JP2012184904A - Oil replenishing device for refrigeration air conditioner - Google Patents

Oil replenishing device for refrigeration air conditioner Download PDF

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JP2012184904A
JP2012184904A JP2011049883A JP2011049883A JP2012184904A JP 2012184904 A JP2012184904 A JP 2012184904A JP 2011049883 A JP2011049883 A JP 2011049883A JP 2011049883 A JP2011049883 A JP 2011049883A JP 2012184904 A JP2012184904 A JP 2012184904A
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oil
oil chamber
refrigeration air
air conditioner
chamber
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JP5492359B2 (en
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Satoshi Hoshino
聡 星野
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Mitsubishi Electric Building Solutions Corp
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Mitsubishi Electric Building Techno Service Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an oil replenishing device for a refrigeration air conditioner capable of replenishing an oil for the refrigeration air conditioner to a screw-type compressor in maintenance, and replacing the oil for the refrigeration air conditioner of the compressor.SOLUTION: This replenishing device 10 includes: a waste oil chamber 12 for storing waste oil recovered from the refrigeration air conditioner including the compressor; a replenishment oil chamber 14 communicated with the waste oil chamber 12 through a communication pipe 16 and storing the replenishment oil to be replenished to the refrigeration air conditioner; a high-pressure valve 18 connected to an upper region of the waste oil chamber 12 and connectable to a high pressure-side of the compressor; and a low pressure valve 24 connected to a bottom section of the replenishment oil chamber 14 and connectable to a low pressure side of the compressor. The communication pipe 16 is connected to top sections of the waste oil chamber 12 and the replenishment oil chamber 14. By applying this constitution, the oil can be replenished to the compressor, and further the oil of the compressor can be replaced.

Description

本発明は、冷凍空調機の保守時に、圧縮機に冷凍空調機用油を補充する可搬式の補充装置の改良に関する。   The present invention relates to an improvement of a portable replenishing device that replenishes a compressor with oil for a refrigerating air conditioner during maintenance of the refrigerating air conditioner.

従来から、冷媒回路を有し、この回路で冷媒を循環させて、対象空間を冷却する冷凍機又は空調機などの冷凍空調機が知られている。この冷凍空調機の構成の一例について図６を用いて説明する。   Conventionally, a refrigerating air conditioner such as a refrigerating machine or an air conditioner that has a refrigerant circuit and circulates the refrigerant in this circuit to cool a target space is known. An example of the configuration of the refrigeration air conditioner will be described with reference to FIG.

冷凍空調機１１０は、冷媒が循環する冷媒回路１１２を有する。冷媒回路１１２には、圧縮機１１４と凝縮器１１６と、膨張弁１１８と、冷却器１２０と、アキュムレータ１２２とが順に並んで配置される。   The refrigeration air conditioner 110 has a refrigerant circuit 112 through which the refrigerant circulates. In the refrigerant circuit 112, a compressor 114, a condenser 116, an expansion valve 118, a cooler 120, and an accumulator 122 are arranged in order.

圧縮機１１４は、流入する低圧の気体冷媒を圧縮して高圧の気体冷媒にする。凝縮器１１６は、圧縮機１１４により高圧状態にされた気体冷媒から熱を奪って液化させる。膨張弁１１８は、凝縮器１１６からの高圧の液体冷媒を膨張させて低圧の液体冷媒にする。   The compressor 114 compresses the inflowing low-pressure gas refrigerant into a high-pressure gas refrigerant. The condenser 116 removes heat from the gaseous refrigerant brought to a high pressure state by the compressor 114 and liquefies it. The expansion valve 118 expands the high-pressure liquid refrigerant from the condenser 116 into a low-pressure liquid refrigerant.

冷却器１２０は、膨張弁１１８により低圧状態にされた液体冷媒を気化させる。この気化の際の吸熱作用により、周囲の空気を冷却する。冷却器１２０に設けられる送風機１２４が、この冷却された空気を環境試験室に送り出す。   The cooler 120 vaporizes the liquid refrigerant that has been brought to a low pressure state by the expansion valve 118. The surrounding air is cooled by the endothermic action during the vaporization. A blower 124 provided in the cooler 120 sends out the cooled air to the environmental test chamber.

アキュムレータ１２２は、冷却器１２０で気化しなかった液体冷媒を貯める容器である。アキュムレータ１２２は、気体冷媒に混合する液体冷媒を除去して貯めることで、圧縮機１１４への液体冷媒の流入を防ぎ、圧縮機１１４の故障を防止する。   The accumulator 122 is a container that stores liquid refrigerant that has not been vaporized by the cooler 120. The accumulator 122 removes and stores the liquid refrigerant mixed with the gas refrigerant, thereby preventing the liquid refrigerant from flowing into the compressor 114 and preventing the compressor 114 from malfunctioning.

このように構成される冷凍空調機１１０においては、冷媒回路１１２を循環する冷媒が、冷却器１２０で対象空間内の熱を奪い、その熱を凝縮器１１６で、例えば外部に放熱することで、対称空間内の冷却を行なうことができる。   In the refrigeration air conditioner 110 configured as described above, the refrigerant circulating in the refrigerant circuit 112 takes heat in the target space by the cooler 120, and dissipates the heat to the outside by the condenser 116, for example, Cooling in a symmetric space can be performed.

一般的に、圧縮機には、この内部を潤滑する潤滑油として、冷凍空調機用油が充填されている。この油は、例えばエステル油であり、冷媒（Ｒ−４０７Ｃ，Ｒ−４０４Ａなど）に溶け込みやすい特性を有している。この特性により、油が冷媒とともに冷媒回路内に供給されてしまい、圧縮機内における潤滑性が低下してしまうという問題がある。そこで、作業員が、保守時に、可搬式の油補充装置により圧縮機に油を補充している。   Generally, a compressor is filled with refrigeration air conditioner oil as a lubricating oil for lubricating the inside. This oil is, for example, an ester oil, and has a characteristic that it is easily dissolved in a refrigerant (R-407C, R-404A, etc.). Due to this characteristic, oil is supplied into the refrigerant circuit together with the refrigerant, and there is a problem that the lubricity in the compressor is lowered. Therefore, an operator replenishes the compressor with oil by a portable oil replenishing device during maintenance.

下記特許文献１には、圧縮機の持つ高圧と低圧の差圧を利用して、圧縮機のクランク室に油を補充する冷凍機油の補充装置が記載されている。この補充装置は、ケース本体と、ケース本体内を気体室と液体室とに隔絶するとともにそれらの室の容積を可変するシリンダー部とを有する。気体室が、ホースを介して圧縮機の高圧側に接続され、補充用の油で満たされた液体室が、ホースを介して圧縮機の低圧側に接続される。   The following Patent Document 1 describes a refrigerating machine oil replenishing device that replenishes oil in a crank chamber of a compressor by using a differential pressure between a high pressure and a low pressure of the compressor. This replenishing device has a case main body and a cylinder portion that isolates the inside of the case main body into a gas chamber and a liquid chamber and changes the volume of these chambers. A gas chamber is connected to the high pressure side of the compressor via a hose, and a liquid chamber filled with replenishing oil is connected to the low pressure side of the compressor via a hose.

このような構成で、両室と圧縮機をそれぞれ連通させることにより、両室の圧力が均衡するまでシリンダー部が液体室側へと移動する。このシリンダー部の移動により液体室の容積が小さくなるので、ポンプ等の動力を使用しなくとも、その液体室内の油が押し出されて圧縮機のクランク室に補充される。   With such a configuration, by communicating both chambers and the compressor, the cylinder portion moves to the liquid chamber side until the pressures in both chambers are balanced. Since the volume of the liquid chamber is reduced by the movement of the cylinder portion, the oil in the liquid chamber is pushed out and replenished to the crank chamber of the compressor without using power such as a pump.

特許第４０１５４５７号公報Japanese Patent No. 4015457

上記特許文献１のような冷凍機油の補充装置においては、圧縮機に油を補充することができる。しかしながら、圧縮機内の油が劣化して交換を必要とするとき、その補充装置だけでは、圧縮機内の油を交換することができない。このため、油の交換作業には、補充装置のほかに、圧縮機内の油を回収する回収装置が必要になってしまう。そうすると、油の交換作業では、作業場所まで、２つの装置を搬送しなければならず、手間がかかってしまう。また、油の交換作業では、圧縮機と各装置との着脱が少なくとも計２回必要となり、作業時間がかかってしまうという問題がある。特に、圧縮機内にオイルパンが設けられていない、スクリュー型の圧縮機においては、レシプロ型の圧縮機のようにオイルパンから容易に油を抜くことができず、油の交換作業に手間がかかってしまうという問題がある。   In the refrigerating machine oil replenishment device as in Patent Document 1, oil can be replenished to the compressor. However, when the oil in the compressor deteriorates and needs to be replaced, the oil in the compressor cannot be replaced only by the replenishing device. For this reason, in addition to the replenishing device, a recovery device that recovers the oil in the compressor is required for the oil replacement operation. If it does so, in an oil exchange operation | work, two apparatuses must be conveyed to a work place, and it will take an effort. In addition, in the oil replacement operation, it is necessary to attach and detach the compressor and each device at least twice in total, and there is a problem that it takes work time. In particular, in a screw type compressor in which an oil pan is not provided in the compressor, it is not possible to easily drain oil from the oil pan as in a reciprocating type compressor. There is a problem that it ends up.

本発明の目的は、保守時に、スクリュー型の圧縮機に冷凍空調機用油を補充することができるとともに、その圧縮機の冷凍空調機用油を交換することもできる冷凍空調機用油の補充装置を提供することにある。   The object of the present invention is to replenish the refrigerating air conditioner oil that can replenish the refrigerating air conditioner oil to the screw-type compressor and also replace the refrigerating air conditioner oil of the compressor during maintenance. To provide an apparatus.

本発明の冷凍空調機用油の補充装置は、スクリュー型圧縮機を含む冷凍空調機から回収する廃油を収容する廃油室と、廃油室と連通管を介して連通し、冷凍空調機へ補充する補充油を収容する補充油室と、廃油室の上方領域に接続されるとともに、前記圧縮機の高圧側に接続可能な高圧バルブと、補充油室の底部に接続されるとともに、前記圧縮機の低圧側に接続可能な低圧バルブと、を有し、連通管は、廃油室と補充油室の頂部にそれぞれ接続されることを特徴とする。   The refrigerating and refrigerating machine oil replenishing device of the present invention is replenished to a refrigerating air conditioner that communicates with a waste oil chamber that contains waste oil collected from a refrigerating air conditioner including a screw compressor and a waste oil chamber through a communication pipe. A replenishing oil chamber for containing replenishing oil, a high pressure valve connected to the upper region of the waste oil chamber, connectable to the high pressure side of the compressor, a bottom of the replenishing oil chamber, and the compressor A low-pressure valve connectable to the low-pressure side, and the communication pipe is connected to the tops of the waste oil chamber and the supplementary oil chamber, respectively.

また、高圧バルブに接続する廃油室の空間と、連通管に接続する廃油室の空間とを隔てるように設けられ、補充油室側への廃油の通過を防止するデミスタを有することができる。   In addition, a waste oil chamber space connected to the high-pressure valve and a waste oil chamber space connected to the communication pipe are provided so as to separate the waste oil chamber from the refill oil chamber side.

また、補充油室に接続されるとともに、補充油の供給源に接続可能な供給バルブを有することができる。   In addition, it is possible to have a supply valve that is connected to the replenishing oil chamber and that can be connected to a replenishing oil supply source.

また、補充油室の頂部または連通管のいずれかに接続されるとともに、各室内の気体を吸引する吸引源に接続可能な吸引バルブを有することができる。   In addition, the suction valve can be connected to either the top of the replenishing oil chamber or the communication pipe, and can be connected to a suction source that sucks the gas in each chamber.

また、吸引バルブとの接続部より廃油室側の連通管には、この連通管を開閉可能な開閉バルブが設けられることが好適である。   Moreover, it is preferable that an open / close valve capable of opening and closing the communication pipe is provided in the communication pipe on the waste oil chamber side from the connection portion with the suction valve.

また、連通管における開閉バルブより補充油室側に、圧力計が設けられることが好適である。   In addition, it is preferable that a pressure gauge is provided on the replenishing oil chamber side from the open / close valve in the communication pipe.

また、廃油室の底部に接続されるとともに、廃油室の廃油を回収する回収源に接続可能な回収バルブを有することができる。   Moreover, it can have a collection | recovery valve which can be connected to the collection | recovery source which collects the waste oil of a waste oil chamber while being connected to the bottom part of a waste oil chamber.

また、廃油室と補充油室とは同じ形状であるとともに、これらの室の底部が同一の水平面に位置するように設けられ、廃油室と補充油室に油面計が設けられることが好適である。   Further, it is preferable that the waste oil chamber and the replenishing oil chamber have the same shape, the bottom portions of these chambers are provided on the same horizontal plane, and the oil level gauge is provided in the waste oil chamber and the replenishing oil chamber. is there.

また、補充油室には、油面の位置を計測するフロートが設けられることが好適である。   Moreover, it is preferable that the replenishing oil chamber is provided with a float for measuring the position of the oil surface.

本発明の冷凍空調機用油の補充装置によれば、保守時に、スクリュー型の圧縮機に冷凍空調機用油を補充することができるとともに、その圧縮機の冷凍空調機用油を交換することもできる。   According to the refrigerating air conditioner oil replenishing device of the present invention, during maintenance, the screw type compressor can be replenished with refrigerating air conditioner oil and the compressor refrigerating air conditioner oil can be replaced. You can also.

本実施形態に係る冷凍空調機用油の補充装置の構成を示す図である。It is a figure which shows the structure of the replenishment apparatus of the oil for refrigeration air conditioners which concerns on this embodiment. 冷凍空調機用油を補充する補充作業手順を示す表である。It is a table | surface which shows the replenishment work procedure which replenishes the oil for refrigerating air conditioners. 図２のステップＣにおける状態を示す図である。It is a figure which shows the state in step C of FIG. 冷凍空調機用油を交換する交換作業手順を示す表である。It is a table | surface which shows the exchange work procedure which replaces | exchanges the oil for refrigerating air conditioners. 図４のステップＥにおける状態を示す図である。It is a figure which shows the state in step E of FIG. 冷凍空調機の構成の一例を示す図である。It is a figure which shows an example of a structure of a refrigerating air conditioner.

以下、本発明に係る冷凍空調機用油の補充装置の実施形態について、図１を用いて説明する。図１は、本実施形態に係る冷凍空調機用油の補充装置の構成を示す図である。   Hereinafter, an embodiment of an oil replenishing device for a refrigerating and air-conditioning apparatus according to the present invention will be described with reference to FIG. FIG. 1 is a diagram illustrating a configuration of a refrigerating air conditioner oil replenishing device according to the present embodiment.

冷凍空調機用油の補充装置（以下、単に「補充装置」と記す）１０は、保守時に、冷凍空調機のスクリュー型圧縮機（以下、単に「圧縮機」と記す）に冷凍空調機用油を補充する装置であるとともに、その圧縮機の冷凍空調機用油を交換する装置としても使用可能である。冷凍空調機用油（以降、単に「油」と記す）は、例えばエステル油であり、冷凍空調機の冷媒回路に使用される冷媒（Ｒ−４０７Ｃ，Ｒ−４０４Ａなど）に溶け込みやすい特性を有している。   A refrigerating air conditioner oil replenishing device (hereinafter simply referred to as “replenishing device”) 10 is used in a refrigerating air conditioner screw type compressor (hereinafter simply referred to as “compressor”) during maintenance. And a device for replacing the oil for the refrigeration air conditioner of the compressor. Refrigeration air conditioner oil (hereinafter simply referred to as “oil”) is, for example, ester oil, and has a characteristic that it easily dissolves in refrigerants (R-407C, R-404A, etc.) used in the refrigerant circuit of the refrigeration air conditioner. is doing.

補充装置１０は、冷凍空調機（図示せず）から回収する油を収容する廃油室１２と、冷凍空調機へ補充する油を収容する補充油室１４とを有する。廃油室１２と補充油室１４は、連通管１６を介して連通する。冷凍空調機から回収する油は、回収後に廃棄する油であるので、この油を以降、廃油と記す。一方、冷凍空調機に補充する油を、廃油と区別すべく以降、補充油と記す。   The replenishing device 10 includes a waste oil chamber 12 that stores oil recovered from a refrigeration air conditioner (not shown), and a replenishment oil chamber 14 that stores oil to be replenished to the refrigeration air conditioner. The waste oil chamber 12 and the replenishment oil chamber 14 communicate with each other via a communication pipe 16. Since the oil recovered from the refrigeration air conditioner is oil that is discarded after recovery, this oil is hereinafter referred to as waste oil. On the other hand, oil to be replenished to the refrigeration air conditioner will be referred to as replenishment oil hereinafter to distinguish it from waste oil.

廃油室１２は、ボンベなどの耐圧力容器であり、所定の正圧又は負圧にも耐え得る容器である。廃油室１２には、廃油の油面の位置が目視可能な油面計１２ａが設けられる。この油面計１２ａは、ガラス、アクリルなどの透明度の高い材質からなり、廃油室１２に回収された廃油量が視認できる。油面計１２ａは、少なくとも、廃油室１２の廃油の油面が最も高いレベル、すなわち満油レベルを視認可能に設けられることが好適である。   The waste oil chamber 12 is a pressure-resistant container such as a cylinder and can withstand a predetermined positive pressure or negative pressure. The waste oil chamber 12 is provided with an oil level gauge 12a that allows visual observation of the position of the oil level of the waste oil. The oil level gauge 12a is made of a highly transparent material such as glass or acrylic, and the amount of waste oil collected in the waste oil chamber 12 can be visually recognized. The oil level gauge 12a is preferably provided so that at least the oil level of the waste oil in the waste oil chamber 12 is the highest, that is, the full oil level is visible.

廃油室１２には、これの上方領域に、圧縮機の高圧側（図示せず）に接続可能な高圧バルブ１８が接続される。上方領域とは、満油レベルより上方の領域のことである。高圧バルブ１８と廃油室１２との間の流路には、廃油に含まれる水分を除去する水分除去装置１９が配置される。高圧バルブ１８と圧縮機の高圧側とはホースを介して接続されるので、高圧バルブ１８の端部に、そのホースとの着脱が容易な接続用ポートが設けられることが好適である。   A high pressure valve 18 that can be connected to a high pressure side (not shown) of the compressor is connected to the waste oil chamber 12 in an upper region thereof. The upper region is a region above the full oil level. In the flow path between the high-pressure valve 18 and the waste oil chamber 12, a water removal device 19 that removes water contained in the waste oil is disposed. Since the high-pressure valve 18 and the high-pressure side of the compressor are connected via a hose, it is preferable that a connection port that can be easily attached to and detached from the hose is provided at the end of the high-pressure valve 18.

また、廃油室１２には、これの底部に、廃油室１２の廃油を回収する回収源（図示せず）に接続可能な回収バルブ２０が接続される。回収源は、密閉可能なタンクからなる廃油容器である。回収バルブ２０と廃油室１２との間の流路には、この流路を流れる廃油の状況が目視可能な油面計２２が設けられる。この油面計２２は、ガラス、アクリルなどの透明度の高い材質からなり、回収源に回収される廃油の状況が視認できる。回収バルブ２０と回収源とはホースを介して接続されるので、回収バルブ２０の端部に、そのホースとの着脱が容易な接続用ポートが設けられることが好適である。なお、本実施形態においては、廃油室１２に回収バルブ２０が接続される場合について説明したが、本発明はこの構成に限定されず、廃油室１２が回収源を兼ねるのであれば、回収バルブ２０を設けなくてもよい。   Further, a recovery valve 20 that can be connected to a recovery source (not shown) for recovering the waste oil in the waste oil chamber 12 is connected to the bottom of the waste oil chamber 12. The recovery source is a waste oil container composed of a sealable tank. An oil level gauge 22 is provided in the flow path between the recovery valve 20 and the waste oil chamber 12 so that the state of waste oil flowing through the flow path can be visually observed. The oil level gauge 22 is made of a highly transparent material such as glass or acrylic, and the status of waste oil recovered in the recovery source can be visually confirmed. Since the collection valve 20 and the collection source are connected via a hose, it is preferable that a connection port that can be easily attached to and detached from the hose is provided at the end of the collection valve 20. In the present embodiment, the case where the recovery valve 20 is connected to the waste oil chamber 12 has been described. However, the present invention is not limited to this configuration, and the recovery valve 20 may be used as long as the waste oil chamber 12 also serves as a recovery source. May not be provided.

さらに、廃油室１２には、冷媒などの気体は通過させるが、廃油の通過を防止するフィルターであるデミスタ２３が設けられる。デミスタ２３は、高圧バルブ１８に接続する廃油室１２の空間と、連通管１６に接続する廃油室１２の空間とを隔てるように設けられる。この構成により、補充油室１４側への廃油の通過を防止することができる。具体的には、デミスタ２３は、圧縮機の高圧側から高圧バルブ１８を介して廃油室１２に廃油が流入する空間と、連通管１６に接続する空間とを隔てているので、廃油室１２に流入した廃油が連通管１６を通って補充室１４側へ流れ込むことを防止することができる。なお、本実施形態においては、廃油室１２にデミスタ２３を設ける場合について説明したが、本発明はこの構成に限定されず、交換作業において、廃油の一部が補充油に混合してしまうことが許容可能であれば、デミスタ２３を設けなくてもよい。   Further, the waste oil chamber 12 is provided with a demister 23 that is a filter that allows a gas such as a refrigerant to pass therethrough but prevents the waste oil from passing therethrough. The demister 23 is provided so as to separate the space of the waste oil chamber 12 connected to the high-pressure valve 18 and the space of the waste oil chamber 12 connected to the communication pipe 16. With this configuration, it is possible to prevent waste oil from passing to the refilling oil chamber 14 side. Specifically, the demister 23 separates the space where the waste oil flows into the waste oil chamber 12 from the high pressure side of the compressor via the high pressure valve 18 and the space connected to the communication pipe 16. The inflowing waste oil can be prevented from flowing into the replenishing chamber 14 through the communication pipe 16. In the present embodiment, the case where the demister 23 is provided in the waste oil chamber 12 has been described. However, the present invention is not limited to this configuration, and part of the waste oil may be mixed with the supplementary oil in the replacement operation. If acceptable, the demister 23 may not be provided.

補充油室１４は、廃油室１２と同様に、ボンベなどの耐圧力容器であり、所定の正圧又は負圧にも耐え得る容器である。補充油室１４には、補充油の油面の位置が目視可能な油面計１４ａが設けられる。この油面計１４ａは、ガラス、アクリルなどの透明度の高い材質からなり、廃油室１２に回収された廃油量が視認できる。油面計１４ａは、少なくとも、補充油室１４の補充油の油面が最も高いレベル、すなわち満油レベルを視認可能に設けられることが好適である。また、補充油室１４には、補充油の油面の位置を計測するフロート１４ｂが設けられる。このフロート１４ｂは、補充油室１４内の補充油の油面が最も低いレベル、すなわち減油レベルを計測する。   The replenishing oil chamber 14 is a pressure-resistant container such as a cylinder, like the waste oil chamber 12, and is a container that can withstand a predetermined positive pressure or negative pressure. The replenishing oil chamber 14 is provided with an oil level gauge 14a where the position of the oil level of the replenishing oil can be visually observed. The oil level gauge 14a is made of a highly transparent material such as glass or acrylic, and the amount of waste oil collected in the waste oil chamber 12 can be visually recognized. The oil level gauge 14a is preferably provided so that at least the oil level of the supplementary oil in the supplementary oil chamber 14 is at the highest level, that is, the full oil level is visible. The replenishing oil chamber 14 is provided with a float 14b for measuring the position of the oil surface of the replenishing oil. The float 14b measures the level at which the oil level of the supplementary oil in the supplementary oil chamber 14 is the lowest, that is, the oil reduction level.

補充油室１４には、これの底部に、圧縮機の低圧側（図示せず）に接続可能な低圧バルブ２４が接続される。低圧バルブ２４と補充油室１４との間の流路には、この流路を流れる補充油の状況が目視可能な油面計２６が設けられる。この油面計２６は、ガラス、アクリルなどの透明度の高い材質からなり、回収源に回収される廃油の状況が視認できる。低圧バルブ２４と圧縮機の低圧側とはホースを介して接続されるので、低圧バルブ２４の端部に、そのホースとの着脱が容易な接続用ポートが設けられることが好適である。   A low-pressure valve 24 that can be connected to the low-pressure side (not shown) of the compressor is connected to the replenishing oil chamber 14 at the bottom thereof. An oil level gauge 26 is provided in the flow path between the low pressure valve 24 and the refill oil chamber 14 so that the state of the refill oil flowing through the flow path can be visually observed. The oil level gauge 26 is made of a highly transparent material such as glass or acrylic, and the status of waste oil recovered in the recovery source can be visually confirmed. Since the low-pressure valve 24 and the low-pressure side of the compressor are connected via a hose, it is preferable that a connection port that can be easily attached to and detached from the hose is provided at the end of the low-pressure valve 24.

また、補充油室１４には、補充油の供給源（図示せず）に接続可能な供給バルブ２８が接続される。供給源は、密閉可能なタンクからなる補充油容器である。供給バルブ２８と供給源とはホースを介して接続されるので、供給バルブ２８の端部に、そのホースとの着脱が容易な接続用ポートが設けられることが好適である。また、供給バルブ２８と補充油室１４との間の流路は、図１に示されるように、低圧バルブ２４と補充油室１４との間の流路を共用することも可能である。この構成により、油面計２６も共用することができ、部品点数を削減することができる。なお、本発明はこの構成に限定されず、供給バルブ２８が単独の流路を介して補充油室１４に接続されてもよく、その接続領域は、補充油室１４の底部の限らず、さらに上方であってもよい。なお、本実施形態においては、補充油室１４に供給バルブ２８が接続される場合について説明したが、本発明はこの構成に限定されず、補充油室１４が供給源を兼ねるのであれば、供給バルブ２８を設けなくてもよい。   The replenishing oil chamber 14 is connected to a supply valve 28 that can be connected to a replenishing oil supply source (not shown). The supply source is a refilling oil container consisting of a sealable tank. Since the supply valve 28 and the supply source are connected via a hose, it is preferable that an end of the supply valve 28 is provided with a connection port that can be easily attached to and detached from the hose. Further, as shown in FIG. 1, the flow path between the supply valve 28 and the replenishing oil chamber 14 can share the flow path between the low pressure valve 24 and the replenishing oil chamber 14. With this configuration, the oil level gauge 26 can be shared, and the number of parts can be reduced. The present invention is not limited to this configuration, and the supply valve 28 may be connected to the refilling oil chamber 14 via a single flow path, and the connection region is not limited to the bottom of the refilling oil chamber 14, and It may be upward. In the present embodiment, the case where the supply valve 28 is connected to the replenishing oil chamber 14 has been described. However, the present invention is not limited to this configuration, and if the replenishing oil chamber 14 also serves as a supply source, supply is possible. The valve 28 may not be provided.

廃油室１２と補充油室１４とは、同じ形状であるとともに、これらの室１２，１４の底部が同一の水平面に位置するように設けられることが好適である。このように構成されることにより、油面計１２ａ，１４ａを介して、互いの室１２，１４の油面を目視するだけで、室１２，１４内の各油量を容易に比較することができる。   It is preferable that the waste oil chamber 12 and the replenishing oil chamber 14 have the same shape and are provided so that the bottoms of these chambers 12 and 14 are located on the same horizontal plane. By being configured in this way, it is possible to easily compare the amount of oil in the chambers 12 and 14 only by visually observing the oil levels in the chambers 12 and 14 via the oil level gauges 12a and 14a. it can.

連通管１６は、廃油室１２と補充油室１４の頂部にそれぞれ接続される。この構成により、廃油室１２が廃油を収容する容積と、補充油室１４が補充油を収容する容積とを、ともに最大限に確保することができる。このとき、廃油容量の確保のため、廃油室１２内のデミスタ２３が、廃油室１２の頂部付近に設けられることが好適である。   The communication pipe 16 is connected to the tops of the waste oil chamber 12 and the replenishment oil chamber 14, respectively. With this configuration, both the volume in which the waste oil chamber 12 accommodates waste oil and the volume in which the replenishment oil chamber 14 accommodates replenishment oil can be ensured to the maximum. At this time, it is preferable that the demister 23 in the waste oil chamber 12 is provided near the top of the waste oil chamber 12 in order to secure the waste oil capacity.

連通管１６には、この連通管１６を開閉可能な開閉バルブ３０と、この開閉バルブ３０より補充油室１４側に、この管内と補充油室１４内の圧力を計測する圧力計３２とが設けられる。なお、圧力計３２の位置は一例であって、補充油室１４内の圧力が計測可能であれば、その位置はどこでもよく、直接に補充油室１４に設けられてもよい。なお、本実施形態においては、開閉バルブ３０が連通管１６に設けられる場合について説明したが、本発明はこの構成に限定されず、廃油室１２と補充油室１４を仕切る必要がなければ、開閉バルブ３０を設けなくてもよい。   The communication pipe 16 is provided with an open / close valve 30 that can open and close the communication pipe 16, and a pressure gauge 32 that measures the pressure in the pipe and the supplementary oil chamber 14 on the side of the supplementary oil chamber 14 from the open / close valve 30. It is done. The position of the pressure gauge 32 is an example, and the position may be anywhere as long as the pressure in the replenishing oil chamber 14 can be measured, and may be provided directly in the replenishing oil chamber 14. In the present embodiment, the case where the opening / closing valve 30 is provided in the communication pipe 16 has been described. However, the present invention is not limited to this configuration, and if the waste oil chamber 12 and the supplementary oil chamber 14 do not need to be partitioned, the opening / closing valve 30 is opened / closed. The valve 30 may not be provided.

また、連通管１６には、開閉バルブ３０より補充油室１４側に、各室１２，１４内の気体を吸引する吸引源（図示せず）に接続可能な吸引バルブ３４が接続される。吸引源は、真空ポンプと冷媒回収装置である。吸引バルブ３４と吸引源とはホースを介して接続されるので、吸引バルブ３４の端部に、そのホースとの着脱が容易な接続用ポートが設けられることが好適である。なお、吸引バルブ３４の位置は一例であって、開閉バルブ３０より補充油室１４側であれば、その位置はどこでもよく、直接に補充油室１４に接続されてもよい。補充作業においては、後述のように、この吸引バルブ３４と圧縮機の高圧側とを接続することもできる。なお、本実施形態においては、吸引バルブ３４が設けられる場合について説明したが、本発明はこの構成に限定されず、補充油室１４が供給源と冷媒回収装置とを兼ねるのであれば、吸引バルブ３４を設けなくてもよい。   Further, a suction valve 34 that can be connected to a suction source (not shown) for sucking the gas in the chambers 12, 14 is connected to the communication pipe 16 on the replenishment oil chamber 14 side from the open / close valve 30. The suction source is a vacuum pump and a refrigerant recovery device. Since the suction valve 34 and the suction source are connected via a hose, it is preferable that a connection port that can be easily attached to and detached from the hose is provided at the end of the suction valve 34. The position of the suction valve 34 is an example, and the position may be anywhere as long as it is closer to the refilling oil chamber 14 than the opening / closing valve 30, and may be directly connected to the refilling oil chamber 14. In the replenishment operation, the suction valve 34 and the high pressure side of the compressor can be connected as will be described later. In the present embodiment, the case where the suction valve 34 is provided has been described. However, the present invention is not limited to this configuration. If the replenishment oil chamber 14 serves as both a supply source and a refrigerant recovery device, the suction valve 34 is provided. 34 may not be provided.

次に、このように構成される補充装置１０に用いた、油を補充する補充作業手順の一例について、図２，３を用いて説明する。図２は、冷凍空調機用油を補充する補充作業手順を示す表であり、図３は、図２のステップＣにおける状態を示す図である。なお、この補充作業手順においては、低圧バルブ２４が圧縮機の低圧側に接続され、供給バルブ２８が補充油容器に接続され、そして吸引バルブ３４が真空ポンプに接続された状態で、全てのバルブ１８，２０，２４，２８，３０，３４が全閉である状態をスタートの時点とする。そして、このときの廃油室１２と補充油室１４はともに空である。   Next, an example of a replenishment work procedure for replenishing oil used in the replenishing device 10 configured as described above will be described with reference to FIGS. FIG. 2 is a table showing a replenishment work procedure for replenishing oil for a refrigeration air conditioner, and FIG. 3 is a diagram showing a state in step C of FIG. In this refilling operation procedure, all the valves are connected with the low pressure valve 24 connected to the low pressure side of the compressor, the supply valve 28 connected to the refill oil container, and the suction valve 34 connected to the vacuum pump. A state in which 18, 20, 24, 28, 30, and 34 are fully closed is defined as a start time. At this time, the waste oil chamber 12 and the replenishment oil chamber 14 are both empty.

まず、ステップＡにおいて、吸引バルブ３４を開き、真空ポンプを動作させて、補充油室１４を真空引きする。そして、ステップＢで、供給バルブ２８を開き、補充油容器から補充油室１４へ補充油を供給する。このとき、真空ポンプの動作により、補充油室１４は減圧されているので、圧力差により、スムーズに補充油が供給される。そして、ステップＣで、油面計１４ａからの目視により、補充油が所定量供給されたことを確認する（例えば図３に示される状態）と、吸引バルブ３４と供給バルブ２８と閉じて、真空引きと補充油の供給を停止する。   First, in step A, the suction valve 34 is opened, the vacuum pump is operated, and the replenishment oil chamber 14 is evacuated. In step B, the supply valve 28 is opened to supply supplementary oil from the supplementary oil container to the supplementary oil chamber 14. At this time, since the replenishing oil chamber 14 is depressurized by the operation of the vacuum pump, the replenishing oil is smoothly supplied due to the pressure difference. In step C, when it is confirmed by visual inspection from the oil level gauge 14a that a predetermined amount of replenishment oil has been supplied (for example, the state shown in FIG. 3), the suction valve 34 and the supply valve 28 are closed, and the vacuum is applied. Stop pulling and refilling oil supply.

ステップＣからステップＤの間に、吸引バルブ３４と圧縮機の高圧側とを接続する。そして、ステップＤにおいて、吸引バルブ３４を開き、圧縮機の高圧側から供給される冷媒により補充油室１４が加圧される。そして、ステップＥで低圧バルブ２４を開く。そうすると、圧縮機の高圧側と同じ圧力まで加圧された補充室１４と、圧縮機の低圧側との圧力差により、補充油室１４の補充油が圧縮機の低圧側へ流れ、その低圧側に補充油を補充する。そして、フロート１４ｂの動作により、所定量の補充油が圧縮機に補充されたことを確認すると、ステップＦでは、吸引バルブ３４を閉じて、補充油室１４への加圧を停止し、ステップＧで、圧縮機への補充油の補充を停止する。   Between step C and step D, the suction valve 34 and the high pressure side of the compressor are connected. In step D, the suction valve 34 is opened, and the replenishment oil chamber 14 is pressurized by the refrigerant supplied from the high pressure side of the compressor. In step E, the low pressure valve 24 is opened. Then, due to the pressure difference between the replenishing chamber 14 pressurized to the same pressure as the high pressure side of the compressor and the low pressure side of the compressor, the replenishing oil in the replenishing oil chamber 14 flows to the low pressure side of the compressor. Refill with oil. When it is confirmed by the operation of the float 14b that a predetermined amount of replenishment oil has been replenished to the compressor, in step F, the suction valve 34 is closed to stop pressurization to the replenishment oil chamber 14, and step G Then, the replenishment of the replenishment oil to the compressor is stopped.

ステップＧからステップＨの間に、吸引バルブ３４と冷媒回収装置とを接続する。そして、ステップＨにおいて、吸引バルブ３４を開き、冷媒回収装置により補充油室１４内の冷媒を回収し、ステップＩにおいて、吸引バルブ３４を閉じ、冷媒回収を停止して、作業が終了する。   Between step G and step H, the suction valve 34 and the refrigerant recovery device are connected. In step H, the suction valve 34 is opened, and the refrigerant in the replenishing oil chamber 14 is collected by the refrigerant collection device. In step I, the suction valve 34 is closed, refrigerant collection is stopped, and the operation is completed.

このように、本実施形態の補充装置１０によれば、圧縮機の高圧側と吸引バルブ３４との着脱、および圧縮機の低圧側と低圧バルブ２４との着脱行為は、従来の補充作業と同様に１回のみで、冷凍空調機に油を補充することができる。   Thus, according to the replenishing device 10 of this embodiment, the attachment / detachment of the high pressure side of the compressor and the suction valve 34 and the attachment / detachment action of the low pressure side of the compressor and the low pressure valve 24 are the same as in the conventional replenishment operation. The refrigeration air conditioner can be refilled with oil only once.

次に、上述のように構成される補充装置１０に用いた、油を交換する交換作業手順の一例について、図４，５を用いて説明する。図４は、冷凍空調機用油を交換する交換作業手順を示す表であり、図５は、図４のステップＥにおける状態を示す図である。なお、この交換作業手順においては、高圧バルブ１８が圧縮機の高圧側に接続され、回収バルブ２０が廃油容器に接続され、低圧バルブ２４が圧縮機の低圧側に接続され、供給バルブ２８が補充油容器に接続され、そして吸引バルブ３４が真空ポンプに接続された状態で、全てのバルブ１８，２０，２４，２８，３０，３４が全閉である状態をスタートの時点とする。そして、このときの廃油室１２と補充油室１４はともに空である。   Next, an example of an exchange work procedure for exchanging oil used in the replenishing device 10 configured as described above will be described with reference to FIGS. FIG. 4 is a table showing a replacement work procedure for replacing the oil for the refrigeration air conditioner, and FIG. 5 is a diagram showing a state in step E of FIG. In this replacement procedure, the high pressure valve 18 is connected to the high pressure side of the compressor, the recovery valve 20 is connected to the waste oil container, the low pressure valve 24 is connected to the low pressure side of the compressor, and the supply valve 28 is replenished. A state in which all the valves 18, 20, 24, 28, 30, and 34 are fully closed with the suction valve 34 connected to the vacuum pump and the suction valve 34 connected to the vacuum pump is set as the start point. At this time, the waste oil chamber 12 and the replenishment oil chamber 14 are both empty.

まず、ステップＡにおいて、開閉バルブ３０と吸引バルブ３４を開き、真空ポンプを動作させて、廃油室１２と補充油室１４を真空引きする。そして、ステップＢで、供給バルブ２８を開き、補充油容器から補充油室１４へ補充油を供給する。このとき、真空ポンプの動作により、補充油室１４などは減圧されているので、圧力差により、スムーズに補充油が補充油室１４に供給される。そして、ステップＣで、油面計１４ａからの目視により、補充油が所定量供給されたことを確認すると、吸引バルブ３４と供給バルブ２８と閉じて、真空引きと補充油の供給を停止する。このステップＣの後、後述するステップＪまでの間に、吸引バルブ３４と冷媒回収装置とを接続する。   First, in step A, the open / close valve 30 and the suction valve 34 are opened, and the vacuum pump is operated to evacuate the waste oil chamber 12 and the replenishment oil chamber 14. In step B, the supply valve 28 is opened to supply supplementary oil from the supplementary oil container to the supplementary oil chamber 14. At this time, since the replenishing oil chamber 14 and the like are depressurized by the operation of the vacuum pump, the replenishing oil is smoothly supplied to the replenishing oil chamber 14 due to the pressure difference. In Step C, when it is confirmed by visual inspection from the oil level gauge 14a that a predetermined amount of replenishment oil has been supplied, the suction valve 34 and the supply valve 28 are closed, and the vacuuming and replenishment oil supply are stopped. The suction valve 34 and the refrigerant recovery device are connected after Step C and before Step J described later.

ステップＤにおいて、低圧バルブ２４を開き、圧縮機の低圧側から供給される冷媒により廃油室１２と補充油室１４を加圧する。そして、ステップＥでは、高圧バルブ１８を開き、圧縮機の高圧側から廃油室１２に廃油が供給されるとともに、圧縮機の高圧側から廃油室１２に供給される冷媒により廃油室１２が加圧される。さらに、その冷媒により、連通管１６を介して、補充油室１４も加圧される。そうすると、圧縮機の高圧側と同じ圧力まで加圧された補充室１４と、圧縮機の低圧側との圧力差により、補充油室１４の補充油が圧縮機の低圧側へ流れ、その低圧側に補充油を補充する（例えば図５に示される状態）。   In Step D, the low pressure valve 24 is opened, and the waste oil chamber 12 and the replenishment oil chamber 14 are pressurized with the refrigerant supplied from the low pressure side of the compressor. In step E, the high-pressure valve 18 is opened, waste oil is supplied from the high pressure side of the compressor to the waste oil chamber 12, and the waste oil chamber 12 is pressurized by the refrigerant supplied to the waste oil chamber 12 from the high pressure side of the compressor. Is done. Further, the replenishment oil chamber 14 is also pressurized by the refrigerant through the communication pipe 16. Then, due to the pressure difference between the replenishing chamber 14 pressurized to the same pressure as the high pressure side of the compressor and the low pressure side of the compressor, the replenishing oil in the replenishing oil chamber 14 flows to the low pressure side of the compressor. The replenishment oil is replenished (for example, the state shown in FIG. 5).

そして、油面計１２ａからの目視により、廃油が所定量回収されたことを確認すると、ステップＦでは、高圧バルブ１８と吸引バルブ３４を閉じて、圧縮機からの廃油の回収を停止するとともに、補充油室１４への加圧も停止するので、補充油室１４の圧力を低下させる。そして、ステップＧで、低圧バルブ２４を閉じ、圧縮機への補充油の補充を停止する。回収される廃油の所定量は、通常、ステップＣにおける補充油の所定量と同等であるので、これらの所定量は、油面計１２ａ，１４ａから視認される油面により容易に確認できる。   Then, when it is confirmed by visual inspection from the oil level gauge 12a that a predetermined amount of waste oil has been recovered, in Step F, the high pressure valve 18 and the suction valve 34 are closed to stop the recovery of waste oil from the compressor, Since pressurization to the replenishing oil chamber 14 is also stopped, the pressure in the replenishing oil chamber 14 is reduced. In step G, the low-pressure valve 24 is closed, and the replenishment of replenishment oil to the compressor is stopped. Since the predetermined amount of recovered waste oil is usually equal to the predetermined amount of replenishment oil in Step C, these predetermined amounts can be easily confirmed by the oil level visually recognized from the oil level gauges 12a and 14a.

そして、ステップＨにおいて、回収バルブ２０を開き、廃油容器に、廃油室１２の廃油を回収する。そして、ステップＩで、油面計２２からの目視により、廃油が流路を流れていないことを確認すると、回収バルブ２０を閉じて、廃油回収を停止する。   In Step H, the recovery valve 20 is opened, and the waste oil in the waste oil chamber 12 is recovered in a waste oil container. In step I, when it is confirmed by visual inspection from the oil level gauge 22 that the waste oil does not flow through the flow path, the recovery valve 20 is closed and the recovery of the waste oil is stopped.

そして、ステップＪにおいて、吸引バルブ３４を開き、冷媒回収装置により廃油室１２と補充油室１４内の冷媒を回収し、ステップＫにおいて、開閉バルブ３０と吸引バルブ３４を閉じ、冷媒回収を停止して、作業が終了する。   In step J, the suction valve 34 is opened, and the refrigerant in the waste oil chamber 12 and the replenishment oil chamber 14 is collected by the refrigerant collection device. In step K, the opening / closing valve 30 and the suction valve 34 are closed, and refrigerant collection is stopped. The work is finished.

このように、本実施形態の補充装置１０によれば、圧縮機の高圧側と高圧バルブ１８との着脱、および圧縮機の低圧側と低圧バルブ２４との着脱行為は、補充作業と同様に単に１回のみで、冷凍空調機に油を交換することができる。   Thus, according to the replenishing device 10 of the present embodiment, the attachment / detachment between the high-pressure side of the compressor and the high-pressure valve 18 and the attachment / detachment action between the low-pressure side of the compressor and the low-pressure valve 24 are simply performed as in the replenishment operation. Oil can be exchanged into the refrigeration air conditioner only once.

１０ 冷凍空調機用油の補充装置、１２ 廃油室、１４ 補充油室、１６ 連通管、１８ 高圧バルブ、２０ 回収バルブ、２２，２６ 油面計、２３ デミスタ、２４ 低圧バルブ、２８ 供給バルブ、３０ 開閉バルブ、３２ 圧力計、３４ 吸引バルブ。   10 Refrigerating Air Conditioner Oil Replenisher, 12 Waste Oil Chamber, 14 Replenished Oil Chamber, 16 Communication Pipe, 18 High Pressure Valve, 20 Recovery Valve, 22, 26 Oil Level Meter, 23 Demister, 24 Low Pressure Valve, 28 Supply Valve, 30 Open / close valve, 32 pressure gauge, 34 suction valve.

Claims (9)

スクリュー型圧縮機を含む冷凍空調機から回収する廃油を収容する廃油室と、
廃油室と連通管を介して連通し、冷凍空調機へ補充する補充油を収容する補充油室と、
廃油室の上方領域に接続されるとともに、前記圧縮機の高圧側に接続可能な高圧バルブと、
補充油室の底部に接続されるとともに、前記圧縮機の低圧側に接続可能な低圧バルブと、
を有し、
連通管は、廃油室と補充油室の頂部にそれぞれ接続される、
ことを特徴とする冷凍空調機用油の補充装置。 A waste oil chamber for storing waste oil recovered from a refrigeration air conditioner including a screw compressor;
A replenishment oil chamber that communicates with the waste oil chamber via a communication pipe and contains replenishment oil to be replenished to the refrigeration air conditioner;
A high pressure valve connected to the upper region of the waste oil chamber and connectable to the high pressure side of the compressor;
A low pressure valve connected to the bottom of the refilling oil chamber and connectable to the low pressure side of the compressor;
Have
The communication pipes are connected to the tops of the waste oil chamber and the supplementary oil chamber,
An oil replenishing device for a refrigeration air conditioner. 請求項１に記載の冷凍空調機用油の補充装置において、
高圧バルブに接続する廃油室の空間と、連通管に接続する廃油室の空間とを隔てるように設けられ、補充油室側への廃油の通過を防止するデミスタを有する、
ことを特徴とする冷凍空調機用油の補充装置。 In the refrigerating apparatus for refrigerating and air-conditioning equipment according to claim 1,
A waste oil chamber connected to the high pressure valve and a waste oil chamber connected to the communication pipe are provided to separate the space, and has a demister that prevents the waste oil from passing to the replenishment oil chamber.
An oil replenishing device for a refrigeration air conditioner. 請求項１または２に記載の冷凍空調機用油の補充装置において、
補充油室に接続されるとともに、補充油の供給源に接続可能な供給バルブを有する、
ことを特徴とする冷凍空調機用油の補充装置。 In the replenishment apparatus of the oil for refrigeration air conditioners of Claim 1 or 2,
Having a supply valve connected to the replenishing oil chamber and connectable to a replenishing oil supply source;
An oil replenishing device for a refrigeration air conditioner. 請求項１から３のいずれか１つに記載の冷凍空調機用油の補充装置において、
補充油室の頂部または連通管のいずれかに接続されるとともに、各室内の気体を吸引する吸引源に接続可能な吸引バルブを有する、
ことを特徴とする冷凍空調機用油の補充装置。 In the replenishment apparatus of the oil for refrigeration air conditioners as described in any one of Claim 1 to 3,
It has a suction valve that can be connected to either the top of the refilling oil chamber or the communication pipe and can be connected to a suction source that sucks the gas in each chamber.
An oil replenishing device for a refrigeration air conditioner. 請求項４に記載の冷凍空調機用油の補充装置において、
吸引バルブとの接続部より廃油室側の連通管には、この連通管を開閉可能な開閉バルブが設けられる、
ことを特徴とする冷凍空調機用油の補充装置。 In the refrigerating apparatus for refrigerating and air-conditioning equipment according to claim 4,
The communication pipe on the waste oil chamber side from the connection with the suction valve is provided with an open / close valve that can open and close the communication pipe.
An oil replenishing device for a refrigeration air conditioner. 請求項５に記載の冷凍空調機用油の補充装置において、
連通管における開閉バルブより補充油室側に、圧力計が設けられる、
ことを特徴とする冷凍空調機用油の補充装置。 In the refrigerating machine oil replenishing device according to claim 5,
A pressure gauge is provided on the replenishing oil chamber side from the open / close valve in the communication pipe.
An oil replenishing device for a refrigeration air conditioner. 請求項１から６のいずれか１つに記載の冷凍空調機用油の補充装置において、
廃油室の底部に接続されるとともに、廃油室の廃油を回収する回収源に接続可能な回収バルブを有する、
ことを特徴とする冷凍空調機用油の補充装置。 In the replenishment apparatus of the oil for refrigeration air conditioners as described in any one of Claim 1 to 6,
A recovery valve connected to the bottom of the waste oil chamber and connectable to a recovery source for recovering waste oil in the waste oil chamber;
An oil replenishing device for a refrigeration air conditioner. 請求項１から７のいずれか１つに記載の冷凍空調機用油の補充装置において、
廃油室と補充油室とは同じ形状であるとともに、これらの室の底部が同一の水平面に位置するように設けられ、
廃油室と補充油室に油面計が設けられる、
ことを特徴とする冷凍空調機用油の補充装置。 In the replenishment apparatus of the oil for refrigeration air conditioners as described in any one of Claim 1 to 7,
The waste oil chamber and the replenishing oil chamber have the same shape, and the bottoms of these chambers are provided on the same horizontal plane,
Oil level gauges are provided in the waste oil chamber and the supplementary oil chamber.
An oil replenishing device for a refrigeration air conditioner. 請求項１から８のいずれか１つに記載の冷凍空調機用油の補充装置において、
補充油室には、油面の位置を計測するフロートが設けられる、
ことを特徴とする冷凍空調機用油の補充装置。 In the replenishment apparatus of the oil for refrigeration air conditioners as described in any one of Claim 1 to 8,
The replenishing oil chamber is provided with a float for measuring the position of the oil level.
An oil replenishing device for a refrigeration air conditioner.
JP2011049883A 2011-03-08 2011-03-08 Oil replenishment device for refrigeration air conditioners Active JP5492359B2 (en)

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JPS5457253A (en) * 1977-10-14 1979-05-08 Nippon Denso Co Ltd Method of filling refrigerent in refrigerator
JPS5718482A (en) * 1979-10-31 1982-01-30 Isarutaareru Shiyuraubenkomupu Suction regulator for compressor
JPH04369365A (en) * 1991-06-14 1992-12-22 Nippondenso Co Ltd Refrigerant recovering regenerator
JP2002080098A (en) * 2000-09-08 2002-03-19 Shibata Sangyo Kk Aspirator, injector and oil exchanger provided with those devices.
JP2002277110A (en) * 2001-03-19 2002-09-25 Mitsubishi Electric Corp Freezer/air conditioner and its operating method
JP2004125309A (en) * 2002-10-03 2004-04-22 Mitsubishi Electric Corp Oil replacing device for refrigerating cycle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5457253A (en) * 1977-10-14 1979-05-08 Nippon Denso Co Ltd Method of filling refrigerent in refrigerator
JPS5718482A (en) * 1979-10-31 1982-01-30 Isarutaareru Shiyuraubenkomupu Suction regulator for compressor
JPH04369365A (en) * 1991-06-14 1992-12-22 Nippondenso Co Ltd Refrigerant recovering regenerator
JP2002080098A (en) * 2000-09-08 2002-03-19 Shibata Sangyo Kk Aspirator, injector and oil exchanger provided with those devices.
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