insertion hole 31 of the nut member 30.
- the inclination angle ⁇ 3 of the tapered surface 24 is, for example, 45 ° in accordance with the inclination angle ⁇ 2 of the tapered surface 34.
- the connection pipe 101 shown in FIG. 1 is a pipe serving as a passage of refrigerant flowing between the indoor unit 102 and the outdoor unit 103 of the air conditioner 100.
- the connection pipe 101 is, for example, a metal pipe (copper pipe).
- the connection pipe 101 has a connection pipe main body 101 b and a bulging portion 101 a.
- the bulging portion 101a is formed in a balloon shape at the end on the ⁇ Z side of the connection pipe main body 101b.
- the bulging portion 101a has an enlarged diameter portion 101c that expands in the radial direction from the connection pipe main body 101b, and a reduced diameter portion 101d that narrows in the radial direction from the enlarged diameter portion 101c.
- the bulging portion 101a is formed at the end on the ⁇ Z side of the connection pipe main body 101b.
- the invention is not limited to this, as long as it is formed in at least a part of the connection pipe main body 101b.
- the bulging part 101a of the connection pipe 101 is formed, for example, using an existing flare processing tool (diameter enlarging member) 50 as shown in FIG.
- the flare processing tool 50 includes, for example, a flare die (fixing member) 51 for fixing the connection pipe 101, and a flare cone (rotational pressing member) 52 for expanding the end opening of the connection pipe 101.
- the tube member 110 is fixed to the flare die 51 by being radially tightened by a clamp device or the like.
- the flare die 51 is disposed at a predetermined distance L (heading dimension) from the end on the ⁇ Z side of the tube member 110.
- a tapered surface 51 b is formed at the edge of the opening on the ⁇ Z side of the through hole 51 a of the flare die 51.
- the inclination angle ⁇ 4 of the tapered surface 51b is, for example, 45 ° in accordance with the inclination angle ⁇ 2 of the tapered surface 34.
- the adapter 60 is fitted into the pipe member 110.
- the adapter 60 is a substantially cylindrical member in which the flange portion 61 is formed, and is fitted from the -Z side of the pipe member 110.
- the end on the ⁇ Z side of the pipe member 110 abuts on the surface on the + Z side of the flange portion 61.
- the flare cone 52 of the flare processing tool 50 is moved in the + Z direction while being rotated about the Z axis.
- the flare cone 52 rotates while sliding relative to the adapter 60.
- the adapter 60 compresses the end on the ⁇ Z side of the tube member 110 in the Z-axis direction.
- the end portion of the compressed tube member 110 is expanded in diameter and deformed so as to expand like a balloon while being restrained by the tapered surface 51 b of the flare die 51.
- the connection pipe 101 in which the bulging portion 101a is formed is completed.
- the bulging portion 101 a formed as described above has the tapered surface 22 of the insertion hole 21 of the pipe joint main body 20 by screwing the nut member 30 to the pipe joint main body 20, It is pinched and fixed to the taper surface 34 of the insertion hole 31 of the nut member 30 in the Z-axis direction (the axial direction of the connection pipe 101).
- the bulging portion 101a is compressed in the Z-axis direction and abuts on the tapered surface 22 to form a seal portion S1 (first seal portion).
- the expanded portion 101a is compressed in the Z-axis direction and abuts on the tapered surface 34 to form a seal portion S2 (second seal portion).
- the bulging portion 101 a is slightly expanded in the radial direction by being pinched by the opposing tapered surfaces 22 and 34, and also abuts on the straight hole surface 23.
- the seal portion S4 (fourth seal portion) is formed.
- the tapered surface 34 of the insertion hole 31 of the nut member 30 is joined to the tapered surface 24 of the end face of the pipe joint main body 20.
- the seal portion S3 (third seal portion, metal seal portion) is formed. Therefore, the pipe joint 10 to which the connection pipe 101 is connected is sealed at four seal parts (seal parts S1, S2, S3, S4).
- the bulging portion 101a of the connection pipe 101 is sandwiched between the tapered surface 22 of the pipe joint main body 20 and the tapered surface 34 of the nut member 30, and is straight.
- the seal portions S1, S2, and S4 are formed.
- the tapered surface 34 of the nut member 30 is joined to the tapered surface 24 of the pipe joint main body 20 to form the seal portion S3. For this reason, it is possible to provide a method of manufacturing a pipe joint having high sealing capacity, an air conditioner, and a connecting pipe connected to the pipe joint.
- the leakage path E1 is a path through which the refrigerant moves along the outer periphery of the bulging portion 101a of the connection pipe 101 and leaks from the holding surface 32 of the nut member 30.
- the leakage path E2 is a path through which the refrigerant moves along the outer periphery of the bulging portion 101a of the connection pipe 101 and leaks from a screwing portion between the male screw 25 and the female screw 33.
- the four seal portions S1 to S4 seal the refrigerant, even if any seal portion has unevenness such as a flaw, the refrigerant is a pipe joint Leakage to the outside of 10 can be suitably prevented.
- the pipe joint 10 according to the first embodiment is configured of the pipe joint main body 20 and the nut member 30, the pipe joint 10 is disposed between the pipe joint main body 20 and the nut member 30 in order to enhance the sealing ability. It is not necessary to separately use parts such as a front ferrule and a back ferrule that Therefore, the increase in the number of parts does not increase the manufacturing cost.
- connection pipe 101 connected to the pipe joint 10 according to the first embodiment is formed by using the existing flare processing tool (diameter expanding member) 50 after the adapter 60 is fitted into the pipe member 110. Ru. Therefore, regardless of the user's skill in flare processing, it is possible to easily obtain the connection pipe 101 in which the bulging portion 101a is formed. Moreover, the dispersion
- the inclination angle ⁇ 1 of the tapered surface 22 of the insertion hole 21 of the fitting body 20 is illustrated as 45 °.
- the present invention is not limited to this, and the inclination angle ⁇ 1 may be an inclination angle different from 45 °.
- the preferable range of the inclination angle ⁇ 1 is 43 ° to 47 °, and more preferably, as shown in the present embodiment. , 45 °.
- the inclination angle ⁇ 2 of the tapered surface 34 of the insertion hole 31 of the nut member 30 is exemplified as 45 °.
- the present invention is not limited to this, and the inclination angle ⁇ 2 may be an inclination angle different from 45 °.
- the preferable range of the inclination angle ⁇ 2 is 43 ° to 47 °, and more preferably, as shown in the present embodiment. , 45 °.
- the inclination angle ⁇ 3 of the tapered surface 24 formed on the end face of the pipe joint main body 20 is exemplified as 45 °.
- the present invention is not limited to this, and the inclination angle ⁇ 3 may be an inclination angle different from 45 °.
- the inclination angle ⁇ 2 of the tapered surface 34 of the insertion hole 31 of the nut member 30 is preferably equal.
- connection pipe 201 in which the flared portion 201a expansion diameter portion
- the connection pipe 201 in which the flared portion 201a is used as the pipe joint 10 of the present embodiment. It is also possible to connect.
- the connection pipe 201 is held by the flared portion 201a being sandwiched between the tapered surface 24 formed in the insertion hole 21 of the nut member 30 and the tapered surface 34 formed on the outer peripheral surface of the pipe joint body 20.
- the pipe joint 10 according to the present embodiment can be compatible with the existing pipe joint connected to the connection pipe 201 in which the flared portion 201a is already formed.
- the user can appropriately select the pipe joint 10 according to the present embodiment and the existing pipe joint.
- the pipe joint main body 20 has the straight hole surface 23 for forming seal part S4.
- the present invention is not limited to this, and as in the pipe joint 10A according to the third embodiment shown in FIGS. 11A and 11B, the straight hole surface 23 may not be provided. Even in this case, the refrigerant can be suitably prevented from leaking to the outside of the pipe joint 10 by being sealed by the three seal portions S1, S2, and S3.
- the pipe joint 10 according to the first embodiment since the four seal portions S1, S2, S3, S4 are sealed, straight from the viewpoint of sealing ability It is preferable to have the hole surface 23.
- the pipe joint main body 20 has the straight hole surface 23 for forming the seal portion S4.
- the nut member 30 may have the straight hole surface 35 as in the pipe joint 10B according to the third embodiment shown in FIGS. 12A and 12B.
- the bulging portion 101a of the connection pipe 101 is sandwiched between the tapered surface 22 of the pipe joint main body 20 and the tapered surface 34 of the nut member 30, and the inner circumferential surface of the straight hole surface 35 of the nut member 30 By contacting, seal parts S1, S2, and S4 are formed.
- the tapered surface 36 of the nut member 30 is joined to the tapered surface 22 of the pipe joint main body 20, whereby the seal portion S3 (metal seal portion) is formed.
- R32 made of difluoromethane (CH 2 F 2 ) is used as the refrigerant of the refrigeration cycle.
- the refrigerant is not limited to this, and the refrigerant may be HFO1234yf (hydrofluoroolefin), or may be a mixed refrigerant of R32 and HFO1234yf.
- R32 and HFO1234yf are used as alternatives to conventional refrigerants (eg, R22, R410A, etc.) for preventing global warming, but unlike conventional refrigerants, they are flammable. There are many cases. In the pipe joint 10 of the present embodiment, as described above, since the sealing ability is high, the air conditioner 100 can be safely used even when using a flammable alternative fluorocarbon.
- the pipe joint 10 is used to connect the connection pipe 101 and the connection port 102 a of the indoor unit 102 of the air conditioner 100, but the present invention is not limited to this.
- the connection port of the outdoor unit 103 may be used.
- the pipe joint 10 is used for the connection pipe 101 for conveying the refrigerant of the air conditioner 100.
- the present invention is not limited to this.
- the present invention is also applicable to devices other than the connection pipe 101 of the air conditioner 100.
- the pipe joint of the present invention is suitable for connecting connection pipes used in an air conditioner.
- the air conditioner of this invention is suitable for air conditioning of air conditioning object.
- the manufacturing method of the connection pipe of this invention is suitable for manufacturing the connection pipe used for an air conditioner.
- the connection pipe of the present invention is suitable for connection to a pipe joint used in an air conditioner.
- the connection method of the present invention is suitable for connecting a pipe joint and a connection pipe used in an air conditioner.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Pressure Members (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
Description
以下、本発明の実施の形態1に係る管継手10及び空気調和機100について、図1~図8を用いて説明する。なお、理解を容易にするため、XYZ座標を設定し、適宜参照する。
また、図10に示すように、膨出部101aが形成された接続管101に代えて、フレア部201a(拡径部)が形成された接続管201を、本実施の形態の管継手10に接続することも可能である。この場合、フレア部201aが、ナット部材30の挿入孔21に形成されたテーパ面24と、管継手本体20の外周面に形成されたテーパ面34とに挟まれることで、接続管201は、管継手10に接続される。したがって、既にフレア部201aが形成された接続管201に接続されている既存の管継手から、本実施の形態に係る管継手10に互換することができる。また、接続管に接続されている管継手を交換する際に、ユーザは、本実施の形態に係る管継手10と、既存の管継手とを、適宜、選択することができる。
また、上記実施の形態1では、管継手本体20が、シール部S4を形成するためのストレート孔面23を有している。しかしながら、これに限らず、図11A及び図11Bに示す実施の形態3に係る管継手10Aのように、ストレート孔面23を有さなくともよい。この場合でも、3つのシール部S1,S2,S3でシールされることで、冷媒が、管継手10の外部に漏洩することを好適に防ぐことができる。ただし、上記実施の形態1に係る管継手10の場合(ストレート孔面23を有する場合)は、4つのシール部S1,S2,S3,S4でシールされるため、シール能力の観点からは、ストレート孔面23を有する方が好ましい。
また、実施の形態1では、シール部S4を形成するためのストレート孔面23を、管継手本体20が有している。しかしながら、これに限らず、図12A及び図12Bに示す実施の形態3に係る管継手10Bのように、ストレート孔面35を、ナット部材30が有していてもよい。この場合、接続管101の膨出部101aが、管継手本体20のテーパ面22と、ナット部材30のテーパ面34とに挟まれるとともに、ナット部材30のストレート孔面35の内周面に当接することで、シール部S1,S2,S4が形成される。また、ナット部材30のテーパ面36が、管継手本体20のテーパ面22に接合されることで、シール部S3(メタルシール部)が形成される。
Claims (13)
- 接続管が接続される管継手であって、
外周面に雄ネジ部が形成されるとともに、前記接続管が挿入され、前記接続管と接合するための第1接合面を有する第1挿入孔が形成された管継手本体と、
前記雄ネジ部が螺合される雌ネジ部と、前記接続管が挿入され、前記接続管と接合するための第2接合面とを有する第2挿入孔が形成されたナット部材と、
を有し、
径方向に膨らんだ膨出部が形成された前記接続管が接続された場合、
前記管継手本体の前記雄ネジ部が、前記ナット部材の雌ネジ部に螺合されることにより、前記膨出部が、前記第1接合面と前記第2接合面とに挟まれ、
前記膨出部と前記第1接合面との接合部分が、第1シール部を形成するとともに、前記膨出部と前記第2接合面との接合部分が、第2シール部を形成し、
前記管継手本体の端面が、前記ナット部材の前記第2挿入孔の内周面の一部に接合し、第3シール部が形成される管継手。 - 前記管継手本体の端面には、前記ナット部材の前記第2接合面に平行な面の第3接合面が形成され、
径方向に膨らんだ前記膨出部が、端部に形成された前記接続管が接続された場合、前記第3シール部は、前記第3接合面が、前記第2挿入孔の前記第2接合面に接合することにより、形成される請求項1に記載の管継手。 - 前記管継手本体の前記第1挿入孔と、前記ナット部材の前記第2挿入孔とのいずれか一方には、前記管継手本体の軸に平行なストレート孔面を有し、
径方向に膨らんだ前記膨出部が、端部に形成された前記接続管が接続された場合、前記膨出部は、前記ストレート孔面に接合することで、第4シール部が形成される請求項1又は2に記載の管継手。 - 前記ストレート孔面は、前記管継手本体の前記第1挿入孔の開口近傍に形成されている請求項3に記載の管継手。
- 前記第1接合面は、前記管継手本体の軸方向に対して傾斜する傾斜面から構成され、
前記第1接合面の傾斜角度は、43°~47°の範囲にある請求項1乃至4のいずれか一項に記載の管継手。 - 前記第2接合面は、前記ナット部材の軸方向に対して傾斜する傾斜面から構成され、
前記第2接合面の傾斜角度は、43°~47°の範囲にある請求項1乃至5のいずれか一項に記載の管継手。 - 冷凍サイクルの冷媒が流れる接続管と、
前記接続管に接続される請求項1乃至6のいずれか一項に記載の管継手と、
を有する空気調和機。 - 前記冷媒は、ジフルオロメタン(CH2F2)からなるR32である請求項7に記載の空気調和機。
- 径方向に膨らんだ膨出部が形成された接続管の製造方法であって、
管部材を用意することと、
前記管部材の端部に、フランジ部を有する略円柱形状に形成された押圧部材を嵌め込むことと、
前記押圧部材の前記フランジ部で、前記管部材の端部を圧縮して、前記膨出部を形成することと、
を含む接続管の製造方法。 - 接続管本体と、
前記接続管本体の少なくとも一部に形成され、前記接続管本体から径方向に拡がる拡径部と、前記拡径部から径方向に狭まる縮径部と、を有する膨出部と、
を有する接続管。 - 外周面に雄ネジ部が形成されるとともに、前記接続管が挿入され、前記接続管と接合するための第1接合面を有する第1挿入孔が形成された管継手本体と、前記雄ネジ部が螺合される雌ネジ部と、前記接続管が挿入され、前記接続管と接合するための第2接合面とを有する第2挿入孔が形成されたナット部材と、を有する管継手に接続した場合、
前記管継手本体の前記雄ネジ部が、前記ナット部材の雌ネジ部に螺合されることにより、前記膨出部が、前記第1接合面と前記第2接合面とに挟まれ、
前記膨出部と前記第1接合面との接合部分が、第1シール部を形成するとともに、前記膨出部と前記第2接合面との接合部分が、第2シール部を形成し、
前記管継手本体の端面が、前記ナット部材の前記第2挿入孔の内周面の一部に接合し、第3シール部が形成される請求項10に記載の接続管。 - 前記管継手本体の前記第1挿入孔と、前記ナット部材の前記第2挿入孔とのいずれか一方には、前記管継手本体の軸に平行なストレート孔面をさらに有する前記管継手に接続した場合、
前記膨出部は、前記ストレート孔面に接合することで、第4シール部が形成される請求項11に記載の接続管。 - 外周面に雄ネジ部が形成されるとともに、接続管が挿入され、前記接続管と接合するための第1接合面を有する第1挿入孔が形成された管継手本体と、前記雄ネジ部が螺合される雌ネジ部と、前記接続管が挿入され、前記接続管と接合するための第2接合面とを有する第2挿入孔が形成されたナット部材と、を有する管継手と、
径方向に膨らんだ膨出部が形成された前記接続管と、を接続する方法であって、
前記管継手本体の前記雄ネジ部を、前記ナット部材の雌ネジ部に螺合することにより、前記膨出部を、前記第1接合面と前記第2接合面とで挟み、前記膨出部と前記第1接合面との接合部分を、第1シール部に形成するとともに、前記膨出部と前記第2接合面との接合部分を、第2シール部に形成し、
前記管継手本体の端面を、前記ナット部材の前記第2挿入孔の内周面の一部に接合させて、第3シール部を形成する、
接続方法。
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AU2013244568A AU2013244568B2 (en) | 2012-04-02 | 2013-03-07 | Pipe Joint, Air Conditioner, Connecting Pipe, Method for Producing Connecting Pipe and Connection Method |
JP2014509091A JP5968427B2 (ja) | 2012-04-02 | 2013-03-07 | 管継手、空気調和機、接続管、及び接続方法 |
US14/373,424 US9797532B2 (en) | 2012-04-02 | 2013-03-07 | Pipe joint, air conditioner, method for producing connecting pipe, connecting pipe, and connection method |
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JPWO2013150858A1 (ja) | 2015-12-17 |
CN103363208B (zh) | 2016-03-09 |
JP5968427B2 (ja) | 2016-08-10 |
US9797532B2 (en) | 2017-10-24 |
AU2013244568A1 (en) | 2014-08-21 |
EP2835568A1 (en) | 2015-02-11 |
US20150008669A1 (en) | 2015-01-08 |
AU2013244568B2 (en) | 2016-05-12 |
EP2835568A4 (en) | 2016-01-06 |
EP2835568B1 (en) | 2019-07-24 |
CN203162387U (zh) | 2013-08-28 |
CN103363208A (zh) | 2013-10-23 |
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