JP2007232286A

JP2007232286A - Coolant pipe arrangement method

Info

Publication number: JP2007232286A
Application number: JP2006055164A
Authority: JP
Inventors: Jun Fukuyama; 潤福山; Nobuhiko Nakatsu; 延彦中津
Original assignee: NAKATSU KK; Higashio Mech Co Ltd
Current assignee: NAKATSU KK; Higashio Mech Co Ltd
Priority date: 2006-03-01
Filing date: 2006-03-01
Publication date: 2007-09-13

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

本発明は、冷媒配管方法に関する。 The present invention relates to a refrigerant piping method.

従来、１台の室外機に複数台の室内機が冷媒配管にて接続されて成る空気調和装置があり、一端が室外機に接続された冷媒配管は、途中で三叉状に分岐して各室内機へと配設されていた。
このような冷媒配管の従来の施工方法として、冷媒配管の分岐予定位置に、予め作製されたＴ字状若しくはＹ字状の分岐管を配置し、そして、その分岐管の１つの端部を室外機に連結された冷媒配管端部に鑞付けして接続し、分岐管の残りの２つの端部をそれぞれ室内機に連結される予定の冷媒配管端部に鑞付けして接続する方法がある（特許文献１参照）。 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).

また、従来から、冷媒配管の気密性が維持されているか否かを調べる気密テストが行われており、例えば、液冷媒用の液管とガス冷媒用のガス管の気密性を同時に調べる気密テストがある。具体的には、窒素ガスを注入するために、液管に接続する液側導管と、ガス管に接続するガス側導管と、を備えた気密テスト装置を用意し、基端が室外機と連結された液管とガス管の先端部に、液側導管とガス側導管を鑞付けして接続し、試験終了後は鑞付け部分を切断して気密テスト装置を取り外していた（特許文献２参照）。 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) ).

また、空気調和装置の冷媒配管は、室内機側に付設されたフレア雄ネジにフレアナットにて螺着されているが（特許文献３参照）、室内機を交換する場合や、新冷媒に変更する場合は、既設のフレアナットを強度や寸法等が適合したものに交換する必要が生じる。このときの交換作業は、フレア雄ネジから既設のフレアナットを外し、冷媒配管を所定寸法切断してフレアナットと一緒に取り除く、そして、予めフレア加工したパイプの一端にフレアナットを取着して作製したリニューアル用の配管（図示省略）を、取り除いた箇所に配置し、その一端のフレアナットを上記フレア雄ネジに螺着すると共に、他端を既設の冷媒配管の切断端部に鑞付けして接続していた。
特開２００５−３３７５２４号公報特開平１０−１９７１１２号公報特開２００３−２５４５６４号公報 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

しかし、従来の冷媒配管の新設又はリニューアルのための配管作業、及び、従来の気密テスト用の配管作業には、いずれも鑞付けにて接続を行わなければならず、接続作業に時間がかかって面倒である上に、火災の虞れもあった。
さらに、上記気密テスト装置は、試験終了後、鑞付け部分を切断して取り外していたため、使用毎に液側導管とガス側導管が短くなり、多数回使用できないという欠点があった。 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.

そこで、本発明は、鑞付け作業を行わずに、容易かつ迅速に冷媒配管の接続を行うことができる冷媒配管方法を提供することを目的とする。 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.

上記目的を達成するために、本発明に係る冷媒配管方法は、一端に管継手を有する３本の分岐管部の各々の他端が三叉状合流部にて一体化して成る分岐配管ユニットを予め作製し、３個の上記管継手の内の１個の管継手に基端が室外機に連結された冷媒配管の先端部を挿入して機械的結合によって接続し、残りの２個の上記管継手に先端が１台以上の室内機と連結される予定の冷媒配管の基端部を挿入して機械的結合によって接続する。 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.

また、一端が閉塞状の主管に３本以上の枝管の一端が連通連結されて成ると共に上記主管の開口状の他端と上記枝管の各々の他端に管継手を有する分岐配管ユニットを予め作製し、上記主管の管継手に基端が室外機に連結された冷媒配管の先端部を挿入して機械的結合によって接続し、上記枝管の各々の管継手に先端が１台以上の室内機と連結される予定の冷媒配管の基端部を次々と挿入して機械的結合によって接続する。 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.

また、気密テスト用の冷媒配管方法に於て、冷媒用の液管に接続すべき液用管継手を一端に有する第１短管と、冷媒用のガス管に接続すべきガス用管継手を一端に有する第２短管と、上記第１短管と第２短管とを連通連結する連通管と、上記第１短管又は第２短管に一端が連通連結されると共にテスト圧注入部と圧力計取付部を他端に有する計測管と、を有する圧力計測ユニットを、予め作製し、既設の冷媒用の液管・ガス管の所定位置を切断し、圧力計を予め上記圧力計取付部に付設した上記圧力計測ユニットの液用管継手・ガス用管継手を、上記液管の切断した端部・上記ガス管の切断した端部に機械的結合によって接続する。 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.

また、気密テスト用の冷媒配管方法に於て、冷媒用の液管に接続すべき液用管継手を一端に有する第１短管と、冷媒用のガス管に接続すべきガス用管継手を一端に有する第２短管と、上記第１短管と第２短管とを連通連結する連通管と、上記第１短管又は第２短管に一端が連通連結されると共にテスト圧注入部と圧力計取付部を他端に有する計測管と、を有する圧力計測ユニットを、予め作製し、圧力計を予め上記圧力計取付部に付設した上記圧力計測ユニットの液用管継手・ガス用管継手を、基端が室外機に連結された上記液管の開放状の先端部・基端が室外機に連結された上記ガス管の先端部に機械的結合によって接続する。 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.

また、フレア加工部と、該フレア加工部に回転自在に取着した袋ナットとを、先端部に有し、かつ、管継手を基端に有する所定長さのリニューアル配管ユニットを予め作製し、既設の室内機のフレア雄ネジから既設袋ナットを取外し、かつ、所定長さの既設の冷媒配管を切断除去し、残った冷媒配管の切断端部を上記リニューアル配管ユニットの管継手に挿入して機械的結合によって接続すると共に、上記リニューアル配管ユニットの袋ナットを上記既設の室内機のフレア雄ネジに螺着して接続する。
また、予め保温材が上記リニューアル配管ユニットの外周面に付設されていてもよい。 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.

本発明は、次のような著大な効果を奏する。
本発明に係る冷媒配管方法によれば、分岐配管ユニット（圧力計測ユニット・リニューアル配管ユニット）の管継手（液用管継手・ガス用管継手）を冷媒配管の端部に簡単に接続して設置することができ、配管作業能率を著しく向上させることができる。即ち、従来のように鑞付けの手間を省いて迅速に接続作業を行うことができる。また、火災の虞れもなく安全に配管作業を行うことができる。さらに、工事中に火災警報機誤作動を起こす等の問題も生じない。 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.

以下、実施の形態を示す図面に基づき本発明を詳説する。
図22は、１台の室外機32と複数の室内機９とが冷媒配管10にて接続された空気調和装置の構成概略図である。この冷媒配管10は、液冷媒用の液管Ｌと、ガス冷媒用のガス管Ｇと、から成っており、ガス管Ｇは液管Ｌより太く形成されている。そして、液管Ｌ・ガス管Ｇは、共に、基端が室外機32に接続され、途中で三叉状に分岐して先端が各室内機９へと連絡して配設されている。
最初に説明する本発明に係る冷媒配管方法は、１台の室外機32と複数台の室内機９とを図22で示すように途中で分岐した冷媒配管10（液管Ｌ・ガス管Ｇ）で連通連結して空気調和装置を新設する場合の配管方法、又は、図22に示すような既設の空気調和装置に於て分岐した冷媒配管10（液管Ｌ・ガス管Ｇ）のみを新しい冷媒配管10に取り換える（リニューアルする）場合の配管方法である。 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).

まず、図１に示すのは、分岐配管ユニット１であり、分岐配管ユニット１は、３本の分岐管部５，６，７を有している。３本の分岐管部５，６，７の各々の一端には、管継手８を有し、分岐管部５，６，７の各々の他端は、三叉状合流部４にて一体化して連通連結されている。また、分岐管部５，６，７は、それぞれパイプ体53，54，55と、各パイプ体53，54，55の先端に付設された管継手８とから構成されている。
そして、この分岐配管ユニット１を予め作製しておく。 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.

図２〜図５に於て、上記分岐配管ユニット１を使用した冷媒配管10の配設手順を説明する。なお、液管Ｌの配設手順とガス管Ｇの配設手順は同様の手順で行うので、液管Ｌの場合のみについて説明し、ガス管Ｇの場合の説明を省略する。
図２に於て、（屋外の）所望の場所に室外機32を設置し、室外機32に液管Ｌ（の基端）を接続する。また、室外機32に連結された液管Ｌの先端部12は、所望の分岐予定位置に配置されている。 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.

そして、図３〜図５に示すように、所望の分岐予定位置に分岐配管ユニット１（１ａ）を配置し、分岐配管ユニット１（１ａ）の３個の管継手８の内の１個の管継手８に、基端が室外機32に連結された冷媒配管10の先端部12を挿入して機械的結合によって接続し、残りの２個の管継手８，８に先端が（１台以上の）室内機９と連結される予定の液管Ｌの基端部13，14を挿入して機械的結合によって接続する。 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.

詳しくは、図３に於て、予め作製した上記分岐配管ユニット１ａを上記分岐予定位置に配置し、分岐配管ユニット１ａの分岐管部５の管継手８に冷媒配管10の先端部12を挿入して機械的結合によって接続する。 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.

そして、図４に於て、分岐管部６の管継手８に、先端が室内機９ａと連結される予定の液管Ｌの基端部13を挿入して機械的結合によって接続する。さらに、分岐管部７の管継手８に、先端が別の室内機９ｂ，９ｃ（図５参照）と連結される予定の液管Ｌの基端部14を挿入して機械的結合によって接続する。なお、この場合、分岐管部７の管継手８に接続される液管Ｌの先端には、別の分岐配管ユニット１ｂを介して室内機９ｂ，９ｃが連結される。 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.

図５に於て、基端が分岐配管ユニット１ａの分岐管部７と接続された液管Ｌの先端部12を、別の分岐配管ユニット１ｂの分岐管部５の管継手８に挿入して機械的結合によって接続する。そして、分岐配管ユニット１ｂの分岐管部６の管継手８に、先端が室内機９ｂと連結される予定の液管Ｌの基端部13を挿入して機械的結合によって接続し、分岐配管ユニット１ｂの分岐管部７の管継手８に、先端が室内機９ｃと連結される予定の液管Ｌの基端部14を挿入して機械的結合によって接続する。
なお、上述した実施の形態では、図５に示すように、室内機９を３台、分岐配管ユニット１を２個設置する場合について説明したが、室内機９の台数や分岐配管ユニット１の個数はこれらに限定されず変更自由である。 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.

また、管継手８の構成と作用について具体的に説明すると、図８に示すように、管継手８は、継手本体34とリテーナ35とを備えている。そして、継手本体34は、雌ネジ部38を先端の内周面に有する短筒体36と、短筒体36が抜止手段39を介して回転可能に連結された固定部材37とを、もって構成されている。さらに、円筒状のリテーナ35は、上記短筒体36の雌ネジ部38に螺合するように形成された雄ネジ部40を有し、かつ、複数個の配管抜止用の小円盤連設体41を有している。小円盤連設体41は、回転可能にリテーナ35の本体部35ａに埋設され、リテーナ35の先端にはフランジ部47を有している。また、雌ネジ部38は、基端側から先端側に向かって、平行雌ネジ部45と、テーパ雌ネジ部46とを順次有している。 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.

固定部材37の内周面には、環状ストッパ44と、さらに、２つの環状凹溝43，43とが、設けられている。固定部材37の基端には分岐管部５（６，７）のパイプ体53（54，55）が挿入され、パイプ体53（54，55）の先端面がストッパ44に当接している。また、各環状凹溝43，43には、それぞれリング状のシール材42が装着されている。
なお、分岐管部６，７の各々の管継手８の構成は、上記分岐管部５の管継手８の構成と同様であるので説明を省略する。 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.

そして、管継手８と既設の液管Ｌ（冷媒配管10）の先端部12（基端部13，14）とを接続する配管作業は、図８に示すように、液管Ｌの先端部12を、リテーナ35の孔部を通過させて、短筒体36・固定部材37内に挿入し、先端部12の端面をストッパ44に当接させて位置決めする。 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.

そして、リテーナ35を、短筒体36の雌ネジ部38と冷媒配管10との隙間に挿入する。短筒体36のみを回転させると、リテーナ35が（短筒体36内へ）螺進し、リテーナ35の小円盤連設体41は冷媒配管10の外周面に食い込みながら回転する。つまり、図９に示すように、小円盤連設体41は、冷媒配管10の外周面を遊星回転しながら螺旋状の食込跡（ネジ）を転造する。そして、螺進するリテーナ35のフランジ部47が、短筒体36の先端面に当接して位置決めされ、冷媒配管10の先端部12は管継手８に機械的結合によって接続される。
なお、図４又は図５に於て、液管Ｌの基端部13，14と、分岐管部６，７の各々の管継手８との接続方法は、上記液管Ｌの先端部12と分岐管部５の管継手８との接続方法と同様であるので説明を省略する。 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.

また、上記冷媒配管方法は、室外機32・室内機９を新たに設置して冷媒配管10を配設する新設の配管方法について説明したが、既設の室外機32・室内機９を残し、冷媒配管10全体を新しいものに取り換えるリニューアルの配管方法の場合も同様に行えばよいので説明を省略する。
なお、上記分岐配管ユニット１は、略Ｙ字状に形成されているが、Ｔ字状、又は、それ以外の形状であっても構わない。また、分岐配管ユニット１を予め作製する際に、同時に、又は、その後に、分岐配管ユニット１（分岐管部５，６，７や合流部４）の外周面に、保温材を付設（巻設）するのも好ましい。 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.

次に、他の形態の分岐配管ユニットを使用した冷媒配管方法について説明する。
図６に示すのは、上述した分岐配管ユニット１と異なる形態の分岐配管ユニット11であり、この分岐配管ユニット11は、一端が閉塞状の主管73（の外周面）に３本以上の枝管74の一端が連通連結されて成るヘッダー型の分岐配管であり、さらに、主管73の開口状の他端と枝管74の各々の他端に管継手88を有している。
そして、この分岐配管ユニット11を予め作製しておく。 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.

以下、分岐配管ユニット11を使用した冷媒配管10の配設手順を説明する。なお、液管Ｌの配設手順とガス管Ｇの配設手順は同様の手順で行うので、液管Ｌとガス管Ｇとをまとめて冷媒配管10として説明する。
図７に於て、所望の場所に設置された室外機32に冷媒配管10（の基端）を連結する。その冷媒配管10の先端部12は分岐予定位置に配置されており、予め作製した分岐配管ユニット11を上記分岐予定位置に配置し、冷媒配管10の先端部12を、分岐配管ユニット11の主管73の管継手88に挿入して機械的結合によって接続する。そして、各枝管74の管継手88に、先端が（１台以上の）室内機９と連結される予定の冷媒配管10の基端部13を挿入して機械的結合によって接続する。
なお、分岐配管ユニット11の管継手88と、冷媒配管10の先端部12及び基端部13との機械的結合は、図８と図９にて説明したのと同様であるので説明を省略する。また、リニューアルの配管方法の場合も同様に行えばよいので説明を省略する。また、分岐配管ユニット11を予め作製する際に、同時に、又は、その後に、分岐配管ユニット11（主管73や枝管74）の外周面に、保温材を付設（巻設）するのも好ましい。 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.

図10〜図14に於て、気密テスト用の冷媒配管方法について説明する。
まず、予め、図10に示すような圧力計測ユニット２を作製する。この圧力計測ユニット２は、液管Ｌに接続すべき液用管継手81を一端に有する第１短管21と、ガス管Ｇに接続すべきガス用管継手82を一端に有する第２短管22と、第１短管21と第２短管22とを連通連結するＵ字状の連通管16と、を備えている。さらに、圧力計測ユニット２は、第２短管22に一端が連通連結されると共にテスト圧注入部17と圧力計取付部18を他端に有する計測管19を、具備している。 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.

液用管継手81及びガス用管継手82は、第１短管21及び第２短管22の各々のパイプ体91，92の一端に付設されており、連通管16は、各パイプ体91，92の他端に連結されている。具体的には、連通管16の両端を、各パイプ体91，92の（左側の）他端開口部に挿入し、各パイプ体91，92のそれぞれ他端開口部をピンチ加工して閉じ、さらに、鑞付けして接続してある。
なお、計測管19の一端は、第１短管21のパイプ体91にピンチ加工して鑞付けして連通連結されていてもよい。 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.

図11に於て、既設の液管Ｌとガス管Ｇに於て、気密テストをするために所定の切断位置Ａを設定し、パイプカッター等でその切断位置Ａを切断すると、図12に示すように、液管Ｌ・ガス管Ｇにそれぞれ切断端部24，25が形成される。
予め作製した上記圧力計測ユニット２の圧力計取付部18に圧力計23を付設し、そして、図13に示すように、液用管継手81・ガス用管継手82を、液管Ｌの切断端部24・ガス管Ｇの切断端部25に機械的結合によって接続する。この場合、左側の切断端部24，25に接続する。この液用管継手81とガス用管継手82の構造と作用は、図８と図９にて説明した管継手８と同様であるので説明を省略する。
なお、この場合、図13に於て図示省略しているが、切断箇所より右側の液管Ｌとガス管Ｇは、圧力計測ユニット２の接続の妨げにならないようにずらす等してある。 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.

また、バルブ48とホース49を取り付けた窒素ガスボンベ50を用意し、ホース49の先端を圧力計測ユニット２のテスト圧注入部17に接続する。バルブ48を開放し、窒素ガスを液管Ｌとガス管Ｇ内に注入し、所定圧力になるとバルブ48を閉じて、所定時間放置する。そして、所定時間経過後、圧力が低下しているかどうか圧力計23で確認を行う。
圧力が低下していない場合は、気密性が維持されていることが判断でき、圧力が低下している場合は、液管Ｌ・ガス管Ｇの漏れ箇所を探して修復する。 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.

気密テストが終了したら、液管Ｌとガス管Ｇの切断端部24，25から液用管継手81とガス用管継手82とを取り外す。具体的には、図９に於て、液用管継手81・ガス用管継手82の短筒体36を（接続する場合と逆回転に）回転させると、リテーナ35が（右側へ）螺退し機械的結合が解除される（図８参照）。 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).

また、気密テスト終了後、液管Ｌの両切断端部24，24と、ガス管Ｇの両切断端部25，25を、それぞれ再び連通連結するために、図14に示す、両端に管継手52，52を有する継手部材51を介在させて連結する。管継手52は、図８と図９に示す管継手８と同様の構成であり、各切断端部24，25は管継手52に挿入されて機械的結合によって接続される。 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.

さらに、他の気密テスト用の冷媒配管方法について説明すると、この場合の冷媒配管方法は、室外機32・室内機９・冷媒配管10を新設する場合、又は、既設の室外機32・室内機９を残して冷媒配管10のみリニューアルする場合、に於ける配管方法である。
まず、上記圧力計測ユニット２を予め作製し、圧力計測ユニット２の圧力計取付部18に圧力計23を付設する。
図13に於て、屋外に設置した室外機32に所定長さの液管Ｌ・ガス管Ｇを連結し、その液管Ｌ・ガス管Ｇの各々の先端部75，76を、圧力計測ユニット２の液用管継手81・ガス用管継手82に挿入して機械的結合によって接続する。そして、液管Ｌ・ガス管Ｇに窒素ガスを注入して、所定時間経過後、漏れがあるか否かを確認できたら、液管Ｌとガス管Ｇの先端部75，76から液用管継手81とガス用管継手82とを取り外す。 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.

図示省略するが、圧力計測ユニット２を取り外した液管Ｌとガス管Ｇの先端部75，76に、さらに、所定長さの別の液管Ｌ・ガス管Ｇをそれぞれ接続して継ぎ足し、その液管Ｌ・ガス管Ｇの各先端部に圧力計測ユニット２を取り付けて上記と同様にして気密テストを行う。このように、所定長さの液管Ｌ・ガス管Ｇを継ぎ足し作業と、気密テストとを繰り返し行いながら、全ての液管Ｌ・ガス管Ｇを配設する。
なお、図13に示すように、複数箇所で分岐して配設されている液管Ｌ・ガス管Ｇの気密テストを行う場合、圧力計測ユニット２を取り付ける液管Ｌ・ガス管Ｇの端部以外の端部は、閉塞された状態となっている。 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.

図15〜図18に於て、既設の室内機に接続された袋ナットと冷媒配管の一部を、新しい袋ナットと冷媒配管に交換（リニューアル）する場合（方法）について説明する。
まず、図15に示す所定長さのリニューアル配管ユニット３を予め作製する。このリニューアル配管ユニット３は、先端部にフレア加工部26を有するパイプ体56と、フレア加工部26に回転自在に取着した袋ナット27とを、有し、パイプ体56の基端に管継手83を付設している。 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.

図16に於て、既設の室内機９には、液管Ｌとガス管Ｇを接続するためのフレア雄ネジ28，28が付設され、既設の液管Ｌの一端及びガス管Ｇの一端にそれぞれ回転自在に取着された袋ナット30，30が、各フレア雄ネジ28，28に螺着され連結されている。
室内機９のフレア雄ネジ28から、袋ナット30を取外し、所定長さの液管Ｌとガス管Ｇを切断して袋ナット30と一緒に除去する。図17に示すように、残った液管Ｌとガス管Ｇには、それぞれ切断端部29，29が形成される。 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.

図18に於て、液管Ｌとガス管Ｇの切断して除去した位置に、それぞれ上記リニューアル配管ユニット３を設置する。そして、各切断端部29，29をリニューアル配管ユニット３，３の管継手83，83に挿入して機械的結合によって接続すると共に、リニューアル配管ユニット３，３の袋ナット27，27をフレア雄ネジ28，28に螺着して接続する。なお、管継手83の構成・作用については、図８と図９にて既に説明した管継手８の構成・作用と同様であるので説明を省略する。 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.

また、リニューアル配管ユニット３を室内機９及び液管Ｌとガス管Ｇに接続作業をする前に、リニューアル配管ユニット３の外周面に、予め保温材31を付設しておいてもよい（図19参照）。
この保温材31は、図19に示すように、パイプ体56の外周面に取着され、例えば、保温材31は２個の半円筒状の分割体57，57から成り、パイプ体56の外周を包囲するように付設されている。また、図示省略するが、保温材31は、テープ状の部材であって、パイプ体56に巻設されていてもよい。 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.

また、図20と図21に示すのは、上記管継手８・管継手88・液用管継手81・ガス用管継手82・管継手83の他の実施の形態であり、この構成及び作用について説明する。なお、管継手８の構成及び作用と、管継手88・液用管継手81・ガス用管継手82・管継手83の構成及び作用は、同様であるので、以下管継手８について合わせて説明する。
図20に於て、管継手８は、雄ネジ部62を有する継手本体60と、雄ネジ部62に螺着される袋ナット61とを、備える。袋ナット61の先端内周面には環状凹溝64が形成され、凹溝64にリング状のシール材63が装着されている。さらに、袋ナット61の内周面には、継手本体60の雄ネジ部62に螺着される雌ネジ部65と、先端から基端に向かって拡径状のテーパ部66と、を有している。 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.

継手本体60は、冷媒配管10（液管Ｌ・ガス管Ｇ）が差し込まれて外嵌・内嵌状に保持する外嵌筒部67と内嵌筒部68とを有する。内嵌筒部68の外周面には、冷媒配管10を内径方向へ環状に縮径変形させるための周状溝69が形成され、外嵌筒部67の外周面には、上記袋ナット61のテーパ部66当接するテーパ状外面部70を有している（図21参照）。 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).

さらに、管継手８は、円周に１個の切れ目を有するＣ字状の抜止めリング71を、袋ナット61内に備え、抜止めリング71は回転可能に取着された複数個の回転子72を有している。 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.

この管継手８の作用について説明すると、まず、図20に於て、冷媒配管10の端部を、袋ナット61の孔部を通過させて、継手本体60の外嵌筒部67と内嵌筒部68との間に挿入する。次に、袋ナット61を回転させて継手本体60側へ螺進させるに伴って、抜止めリング71の回転子72が、自転すると共に冷媒配管10の外周面を公転する。さらに、袋ナット61を螺進させると、抜止めリング71は冷媒配管10の外周面を回転しながら、次第に縮径していき、図21に示すように、冷媒配管10を円環状に縮径塑性変形させる。このようにして、管継手８と冷媒配管10が機械的結合によって接続される。
また、この場合、抜止めリング71は、袋ナット61の回転速度より遅く回転するので、袋ナット61の非常に小さい回転トルクにて強固に接続することができる。 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.

なお、上記管継手８・管継手88・液用管継手81・ガス用管継手82・管継手83は、上記実施の形態に限らず、機械的結合によって接続可能な管継手であれば、例えば、図８に於て、シール材42を１個にする等、別の形状のものに設計変更自由である。 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.

以上のように、本発明の冷媒配管方法は、一端に管継手８を有する３本の分岐管部５，６，７の各々の他端が三叉状合流部４にて一体化して成る分岐配管ユニット１を予め作製し、３個の管継手８の内の１個の管継手８に基端が室外機32に連結された冷媒配管10の先端部12を挿入して機械的結合によって接続し、残りの２個の管継手８，８に先端が１台以上の室内機９と連結される予定の冷媒配管10の基端部13，14を挿入して機械的結合によって接続するので、分岐配管ユニット１の管継手８を冷媒配管10の先端部12及び冷媒配管10の基端部13，14に簡単に接続して設置することができ、配管作業の能率を著しく向上させることができる。即ち、従来のように鑞付けの手間を省いて迅速に接続作業を行うことができる。また、火災の虞れもない。さらに、工事中に火災警報機誤作動を起こす等の問題も生じない。従来は、鑞付けの場合は作業者の技術によって接続精度・品質にばらつきが生じる問題があったが、本発明では管継手８による機械的結合によって接続するので、接続精度・品質を均一にすることができる。 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.

また、一端が閉塞状の主管73に３本以上の枝管74の一端が連通連結されて成ると共に主管73の開口状の他端と枝管74の各々の他端に管継手88を有する分岐配管ユニット11を予め作製し、主管73の管継手88に基端が室外機32に連結された冷媒配管10の先端部12を挿入して機械的結合によって接続し、枝管74の各々の管継手88に先端が１台以上の室内機９と連結される予定の冷媒配管10の基端部13を次々と挿入して機械的結合によって接続するので、分岐配管ユニット11の管継手88を冷媒配管10の先端部12に簡単に接続することができ、枝管74の各々の管継手を冷媒配管10の基端部13に簡単に接続して設置することができる。このことにより、配管作業の能率を著しく向上させることができる。即ち、従来のように鑞付けの手間を省いて迅速に接続作業を行うことができる。また、火災の虞れもない。さらに、工事中に火災警報機誤作動を起こす等の問題も生じない。従来は、鑞付けの場合は作業者の技術によって接続精度・品質にばらつきが生じる問題があったが、本発明では管継手88による機械的結合によって接続するので、接続精度・品質を均一にすることができる。 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.

また、気密テスト用の冷媒配管方法に於て、冷媒用の液管Ｌに接続すべき液用管継手81を一端に有する第１短管21と、冷媒用のガス管Ｇに接続すべきガス用管継手82を一端に有する第２短管22と、第１短管21と第２短管22とを連通連結する連通管16と、第１短管21又は第２短管22に一端が連通連結されると共にテスト圧注入部17と圧力計取付部18を他端に有する計測管19と、を有する圧力計測ユニット２を、予め作製し、既設の冷媒用の液管Ｌ・ガス管Ｇの所定位置を切断し、圧力計23を予め圧力計取付部18に付設した圧力計測ユニット２の液用管継手81・ガス用管継手82を、液管Ｌの切断した端部24・ガス管Ｇの切断した端部25に機械的結合によって接続するので、圧力計測ユニット２の液用管継手81・ガス用管継手82を、液管Ｌの切断端部24・ガス管Ｇの切断端部25に簡単に接続して設置することができ、気密テスト用の冷媒配管作業の能率を著しく向上させることができる。即ち、従来のように鑞付けの手間を省いて迅速に接続作業を行うことができる。また、火災の虞れもなく、各切断端部24，25から液用管継手81・ガス用管継手82を取り外せば、上記圧力計測ユニット２を多数回使用することができる。さらに、工事中に火災警報機誤作動を起こす等の問題も生じない。 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.

また、気密テスト用の冷媒配管方法に於て、冷媒用の液管Ｌに接続すべき液用管継手81を一端に有する第１短管21と、冷媒用のガス管Ｇに接続すべきガス用管継手82を一端に有する第２短管22と、第１短管21と第２短管22とを連通連結する連通管16と、第１短管21又は第２短管22に一端が連通連結されると共にテスト圧注入部17と圧力計取付部18を他端に有する計測管19と、を有する圧力計測ユニット２を、予め作製し、圧力計23を予め圧力計取付部18に付設した圧力計測ユニット２の液用管継手81・ガス用管継手82を、基端が室外機32に連結された液管Ｌの先端部75・基端が室外機32に連結されたガス管Ｇの先端部76に機械的結合によって接続するので、圧力計測ユニット２の液用管継手81・ガス用管継手82を、液管Ｌの先端部75・ガス管Ｇの先端部76に簡単に接続して設置することができ、気密テスト用の冷媒配管作業の能率を著しく向上させることができる。即ち、従来のように鑞付けの手間を省いて迅速に接続作業を行うことができる。また、火災の虞れもなく、液管Ｌ・ガス管Ｇの各先端部75，76から液用管継手81・ガス用管継手82を取り外せば、上記圧力計測ユニット２を多数回使用することができる。さらに、工事中に火災警報機誤作動を起こす等の問題も生じない。 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.

また、フレア加工部26と、フレア加工部26に回転自在に取着した袋ナット27とを、先端部に有し、かつ、管継手83を基端に有する所定長さのリニューアル配管ユニット３を予め作製し、既設の室内機９のフレア雄ネジ28から既設袋ナット30を取外し、かつ、所定長さの既設の冷媒配管10を切断除去し、残った冷媒配管10の切断端部29をリニューアル配管ユニット３の管継手83に挿入して機械的結合によって接続すると共に、リニューアル配管ユニット３の袋ナット27を既設の室内機９のフレア雄ネジ28に螺着して接続するので、リニューアル配管ユニット３の管継手83を冷媒配管10の切断端部29に簡単に接続して設置することができ、配管作業の能率を著しく向上させることができる。即ち、従来のように鑞付けの手間を省いて迅速に接続作業を行うことができる。また、火災の虞れもない。さらに、工事中に火災警報機誤作動を起こす等の問題も生じない。従来は、鑞付けの場合は作業者の技術によって接続精度・品質にばらつきが生じる問題があったが、本発明では管継手８による機械的結合によって接続するので、接続精度・品質を均一にすることができる。 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.

また、予め保温材31がリニューアル配管ユニット３の外周面に付設されているので、配管作業の能率を一層向上させることができる。即ち、予めリニューアル配管ユニット３に保温材31を付設しておけば、作業しにくい天井裏等での配管作業工程を減少させることができる。 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.

分岐配管ユニットの側面図である。It is a side view of a branch piping unit. 本発明の冷媒配管方法の工程説明図である。It is process explanatory drawing of the refrigerant | coolant piping method of this invention. 工程説明図である。It is process explanatory drawing. 工程説明図である。It is process explanatory drawing. 工程説明図である。It is process explanatory drawing. 分岐配管ユニットの他の形態を示す側面図である。It is a side view which shows the other form of a branch piping unit. 工程説明図である。It is process explanatory drawing. 管継手・液用管継手・ガス用管継手の要部断面図である。It is principal part sectional drawing of a pipe joint, a liquid pipe joint, and a gas pipe joint. 要部断面図である。It is principal part sectional drawing. 圧力計測ユニットの側面図である。It is a side view of a pressure measurement unit. 工程説明図である。It is process explanatory drawing. 工程説明図である。It is process explanatory drawing. 工程説明図である。It is process explanatory drawing. 工程説明図である。It is process explanatory drawing. リニューアル配管ユニットの断面側面図である。It is a cross-sectional side view of a renewal piping unit. 工程説明図である。It is process explanatory drawing. 工程説明図である。It is process explanatory drawing. 工程説明図である。It is process explanatory drawing. リニューアル配管ユニットの他の形態を示す側面図である。It is a side view which shows the other form of the renewal piping unit. 管継手・液用管継手・ガス用管継手の他の形態を示す要部断面図である。It is principal part sectional drawing which shows the other form of a pipe joint, a liquid pipe joint, and a gas pipe joint. 要部断面図である。It is principal part sectional drawing. 空気調和装置の構成概略図である。It is a composition schematic diagram of an air harmony device.

Explanation of symbols

１分岐配管ユニット
２圧力計測ユニット
３リニューアル配管ユニット
４合流部
５分岐管部
６分岐管部
７分岐管部
８管継手
９室内機
10 冷媒配管
11 分岐配管ユニット
12 先端部
13 基端部
14 基端部
16 連通管
17 テスト圧注入部
18 圧力計取付部
19 計測管
20 冷媒配管
21 第１短管
22 第２短管
23 圧力計
24 端部
25 端部
26 フレア加工部
27 袋ナット
28 フレア雄ネジ
29 切断端部
30 袋ナット
31 保温材
32 室外機
33 他端部
73 主管
74 枝管
75 先端部
76 先端部
81 液用管継手
82 ガス用管継手
83 管継手
88 管継手
Ｇガス管
Ｌ液管 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

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.

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.

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.

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.

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).

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).