JP2004044930A - Outdoor unit of multi-chamber type air conditioner - Google Patents

Outdoor unit of multi-chamber type air conditioner Download PDF

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Publication number
JP2004044930A
JP2004044930A JP2002203853A JP2002203853A JP2004044930A JP 2004044930 A JP2004044930 A JP 2004044930A JP 2002203853 A JP2002203853 A JP 2002203853A JP 2002203853 A JP2002203853 A JP 2002203853A JP 2004044930 A JP2004044930 A JP 2004044930A
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Prior art keywords
refrigerant
air conditioner
outdoor unit
compressor
oil separator
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JP2002203853A
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Japanese (ja)
Inventor
Takahiro Matsunaga
松永 隆廣
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Fujitsu General Ltd
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Fujitsu General Ltd
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Priority to JP2002203853A priority Critical patent/JP2004044930A/en
Publication of JP2004044930A publication Critical patent/JP2004044930A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/07Details of compressors or related parts
    • F25B2400/075Details of compressors or related parts with parallel compressors

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  • Other Air-Conditioning Systems (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outdoor unit of a multi-chamber type air conditioner capable of suppressing the space for piping by simplifying a refrigerant passage. <P>SOLUTION: The outdoor unit of the multi-chamber type air conditioner includes a refrigeration circuit consisting of a plurality of compressor oil return bypasses 11-13 branched on the refrigerant discharge side of an oil separator 7 and connected with the refrigerant suction sides of the compressors 1a-1c arranged in line through a solenoid opening/closing valve 9 and a capillary tube 10 and a low-high pressure bypass 14 connected with the refrigerant suction side of an accumulator 6 through the solenoid opening/closing valve 9 and the capillary tube 10, wherein the branching part 8 on the refrigerant discharge side of the oil separator 7 is located immediately before the solenoid opening/closing valve 9. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、多室型空気調和機の室外機に係わり、より詳細には、冷媒経路を簡略化して配管の省スペース化をはかれるようにした構造に関する。
【0002】
【従来の技術】
従来の多室型空気調和機の室外機は、例えば図2(A)および図2(B)で示すように、並列に配置された第一圧縮機1a乃至第三圧縮機1cと、同第一圧縮機1a乃至同第三圧縮機1cの冷媒吐出側に設けられた四方弁2と、四方弁3と、複数の室外熱交換器4aおよび4bと、レシーバタンク5と、前記第一圧縮機1a乃至前記第三圧縮機1cの冷媒吸入側に設けられたアキュームレータ6と、前記第一圧縮機1a乃至前記第三圧縮機1cと前記四方弁2との間に設けられたオイルセパレータ7と、同オイルセパレータ7の冷媒吐出側の分岐部8で分岐され、電磁開閉弁9およびキャピラリチューブ10を介して前記第一圧縮機1aの冷媒吸入側に接続された第一圧縮機オイル戻しバイパス11と、前記オイルセパレータ7の冷媒吐出側の分岐部8で分岐され、電磁開閉弁9およびキャピラリチューブ10を介して前記第二圧縮機1bの冷媒吸入側に接続された第二圧縮機オイル戻しバイパス12と、前記オイルセパレータ7の冷媒吐出側の分岐部8で分岐され、電磁開閉弁9およびキャピラリチューブ10を介して前記第三圧縮機1cの冷媒吸入側に接続された第三圧縮機オイル戻しバイパス13と、前記オイルセパレータ7の冷媒吐出側の分岐部8で分岐され、電磁開閉弁9およびキャピラリチューブ10を介して前記アキュームレータ6の冷媒吸入側に接続された低圧ー高圧バイパス14とからなる冷媒回路を構成していた。
【0003】
しかしながら、前記分岐部8が前記オイルセパレータ7の近傍に設けられていることから、同分岐部8と前記電磁開閉弁9との間を接続する配管が長くなってしまうことから、他の配管との干渉を防ぐために広いスペースが必要になってしまうという問題点を有していた。
【0004】
【発明が解決しようとする課題】
本発明は、上記問題点に鑑み、冷媒経路を簡略化して配管の省スペース化をはかれるようにした多室型空気調和機の室外機を提供することを目的とする。
【0005】
【課題を解決するための手段】
本発明は、上記課題を解決するため、並列に配置された複数の圧縮機と、同複数の圧縮機の冷媒吐出側に設けられた四方弁と、室外熱交換器と、レシーバタンクと、前記複数の圧縮機の冷媒吸入側に設けられたアキュームレータと、前記複数の圧縮機と前記四方弁との間に設けられたオイルセパレータと、同オイルセパレータの冷媒吐出側で分岐され、電磁開閉弁およびキャピラリチューブを介して前記複数の圧縮機の冷媒吸入側に夫々接続された複数の圧縮機オイル戻しバイパスと、前記オイルセパレータの冷媒吐出側で分岐され、電磁開閉弁およびキャピラリチューブを介して前記アキュームレータの冷媒吸入側に接続された低圧ー高圧バイパスとからなる冷媒回路を構成してなる多室型空気調和機の室外機において、
前記オイルセパレータの冷媒吐出側の分岐部が、前記電磁開閉弁の直前に設けられた構成となっている。
【0006】
また、前記分岐部が、分岐管からなる構成となっている。
【0007】
更に、前記分岐部が、ヘッダーからなる構成となっている。
【0008】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいた実施例として詳細に説明する。
図1は本発明による多室型空気調和機の室外機の説明図で、(A)は冷媒回路を示す図であり、(B)は冷媒回路の一例を示す要部拡大図であり、(C)は冷媒回路の他の例を示す要部拡大図である。
【0009】
本発明による多室型空気調和機の室外機は、図1(A)で示すように、並列に配置された第一圧縮機1a、第二圧縮機1bおよび第三圧縮機1cと、これら第一圧縮機1a乃至第三圧縮機1cの冷媒吐出側に設けられた四方弁2と、四方弁3と、複数の室外熱交換器4aおよび4bと、レシーバタンク5と、前記第一圧縮機1a乃至前記第三圧縮機1cの冷媒吸入側に設けられたアキュームレータ6とで冷媒回路が構成されている。
【0010】
前記第一圧縮機1a乃至前記第三圧縮機1cと、前記四方弁2との間にはオイルセパレータ7が設けられ、同オイルセパレータ7の冷媒吐出側は後述する分岐部8で分岐され、電磁開閉弁9およびキャピラリチューブ10を介して前記第一圧縮機1aの冷媒吸入側に第一圧縮機オイル戻しバイパス11が接続されている。
【0011】
また、前記オイルセパレータ7の冷媒吐出側は後述する分岐部8で分岐され、電磁開閉弁9およびキャピラリチューブ10を介して前記第二圧縮機1bの冷媒吸入側に第二圧縮機オイル戻しバイパス12が接続されている。
【0012】
また、前記オイルセパレータ7の冷媒吐出側は後述する分岐部8で分岐され、電磁開閉弁9およびキャピラリチューブ10を介して前記第三圧縮機1cの冷媒吸入側に第三圧縮機オイル戻しバイパス13が接続されている。
【0013】
また同様に、前記オイルセパレータ7の冷媒吐出側は後述する分岐部8で分岐され、電磁開閉弁9およびキャピラリチューブ10を介して前記アキュームレータ6の冷媒吸入側に低圧ー高圧バイパス14が接続されている。
【0014】
そして、前記オイルセパレータ7の冷媒吐出側で、前記第一圧縮機オイル戻しバイパス11、前記第二圧縮機オイル戻しバイパス12、前記第三圧縮機オイル戻しバイパス13および前記低圧ー高圧バイパス14に夫々分岐するための前記分岐部8は、前記電磁開閉弁9の直前に設けられた構成となっている。
【0015】
これにより、前記分岐部8から前記電磁開閉弁9までの配管を効果的に短縮できるので、上記に説明した従来技術のように、他の配管との干渉を防ぐために広いスペースが必要になってしまうということがなくなり、冷媒回路を簡略化させることができるようになってコスト的に有利な構造となる。
【0016】
なお、前記分岐部8は、一例として図1(B)で示すように、前記電磁開閉弁9の直前に設けた分岐管15からなる構成となっており、または、他の例として図1(C)で示すように、前記電磁開閉弁9の直前に設けたヘッダー16からなる構成となっており、これらにより、前記オイルセパレータ7から前記分岐管15または前記ヘッダー16までの配管が長くなり、上記した夫々のバイパス11乃至14が占めるスペースが小さくなって、多室型空気調和機の室外機としての冷媒回路を簡略化できることになる。
【0017】
なお、一例として図1(B)で示した前記分岐管15と、他の例として図1(C)で示した前記ヘッダー16とは、設計上の観点から何れかを選択的に採用すればよい。
【0018】
【発明の効果】
以上説明したように、本発明によると、冷媒経路を簡略化して配管の省スペース化をはかれるようにした多室型空気調和機の室外機となる。
【図面の簡単な説明】
【図1】本発明による多室型空気調和機の室外機の説明図で、(A)は冷媒回路を示す図であり、(B)は冷媒回路の一例を示す要部拡大図であり、(C)は冷媒回路の他の例を示す要部拡大図である。
【図2】従来例による多室型空気調和機の室外機の説明図で、(A)は冷媒回路を示す図であり、(B)は冷媒回路の要部拡大図である。
【符号の説明】
1a 第一圧縮機
1b 第二圧縮機
1c 第三圧縮機
2 四方弁
3 四方弁
4a,4b 室外熱交換器
5 レシーバタンク
6 アキュムレータ
7 オイルセパレータ
8 分岐部
9 電磁開閉弁
10 キャピラリチューブ
11 第一圧縮機オイル戻しバイパス
12 第二圧縮機オイル戻しバイパス
13  第三圧縮機オイル戻しバイパス
14 低圧ー高圧バイパス
15 分岐管
16 ヘッダー
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an outdoor unit of a multi-room air conditioner, and more particularly, to a structure that simplifies a refrigerant path to save piping space.
[0002]
[Prior art]
As shown in FIGS. 2A and 2B, for example, an outdoor unit of a conventional multi-room air conditioner includes first to third compressors 1a to 1c arranged in parallel, and A four-way valve 2, a four-way valve 3, a plurality of outdoor heat exchangers 4a and 4b, a receiver tank 5, and a first compressor 1a provided on the refrigerant discharge side of the first compressor 1a to the third compressor 1c. An accumulator 6 provided on the refrigerant suction side of the first compressor 1a to the third compressor 1c; an oil separator 7 provided between the first compressor 1a to the third compressor 1c and the four-way valve 2; A first compressor oil return bypass 11 branched at a branch portion 8 on the refrigerant discharge side of the oil separator 7 and connected to a refrigerant suction side of the first compressor 1a via an electromagnetic on-off valve 9 and a capillary tube 10; , The refrigerant discharge side of the oil separator 7 A second compressor oil return bypass 12 branched by a branch portion 8 and connected to a refrigerant suction side of the second compressor 1b via an electromagnetic on-off valve 9 and a capillary tube 10; and a refrigerant discharge side of the oil separator 7 And a third compressor oil return bypass 13 connected to a refrigerant suction side of the third compressor 1c via an electromagnetic on-off valve 9 and a capillary tube 10 and a refrigerant discharge from the oil separator 7. And a low-pressure / high-pressure bypass 14 connected to the refrigerant suction side of the accumulator 6 via an electromagnetic on-off valve 9 and a capillary tube 10.
[0003]
However, since the branch portion 8 is provided in the vicinity of the oil separator 7, a pipe connecting the branch portion 8 and the electromagnetic on-off valve 9 becomes long, and therefore, the branch portion 8 is provided with another pipe. However, there is a problem that a large space is required in order to prevent interference.
[0004]
[Problems to be solved by the invention]
In view of the above problems, an object of the present invention is to provide an outdoor unit of a multi-room air conditioner that simplifies a refrigerant path and saves piping space.
[0005]
[Means for Solving the Problems]
The present invention, in order to solve the above problems, a plurality of compressors arranged in parallel, a four-way valve provided on the refrigerant discharge side of the plurality of compressors, an outdoor heat exchanger, a receiver tank, Accumulators provided on the refrigerant suction side of the plurality of compressors, an oil separator provided between the plurality of compressors and the four-way valve, and a branch on the refrigerant discharge side of the oil separator, an electromagnetic on-off valve and A plurality of compressor oil return bypasses respectively connected to a refrigerant suction side of the plurality of compressors via a capillary tube, and a branch on a refrigerant discharge side of the oil separator, wherein the accumulator is branched via a solenoid on-off valve and a capillary tube. An outdoor unit of a multi-room air conditioner comprising a refrigerant circuit comprising a low pressure-high pressure bypass connected to a refrigerant suction side of
A branch portion of the oil separator on the refrigerant discharge side is provided immediately before the electromagnetic on-off valve.
[0006]
Further, the branch portion is configured to include a branch pipe.
[0007]
Further, the branch portion is configured to include a header.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail as examples based on the drawings.
1A and 1B are explanatory diagrams of an outdoor unit of a multi-room air conditioner according to the present invention. FIG. 1A is a diagram illustrating a refrigerant circuit, and FIG. 1B is an enlarged view of a main part illustrating an example of a refrigerant circuit. C) is an enlarged view of a main part showing another example of the refrigerant circuit.
[0009]
As shown in FIG. 1A, the outdoor unit of the multi-room air conditioner according to the present invention includes a first compressor 1a, a second compressor 1b, and a third compressor 1c which are arranged in parallel. A four-way valve 2, a four-way valve 3, a plurality of outdoor heat exchangers 4a and 4b, a receiver tank 5, and the first compressor 1a provided on the refrigerant discharge side of the first compressor 1a to the third compressor 1c. A refrigerant circuit is constituted by the accumulator 6 provided on the refrigerant suction side of the third compressor 1c.
[0010]
An oil separator 7 is provided between the first compressor 1 a to the third compressor 1 c and the four-way valve 2, and a refrigerant discharge side of the oil separator 7 is branched at a branch portion 8, which will be described later. A first compressor oil return bypass 11 is connected to the refrigerant suction side of the first compressor 1a via an on-off valve 9 and a capillary tube 10.
[0011]
Further, the refrigerant discharge side of the oil separator 7 is branched at a branch portion 8 described later, and the second compressor oil return bypass 12 is connected to the refrigerant suction side of the second compressor 1 b via an electromagnetic on-off valve 9 and a capillary tube 10. Is connected.
[0012]
Further, the refrigerant discharge side of the oil separator 7 is branched by a branch portion 8 described later, and the third compressor oil return bypass 13 is connected to the refrigerant suction side of the third compressor 1 c via an electromagnetic on-off valve 9 and a capillary tube 10. Is connected.
[0013]
Similarly, a refrigerant discharge side of the oil separator 7 is branched at a branch portion 8 described later, and a low-pressure / high-pressure bypass 14 is connected to a refrigerant suction side of the accumulator 6 via an electromagnetic on-off valve 9 and a capillary tube 10. I have.
[0014]
Then, on the refrigerant discharge side of the oil separator 7, the first compressor oil return bypass 11, the second compressor oil return bypass 12, the third compressor oil return bypass 13, and the low pressure-high pressure bypass 14, respectively. The branch portion 8 for branching is provided immediately before the electromagnetic on-off valve 9.
[0015]
As a result, the piping from the branch portion 8 to the solenoid on-off valve 9 can be effectively shortened, so that a large space is required to prevent interference with other piping as in the above-described related art. The refrigerant circuit can be simplified, and the structure can be simplified in cost.
[0016]
The branch portion 8 has a configuration including a branch pipe 15 provided immediately before the electromagnetic on-off valve 9 as shown in FIG. 1B as an example, or FIG. As shown in C), the configuration is made up of a header 16 provided immediately before the electromagnetic on-off valve 9, whereby the piping from the oil separator 7 to the branch pipe 15 or the header 16 becomes longer, The space occupied by each of the bypasses 11 to 14 becomes small, and the refrigerant circuit as an outdoor unit of the multi-room air conditioner can be simplified.
[0017]
The branch pipe 15 shown in FIG. 1B as an example and the header 16 shown in FIG. 1C as another example can be selectively adopted from the viewpoint of design. Good.
[0018]
【The invention's effect】
As described above, according to the present invention, there is provided an outdoor unit of a multi-room air conditioner in which a refrigerant path is simplified to save a space for piping.
[Brief description of the drawings]
FIG. 1 is an explanatory view of an outdoor unit of a multi-room air conditioner according to the present invention, in which (A) is a diagram showing a refrigerant circuit, (B) is an enlarged view of a main part showing an example of a refrigerant circuit, (C) is a principal part enlarged view which shows another example of a refrigerant circuit.
FIG. 2 is an explanatory view of an outdoor unit of a conventional multi-room air conditioner, in which (A) is a diagram showing a refrigerant circuit, and (B) is an enlarged view of a main part of the refrigerant circuit.
[Explanation of symbols]
1a First compressor 1b Second compressor 1c Third compressor 2 Four-way valve 3 Four-way valve 4a, 4b Outdoor heat exchanger 5 Receiver tank 6 Accumulator 7 Oil separator 8 Branch 9 Electromagnetic on-off valve 10 Capillary tube 11 First compression Machine oil return bypass 12 Second compressor oil return bypass 13 Third compressor oil return bypass 14 Low pressure-high pressure bypass 15 Branch pipe 16 Header

Claims (3)

並列に配置された複数の圧縮機と、同複数の圧縮機の冷媒吐出側に設けられた四方弁と、室外熱交換器と、レシーバタンクと、前記複数の圧縮機の冷媒吸入側に設けられたアキュームレータと、前記複数の圧縮機と前記四方弁との間に設けられたオイルセパレータと、同オイルセパレータの冷媒吐出側で分岐され、電磁開閉弁およびキャピラリチューブを介して前記複数の圧縮機の冷媒吸入側に夫々接続された複数の圧縮機オイル戻しバイパスと、前記オイルセパレータの冷媒吐出側で分岐され、電磁開閉弁およびキャピラリチューブを介して前記アキュームレータの冷媒吸入側に接続された低圧ー高圧バイパスとからなる冷媒回路を構成してなる多室型空気調和機の室外機において、
前記オイルセパレータの冷媒吐出側の分岐部が、前記電磁開閉弁の直前に設けられてなることを特徴とする多室型空気調和機の室外機。
A plurality of compressors arranged in parallel, a four-way valve provided on the refrigerant discharge side of the plurality of compressors, an outdoor heat exchanger, a receiver tank, and provided on the refrigerant suction side of the plurality of compressors The accumulator, and an oil separator provided between the plurality of compressors and the four-way valve, a branch on the refrigerant discharge side of the oil separator, the electromagnetic separator of the plurality of compressors via a solenoid valve and a capillary tube A plurality of compressor oil return bypasses respectively connected to the refrigerant suction side, and a low pressure-high pressure branch branched on the refrigerant discharge side of the oil separator and connected to the refrigerant suction side of the accumulator via an electromagnetic on-off valve and a capillary tube. In an outdoor unit of a multi-room air conditioner comprising a refrigerant circuit composed of a bypass,
An outdoor unit of a multi-room air conditioner, wherein a branch portion of the oil separator on the refrigerant discharge side is provided immediately before the electromagnetic on-off valve.
前記分岐部が、分岐管からなることを特徴とする請求項1に記載の多室型空気調和機の室外機。The outdoor unit of a multi-room air conditioner according to claim 1, wherein the branch part comprises a branch pipe. 前記分岐部が、ヘッダーからなることを特徴とする請求項1に記載の多室型空気調和機の室外機。The outdoor unit of a multi-room air conditioner according to claim 1, wherein the branch part is formed of a header.
JP2002203853A 2002-07-12 2002-07-12 Outdoor unit of multi-chamber type air conditioner Pending JP2004044930A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012154509A (en) * 2011-01-24 2012-08-16 Mitsubishi Electric Corp Air conditioner
JP2013122361A (en) * 2011-12-12 2013-06-20 Daikin Industries Ltd Air conditioning device
CN104676974A (en) * 2015-03-13 2015-06-03 山东艾斯伦制冷设备有限公司 Automatic oil-return device for multi-unit parallel compression refrigeration unit pipeline system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012154509A (en) * 2011-01-24 2012-08-16 Mitsubishi Electric Corp Air conditioner
JP2013122361A (en) * 2011-12-12 2013-06-20 Daikin Industries Ltd Air conditioning device
CN104676974A (en) * 2015-03-13 2015-06-03 山东艾斯伦制冷设备有限公司 Automatic oil-return device for multi-unit parallel compression refrigeration unit pipeline system
CN104676974B (en) * 2015-03-13 2017-01-18 山东艾斯伦制冷设备有限公司 Automatic oil-return device for multi-unit parallel compression refrigeration unit pipeline system

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