JP2007232286A - Coolant pipe arrangement method - Google Patents

Coolant pipe arrangement method Download PDF

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Publication number
JP2007232286A
JP2007232286A JP2006055164A JP2006055164A JP2007232286A JP 2007232286 A JP2007232286 A JP 2007232286A JP 2006055164 A JP2006055164 A JP 2006055164A JP 2006055164 A JP2006055164 A JP 2006055164A JP 2007232286 A JP2007232286 A JP 2007232286A
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Japan
Prior art keywords
pipe
refrigerant
unit
joint
piping
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JP2006055164A
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Japanese (ja)
Inventor
Jun Fukuyama
Nobuhiko Nakatsu
延彦 中津
潤 福山
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Higashio Mech Co Ltd
Nakatsu:Kk
東尾メック株式会社
株式会社ナカツ
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Priority to JP2006055164A priority Critical patent/JP2007232286A/en
Publication of JP2007232286A publication Critical patent/JP2007232286A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a coolant pipe arrangement method which easily and quickly carries out connection of a coolant pipe arrangement without carrying out brazing work. <P>SOLUTION: A branch pipe arrangement unit 1 comprised by integrating each end of three branch pipe parts 5, 6, 7 having pipe fittings 8 on other ends by a trifurcate merging part 4 is fabricated beforehand. A tip of the coolant pipe arrangement with a base end connected to an outdoor unit is inserted into one pipe fitting 8 of the three pipe fittings 8, and it is connected by mechanical joining. And base ends of a coolant pipe arrangement with a tip to be connected to one or more indoor units are inserted into the remaining two pipe fittings 8, 8, and they are connected by mechanical joining. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a refrigerant piping method.

Conventionally, there is an air conditioner in which a plurality of indoor units are connected to one outdoor unit by refrigerant piping, and the refrigerant piping, one end of which is connected to the outdoor unit, is branched into a trifurcated shape on the way to each indoor unit. It was arranged in the machine.
As a conventional method for constructing such a refrigerant pipe, a T-shaped or Y-shaped branch pipe prepared in advance is arranged at a planned branch position of the refrigerant pipe, and one end of the branch pipe is connected outdoors. There is a method of brazing and connecting to the end of the refrigerant pipe connected to the machine, and connecting the remaining two ends of the branch pipe to the end of the refrigerant pipe to be connected to the indoor unit. (See Patent Document 1).

  Conventionally, an airtight test for checking whether the airtightness of the refrigerant pipe is maintained has been performed. For example, an airtight test for simultaneously checking the airtightness of the liquid pipe for the liquid refrigerant and the gas pipe for the gas refrigerant. There is. Specifically, in order to inject nitrogen gas, an airtight test apparatus having a liquid side conduit connected to the liquid pipe and a gas side conduit connected to the gas pipe is prepared, and the base end is connected to the outdoor unit. The liquid-side conduit and the gas-side conduit are brazed and connected to the tip of the liquid tube and the gas tube, and after the test, the brazed portion was cut and the airtight test device was removed (see Patent Document 2) ).

In addition, the refrigerant piping of the air conditioner is screwed to the flare male screw attached to the indoor unit side with a flare nut (see Patent Document 3), but is changed to a new refrigerant when replacing the indoor unit. If this is the case, it will be necessary to replace the existing flare nut with one that is suitable for strength and dimensions. The replacement work at this time is to remove the existing flare nut from the flare male screw, cut the refrigerant pipe to a predetermined size and remove it together with the flare nut, and attach the flare nut to one end of the pipe that has been flared in advance. Place the prepared renewal pipe (not shown) at the removed location, screw the flare nut on one end of the flare male screw, and braze the other end to the cut end of the existing refrigerant pipe. Connected.
JP 2005-337524 A JP 10-197112 A JP 2003-254564 A

However, both the piping work for newly installing or renewing the conventional refrigerant piping and the piping work for the conventional airtight test must be connected by brazing, and the connecting work takes time. In addition to being troublesome, there was also a risk of fire.
Further, the above airtight test apparatus has a drawback that the brazing portion is cut and removed after the test is completed, so that the liquid side conduit and the gas side conduit are shortened every use and cannot be used many times.

  Then, an object of this invention is to provide the refrigerant | coolant piping method which can connect a refrigerant | coolant piping easily and rapidly, without performing a brazing operation | work.

  In order to achieve the above object, a refrigerant piping method according to the present invention includes a branch piping unit in which the other ends of three branch pipe portions each having a pipe joint at one end are integrated at a trifurcated junction. The tip of the refrigerant pipe whose base end is connected to the outdoor unit is inserted into one of the three pipe joints and connected by mechanical coupling, and the remaining two pipes are connected. A base end portion of a refrigerant pipe scheduled to be connected to one or more indoor units is inserted into the joint and connected by mechanical coupling.

  A branch pipe unit having one end of three or more branch pipes connected to a main pipe whose one end is closed and having a pipe joint at the other open end of the main pipe and the other end of each of the branch pipes; Produced in advance, and inserted into the pipe joint of the main pipe with a distal end portion of a refrigerant pipe having a base end connected to an outdoor unit and connected by mechanical coupling, and each pipe joint of the branch pipe has one or more distal ends. The base ends of the refrigerant pipes to be connected to the indoor unit are inserted one after another and connected by mechanical coupling.

  In the refrigerant piping method for an airtight test, a first short pipe having a liquid pipe joint at one end to be connected to the refrigerant liquid pipe and a gas pipe joint to be connected to the refrigerant gas pipe are provided. A second short pipe at one end, a communication pipe for connecting and connecting the first short pipe and the second short pipe, one end connected to the first short pipe or the second short pipe, and a test pressure injection unit And a pressure measuring unit having a pressure gauge mounting portion at the other end are prepared in advance, the predetermined positions of the existing liquid pipe and gas pipe for refrigerant are cut, and the pressure gauge is previously attached to the pressure gauge. The pipe joint for liquid and the pipe joint for gas of the pressure measuring unit attached to the section are connected to the cut end of the liquid pipe and the cut end of the gas pipe by mechanical coupling.

  In the refrigerant piping method for an airtight test, a first short pipe having a liquid pipe joint at one end to be connected to the refrigerant liquid pipe and a gas pipe joint to be connected to the refrigerant gas pipe are provided. A second short pipe at one end, a communication pipe for connecting and connecting the first short pipe and the second short pipe, one end connected to the first short pipe or the second short pipe, and a test pressure injection unit A pressure measuring unit having a pressure gauge mounting portion at the other end, and a pressure fitting unit for gas and a gas pipe for the pressure measuring unit in which a pressure gauge is previously attached to the pressure gauge mounting portion. The joint is connected by mechanical coupling to the distal end of the liquid pipe whose base end is connected to the outdoor unit and the distal end of the gas pipe whose base end is connected to the outdoor unit.

In addition, a renewed piping unit having a predetermined length having a flare processing portion and a cap nut rotatably attached to the flare processing portion at the distal end and having a pipe joint at the base end is prepared in advance. Remove the existing cap nut from the flare male screw of the existing indoor unit, cut and remove the existing refrigerant pipe of the specified length, and insert the cut end of the remaining refrigerant pipe into the fitting of the renewal pipe unit. In addition to the connection by mechanical coupling, the cap nut of the renewal piping unit is screwed and connected to the flare male screw of the existing indoor unit.
Moreover, the heat insulating material may be previously attached to the outer peripheral surface of the renewal piping unit.

The present invention has the following remarkable effects.
According to the refrigerant piping method of the present invention, the pipe joint (liquid pipe joint / gas pipe joint) of the branch pipe unit (pressure measurement unit / renewal pipe unit) is simply connected to the end of the refrigerant pipe. And the piping work efficiency can be remarkably improved. That is, it is possible to perform the connection work quickly without the need for brazing as in the prior art. Moreover, piping work can be performed safely without fear of fire. Furthermore, there will be no problems such as fire alarm malfunction during construction.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
FIG. 22 is a schematic configuration diagram of an air conditioner in which one outdoor unit 32 and a plurality of indoor units 9 are connected by a refrigerant pipe 10. The refrigerant pipe 10 is composed of a liquid pipe L for liquid refrigerant and a gas pipe G for gas refrigerant, and the gas pipe G is formed thicker than the liquid pipe L. The liquid pipe L and the gas pipe G are both connected to the outdoor unit 32 at the base end, branched in a trifurcated shape in the middle, and arranged at the tip to communicate with the indoor units 9.
The refrigerant piping method according to the present invention to be described first is a refrigerant pipe 10 (liquid pipe L / gas pipe G) branched in the middle of one outdoor unit 32 and a plurality of indoor units 9 as shown in FIG. In the case of newly connecting an air conditioner by communicating with each other, or the refrigerant pipe 10 (liquid pipe L / gas pipe G) branched in the existing air conditioner as shown in FIG. This is a piping method when the pipe 10 is replaced (renewed).

First, FIG. 1 shows a branch pipe unit 1, and the branch pipe unit 1 has three branch pipe portions 5, 6, and 7. One end of each of the three branch pipe parts 5, 6, 7 has a pipe joint 8, and the other end of each of the branch pipe parts 5, 6, 7 is integrated at the trifurcated junction part 4. It is connected and connected. Further, the branch pipe portions 5, 6, and 7 are constituted by pipe bodies 53, 54, and 55 and pipe joints 8 attached to the tips of the pipe bodies 53, 54, and 55, respectively.
And this branch piping unit 1 is produced previously.

2-5, the arrangement | positioning procedure of the refrigerant | coolant piping 10 which uses the said branch piping unit 1 is demonstrated. In addition, since the arrangement | positioning procedure of the liquid pipe L and the arrangement | positioning procedure of the gas pipe G are performed in the same procedure, only the case of the liquid pipe L is demonstrated and description in the case of the gas pipe G is omitted.
In FIG. 2, an outdoor unit 32 is installed at a desired location (outdoors), and a liquid pipe L (the base end) is connected to the outdoor unit 32. Further, the distal end portion 12 of the liquid pipe L connected to the outdoor unit 32 is disposed at a desired planned branch position.

  Then, as shown in FIGS. 3 to 5, the branch pipe unit 1 (1a) is arranged at a desired planned branch position, and one pipe among the three pipe joints 8 of the branch pipe unit 1 (1a). Insert the distal end portion 12 of the refrigerant pipe 10 whose proximal end is connected to the outdoor unit 32 into the joint 8 and connect it by mechanical coupling. The distal end of the remaining two pipe joints 8 and 8 (one or more ) Insert the base end portions 13 and 14 of the liquid pipe L to be connected to the indoor unit 9 and connect them by mechanical coupling.

  Specifically, in FIG. 3, the branch pipe unit 1a prepared in advance is arranged at the planned branch position, and the tip 12 of the refrigerant pipe 10 is inserted into the pipe joint 8 of the branch pipe part 5 of the branch pipe unit 1a. Connected by mechanical coupling.

  In FIG. 4, the base end portion 13 of the liquid pipe L whose tip is to be connected to the indoor unit 9a is inserted into the pipe joint 8 of the branch pipe portion 6 and connected by mechanical coupling. Further, the base end portion 14 of the liquid pipe L whose tip is to be connected to another indoor unit 9b, 9c (see FIG. 5) is inserted into the pipe joint 8 of the branch pipe portion 7 and connected by mechanical coupling. . In this case, the indoor units 9b and 9c are connected to the tip of the liquid pipe L connected to the pipe joint 8 of the branch pipe portion 7 via another branch pipe unit 1b.

In FIG. 5, the distal end portion 12 of the liquid pipe L whose base end is connected to the branch pipe portion 7 of the branch pipe unit 1a is inserted into the pipe joint 8 of the branch pipe portion 5 of another branch pipe unit 1b. Connect by mechanical coupling. Then, the base end portion 13 of the liquid pipe L whose tip is to be connected to the indoor unit 9b is inserted into the pipe joint 8 of the branch pipe portion 6 of the branch pipe unit 1b and connected by mechanical coupling. The base end portion 14 of the liquid pipe L whose tip is to be connected to the indoor unit 9c is inserted into the pipe joint 8 of the branch pipe portion 1b and connected by mechanical coupling.
In the above-described embodiment, as illustrated in FIG. 5, the case where three indoor units 9 and two branch piping units 1 are installed has been described. However, the number of indoor units 9 and the number of branch piping units 1 are described. Is not limited to these and can be changed freely.

  The configuration and action of the pipe joint 8 will be specifically described. As shown in FIG. 8, the pipe joint 8 includes a joint body 34 and a retainer 35. The joint body 34 includes a short cylindrical body 36 having a female thread portion 38 on the inner peripheral surface of the tip, and a fixing member 37 that is rotatably connected to the short cylindrical body 36 via a retaining means 39. Has been. Further, the cylindrical retainer 35 has a male threaded portion 40 formed so as to be screwed into the female threaded portion 38 of the short cylindrical body 36, and a plurality of small disk connecting bodies for preventing piping from being removed. 41. The small disk continuous body 41 is rotatably embedded in the main body portion 35a of the retainer 35, and has a flange portion 47 at the tip of the retainer 35. The female screw portion 38 has a parallel female screw portion 45 and a tapered female screw portion 46 sequentially from the base end side toward the distal end side.

On the inner peripheral surface of the fixing member 37, an annular stopper 44 and two annular concave grooves 43, 43 are provided. The pipe body 53 (54, 55) of the branch pipe portion 5 (6, 7) is inserted into the base end of the fixing member 37, and the distal end surface of the pipe body 53 (54, 55) is in contact with the stopper 44. In addition, ring-shaped sealing materials 42 are mounted in the respective annular concave grooves 43, 43.
In addition, since the structure of each pipe joint 8 of the branch pipe parts 6 and 7 is the same as that of the pipe joint 8 of the said branch pipe part 5, description is abbreviate | omitted.

  Then, the piping work for connecting the pipe joint 8 and the distal end portion 12 (base end portions 13 and 14) of the existing liquid pipe L (refrigerant piping 10) is performed as shown in FIG. Is passed through the hole of the retainer 35 and inserted into the short cylindrical body 36 and the fixing member 37, and the end surface of the tip 12 is brought into contact with the stopper 44 and positioned.

Then, the retainer 35 is inserted into the gap between the female thread portion 38 of the short cylinder 36 and the refrigerant pipe 10. When only the short cylinder 36 is rotated, the retainer 35 is screwed (into the short cylinder 36), and the small disk connecting body 41 of the retainer 35 rotates while biting into the outer peripheral surface of the refrigerant pipe 10. That is, as shown in FIG. 9, the small disk connecting body 41 rolls a spiral bite mark (screw) while planetarily rotating the outer peripheral surface of the refrigerant pipe 10. Then, the flange portion 47 of the retainer 35 that rotates is brought into contact with the distal end surface of the short cylinder 36 and positioned, and the distal end portion 12 of the refrigerant pipe 10 is connected to the pipe joint 8 by mechanical coupling.
4 or 5, the connection method between the base end portions 13 and 14 of the liquid pipe L and the pipe joints 8 of the branch pipe portions 6 and 7 is the same as that of the distal end portion 12 of the liquid pipe L. Since it is the same as the connection method with the pipe joint 8 of the branch pipe part 5, description is abbreviate | omitted.

Moreover, although the said refrigerant | coolant piping method demonstrated the newly installed piping method which newly installs the outdoor unit 32 and the indoor unit 9, and arrange | positions the refrigerant | coolant piping 10, leaving the existing outdoor unit 32 and the indoor unit 9, Since the renewal piping method in which the entire piping 10 is replaced with a new one may be performed in the same manner, the description is omitted.
In addition, although the said branch piping unit 1 is formed in the substantially Y shape, it may be T-shaped or other shapes. In addition, when the branch pipe unit 1 is prepared in advance, a heat insulating material is attached to the outer peripheral surface of the branch pipe unit 1 (the branch pipe portions 5, 6, 7 and the junction portion 4) at the same time or after that (winding). ) Is also preferable.

Next, the refrigerant | coolant piping method which uses the branch piping unit of another form is demonstrated.
FIG. 6 shows a branch pipe unit 11 having a form different from that of the above-described branch pipe unit 1, and this branch pipe unit 11 has three or more branch pipes on a main pipe 73 (an outer peripheral surface) having a closed end. It is a header-type branch pipe in which one end of 74 is connected in communication, and further has a pipe joint 88 at the other end of the main pipe 73 and the other end of each branch pipe 74.
And this branch piping unit 11 is produced beforehand.

Hereinafter, the arrangement procedure of the refrigerant pipe 10 using the branch pipe unit 11 will be described. In addition, since the arrangement | positioning procedure of the liquid pipe L and the arrangement | positioning procedure of the gas pipe G are performed in the same procedure, the liquid pipe L and the gas pipe G are collectively demonstrated as the refrigerant | coolant piping 10. FIG.
In FIG. 7, the refrigerant pipe 10 (the base end) is connected to an outdoor unit 32 installed at a desired location. The tip 12 of the refrigerant pipe 10 is arranged at the planned branch position, the branch pipe unit 11 prepared in advance is arranged at the planned branch position, and the tip 12 of the refrigerant pipe 10 is connected to the main pipe 73 of the branch pipe unit 11. It is inserted into the pipe joint 88 and connected by mechanical coupling. And the base end part 13 of the refrigerant | coolant piping 10 by which a front-end | tip will be connected with the indoor unit 9 (one or more) is inserted in the pipe joint 88 of each branch pipe 74, and it connects by mechanical coupling.
The mechanical coupling between the pipe joint 88 of the branch pipe unit 11 and the distal end portion 12 and the proximal end portion 13 of the refrigerant pipe 10 is the same as that described with reference to FIGS. . Further, since the renewal piping method may be performed in the same manner, the description is omitted. In addition, when the branch pipe unit 11 is manufactured in advance, it is also preferable to attach (wind) a heat insulating material to the outer peripheral surface of the branch pipe unit 11 (main pipe 73 or branch pipe 74) at the same time or thereafter.

A refrigerant piping method for an airtight test will be described with reference to FIGS.
First, a pressure measurement unit 2 as shown in FIG. 10 is prepared in advance. This pressure measuring unit 2 includes a first short pipe 21 having a liquid pipe joint 81 to be connected to the liquid pipe L at one end, and a second short pipe having a gas pipe joint 82 to be connected to the gas pipe G at one end. 22 and a U-shaped communication pipe 16 that connects the first short pipe 21 and the second short pipe 22 in communication. Further, the pressure measuring unit 2 includes a measuring tube 19 having one end connected to the second short tube 22 and having a test pressure injection portion 17 and a pressure gauge mounting portion 18 at the other end.

The liquid pipe joint 81 and the gas pipe joint 82 are attached to one end of each pipe body 91, 92 of the first short pipe 21 and the second short pipe 22, and the communication pipe 16 is connected to each pipe body 91, It is connected to the other end of 92. Specifically, both ends of the communication pipe 16 are inserted into the other end openings (on the left side) of the pipe bodies 91, 92, and the other end openings of the pipe bodies 91, 92 are pinched and closed, Furthermore, it is brazed and connected.
Note that one end of the measurement tube 19 may be connected to the pipe body 91 of the first short tube 21 by pinching and brazing.

In FIG. 11, in the existing liquid pipe L and gas pipe G, a predetermined cutting position A is set for an airtight test, and the cutting position A is cut with a pipe cutter or the like. Thus, the cut ends 24 and 25 are formed in the liquid pipe L and the gas pipe G, respectively.
A pressure gauge 23 is attached to the pressure gauge mounting portion 18 of the pressure measurement unit 2 prepared in advance, and the liquid pipe joint 81 and the gas pipe joint 82 are connected to the cut end of the liquid pipe L as shown in FIG. The part 24 is connected to the cut end 25 of the gas pipe G by mechanical coupling. In this case, it connects to the cut ends 24 and 25 on the left side. The structure and operation of the liquid pipe joint 81 and the gas pipe joint 82 are the same as those of the pipe joint 8 described with reference to FIGS.
In this case, although not shown in FIG. 13, the liquid pipe L and the gas pipe G on the right side of the cut portion are shifted so as not to hinder the connection of the pressure measuring unit 2.

Also, a nitrogen gas cylinder 50 with a valve 48 and a hose 49 attached thereto is prepared, and the tip of the hose 49 is connected to the test pressure injection unit 17 of the pressure measuring unit 2. The valve 48 is opened, nitrogen gas is injected into the liquid pipe L and the gas pipe G, and when a predetermined pressure is reached, the valve 48 is closed and left for a predetermined time. Then, after a predetermined time elapses, it is confirmed by the pressure gauge 23 whether the pressure has decreased.
When the pressure is not lowered, it can be determined that the airtightness is maintained. When the pressure is lowered, the leaked portion of the liquid pipe L / gas pipe G is searched and repaired.

  When the airtight test is completed, the liquid pipe joint 81 and the gas pipe joint 82 are removed from the cut ends 24 and 25 of the liquid pipe L and the gas pipe G. Specifically, in FIG. 9, when the short cylindrical body 36 of the liquid pipe joint 81 and the gas pipe joint 82 is rotated (reversely to the case of connection), the retainer 35 is screwed (to the right). The mechanical coupling is released (see FIG. 8).

  In addition, after the airtight test is finished, both the cut ends 24 and 24 of the liquid pipe L and the both cut ends 25 and 25 of the gas pipe G are connected to the pipe joints at both ends as shown in FIG. The coupling member 51 having 52 and 52 is connected through the interposition. The pipe joint 52 has the same configuration as that of the pipe joint 8 shown in FIGS. 8 and 9, and the cut end portions 24 and 25 are inserted into the pipe joint 52 and connected by mechanical coupling.

Further, another refrigerant piping method for an airtight test will be described. The refrigerant piping method in this case is a case where an outdoor unit 32, an indoor unit 9, and a refrigerant pipe 10 are newly installed, or an existing outdoor unit 32 and an indoor unit 9 are installed. This is a piping method in which only the refrigerant pipe 10 is renewed while leaving
First, the pressure measurement unit 2 is prepared in advance, and the pressure gauge 23 is attached to the pressure gauge mounting portion 18 of the pressure measurement unit 2.
In FIG. 13, a liquid pipe L and a gas pipe G of a predetermined length are connected to an outdoor unit 32 installed outdoors, and the tip portions 75 and 76 of the liquid pipe L and the gas pipe G are connected to a pressure measuring unit. It is inserted into the liquid pipe joint 81 and the gas pipe joint 82 and connected by mechanical coupling. Then, after injecting nitrogen gas into the liquid pipe L and the gas pipe G and confirming whether or not there is a leak after a predetermined time has elapsed, the liquid pipe is connected to the liquid pipe L and the distal ends 75 and 76 of the gas pipe G. The joint 81 and the gas pipe joint 82 are removed.

Although not shown in the drawings, the liquid pipe L and the gas pipe G from which the pressure measuring unit 2 has been removed are connected to the tip portions 75 and 76 of another liquid pipe L and gas pipe G having a predetermined length, respectively, and added. The pressure measurement unit 2 is attached to each end of the liquid pipe L and the gas pipe G, and an airtight test is performed in the same manner as described above. In this way, all the liquid pipes L and gas pipes G are disposed while repeating the work of adding the liquid pipes L and gas pipes G of a predetermined length and the airtight test.
As shown in FIG. 13, when an airtight test is performed on the liquid pipe L and the gas pipe G that are branched at a plurality of locations, the end of the liquid pipe L and the gas pipe G to which the pressure measuring unit 2 is attached. The other end is in a closed state.

A case (method) in which a part of the cap nut and refrigerant pipe connected to the existing indoor unit is replaced (renewed) with a new cap nut and refrigerant pipe will be described with reference to FIGS.
First, the renewal piping unit 3 having a predetermined length shown in FIG. 15 is prepared in advance. This renewal piping unit 3 has a pipe body 56 having a flared portion 26 at the distal end, and a cap nut 27 that is rotatably attached to the flared portion 26, and a pipe joint at the proximal end of the pipe body 56. 83 is attached.

In FIG. 16, the existing indoor unit 9 is provided with flare male screws 28 and 28 for connecting the liquid pipe L and the gas pipe G, and is attached to one end of the existing liquid pipe L and one end of the gas pipe G. Cap nuts 30, 30 that are rotatably attached to each other are screwed and connected to the respective flare male screws 28, 28.
The cap nut 30 is removed from the flare male screw 28 of the indoor unit 9, and the liquid pipe L and the gas pipe G having a predetermined length are cut and removed together with the cap nut 30. As shown in FIG. 17, cut ends 29 and 29 are formed in the remaining liquid pipe L and gas pipe G, respectively.

  In FIG. 18, the renewal piping unit 3 is installed at the position where the liquid pipe L and the gas pipe G are cut and removed. The cut ends 29 and 29 are inserted into the pipe joints 83 and 83 of the renewal piping units 3 and 3 and connected by mechanical coupling, and the cap nuts 27 and 27 of the renewal piping units 3 and 3 are connected to the flare male screw. Screw on 28, 28 to connect. The configuration / action of the pipe joint 83 is the same as the configuration / action of the pipe joint 8 already described with reference to FIGS.

Further, before the renewal piping unit 3 is connected to the indoor unit 9 and the liquid pipe L and the gas pipe G, a heat insulating material 31 may be provided on the outer peripheral surface of the renewal piping unit 3 in advance (FIG. 19). reference).
As shown in FIG. 19, the heat insulating material 31 is attached to the outer peripheral surface of the pipe body 56. For example, the heat insulating material 31 includes two semi-cylindrical divided bodies 57 and 57, and the outer periphery of the pipe body 56. Is attached so as to surround. Although not shown, the heat insulating material 31 is a tape-like member and may be wound around the pipe body 56.

20 and 21 show other embodiments of the pipe joint 8, the pipe joint 88, the liquid pipe joint 81, the gas pipe joint 82, and the pipe joint 83. explain. The configuration and action of the pipe joint 8 and the construction and action of the pipe joint 88, the liquid pipe joint 81, the gas pipe joint 82, and the pipe joint 83 are the same. .
In FIG. 20, the pipe joint 8 includes a joint body 60 having a male screw portion 62 and a cap nut 61 screwed onto the male screw portion 62. An annular groove 64 is formed on the inner peripheral surface of the tip of the cap nut 61, and a ring-shaped sealing material 63 is attached to the groove 64. Further, on the inner peripheral surface of the cap nut 61, there are a female screw portion 65 that is screwed into the male screw portion 62 of the joint body 60, and a tapered portion 66 that has a diameter increasing from the distal end toward the proximal end. ing.

  The joint body 60 includes an outer fitting cylinder portion 67 and an inner fitting cylinder portion 68 that are inserted into the refrigerant pipe 10 (liquid pipe L / gas pipe G) and are held in an outer fitting / inner fitting shape. A circumferential groove 69 is formed on the outer peripheral surface of the inner fitting cylinder portion 68 to reduce the diameter of the refrigerant pipe 10 in the inner diameter direction. The outer circumferential surface of the outer fitting cylinder portion 67 is provided with the cap nut 61. A tapered outer surface portion 70 that abuts the tapered portion 66 is provided (see FIG. 21).

  Further, the pipe joint 8 is provided with a C-shaped retaining ring 71 having a single cut in the circumference in the cap nut 61, and the retaining ring 71 is rotatably attached to a plurality of rotors. Has 72.

The operation of the pipe joint 8 will be described. First, in FIG. 20, the end of the refrigerant pipe 10 is passed through the hole of the cap nut 61, and the outer fitting cylinder portion 67 and the inner fitting cylinder of the fitting main body 60 are passed. Insert between part 68. Next, as the cap nut 61 is rotated and screwed toward the joint body 60, the rotor 72 of the retaining ring 71 rotates and revolves around the outer peripheral surface of the refrigerant pipe 10. Further, when the cap nut 61 is screwed, the retaining ring 71 gradually decreases in diameter while rotating the outer peripheral surface of the refrigerant pipe 10, and the refrigerant pipe 10 is reduced in an annular shape as shown in FIG. Plastically deform. In this way, the pipe joint 8 and the refrigerant pipe 10 are connected by mechanical coupling.
Further, in this case, since the retaining ring 71 rotates slower than the rotation speed of the cap nut 61, it can be firmly connected with a very small rotational torque of the cap nut 61.

  The pipe joint 8, the pipe joint 88, the liquid pipe joint 81, the gas pipe joint 82, and the pipe joint 83 are not limited to the above-described embodiment, and may be any pipe joint that can be connected by mechanical coupling, for example. In FIG. 8, the design can be freely changed to another shape such as one sealing material 42.

  As described above, the refrigerant pipe method of the present invention is a branch pipe formed by integrating the other end of each of the three branch pipe portions 5, 6, 7 having the pipe joint 8 at one end at the trifurcated junction portion 4. The unit 1 is manufactured in advance, and the distal end portion 12 of the refrigerant pipe 10 whose base end is connected to the outdoor unit 32 is inserted into one of the three pipe joints 8 and connected by mechanical coupling. Since the base end portions 13 and 14 of the refrigerant pipe 10 to be connected to one or more indoor units 9 are inserted into the remaining two pipe joints 8 and 8 and connected by mechanical coupling, branching occurs. The pipe joint 8 of the pipe unit 1 can be easily connected and installed to the distal end portion 12 of the refrigerant pipe 10 and the base end portions 13 and 14 of the refrigerant pipe 10, and the efficiency of the piping work can be significantly improved. That is, it is possible to perform the connection work quickly without the need for brazing as in the prior art. There is no risk of fire. Furthermore, there will be no problems such as fire alarm malfunction during construction. Conventionally, in the case of brazing, there has been a problem that the connection accuracy and quality vary depending on the technique of the operator. However, in the present invention, since the connection is made by mechanical coupling by the pipe joint 8, the connection accuracy and quality are made uniform. be able to.

  One end of three or more branch pipes 74 is connected to the main pipe 73 whose one end is closed, and a branch having a pipe joint 88 at the other end of the main pipe 73 and the other end of each of the branch pipes 74. The pipe unit 11 is prepared in advance, and the distal end portion 12 of the refrigerant pipe 10 whose base end is connected to the outdoor unit 32 is inserted into the pipe joint 88 of the main pipe 73 and connected by mechanical coupling, and each pipe of the branch pipe 74 is connected. Since the base end portion 13 of the refrigerant pipe 10 scheduled to be connected to one or more indoor units 9 at one end is inserted into the joint 88 one after another and connected by mechanical coupling, the pipe joint 88 of the branch pipe unit 11 is connected to the refrigerant. The pipe 10 can be easily connected to the distal end 12, and each pipe joint of the branch pipe 74 can be easily connected to the proximal end 13 of the refrigerant pipe 10. As a result, the efficiency of piping work can be significantly improved. That is, it is possible to perform the connection work quickly without the need for brazing as in the prior art. There is no risk of fire. Furthermore, there will be no problems such as fire alarm malfunction during construction. Conventionally, in the case of brazing, there has been a problem that the connection accuracy and quality varies depending on the technique of the operator. However, in the present invention, since the connection is made by mechanical coupling by the pipe joint 88, the connection accuracy and quality are made uniform. be able to.

  In the refrigerant piping method for an airtight test, the first short pipe 21 having a liquid pipe joint 81 to be connected to the refrigerant liquid pipe L at one end and the gas to be connected to the refrigerant gas pipe G One end of the second short pipe 22 having the pipe joint 82 at one end, the communication pipe 16 that connects the first short pipe 21 and the second short pipe 22 in communication, and one end of the first short pipe 21 or the second short pipe 22 A pressure measuring unit 2 having a test pressure injection part 17 and a measuring pipe 19 having a pressure gauge mounting part 18 at the other end, which are connected in communication, is prepared in advance, and an existing refrigerant liquid pipe L / gas pipe G is prepared. The liquid pipe L 81 and the gas pipe 82 of the pressure measuring unit 2 in which the pressure gauge 23 is previously attached to the pressure gauge mounting portion 18 are cut off at the end 24 of the liquid pipe L and the gas pipe. Since it is connected to the cut end 25 of G by mechanical coupling, the liquid pipe joint 81 and the gas pipe joint 82 of the pressure measuring unit 2 are connected to the cut end 24 of the liquid pipe L and the gas pipe G. Can be installed to easily connect to the cut ends 25, the efficiency of the refrigerant piping work for airtight test can be remarkably improved. That is, it is possible to perform the connection work quickly without the need for brazing as in the prior art. Further, the pressure measuring unit 2 can be used many times by removing the liquid pipe joint 81 and the gas pipe joint 82 from the respective cut ends 24 and 25 without fear of fire. Furthermore, there will be no problems such as fire alarm malfunction during construction.

  In the refrigerant piping method for an airtight test, the first short pipe 21 having a liquid pipe joint 81 to be connected to the refrigerant liquid pipe L at one end and the gas to be connected to the refrigerant gas pipe G One end of the second short pipe 22 having the pipe joint 82 at one end, the communication pipe 16 that connects the first short pipe 21 and the second short pipe 22 in communication, and one end of the first short pipe 21 or the second short pipe 22 A pressure measurement unit 2 having a test pressure injection part 17 and a measurement pipe 19 having a pressure gauge attachment part 18 at the other end is connected in advance and a pressure gauge 23 is attached to the pressure gauge attachment part 18 in advance. The liquid pipe joint 81 and the gas pipe joint 82 of the pressure measuring unit 2 are connected to the outdoor pipe 32 at the distal end 75 and the base pipe of the liquid pipe L connected to the outdoor unit 32. Therefore, the liquid pipe joint 81 and the gas pipe joint 82 of the pressure measuring unit 2 can be easily connected to the liquid pipe L tip 75 and the gas pipe G tip 76. Connect can be installed, the efficiency of the refrigerant piping work for airtight test can be remarkably improved to. That is, it is possible to perform the connection work quickly without the need for brazing as in the prior art. If the liquid pipe 81 and the gas pipe 82 are removed from the end portions 75 and 76 of the liquid pipe L and the gas pipe G without any fear of fire, the pressure measuring unit 2 can be used many times. Can do. Furthermore, there will be no problems such as fire alarm malfunction during construction.

  Further, the renewed piping unit 3 having a predetermined length having a flare processing portion 26 and a cap nut 27 rotatably attached to the flare processing portion 26 at the distal end and having a pipe joint 83 at the base end. Prepared in advance, removes the existing cap nut 30 from the flare male screw 28 of the existing indoor unit 9, cuts and removes the existing refrigerant pipe 10 of a predetermined length, and renews the cut end portion 29 of the remaining refrigerant pipe 10 Since it is inserted into the pipe joint 83 of the piping unit 3 and connected by mechanical coupling, and the cap nut 27 of the renewed piping unit 3 is screwed into the flare male screw 28 of the existing indoor unit 9, it is connected. The three pipe joints 83 can be easily connected to the cut end 29 of the refrigerant pipe 10, and the efficiency of the pipe work can be significantly improved. That is, it is possible to perform the connection work quickly without the need for brazing as in the prior art. There is no risk of fire. Furthermore, there will be no problems such as fire alarm malfunction during construction. Conventionally, in the case of brazing, there has been a problem that the connection accuracy and quality vary depending on the technique of the operator. However, in the present invention, since the connection is made by mechanical coupling by the pipe joint 8, the connection accuracy and quality are made uniform. be able to.

  Further, since the heat insulating material 31 is attached to the outer peripheral surface of the renewal piping unit 3 in advance, the efficiency of the piping work can be further improved. That is, if the heat insulating material 31 is attached to the renewal piping unit 3 in advance, it is possible to reduce the piping work process in the ceiling or the like which is difficult to work.

It is a side view of a branch piping unit. It is process explanatory drawing of the refrigerant | coolant piping method of this invention. It is process explanatory drawing. It is process explanatory drawing. It is process explanatory drawing. It is a side view which shows the other form of a branch piping unit. It is process explanatory drawing. It is principal part sectional drawing of a pipe joint, a liquid pipe joint, and a gas pipe joint. It is principal part sectional drawing. It is a side view of a pressure measurement unit. It is process explanatory drawing. It is process explanatory drawing. It is process explanatory drawing. It is process explanatory drawing. It is a cross-sectional side view of a renewal piping unit. It is process explanatory drawing. It is process explanatory drawing. It is process explanatory drawing. It is a side view which shows the other form of the renewal piping unit. It is principal part sectional drawing which shows the other form of a pipe joint, a liquid pipe joint, and a gas pipe joint. It is principal part sectional drawing. It is a composition schematic diagram of an air harmony device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Branch piping unit 2 Pressure measurement unit 3 Renewal piping unit 4 Merge part 5 Branch pipe part 6 Branch pipe part 7 Branch pipe part 8 Fitting 9 Indoor unit
10 Refrigerant piping
11 Branch piping unit
12 Tip
13 Base end
14 Base end
16 communication pipe
17 Test pressure injection part
18 Pressure gauge attachment
19 Measuring tube
20 Refrigerant piping
21 1st short pipe
22 Second short pipe
23 Pressure gauge
24 edge
25 edge
26 Flare processing section
27 Cap nut
28 Flare male thread
29 Cut end
30 cap nut
31 Thermal insulation
32 outdoor unit
33 other end
73 main
74 Branch pipe
75 Tip
76 Tip
81 Liquid fittings
82 Gas fittings
83 Fitting
88 Fitting G Gas pipe L Liquid pipe

Claims (6)

  1.   A branch pipe unit (1) in which the other end of each of the three branch pipe parts (5), (6) and (7) having a pipe joint (8) at one end is integrated at a trifurcated junction (4). The tip (12) of the refrigerant pipe (10) whose base end is connected to the outdoor unit (32) is inserted into one pipe joint (8) of the three pipe joints (8) prepared in advance. The base end portion of the refrigerant pipe (10) to be connected by mechanical coupling, and the tip of the remaining two pipe joints (8) (8) to be connected to one or more indoor units (9) (13) A refrigerant piping method comprising inserting (14) and connecting by mechanical coupling.
  2.   One end of three or more branch pipes (74) is connected to the main pipe (73) whose one end is closed, and the other open end of the main pipe (73) and each of the branch pipes (74). A branch pipe unit (11) having a pipe joint (88) at the end is prepared in advance, and the base pipe is connected to the pipe joint (88) of the main pipe (73) and the refrigerant pipe (10) is connected to the outdoor unit (32). Refrigerant piping which is to be connected to one or more indoor units (9) by inserting one end portion (12) into the pipe joint (88) of the branch pipe (74) and connecting by mechanical coupling. A refrigerant piping method, wherein the base end portions (13) of (10) are inserted one after another and connected by mechanical coupling.
  3.   In a refrigerant piping method for an airtight test, a first short pipe (21) having a liquid pipe joint (81) to be connected to a liquid pipe (L) for refrigerant at one end, and a gas pipe for refrigerant (G ), A second short pipe (22) having a gas pipe joint (82) to be connected to one end, and a communication pipe (16) for connecting and connecting the first short pipe (21) and the second short pipe (22). ) And a measuring tube having one end connected to the first short tube (21) or the second short tube (22) and having a test pressure injection portion (17) and a pressure gauge mounting portion (18) at the other end ( 19) and a pressure measuring unit (2) having a pressure gauge (23) previously prepared by cutting a predetermined position of the existing liquid pipe (L) and gas pipe (G) for refrigerant. The liquid pipe joint (81) and the gas pipe joint (82) of the pressure measurement unit (2) attached to the gauge mounting section (18) are connected to the end (24) of the liquid pipe (L) The gas pipe (G) was cut A refrigerant piping method comprising connecting to the end (25) by mechanical coupling.
  4.   In a refrigerant piping method for an airtight test, a first short pipe (21) having a liquid pipe joint (81) to be connected to a liquid pipe (L) for refrigerant at one end, and a gas pipe for refrigerant (G ), A second short pipe (22) having a gas pipe joint (82) to be connected to one end, and a communication pipe (16) for connecting and connecting the first short pipe (21) and the second short pipe (22). ) And a measuring tube having one end connected to the first short tube (21) or the second short tube (22) and having a test pressure injection portion (17) and a pressure gauge mounting portion (18) at the other end ( 19) and a liquid pipe joint (81) of the pressure measurement unit (2) in which a pressure gauge (23) is previously attached to the pressure gauge mounting portion (18). ) ・ The gas pipe joint (82) is connected to the outdoor unit (32) at the base end, and the liquid pipe (L) is connected to the outdoor unit (32). At the tip (76) of the tube (G) A refrigerant piping method comprising connecting by mechanical coupling.
  5.   A predetermined length having a flared portion (26) and a cap nut (27) rotatably attached to the flared portion (26) at the distal end and a pipe joint (83) at the proximal end The renewal piping unit (3) is prepared in advance, the existing cap nut (30) is removed from the flare male screw (28) of the existing indoor unit (9), and the existing refrigerant pipe (10) having a predetermined length is removed. The cut end (29) of the remaining refrigerant pipe (10) is inserted into the pipe joint (83) of the renewal pipe unit (3) and connected by mechanical coupling, and the renewal pipe unit ( 3. A refrigerant piping method, wherein the cap nut (27) of 3) is screwed and connected to the flare male screw (28) of the existing indoor unit (9).
  6.   The refrigerant piping method according to claim 5, wherein a heat insulating material (31) is previously attached to the outer peripheral surface of the renewal piping unit (3).
JP2006055164A 2006-03-01 2006-03-01 Coolant pipe arrangement method Pending JP2007232286A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006055164A JP2007232286A (en) 2006-03-01 2006-03-01 Coolant pipe arrangement method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006055164A JP2007232286A (en) 2006-03-01 2006-03-01 Coolant pipe arrangement method

Publications (1)

Publication Number Publication Date
JP2007232286A true JP2007232286A (en) 2007-09-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101056611B1 (en) 2008-11-14 2011-08-11 한영택 Hose distributor for hot water boiler mat
JP2014504353A (en) * 2010-08-13 2014-02-20 ペターソン、バートPETTERSON, Bart Weldless aluminum HVAC system
WO2014087660A1 (en) * 2012-12-07 2014-06-12 ダイキン工業株式会社 Piping unit for air conditioning device
JP5581457B2 (en) * 2012-02-09 2014-08-27 日立アプライアンス株式会社 Air conditioner
WO2019049746A1 (en) * 2017-09-05 2019-03-14 ダイキン工業株式会社 Air conditioning system and refrigerant branching unit
JP2019045129A (en) * 2017-09-05 2019-03-22 ダイキン工業株式会社 Air conditioning system
JP2019045103A (en) * 2017-09-05 2019-03-22 ダイキン工業株式会社 Refrigerant branch unit
WO2019102517A1 (en) * 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 Branch pipe unit and air conditioner using same
WO2019142575A1 (en) * 2018-01-22 2019-07-25 ダイキン工業株式会社 Branch unit, refrigeration device, and method for installing refrigeration device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101056611B1 (en) 2008-11-14 2011-08-11 한영택 Hose distributor for hot water boiler mat
JP2014504353A (en) * 2010-08-13 2014-02-20 ペターソン、バートPETTERSON, Bart Weldless aluminum HVAC system
JP5581457B2 (en) * 2012-02-09 2014-08-27 日立アプライアンス株式会社 Air conditioner
JPWO2013118174A1 (en) * 2012-02-09 2015-05-11 日立アプライアンス株式会社 Air conditioner
WO2014087660A1 (en) * 2012-12-07 2014-06-12 ダイキン工業株式会社 Piping unit for air conditioning device
JP2014115006A (en) * 2012-12-07 2014-06-26 Daikin Ind Ltd Air conditioner piping unit
EP2933571A4 (en) * 2012-12-07 2016-10-12 Daikin Ind Ltd Piping unit for air conditioning device
US10443866B2 (en) 2012-12-07 2019-10-15 Daikin Industries, Ltd. Method for fabricating a pipe unit and a method for installing an air conditioning device
WO2019049746A1 (en) * 2017-09-05 2019-03-14 ダイキン工業株式会社 Air conditioning system and refrigerant branching unit
JP2019045129A (en) * 2017-09-05 2019-03-22 ダイキン工業株式会社 Air conditioning system
JP2019045103A (en) * 2017-09-05 2019-03-22 ダイキン工業株式会社 Refrigerant branch unit
WO2019102517A1 (en) * 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 Branch pipe unit and air conditioner using same
WO2019142575A1 (en) * 2018-01-22 2019-07-25 ダイキン工業株式会社 Branch unit, refrigeration device, and method for installing refrigeration device

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