JPH1194375A - Air-conditioner - Google Patents
Air-conditionerInfo
- Publication number
- JPH1194375A JPH1194375A JP9259090A JP25909097A JPH1194375A JP H1194375 A JPH1194375 A JP H1194375A JP 9259090 A JP9259090 A JP 9259090A JP 25909097 A JP25909097 A JP 25909097A JP H1194375 A JPH1194375 A JP H1194375A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- compressor
- compressors
- refrigerant
- liquid
- 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.)
- Withdrawn
Links
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
- F25B2400/01—Heaters
-
- 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
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
-
- 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、冷媒を循環させて
内外気の熱交換を行う空気調和機に関し、特にシーズン
オフ時における圧縮機内の液面上昇の防止に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for circulating a refrigerant to exchange heat between inside and outside air, and more particularly to preventing a liquid level in a compressor from rising during off-season.
【０００２】[0002]
【従来の技術】近年、空気調和機において、室内または
室外熱交換機の複数化、運転能力の拡大および配管長の
増大等のため、必要とされる冷媒のチャージ量が大きく
なっているとともに、運転時の負荷に対する必要冷媒量
の変動が大きくなっている。このため、圧縮機にアキュ
ムレータを接続して、該アキュムレータで冷媒の気液分
離を行うとともに、低負荷で運転を行う場合に余剰冷媒
を貯留させる手段が採用されている。2. Description of the Related Art In recent years, in order to increase the number of indoor or outdoor heat exchangers, expand the operating capacity, and increase the pipe length of an air conditioner, the required amount of refrigerant charge has been increasing and the operation of the air conditioner has been increasing. The required refrigerant amount fluctuates greatly with respect to the load at the time. For this reason, means for connecting an accumulator to the compressor to separate the refrigerant into gas and liquid by the accumulator and to store the excess refrigerant when the operation is performed at a low load is adopted.
【０００３】しかしながら、このような空気調和機にお
いて、圧縮機の停止時に室外および室内熱交換機から冷
媒がアキュムレータに戻るとともに、さらにアキュムレ
ータから圧縮機内に液冷媒が多く戻り、希釈率〔冷媒量
／（潤滑油量＋冷媒量）〕が大きくなって圧縮機内の潤
滑油（冷凍機油）が希釈されてしまう現象（いわゆる液
バック）が生じてしまっていた。このため、圧縮機が再
び起動した際に、潤滑油による効果が低下して摺動部分
にかじりや焼付けが生じるおそれがあった。また、圧縮
機内の液冷媒量が増加すると、液面が上昇して圧縮機の
起動時に液圧縮によって圧縮機が壊れるおそれもあっ
た。However, in such an air conditioner, when the compressor is stopped, the refrigerant returns from the outdoor and indoor heat exchangers to the accumulator, and a large amount of liquid refrigerant returns from the accumulator into the compressor, resulting in a dilution ratio [refrigerant amount / ( (Lubricating oil amount + refrigerant amount)], and a phenomenon (so-called liquid back) in which the lubricating oil (refrigeration oil) in the compressor is diluted has occurred. For this reason, when the compressor is started again, the effect of the lubricating oil is reduced, and there is a possibility that galling or seizure may occur on the sliding portion. Also, when the amount of liquid refrigerant in the compressor increases, the liquid level rises, and the compressor may be broken by liquid compression when the compressor starts.
【０００４】この対策として、例えば、特開平６−３０
０３７０号公報には、アキュムレータ内の液冷媒が圧縮
機に多量に戻ることを防止する技術が提案されている。As a countermeasure against this, for example, Japanese Patent Application Laid-Open No. Hei 6-30
No. 0370 proposes a technique for preventing a large amount of liquid refrigerant in the accumulator from returning to the compressor.
【０００５】この種の空気調和機において、２つの圧縮
機を備えたものの冷媒回路を図２に示す。この空気調和
機は、圧縮機１Ａ，１Ｂの吸入側にアキュムレータ２を
接続するとともに、該アキュムレータ２の底部と圧縮機
１Ａ，１Ｂとをキャピラリチューブ３ａを有する油戻し
回路３Ａ，３Ｂでそれぞれ接続している。[0005] Fig. 2 shows a refrigerant circuit of this type of air conditioner provided with two compressors. In this air conditioner, an accumulator 2 is connected to the suction sides of the compressors 1A and 1B, and the bottom of the accumulator 2 and the compressors 1A and 1B are connected by oil return circuits 3A and 3B having a capillary tube 3a. ing.
【０００６】圧縮機１Ａに接続される油戻し回路３Ａ
は、圧縮機１Ａの冷媒ガス供給管４Ａに接続され、圧縮
機１Ｂに接続される油戻し回路３Ｂは、圧縮機１Ｂのハ
ウジングにおける冷媒ガス供給管４Ｂの接続位置より下
方に接続されている。また、圧縮機１Ａと圧縮機１Ｂと
は、均油管５で接続され、内部の混合液Ｌ（潤滑油＋液
冷媒）が互いに流通可能とされ、それぞれの液面を一定
にするように設定されている。Oil return circuit 3A connected to compressor 1A
Is connected to the refrigerant gas supply pipe 4A of the compressor 1A, and the oil return circuit 3B connected to the compressor 1B is connected below the connection position of the refrigerant gas supply pipe 4B in the housing of the compressor 1B. Further, the compressor 1A and the compressor 1B are connected by an oil equalizing pipe 5 so that the mixed liquid L (lubricating oil + liquid refrigerant) inside can be mutually circulated, and is set so that their liquid levels are constant. ing.
【０００７】上記の空気調和機は、運転時に室内および
室外熱交換機からの液冷媒の戻りが多く、アキュムレー
タ２内に滞留する混合液Ｌが増加した状態であっても、
キャピラリチューブ３ａを有する油戻し回路３Ａ，３Ｂ
によって混合液Ｌを流量制御して、アキュムレータ２か
ら圧縮機１Ａ，１Ｂへの液冷媒の戻りを制限し、圧縮機
内の潤滑油が液冷媒によって希釈されてしまうことを防
止しようとするものである。In the air conditioner described above, the liquid refrigerant from the indoor and outdoor heat exchangers often returns during operation, and even if the mixed liquid L staying in the accumulator 2 increases,
Oil return circuits 3A and 3B having a capillary tube 3a
Thus, the flow rate of the mixed liquid L is controlled to restrict the return of the liquid refrigerant from the accumulator 2 to the compressors 1A and 1B, thereby preventing the lubricating oil in the compressor from being diluted by the liquid refrigerant. .
【０００８】ところで、圧縮機１Ａ，１Ｂの圧縮部１ａ
が停止状態では、ガス化した冷媒が冷やされて液化する
とともに、圧縮機内の混合液Ｌ中に溶け込む（いわゆる
液寝込み）現象が生じ、液面が上昇してしまう場合があ
る。これを防ぐために、圧縮機１Ａ，１Ｂのハウジング
の下部にヒータ６が設けられ、圧縮部１ａが停止状態に
ある場合には、ヒータ６に通電して圧縮機内を加熱し
て、液寝込みを防ぐ手段が採用されている。By the way, the compression sections 1a of the compressors 1A and 1B
In the stopped state, the gasified refrigerant is cooled and liquefied, and a phenomenon of melting into the mixed liquid L in the compressor (so-called liquid stagnation) occurs, and the liquid level may rise. To prevent this, a heater 6 is provided at the lower part of the housing of the compressors 1A and 1B. When the compressor 1a is in a stopped state, the heater 6 is energized to heat the inside of the compressor, thereby preventing liquid stagnation. Means are employed.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、上記従
来の空気調和機には、以下のような課題が残されてい
る。すなわち、圧縮部１ａが運転状態にあるとき、また
は圧縮部１ａが停止状態であってもヒータ６が通電状態
にある場合には、圧縮機内部の温度が上昇しているの
で、液冷媒が気化されているが、シーズンオフ時におい
て、圧縮部１ａおよびヒータ６を駆動する元電源７がオ
フ状態とされている場合には、圧縮機内部の温度が低下
し、液寝込みが生じて圧縮機内の液面が上昇してしまう
とともに、潤滑油が希釈されてしまう不都合があった。
したがって、再び運転を開始する際に、液圧縮および油
膜切れ等によって圧縮機が損傷するおそれがあった。ま
た、圧縮機１Ａ，１Ｂとアキュムレータ２とは接続され
ており、冷媒が流通可能とされているが、圧縮部１ａ停
止時には、上述したようにアキュムレータ２内は室外ま
たは室内熱交換機等から戻った冷媒が多量に貯留される
ため、圧縮機内の増量した液冷媒をアキュムレータ２に
送ることができないという不都合があった。However, the above-mentioned conventional air conditioners have the following problems. That is, when the compressor 1a is in the operating state, or when the heater 6 is in the energized state even when the compressor 1a is in the stopped state, the temperature inside the compressor is increased, and the liquid refrigerant is vaporized. However, when the main power source 7 for driving the compressor 1a and the heater 6 is turned off at the time of off-season, the temperature inside the compressor decreases, and liquid stagnation occurs, and the inside of the compressor is reduced. The liquid level rises, and the lubricating oil is diluted.
Therefore, when the operation is started again, the compressor may be damaged due to liquid compression, oil film shortage, or the like. Further, the compressors 1A and 1B and the accumulator 2 are connected to allow the refrigerant to flow, but when the compression unit 1a is stopped, the interior of the accumulator 2 returns from the outdoor or indoor heat exchanger or the like as described above. Since a large amount of the refrigerant is stored, there is a disadvantage that the increased amount of the liquid refrigerant in the compressor cannot be sent to the accumulator 2.
【００１０】本発明は、前述の課題に鑑みてなされたも
ので、元電源が切られたシーズンオフ時においても圧縮
機内の液面上昇および潤滑油の希釈化を防止する空気調
和機を提供することを目的とする。The present invention has been made in view of the above-described problems, and provides an air conditioner that prevents a rise in the liquid level in a compressor and a dilution of lubricating oil even during off-season when the main power is turned off. The purpose is to:
【００１１】[0011]
【課題を解決するための手段】本発明は、前記課題を解
決するために以下の構成を採用した。すなわち、請求項
１記載の空気調和機では、吸入した冷媒ガスを圧縮処理
して室外熱交換機または室内熱交換機へと送る複数の圧
縮機と、これら圧縮機の吸入側に接続され液冷媒を貯留
するアキュムレータとを備えた空気調和機であって、前
記複数の圧縮機を互いに接続しこれら内部の液面を一定
にする均油管と、該均油管の途中に接続され潤滑油を貯
留する油タンクとを備えている技術が採用される。The present invention has the following features to attain the object mentioned above. That is, in the air conditioner according to the first aspect, a plurality of compressors for compressing the sucked refrigerant gas and sending the compressed refrigerant gas to the outdoor heat exchanger or the indoor heat exchanger, and connected to the suction side of these compressors to store the liquid refrigerant. An air conditioner provided with an accumulator that connects the plurality of compressors to each other to keep the liquid level inside the oil equalizing pipe, and an oil tank connected in the middle of the oil equalizing pipe to store lubricating oil The technology having the following is adopted.
【００１２】この空気調和機では、複数の圧縮機を互い
に接続しこれら内部の液面を一定にする均油管と、該均
油管の途中に接続され潤滑油を貯留する油タンクとを備
えているので、油タンク分だけ潤滑油が増量されること
から、全体的に希釈率の増加が緩和される。すなわち、
圧縮機が停止状態にあって圧縮機内に冷媒が戻ってきた
場合や元電源がオフ状態となるシーズンオフ時において
圧縮機内で冷媒が寝込んだ場合でも、潤滑油の絶対量が
増えているので、潤滑油の希釈が緩和される。また、余
剰油を油タンクに溜め込むことにより、圧縮機内の液面
上昇が抑制される。This air conditioner includes an oil equalizing pipe that connects a plurality of compressors to each other and keeps the liquid level inside the oil equalizing pipe, and an oil tank that is connected in the middle of the oil equalizing pipe and stores lubricating oil. Therefore, since the amount of the lubricating oil is increased by the amount of the oil tank, the increase in the dilution rate is moderated as a whole. That is,
Even if the compressor is stopped and the refrigerant returns to the compressor, or if the refrigerant stagnates in the compressor during off-season when the main power is off, the absolute amount of lubricating oil is increasing, Lubrication oil dilution is reduced. Further, by storing the surplus oil in the oil tank, a rise in the liquid level in the compressor is suppressed.
【００１３】請求項２記載の空気調和機では、請求項１
記載の空気調和機において、前記油タンクは、その上部
に前記均油管が接続されて均油管の下側に位置するよう
に配されている技術が採用される。[0013] In the air conditioner according to the second aspect, the first aspect.
In the air conditioner described above, a technique is adopted in which the oil tank is connected to an upper portion of the oil tank and is located below the oil equalizing tube.
【００１４】この空気調和機では、油タンクがその上部
に均油管が接続されて均油管の下側に位置するように配
されているので、圧縮機内の液面が上昇した場合に、生
じた圧力差で均油管を通して油タンク内に潤滑油が流入
しやすくなる。In this air conditioner, since the oil tank is connected to the upper part of the oil tank so as to be located below the oil equalizing pipe, the oil tank is generated when the liquid level in the compressor rises. The lubricating oil easily flows into the oil tank through the oil equalizing pipe due to the pressure difference.
【００１５】[0015]
【発明の実施の形態】以下、本発明に係る空気調和機の
一実施形態を図１を参照しながら説明する。この図にあ
って、符号１１Ａはインバータ圧縮機、１１Ｂは非イン
バータ圧縮機、１２はヒータ、１３はアキュムレータ、
１４は元電源を示している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the air conditioner according to the present invention will be described below with reference to FIG. In this figure, reference numeral 11A is an inverter compressor, 11B is a non-inverter compressor, 12 is a heater, 13 is an accumulator,
Reference numeral 14 denotes an original power supply.
【００１６】本実施形態の空気調和機は、図１に示すよ
うに、吸入した冷媒ガスを圧縮処理して室外または室内
熱交換機（図示せず）へと送るインバータ圧縮機１１Ａ
および非インバータ圧縮機１１Ｂと、これら圧縮機１１
Ａ，１１Ｂ内の液冷媒を加熱するヒータ１２と、これら
圧縮機１１Ａ，１１Ｂの吸入側に接続され液冷媒を貯留
するアキュムレータ１３と、圧縮機１１Ａ，１１Ｂとヒ
ータ１２とを駆動する元電源１４とを備えている。As shown in FIG. 1, the air conditioner of the present embodiment compresses the refrigerant gas that has been drawn in and sends it to an outdoor or indoor heat exchanger (not shown).
And the non-inverter compressor 11B,
A, 11B, a heater 12 for heating the liquid refrigerant in the compressors 11A, 11B, an accumulator 13 connected to the suction side of the compressors 11A, 11B for storing the liquid refrigerant, and a main power source 14 for driving the compressors 11A, 11B and the heater 12. And
【００１７】また、この空気調和機は、インバータ圧縮
機１１Ａおよび非インバータ圧縮機１１Ｂを互いに接続
しこれら内部の液面を一定にする均油管１５と、該均油
管１５の途中に接続され主に潤滑油（液冷媒を含む）を
貯留する油タンク１６とを備えている。なお、該油タン
ク１６は、その上部に均油管１５が接続されて均油管１
５の下側に位置するように配されている。The air conditioner also includes an oil equalizing pipe 15 for connecting the inverter compressor 11A and the non-inverter compressor 11B to each other to maintain a constant liquid level inside the oil equalizing pipe 15 and being connected in the middle of the oil equalizing pipe 15 to be mainly used. An oil tank 16 for storing lubricating oil (including liquid refrigerant). The oil tank 16 has an oil equalizing pipe 15 connected to the upper part thereof,
5 are arranged below.
【００１８】インバータ圧縮機１１Ａは、インバータ制
御により多段階に容量が可変される容量制御型の圧縮機
であり、非インバータ圧縮機１１Ｂは、運転状態および
停止状態の二つの状態で選択的に制御される定容量型の
圧縮機である。これら圧縮機１１Ａ，１１Ｂは、ハウジ
ング１１ａと、該ハウジング１１ａの内部上方に設置さ
れるとともに元電源１４に電気的に接続され冷媒ガスを
圧縮する圧縮部１１ｂとを備えている。圧縮部１１ｂの
下方、すなわちハウジング１１ａの内部下方には、潤滑
油と液冷媒との混合液Ｌが貯留状態とされている。The inverter compressor 11A is a capacity control type compressor in which the capacity is varied in multiple stages by inverter control. The non-inverter compressor 11B is selectively controlled in two states, an operating state and a stopped state. This is a constant capacity compressor. Each of the compressors 11A and 11B includes a housing 11a and a compression unit 11b which is installed above the inside of the housing 11a and is electrically connected to the main power supply 14 to compress the refrigerant gas. A mixed liquid L of lubricating oil and liquid refrigerant is stored below the compression section 11b, that is, below the inside of the housing 11a.
【００１９】前記ヒータ１２は、ハウジング１１ａの下
部外周に沿って環状に設置され、圧縮部ｂが停止状態に
ある場合、液寝込みを防止するため圧縮機１１Ａ，１１
Ｂ内を加熱して液冷媒を気化させ、冷媒の液化を防ぐも
のである。前記アキュムレータ１３の上部には、冷媒ガ
ス供給管２３Ａ，２３Ｂの一端がそれぞれ接続され、こ
れらの他端が圧縮機１１Ａ，１１Ｂのハウジング１１ａ
にそれぞれ接続されており、アキュムレータ１３内で気
液分離した冷媒ガスがアキュムレータ１３から圧縮機１
１Ａ，１１Ｂへ供給されるように配されている。さら
に、アキュムレータ１３の上部には、室外熱交換機（暖
房運転時）または室内熱交換機（冷房運転時）からの冷
媒を四方弁２２を介してアキュムレータ１３に流入させ
る流入管２４が接続されている。The heater 12 is installed annularly along the outer periphery of the lower part of the housing 11a, and when the compression part b is in a stopped state, the compressors 11A, 11A are used to prevent liquid stagnation.
The inside of B is heated to vaporize the liquid refrigerant, thereby preventing the refrigerant from being liquefied. One end of each of refrigerant gas supply pipes 23A and 23B is connected to an upper portion of the accumulator 13, and the other ends thereof are connected to housings 11a of the compressors 11A and 11B.
The refrigerant gas, which has been gas-liquid separated in the accumulator 13, is supplied from the accumulator 13 to the compressor 1
1A and 11B. Further, an inflow pipe 24 that allows the refrigerant from the outdoor heat exchanger (during the heating operation) or the indoor heat exchanger (during the cooling operation) to flow into the accumulator 13 via the four-way valve 22 is connected to an upper portion of the accumulator 13.
【００２０】また、アキュムレータ１３の底部には、油
戻し管２５Ａ，２５Ｂの一端がそれぞれ接続されてい
る。油戻し回路２５Ａは、その他端が冷媒ガス供給管２
３Ａのインバータ圧縮機１１Ａ側に連結されて、インバ
ータ圧縮機１１Ａに接続され、油戻し回路２５Ｂは、そ
の他端が非インバータ圧縮機１１Ｂのハウジング１１ａ
における冷媒ガス供給管２３Ｂの接続位置より下方に接
続されている。油戻し管２５Ａ，２５Ｂは、その途中に
所定の流量抵抗を有するキャピラリチューブ２５ａを備
え、アキュムレータ１３内で分離した液冷媒（潤滑油を
含む）を流量制御しながら圧縮機１１Ａ，１１Ｂ内に戻
すように配されている。The bottom of the accumulator 13 is connected to one end of each of oil return pipes 25A and 25B. The oil return circuit 25A has a refrigerant gas supply pipe 2 at the other end.
The oil return circuit 25B is connected to the inverter compressor 11A side of 3A and connected to the inverter compressor 11A, and the other end of the oil return circuit 25B is connected to the housing 11a of the non-inverter compressor 11B.
Is connected below the connection position of the refrigerant gas supply pipe 23B. The oil return pipes 25A and 25B include a capillary tube 25a having a predetermined flow resistance in the middle thereof, and return the liquid refrigerant (including lubricating oil) separated in the accumulator 13 to the inside of the compressors 11A and 11B while controlling the flow rate. It is arranged as follows.
【００２１】室外熱交換機および室内熱交換機は、室外
側配管３３および室内側配管３４でそれぞれ四方弁２２
と接続され、該四方弁２２を介してアキュムレータ１３
と接続される流入管２４または圧縮機１１Ａ，１１Ｂと
接続される上部配管２０にそれぞれ接続される。該上部
配管２０は、途中で分岐配管２０Ａ，２０Ｂに分岐され
るとともに、これら分岐配管２０Ａ，２０Ｂは圧縮機１
１Ａ，１１Ｂの上部にそれぞれ接続されている。The outdoor heat exchanger and the indoor heat exchanger are connected to a four-way valve 22 by an outdoor pipe 33 and an indoor pipe 34, respectively.
Is connected to the accumulator 13 through the four-way valve 22.
And an upper pipe 20 connected to the compressors 11A and 11B. The upper pipe 20 is branched into branch pipes 20A and 20B on the way, and these branch pipes 20A and 20B are connected to the compressor 1.
They are connected to the upper portions of 1A and 11B, respectively.
【００２２】すなわち、圧縮部１１ｂで圧縮処理された
冷媒ガスは、上部配管２０を介して室外熱交換機または
室内熱交換機への室外側配管３３または室内側配管３４
に四方弁２２によって選択的に送出される。前記室外側
配管３３または室内側配管３４は、冷媒ガスを流通させ
るもので、メインガスラインと呼ばれている。なお、室
外および室内熱交換機は、暖房運転時にそれぞれ蒸発器
および凝縮器として機能し、冷房運転時にそれぞれ凝縮
器および蒸発器として機能する。That is, the refrigerant gas compressed in the compression section 11b is supplied to the outdoor heat exchanger or the indoor heat exchanger via the upper pipe 20 to the outdoor pipe 33 or the indoor pipe 34.
Is selectively delivered by the four-way valve 22. The outdoor side pipe 33 or the indoor side pipe 34 circulates a refrigerant gas and is called a main gas line. The outdoor and indoor heat exchangers function as an evaporator and a condenser during a heating operation, respectively, and function as a condenser and an evaporator during a cooling operation, respectively.
【００２３】この空気調和機では、圧縮機１１Ａ，１１
Ｂを互いに接続しこれら内部の液面を一定にする均油管
１５と、該均油管１５の途中に接続される油タンク１６
とを備えているので、油タンク１６分だけ潤滑油が増量
されることから、全体的に希釈率の増加が緩和される。
すなわち、圧縮機１１Ａ，１１Ｂが停止状態にあって圧
縮機内に冷媒が戻ってきた場合や元電源１４がオフ状態
となるシーズンオフ時において圧縮機内で冷媒が寝込ん
だ場合でも、潤滑油の絶対量が増えているので、潤滑油
の希釈が緩和される。In this air conditioner, the compressors 11A, 11A
B, and an oil tank 16 connected in the middle of the oil equalizing pipe 15 to make the liquid level inside thereof uniform.
Since the amount of the lubricating oil is increased by the amount corresponding to the oil tank 16, the increase in the dilution rate is moderated as a whole.
That is, even when the refrigerant returns to the compressor while the compressors 11A and 11B are stopped, or when the refrigerant stagnates in the compressor during off-season when the main power supply 14 is turned off, the absolute amount of the lubricating oil , The dilution of the lubricating oil is eased.
【００２４】また、余剰油を油タンク１６に溜め込むこ
とにより、圧縮機１１Ａ，１１Ｂ内の液面上昇が抑制さ
れる。すなわち、油タンク１６は、潤滑油のリザーバー
タンクとして機能する。さらに、油タンク１６が、その
上部に均油管１５が接続されて均油管１５の下側に位置
するように配されているので、圧縮機内の液面が上昇し
た場合に、生じた圧力差で均油管１５を通して油タンク
１６内に潤滑油が流入しやすくなる。Further, by storing the surplus oil in the oil tank 16, a rise in the liquid level in the compressors 11A and 11B is suppressed. That is, the oil tank 16 functions as a reservoir tank for lubricating oil. Further, the oil tank 16 is arranged so that the oil equalizing pipe 15 is connected to the upper part thereof and is located below the oil equalizing pipe 15, so that when the liquid level in the compressor rises, a pressure difference generated is caused. Lubricating oil flows easily into the oil tank 16 through the oil equalizing pipe 15.
【００２５】なお、本発明は、次のような実施形態をも
含むものである。 （１）上記実施形態では、インバータ圧縮機１１Ａおよ
び非インバータ圧縮機１１Ｂの２つの圧縮機を搭載した
ものに適用したが、３以上の圧縮機を搭載したものに採
用しても構わない。 （２）また、室外熱交換機および室内熱交換機をそれぞ
れ一つ設置したが、それぞれ複数設けたものに適用して
も構わない。Note that the present invention also includes the following embodiments. (1) In the above embodiment, the present invention is applied to the one equipped with the two compressors of the inverter compressor 11A and the non-inverter compressor 11B, but may be adopted to the one equipped with three or more compressors. (2) Also, although one outdoor heat exchanger and one indoor heat exchanger are provided, each may be applied to a plurality of heat exchangers.
【００２６】[0026]
【発明の効果】本発明によれば、以下の効果を奏する。 （１）請求項１記載の空気調和機によれば、複数の圧縮
機を互いに接続しこれら内部の液面を一定にする均油管
と、該均油管の途中に接続され潤滑油を貯留する油タン
クとを備えているので、油タンク分だけ潤滑油が増量さ
れて全体的に希釈率を緩和させることができる。すなわ
ち、元電源がオフ状態となるシーズンオフ時において、
圧縮機内で冷媒が寝込んでも潤滑油の絶対量が増えてい
るので、潤滑油の希釈が緩和され、油膜切れによる圧縮
機の損傷を防止することができる。また、余剰油を油タ
ンクに溜め込むことにより、圧縮機内の液面上昇を抑制
して液圧縮による圧縮機の損傷を防ぐこともできる。According to the present invention, the following effects can be obtained. (1) According to the air conditioner of the first aspect, an oil equalizing pipe that connects a plurality of compressors to each other and keeps the liquid level inside thereof, and an oil that is connected in the middle of the oil equalizing pipe and stores lubricating oil Since the tank is provided, the amount of lubricating oil is increased by the amount of the oil tank, and the dilution rate can be reduced as a whole. That is, during the off-season when the main power supply is turned off,
Since the absolute amount of the lubricating oil is increased even if the refrigerant stagnates in the compressor, dilution of the lubricating oil is eased, and damage to the compressor due to lack of oil film can be prevented. Further, by storing the surplus oil in the oil tank, it is possible to suppress a rise in the liquid level in the compressor and prevent damage to the compressor due to liquid compression.
【００２７】（２）請求項２記載の空気調和機によれ
ば、油タンクが、その上部に均油管が接続されて均油管
の下側に位置するように配されているので、圧縮機内の
液面が上昇した場合に、生じた圧力差で均油管を通して
油タンク内に潤滑油が流入しやすくなる。(2) According to the air conditioner of the second aspect, the oil tank is arranged so that the oil equalizing pipe is connected to the upper part thereof and located below the oil equalizing pipe. When the liquid level rises, lubricating oil easily flows into the oil tank through the oil equalizing pipe due to the generated pressure difference.
【図１】 本発明に係る空気調和機の一実施形態を示す
要部の冷媒回路図である。FIG. 1 is a main part refrigerant circuit diagram showing an embodiment of an air conditioner according to the present invention.
【図２】 本発明に係る空気調和機の従来例を示す要部
の冷媒回路図である。FIG. 2 is a refrigerant circuit diagram of a main part showing a conventional example of an air conditioner according to the present invention.
１１Ａ インバータ圧縮機 １１Ｂ 非インバータ圧縮機 １２ ヒータ １３ アキュムレータ １４ 元電源 １５ 均油管 １６ 油タンク Ｌ 混合液 11A Inverter compressor 11B Non-inverter compressor 12 Heater 13 Accumulator 14 Main power supply 15 Oil equalizer 16 Oil tank L Mixture
Claims (2)
交換機または室内熱交換機へと送る複数の圧縮機と、 これら圧縮機の吸入側に接続され液冷媒を貯留するアキ
ュムレータとを備えた空気調和機であって、 前記複数の圧縮機を互いに接続しこれら内部の液面を一
定にする均油管と、 該均油管の途中に接続され潤滑油を貯留する油タンクと
を備えていることを特徴とする空気調和機。1. An air system comprising: a plurality of compressors for compressing suctioned refrigerant gas and sending the compressed refrigerant gas to an outdoor heat exchanger or an indoor heat exchanger; and an accumulator connected to a suction side of the compressor for storing a liquid refrigerant. A conditioner, comprising: an oil equalizing pipe that connects the plurality of compressors to each other to keep the liquid level inside the oil equalizing pipe; and an oil tank that is connected in the middle of the oil equalizing pipe and stores lubricating oil. A characteristic air conditioner.
油管の下側に位置するように配されていることを特徴と
する空気調和機。2. The air conditioner according to claim 1, wherein the oil tank is connected to an upper portion of the oil tank and is located below the oil equalizing tube. Harmony machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9259090A JPH1194375A (en) | 1997-09-24 | 1997-09-24 | Air-conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9259090A JPH1194375A (en) | 1997-09-24 | 1997-09-24 | Air-conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1194375A true JPH1194375A (en) | 1999-04-09 |
Family
ID=17329183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9259090A Withdrawn JPH1194375A (en) | 1997-09-24 | 1997-09-24 | Air-conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1194375A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100693533B1 (en) | 2005-12-20 | 2007-03-14 | 엘지전자 주식회사 | Temperature adjusting structure and method of balancing oil pipe for air conditioner |
| CN110764240A (en) * | 2014-01-30 | 2020-02-07 | 卡伊拉布斯公司 | Device for processing optical radiation |
-
1997
- 1997-09-24 JP JP9259090A patent/JPH1194375A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100693533B1 (en) | 2005-12-20 | 2007-03-14 | 엘지전자 주식회사 | Temperature adjusting structure and method of balancing oil pipe for air conditioner |
| CN110764240A (en) * | 2014-01-30 | 2020-02-07 | 卡伊拉布斯公司 | Device for processing optical radiation |
| CN110764240B (en) * | 2014-01-30 | 2021-06-01 | 卡伊拉布斯公司 | Device for processing optical radiation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20041207 |