JP2000146369A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP2000146369A JP2000146369A JP10316408A JP31640898A JP2000146369A JP 2000146369 A JP2000146369 A JP 2000146369A JP 10316408 A JP10316408 A JP 10316408A JP 31640898 A JP31640898 A JP 31640898A JP 2000146369 A JP2000146369 A JP 2000146369A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- heat exchanger
- container
- refrigerant
- oil separator
- 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.)
- Pending
Links
- 239000003921 oil Substances 0.000 claims abstract description 87
- 239000003507 refrigerant Substances 0.000 claims abstract description 72
- 238000005192 partition Methods 0.000 claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 239000010721 machine oil Substances 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 239000002480 mineral oil Substances 0.000 abstract description 20
- 235000010446 mineral oil Nutrition 0.000 abstract description 20
- 238000005057 refrigeration Methods 0.000 abstract description 10
- 230000007547 defect Effects 0.000 abstract description 3
- 238000011176 pooling Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 239000010726 refrigerant oil Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- -1 polyol ester Chemical class 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General 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
- F25B2400/18—Refrigerant conversion
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
(57)【要約】
【課題】 ＨＣＦＣ系冷媒の既設配管を再利用しても、
既設配管内の残留鉱油分を除去し、冷凍サイクル内に侵
入することにより起こる性能不良や熱交換器内面への油
溜りによる性能低下を防止し得る空気調和機を提供す
る。
【解決手段】 減圧弁４と室内機８との間の配管接続部
９，１０に油分離器６を設け、この油分離器６は、容器
１２底面より第１の配管１３及び第２の配管１４を容器
１２内に挿入し、この第１の配管１３の一端を前記室外
熱交換器３側に接続し他端を容器１２内に開口するとと
もに、第２の配管１４の一端を室内熱交換器８側に接続
し他端を容器６内に開口し、第１の配管１３の開口端と
第２の配管１４の開口端より高くして両開口端との間に
段差を設け、これら両開口端との間に隔壁１５を設け、
容器天井内壁面及び底面側との間に隙間を設け、冷媒・
冷凍機油の混合物が相互に流れるように構成し、油分離
器を着脱自在にする。
(57) [Summary] [Problem] Even if the existing piping of HCFC refrigerant is reused,
Provided is an air conditioner capable of removing a residual mineral oil content in an existing pipe and preventing a performance defect caused by entering a refrigeration cycle and a performance drop caused by oil pooling on a heat exchanger inner surface. SOLUTION: An oil separator 6 is provided at a pipe connection portion 9, 10 between a pressure reducing valve 4 and an indoor unit 8, and the oil separator 6 is provided with a first pipe 13 and a second pipe from the bottom of a container 12. 14 is inserted into the container 12, one end of the first pipe 13 is connected to the outdoor heat exchanger 3 side, the other end is opened in the container 12, and one end of the second pipe 14 is connected to the indoor heat exchanger. Connected to the vessel 8 side, the other end is opened in the container 6, and a step is provided between the open ends of the first pipe 13 and the second pipe 14 so as to be higher than the open ends thereof. A partition wall 15 is provided between the opening end;
A gap is provided between the inner wall surface and the bottom side of the container ceiling,
The mixture of refrigerating machine oils is configured to flow mutually, making the oil separator detachable.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は空気調和機に係り、
特に、たとえばＨＣＦＣ系の冷媒のＲ２２と鉱油とを用
いる空気調和機から、ＨＦＣ系の冷媒と、それに相溶性
のある冷凍機油とを用いる空気調和機へ切り替える際に
信頼性の向上を図れる空気調和機に関する。The present invention relates to an air conditioner,
In particular, air conditioning that can improve reliability when switching from an air conditioner that uses R22 of HCFC-based refrigerant and mineral oil to an air conditioner that uses HFC-based refrigerant and refrigeration oil compatible therewith, for example. About the machine.
【０００２】[0002]
【従来の技術】従来、家庭用の空気調和機には、冷媒に
ＨＣＦＣ系のＲ２２を用い、また、冷凍機油として鉱油
が用いられていた。しかし、地球環境保護の点から、冷
媒は従来のＨＣＦＣ系冷媒からＨＦＣ系冷媒に移行しつ
つある。ＨＦＣ系冷媒はＨＣＦＣ系の冷媒と分子の分極
状態が異なるため、ＨＦＣ系の冷媒には従来の鉱油は充
分に溶解せず、このため、冷凍サイクルの油戻り性を考
慮した場合、冷凍機油に鉱油を用いることはできない。
そのため、ＨＦＣ系冷媒には必要な溶解度をもたせるた
め、冷凍機油としてポリオールエステルなどの人工合成
油が用いられる。2. Description of the Related Art Conventionally, an air conditioner for home use has used HCFC type R22 as a refrigerant and mineral oil as a refrigerating machine oil. However, from the viewpoint of global environmental protection, refrigerants are shifting from conventional HCFC-based refrigerants to HFC-based refrigerants. Since the HFC-based refrigerant has a different polarization state of the molecule from the HCFC-based refrigerant, the conventional mineral oil does not sufficiently dissolve in the HFC-based refrigerant. Mineral oil cannot be used.
Therefore, an artificial synthetic oil such as a polyol ester is used as a refrigerating machine oil in order to provide a necessary solubility to the HFC-based refrigerant.
【０００３】この相溶性を持った合成油を前提として構
成した冷凍サイクル内に、ＨＣＦＣ系冷媒で相溶性のあ
る鉱油でもＨＦＣ系冷媒には非相溶性であり、このた
め、ＨＦＣ系冷媒に非相溶性の合成油が混入すると、低
温時には高粘度の非相溶性の鉱油が摺動部に貼りつく。
これが原因で、圧縮機や四方弁等に起動不良を起こし、
また、減圧器出口で油の堆積による性能不良、熱交換器
内面への油溜りによる性能低下が生ずる。[0003] In a refrigeration cycle constructed on the premise of a synthetic oil having compatibility, even mineral oil compatible with HCFC-based refrigerant is incompatible with HFC-based refrigerant. When a compatible synthetic oil is mixed, a high-viscosity incompatible mineral oil adheres to the sliding portion at a low temperature.
Due to this, the compressor, the four-way valve, etc. cause a start failure,
In addition, poor performance occurs due to accumulation of oil at the outlet of the pressure reducer, and performance degradation occurs due to accumulation of oil on the inner surface of the heat exchanger.
【０００４】一方、空気調和機、特に家庭用ルームエア
コンの主流は室内機と室外機とを分離してそれぞれ部屋
の内外に設置し、接続配管を用いて室内機と室外機とを
接続するのが一般的である。Ｒ２２を使用していた空気
調和機の接続配管をそのまま利用して、ＨＦＣ系冷媒
（たとえば、Ｒ４１０Ａなど）を用いる空気調和機を据
え付けると、鉱油は完全に除去されず接続配管中に一部
鉱油が残留する。そのため、接続配管に残留する鉱油を
完全に除去するには、接続配管の交換が必要になる。On the other hand, the mainstream of air conditioners, especially home room air conditioners, is that an indoor unit and an outdoor unit are separated and installed inside and outside the room, respectively, and the indoor unit and the outdoor unit are connected using connection piping. Is common. When an air conditioner using an HFC-based refrigerant (for example, R410A) is installed by using the connection pipe of the air conditioner using R22 as it is, the mineral oil is not completely removed, and some of the mineral oil is contained in the connection pipe. Remain. Therefore, in order to completely remove the mineral oil remaining in the connection pipe, the connection pipe needs to be replaced.
【０００５】また、油を分離する方法としては、例えば
特開平６−３４７１４１号公報に記載される方法もあ
る。[0005] As a method for separating oil, for example, there is a method described in JP-A-6-347141.
【０００６】[0006]
【発明が解決しようとする課題】しかし、近年、美観重
視のために接続配管を壁の中に埋設する埋設配管が増え
ており、この場合接続配管を交換し、新規に接続配管を
埋設し直すのは困難である。However, in recent years, the number of buried pipes buried in a wall for emphasis on aesthetics has increased, and in this case, the connection pipes are replaced and new buried connection pipes are rebuilt. It is difficult.
【０００７】このような場合、配管を洗浄する方法があ
るが、一般に家庭用ルームエアコンで接続配管を洗浄す
ることは据え付け時の作業の大幅な増加となり、また、
環境保護の立場から洗浄液の大気放出やその廃液処理な
ども問題であり、単純には適用できない。In such a case, there is a method of cleaning the pipes. However, generally, cleaning the connection pipes with a home room air conditioner greatly increases the work at the time of installation.
From the standpoint of environmental protection, discharge of the cleaning liquid into the atmosphere and treatment of the waste liquid are also problems and cannot be simply applied.
【０００８】また、上記特開平７−８３５４５号公報に
記載される、いわゆるとも洗いの方法では、冷媒や冷凍
機油の交換が必要であり、このための作業が増大し、ま
た洗浄に使用した冷媒や冷凍機油の処理に対する配慮も
必要となる。Further, in the so-called washing method described in Japanese Patent Application Laid-Open No. 7-83545, it is necessary to change the refrigerant and the refrigerating machine oil, the work for this is increased, and the refrigerant used for the cleaning is used. Also, consideration must be given to the processing of refrigeration oil.
【０００９】さらにまた、油を分離する方法としては、
たとえば特開平６−３４７１４１号公報に記載される方
法もあるが、これは、冷媒と油とを分離するのが目的で
あり、鉱油とＨＦＣ系冷媒で使用される合成油とを分離
することに対しては配慮されていない。Further, as a method of separating oil,
For example, there is a method described in Japanese Patent Application Laid-Open No. Hei 6-347141, which aims to separate refrigerant and oil, and is intended to separate mineral oil from synthetic oil used in HFC-based refrigerants. It is not considered.
【００１０】本発明の目的は、ＨＣＦＣ系冷媒の既設配
管を再利用しても、既設配管内の残留鉱油分を除去し、
冷凍サイクル内に侵入することにより起こる性能不良や
熱交換器内面への油溜りによる性能低下を防止し得る空
気調和機を提供することにある。[0010] An object of the present invention is to remove the residual mineral oil in the existing piping even if the existing piping of the HCFC-based refrigerant is reused.
It is an object of the present invention to provide an air conditioner capable of preventing a performance defect caused by intruding into a refrigeration cycle and a performance decrease due to oil pool on an inner surface of a heat exchanger.
【００１１】[0011]
【課題を解決するための手段】上記目的は、圧縮機と室
外熱交換器とこの室外熱交換器に接続される減圧器とで
構成され室外で熱交換をする室外機と、室内熱交換器に
より室内で熱交換をする室内機と、これら室外機と室内
機とを接続する接続配管部とを備え、冷媒にＨＦＣ系冷
媒を用いる空気調和機において、前記減圧器と室内機と
の間の接続配管部に油分離器を設け、この油分離器は、
油分離器の容器底面より第１の配管及び第２の配管を容
器内に挿入し、この第１の配管の一端を前記室外熱交換
器側に接続し他端を前記容器内に開口するとともに、第
２の配管の一端を前記室内熱交換器側に接続し他端を前
記容器内に開口し、前記第１の配管の開口端を第２の配
管の開口端より高くして両開口端との間に段差を設け、
これら両開口端との間に隔壁を設け、この隔壁と容器天
井内壁面及び底面側との間に隙間を設け、この隙間を通
して冷媒・冷凍機油の混合物が相互に流れるように構成
し、前記油分離器を接続配管部から着脱自在にする、こ
とにより達成される。SUMMARY OF THE INVENTION An object of the present invention is to provide an outdoor unit which comprises a compressor, an outdoor heat exchanger, and a decompressor connected to the outdoor heat exchanger and performs heat exchange outdoors, and an indoor heat exchanger. An indoor unit that performs heat exchange indoors, and a connection pipe section that connects the outdoor unit and the indoor unit, and an air conditioner that uses an HFC-based refrigerant as a refrigerant. An oil separator is provided in the connection piping, and this oil separator
A first pipe and a second pipe are inserted into the vessel from the bottom of the vessel of the oil separator, one end of the first pipe is connected to the outdoor heat exchanger side, and the other end is opened in the vessel. Connecting one end of the second pipe to the indoor heat exchanger side and opening the other end in the container, and setting the open end of the first pipe higher than the open end of the second pipe to open both ends. And a step between
A partition is provided between the two open ends, a gap is provided between the partition and the inner wall surface and the bottom side of the container ceiling, and a mixture of the refrigerant and the refrigerating machine oil is configured to flow through each other through the gap. This is achieved by making the separator detachable from the connection piping section.
【００１２】また、上記目的は、圧縮機と室外熱交換器
とこの室外熱交換器に接続される減圧器とで構成され室
外で熱交換をする室外機と、室内熱交換器により室内で
熱交換をする室内機と、これら室外機と室内機とを接続
する接続配管部とを備え、冷媒にＨＦＣ系冷媒を用いる
空気調和機において、前記減圧器と接続配管部との間の
室外機内部に油分離器を設け、この油分離器は、油分離
器の容器底面より第１の配管及び第２の配管を容器内に
挿入し、この第１の配管の一端を前記室外熱交換器側に
接続し他端を前記容器内に開口するとともに、第２の配
管の一端を前記室内熱交換器側に接続し他端を前記容器
内に開口し、前記第１の配管の開口端を第２の配管の開
口端より高くして両開口端との間に段差を設け、これら
両開口端との間に隔壁を設け、この隔壁と容器天井内壁
面及び底面側との間に隙間を設け、この隙間を通して冷
媒・冷凍機油の混合物が相互に流れるように構成する、
ことにより達成される。Another object of the present invention is to provide an outdoor unit which includes a compressor, an outdoor heat exchanger, and a decompressor connected to the outdoor heat exchanger and performs heat exchange outdoors, and an indoor heat exchanger for heat exchange indoors. An air conditioner including an indoor unit to be replaced and a connection pipe section for connecting the outdoor unit and the indoor unit, and using an HFC-based refrigerant as a refrigerant, wherein the inside of the outdoor unit between the decompressor and the connection pipe section An oil separator is provided in the oil separator. In the oil separator, a first pipe and a second pipe are inserted into the container from the bottom of the container of the oil separator, and one end of the first pipe is connected to the outdoor heat exchanger. And the other end is opened in the vessel, one end of a second pipe is connected to the indoor heat exchanger side, the other end is opened in the vessel, and the open end of the first pipe is Step 2 is made higher than the open end of the pipe 2 and a step is provided between the two open ends. The wall is provided, the gap between the partition wall and the container ceiling inner wall and the bottom side is provided, a mixture of refrigerant-refrigerant oil is configured to flow into each other through the gap,
This is achieved by:
【００１３】さらにまた、上記目的は、圧縮機と室外熱
交換器とこの室外熱交換器に接続される減圧器とで構成
され室外で熱交換をする室外機と、室内熱交換器により
室内で熱交換をする室内機と、これら室外機と室内機と
を接続する配管接続部とを備え、冷媒にＨＦＣ系冷媒を
用いる空気調和機において、前記減圧器と室内機との間
に並列に分岐回路を設け、この分岐回路に油分離器を設
け、この油分離器は、油分離器の容器底面より第１の配
管及び第２の配管を容器内に挿入し、この第１の配管の
一端を前記室外熱交換器側に接続し他端を前記容器内に
開口するとともに、第２の配管の一端を前記室内熱交換
器側に接続し他端を前記容器内に開口し、前記第１の配
管の開口端を第２の配管の開口端より高くして両開口端
との間に段差を設け、これら両開口端との間に隔壁を設
け、この隔壁と容器天井内壁面及び底面側との間に隙間
を設け、この隙間を通して冷媒・冷凍機油の混合物が相
互に流れるように構成する、ことにより達成される。Still another object of the present invention is to provide an outdoor unit configured to include a compressor, an outdoor heat exchanger, and a decompressor connected to the outdoor heat exchanger for performing heat exchange outdoors, and an indoor heat exchanger for indoor use. An air conditioner that includes an indoor unit that performs heat exchange and a pipe connection unit that connects the outdoor unit and the indoor unit, and branches in parallel between the decompressor and the indoor unit in an air conditioner that uses an HFC-based refrigerant as a refrigerant. A circuit is provided, and an oil separator is provided in the branch circuit. In the oil separator, a first pipe and a second pipe are inserted into the vessel from the bottom of the vessel of the oil separator, and one end of the first pipe is provided. Is connected to the outdoor heat exchanger side and the other end is opened in the container, one end of a second pipe is connected to the indoor heat exchanger side and the other end is opened in the container, The open end of the second pipe is higher than the open end of the second pipe, and a step is provided between both open ends. A partition is provided between the two open ends, a gap is provided between the partition and the inner wall surface and the bottom side of the container, and the mixture of the refrigerant and the refrigerating machine oil flows mutually through the gap. Is achieved by
【００１４】さらにまた、上記目的は、圧縮機と室外熱
交換器とこの室外熱交換器に接続される減圧器とで構成
され室外で熱交換をする室外機と、室内熱交換器により
室内で熱交換をする室内機と、これら室外機と室内機と
を接続する配管接続部とを備え、冷媒にＨＦＣ系冷媒を
用いる空気調和機において、前記減圧器と配管接続部と
の間の室外機に油分離器を設け、この油分離器は、油分
離器の容器底面より第１の配管及び第２の配管を容器内
に挿入し、この第１の配管の一端を前記室外熱交換器側
に接続し他端を前記容器内に開口するとともに、第２の
配管の一端を前記室内熱交換器側に接続し他端を前記容
器内に開口し、前記第１の配管の開口端を第２の配管の
開口端より高くして両開口端との間に段差を設け、これ
ら両開口端との間に隔壁を設け、この隔壁と容器天井内
壁面及び底面側との間に隙間を設け、この隙間を通して
冷媒・冷凍機油の混合物が相互に流れるように構成し、
この油分離器のガス層部と暖房時に室内熱交換器に冷媒
の流入する配管とを接続する、ことにより達成される。Still another object of the present invention is to provide an outdoor unit which includes a compressor, an outdoor heat exchanger, and a decompressor connected to the outdoor heat exchanger and performs heat exchange outdoors, and an indoor heat exchanger for indoor use. An air conditioner including an indoor unit that performs heat exchange and a pipe connection unit that connects the outdoor unit and the indoor unit, wherein the outdoor unit between the decompressor and the pipe connection unit is an air conditioner that uses an HFC-based refrigerant as a refrigerant. An oil separator is provided in the oil separator. In the oil separator, a first pipe and a second pipe are inserted into the container from the bottom of the container of the oil separator, and one end of the first pipe is connected to the outdoor heat exchanger. And the other end is opened in the vessel, one end of a second pipe is connected to the indoor heat exchanger side, the other end is opened in the vessel, and the open end of the first pipe is Steps are made higher than the open ends of the two pipes, and a step is provided between the two open ends. The partition wall is provided, the gap between the partition wall and the container ceiling inner wall and the bottom side is provided, a mixture of refrigerant-refrigerating machine oil constituted to flow to each other through the gap,
This is achieved by connecting the gas layer portion of the oil separator to a pipe through which the refrigerant flows into the indoor heat exchanger during heating.
【００１５】[0015]
【発明の実施の形態】以下、本発明の実施例を図を参照
して説明する。図１は、空気調和機の第１の実施例のサ
イクル構成図である。図中、１は圧縮機で、この圧縮機
１の吐出側には四方弁２が接続されている。この四方弁
２は実線もしくは破線の位置に弁を切り替えることによ
り流路を切り替えることができるものである。３は室外
熱交換器、４は減圧器（たとえば、減圧弁）である。５
は止め弁つきの着脱が自在になっている接続部（以下、
フレア接続部という）、６は油分離器である。７は止め
弁なしの着脱が自在になっている接続部（以下、フレア
接続部という）、８は室内熱交換器である。９は小径の
接続配管で、前記室外熱交換器３と室内熱交換器８とを
接続している。１０は大径の接続配管で、前記接続配管
９より太く、室内熱交換器８と四方弁２とを接続してい
る。１１はアキュムレータである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cycle configuration diagram of the first embodiment of the air conditioner. In the figure, reference numeral 1 denotes a compressor, and a four-way valve 2 is connected to a discharge side of the compressor 1. The four-way valve 2 can switch the flow path by switching the valve to a position indicated by a solid line or a broken line. Reference numeral 3 denotes an outdoor heat exchanger, and reference numeral 4 denotes a pressure reducer (for example, a pressure reducing valve). 5
Is a connection part with a stop valve that can be freely attached and detached (hereinafter referred to as
Reference numeral 6 denotes an oil separator. Reference numeral 7 denotes a detachable connection portion without a stop valve (hereinafter, referred to as a flare connection portion), and reference numeral 8 denotes an indoor heat exchanger. 9 is a small-diameter connection pipe connecting the outdoor heat exchanger 3 and the indoor heat exchanger 8. Reference numeral 10 denotes a large-diameter connection pipe, which is thicker than the connection pipe 9 and connects the indoor heat exchanger 8 and the four-way valve 2. 11 is an accumulator.
【００１６】室外機は前記圧縮機１と四方弁２と室外熱
交換器３と減圧器４とで構成されて室外で熱交換をし、
また室内機は室内熱交換器８により室内で熱交換をし、
これら室外機と室内機とは接続配管９、１０を介してフ
レア接続部５、７で接続されている。また、室外機と室
内機との間の接続配管９部において、油分離器６は止め
弁付きフレア接続部５を介して着脱自在に接続されてい
る。The outdoor unit is composed of the compressor 1, the four-way valve 2, the outdoor heat exchanger 3, and the decompressor 4, and performs heat exchange outdoors.
The indoor unit exchanges heat indoors by the indoor heat exchanger 8,
These outdoor units and indoor units are connected by flare connection parts 5 and 7 via connection pipes 9 and 10. The oil separator 6 is detachably connected to the connection pipe 9 between the outdoor unit and the indoor unit via a flare connection unit 5 with a stop valve.
【００１７】図２は、油分離器６の内部構造を示す縦断
面図である。油分離器６は、容器１２と、この容器１２
の下部よりフレア接続部５を介し室外機に一端が接続さ
れる配管１３（第１の配管）と、フレア接続部５、接続
配管９、フレア接続部７を介して室内機に一端が接続さ
れる配管１４（第２の配管）の配管と、これら配管１３
と１４を仕切る隔壁１５とで構成されている。FIG. 2 is a longitudinal sectional view showing the internal structure of the oil separator 6. The oil separator 6 includes a container 12 and the container 12.
One end is connected to the indoor unit via the flare connection part 5, the connection pipe 9, and the flare connection part 7, and a pipe 13 (first pipe) having one end connected to the outdoor unit via the flare connection part 5 from the lower part of the unit. Pipes 14 (second pipes) and these pipes 13
And a partition 15 for partitioning the partition 14.
【００１８】配管１３と１４の開口端には段差Ｌ２が設
けられ、配管１３側をＬ２分だけ高くしている。容器１
２の天井壁面と隔壁１５の上端との間にはＳ２の隙間が
形成され、図示左右の二つの部屋間にガス冷媒が流れる
ようになっている。また、容器１２の底面と隔壁１５の
下端との間には隙間Ｓ１が形成され、図示左右の二つの
部屋間を冷媒・油の混合流体が流れるようになってい
る。配管１４の先端と隙間Ｓ１上端とは段差Ｌ１を設け
てあり、また、配管１３上端と容器１２の天井壁面との
間には間隔Ｈを設けてある。At the open ends of the pipes 13 and 14, a step L2 is provided, and the pipe 13 side is raised by L2. Container 1
A gap S2 is formed between the ceiling wall surface of No. 2 and the upper end of the partition wall 15, so that the gas refrigerant flows between the two rooms on the left and right in the figure. A gap S1 is formed between the bottom surface of the container 12 and the lower end of the partition wall 15, so that a mixed fluid of refrigerant and oil flows between the two rooms on the left and right in the figure. A step L1 is provided between the tip of the pipe 14 and the upper end of the gap S1, and an interval H is provided between the upper end of the pipe 13 and the ceiling wall surface of the container 12.
【００１９】次に、上記構成の空気調和機の動作につい
て説明する。まず、冷房運転時の動作について説明す
る。冷房運転を開始すると、圧縮機１により圧縮された
ガス冷媒は四方弁２（切替弁の位置は実線で示す位置に
ある）を経て室外熱交換器３で放熱する。過冷却状態に
なった冷媒と油との混合物は、さらに減圧器４を通過す
ることによって断熱膨張して２相液状態となる。配管１
３より容器１２内に入り、高さＨの空間で２相液状態の
冷媒と油との混合物は液とガス分とに分離され、ガス分
は隙間Ｓ２を通って配管１４側の部屋に入る。Next, the operation of the air conditioner having the above configuration will be described. First, the operation during the cooling operation will be described. When the cooling operation is started, the gas refrigerant compressed by the compressor 1 radiates heat in the outdoor heat exchanger 3 through the four-way valve 2 (the position of the switching valve is at the position shown by the solid line). The mixture of the supercooled refrigerant and the oil further passes through the pressure reducer 4 and adiabatically expands to a two-phase liquid state. Piping 1
3, the mixture of the refrigerant and the oil in a two-phase liquid state is separated into a liquid and a gas in the space of height H, and the gas enters the room on the pipe 14 side through the gap S2. .
【００２０】一方、液分は容器１２の内壁面を伝って下
部に降下し、容器下部に溜まるとともに、一部液は隔壁
１５の下部の隙間Ｓ１を通って配管１４側に流れ、配管
１４の上端より吸い込まれて油分離器６の外部に出る。
この結果、配管１４の上端部までは液が溜まるが、これ
以上に溜まることはない。On the other hand, the liquid component descends along the inner wall surface of the container 12 and accumulates in the lower portion of the container, and a part of the liquid flows to the pipe 14 through the gap S1 below the partition wall 15, and It is sucked from the upper end and goes out of the oil separator 6.
As a result, the liquid accumulates up to the upper end of the pipe 14, but does not accumulate any more.
【００２１】他方、配管１３側も同様に配管１３上端の
高さまで液面が上昇する。ただし、配管１４上端から液
が吸い込まれて流れ出すのに対して、配管１３の上端
は、配管１４よりもＬ１分だけ高いため、単純な液溜り
となる。この時、鉱油は冷媒に解けず、かつ液冷媒に比
べて密度が小さいため、液溜りの上層部に集まる。On the other hand, the liquid level of the pipe 13 also rises to the level of the upper end of the pipe 13. However, while the liquid is sucked out from the upper end of the pipe 14 and flows out, the upper end of the pipe 13 is higher than the pipe 14 by L1 and thus becomes a simple liquid pool. At this time, the mineral oil does not melt into the refrigerant and has a lower density than the liquid refrigerant, so that it collects in the upper layer of the liquid pool.
【００２２】一方、ＨＦＣ系用の合成油は冷媒と相溶性
があるため、冷媒といっしょに冷凍サイクルで循環し油
分離器６外に出て行く。この結果、冷媒流れによる乱れ
を考慮しない場合、最大Ｌ２の高さに相当する容積分の
鉱油を溜めることができる。この時、容器１２の断面積
や圧縮機１の回転数等を調整することにより、容器１２
内の冷媒流速を適正化し、鉱油を溜める効果を高めるこ
とができる。On the other hand, since the synthetic oil for the HFC system is compatible with the refrigerant, it circulates together with the refrigerant in the refrigeration cycle and goes out of the oil separator 6. As a result, when the turbulence due to the flow of the refrigerant is not considered, a mineral oil of a volume corresponding to the height of the maximum L2 can be stored. At this time, by adjusting the cross-sectional area of the container 12 and the rotation speed of the compressor 1, etc.
It is possible to optimize the flow rate of the refrigerant in the inside and enhance the effect of storing the mineral oil.
【００２３】所定時間運転した後、油分離器６と小径側
の接続配管９との間の止め弁つきフレア接続部５の止め
弁、次に、油分離器６と室外機との間の止め弁付きフレ
ア接続部５の止め弁を順に閉鎖して室内機すなわち室内
熱交換器８内の冷媒を回収する。その後、大径側の接続
配管１０と室外機との間の止め弁付きフレア接続部５の
止め弁を閉鎖し、油分離器６を取り外す。さらに、小径
側の接続配管９を室外機の止め弁付きフレア接続部５に
直接接続し直し、必要な場合は、油分離器６内に溜まっ
た液冷媒に相当する冷媒量を追加する。After operating for a predetermined time, a stop valve of the flare connection portion 5 with a stop valve between the oil separator 6 and the connection pipe 9 on the small diameter side, and then a stop between the oil separator 6 and the outdoor unit. The stop valves of the valved flare connection part 5 are sequentially closed to collect the refrigerant in the indoor unit, that is, the indoor heat exchanger 8. Then, the stop valve of the flare connection part 5 with a stop valve between the large-diameter connection pipe 10 and the outdoor unit is closed, and the oil separator 6 is removed. Further, the connection pipe 9 on the small diameter side is directly connected again to the flare connection part 5 with the stop valve of the outdoor unit, and if necessary, the amount of refrigerant corresponding to the liquid refrigerant accumulated in the oil separator 6 is added.
【００２４】上記操作により、既設配管内にあったＨＣ
ＦＣ系冷媒で使用され、除去されずに残っていた鉱油を
油分離器６内に溜めたままで取り出すことができる。By the above operation, the HC existing in the existing pipe
Mineral oil that has been used as an FC-based refrigerant and has not been removed can be taken out while remaining in the oil separator 6.
【００２５】次に、暖房運転時の動作について説明す
る。暖房運転時は、室内機１で圧縮されたガス冷媒は四
方弁２（切替弁の位置は破線で示す位置にある）を経て
室内熱交換器８で放熱する。過冷却状態となった冷媒と
油との混合物は、配管１４側より容器１２内に入り、隔
壁１５の下側の隙間Ｓ１を通って配管１３側の部屋に流
れ込み、配管１３の上端から油分離器６外に流れ出る。
したがって、容器１２内には配管１３の上端部まで液面
が生じるが、これ以上に溜ることはない。この時、配管
１４側の部屋には、配管１３上端からの段差Ｌ２分の液
溜りが存在する。段差Ｌ２の高さを十分に高くし、冷媒
流による攪拌効果を小さくすることにより、密度の違い
により、配管１４側の部屋の液面に鉱油分が溜まる。Next, the operation during the heating operation will be described. During the heating operation, the gas refrigerant compressed in the indoor unit 1 radiates heat in the indoor heat exchanger 8 via the four-way valve 2 (the position of the switching valve is at the position shown by the broken line). The mixture of the supercooled refrigerant and oil enters the container 12 from the pipe 14 side, flows into the room on the pipe 13 side through the gap S1 below the partition 15, and separates oil from the upper end of the pipe 13. It flows out of the vessel 6.
Therefore, a liquid surface is formed in the container 12 up to the upper end of the pipe 13, but does not accumulate any more. At this time, a liquid pool corresponding to a step L2 from the upper end of the pipe 13 exists in the room on the side of the pipe 14. By making the height of the step L2 sufficiently high and reducing the stirring effect by the refrigerant flow, the mineral oil is accumulated on the liquid surface of the room on the side of the pipe 14 due to the difference in density.
【００２６】所定時間運転後、冷房運転時とは逆に室外
機側の止め弁つきフレア接続部５、油分離器６の接続配
管側の止め弁つきフレア接続部５の順に閉鎖し、冷房運
転に切り替えて室内機内の冷媒を回収した後、小径側の
接続配管９と油分離器６とを取り外し、小径側の接続配
管９と室外機を直接接続し直す。冷房運転時と同様に油
分離器６に残った冷媒と粗当量の冷媒を追加する。After the operation for a predetermined time, the flare connection part 5 with a stop valve on the outdoor unit side and the flare connection part 5 with a stop valve on the connection pipe side of the oil separator 6 are closed in the reverse order of the cooling operation, and the cooling operation is performed. Then, the refrigerant in the indoor unit is recovered and the connection pipe 9 on the small diameter side and the oil separator 6 are removed, and the connection pipe 9 on the small diameter side and the outdoor unit are directly connected again. As in the cooling operation, the refrigerant remaining in the oil separator 6 and the refrigerant having a roughly equivalent amount are added.
【００２７】上記操作により、既設配管内にあったＨＣ
ＦＣ系冷媒で使用され、除去されずに残っていた鉱油を
油分離器６内に溜めたままで取り出すことができる。ま
た、冷房運転の場合と同様に、容器断面積や圧縮機回転
数等の調整により、より効率よく鉱油分の回収を行なう
ことができる。By the above operation, the HC existing in the existing pipe
Mineral oil that has been used as an FC-based refrigerant and has not been removed can be taken out while remaining in the oil separator 6. Further, similarly to the case of the cooling operation, the adjustment of the cross-sectional area of the container, the number of rotations of the compressor, and the like enables more efficient recovery of the mineral oil.
【００２８】図３は、上記油分離装置６を室外機内に組
み込む第２の実施例のサイクル構成図を示す。上記図１
の実施例と比較すると、油分離器６を取り外す必要がな
いため、取り扱い上は改善される。また、本実施例は、
減圧器４と室外機の止め弁付きフレア接続部５との間に
油分離器６を接続しているが、減圧器４と室外熱交換器
３との間に油分離器６の接続を逆向きにして組み込んで
も同様な効果が期待できる。FIG. 3 shows a cycle diagram of a second embodiment in which the oil separating device 6 is incorporated in an outdoor unit. Figure 1 above
As compared with the embodiment of the present invention, there is no need to remove the oil separator 6, so that the handling is improved. Also, the present embodiment
Although the oil separator 6 is connected between the decompressor 4 and the flare connection portion 5 with the stop valve of the outdoor unit, the connection of the oil separator 6 is reversed between the decompressor 4 and the outdoor heat exchanger 3. A similar effect can be expected even if it is installed in the orientation.
【００２９】図４は、油分離装置６を室外機内に組み込
む第３の実施例のサイクル構成図で、上記図３で示す第
２の実施例において、分岐回路１６を設け、この分岐回
路１６に油分離器６を設置する構成としたものである。
流量制限装置１７（たとえばキャピラリチューブ）を入
れることによって流速を調整し、より分離効果を高め、
冷凍サイクル性能に対する分岐回路１６の影響を小さく
することができる。FIG. 4 is a cycle configuration diagram of a third embodiment in which the oil separating device 6 is incorporated in an outdoor unit. In the second embodiment shown in FIG. 3, a branch circuit 16 is provided. The configuration is such that the oil separator 6 is installed.
The flow rate is adjusted by inserting a flow restricting device 17 (for example, a capillary tube) to further enhance the separation effect,
The influence of the branch circuit 16 on the refrigeration cycle performance can be reduced.
【００３０】図５は、油分離装置６を室外機内に組み込
む第４の実施例のサイクル構成図を示す。本実施例は、
油分離器６と性能向上のための気液分離手段を一体化し
たものである。すなわち、油分離器６のガス層部と暖房
時に室内熱交換器８に冷媒の流入する配管（接続配管１
０側の配管）とを流量制限装置１７と逆止弁１８とを介
して接続するものである。FIG. 5 is a cycle configuration diagram of a fourth embodiment in which the oil separation device 6 is incorporated in an outdoor unit. In this embodiment,
The oil separator 6 is integrated with gas-liquid separation means for improving performance. That is, the pipe (the connection pipe 1) through which the refrigerant flows into the indoor heat exchanger 8 during heating and the gas layer portion of the oil separator 6.
(A 0-side pipe) via a flow restricting device 17 and a check valve 18.
【００３１】上記構成により、油分離器６上部の気相成
分を室内熱交換器８に流れるようにバイパスさせる。こ
の結果、液相成分のみ室内熱交換器８に送ることがで
き、蒸発圧力損失を低減し性能向上を図ることができ
る。With the above configuration, the gaseous phase component in the upper part of the oil separator 6 is bypassed so as to flow to the indoor heat exchanger 8. As a result, only the liquid phase component can be sent to the indoor heat exchanger 8, so that the evaporation pressure loss can be reduced and the performance can be improved.
【００３２】図６は、油分離器の第２の実施例を示す。
配管１４側の上部に乱流防止板１９を設けるもので、こ
の乱流防止板１９には孔２０が形成されている。乱流防
止板１９を設けた側の容器内と暖房時に室内熱交換器８
に流入する冷媒配管とを配管２０で接続する。なお、こ
の乱流防止板１９にかえて多孔材・網などを取り付けて
もよい。FIG. 6 shows a second embodiment of the oil separator.
A turbulence prevention plate 19 is provided at an upper portion on the side of the pipe 14, and a hole 20 is formed in the turbulence prevention plate 19. The interior heat exchanger 8 is used for heating the inside of the container provided with the turbulence prevention plate 19 and for heating.
Is connected to a refrigerant pipe flowing into the pipe by a pipe 20. Note that a porous material, a net, or the like may be attached instead of the turbulence prevention plate 19.
【００３３】暖房運転時に、液冷媒の上に溜まった鉱油
成分が乱流防止板１９の上に溜るようにすることで、冷
媒流による攪拌効果を抑えることでができ、分離性能を
向上することができる。By allowing the mineral oil component accumulated on the liquid refrigerant to accumulate on the turbulence prevention plate 19 during the heating operation, the stirring effect by the refrigerant flow can be suppressed, and the separation performance can be improved. Can be.
【００３４】[0034]
【発明の効果】本発明によれば、空気調和機においてＨ
ＣＦＣ系冷媒を使用していた既設配管を用いて、ＨＦＣ
系冷媒とこのＨＦＣ系冷媒に相溶性のある合成油などの
冷凍機油を用いる空気調和機を据え付ける場合に、既設
配管内に残留しているＣＦＣ系冷媒で使用される冷凍機
油を除去することができ、したがって、冷凍サイクル内
に侵入することにより起こる性能不良や熱交換器内面へ
の油溜りによる性能低下を防止することができる。According to the present invention, in an air conditioner, H
Using existing piping that used CFC-based refrigerant, HFC
When installing an air conditioner using a refrigeration oil such as a synthetic oil compatible with the HFC-based refrigerant, the refrigeration oil used in the CFC-based refrigerant remaining in the existing piping can be removed. Therefore, it is possible to prevent a performance defect caused by entering into the refrigeration cycle and a decrease in performance due to oil accumulation on the inner surface of the heat exchanger.
【図１】本発明に係る空気調和機の第１の実施例のサイ
クル構成図である。FIG. 1 is a cycle configuration diagram of a first embodiment of an air conditioner according to the present invention.
【図２】油分離器に係る第１の実施例の内部構造を示す
縦断面図である。FIG. 2 is a longitudinal sectional view showing an internal structure of the first embodiment of the oil separator.
【図３】本発明に係る空気調和機の第２の実施例のサイ
クル構成図である。FIG. 3 is a cycle configuration diagram of a second embodiment of the air conditioner according to the present invention.
【図４】本発明に係る空気調和機の第３の実施例のサイ
クル構成図である。FIG. 4 is a cycle configuration diagram of a third embodiment of the air conditioner according to the present invention.
【図５】本発明に係る空気調和機の第４の実施例のサイ
クル構成図である。FIG. 5 is a cycle configuration diagram of a fourth embodiment of the air conditioner according to the present invention.
【図６】油分離器に係る第２の実施例の内部構造を示す
縦断面図である。FIG. 6 is a longitudinal sectional view showing an internal structure of an oil separator according to a second embodiment.
１…圧縮機 ２…四方弁 ３…室外熱交換器 ４…減圧弁 ５…止め弁付きフレア接続部 ６…油分離器 ７…止め弁なしフレア接続部 ８…室内熱交換器（室内機） ９…小径側の接続配管 １０…大径側の接続配管 １１…アキュムレータ １２…容器 １３，１４，２０…配管 １５…隔壁 １６…分岐回路 １７…流量制御装置 １８…逆止弁 １９…乱流防止板 DESCRIPTION OF SYMBOLS 1 ... Compressor 2 ... Four-way valve 3 ... Outdoor heat exchanger 4 ... Pressure reducing valve 5 ... Flare connection part with a stop valve 6 ... Oil separator 7 ... Flare connection part without a stop valve 8 ... Indoor heat exchanger (indoor unit) 9 ... connection pipe on the small diameter side 10 ... connection pipe on the large diameter side 11 ... accumulator 12 ... container 13, 14, 20 ... pipe 15 ... partition 16 ... branch circuit 17 ... flow control device 18 ... check valve 19 ... turbulence prevention plate
Claims (7)
器に接続される減圧器とで構成され室外で熱交換をする
室外機と、室内熱交換器により室内で熱交換をする室内
機と、これら室外機と室内機とを接続する接続配管部と
を備え、冷媒にＨＦＣ系冷媒を用いる空気調和機におい
て、 前記減圧器と室内機との間の接続配管部に油分離器を設
け、 この油分離器は、油分離器の容器底面より第１の配管及
び第２の配管を容器内に挿入し、この第１の配管の一端
を前記室外熱交換器側に接続し他端を前記容器内に開口
するとともに、第２の配管の一端を前記室内熱交換器側
に接続し他端を前記容器内に開口し、前記第１の配管の
開口端を第２の配管の開口端より高くして両開口端との
間に段差を設け、これら両開口端との間に隔壁を設け、
この隔壁と容器天井内壁面及び底面側との間に隙間を設
け、この隙間を通して冷媒・冷凍機油の混合物が相互に
流れるように構成し、 前記油分離器を接続配管部から着脱自在にすることを特
徴とする空気調和機。1. An outdoor unit that includes a compressor, an outdoor heat exchanger, and a decompressor connected to the outdoor heat exchanger, and that performs heat exchange outdoors, and an indoor unit that performs heat exchange indoors using an indoor heat exchanger. An air conditioner using an HFC-based refrigerant as a refrigerant, comprising an oil separator in a connection pipe between the decompressor and the indoor unit. In this oil separator, a first pipe and a second pipe are inserted into the container from the bottom of the container of the oil separator, one end of the first pipe is connected to the outdoor heat exchanger side, and the other end is connected to the other end. Is opened in the container, one end of the second pipe is connected to the indoor heat exchanger side, the other end is opened in the container, and the open end of the first pipe is opened in the second pipe. A step is provided between both open ends higher than the end, and a partition is provided between these open ends,
A gap is provided between the partition wall and the inner wall surface and the bottom side of the container ceiling, and the mixture of the refrigerant and the refrigerating machine oil is configured to flow through each other through the gap, and the oil separator is detachable from the connection piping section. An air conditioner characterized by the following.
器に接続される減圧器とで構成され室外との熱交換をす
る室外機と、室内熱交換器により室内との熱交換をする
室内機と、これら室外機と室内機とを接続する接続配管
部とを備え、冷媒にＨＦＣ系冷媒を用いる空気調和機に
おいて、 前記減圧器と接続配管部との間の室外機内部に油分離器
を設け、 この油分離器は、油分離器の容器底面より第１の配管及
び第２の配管を容器内に挿入し、この第１の配管の一端
を前記室外熱交換器側に接続し他端を前記容器内に開口
するとともに、第２の配管の一端を前記室内熱交換器側
に接続し他端を前記容器内に開口し、前記第１の配管の
開口端を第２の配管の開口端より高くして両開口端との
間に段差を設け、これら両開口端との間に隔壁を設け、
この隔壁と容器天井内壁面及び底面側との間に隙間を設
け、この隙間を通して冷媒・冷凍機油の混合物が相互に
流れるように構成することを特徴とする空気調和機。2. An outdoor unit, comprising a compressor, an outdoor heat exchanger, and a decompressor connected to the outdoor heat exchanger, for exchanging heat with the outdoor unit, and exchanging heat with the indoor unit by the indoor heat exchanger. An air conditioner using an HFC-based refrigerant as a refrigerant, wherein an oil is contained inside the outdoor unit between the decompressor and the connection pipe. A separator is provided. In this oil separator, a first pipe and a second pipe are inserted into the vessel from the bottom of the vessel of the oil separator, and one end of the first pipe is connected to the outdoor heat exchanger side. The other end is opened in the container, one end of a second pipe is connected to the indoor heat exchanger, the other end is opened in the container, and the open end of the first pipe is connected to a second pipe. A step is provided between the two open ends by making the pipe higher than the open end, and a partition is provided between the open ends,
An air conditioner, wherein a gap is provided between the partition wall and the inner wall surface and the bottom side of the container ceiling, and a mixture of the refrigerant and the refrigerating machine oil flows through the gap.
器に接続される減圧器とで構成され室外との熱交換をす
る室外機と、室内熱交換器により室内との熱交換をする
室内機と、これら室外機と室内機とを接続する配管接続
部とを備え、 冷媒にＨＦＣ系冷媒を用いる空気調和機において、 前記減圧器と室内機との間に並列に分岐回路を設け、 この分岐回路に油分離器を設け、 この油分離器は、油分離器の容器底面より第１の配管及
び第２の配管を容器内に挿入し、この第１の配管の一端
を前記室外熱交換器側に接続し他端を前記容器内に開口
するとともに、第２の配管の一端を前記室内熱交換器側
に接続し他端を前記容器内に開口し、前記第１の配管の
開口端を第２の配管の開口端より高くして両開口端との
間に段差を設け、これら両開口端との間に隔壁を設け、
この隔壁と容器天井内壁面及び底面側との間に隙間を設
け、この隙間を通して冷媒・冷凍機油の混合物が相互に
流れるように構成することを特徴とする空気調和機。3. An outdoor unit, comprising a compressor, an outdoor heat exchanger, and a decompressor connected to the outdoor heat exchanger, for exchanging heat with the outdoor, and an indoor heat exchanger for exchanging heat with the indoor. An air conditioner using an HFC-based refrigerant as a refrigerant, wherein a branch circuit is provided in parallel between the pressure reducer and the indoor unit. An oil separator is provided in the branch circuit. In the oil separator, a first pipe and a second pipe are inserted into the container from the bottom of the container of the oil separator, and one end of the first pipe is connected to the outside of the outdoor. The other end of the first pipe is connected to the heat exchanger side and the other end is opened in the container, and the other end of the second pipe is connected to the indoor heat exchanger side and the other end is opened in the container. The open end is made higher than the open end of the second pipe, and a step is provided between the open ends and the two open ends. A partition provided between,
An air conditioner, wherein a gap is provided between the partition wall and the inner wall surface and the bottom side of the container ceiling, and a mixture of the refrigerant and the refrigerating machine oil flows through the gap.
装置を設けることを特徴とする請求項３記載の空気調和
機。4. The air conditioner according to claim 3, wherein a flow control device is provided between the pressure reducer and the oil separator.
器に接続される減圧器とで構成され室外との熱交換をす
る室外機と、室内熱交換器により室内との熱交換をする
室内機と、これら室外機と室内機とを接続する配管接続
部とを備え、冷媒にＨＦＣ系冷媒を用いる空気調和機に
おいて、 前記減圧器と配管接続部との間の室外機内部に油分離器
を設け、 この油分離器は、油分離器の容器底面より第１の配管及
び第２の配管を容器内に挿入し、この第１の配管の一端
を前記室外熱交換器側に接続し他端を前記容器内に開口
するとともに、第２の配管の一端を前記室内熱交換器側
に接続し他端を前記容器内に開口し、前記第１の配管の
開口端を第２の配管の開口端より高くして両開口端との
間に段差を設け、これら両開口端との間に隔壁を設け、
この隔壁と容器天井内壁面及び底面側との間に隙間を設
け、この隙間を通して冷媒・冷凍機油の混合物が相互に
流れるように構成し、 この油分離器のガス層部と暖房時に室内熱交換器に冷媒
の流入する配管とを接続することを特徴とする空気調和
機。5. An outdoor unit, comprising a compressor, an outdoor heat exchanger, and a decompressor connected to the outdoor heat exchanger, for exchanging heat with the outdoor, and an indoor heat exchanger for exchanging heat with the room. An air conditioner using an HFC-based refrigerant as a refrigerant, the oil inside the outdoor unit between the decompressor and the pipe connection. A separator is provided. In this oil separator, a first pipe and a second pipe are inserted into the vessel from the bottom of the vessel of the oil separator, and one end of the first pipe is connected to the outdoor heat exchanger side. The other end is opened in the container, one end of a second pipe is connected to the indoor heat exchanger, the other end is opened in the container, and the open end of the first pipe is connected to a second pipe. A step is provided between the two open ends by making the pipe higher than the open end, and a partition is provided between the open ends,
A gap is provided between the partition wall and the inner wall surface and the bottom side of the container ceiling, and a mixture of the refrigerant and the refrigerating machine oil is configured to flow through each other through the gap. An air conditioner characterized by connecting a pipe into which a refrigerant flows into an air conditioner.
熱交換器に冷媒の流入する配管とを流量制御装置及び逆
止弁を介して接続することを特徴とする請求項５記載の
空気調和機。6. The method according to claim 5, wherein a gas layer portion of the oil separator and a pipe through which refrigerant flows into the indoor heat exchanger during heating are connected via a flow control device and a check valve. Air conditioner.
り第１の配管及び第２の配管を容器内に挿入し、この第
１の配管の一端を前記室外熱交換器側に接続し他端を前
記容器内に開口するとともに、第２の配管の一端を前記
室内熱交換器側に接続し他端を前記容器内に開口し、前
記第１の配管の開口端を第２の配管の開口端より高くし
て両開口端との間に段差を設け、これら両開口端との間
に隔壁を設けて第２の配管の開口端の上方に孔を形成し
た乱流防止板を設け、この隔壁と容器天井内壁面及び底
面側との間に隙間を設け、この隙間を通して冷媒・冷凍
機油の混合物が相互に流れるように構成するものである
ことを特徴とする請求項１ないし３もしくは５のいずれ
かに記載の空気調和機。7. The oil separator, wherein a first pipe and a second pipe are inserted into the vessel from the bottom of the vessel of the oil separator, and one end of the first pipe is connected to the outdoor heat exchanger side. The other end is opened in the container, one end of a second pipe is connected to the indoor heat exchanger, the other end is opened in the container, and the open end of the first pipe is connected to a second pipe. A turbulence prevention plate having a step higher than the open end of the pipe and providing a step between the two open ends, providing a partition between the open ends and forming a hole above the open end of the second pipe. A gap is provided between the partition and the inner wall surface and the bottom surface side of the container ceiling, and a mixture of the refrigerant and the refrigerating machine oil flows mutually through the gap. Or the air conditioner according to any one of 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10316408A JP2000146369A (en) | 1998-11-06 | 1998-11-06 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10316408A JP2000146369A (en) | 1998-11-06 | 1998-11-06 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000146369A true JP2000146369A (en) | 2000-05-26 |
Family
ID=18076749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10316408A Pending JP2000146369A (en) | 1998-11-06 | 1998-11-06 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000146369A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002195702A (en) * | 2000-12-25 | 2002-07-10 | Mitsubishi Electric Corp | Extraction and separation mechanism, refrigerating cycle apparatus, heat source unit and regeneration method therefor |
| US6510698B2 (en) | 1999-05-20 | 2003-01-28 | Mitsubishi Denki Kabushiki Kaisha | Refrigeration system, and method of updating and operating the same |
| EP1669704A2 (en) * | 2000-12-15 | 2006-06-14 | Mitsubishi Denki Kabushiki Kaisha | Refrigeration cycle system, and method of operating the same |
| JP2008019857A (en) * | 2006-07-13 | 2008-01-31 | Sumitomo Heavy Ind Ltd | Horizontal bulk oil separator, and reservoir |
| JP2009085577A (en) * | 2007-10-03 | 2009-04-23 | Hitachi Appliances Inc | Refrigeration cycle equipment |
| CN101561208B (en) * | 2009-05-15 | 2010-12-08 | 宁波奥克斯电气有限公司 | Method for controlling oil return of air conditioners |
| CN105371530A (en) * | 2014-08-19 | 2016-03-02 | 广东美的暖通设备有限公司 | Outdoor units, outdoor unit system, multi-connected air conditioning unit and oil uniformizing control method for multi-connected air conditioning unit |
-
1998
- 1998-11-06 JP JP10316408A patent/JP2000146369A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6510698B2 (en) | 1999-05-20 | 2003-01-28 | Mitsubishi Denki Kabushiki Kaisha | Refrigeration system, and method of updating and operating the same |
| EP1669704A2 (en) * | 2000-12-15 | 2006-06-14 | Mitsubishi Denki Kabushiki Kaisha | Refrigeration cycle system, and method of operating the same |
| EP1669704A3 (en) * | 2000-12-15 | 2006-08-02 | Mitsubishi Denki Kabushiki Kaisha | Refrigeration cycle system, and method of operating the same |
| JP2002195702A (en) * | 2000-12-25 | 2002-07-10 | Mitsubishi Electric Corp | Extraction and separation mechanism, refrigerating cycle apparatus, heat source unit and regeneration method therefor |
| JP4567182B2 (en) * | 2000-12-25 | 2010-10-20 | 三菱電機株式会社 | Extraction / separation mechanism, heat source unit of refrigeration cycle apparatus, refrigeration cycle apparatus, and renewal method of refrigeration cycle apparatus |
| JP2008019857A (en) * | 2006-07-13 | 2008-01-31 | Sumitomo Heavy Ind Ltd | Horizontal bulk oil separator, and reservoir |
| JP2009085577A (en) * | 2007-10-03 | 2009-04-23 | Hitachi Appliances Inc | Refrigeration cycle equipment |
| CN101561208B (en) * | 2009-05-15 | 2010-12-08 | 宁波奥克斯电气有限公司 | Method for controlling oil return of air conditioners |
| CN105371530A (en) * | 2014-08-19 | 2016-03-02 | 广东美的暖通设备有限公司 | Outdoor units, outdoor unit system, multi-connected air conditioning unit and oil uniformizing control method for multi-connected air conditioning unit |
| CN105371530B (en) * | 2014-08-19 | 2018-06-29 | 广东美的暖通设备有限公司 | Outdoor unit, outdoor machine system, multi-variable air conditioning unit and its oily control method |
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