JP2014211267A - Refrigerant collector-filler and washing method therefor - Google Patents

Refrigerant collector-filler and washing method therefor Download PDF

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JP2014211267A
JP2014211267A JP2013087728A JP2013087728A JP2014211267A JP 2014211267 A JP2014211267 A JP 2014211267A JP 2013087728 A JP2013087728 A JP 2013087728A JP 2013087728 A JP2013087728 A JP 2013087728A JP 2014211267 A JP2014211267 A JP 2014211267A
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refrigerant
filling
recovery
cleaning
purified
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貞夫 樋上
Sadao Higami
貞夫 樋上
憲二 山嵜
Kenji Yamazaki
憲二 山嵜
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Dengen Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B45/00Arrangements for charging or discharging refrigerant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass

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  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
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  • General Engineering & Computer Science (AREA)
  • Cleaning In General (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerant collector-filler capable of exhibiting a higher washing capability if different refrigerator oil is mixed in the pipe of a refrigerant collector and a washing method therefor.SOLUTION: A refrigerant collector/filler comprises: collecting and filling means capable of collecting and filling a plurality of types of refrigerants in which refrigerator oil is mixed; duct washing means; and a vacuum pump. The washing means includes: a purified refrigerant supply vessel; and a washing refrigerant supply pipe selectively connected to the purified refrigerant supply vessel. The collecting and filling means comprises a plurality of high-pressure-side and low-pressure-side connectors, the connectors of the washing refrigerant supply pipe are selectable, and a duct for directly injecting the refrigerant to a collection vessel from the purified refrigerant supply vessel by way of a duct in a collection-filling vessel via the selected connectors is formed.

Description

本発明は、主として車両用空調システムの冷媒回収充填装置、及び当該装置の洗浄方法に関するものである。   The present invention mainly relates to a refrigerant recovery and filling device for a vehicle air conditioning system and a cleaning method for the device.

近年の車両用空調システム(カーエアコン)の冷媒は、通常HFC(ハイドロフルオロカーボン)−134aが使用される。また、通常この冷媒には、機器や配管等の潤滑性を確保するために冷凍機油が添加される。   In recent years, HFC (hydrofluorocarbon) -134a is used as a refrigerant for a vehicle air conditioning system (car air conditioner). In addition, refrigerating machine oil is usually added to this refrigerant in order to ensure lubricity of equipment and piping.

冷凍機油が添加される前記冷媒は、車両が有するコンプレッサを用いて車両内の空調に使用されるが、前記冷媒に添加される冷凍機油は、車両の有するコンプレッサの種類によって異なるものが使用される。   The refrigerant to which the refrigerating machine oil is added is used for air conditioning in the vehicle using a compressor that the vehicle has, but the refrigerating machine oil to be added to the refrigerant is different depending on the type of compressor that the vehicle has. .

エンジン駆動軸からベルトを介して動力を得る従来型のコンプレッサ(以下、「ベルト駆動コンプレッサ」という。)を用いるガソリン車等の車両(以下、「ベルト駆動コンプレッサ搭載車」という。)にはPAG(ポリアルキレングリコール)油が用いられ、ベルト駆動コンプレッサを使用せず電動コンプレッサを用いる電気自動車やハイブリッド車等の車両(以下、「電動コンプレッサ搭載車」という。)には電気絶縁性の高いPOE(ポリオールエステル)油が用いられる。   A PAG (hereinafter referred to as a “belt-driven compressor-equipped vehicle”) using a conventional compressor (hereinafter referred to as “belt-driven compressor”) that obtains power from an engine drive shaft via a belt is used as a PAG ( (Polyalkylene glycol) oil is used, and POE (polyol) having high electrical insulation is used for vehicles such as electric vehicles and hybrid vehicles (hereinafter referred to as “electric compressor-equipped vehicles”) that use an electric compressor without using a belt-driven compressor. Ester) oil is used.

このような状況下において車両用空調システムは、冷媒の劣化を解消するために、冷媒回収充填装置により再生・交換作業が行われる。車両が上記いずれのコンプレッサを用いるかによって、添加される冷凍機油は異なるため、冷媒回収充填装置においても一致させて使用する必要がある。   Under such circumstances, the vehicle air conditioning system is regenerated / replaced by the refrigerant recovery and charging device in order to eliminate the deterioration of the refrigerant. Since the refrigeration oil to be added differs depending on which of the above compressors is used by the vehicle, it is necessary to use the same in the refrigerant recovery and charging apparatus.

しかしながら、人為的なミス等により、車両に異なる冷凍機油が添加されることがある。
PAG油が電動コンプレッサ搭載車に混入されると、電気絶縁性が高くないため、電動コンプレッサが絶縁不良を起こす虞がある。従って、冷媒回収充填装置には、上記人為的なミス等によるPAG油の混入に対する何らかの手段が求められる。
However, different refrigeration oils may be added to the vehicle due to human error.
When PAG oil is mixed in a vehicle equipped with an electric compressor, the electric insulation is not high, and the electric compressor may cause an insulation failure. Therefore, the refrigerant recovery and filling device is required to have some means for mixing PAG oil due to the above-mentioned human error.

このような観点から、近年においては、いずれの冷凍機油が添加された冷媒でも回収充填が可能で、配管の冷凍機油を洗浄する手段を備える冷媒回収充填装置が開発されている。   From such a point of view, in recent years, a refrigerant recovery and filling apparatus has been developed that can be recovered and filled with any refrigerant added to the refrigerating machine oil and has means for washing the refrigerating machine oil in the pipe.

当該冷媒回収充填装置の一例として、車両用空調システムの高圧サービスバルブ及び低圧サービスバルブに着脱される高圧ホース及び低圧ホースと、車両用空調システムから冷媒を回収するコンプレッサと、回収した冷媒から冷凍機油を分離するオイルセパレータと、分離した冷媒を貯蔵する冷媒回収タンクと、前記高圧ホース及び低圧ホースが接続されるバルブとを備え、前記高圧ホース及び低圧ホースを装置本体側のバルブに接続し、前記コンプレッサの駆動により前記オイルセパレータと冷媒回収タンクとの間を循環する閉経路を形成し、該閉経路に冷媒を循環させて管路中に残留する冷凍機油を除去する管路洗浄を実行可能にした冷媒回収充填装置が公知である(例えば、特許文献1参照。)。   As an example of the refrigerant recovery and charging device, a high-pressure hose and a low-pressure hose attached to and detached from a high-pressure service valve and a low-pressure service valve of a vehicle air conditioning system, a compressor that recovers refrigerant from the vehicle air-conditioning system, and refrigeration oil from the recovered refrigerant An oil separator for separating the refrigerant, a refrigerant recovery tank for storing the separated refrigerant, and a valve to which the high pressure hose and the low pressure hose are connected, and the high pressure hose and the low pressure hose are connected to a valve on the apparatus body side, A closed path that circulates between the oil separator and the refrigerant recovery tank is formed by driving the compressor, and the pipe cleaning that removes the refrigeration oil remaining in the pipe by circulating the refrigerant in the closed path can be performed. The refrigerant | coolant collection | recovery filling device which was made is well-known (for example, refer patent document 1).

特開2012−117719号公報JP 2012-117719 A

上記特許文献1に係る冷媒回収充填装置によれば、いずれの冷凍機油が添加された冷媒でも回収充填が可能であり、当該冷媒回収充填装置は循環式の洗浄工程を有することにより、一定の洗浄効果を得ることが出来ると考えられる。   According to the refrigerant recovery and filling apparatus according to Patent Document 1, any refrigerant to which any refrigerating machine oil is added can be recovered and filled, and the refrigerant recovery and filling apparatus has a circulation cleaning step, thereby providing a constant cleaning. It is thought that an effect can be acquired.

しかしながら、冷媒回収タンクの冷媒を使用してこれを循環させるため、循環中には冷媒に冷凍機油が混合されるため、異なるオイルが付着していない箇所を含め洗浄のための冷凍機油を含んだ冷媒が繰り返し循環されることになる。このため、より洗浄能力の高い冷媒回収充填装置が求められている。   However, since the refrigerant in the refrigerant recovery tank is circulated using the refrigerant, since the refrigeration oil is mixed with the refrigerant during the circulation, the refrigeration oil for cleaning is included, including places where different oils are not attached. The refrigerant is circulated repeatedly. For this reason, there is a need for a refrigerant recovery and filling device with higher cleaning ability.

本発明は以上の事情に鑑みてなされたものであり、人為的なミス等により、冷媒回収装置の配管に異なる冷凍機油が混入された場合に、従来の冷媒回収充填装置よりも高い洗浄能力を発揮できる冷媒回収充填装置、及び洗浄方法を提供することを、発明が解決しようとする課題とする。   The present invention has been made in view of the above circumstances, and when a different refrigeration oil is mixed into the piping of the refrigerant recovery apparatus due to human error or the like, it has a higher cleaning ability than the conventional refrigerant recovery and filling apparatus. An object of the present invention is to provide a refrigerant recovery and filling device and a cleaning method that can be exhibited.

本発明は、冷凍機油が混合される複数種類の冷媒を回収充填可能とする回収充填手段と、管路の洗浄手段とを備える冷媒回収充填装置において、前記洗浄手段は、精製冷媒を貯留するための精製冷媒供給容器と、該精製冷媒供給容器に接続される洗浄用冷媒供給管を備え、回収充填手段は、前記複数種類の冷媒に対応した複数の接続部とコンプレッサを備え、前記洗浄用冷媒供給管と前記いずれかの接続部を接続して、前記洗浄手段から冷媒回収充填経路を通じて回収容器内へ冷媒を直接流入させる管路を備えたことを特徴とする冷媒回収充填装置を、課題を解決するための手段とする。ここで、精製冷媒とは、冷媒回収充填装置にて再生された冷媒を含まない、未使用の冷媒であり、冷凍機油を含有しない冷媒をいう。   The present invention provides a refrigerant recovery and filling apparatus including a recovery and filling unit that can recover and charge a plurality of types of refrigerant mixed with refrigerating machine oil, and a pipe cleaning unit, the cleaning unit storing purified refrigerant A purified refrigerant supply container and a cleaning refrigerant supply pipe connected to the purified refrigerant supply container, and the recovery and filling means includes a plurality of connection portions and compressors corresponding to the plurality of types of refrigerant, and the cleaning refrigerant. A refrigerant recovery and filling apparatus comprising: a pipe that connects a supply pipe and any one of the connection portions and directly flows a refrigerant from the cleaning means into a recovery container through a refrigerant recovery and charging path. Means for solving this problem. Here, the refined refrigerant is an unused refrigerant that does not include the refrigerant regenerated by the refrigerant recovery and filling device, and that does not contain refrigerating machine oil.

また本発明は、上記構成を前提として、前記精製冷媒供給管に逆止弁を設けたことを特徴とする冷媒回収充填装置を、課題を解決するための手段とする。   In addition, the present invention is based on the above-described configuration, and a refrigerant recovery / filling device characterized in that a check valve is provided in the purified refrigerant supply pipe is a means for solving the problems.

また本発明は、冷凍機油が混合される複数種類の冷媒を回収充填可能とする回収充填手段と、管路の洗浄手段とを備える冷媒回収充填装置の洗浄方法において、前記洗浄手段は、精製冷媒を貯留するための精製冷媒供給容器と、該精製冷媒供給容器に接続される洗浄用冷媒供給管を備え、回収充填手段は、前記複数種類の冷媒に対応した複数の接続部とコンプレッサを備え、前記洗浄用冷媒供給管と前記いずれかの接続部を接続して、前記コンプレッサで冷媒を吸引し、前記精製冷媒供給容器から選択された前記接続部を介して回収充填容器内の管路を経由し、冷媒を回収容器へ直接流入させることを特徴とする冷媒回収充填装置の洗浄方法を、課題を解決するための手段とする。   Further, the present invention provides a cleaning method for a refrigerant recovery and filling apparatus, comprising: a recovery and filling means capable of recovering and filling a plurality of types of refrigerant mixed with refrigerating machine oil; and a pipe cleaning means. And a cleaning refrigerant supply pipe connected to the purified refrigerant supply container. The cleaning refrigerant supply pipe and any one of the connecting portions are connected, the refrigerant is sucked by the compressor, and passes through a pipe line in the collection and filling container through the connecting portion selected from the purified refrigerant supply container. Then, the cleaning method of the refrigerant recovery and filling apparatus, which is characterized by causing the refrigerant to flow directly into the recovery container, is a means for solving the problem.

また上記冷媒回収充填装置の洗浄方法を前提として、真空ポンプによる真空引き後に精製冷媒供給容器からの精製冷媒の投入を、複数回実行する工程を有することを特徴とする冷媒回収充填装置の洗浄方法を、課題を解決するための手段とする。ここで精製冷媒の複数回の投入は、同一又は異なる精製冷媒供給容器のいずれからの投入をも含む趣旨である。   Further, on the premise of the cleaning method for the refrigerant recovery and filling apparatus, the method for cleaning the refrigerant recovery and filling apparatus includes a step of performing a plurality of times of charging the purified refrigerant from the purified refrigerant supply container after evacuation by a vacuum pump Is a means for solving the problem. Here, the introduction of the purified refrigerant a plurality of times includes introduction from either the same or different purified refrigerant supply containers.

請求項1に係る発明によれば、冷凍機油が混合される複数種類の冷媒を回収充填可能とする回収充填手段と、管路の洗浄手段と、真空ポンプを備える冷媒回収充填装置において、
前記洗浄手段は、精製冷媒を貯留するための精製冷媒供給容器と、該精製冷媒供給容器に接続される洗浄用冷媒供給管とを備え、回収充填手段は、前記複数種類の冷媒に対応した複数の接続部とコンプレッサを備え、前記洗浄用冷媒供給管と前記いずれかの接続部を接続して、前記洗浄手段から冷媒回収充填経路を通じて回収容器内へ冷媒を直接流入させる管路を備えたことから、精製冷媒を循環させることなく管路内を流入させて洗浄を行うことで、精製冷媒に溶解する冷凍機油を常に飽和溶解量に達するまで、速やかに高濃度で溶解させることができるので、効率的に優れた洗浄効果を得ることができる。
According to the first aspect of the present invention, in the refrigerant recovery and filling device including the recovery and filling means capable of recovering and filling a plurality of types of refrigerant mixed with the refrigerating machine oil, the conduit cleaning means, and the vacuum pump,
The cleaning means includes a purified refrigerant supply container for storing the purified refrigerant, and a cleaning refrigerant supply pipe connected to the purified refrigerant supply container, and the recovery and filling means includes a plurality of types corresponding to the plurality of types of refrigerants. And a pipe for connecting the cleaning refrigerant supply pipe and any one of the connecting parts and allowing the refrigerant to directly flow into the recovery container through the refrigerant recovery / filling path. From the above, by washing in the pipeline without circulating the purified refrigerant, the refrigeration oil that dissolves in the purified refrigerant can be quickly dissolved at a high concentration until the saturated dissolution amount is reached. An excellent cleaning effect can be obtained efficiently.

また、上記発明の構成を前提として、前記精製冷媒供給管に逆止弁を設けたことにより、不慮の事故等によって精製冷媒供給容器が冷凍機油に汚染されることがなく、上記発明の作用効果を安定して発揮させることができる。   In addition, on the premise of the configuration of the above invention, by providing a check valve in the purified refrigerant supply pipe, the purified refrigerant supply container is not contaminated by refrigerating machine oil due to an accident, etc. Can be exhibited stably.

また、本発明によれば、冷凍機油が混合される複数種類の冷媒を回収充填可能とする回収充填手段と、管路の洗浄手段と、真空ポンプを備える冷媒回収充填装置の洗浄方法において、前記洗浄手段は、精製冷媒を貯留するための精製冷媒供給容器と、該精製冷媒供給容器に接続される洗浄用冷媒供給管を備え、回収充填手段は、前記複数種類の冷媒に対応した複数の接続部とコンプレッサを備え、前記洗浄用冷媒供給管と前記いずれかの接続部を接続して、真空ポンプで真空引きを行った後、前記精製冷媒供給容器から選択された前記接続部を介して回収充填容器内の管路を経由し、冷媒を回収容器へ直接流入させることによって、精製冷媒に溶解する冷凍機油を常に飽和溶解量に達するまで、速やかに高濃度で溶解させることができるので、効率的に優れた洗浄効果を得ることができる。   Further, according to the present invention, in the cleaning method for the refrigerant recovery and filling apparatus including the recovery and filling means capable of recovering and filling a plurality of types of refrigerant mixed with the refrigerating machine oil, the pipe cleaning means, and the vacuum pump, The cleaning means includes a purified refrigerant supply container for storing the purified refrigerant and a cleaning refrigerant supply pipe connected to the purified refrigerant supply container, and the recovery and filling means has a plurality of connections corresponding to the plurality of types of refrigerants. And a compressor, and the cleaning refrigerant supply pipe and any one of the connecting portions are connected to each other, vacuumed by a vacuum pump, and then recovered from the purified refrigerant supply container via the connecting portion. By allowing the refrigerant to flow directly into the recovery container via the pipe line in the filling container, the refrigeration oil that dissolves in the purified refrigerant can be quickly dissolved at a high concentration until the saturated dissolution amount is reached. It can be obtained efficiently excellent cleaning effect.

また、上記冷媒回収充填装置の洗浄方法を前提として、冷媒回収充填装置の管路に真空ポンプを備え、該真空ポンプによる真空引き後に精製冷媒供給容器からの精製冷媒の投入を、複数回実行する工程を有することとしたから、精製冷媒に溶解する冷凍機油を常に飽和溶解量に達するまで、速やかに高濃度で溶解させることを、繰り返し行うことにより、更に優れた洗浄効果を得ることができる。   Further, on the premise of the cleaning method of the refrigerant recovery and filling apparatus, a vacuum pump is provided in the pipe of the refrigerant recovery and filling apparatus, and after the evacuation by the vacuum pump, the supply of the purified refrigerant from the purified refrigerant supply container is executed a plurality of times. Since it has the process, the refrigerating machine oil that dissolves in the refined refrigerant is dissolved at a high concentration quickly until it always reaches the saturated dissolution amount, whereby a further excellent cleaning effect can be obtained.

本発明の実施例に係る冷媒回収充填装置における回収充填時の構成を示す一部省略した説明図である。It is explanatory drawing which abbreviate | omitted partially showing the structure at the time of the collection | recovery filling in the refrigerant | coolant collection | recovery filling apparatus which concerns on the Example of this invention. 本発明の実施例に係る冷媒回収充填装置における洗浄工程中の真空引き動作時の構成を示す一部省略した説明図である。It is explanatory drawing partly abbreviate | omitted which shows the structure at the time of the evacuation operation | movement in the washing | cleaning process in the refrigerant | coolant collection | recovery filling apparatus which concerns on the Example of this invention. 本発明の実施例に係る冷媒回収充填装置における洗浄工程中の洗浄動作時の構成を示す一部省略した説明図である。It is explanatory drawing partially abbreviate | omitted which shows the structure at the time of the washing | cleaning operation | movement in the washing | cleaning process in the refrigerant | coolant collection | recovery and filling apparatus which concerns on the Example of this invention.

本発明は、冷凍機油が混合される複数種類の冷媒を回収充填可能とする回収充填手段と、管路の洗浄手段とを備える冷媒回収充填装置において、前記洗浄手段は、精製冷媒を貯留するための精製冷媒供給容器と、該精製冷媒供給容器に接続される洗浄用冷媒供給管を備え、回収充填手段は、前記複数種類の冷媒に対応した複数の高圧側及び低圧側の接続部を備え、前記洗浄用冷媒供給管は前記接続部のいずれかに選択的に接続可能とし、前記精製冷媒供給容器から選択された接続部を介して回収充填経路内の管路を経由し、冷媒を回収容器へ直接流入させる管路を形成したことから、精製冷媒を循環させることなく管路内を複数回流入させて洗浄を行うことで、精製冷媒に溶解する冷凍機油を常に飽和溶解量に達するまで、速やかに高濃度で溶解させることができ、更に前記精製冷媒供給管に逆止弁を設けたことにより、誤操作や不慮の事故等によって精製冷媒供給容器が冷凍機油に汚染されることもなく、効率的に優れた洗浄効果を安定的に発揮させる洗浄機能を備えた冷媒回収充填装置を実現した。   The present invention provides a refrigerant recovery and filling apparatus including a recovery and filling unit that can recover and charge a plurality of types of refrigerant mixed with refrigerating machine oil, and a pipe cleaning unit, the cleaning unit storing purified refrigerant A purified refrigerant supply container and a cleaning refrigerant supply pipe connected to the purified refrigerant supply container, and the recovery and filling means includes a plurality of high-pressure side and low-pressure side connection parts corresponding to the plurality of types of refrigerant, The cleaning refrigerant supply pipe can be selectively connected to any one of the connecting parts, and the refrigerant is collected in the collecting container via the pipe line in the collecting and filling path through the connecting part selected from the purified refrigerant supply container. Since the pipe line that directly flows into the pipe is formed, by washing the pipe line multiple times without circulating the purified refrigerant, until the refrigeration oil that dissolves in the purified refrigerant always reaches the saturation dissolution amount, Promptly at high concentrations Furthermore, by providing a check valve in the purified refrigerant supply pipe, the purified refrigerant supply container is not contaminated by refrigerating machine oil due to erroneous operation or accident, etc. Realized a refrigerant recovery and filling device with a cleaning function to stably exert the effect.

本実施例に係る冷媒回収充填装置は、自動冷媒回収充填装置であり、装置の有するCPUが所定の回収充填用プログラム若しくは洗浄用プログラムを実行することにより、冷媒の回収充填若しくは洗浄を自動的に行うものである。通常状態においては、冷媒の回収、冷媒の再生、真空引き、車両に対する冷媒の充填の順で工程を行い、必要に応じて洗浄を行うものとしている。   The refrigerant recovery / filling apparatus according to the present embodiment is an automatic refrigerant recovery / filling apparatus, and the CPU of the apparatus executes a predetermined recovery / filling program or cleaning program, thereby automatically collecting and filling or cleaning the refrigerant. Is what you do. In the normal state, the process is performed in the order of refrigerant recovery, refrigerant regeneration, evacuation, and refrigerant filling of the vehicle, and cleaning is performed as necessary.

図1に示すように、本実施例に係る冷媒回収装置における回収充填経路は、冷凍機油の種類(PAGとPOEの二種類)に対応した夫々独立となる専用の冷媒回収充填経路、即ち、ベルト駆動コンプレッサ対応冷媒回収充填経路3と、電動コンプレッサ対応冷媒回収充填経路2とを有する。   As shown in FIG. 1, the recovery and filling path in the refrigerant recovery apparatus according to the present embodiment is an independent dedicated refrigerant recovery and charging path corresponding to the type of refrigerating machine oil (two types of PAG and POE), that is, a belt. A refrigerant recovery / filling path 3 for driving compressor and a refrigerant recovery / filling path 2 for electric compressor are provided.

これらの各専用の冷媒回収充填経路は、車両用空調システム接続するための高圧側、低圧側の各専用ホース20、30と該専用ホース20、30が接続される専用経路(電動コンプレッサ対応冷媒回収充填経路2又はベルト駆動コンプレッサ対応冷媒回収充填経路3)とを備えている。そして当該専用経路には、オイルセパレータ21、廃油タンク21a、ドライフィルタ22、コンプレッサ23、真空ポンプ24、洗浄用精製冷媒回収タンク4等が配置される。また、電動コンプレッサ搭載車に対してPOEを充填するためのPOE油対応冷媒充填タンク25が設けられる。
尚、図1から図3中における各EVで始まる記号(EV1、EV2、EV3、EV5、EV6、EV7、EV6´、EV7´、EV13、EV19、EV20、EV24)は夫々電磁弁を示している。図示されない制御装置であるCPUにより制御され、工程プログラムに応じて開閉動作を行う。
Each of these dedicated refrigerant recovery and filling paths is connected to the high-pressure and low-pressure dedicated hoses 20 and 30 for connection to the vehicle air conditioning system and the dedicated paths for connecting the dedicated hoses 20 and 30 (refrigerant recovery for electric compressors). A charging path 2 or a belt collecting compressor compatible refrigerant recovery and charging path 3). In the dedicated path, an oil separator 21, a waste oil tank 21a, a dry filter 22, a compressor 23, a vacuum pump 24, a cleaning purified refrigerant recovery tank 4, and the like are arranged. Further, a POE oil-compatible refrigerant filling tank 25 is provided for filling the electric compressor-equipped vehicle with POE.
In FIG. 1 to FIG. 3, symbols (EV1, EV2, EV3, EV5, EV6, EV7, EV6 ′, EV7 ′, EV13, EV19, EV20, EV24) beginning with each EV indicate a solenoid valve. It is controlled by a CPU, which is a control device (not shown), and performs an opening / closing operation according to a process program.

前記洗浄用精製冷媒回収タンク4には、計量器40が付設されている。後記の回収工程においては前記計量器によって回収量の測定を行うことができ、充填工程においては充填量の測定を行うことができる。回収量に対して充填時に不足した量を追加充填量とし、前記洗浄用精製冷媒回収タンク4から車両に対して冷媒ガスを補充することが出来るものとしている。また、POE油対応冷媒充填タンク25にも、同様に計量器が付設されている。POE油対応冷媒充填タンク25は冷媒の回収には使用せず、専ら電動コンプレッサ搭載車専用とした冷媒を補充するためのものであり、当該タンク25内部の冷媒ガスを設定に応じた一定量を当該車両に対して補充することができるものとしている。このためPOE油対応冷媒充填タンク25の供給路には逆止弁14を設けている。   A meter 40 is attached to the cleaning purified refrigerant recovery tank 4. In the collection step described later, the collected amount can be measured by the measuring instrument, and in the filling step, the filling amount can be measured. An amount which is insufficient at the time of filling with respect to the recovered amount is set as an additional charged amount, and the refrigerant gas can be replenished to the vehicle from the cleaning purified refrigerant recovery tank 4. The POE oil compatible refrigerant filling tank 25 is similarly provided with a measuring device. The POE oil compatible refrigerant filling tank 25 is not used for collecting the refrigerant, but exclusively for replenishing the refrigerant dedicated to the vehicle equipped with the electric compressor. The refrigerant gas inside the tank 25 is set to a certain amount according to the setting. The vehicle can be replenished. For this reason, a check valve 14 is provided in the supply path of the POE oil compatible refrigerant filling tank 25.

専用経路における各冷媒の回収充填工程においては、車両における空調システムの冷媒の回収、再生、真空引き、充填が行われる。以下に、電動コンプレッサ搭載車を例として、より具体的に説明する。   In the recovery and filling process of each refrigerant in the dedicated path, the refrigerant is collected, regenerated, evacuated, and filled in the air conditioning system in the vehicle. Hereinafter, an electric compressor-equipped vehicle will be described more specifically as an example.

(回収・再生工程)
回収工程においては、電動コンプレッサ搭載車の空調システムと電動コンプレッサ専用ホースとを接続した状態で、冷媒回収充填装置におけるコンプレッサを用いて前記車両の冷媒を、前記電動コンプレッサ専用ホース20を介してオイルセパレータ21へ送り、オイルと回収冷媒ガスとを分離する。そして得られた再生ガスを、ドライフィルタ22を通して水分を除去した後、冷却ファンにより冷却し、再生冷媒ガスとして洗浄用精製冷媒回収タンク4へ送る。
(Recovery / regeneration process)
In the recovery process, with the air conditioning system of the vehicle equipped with the electric compressor and the electric compressor dedicated hose connected, the refrigerant of the vehicle is supplied to the oil separator through the electric compressor dedicated hose 20 using the compressor in the refrigerant recovery and filling device. 21 to separate oil and recovered refrigerant gas. Then, after removing the moisture from the obtained regenerated gas through the dry filter 22, the regenerated gas is cooled by a cooling fan, and sent to the cleaning purified refrigerant recovery tank 4 as a regenerated refrigerant gas.

(真空引き工程・充填工程)
そして、真空ポンプ24により真空引きを行うことにより、車両の空調システム内(例えば、車両のリキッドタンク内の乾燥・除湿剤等)を真空乾燥する。この後、前記洗浄用精製冷媒回収タンク4から再生冷媒ガスを前記車両へ充填する。以上が本発明の実施例に係る冷媒回収充填装置の冷媒回収充填機能であり、通常動作では当該冷媒回収充填機能で足りるが、上記したように、冷媒回収充填装置には、上記人為的なミス等によるPAG油の混入に対する何らかの手段が求められる。
このような不慮の事態への対応手段として本実施例は、次に示す洗浄手段及び洗浄工程を有する。
(Evacuation process / filling process)
Then, the inside of the air conditioning system of the vehicle (for example, the drying / dehumidifying agent in the liquid tank of the vehicle) is vacuum-dried by evacuation by the vacuum pump 24. Thereafter, the regenerated refrigerant gas is charged into the vehicle from the purified refrigerant recovery tank 4 for cleaning. The above is the refrigerant recovery and filling function of the refrigerant recovery and filling apparatus according to the embodiment of the present invention. In the normal operation, the refrigerant recovery and filling function is sufficient. Some means for mixing PAG oil due to the above is required.
As a means for dealing with such an unexpected situation, the present embodiment includes a cleaning means and a cleaning process described below.

(洗浄工程)
本実施例に係る冷媒回収充填装置の特化した洗浄工程を示す。実施例に係る冷媒回収充填装置における回収充填経路とは別に、洗浄手段1となる独立した精製冷媒供給経路を備えている。精製供給経路は、精製されたHFC−134aガスが充填された精製冷媒供給容器10と、該精製冷媒供給容器10に接続される洗浄用冷媒供給管11とを備える。洗浄用冷媒供給管11の先端にはカプラホルダーが取着されている。前記洗浄用冷媒供給管11には電磁弁及び逆止弁12を設置している。
また、本実施例においては、前記精製冷媒供給容器10(供給ガス缶)を2基(以下、第一容器10a、第二容器10bとする。)備えている。
(Washing process)
A specialized cleaning process of the refrigerant recovery and filling apparatus according to the present embodiment will be described. In addition to the recovery and filling path in the refrigerant recovery and filling apparatus according to the embodiment, an independent purified refrigerant supply path serving as the cleaning means 1 is provided. The purification supply path includes a purified refrigerant supply container 10 filled with purified HFC-134a gas, and a cleaning refrigerant supply pipe 11 connected to the purified refrigerant supply container 10. A coupler holder is attached to the tip of the cleaning refrigerant supply pipe 11. The cleaning refrigerant supply pipe 11 is provided with a solenoid valve and a check valve 12.
Further, in this embodiment, two purified refrigerant supply containers 10 (supply gas cans) are provided (hereinafter referred to as a first container 10a and a second container 10b).

洗浄手段1である精製冷媒供給経路は、冷媒の回収充填工程においては使用しないため、回収充填工程では前記カプラホルダーは冷媒回収充填経路2、3には接続しない。精製冷媒供給経路は、洗浄工程において、選択的に一方の冷媒回収充填経路(2又は3)に接続される。   Since the purified refrigerant supply path which is the cleaning means 1 is not used in the refrigerant recovery and charging process, the coupler holder is not connected to the refrigerant recovery and charging paths 2 and 3 in the recovery and charging process. The purified refrigerant supply path is selectively connected to one refrigerant recovery and charging path (2 or 3) in the cleaning step.

以下に、誤操作による不適当な冷凍機油による汚染発生状況の主要な一例と、汚染に対する洗浄の工程について説明する。   Below, the main example of the contamination generation | occurrence | production situation by the improper refrigerating machine oil by a misoperation, and the washing | cleaning process with respect to contamination are demonstrated.

汚染発生状況の主要な一例:選択モードスイッチを電動コンプレッサに設定し、ホース接続をベルト駆動コンプレッサ搭載車C2に誤接続C20し、冷媒回収充填装置を作業運転した場合、回収時に電動コンプレッサ専用ホース20内、専用配管内及び低圧・高圧メータに内蔵されるブルドン管にベルト駆動コンプレッサ用のPAG油が流入する。この段階で、電動コンプレッサ専用ホース20内にPAG油が混入された状態となる。
次に処理を行う車両が、電動コンプレッサ搭載車C1であった場合に、電動コンプレッサ専用ホース20を車両用空調システムに正規接続C10し、冷媒回収充填装置を運転させると、電動コンプレッサ搭載車C1の当該電動コンプレッサ内にPAG油が混入し、該電動コンプレッサが絶縁不良となる。
Main example of contamination occurrence state: When the selection mode switch is set to the electric compressor, the hose connection is erroneously connected to the belt-driven compressor-equipped vehicle C2, and the refrigerant recovery and filling device is operated and operated, the electric compressor hose 20 for recovery is used. The PAG oil for the belt drive compressor flows into the Bourdon tube built in the special pipe and the low and high pressure meters. At this stage, the PAG oil is mixed in the electric compressor dedicated hose 20.
Next, when the vehicle to be processed is the electric compressor-equipped vehicle C1, when the electric compressor dedicated hose 20 is normally connected to the vehicle air conditioning system C10 and the refrigerant recovery and charging device is operated, the electric compressor-equipped vehicle C1 PAG oil is mixed in the electric compressor, and the electric compressor has poor insulation.

上記不具合に対して、冷媒回収充填装置の電動コンプレッサ専用ホース20内、専用配管内及び低圧・高圧メータに内蔵されるブルドン管等をHRC―134aにより洗浄する。
本実施例における洗浄工程を以下に説明する。
In response to the above problem, the HRC-134a is used to clean the inside of the hose 20 dedicated to the electric compressor of the refrigerant recovery and filling device, the dedicated piping, and the Bourdon tube incorporated in the low and high pressure meters.
The cleaning process in the present embodiment will be described below.

洗浄工程:図2に示すように、電動コンプレッサ専用ホース20を冷媒回収充填装置のガス洗浄用のカプラホルダー13に接続する。   Cleaning step: As shown in FIG. 2, the electric compressor hose 20 is connected to the gas cleaning coupler holder 13 of the refrigerant recovery and filling device.

洗浄動作を開始する。尚、本実施例においては、冷媒回収充填装置に設置されるオイル洗浄スイッチをONとし、操作パネルのスタートボタンを押下することで開始される。   Start cleaning operation. In this embodiment, the operation is started by turning on an oil washing switch installed in the refrigerant recovery and charging device and pressing a start button on the operation panel.

前記操作パネルのスタートボタンの押下により、冷媒回収充填装置内の真空ポンプ24が作動し、電動コンプレッサ専用ホース20内、低高圧ゲージ内部、装置内の真空引きを行う。真空引きは、精製冷媒が当該電動コンプレッサ専用ホース20内、低高圧ゲージ26a、26bの内部、冷媒回収充填経路内等への流入を容易とするための工程である。   When the start button on the operation panel is pressed, the vacuum pump 24 in the refrigerant recovery / filling device is activated to evacuate the electric compressor hose 20, the low-high pressure gauge, and the device. The evacuation is a process for facilitating the flow of the purified refrigerant into the electric compressor hose 20, the inside of the low and high pressure gauges 26 a and 26 b, the refrigerant collection and charging path, and the like.

次に、電動コンプレッサ専用ホース20内、低高圧ゲージ26a、26bの内部、冷媒回収充填経路内等に対して洗浄用の精製冷媒が精製冷媒供給容器10から約40〜50g程度の量を5秒間で噴射充填する。これらの配管内を通過した精製冷媒は、コンプレッサ23を介して、洗浄用精製冷媒回収タンク4へ回収、貯留される。   Next, about 40 to 50 g of purified refrigerant for cleaning is supplied from the purified refrigerant supply container 10 to the electric compressor dedicated hose 20, the inside of the low- and high-pressure gauges 26 a and 26 b, the refrigerant collection and filling path, etc. for 5 seconds. Fill with spray. The purified refrigerant that has passed through these pipes is recovered and stored in the cleaning purified refrigerant recovery tank 4 via the compressor 23.

圧力センサL1からの所定圧力の検知信号を受信した本装置の制御部であるCPUが、所定時間の経過によりコンプレッサ23を停止させる。これによって、第一容器10a内の精製冷媒についての洗浄が終了する。   The CPU that is the control unit of the present apparatus that has received the detection signal of the predetermined pressure from the pressure sensor L1 stops the compressor 23 when a predetermined time elapses. Thereby, the cleaning of the purified refrigerant in the first container 10a is completed.

真空引き、充填、回収洗浄の一連の動作は、繰り返し行うことが可能である。本実施例では、再度、当該一連の動作を行うものとしている。即ち、再度の真空引きを実行した後、再度、第一容器10a内の精製冷媒を、設定時間の間(例えば、5秒間)前記電動コンプレッサ専用ホース20内、低高圧ゲージ内部、装置内等へ注入させる。   A series of operations of evacuation, filling, and recovery cleaning can be performed repeatedly. In this embodiment, the series of operations are performed again. That is, after executing the evacuation again, the purified refrigerant in the first container 10a is again transferred to the electric compressor dedicated hose 20, the inside of the low and high pressure gauge, the inside of the apparatus, etc. for a set time (for example, 5 seconds). Inject.

第一容器10a内の精製冷媒の注入、洗浄後に、第二容器10b内の精製冷媒について、同様に、注入する。真空引きによる負圧効果が持続しているため、第二容器10b内の精製冷媒が前記電動コンプレッサ専用ホース20内、低高圧ゲージ内部、装置内等へ流入する。これらの配管内を通過した精製冷媒は、コンプレッサ23を介して、前記洗浄用精製冷媒回収タンク4へ回収、貯留される。   After the injection and cleaning of the purified refrigerant in the first container 10a, the purified refrigerant in the second container 10b is similarly injected. Since the negative pressure effect due to evacuation continues, the purified refrigerant in the second container 10b flows into the electric compressor dedicated hose 20, the low-high pressure gauge, the apparatus, and the like. The purified refrigerant that has passed through these pipes is recovered and stored in the cleaning purified refrigerant recovery tank 4 via the compressor 23.

洗浄用精製冷媒回収タンク4に回収された使用済みの精製冷媒は、洗浄工程においてオイルセパレータ21、ドライフィルタ22を経て回収される過程で、再生冷媒として使用可能となるため、廃棄する必要はないものとすることができる。このため、上述のように、回収量に対して充填時に不足した量を追加充填量とし、前記洗浄用精製冷媒回収タンク4から車両に対して冷媒ガスを補充することができる。   The used purified refrigerant recovered in the cleaning purified refrigerant recovery tank 4 can be used as a regenerated refrigerant in the process of being recovered through the oil separator 21 and the dry filter 22 in the cleaning process, and therefore does not need to be discarded. Can be. For this reason, as described above, an amount which is insufficient at the time of filling with respect to the recovered amount can be used as an additional charging amount, and the refrigerant gas can be replenished from the cleaning purified refrigerant recovery tank 4 to the vehicle.

また、上記汚染発生状況の主要な一例として、電動コンプレッサ対応冷媒回収充填経路2について示したが、本発明によれば、上記実施例に限定されるものではなく、例えば、ベルト駆動コンプレッサ対応冷媒回収充填経路3についても、ベルト駆動コンプレッサ専用ホース30と洗浄用冷媒供給管11の前記カプラホルダー13とを接続し、真空引き及び洗浄工程を行うことにより、同様に洗浄効果を得ることができる。   In addition, as a main example of the pollution occurrence state, the electric compressor compatible refrigerant recovery and charging path 2 has been shown. However, according to the present invention, the present invention is not limited to the above-described embodiment. For the filling path 3 as well, a cleaning effect can be similarly obtained by connecting the belt-driven compressor dedicated hose 30 and the coupler holder 13 of the cleaning refrigerant supply pipe 11 and performing a vacuuming and cleaning process.

尚、本実施例ではHRC−134aを冷媒としているが、本発明はこれに限定されるものではなく、公知又は将来的に使用される代替冷媒を適宜用いることもできる。   In the present embodiment, HRC-134a is used as the refrigerant. However, the present invention is not limited to this, and a known or future alternative refrigerant may be used as appropriate.

また、本実施例では冷凍機油として、PAG油及びPOE油を区別し、洗浄するものとしたが、本発明はこれに限定されるものではなく、公知又は将来的に使用される代替冷凍機油を適宜用いることができる。   Further, in this embodiment, PAG oil and POE oil are distinguished and washed as refrigeration oil, but the present invention is not limited to this, and a known or future alternative refrigeration oil is used. It can be used as appropriate.

また、本実施例では精製冷媒供給容器10を、第一容器10a及び第二容器10bの2基設けたものとしているが、本発明はこれに限るものではなく、精製冷媒供給容器を1基のみとして、貯留される精製冷媒を複数回に分けて使用するものとすることもできるし、3基以上の精製冷媒供給容器10を設けることもできる。   Further, in this embodiment, the two purified refrigerant supply containers 10 are provided as the first container 10a and the second container 10b. However, the present invention is not limited to this, and only one purified refrigerant supply container is provided. As described above, the stored purified refrigerant can be used in a plurality of times, and three or more purified refrigerant supply containers 10 can be provided.

1 洗浄手段
10 精製冷媒供給容器
10a 第一容器
10b 第二容器
11 洗浄用冷媒供給管
12 逆止弁
13 カプラホルダー
14 逆止弁
2 冷媒回収充填経路(電動コンプレッサ専用)
20 電動コンプレッサ専用ホース
21 リターナ(オイルセパレータ)
21a 廃油タンク
22 ドライフィルタ
23 コンプレッサ
24 真空ポンプ
25 POE油対応冷媒充填タンク
26a 高圧ゲージ
26b 低圧ゲージ
3 冷媒回収充填経路(ベルト駆動コンプレッサ専用)
30 ベルト駆動コンプレッサ専用ホース
36a 高圧ゲージ
36b 低圧ゲージ
4 洗浄用精製冷媒回収タンク
40 計量器
C1 電動コンプレッサ搭載車
C10 正規接続
C2 ベルト駆動コンプレッサ搭載車
C20 誤接続
L1 圧力センサ
DESCRIPTION OF SYMBOLS 1 Cleaning means 10 Purified refrigerant supply container 10a First container 10b Second container 11 Cleaning refrigerant supply pipe 12 Check valve 13 Coupler holder 14 Check valve 2 Refrigerant recovery filling path (for electric compressor only)
20 Electric compressor hose 21 Returner (oil separator)
21a Waste Oil Tank 22 Dry Filter 23 Compressor 24 Vacuum Pump 25 POE Oil Compatible Refrigerant Filling Tank 26a High Pressure Gauge 26b Low Pressure Gauge 3 Refrigerant Recovery Filling Path (Dedicated to Belt Drive Compressor)
30 Belt drive compressor dedicated hose 36a High pressure gauge
36b Low pressure gauge 4 Purified refrigerant recovery tank for cleaning 40 Meter C1 Car equipped with electric compressor C10 Regular connection C2 Car equipped with belt drive compressor C20 Misconnection L1 Pressure sensor

Claims (4)

冷凍機油が混合される複数種類の冷媒を回収充填可能とする回収充填手段と、管路の洗浄手段と、真空ポンプを備える冷媒回収充填装置において、
前記洗浄手段は、精製冷媒を貯留するための精製冷媒供給容器と、該精製冷媒供給容器に接続される洗浄用冷媒供給管とを備え、
回収充填手段は、前記複数種類の冷媒に対応した複数の接続部とコンプレッサを備え、
前記洗浄用冷媒供給管と前記いずれかの接続部を接続して、前記洗浄手段から冷媒回収充填経路を通じて回収容器内へ冷媒を直接流入させる管路を備えたことを特徴とする冷媒回収充填装置。
In a refrigerant recovery and filling device including a recovery and filling means capable of recovering and filling a plurality of types of refrigerant mixed with refrigerating machine oil, a pipe cleaning means, and a vacuum pump,
The cleaning means includes a purified refrigerant supply container for storing purified refrigerant, and a cleaning refrigerant supply pipe connected to the purified refrigerant supply container,
The collection and filling means includes a plurality of connection portions and a compressor corresponding to the plurality of types of refrigerant,
A refrigerant recovery / filling device comprising: a pipe for connecting the cleaning refrigerant supply pipe and any one of the connecting portions and allowing the refrigerant to directly flow into the recovery container from the cleaning means through the refrigerant recovery / filling path. .
精製冷媒供給管に逆止弁を設けたことを特徴とする請求項1記載の冷媒回収充填装置。   The refrigerant recovery and filling device according to claim 1, wherein a check valve is provided in the purified refrigerant supply pipe. 冷凍機油が混合される複数種類の冷媒を回収充填可能とする回収充填手段と、管路の洗浄手段と、真空ポンプを備える冷媒回収充填装置の洗浄方法において、
前記洗浄手段は、精製冷媒を貯留するための精製冷媒供給容器と、該精製冷媒供給容器に接続される洗浄用冷媒供給管を備え、
回収充填手段は、前記複数種類の冷媒に対応した複数の接続部とコンプレッサを備え、
前記洗浄用冷媒供給管と前記いずれかの接続部を接続して、真空ポンプで真空引きを行った後、前記精製冷媒供給容器から選択された前記接続部を介して回収充填容器内の管路を経由し、冷媒を回収容器へ直接流入させることを特徴とする冷媒回収充填装置の洗浄方法。
In a method for cleaning a refrigerant recovery and filling device including a recovery and filling means capable of recovering and filling a plurality of types of refrigerant mixed with refrigerating machine oil, a means for cleaning a pipeline, and a vacuum pump,
The cleaning means includes a purified refrigerant supply container for storing the purified refrigerant, and a cleaning refrigerant supply pipe connected to the purified refrigerant supply container,
The collection and filling means includes a plurality of connection portions and a compressor corresponding to the plurality of types of refrigerant,
After connecting the cleaning refrigerant supply pipe and any one of the connecting parts and performing evacuation with a vacuum pump, a pipe line in the collection and filling container is selected via the connecting part selected from the purified refrigerant supply container. A method for cleaning a refrigerant recovery and filling apparatus, wherein the refrigerant is caused to flow directly into a recovery container via
冷媒回収充填装置の管路に真空ポンプを備え、該真空ポンプによる真空引き後に精製冷媒供給容器からの精製冷媒の投入を、複数回実行する工程を有することを特徴とする請求項3記載の冷媒回収充填装置の洗浄方法。   4. The refrigerant according to claim 3, further comprising a step of providing a vacuum pump in a pipe line of the refrigerant recovery and filling device, and performing the charging of the purified refrigerant from the purified refrigerant supply container a plurality of times after evacuation by the vacuum pump. A method for cleaning the recovery and filling apparatus.
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