JPH07280376A - Air conditioner - Google Patents

Air conditioner

Info

Publication number
JPH07280376A
JPH07280376A JP7052860A JP5286095A JPH07280376A JP H07280376 A JPH07280376 A JP H07280376A JP 7052860 A JP7052860 A JP 7052860A JP 5286095 A JP5286095 A JP 5286095A JP H07280376 A JPH07280376 A JP H07280376A
Authority
JP
Japan
Prior art keywords
refrigerant
branch
pipe
outdoor unit
indoor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7052860A
Other languages
Japanese (ja)
Other versions
JP2682500B2 (en
Inventor
Norifumi Maruyama
法文 丸山
Takashi Matsuzaki
隆 松崎
Yukio Shigenaga
幸雄 重永
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP7052860A priority Critical patent/JP2682500B2/en
Publication of JPH07280376A publication Critical patent/JPH07280376A/en
Application granted granted Critical
Publication of JP2682500B2 publication Critical patent/JP2682500B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

(57)【要約】 【目的】 各室内ユニットへの冷媒配管を可能な限り共
用することにより、施工性、冷媒洩れに対する信頼性、
及び冷媒の分流性を良好に確保しつつ、冷媒配管長を可
及的に短縮する。 【構成】 室外ユニットから室内ユニットの近傍まで延
びる一対の主冷媒配管が設けられている。更に、複数台
の室内ユニットの近傍に配置され、主冷媒配管に接続さ
れる主流通口(40b)を有すると共に、室内ユニット
の台数以上の数の分岐流通口(40i〜40n)を有す
る一対の冷媒分岐管(40)が設けられている。その
上、冷媒分岐管(40)の分岐流通口(40i〜40
n,41i〜41n)と対応する各室内ユニットとを接
続する分岐冷媒配管が設けられている。加えて、冷媒分
岐管(40)における主流通口(40b)の端部には、
切断可能で且つ室外ユニットの能力に対応した異なる径
の主冷媒配管が接続可能な異径部(40s)が形成され
ている。
(57) [Summary] [Purpose] By sharing the refrigerant piping to each indoor unit as much as possible, the workability and reliability against refrigerant leakage,
Also, the length of the refrigerant pipe is shortened as much as possible while ensuring good flow distribution of the refrigerant. [Configuration] A pair of main refrigerant pipes extending from the outdoor unit to the vicinity of the indoor unit are provided. Furthermore, a pair of indoor circulation units (40i-40n) having a main circulation port (40b) connected to the main refrigerant pipe and arranged in the vicinity of the plurality of indoor units and having a number of branch circulation ports (40i to 40n) equal to or larger than the number of indoor units. A refrigerant branch pipe (40) is provided. In addition, the branch flow ports (40i-40) of the refrigerant branch pipe (40).
n, 41i to 41n) and a branch refrigerant pipe that connects each indoor unit corresponding thereto. In addition, at the end of the main flow port (40b) of the refrigerant branch pipe (40),
A different-diameter portion (40 s) that can be cut and to which main refrigerant pipes having different diameters corresponding to the capacity of the outdoor unit can be connected is formed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、1台の室外ユニットに
対して複数台の室内ユニット備えた,いわゆるマルチ型
式の空気調和装置に関し、特に、複数台の室内ユニット
への冷媒分岐管の改良、及び冷媒配管長の短縮化対策に
関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called multi-type air conditioner having a plurality of indoor units with respect to one outdoor unit, and more particularly, an improvement of a refrigerant branch pipe to the plurality of indoor units. , And measures for shortening the refrigerant pipe length.

【0002】[0002]

【従来の技術】従来より、この種のマルチ型式の空気調
和機として、例えば実開昭50−91165号公報に開
示されるように、1台の室外ユニット内に冷媒分岐管を
配置し、該冷媒分岐管に主流通口と複数個の分岐流通口
とを形成してヘッダとし、該主流通口を上記室外ユニッ
ト内の冷媒配管に連通接続すると共に、複数個の分岐流
通口を各々上記室内ユニットの台数に相当する複数本の
冷媒配管を介して複数台の室内ユニットに連通接続し
て、各室内ユニットを互いに並列に、且つ上記室外ユニ
ットに対して冷媒の流通可能に設けることにより、1台
の室外ユニットを共用しつつ、各室外ユニットで対応す
る複数室内を良好に空調するようにしたものが知られて
いる。
2. Description of the Related Art Conventionally, as a multi-type air conditioner of this type, for example, as disclosed in Japanese Utility Model Publication No. 50-91165, a refrigerant branch pipe is arranged in one outdoor unit, A main flow port and a plurality of branch flow ports are formed in the refrigerant branch pipe to form a header, the main flow port is connected to the refrigerant pipe in the outdoor unit, and a plurality of branch flow ports are provided in the indoor space. By connecting in communication with a plurality of indoor units via a plurality of refrigerant pipes corresponding to the number of units and providing each indoor unit in parallel with each other and allowing the refrigerant to flow to the outdoor unit, It is known that one outdoor unit is shared and at the same time, the plurality of outdoor units corresponding to each outdoor unit are satisfactorily air-conditioned.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記従
来のものでは、冷媒は室外ユニット内で分流し、この分
流した冷媒の各々が対応する室内ユニットに流通する関
係上、各室内ユニットへの冷媒配管が併行して且つ長く
走り、その分、その配管長に無駄が生じる欠点がある。
特に、高層ビル等にマルチ型式の空気調和機を設ける場
合、室外ユニットを屋上や地下の機器室内に配置すると
きには、分岐後の冷媒配管長が極めて長くなる。
However, in the above-mentioned prior art, since the refrigerant is diverted in the outdoor unit and each of the diverted refrigerant is circulated to the corresponding indoor unit, the refrigerant pipe to each indoor unit is circulated. Run in parallel and run for a long time, and there is a drawback that the pipe length is wasted accordingly.
In particular, when a multi-type air conditioner is installed in a high-rise building or the like, the length of the refrigerant pipe after branching becomes extremely long when the outdoor unit is placed on the roof or in the underground equipment room.

【0004】そこで、従来、例えば第6図に示す如く、
室外ユニット(a)と複数台の室内ユニット(b〜g)
とを、複数個(図では5個)の二股分岐管(h…)を使
用して接続して、冷媒配管を可能な限り共用することが
行われるが、この場合には、二股分岐管(h)の点数が
多くなる。しかも、分岐箇所での冷媒配管のロウ付け箇
所数は1個の二股分岐管(h)当り3箇所であるから、
二股分岐管(h)の点数増大に伴いロウ付け箇所数が多
くなって工数が増え、施工費用が増大すると共に、冷媒
洩れに対する信頼性が低下する欠点が生じる。また、分
岐箇所の増大に伴い冷媒が偏流し易くなる欠点も生じ
る。
Therefore, conventionally, for example, as shown in FIG.
Outdoor unit (a) and multiple indoor units (b to g)
Is connected by using a plurality of (five in the figure) bifurcated branch pipes (h ...) to share the refrigerant pipe as much as possible. The score of h) increases. Moreover, since the number of brazing points of the refrigerant pipe at the branch point is three per one bifurcated branch pipe (h),
As the number of bifurcated branch pipes (h) increases, the number of brazing points increases, the number of processes increases, the construction cost increases, and the reliability against refrigerant leakage decreases. Further, there is a drawback that the refrigerant tends to flow unevenly as the number of branch points increases.

【0005】本発明は斯かる点に鑑みてなされたもので
あり、その目的は、二股分岐管を使用せず、上記従来公
報の如きヘッダとしての冷媒分岐管を使用しつつ、各室
内ユニットへの冷媒配管を可能な限り共用することによ
り、1個の冷媒分岐管でもって施工性、冷媒洩れに対す
る信頼性、及び冷媒の分流性を良好に確保しつつ、全体
としての冷媒配管長を可及的に短縮することにある。
The present invention has been made in view of the above circumstances, and an object thereof is to use each of the indoor units while using the refrigerant branch pipe as the header as in the above-mentioned conventional publication without using the bifurcated branch pipe. By sharing the refrigerant pipe as much as possible, one refrigerant branch pipe can ensure the workability, the reliability against the leakage of the refrigerant, and the diversion of the refrigerant, and the total length of the refrigerant pipe can be increased. To shorten it.

【0006】[0006]

【課題を解決するための手段】上記の目的を達成するた
めに、請求項1に係る発明が講じた手段は、図2に示す
ように、先ず、1台の室外ユニット(A)と、複数台の
室内ユニット(B〜F)とを備え、該各室内ユニット
(B〜F)を冷媒配管(42〜45)で並列に且つ上記
室外ユニット(A)に対して冷媒の循環可能に接続した
マルチ型式の空気調和装置を前提としている。そして、
上記室外ユニット(A)から複数台の室内ユニット(B
〜F)の近傍まで延びる一対の主冷媒配管(42,4
3)が設けられている。更に、複数台の室内ユニット
(B〜F)の近傍に配置され、上記主冷媒配管(42,
43)に接続される主流通口(40b,41h)を有す
ると共に、室内ユニット(B〜F)の台数以上の数の分
岐流通口(40i〜40n,41i〜41n)を有する
一対の冷媒分岐管(40,41)が設けられている。そ
の上、該各冷媒分岐管(40,41)の分岐流通口(4
0i〜40n,41i〜41n)と対応する各室内ユニ
ット(B〜F)とを接続する分岐冷媒配管(44…,4
5…)が設けられている。加えて、上記冷媒分岐管(4
0)における主流通口(40b)の端部には、切断可能
で且つ室外ユニット(A)の能力に対応した異なる径の
主冷媒配管(42)が接続可能な異径部(40s)が形
成されている。
Means for Solving the Problems In order to achieve the above object, the means taken by the invention according to claim 1 is, as shown in FIG. 2, first, one outdoor unit (A) and a plurality of outdoor units (A). The indoor units (B to F) are provided, and the indoor units (B to F) are connected in parallel by the refrigerant pipes (42 to 45) and to the outdoor unit (A) so that the refrigerant can circulate. It assumes a multi-type air conditioner. And
From the outdoor unit (A) to a plurality of indoor units (B
~ F) pair of main refrigerant pipes (42, 4)
3) is provided. Further, the main refrigerant pipes (42, 42) are arranged in the vicinity of the plurality of indoor units (B to F).
43) A pair of refrigerant branch pipes having main circulation ports (40b, 41h) connected to 43) and having branch circulation ports (40i-40n, 41i-41n) in number equal to or larger than the number of indoor units (B-F). (40, 41) are provided. In addition, the branch flow port (4) of each of the refrigerant branch pipes (40, 41).
0i to 40n, 41i to 41n) and branch refrigerant pipes (44 ..., 4) for connecting the corresponding indoor units (B to F)
5 ...) are provided. In addition, the refrigerant branch pipe (4
At the end of the main flow port (40b) in 0), a different diameter portion (40s) is formed which can be cut and to which the main refrigerant pipes (42) having different diameters corresponding to the capacity of the outdoor unit (A) can be connected. Has been done.

【0007】また、請求項2に係る発明が講じた手段
は、上記請求項1の発明において、大能力の室外ユニッ
ト(A)の使用時には、大径の冷媒配管(42)を異径
部(40s)に接続する一方、小能力の室外ユニット
(A)の使用時には、上記異径部(40s)を切断した
後に小径の冷媒配管(42)をこの切断部に接続して使
用されるものである構成としている。
Further, the means taken by the invention according to claim 2 is that in the invention according to claim 1, when a large capacity outdoor unit (A) is used, the large diameter refrigerant pipe (42) is provided with a different diameter portion ( 40s), while the outdoor unit (A) of small capacity is used, it is used by cutting the different diameter portion (40s) and then connecting the small diameter refrigerant pipe (42) to this cutting portion. It has a certain structure.

【0008】また、請求項3に係る発明が講じた手段
は、上記請求項1又は2の発明において、冷媒分岐管
(40)における分岐流通口(40j,40l,40
n)を形成する分岐流通路(40d,40f,40h)
の端部には、切断可能で且つ室内ユニット(B…)の能
力に対応した異なる径の分岐冷媒配管(44…)が接続
可能な異径部(40p,40q,40r)が形成された
構成としている。
The means taken by the invention according to claim 3 is the same as the invention according to claim 1 or 2, wherein the branch flow ports (40j, 40l, 40) of the refrigerant branch pipe (40) are provided.
n) the branch flow passages (40d, 40f, 40h)
A different diameter portion (40p, 40q, 40r) which can be cut and to which branch refrigerant pipes (44 ...) Having different diameters corresponding to the capacity of the indoor unit (B ...) Can be connected is formed I am trying.

【0009】[0009]

【作用】上記の構成により、本発明では、冷媒分岐管
(40,41)は、主流通口(40b,41h)と複数
個の分岐流通口(40i〜40n,41i〜41n)と
を有してヘッダとして機能するので、冷媒は該冷媒分岐
管(40,41)のみで分岐,集合して、冷媒の分岐箇
所を最小限の1箇所に抑えることができる。その結果、
冷媒配管のロウ付け箇所数が減って、冷媒洩れに対する
信頼性が高くなると共に、施工費用も低減される。しか
も、冷媒の分岐箇所は冷媒分岐管(40,41)で一箇
所であるので、複数台の室内ユニット(B〜F)へはほ
ぼその能力に応じた量の冷媒が供給されて、冷媒の偏流
が可及的に防止される。
With the above structure, in the present invention, the refrigerant branch pipe (40, 41) has a main flow port (40b, 41h) and a plurality of branch flow ports (40i-40n, 41i-41n). Since the refrigerant functions as a header, the refrigerant can be branched and collected only by the refrigerant branch pipes (40, 41), and the branching point of the refrigerant can be suppressed to a minimum of one. as a result,
The number of brazing points of the refrigerant pipe is reduced, the reliability against refrigerant leakage is improved, and the construction cost is reduced. Moreover, since the branching point of the refrigerant is only one point in the refrigerant branch pipes (40, 41), the plurality of indoor units (B to F) are supplied with the refrigerant in an amount substantially corresponding to the capacity of the indoor units (B to F). Drift is prevented as much as possible.

【0010】しかも、上記冷媒分岐管(40,41)
は、複数台の室内ユニット(B〜F)の近傍に配置され
ていて、複数台の室内ユニット(B〜F)への冷媒は一
本の主冷媒配管(42,43)内で集合してその近傍ま
で流通した後、冷媒分岐管(40,41)から分流して
分岐冷媒配管(44…,45…)介して各室内ユニット
(B〜F)に流通するので、該冷媒分岐管(40,4
1)から各室内ユニット(B〜F)への冷媒配管長が各
々可及的に短く短縮される。
Moreover, the refrigerant branch pipes (40, 41)
Are arranged in the vicinity of the plurality of indoor units (B to F), and the refrigerant to the plurality of indoor units (B to F) collects in one main refrigerant pipe (42, 43). After flowing to the vicinity thereof, the refrigerant is branched from the refrigerant branch pipes (40, 41) and distributed to each indoor unit (B to F) via the branch refrigerant pipes (44 ..., 45 ...) , 4
The refrigerant piping length from 1) to each indoor unit (B to F) is shortened as short as possible.

【0011】更に、上記冷媒分岐管(40)における主
流通口(40b)の端部には異径部(40s)を形成し
ているので、室外ユニット(A)の能力に対応した異な
る径の主冷媒配管(42)を接続することができる。
Furthermore, since the different diameter portion (40s) is formed at the end of the main flow port (40b) in the refrigerant branch pipe (40), the different diameter corresponding to the capacity of the outdoor unit (A). A main refrigerant pipe (42) can be connected.

【0012】また、上記冷媒分岐管(40)における分
岐流通路(40d,40f,40h)の端部に異径部
(40p,40q,40r)を形成すると、室内ユニッ
ト(B…)の能力に対応した異なる径の分岐冷媒配管
(44…)を接続することができる。
Further, if the different diameter portions (40p, 40q, 40r) are formed at the ends of the branch flow passages (40d, 40f, 40h) in the refrigerant branch pipe (40), the capacity of the indoor unit (B ...) Will be improved. Corresponding branch refrigerant pipes (44 ...) With different diameters can be connected.

【0013】[0013]

【実施例】以下、本発明の実施例を図面に基づいて詳細
に説明する。
Embodiments of the present invention will now be described in detail with reference to the drawings.

【0014】第1図は本発明に係るマルチ型式の空気調
和機の冷媒配管系統を示し、(A)は、例えば、高層ビ
ルの屋上に配置された1台の室外ユニット、(B〜F)
は、各々高層ビルの各室内に配置される同一内部構成の
複数台(5台)の室内ユニットである。
FIG. 1 shows a refrigerant piping system of a multi-type air conditioner according to the present invention. (A) shows, for example, one outdoor unit arranged on the roof of a high-rise building, (B to F).
Are a plurality of (five) indoor units each having the same internal configuration and arranged in each room of a high-rise building.

【0015】上記室外ユニット(A)の内部には、互い
に並列に接続された第1圧縮機(1)及び第2圧縮機
(2)と、四路切換弁(3)と、室外送風ファン(4a)を
有する室外熱交換器(4)と、膨張弁(5)とが備えら
れ、該各機器(1〜5)は各々冷媒配管(6…)で冷媒
の流通可能に接続されている。
Inside the outdoor unit (A), a first compressor (1) and a second compressor (2) connected in parallel with each other, a four-way switching valve (3), and an outdoor blower fan ( An outdoor heat exchanger (4) having 4a) and an expansion valve (5) are provided, and each of the devices (1 to 5) is connected by a refrigerant pipe (6) so that the refrigerant can flow.

【0016】また、上記各室内ユニット(B〜F)は、
各々、室内送風ファン(10a)を有する室内熱交換器
(10)と、空調能力調整用の室内電動膨張弁(11)
とを備え、該各機器(10,11)は冷媒配管(12
…)で冷媒の流通可能に接続されている。
The indoor units (B to F) are
An indoor heat exchanger (10) each having an indoor blower fan (10a), and an indoor electric expansion valve (11) for adjusting the air conditioning capacity.
And each of the devices (10, 11) includes a refrigerant pipe (12
...) so that the refrigerant can flow.

【0017】そして、上記5台の室内ユニット(B〜
F)の近傍には、ガス側の冷媒分岐管(40)と、液側
の冷媒分岐管(41)とが配置され、該各冷媒分岐管
(40,41)は、各々配管長の長い主冷媒配管(4
2,43)を介して上記室外ユニット(A)に接続され
ていると共に、各々室内ユニット(B〜F)の台数に対
応した5本の分岐冷媒配管(44…,45…)を介して
各々上記5台の室内ユニット(B〜F)に接続されてい
る。よって、該各冷媒分岐管(40,41)により、各
室内ユニット(B〜F)でもって室外ユニット(A)に
対して冷媒の循環可能に接続されて冷媒循環系統(1
4)が形成されている。
The above five indoor units (B to
In the vicinity of F), a gas-side refrigerant branch pipe (40) and a liquid-side refrigerant branch pipe (41) are arranged, and each refrigerant branch pipe (40, 41) has a long pipe length. Refrigerant piping (4
2, 43) to the outdoor unit (A) and five branch refrigerant pipes (44 ..., 45 ...) corresponding to the number of indoor units (B-F) respectively. It is connected to the above-mentioned five indoor units (B to F). Therefore, the refrigerant branch pipes (40, 41) are connected to the outdoor unit (A) by the indoor units (B to F) so that the refrigerant can circulate, and the refrigerant circulation system (1
4) is formed.

【0018】而して、冷房運転時には、四路切換弁
(3)を図中破線の如く切換えて冷媒を図中破線矢印の
如く循環させることにより、各室内熱交換器(10…)
で室内から吸熱した熱量を室外熱交換器(4)で外気に
放熱することを繰返して各室内を冷房する一方、暖房運
転時には、四路切換弁(3)を図中実線の如く切換えて
冷媒を図中実線矢印の如く循環させることにより、熱量
の授受を上記とは逆にして、室内を暖房するようにして
いる。
During the cooling operation, the four-way switching valve (3) is switched as indicated by the broken line in the drawing to circulate the refrigerant as indicated by the broken arrow in the drawing, whereby each indoor heat exchanger (10 ...) Is circulated.
The indoor heat exchanger (4) repeatedly radiates the amount of heat absorbed from the room to the outside air to cool each room, while the four-way switching valve (3) is switched as shown by the solid line in the figure during heating operation. Is circulated as indicated by the solid line arrow in the figure, so that the heat quantity is exchanged in the opposite manner to heat the room.

【0019】次に、上記一対の冷媒分岐管(40,4
1)の具体的構成を詳述する前に、上記室外ユニット
(A)の残部について説明すると、第1圧縮機(1)に
はインバータ(15)が接続されていて、圧縮機(1)
の運転周波数の高低調整によりその容量が複数段階に増
減調整されると共に、第2圧縮機(2)はアンロード機
構(2a)を有し、該アンロード機構(2a)は、その
パイロット圧導入通路(16)のパイロット電磁弁(1
7)の閉時に高圧が作用して第2圧縮機(2)の容量を
フルロードにする一方、パイロット電磁弁(17)の開
時には低圧が作用して第2圧縮機(2)の容量を50%
にアンロードするものである。
Next, the pair of refrigerant branch pipes (40, 4)
Before describing the specific configuration of 1) in detail, the rest of the outdoor unit (A) will be described. An inverter (15) is connected to the first compressor (1), and the compressor (1) is connected.
The capacity is increased / decreased in multiple stages by adjusting the operating frequency of the second compressor, and the second compressor (2) has an unload mechanism (2a), and the unload mechanism (2a) introduces the pilot pressure. Pilot solenoid valve (1 in passage (16)
When 7) is closed, high pressure acts to make the capacity of the second compressor (2) full load, while when pilot solenoid valve (17) is opened, low pressure acts to increase the capacity of the second compressor (2). 50%
To unload.

【0020】また、室外ユニット(A)において、(2
0)は四路切換弁(3)前後の冷媒配管(6,6)(吐
出管と吸入管)とを接続する均圧ホットガスバイパス回
路であって、該バイパス回路(20)には、冷房運転状
態での低負荷時及び室外熱交換器(4)の除霜運転時等
に開作動するホットガス電磁弁(21)が介設されてい
る。
In the outdoor unit (A), (2
Reference numeral 0) is a pressure equalizing hot gas bypass circuit that connects the refrigerant pipes (6, 6) (the discharge pipe and the suction pipe) before and after the four-way switching valve (3), and the bypass circuit (20) has a cooling system. A hot gas solenoid valve (21) that is opened during a low load in an operating state and during a defrosting operation of the outdoor heat exchanger (4) is provided.

【0021】さらに、(22)は暖房運転時に吐出管と
なる冷媒配管(6)に接続された暖房過負荷時バイパス
回路であって、該バイパス回路(22)には、補助コン
デンサ(23)及び、冷媒の高圧時に開く高圧制御弁(2
4)が介設されており、暖房過負荷時に圧縮機(1,2)
からの冷媒を該バイパス回路(22)を介して各室内熱
交換器(10…)をバイパスして、各室内熱交換器(1
0…)下流側の冷媒配管(6)にバイパスするようにし
ている。
Further, (22) is a heating overload bypass circuit connected to a refrigerant pipe (6) serving as a discharge pipe during heating operation, and the bypass circuit (22) includes an auxiliary capacitor (23) and an auxiliary capacitor (23). , High pressure control valve (2
4) is installed, and the compressor (1, 2) is provided at the time of heating overload.
The refrigerant from the indoor heat exchanger (1) is bypassed through the bypass circuit (22) to the indoor heat exchangers (10 ...).
0 ...) Bypasses to the refrigerant pipe (6) on the downstream side.

【0022】加えて、(25)は上記暖房過負荷時バイ
パス回路(22)の補助コンデンサ(23)下流側を、
四路切換弁(3)下流側の冷媒配管(6)(吸入管)に接続
するリキッドインジェクションバイパス回路であって、
該リキッドインジェクションバイパス回路(25)には
圧縮機(1,2)の作動に連動して開閉するインジェク
ション用電磁弁(26)と、膨張弁(27)とが介設さ
れている。
In addition, (25) is the auxiliary capacitor (23) downstream side of the heating overload bypass circuit (22),
A liquid injection bypass circuit connected to the refrigerant pipe (6) (suction pipe) on the downstream side of the four-way switching valve (3),
The liquid injection bypass circuit (25) is provided with an injection solenoid valve (26) that opens and closes in conjunction with the operation of the compressors (1, 2) and an expansion valve (27).

【0023】また、(30)はレシーバ、(31)はア
キュムレータ、(32)は過冷却コイル、(33)は油
分離器であって、該油分離器(33)で分離された潤滑
油は油通路(34)を介して両圧縮機(1,2)に戻さ
れる。
Further, (30) is a receiver, (31) is an accumulator, (32) is a supercooling coil, (33) is an oil separator, and the lubricating oil separated by the oil separator (33) is It is returned to both compressors (1, 2) via an oil passage (34).

【0024】次に、上記ガス側の冷媒分岐管(40)の
具体的構成を第2図に示す。同図において、ガス側の冷
媒分岐管(40)は、一端が閉じた大径の主流通路(4
0a)を有し、該主流通路(40a)の他端には、上記
室外ユニット(A)に連通する主冷媒配管(42)に接
続される主流通口(40b)が形成されている。
Next, FIG. 2 shows a specific structure of the refrigerant branch pipe (40) on the gas side. In the figure, the gas-side refrigerant branch pipe (40) has a large-diameter main flow passage (4
0a) and a main flow port (40b) connected to the main refrigerant pipe (42) communicating with the outdoor unit (A) is formed at the other end of the main flow passage (40a).

【0025】また、上記主流通路(40a)の側部に
は、図中左側から順に第1ないし第6の比較的小径の分
岐流通路(40c〜40h)が該主流通路(40a)と
直行して接続され、該各分岐流通路(40c〜40h)
の端部には、各々分岐流通口(40i〜40n)が形成
され、そのうち5個の上記分岐流通口(40i〜40
m)は、上記各室内ユニット(B〜F)への各冷媒配管
(44…)に接続されている。
Further, first to sixth relatively small diameter branch flow passages (40c to 40h) are arranged directly on the side portion of the main flow passage (40a) in the order from the left side in the figure to the main flow passage (40a). Connected by the branch flow passages (40c to 40h)
Branch circulation ports (40i to 40n) are formed at the end of each of the five branch circulation ports (40i to 40n).
m) is connected to each refrigerant pipe (44 ...) To each indoor unit (B to F).

【0026】また、上記偶数番目の分岐流通路(40
d,40f,40h)の端部近傍には、端部よりも若干
内側にその径よりも若干大径の異径部(40p,40
q,40r)が各々形成されていると共に、上記主流通
口(40b)の端部にも、その径よりも若干大径の異径
部(40s)が形成されている。
The even-numbered branch flow passages (40
d, 40f, 40h) in the vicinity of the ends of the different diameter portions (40p, 40) slightly inward of the ends and slightly larger than the diameter thereof.
q, 40r), and a different diameter portion (40s) slightly larger than the diameter is also formed at the end of the main flow port (40b).

【0027】すなわち、この各異径部の形成は、室外ユ
ニット(A)の能力(圧縮機(1)及び(2)の容量)
の種類と、室内ユニット(B〜F)の能力の種類との相
違に対応するものであり、能力が大きくなると各冷媒配
管(42〜45)の径も大きくなる関係上、大能力の室
外ユニット(A)が使用された場合には、第4図(イ)
に示す如く、大径の主冷媒配管(42)を異径部(40
s)に挿入接続する一方、小能力の室外ユニット(A)
が使用された場合には、同図(ロ)に示す如く、異径部
(40s)を切断した後に小径の主冷媒配管(42)を
この切断部に挿入接続する。
That is, the formation of the different diameter portions is performed by the capacity of the outdoor unit (A) (capacity of the compressors (1) and (2)).
And the type of capacity of the indoor units (B to F), and the larger the capacity, the larger the diameter of each refrigerant pipe (42 to 45). When (A) is used, it is shown in FIG.
As shown in, the large-diameter main refrigerant pipe (42) is connected to the different-diameter portion (40
outdoor unit (A) with small capacity while being inserted and connected to
When the is used, as shown in (b) of the same figure, after cutting the different diameter portion (40s), the small-diameter main refrigerant pipe (42) is inserted and connected to this cutting portion.

【0028】同様に、小能力の室内ユニット(B等)が
使用された場合には、第5図(イ)に示す如く、小径の
分岐冷媒配管(44)を分岐流通路(40d等)の端部
に挿入し、異径部(40p等)の前端部に形成した位置
決め用の突起部(40t)で位置決め支持して接続する
一方、大能力の室内ユニット(B等)が使用された場合
には、同図(ロ)に示す如く、異径部(40p)をその
中央部位で切断した後に該異径部(40p)に大径の分
岐冷媒配管(44)を挿入接続する。
Similarly, when a small capacity indoor unit (B, etc.) is used, the small diameter branch refrigerant pipe (44) is connected to the branch flow passage (40d, etc.) as shown in FIG. When a large-capacity indoor unit (B etc.) is used while being inserted into the end and positioned and supported by a positioning protrusion (40t) formed at the front end of the different diameter part (40p etc.) As shown in FIG. 6B, a different-diameter portion (40p) is cut at its central portion, and then a large-diameter branched refrigerant pipe (44) is inserted and connected to the different-diameter portion (40p).

【0029】以上の構成により、室外,室内の各ユニッ
トの能力の大小に応じて別部材の異径ソケット等を用い
て冷媒配管を接続する場合に比べて、部品点数が少なく
なって低価格化が可能であるとともに、ロウ付け箇所数
が低減されて、施工費の低減及び冷媒洩れに対する信頼
性の向上を図ることができる。
With the above construction, the number of parts is reduced and the cost is reduced as compared with the case where the refrigerant pipes are connected by using different diameter sockets or the like which are different members depending on the capacity of each unit inside and outside the room. In addition, it is possible to reduce the number of brazing points, reduce the construction cost, and improve the reliability against refrigerant leakage.

【0030】また、上記液側の冷媒分岐管(41)は、
第3図(イ)に示す如く、ガス側の冷媒分岐管(40)
と同様に、一端が閉じた大径の主流通路(41a)と、
該主流通路(41a)の側部にて該主流通路(41a)
と直行する比較的小径の6つの分岐流通路(41b〜4
1g)とを有する。
The liquid side refrigerant branch pipe (41) is
As shown in FIG. 3 (a), the gas side refrigerant branch pipe (40)
Similarly, a large diameter main flow passage (41a) with one end closed,
The main flow passage (41a) at the side of the main flow passage (41a)
6 branch flow passages (41b-4
1 g).

【0031】そして、上記主流通路(41a)の端部に
は、上記室外ユニット(A)に主冷媒配管(43)を介して
連通する主流通口(41h)が形成されていると共に、
上記各分岐流通路(41b〜41g)の端部には、各々
分岐流通口(41i〜41n)が形成され、そのうち5
個の分岐流通口(41i〜41m)は、各室内ユニット
(B〜F)に各分岐冷媒配管(45…)を介して連通さ
れている。
A main flow port (41h) communicating with the outdoor unit (A) via the main refrigerant pipe (43) is formed at the end of the main flow passage (41a), and
Branch flow ports (41i to 41n) are formed at the ends of the branch flow passages (41b to 41g).
The individual branch flow ports (41i to 41m) are connected to the indoor units (B to F) through the branch refrigerant pipes (45 ...).

【0032】尚、上記各分岐流通路(41b〜41g)
は、同図(ロ)に示す如く、冷媒分岐管(41)の載置
時にこれが倒れないよう、く字状に形成されている。
The branch flow passages (41b to 41g) are provided.
As shown in (b) of the figure, is formed in a V shape so that the refrigerant branch pipe (41) does not fall when it is placed.

【0033】したがって、上記実施例においては、例え
ば暖房運転時、冷媒循環系統(14)の冷媒は、ガス側
の冷媒分岐管(40)のみで分岐して各室内ユニット
(B〜F)に流通して各室内熱交換器(凝縮器)(1
0)で凝縮すると共に、液側の冷媒分岐管(41)のみ
で集合して室外ユニット(A)に戻って室外熱交換器
(蒸発器)(4)で蒸発することを繰返し、室内は良好に暖
房空調される。
Therefore, in the above embodiment, for example, during the heating operation, the refrigerant in the refrigerant circulation system (14) is branched only by the refrigerant side branch pipe (40) on the gas side and flows into each indoor unit (B to F). Then, each indoor heat exchanger (condenser) (1
0) and condensed only at the liquid side refrigerant branch pipe (41), returned to the outdoor unit (A) and evaporated in the outdoor heat exchanger (evaporator) (4) repeatedly, and the room is good. Is heated and air conditioned.

【0034】その際、ガス側及び液側の冷媒分岐管(4
0,41)は、各々主流通口(40b,41h)を有す
る主流通路(40a,41a)に対して6個の分岐流通
口(40i〜40n,41i〜41n)を備えてヘッダ
として機能するので、空気調和機の施工の際には、5台
の室内ユニット(B〜F)の接続に対して二股分岐管を
複数個用いる場合に比べて、分岐管点数を減少させて、
施工費用及び施工工数の低減を図ることができる。
At this time, the gas side and liquid side refrigerant branch pipes (4
0, 41) has six branch flow ports (40i-40n, 41i-41n) for the main flow passages (40a, 41a) each having a main flow port (40b, 41h), and thus functions as a header. At the time of construction of the air conditioner, the number of branch pipes is reduced as compared with the case where a plurality of bifurcated branch pipes are used for connecting five indoor units (B to F),
The construction cost and construction man-hours can be reduced.

【0035】しかも、それに伴い冷媒配管のロウ付け箇
所数が減り、冷媒洩れに対する信頼性が向上する。ま
た、分岐箇所数の低減に伴い冷媒の偏流が有効に抑制さ
れて、各室内ユニット(B〜F)への冷媒量がほぼその
能力に応じた冷媒量になる。
Moreover, the number of brazing points of the refrigerant pipe is reduced accordingly, and the reliability against refrigerant leakage is improved. Further, as the number of branch points is reduced, the uneven flow of the refrigerant is effectively suppressed, and the amount of the refrigerant to each of the indoor units (B to F) becomes substantially the amount of the refrigerant according to its capacity.

【0036】さらに、室外ユニット(A)と各室内ユニ
ット(B〜F)との間の距離は長いものの、両冷媒分岐
管(40,41)が、室内ユニット(B〜F)の近傍に
配置されているので、室外ユニット(A)から各冷媒分
岐管(40,41)までの主冷媒配管(42,43)を
長く共用して、該各冷媒分岐管(40,41)から5台
の室内ユニット(B〜F)への分岐冷媒配管(44…,
45…)の長さを可及的に短縮できる。
Further, although the distance between the outdoor unit (A) and each indoor unit (B to F) is long, both refrigerant branch pipes (40, 41) are arranged in the vicinity of the indoor unit (B to F). Therefore, the main refrigerant pipes (42, 43) from the outdoor unit (A) to the respective refrigerant branch pipes (40, 41) are shared for a long time, and five units are connected from the respective refrigerant branch pipes (40, 41). Branch refrigerant pipes (44 ..., To the indoor units (B to F))
45 ...) can be shortened as much as possible.

【0037】よって、ヘッダとしての冷媒分岐管(4
0,41)を使用して施工性、冷媒洩れに対する信頼
性、及び冷媒の分配性の向上を図りつつ、冷媒分岐管
(40,41)から各室内ユニット(B〜F)への冷媒
配管長を可及的に短縮できる効果を発揮できる。
Therefore, the refrigerant branch pipe (4
0, 41) to improve workability, reliability against refrigerant leakage, and refrigerant dispersibility, and the refrigerant pipe length from the refrigerant branch pipe (40, 41) to each indoor unit (B to F). The effect of shortening as much as possible can be exhibited.

【0038】尚、上記実施例では、5台の室内ユニット
(B〜F)を設けたが、台数は5台に限定されず、複数
台であればよいのは勿論である。
Although the five indoor units (B to F) are provided in the above embodiment, the number of indoor units is not limited to five, and it goes without saying that a plurality of units may be used.

【0039】[0039]

【発明の効果】従って、本発明によれば、上記複数台の
室内ユニットへの冷媒分流機能を有する冷媒分岐管を、
1つの主流通口と複数の分岐流通口とを有するヘッダで
構成し、該冷媒分岐管を上記複数台の室内ユニット近傍
に配置したために、分岐管点数を低減して、施工性、冷
媒洩れに対する信頼性、及び冷媒の分配姓の向上を図り
つつ、冷媒分岐管から各室内ユニットへの冷媒配管長を
可及的に短く短縮できる。
Therefore, according to the present invention, a refrigerant branch pipe having a function of dividing the refrigerant into the plurality of indoor units is provided.
It is composed of a header having one main flow port and a plurality of branch flow ports, and the refrigerant branch pipes are arranged in the vicinity of the plurality of indoor units, so that the number of branch pipes is reduced and workability and refrigerant leakage are prevented. The refrigerant pipe length from the refrigerant branch pipe to each indoor unit can be shortened as short as possible while improving reliability and refrigerant distribution.

【0040】特に、上記冷媒分岐管の主流通口に異径部
を形成したために、設置される室外ユニットの能力の大
小に応じて異径ソケット等を用いて接続する必要が無
く、低価格化を図ることができると共に、ロウ付け箇所
数を低減して施工費の削減や冷媒洩れに対する信頼性の
向上を図ることができる。
In particular, since a different diameter portion is formed in the main flow port of the refrigerant branch pipe, it is not necessary to connect using a different diameter socket or the like depending on the capacity of the outdoor unit to be installed, and the cost is reduced. In addition to reducing the number of brazing points, it is possible to reduce construction costs and improve reliability against refrigerant leakage.

【0041】また、上記冷媒分岐管の分岐流通口に異径
部を形成すると、設置される室内ユニットの能力の大小
に応じて異径ソケット等を用いて接続する必要が無く、
より低価格化を図ることができると共に、ロウ付け箇所
数を低減して施工費の削減や冷媒洩れに対する信頼性の
向上を図ることができる。
Further, when the different diameter portion is formed at the branch flow port of the refrigerant branch pipe, it is not necessary to connect using a different diameter socket or the like depending on the capacity of the installed indoor unit,
The cost can be further reduced, and the number of brazing points can be reduced to reduce the construction cost and improve the reliability against refrigerant leakage.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例を示す冷媒配管系統図である。FIG. 1 is a refrigerant piping system diagram showing an embodiment of the present invention.

【図2】ガス側の冷媒分岐管の正面図である。FIG. 2 is a front view of a refrigerant branch pipe on a gas side.

【図3】(イ)及び(ロ)は各々液側の冷媒分岐管の正
面図及び側面図である。
3A and 3B are a front view and a side view of a liquid-side refrigerant branch pipe, respectively.

【図4】(イ)及び(ロ)は配管径の異なる冷媒配管と
冷媒分岐管の主流通路との接続の様子を示す説明図であ
る。
4 (a) and (b) are explanatory diagrams showing a connection state between a refrigerant pipe having a different pipe diameter and a main flow passage of a refrigerant branch pipe.

【図5】(イ)及び(ロ)は配管径の異なる冷媒配管と
冷媒分岐管の分岐流通路との接続の様子を示す説明図で
ある。
5 (a) and 5 (b) are explanatory views showing how the refrigerant pipes having different pipe diameters are connected to the branch flow passage of the refrigerant branch pipe.

【図6】従来例を示す冷媒配管の接続状態を示す図であ
る。
FIG. 6 is a diagram showing a connection state of refrigerant pipes showing a conventional example.

【符号の説明】[Explanation of symbols]

A 室外ユニット B〜F 室内ユニット 40 ガス側の冷媒分岐管 41 液側の冷媒分岐管 40a,41a 主流通路 40b〜41h 主流通口 40c〜40r,41b〜41g 分岐流通路 40i〜40n,41i〜41n 分岐流通口 40p,40q,40r,40s 異径部 42,43 主冷媒配管 44,45 分岐冷媒配管 A outdoor unit B to F indoor unit 40 gas side refrigerant branch pipe 41 liquid side refrigerant branch pipe 40a, 41a main flow passage 40b to 41h main flow ports 40c to 40r, 41b to 41g branch flow passage 40i to 40n, 41i to 41n Branch flow port 40p, 40q, 40r, 40s Different diameter part 42, 43 Main refrigerant pipe 44, 45 Branch refrigerant pipe

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 1台の室外ユニット(A)と、複数台の
室内ユニット(B〜F)とを備え、該各室内ユニット
(B〜F)を冷媒配管(42〜45)で並列に且つ上記
室外ユニット(A)に対して冷媒の循環可能に接続した
マルチ型式の空気調和装置であって、 上記室外ユニット(A)から複数台の室内ユニット(B
〜F)の近傍まで延びる一対の主冷媒配管(42,4
3)と、 複数台の室内ユニット(B〜F)の近傍に配置され、上
記主冷媒配管(42,43)に接続される主流通口(4
0b,41h)を有すると共に、室内ユニット(B〜
F)の台数以上の数の分岐流通口(40i〜40n,4
1i〜41n)を有する一対の冷媒分岐管(40,4
1)と、 該各冷媒分岐管(40,41)の分岐流通口(40i〜
40n,41i〜41n)と対応する各室内ユニット
(B〜F)とを接続する分岐冷媒配管(44…,45
…)とを備え、 上記冷媒分岐管(40)における主流通口(40b)の
端部には、切断可能で且つ室外ユニット(A)の能力に
対応した異なる径の主冷媒配管(42)が接続可能な異
径部(40s)が形成されていることを特徴とする空気
調和装置。
1. An outdoor unit (A) and a plurality of indoor units (B-F) are provided, and the indoor units (B-F) are arranged in parallel by refrigerant pipes (42-45). A multi-type air conditioner connected to the outdoor unit (A) so that a refrigerant can circulate, wherein a plurality of indoor units (B) are provided from the outdoor unit (A).
~ F) pair of main refrigerant pipes (42, 4)
3) and a main flow port (4) arranged near the plurality of indoor units (B to F) and connected to the main refrigerant pipes (42, 43).
0b, 41h), and an indoor unit (B ~
F) the number of branch distribution ports (40i-40n, 4 or more)
1i to 41n) having a pair of refrigerant branch pipes (40, 4)
1) and the branch flow ports (40i-) of the respective refrigerant branch pipes (40, 41).
40n, 41i to 41n) and branch refrigerant pipes (44 ..., 45) connecting the corresponding indoor units (B to F).
...), and a main refrigerant pipe (42) having a different diameter which can be cut and has a different diameter corresponding to the capacity of the outdoor unit (A) is provided at the end of the main flow port (40b) of the refrigerant branch pipe (40). An air conditioner characterized in that a connectable different-diameter portion (40s) is formed.
【請求項2】 請求項1記載の空気調和装置において、 大能力の室外ユニット(A)の使用時には、大径の冷媒
配管(42)を異径部(40s)に接続する一方、 小能力の室外ユニット(A)の使用時には、上記異径部
(40s)を切断した後に小径の冷媒配管(42)をこ
の切断部に接続して使用されるものであることを特徴と
する空気調和装置。
2. The air conditioner according to claim 1, wherein when the large capacity outdoor unit (A) is used, the large diameter refrigerant pipe (42) is connected to the different diameter portion (40s) while the small capacity is used. An air conditioner characterized in that, when the outdoor unit (A) is used, a refrigerant pipe (42) having a small diameter is connected to the cut portion after cutting the different diameter portion (40s).
【請求項3】 請求項1又は2記載の空気調和装置にお
いて、 冷媒分岐管(40)における分岐流通口(40j,40
l,40n)を形成する分岐流通路(40d,40f,
40h)の端部には、切断可能で且つ室内ユニット(B
…)の能力に対応した異なる径の分岐冷媒配管(44
…)が接続可能な異径部(40p,40q,40r)が
形成されていることを特徴とする空気調和装置。
3. The air conditioner according to claim 1 or 2, wherein the branch flow ports (40j, 40) of the refrigerant branch pipe (40).
1, 40n) forming branch flow passages (40d, 40f,
At the end of 40h), the indoor unit (B
...) branch refrigerant pipes (44
The air conditioner is characterized in that different diameter portions (40p, 40q, 40r) that can be connected are formed.
JP7052860A 1995-03-13 1995-03-13 Air conditioner Expired - Lifetime JP2682500B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7052860A JP2682500B2 (en) 1995-03-13 1995-03-13 Air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7052860A JP2682500B2 (en) 1995-03-13 1995-03-13 Air conditioner

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP62059899A Division JP2745504B2 (en) 1987-03-14 1987-03-14 Air conditioner

Publications (2)

Publication Number Publication Date
JPH07280376A true JPH07280376A (en) 1995-10-27
JP2682500B2 JP2682500B2 (en) 1997-11-26

Family

ID=12926627

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
JP (1) JP2682500B2 (en)

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WO2014087659A1 (en) 2012-12-07 2014-06-12 ダイキン工業株式会社 Construction method for air conditioning device
WO2014087660A1 (en) 2012-12-07 2014-06-12 ダイキン工業株式会社 Piping unit for air conditioning device
WO2014087661A1 (en) * 2012-12-07 2014-06-12 ダイキン工業株式会社 Method for testing air tightness of air conditioning device
WO2019146502A1 (en) * 2018-01-29 2019-08-01 ダイキン工業株式会社 Air conditioning device
CN110145898A (en) * 2018-02-13 2019-08-20 中国中元国际工程有限公司 One kind returning liquid distributor and its application
JP2020204464A (en) * 2020-09-30 2020-12-24 ダイキン工業株式会社 Refrigerant branch unit

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AU2013356092B2 (en) * 2012-12-07 2016-04-14 Daikin Industries, Ltd. Construction method for air conditioning device
WO2014087660A1 (en) 2012-12-07 2014-06-12 ダイキン工業株式会社 Piping unit for air conditioning device
WO2014087661A1 (en) * 2012-12-07 2014-06-12 ダイキン工業株式会社 Method for testing air tightness of air conditioning device
JP2014115004A (en) * 2012-12-07 2014-06-26 Daikin Ind Ltd Air conditioner construction method
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WO2014087659A1 (en) 2012-12-07 2014-06-12 ダイキン工業株式会社 Construction method for air conditioning device
CN107655105A (en) * 2012-12-07 2018-02-02 大金工业株式会社 The construction method of 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
WO2019146502A1 (en) * 2018-01-29 2019-08-01 ダイキン工業株式会社 Air conditioning device
JP2019132575A (en) * 2018-01-29 2019-08-08 ダイキン工業株式会社 Air conditioning device
CN110145898A (en) * 2018-02-13 2019-08-20 中国中元国际工程有限公司 One kind returning liquid distributor and its application
JP2020204464A (en) * 2020-09-30 2020-12-24 ダイキン工業株式会社 Refrigerant branch unit

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