EP1750072A1 - Rohrverzweigungsverbindung und damit versehene klimaanlage - Google Patents

Rohrverzweigungsverbindung und damit versehene klimaanlage Download PDF

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Publication number
EP1750072A1
EP1750072A1 EP05743857A EP05743857A EP1750072A1 EP 1750072 A1 EP1750072 A1 EP 1750072A1 EP 05743857 A EP05743857 A EP 05743857A EP 05743857 A EP05743857 A EP 05743857A EP 1750072 A1 EP1750072 A1 EP 1750072A1
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EP
European Patent Office
Prior art keywords
branch
pipe
nozzle part
branch nozzle
branching
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.)
Granted
Application number
EP05743857A
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English (en)
French (fr)
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EP1750072B1 (de
EP1750072A4 (de
Inventor
Tadashi Sao
Kazuhide MITZUTANI
Satoru Okura
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Daikin Industries Ltd
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Daikin Industries Ltd
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Publication of EP1750072A1 publication Critical patent/EP1750072A1/de
Publication of EP1750072A4 publication Critical patent/EP1750072A4/de
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Publication of EP1750072B1 publication Critical patent/EP1750072B1/de
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Classifications

    • 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
    • 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
    • F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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 branching pipe joint and an air conditioner provided therewith.
  • FIG. 1 An example of such an air conditioner 1 is one that, as depicted in FIG. 1, disposes a plurality (four units in FIG. 1) of indoor units 3 and branches a connecting piping 4 so that a refrigerant can be distributed therefrom to all indoor units 3, and also disposes a plurality (three units in FIG 1) of outdoor units 2 and branches the connecting piping 4 (a gas refrigerant connecting piping 5 and a liquid refrigerant connecting piping 6 in FIG. 1) so that the refrigerant can be distributed therefrom to all outdoor units 2.
  • a connecting piping such as a gas refrigerant connecting piping and a liquid refrigerant connecting piping
  • the following explains the branch structure of the connecting piping 4 for distributing the refrigerant to the plurality of outdoor units 2 and the plurality of indoor units 3, e.g., the gas refrigerant connecting piping 5 that distributes a gas refrigerant to the plurality of outdoor units 2.
  • the gas refrigerant connecting piping 5 principally comprises: a union connecting piping 51 that extends from the indoor units 3 to the plurality of outdoor units 2; a plurality (two in FIG 1) of branching pipe joints 52 connected to the union connecting piping 51 in accordance with the number of outdoor units 2, and that distribute the flow of the refrigerant to two flows; branch connecting pipings 53 that each conjoin branching pipe joints 52 as needed; and unit branch pipings 54 that each connect one of the branching pipe joints 52 and a connection port 21 of the corresponding outdoor unit 2.
  • Such a gas refrigerant connecting piping 5 is plumbed by connecting one of the branching pipe joints 52 to the union connecting piping 51 by brazing and the like, connecting each unit branch piping 54 to the connection port 21 of the corresponding outdoor unit 2, and connecting each branch connecting piping 53 to the corresponding branching pipe joint 52 by braising and the like.
  • the branch structure of the gas refrigerant connecting piping 5 for distributing the gas refrigerant to the plurality of indoor units 3 is also constituted by connecting branching pipe joints 55, branch connecting pipings 56, and unit branch pipings 57 to the union connecting piping 51, the same as above.
  • the liquid refrigerant connecting piping 6 also has a branch structure that includes branching pipe joints 62, 65, the same as the gas refrigerant connecting piping 5.
  • branchesing pipe joints (the branching pipe joints 52, 55 of the gas refrigerant connecting piping 5 in FIG. 1) used to branch such a connecting piping include a Y-shaped branch pipe 81 and a T-shaped branch pipe 91 depicted in FIG. 2 and FIG. 3.
  • the Y-shaped branch pipe 81 principally comprises a Y-shaped branch part 82, and a first branch nozzle part 83 and a second branch nozzle part 84 connected to the Y-shaped branch part 82.
  • the Y-shaped branch part 82 is a substantially Y-pipe shaped member, and has an inlet pipe part 82a, wherethrough flows the refrigerant that flows in from the union connecting piping or the branch connecting piping (corresponding to the union connecting piping 51 and the branch connecting pipings 53 in FIG.
  • the first branch nozzle part 83 is a pipe member connected to the first outlet pipe part 82b, and extends away from the second branch nozzle part 84 and then along the first direction A; further, at the tip thereof a first reducer pipe connecting part 83 a is formed, wherein the pipe diameter changes in steps so that it can connect to a differently diametered pipe.
  • the second branch nozzle part 84 is a pipe member connected to the second outlet pipe part 82c, and extends substantially straight along the first direction A; further, at the tip thereof a second reducer pipe connecting part 84a is formed, wherein the pipe diameter changes in steps, the same as the first branch nozzle part 83.
  • the unit branch piping corresponding to the unit branch piping 54 in FIG 1
  • the first branch nozzle part 83 can be made to conform to the pipe diameter of the unit branch piping by cutting the first reducer pipe connecting part 83a using a pipe cutter.
  • the branch connecting piping or the unit branch piping to be connected to the second branch nozzle part 84 is a differently diametered pipe, it is still possible to make the connection by brazing and the like because the second branch nozzle part 84 can be made to conform to the pipe diameter of the branch connecting piping or the unit branch piping by cutting the second reducer pipe connecting part 84a using a pipe cutter, the same as the first reducer pipe connecting part 83a.
  • first reducer pipe connecting part 83a and the second reducer pipe connecting part 84a are shaped so that the first branch nozzle part 83 extends away from the second branch nozzle part 84 and then extends along the first direction A, as discussed above, a spacing is created that can secure the space needed to perform the cutting work with the pipe cutter (corresponding to the spacing S between the portion of the first reducer pipe connecting part 83a nearest the second branch nozzle part 84 side and the portion of the second branch nozzle part 84 nearest to the first reducer pipe connecting part 83a of the first branch nozzle part 83 in FIG. 2).
  • the T-shaped branch pipe 91 principally comprises a T-shaped branch part 92, and a first branch nozzle part 93 and a second branch nozzle part 94 connected to the T-shaped branch part 92.
  • the T-shaped branch part 92 is a substantially T-shaped member, and has an inlet pipe part 92a, wherethrough flows the refrigerant that flows in from the union connecting piping or the branch connecting piping (corresponding to the union connecting piping 51 or the branch connecting piping 53 in FIG.
  • the first branch nozzle part 93 is a pipe member connected to the first outlet pipe part 92b, and extends in a direction substantially orthogonal to the first direction A; further, at the tip thereof a first reducer pipe connecting part 93 a is formed, wherein the pipe diameter changes in steps.
  • the second branch nozzle part 94 is a pipe member connected to the second outlet pipe part 92c, and extends substantially straight along the first direction A; further, at the tip thereof, a second reducer pipe connecting part 94a is formed wherein the pipe diameter changes in steps, the same as the first branch nozzle part 93.
  • the unit branch piping corresponding to the unit branch piping 54 in FIG. 1
  • the first branch nozzle part 83 can be made to conform to the pipe diameter of the unit branch piping by cutting the first reducer pipe connecting part 83a using a pipe cutter.
  • the branch connecting piping or the unit branch piping to be connected to the second branch nozzle part 84 is a differently diametered pipe
  • the first branch nozzle part 83 and the second branch nozzle part 84 extend in mutually orthogonal directions, a space is secured between the first reducer pipe connecting part 83a and the second reducer pipe connecting part 84a to perform the cutting work with the pipe cutter.
  • the Y-shaped branch pipe 81 which is the former branch pipe discussed above, is used as the branching pipe joint, then it is normally disposed so that the Y-shaped branch part 82 faces the horizontal direction and so that the first branch nozzle part 83 and the second branch nozzle part 84 are positioned at the same height (hereinafter referred to as the horizontal branch arrangement).
  • the refrigerant that flows in from the union connecting piping or the branch connecting piping into the Y-shaped branch pipe 81 tends not to drift because the refregerant branches in the Y-shaped branch part 82 without any height differential between the directions substantially symmetric to the centerline O-O of the inlet pipe part 82a.
  • first branch nozzle part 83 of the Y-shaped branch pipe 81 extends away from the second branch nozzle part 84 and then extends along the first direction A
  • a heat insulating material 85 (refer to FIG. 2) must be affixed around the portion of the first and second branch nozzle parts 83, 84 where the first branch nozzle part 83 extends away from the second branch nozzle part 84 in the first direction A from the inlet pipe part 82a of the Y-shaped branch part 82, and the vicinity of the branching pipe joint therefore cannot be made compact.
  • the Y-shaped branch pipe 81 is used as the branching pipe joint, then there is a case wherein it is disposed below the connection ports of the corresponding outdoor unit as in the case, for example, where the outdoor unit is installed on a platform.
  • the refrigerant piping, such as the unit branch piping, connected to the first branch nozzle part 83 must be disposed so that it stands upward, and it is consequently preferable to plumb so that the Y-shaped branch pipe 81 is disposed so that the Y-shaped branch part 82 faces the horizontal direction and the first branch nozzle part 83 is on the upper side of the second branch nozzle part 84, instead of the horizontal branch arrangement discussed above.
  • the portion where a heat insulating material 95 is affixed is just the portion in the vicinity of the first and second outlet pipe parts 92b, 92c of the first and second branch nozzle parts 93, 94 in the first direction A from the inlet pipe part 92a of the T-shaped branch part 92 (refer to FIG 3), and the vicinity of the branching pipe joint can be made more compact than the case of using the Y-shaped branch pipe 81.
  • the T-shaped branch pipe 91 is disposed so that it is in the horizontal branch arrangement, the same as the case of using the Y-shaped branch pipe 81, i.e., so that the T-shaped branch part 92 of the T-shaped branch pipe 91 faces the horizontal direction, and is disposed so that the first branch nozzle part 93 and the second branch nozzle part 94 are at the same height position, then the refrigerant that flows in from the union connecting piping or the branch connecting piping into the T-shaped branch pipe 91 branches without any height differential between the directions substantially symmetric to the centerline O-O of the inlet pipe part 82a, but there is a problem in that drift tends to occur in the T-shaped branch part 92 because it does not branch in directions symmetric to the centerline O-O of the inlet pipe part 92a.
  • a branching pipe joint is a branching pipe joint for distributing a refrigerant flowing within a main pipe to two flows, comprising a substantially Y-pipe shaped branch part, a first branch nozzle part, a second branch nozzle part, and a first branch pipe.
  • the branch part comprises an inlet pipe part wherethrough flows the refrigerant that flows in from the main pipe, and a first outlet pipe part and a second outlet pipe part wherethrough flows the refrigerant along a first direction, which is the flow direction of the refrigerant that flows through the inlet pipe part, and along the first direction in directions substantially symmetric to a centerline of the inlet pipe part.
  • the first branch nozzle part is connected to the first outlet pipe part and extends along the first direction.
  • the second branch nozzle part is connected to the second outlet pipe part and extends along the first direction.
  • the first branch pipe is a pipe member, wherein one end part is connected to a tip part of the first branch nozzle during plumbing work, and is bent so that the other end part faces a direction that intersects the first direction in a state connected to the first branch nozzle part.
  • the first branch nozzle part and the second branch nozzle part are disposed so that the spacing between the portion of the tip part of the first branch nozzle part nearest the second branch nozzle part side and the portion of the second branch nozzle part nearest the tip part of the first branch nozzle part is less than or equal to 40 mm.
  • This branching pipe joint comprises a substantially Y-pipe shaped branch part the same as a conventional Y-shaped branch pipe but, unlike the conventional Y-shaped branch pipe, is structured so that the first branch pipe can be connected to the tip part of the first branch nozzle part during plumbing work.
  • this branching pipe joint unlike the conventional Y-shaped branch pipe, does not have a first reducer pipe connecting part formed at the tip part of the first branch nozzle part, and it is therefore not necessary to secure a space to perform the work of cutting the tip part of the first branch nozzle part using a pipe cutter, and the spacing between the first branch nozzle part and the second branch nozzle part (i.e., the spacing between the portion of the first branch pipe of the first branch nozzle part nearest the second branch nozzle part side of the connecting part and the portion of the second branch nozzle part nearest the first branch nozzle part side) is consequently less than or equal to 40 mm.
  • this branching pipe joint it is possible to compact the vicinity of the branch pipe more than the conventional Y-shaped branch pipe.
  • the branching pipe joint is bent so that the other end part thereof faces a direction that intersects the first direction, in a state wherein the first branch pipe is connected to the first branch nozzle part, it is possible to maintain the horizontal branch arrangement of the branch part even if, for example, the refrigerant piping connected to the first branch nozzle part is disposed so that it stands upwards. Thereby, this branching pipe joint can prevent drift of the refrigerant in the branch part.
  • this branching pipe joint is structured so that the first branch pipe, which is bent so that it faces a direction that intersects the first direction, can be connected to the tip part of the first branch nozzle part, and it is possible to achieve both a compaction of the vicinity of the branch part and the prevention of drift therein because the spacing between the first branch nozzle part and the second branch nozzle part is reduced.
  • a branching pipe joint according to the second invention is a branching pipe joint according to the first invention, wherein the first branch pipe is capable of connecting to the first branch nozzle part by brazing.
  • the spacing between the portion of the tip part of the first branch nozzle part nearest the second branch nozzle part side and the portion of the second branch nozzle part nearest to the tip part of the first branch nozzle part is greater than or equal to 7 mm.
  • this branching pipe joint it is possible with this branching pipe joint to easily connect the first branch pipe to the tip part of the first branch nozzle part by brazing during plumbing work because the spacing between the portion of the tip part of the first branch nozzle part nearest the second branch nozzle part side and the portion of the second branch nozzle part nearest the tip part of the first branch nozzle part is greater than or equal to 7 mm.
  • a branching pipe joint according to the third invention is a branching pipe joint according to the first or second inventions, wherein the other end part of the first branch pipe comprises a first reducer pipe connecting part, wherein the pipe diameter changes in steps.
  • a branching pipe joint according to the fourth invention is a branching pipe joint according to any one invention of the first through third inventions, wherein the tip part of the second branch nozzle part comprises a second reducer pipe connecting part that protrudes further than the tip part of the first branch nozzle part toward the first direction side and wherein the pipe diameter changes in steps.
  • this branching pipe joint it is possible with this branching pipe joint to secure a space for performing the work of cutting the second reducer pipe connecting part using a pipe cutter because the second reducer pipe connecting part, which is formed at the tip part of the second branch nozzle part, protrudes further than the tip part of the first branch nozzle part toward the first direction side.
  • a branching pipe joint according to the fifth invention is a branching pipe joint according to any one invention of the first through third inventions, further comprising a second branch pipe.
  • the second branch pipe is a pipe member wherein one end part is connected during plumbing work to the second branch nozzle part, comprising a second reducer pipe connecting part at the other end part wherein the pipe diameter changes in steps, and extending along the first direction in a state connected to the second branch nozzle part.
  • this branching pipe joint it is possible with this branching pipe joint to reduce the size of the branch part in the first direction because it is structured so that the second branch pipe, which extends along the first direction, can connect to the tip part of the second branch nozzle part.
  • An air conditioner comprises: at least one indoor unit; a plurality of outdoor units; a union connecting piping that serves as a main pipe extending from the indoor unit to the plurality of outdoor units; at least one branching pipe joint, according to any one invention of the first through fifth inventions, that is connected to the union connecting piping in accordance with a number of the outdoor units and that distributes the flow of a refrigerant to two flows; and a plurality of unit branch pipings that each connects the branching pipe joint to a connection port of one of the outdoor units.
  • this air conditioner it is possible with this air conditioner to achieve both a compaction of the vicinity of the branch part and the prevention of drift therein because it constitutes a branch structure that distributes the refrigerant from the union connecting piping to the connection port of each outdoor unit using at least one branching pipe joint according to any one invention of the first through fifth inventions.
  • a branch structure that distributes the refrigerant from the union connecting piping to the connection port of each outdoor unit using at least one branching pipe joint according to any one invention of the first through fifth inventions.
  • the structure is such that the first branch pipe, which is bent so that it faces a direction that intersects the first direction, can be connected to the tip part of the first branch nozzle part, and it is possible to achieve both a compaction of the vicinity of the branch part and the prevention of drift therein because the spacing between the first branch nozzle part and the second branch nozzle part is reduced.
  • the second invention it is possible to easily connect the first branch pipe to the connecting part of the first branch nozzle part by brazing during plumbing work because the spacing between the portion of the tip part of the first branch nozzle part nearest the second branch nozzle part side and the portion of the second branch nozzle part nearest the tip part of the first branch nozzle part is greater than or equal to 7 mm.
  • the third invention it is possible to connect a refrigerant piping having a different diameter because the first reducer pipe connecting part is formed in the first branch pipe.
  • the fourth invention it is possible to secure a space for performing the work of cutting the second reducer pipe connecting part using a pipe cutter because the second reducer pipe connecting part, which is formed at the tip part of the second branch nozzle part, protrudes further than the tip part of the first branch nozzle part toward the first direction side.
  • the fifth invention it is possible to reduce the size of the branch part in the first direction because it is structured so that the second branch pipe, which extends along the first direction, can connect to the tip part of the second branch nozzle part.
  • FIG. 4 depicts the structure of a branching pipe joint 181 according to an embodiment of the present invention.
  • the branching pipe joint 181 comprises a substantially Y-pipe shaped branch part 182, a first branch nozzle part 183, a second branch nozzle part 184, and a first branch pipe 186.
  • the branch part 182 is a portion that has a shape the same as a branch part 82 of a conventional Y-shaped branch pipe 81 (refer to FIG. 2), and comprises: an inlet pipe part 182a, wherethrough flows the refrigerant that flows in from the main pipe (e.g., a union connecting piping 51 and a branch connecting piping 53 of a gas refrigerant connecting piping 5 depicted in FIG.
  • the main pipe e.g., a union connecting piping 51 and a branch connecting piping 53 of a gas refrigerant connecting piping 5 depicted in FIG.
  • first outlet pipe part 182b and a second outlet pipe part 182c wherethrough flows the refrigerant along a first direction A, which is the flow direction of the refrigerant that flows through the inlet pipe part 182a and in directions along the first direction A substantially symmetric to a centerline O-O of the inlet pipe part 182a.
  • the first branch nozzle part 183 is connected to the first outlet pipe part 182b, and extends substantially straight along the first direction A. Moreover, at the tip part of the first branch nozzle part 183 a first flared part 183a is formed, wherein the pipe is expanded so that one end part of the first branch pipe 186 can be inserted, and a first reducer pipe connecting part is not formed as in the first branch nozzle part 83 of the conventional Y-shaped branch pipe 81 (refer to FIG. 2).
  • the second branch nozzle part 184 is connected to the second outlet pipe part 182c, and extends substantially straight along the first direction A.
  • a second reducer pipe connecting part 184a is formed, wherein the pipe diameter changes in steps.
  • the second reducer pipe connecting part 184a protrudes further than the tip part (specifically, the first flared part 183a) of the first branch nozzle part 183 toward the first direction A side.
  • the second branch nozzle part 184 has a shape the same as a second branch nozzle part 84 of a conventional Y-shaped branch pipe 81 (refer to FIG. 2).
  • the branching pipe joint 181 of the present embodiment does not need to secure space around the tip part of the first branch nozzle part 183 to perform the work of cutting such using a pipe cutter, and a spacing S between the first branch nozzle part 183 and the second branch nozzle part 184 (i.e., the spacing between the portion of the first flared part 183a of the first branch nozzle part 183 nearest the second branch nozzle part 184 side and the portion of the second branch nozzle part 184 nearest the first flared part 183a of the first branch nozzle part 183) can consequently be reduced to less than or equal to 40 mm.
  • the vicinity of the branch part 182 of the branching pipe joint 181 of the present embodiment can be compacted more that the conventional Y-shaped branch pipe 81 (refer to FIG. 2), the size of the heat insulating material 185 can be reduced when affixing such to the branching pipe joint 181, and the troublesome work when performing the racking process at the outer circumference of the heat insulating material 185 can be reduced.
  • the first branch pipe 186 is a pipe member wherein one end part is connected to the tip part of the first branch nozzle part 183 during plumbing work.
  • the first branch pipe 186 is inserted during plumbing work by approaching the first flared part 183a of the first branch nozzle part 183 from the direction of the arrow B as depicted in FIG. 4, and is connected thereto by brazing.
  • a spacing of at least 7 mm is secured between the portion of the tip part of the first branch nozzle part 183 (specifically, the first flared part 183a) nearest the second branch nozzle part 184 side and the portion of the second branch nozzle part 184 nearest the first flared part 183a.
  • the spacing S between the first branch nozzle part 183 and the second branch nozzle part 184 is set to a dimensional range of greater than or equal to 7 mm and less than or equal to 40 mm so that the vicinity of the branch part 182 can be made compact while ensuring the efficiency of the work of connecting the first branch pipe 186 to the first branch nozzle part 183 by brazing.
  • a first reducer pipe connecting part 186a wherein the pipe diameter changes in steps, is formed at the other end part of the first branch pipe 186. Furthermore, in the state wherein the first branch pipe 186 is connected to the first branch nozzle part 183, the other end part of the first branch pipe 186 is bent so that it faces a direction that intersects the first direction A (in the present embodiment, a direction substantially orthogonal to the first direction A).
  • the first branch pipe 186 in a state wherein the first branch pipe 186 is connected to the first branch nozzle part 183, the other end part is bent so that it faces a direction that intersects the first direction A.
  • the first branch pipe 186 is bent in a direction substantially orthogonal to the first direction A. Consequently, in a state wherein the branch part 182 maintains the horizontal branch arrangement during plumbing work as depicted in FIG. 5 (view taken along the C arrow in FIG 4), the first reducer pipe connecting part 186a of the first branch pipe 186 can be connected to the first branch nozzle part 183 facing a variety of directions (e.g., arrows D, E, F in FIG. 5), and the problem with the conventional Y-shaped branch pipe 81 (refer to FIG. 2), wherein there is an increase in the number of constraints during plumbing work to support the horizontal branch arrangement, tends not to occur.
  • the branching pipe joint 181 of the present embodiment comprises a substantially Y-pipe shaped branch part 182 the same as the conventional Y-shaped branch pipe 81 (refer to FIG. 2); however, unlike the conventional Y-shaped branch pipe 81, it is structured so that the first branch pipe 186 can be connected to the tip part (specifically, the first flared part 183a) of the first branch nozzle part 183 during plumbing work.
  • the branching pipe joint 181 is constituted so that the spacing S between the first branch nozzle part 183 and the second branch nozzle part 184 can be reduced because a first reducer pipe connecting part is not formed at the tip part of the first branch nozzle part 183, unlike the conventional Y-shaped branch pipe 81, and there is therefore no need to secure space for performing the work of cutting the tip part of the first branch nozzle part 183 using the pipe cutter.
  • the vicinity of the branch part 182 can be made more compact than the conventional Y-shaped branch pipe 81.
  • this branching pipe joint 181 in a state wherein the first branch pipe 186 is connected to the first branch nozzle part 183, the other end part of the first branch pipe 186 is bent so that it faces a direction that intersects the first direction A, and it is consequently possible for the branch part 182 to maintain the horizontal branch arrangement even if, for example, the refrigerant piping connected to the first branch nozzle part 183 is disposed so that it stands upward (refer to arrows E, F in FIG. 5). Thereby, it is possible with this branching pipe joint 181 to prevent drift of the refrigerant in the branch part 182.
  • this branching pipe joint 181 is structured so that the first branch pipe 186, which is bent so that it faces a direction that intersects the first direction A, can be connected to the tip part of the first branch nozzle part 183, and the spacing S between the first branch nozzle part 183 and the second branch nozzle part 184 can be reduced; consequently, it is possible to achieve both a compaction of the vicinity of the branch part 182 and the prevention of drift therein.
  • FIG. 6 depicts the branch structure for the case wherein the connecting piping 4 and connection ports 21, 22 of the outdoor units 2 are positioned at the same height.
  • the first branch pipe 186 of each branching pipe joint 181 is connected by brazing to the corresponding first branch nozzle part 183 so that the first reducer pipe connecting part 186a thereof faces toward the corresponding outdoor unit 2 in the horizontal direction (i.e., in the arrow D direction in FIG. 5).
  • each first reducer pipe connecting part 186a is cut using a pipe cutter so that it conforms to the pipe diameter of the corresponding unit branch piping 54, which extends in the horizontal direction and is connected to the connection ports 21, 22 of the plurality of outdoor units 2, and is then connected to the unit branch piping 54 by brazing.
  • each second branch nozzle part 184 is cut using the pipe cutter so that it conforms to the pipe diameter of the corresponding branch connecting piping 53, unit branch piping 54, and the like, and is then connected thereto by brazing.
  • the horizontal branch arrangement of the branching pipe joints 181 is maintained in the branch structure of the connecting piping 4.
  • the connecting piping 4 and the connection ports 21, 22 of the outdoor units 2 are positioned at different heights (e.g., if the connecting piping 4 is positioned lower than the connection ports 21, 22 of the outdoor units 2 by a height H) as depicted in FIG. 7, then it is possible to constitute, as follows, the branch structure of the connecting piping 4 for distributing the refrigerant to the plurality of outdoor units 2.
  • the first branch pipe 186 of the branching pipe joint 181 is connected to the first branch nozzle part 183 by brazing so that the first reducer pipe connecting part 186a thereof faces toward the outdoor unit 2 in the vertically upward direction (i.e., in the arrow E direction in FIG 5).
  • the first reducer pipe connecting part 186a is cut using the pipe cutter so that it conforms to the pipe diameter of the unit branch piping 54, which is connected to the connection ports 21, 22 of the outdoor unit 2 and extends in the horizontal direction and then in the vertically downward direction, and then connected to the unit branch piping 54 by brazing.
  • the second branch nozzle part 184 is cut using the pipe cutter so that it conforms to the pipe diameter of the branch connecting piping 53, the unit branch piping 54, and the like, and is then connected thereto by brazing.
  • the horizontal branch arrangement of the branching pipe joint 181 is maintained even in the branch structure of this connecting piping 4.
  • branching pipe joint 181 of the present embodiment in the branch structure of the connecting piping 4 for distributing the refrigerant to the plurality of outdoor units 2 in an air conditioner 1, it is possible to achieve both a compaction of the vicinity of the branch part 182 and the prevention of drift therein. Thereby, compared with the conventional Y-shaped branch pipe 81, it is possible to reduce the troublesome work when performing the racking process after affixing the heat insulating material 185 to the connecting piping 4.
  • the branching pipe joint 181 discussed above may be structured as depicted in FIG. 8 so that the tip part of the second branch nozzle part 184 is formed as a second flared part 184b, the same as the first flared part 183a of the first branch nozzle part 183, and so that it has a second branch pipe 187, wherein one end part is connected to this second flared part 184b by brazing (refer to the arrow G in FIG. 8).
  • the second branch pipe 187 is a pipe member that extends along the first direction A in a state connected to the second branch nozzle part 184, and at the other end part thereof is formed a second reducer pipe connecting part 187a wherein the pipe diameter changes in steps.
  • the second flared part 184b of the second branch nozzle part 184 protrudes further than the end part of the first flared part 183a of the first branch nozzle part 183 toward the first direction A side, it is possible to ensure good work efficiency when connecting the second branch pipe 187 to the circumference of the second flared part 184b by brazing.
  • branching pipe joint 181 of the present modified example it is possible to reduce the size of the branch part 182 in the first direction A because it is structured so that the second branch pipe 187, which extends along the first direction A, can be connected to the tip part of the second branch nozzle part 184.
  • the branching pipe joint according to the present invention was used in the above embodiments to branch the union connecting piping of the connecting piping to the connection ports of the plurality of outdoor units, but it may be used to branch the union connecting piping of the connecting piping to other units so that, for example, it branches from the union connecting piping of the connecting piping to the connection ports of a plurality of indoor units.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
EP05743857.4A 2004-05-24 2005-05-24 Rohrverzweigungsverbindung und damit versehene klimaanlage Not-in-force EP1750072B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004153056A JP3742933B2 (ja) 2004-05-24 2004-05-24 分岐用管継手及びそれを備えた空気調和装置
PCT/JP2005/009451 WO2005114067A1 (ja) 2004-05-24 2005-05-24 分岐用管継手及びそれを備えた空気調和装置

Publications (3)

Publication Number Publication Date
EP1750072A1 true EP1750072A1 (de) 2007-02-07
EP1750072A4 EP1750072A4 (de) 2014-02-26
EP1750072B1 EP1750072B1 (de) 2018-08-01

Family

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Application Number Title Priority Date Filing Date
EP05743857.4A Not-in-force EP1750072B1 (de) 2004-05-24 2005-05-24 Rohrverzweigungsverbindung und damit versehene klimaanlage

Country Status (8)

Country Link
US (1) US20070113582A1 (de)
EP (1) EP1750072B1 (de)
JP (1) JP3742933B2 (de)
KR (1) KR100813762B1 (de)
CN (1) CN100473922C (de)
AU (1) AU2005246151B2 (de)
ES (1) ES2684380T3 (de)
WO (1) WO2005114067A1 (de)

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EP2813771A4 (de) * 2012-02-09 2016-01-20 Hitachi Appliances Inc Klimaanlage
EP2933571A4 (de) * 2012-12-07 2016-10-12 Daikin Ind Ltd Leitungseinheit für eine klimaanlagenvorrichtung
EP3511647A4 (de) * 2016-09-08 2020-02-26 Daikin Industries, Ltd. Kühlvorrichtung

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WO2011099067A1 (ja) * 2010-02-10 2011-08-18 三菱電機株式会社 冷凍サイクル装置
CN103968589B (zh) * 2010-02-10 2016-05-25 三菱电机株式会社 冷冻循环装置
JP5859220B2 (ja) 2011-04-28 2016-02-10 三菱重工業株式会社 分岐管及び空気調和装置
JP6050670B2 (ja) * 2012-12-07 2016-12-21 ダイキン工業株式会社 空気調和装置の施工方法
JP2014089042A (ja) * 2013-12-25 2014-05-15 Mitsubishi Electric Corp 冷凍サイクル装置
JP6721546B2 (ja) 2017-07-21 2020-07-15 ダイキン工業株式会社 冷凍装置
JP6652115B2 (ja) * 2017-09-29 2020-02-19 ダイキン工業株式会社 配管ユニット又は空調システム
EP3889512A1 (de) * 2017-09-29 2021-10-06 Daikin Industries, Ltd. Klimatisierungssystem
WO2019102517A1 (ja) * 2017-11-21 2019-05-31 日立ジョンソンコントロールズ空調株式会社 分岐配管ユニットおよびそれを用いた空気調和機
CN108533864A (zh) * 2018-03-28 2018-09-14 中山市爱美泰电器有限公司 一种带储液功能的三通
JP7244166B2 (ja) * 2019-04-10 2023-03-22 ダイキン工業株式会社 配管ユニット又は空調システム
KR102231011B1 (ko) * 2020-09-11 2021-03-22 김진수 친환경 및 고효율 공기조화시스템

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Publication number Priority date Publication date Assignee Title
EP2813771A4 (de) * 2012-02-09 2016-01-20 Hitachi Appliances Inc Klimaanlage
US9618218B2 (en) 2012-02-09 2017-04-11 Johnson Controls-Hitachi Air Conditioning Technology (Hong Kong) Limited Air conditioner
EP2933571A4 (de) * 2012-12-07 2016-10-12 Daikin Ind Ltd Leitungseinheit für eine klimaanlagenvorrichtung
EP3511647A4 (de) * 2016-09-08 2020-02-26 Daikin Industries, Ltd. Kühlvorrichtung

Also Published As

Publication number Publication date
ES2684380T3 (es) 2018-10-02
CN1910413A (zh) 2007-02-07
KR100813762B1 (ko) 2008-03-13
AU2005246151B2 (en) 2008-09-04
CN100473922C (zh) 2009-04-01
JP2005337524A (ja) 2005-12-08
KR20060122885A (ko) 2006-11-30
EP1750072B1 (de) 2018-08-01
AU2005246151A1 (en) 2005-12-01
EP1750072A4 (de) 2014-02-26
US20070113582A1 (en) 2007-05-24
JP3742933B2 (ja) 2006-02-08
WO2005114067A1 (ja) 2005-12-01

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