JP4605784B2 - Engine-driven heat pump having an operation mode for cleaning the connecting pipe between the outdoor unit and the indoor unit, and its operation method - Google Patents

Engine-driven heat pump having an operation mode for cleaning the connecting pipe between the outdoor unit and the indoor unit, and its operation method Download PDF

Info

Publication number
JP4605784B2
JP4605784B2 JP2005320110A JP2005320110A JP4605784B2 JP 4605784 B2 JP4605784 B2 JP 4605784B2 JP 2005320110 A JP2005320110 A JP 2005320110A JP 2005320110 A JP2005320110 A JP 2005320110A JP 4605784 B2 JP4605784 B2 JP 4605784B2
Authority
JP
Japan
Prior art keywords
refrigerant
engine
path
outdoor
outdoor unit
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.)
Expired - Fee Related
Application number
JP2005320110A
Other languages
Japanese (ja)
Other versions
JP2007127325A (en
Inventor
郁男 水野
貴彦 増田
浩 澤田
将文 篠宮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yanmar Co Ltd
Original Assignee
Yanmar Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yanmar Co Ltd filed Critical Yanmar Co Ltd
Priority to JP2005320110A priority Critical patent/JP4605784B2/en
Publication of JP2007127325A publication Critical patent/JP2007127325A/en
Application granted granted Critical
Publication of JP4605784B2 publication Critical patent/JP4605784B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started

Landscapes

  • Air Conditioning Control Device (AREA)

Description

本発明は、エンジン駆動式ヒートポンプ、詳しくは、室外機と室内機の連絡配管の洗浄技術に関係する。   The present invention relates to an engine-driven heat pump, and more particularly, to a technology for cleaning a communication pipe between an outdoor unit and an indoor unit.

フロン系冷媒がフロン規制の対象となったことから、その代替冷媒としてＨＦＣ系冷媒が用いられるようになってきている。このＨＦＣ系冷媒は分子構造中に塩素原子を含んでいないため、圧縮機の潤滑性能が低下する。また、ＨＦＣ系冷媒は、その構造上極性が強いため、非極性のスラッジやコンタミ物質（鉱油など）を溶解させず、凝縮した液冷媒中に析出させやすい性質がある。そして、このような析出物はキャピラリや膨張弁などの狭くくびれた部分に付着して、詰まりを生じさせる。その結果、圧縮機の吐出管温度の異常上昇や膨張弁の作動不良などの不具合が発生することになる。   Since chlorofluorocarbon refrigerants have been subject to chlorofluorocarbon regulations, HFC refrigerants have come to be used as alternative refrigerants. Since this HFC-based refrigerant does not contain chlorine atoms in its molecular structure, the lubricating performance of the compressor is lowered. In addition, since the HFC-based refrigerant has a strong polarity due to its structure, it does not dissolve non-polar sludge and contaminants (mineral oil, etc.), and has the property of being easily deposited in the condensed liquid refrigerant. And such a deposit adheres to narrow constricted parts, such as a capillary and an expansion valve, and causes clogging. As a result, problems such as an abnormal rise in the discharge pipe temperature of the compressor and malfunction of the expansion valve occur.

また、このＨＦＣ系冷媒に対しては、冷凍機油における冷媒との相互溶解性が重要な特性の一つとなるため、冷凍機油としてエーテル油やエステル油等の合成油が用いられている。しかしながら、これらの合成油は、極性が強いため、冷凍機油及び冷媒以外の残留不純物を溶かしやすいという性質を有している。そのため、冷凍機油として合成油を用いた冷凍装置では、電子膨張弁で構成された減圧機構において、冷媒が蒸発したあとのスラッジ等による詰まりが生じやすく、膨張弁の作動不良などの不具合が発生することになる。   Moreover, since mutual solubility with the refrigerant | coolant in refrigerating machine oil becomes one of the important characteristics with respect to this HFC type | system | group refrigerant | coolant, synthetic oils, such as ether oil and ester oil, are used as refrigerating machine oil. However, since these synthetic oils have strong polarity, they have the property of easily dissolving residual impurities other than refrigerating machine oil and refrigerant. Therefore, in a refrigeration system using synthetic oil as refrigerating machine oil, clogging due to sludge after the refrigerant evaporates easily occurs in a decompression mechanism constituted by an electronic expansion valve, which causes problems such as malfunction of the expansion valve. It will be.

ところで、ビル又はマンションにおいては、室外機と室内機を接続する連絡配管が壁面内に埋設されていることが多い。ここで、既設の空気調和装置を撤去して新たな空気調和装置を設置する場合に、最近、既設連絡配管をそのまま使用するケースもあり、その場合、既設連絡配管内における残留冷凍機油等のコンタミ物質の存在が問題となる。特に、ＨＦＣ系冷媒を使用する場合には、この既設配管内の残留コンタミ物質を除去しておく必要がある。   By the way, in buildings or condominiums, communication pipes connecting outdoor units and indoor units are often embedded in the wall surface. Here, when removing an existing air conditioner and installing a new air conditioner, there is a case where the existing communication pipe is used as it is recently. In such a case, contamination of residual refrigeration oil, etc. in the existing communication pipe The presence of the substance becomes a problem. In particular, when an HFC-based refrigerant is used, it is necessary to remove residual contaminants in the existing piping.

この連絡配管の洗浄方法として、例えば、特許文献１では、所定時間以上の冷房運転を実施して冷媒を昇温させ、その後にポンプダウン運転を実施し、冷媒及び油を回収する方法を開示している。
この方法では、冷媒回路内の冷凍機油等のコンタミ物質が冷媒と溶解しやすくなった状態で冷媒及び油が回収されることにより、連絡配管のコンタミ物質を効率良く回収することができる。
特開２００３−２４０３６８号公報 As a method for cleaning this communication pipe, for example, Patent Document 1 discloses a method of recovering refrigerant and oil by performing a cooling operation for a predetermined time or more to raise the temperature of the refrigerant and then performing a pump-down operation. ing.
In this method, the contaminant substance in the communication pipe can be efficiently recovered by recovering the refrigerant and oil in a state in which the contaminant substance such as refrigeration oil in the refrigerant circuit is easily dissolved with the refrigerant.
JP 2003-240368 A

しかし、特許文献１の配管洗浄運転では、ガス側の連絡配管は、ガス冷媒により洗浄されるため、洗浄が不十分となる場合がある。
そこで、解決しようとする課題は、エンジン駆動式ヒートポンプにおいて室外機と室内機とのガス側の連絡配管の洗浄能力を向上させることである。 However, in the pipe cleaning operation of Patent Document 1, the communication pipe on the gas side is cleaned with a gas refrigerant, so that cleaning may be insufficient.
Therefore, the problem to be solved is to improve the cleaning ability of the communication pipe on the gas side between the outdoor unit and the indoor unit in the engine-driven heat pump.

本発明の解決しようとする課題は以上の如くであり、次にこの課題を解決するための手段を説明する。   The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

即ち、請求項１においては、エンジン駆動による圧縮機と、室外熱交換器と、高圧の液冷媒を貯留するレシーバと、前記エンジンの廃熱により冷媒を蒸発させる廃熱回収器と、を有する室外機と、個々に膨張弁を有する複数の室内機と、前記複数の室内機と室外機とを接続すると共にその経路上に前記複数の室内機と室外機との連通を制御する開閉手段を有する連絡配管と、より構成されるエンジン駆動式ヒートポンプにおいて、前記開閉手段が閉状態で室外機の冷媒を前記レシーバ又は室外熱交換器に回収する運転モードと、前記開閉手段が開状態で全室内機の膨張弁を全開にして冷房運転時と同じ経路で冷媒を循環して前記廃熱回収器で冷媒蒸発を行なう運転モードと、前記開閉手段が開状態で全室内機の膨張弁を全閉にして前記連絡配管のガス側配管内の冷媒を吸引して前記廃熱回収器で冷媒蒸発を行なう運転モードと、を備えるものである。   That is, in claim 1, an outdoor unit having an engine-driven compressor, an outdoor heat exchanger, a receiver that stores high-pressure liquid refrigerant, and a waste heat recovery unit that evaporates the refrigerant by waste heat of the engine. A plurality of indoor units each having an expansion valve, and opening / closing means for connecting the plurality of indoor units and the outdoor unit and controlling communication between the plurality of indoor units and the outdoor unit on the path In an engine-driven heat pump comprising a communication pipe, an operation mode in which the refrigerant of the outdoor unit is collected in the receiver or the outdoor heat exchanger when the opening / closing means is closed, and all indoor units are opened when the opening / closing means is open. The operation mode in which the expansion valve is fully opened and the refrigerant is circulated through the same path as in the cooling operation and the refrigerant is evaporated in the waste heat recovery device, and the expansion valve of all the indoor units is fully closed when the open / close means is open. Contact The operating mode for the refrigerant evaporated in the waste heat recovery device to the refrigerant in the gas side in the piping by suction are those comprising a.

請求項２においては、請求項１記載のエンジン駆動式ヒートポンプの運転方法において、最初に、前記開閉手段が閉状態で室外機の冷媒を前記レシーバ又は室外熱交換器に回収する運転を行ない、続いて、前記開閉手段が開状態で全室内機の膨張弁を全開にして冷房運転時と同じ経路で冷媒を循環して前記廃熱回収器で冷媒蒸発を行なう運転を行ない、最後に、前記開閉手段が開状態で全室内機の膨張弁を全閉にして前記連絡配管のガス側配管内の冷媒を吸引して前記廃熱回収器で冷媒蒸発を行なう運転を行なうものである。   According to claim 2, in the operation method of the engine-driven heat pump according to claim 1, first, an operation of collecting the refrigerant of the outdoor unit in the receiver or the outdoor heat exchanger with the opening and closing means being closed is performed. Then, with the opening / closing means open, the expansion valves of all the indoor units are fully opened, the refrigerant is circulated through the same path as in the cooling operation, and the refrigerant is evaporated in the waste heat recovery unit. With the means open, the expansion valves of all the indoor units are fully closed, the refrigerant in the gas side pipe of the communication pipe is sucked, and the refrigerant is evaporated in the waste heat recovery unit.

本発明の効果として、以下に示すような効果を奏する。   As effects of the present invention, the following effects can be obtained.

即ち、請求項１においては、連絡配管の液側のみならず、ガス側も液冷媒による洗浄が可能となり、さらには、ガス側の連絡配管に関しては、その配管内の冷媒吸引運転によりコンタミ等の回収が一層、可能となる。そのため、液側より配管径の大きいガス側の連絡配管の洗浄を入念に行なうことが可能となる。   That is, in claim 1, not only the liquid side of the communication pipe but also the gas side can be cleaned with liquid refrigerant. Furthermore, with respect to the communication pipe on the gas side, contamination or the like is caused by the refrigerant suction operation in the pipe. Recovery is further possible. Therefore, it is possible to carefully clean the communication pipe on the gas side having a pipe diameter larger than that on the liquid side.

また、請求項２では、請求項１記載のエンジン駆動式ヒートポンプにおいて最適な手順での連絡配管の洗浄が可能となる。   Further, according to the second aspect, the communication pipe can be cleaned in an optimum procedure in the engine-driven heat pump according to the first aspect.

次に、発明の実施の形態を説明する。
図１は本発明の実施例に係るエンジン駆動式ヒートポンプの全体的な構成を示した冷媒回路図、図２は室外機の冷媒をレシーバ又は室外熱交換器に回収する運転状態の冷媒挙動を示す冷媒回路図、図３は液及びガス側連絡配管を液冷媒で洗浄する運転状態の冷媒挙動を示す冷媒回路図である。図４はガス側連絡配管の冷媒を圧縮機で吸引する運転状態の冷媒挙動を示す冷媒回路図、図５は配管洗浄運転の各運転状態での機器動作を示す図である。 Next, embodiments of the invention will be described.
FIG. 1 is a refrigerant circuit diagram showing the overall configuration of an engine-driven heat pump according to an embodiment of the present invention, and FIG. 2 shows refrigerant behavior in an operating state in which the refrigerant of the outdoor unit is collected by the receiver or the outdoor heat exchanger. FIG. 3 is a refrigerant circuit diagram showing a refrigerant behavior in an operation state in which the liquid and gas side connecting pipe is washed with a liquid refrigerant. FIG. 4 is a refrigerant circuit diagram showing the refrigerant behavior in the operation state in which the refrigerant in the gas side communication pipe is sucked by the compressor, and FIG. 5 is a diagram showing the equipment operation in each operation state of the pipe cleaning operation.

図１を用いて、本発明の実施例であるエンジン駆動式ヒートポンプ１の冷媒回路構成について説明する。本実施例では、説明を簡略にするため、１台の室外機２に対し１台の室内機３が接続されるエンジン駆動式ヒートポンプ１を例示しているが、実際には、１台の室外機２に対し複数台の室内機３・・３が接続されることが多い。   The refrigerant circuit configuration of an engine-driven heat pump 1 that is an embodiment of the present invention will be described with reference to FIG. In the present embodiment, for simplicity of explanation, the engine-driven heat pump 1 in which one indoor unit 3 is connected to one outdoor unit 2 is illustrated, but actually, one outdoor unit In many cases, a plurality of indoor units 3... 3 are connected to the unit 2.

エンジン駆動式ヒートポンプ１は、駆動源としてのエンジン（図示略）から動力を得て冷媒を圧縮する圧縮機１０と、該圧縮機１０の吐出側に接続され冷房時及び暖房時で冷媒の流れを切り換える四方弁２０と、冷房時に圧縮機１０から四方弁２０を介して吐出冷媒が供給される室外熱交換器１２と、該室外熱交換器１２を室外空気と熱交換させる室外ファン５と、暖房時に圧縮機１０から四方弁２０を介して吐出冷媒が供給される室内熱交換器１３と、該室内熱交換器１３を室内空気と熱交換させる室内ファン６と、室外熱交換器１２及び室内熱交換器１３間に配設される室外熱交換器膨張弁２１とを有しており、これらで構成される冷媒サイクルを用いるものである。   The engine-driven heat pump 1 includes a compressor 10 that obtains power from an engine (not shown) as a drive source and compresses the refrigerant, and is connected to the discharge side of the compressor 10 to flow the refrigerant during cooling and heating. A four-way valve 20 for switching, an outdoor heat exchanger 12 to which discharged refrigerant is supplied from the compressor 10 via the four-way valve 20 during cooling, an outdoor fan 5 for exchanging heat between the outdoor heat exchanger 12 and outdoor air, and heating An indoor heat exchanger 13 that is sometimes supplied with refrigerant discharged from the compressor 10 via the four-way valve 20, an indoor fan 6 that exchanges heat between the indoor heat exchanger 13 and indoor air, an outdoor heat exchanger 12 and indoor heat. It has the outdoor heat exchanger expansion valve 21 arrange | positioned between the exchangers 13, and uses the refrigerant cycle comprised by these.

前記圧縮機１０は、その吸入側からガス冷媒を吸引・圧縮し、高温・高圧のガス冷媒を吐出する。圧縮機１０の吐出側には、吐出ラインを構成する経路６０を介して前記四方弁２０が接続されており、この経路６０にはガス冷媒中に含まれる冷凍機油を分離して圧縮機１０の吸入側に戻すためのオイルセパレータ１１が設けられている。すなわち、圧縮機１０から吐出されるガス冷媒は、オイルセパレータ１１を介して前記四方弁２０へと流入し、この四方弁２０にて所定の方向に導かれる。また、圧縮機１０に吸引されるガス冷媒も四方弁２０にて導かれるため、圧縮機１０の冷媒吸入側と四方弁２０とは吸入ラインを構成する経路６１により接続されている。なお、吐出管温度センサ７は、圧縮機１０により吐出される高温・高圧のガス冷媒温度を検知するため、経路６０の圧縮機１０側に設けられる。   The compressor 10 sucks and compresses the gas refrigerant from the suction side and discharges the high-temperature and high-pressure gas refrigerant. The four-way valve 20 is connected to the discharge side of the compressor 10 via a path 60 constituting a discharge line. The path 60 separates the refrigeration oil contained in the gas refrigerant and An oil separator 11 for returning to the suction side is provided. That is, the gas refrigerant discharged from the compressor 10 flows into the four-way valve 20 through the oil separator 11 and is guided in a predetermined direction by the four-way valve 20. Further, since the gas refrigerant sucked into the compressor 10 is also guided by the four-way valve 20, the refrigerant suction side of the compressor 10 and the four-way valve 20 are connected by a path 61 that constitutes a suction line. The discharge pipe temperature sensor 7 is provided on the compressor 10 side of the path 60 in order to detect the temperature of the high-temperature and high-pressure gas refrigerant discharged by the compressor 10.

前記四方弁２０は、前記室外熱交換器１２の一端側に接続されており、この室外熱交換器１２の他端側には、レシーバ１４が接続されている。一方、室内熱交換器１３は、一端が、液側連絡配管５０を介して、前記レシーバ１４に接続されており、他端は、ガス側連絡配管５１を介して、四方弁２０に接続されている。これら液側連絡配管５０及びガス側連絡配管５１は、建物内部に設置されている場合が多く、最近では空調機更新時にはそのまま利用される場合がある。また、これら連絡配管５０・５１の室外機２側には、それぞれ液閉鎖弁４０及びガス閉鎖弁４１が設けられている。これら液閉鎖弁４０、ガス閉鎖弁４１および後述する閉鎖弁４２〜４５は、ボールバルブで構成され、手動により開閉される。   The four-way valve 20 is connected to one end side of the outdoor heat exchanger 12, and a receiver 14 is connected to the other end side of the outdoor heat exchanger 12. On the other hand, one end of the indoor heat exchanger 13 is connected to the receiver 14 via the liquid side communication pipe 50, and the other end is connected to the four-way valve 20 via the gas side communication pipe 51. Yes. The liquid side communication pipe 50 and the gas side communication pipe 51 are often installed inside a building, and recently, they may be used as they are when an air conditioner is updated. Further, a liquid closing valve 40 and a gas closing valve 41 are provided on the side of the outdoor unit 2 of these communication pipes 50 and 51, respectively. These liquid closing valve 40, gas closing valve 41, and closing valves 42 to 45 described later are constituted by ball valves and are manually opened and closed.

廃熱回収器１５は、前記室外熱交換器膨張弁２１とレシーバ１４の間から分岐し、経路６１に接続される経路６３に設けられている。該経路６３には、経路６１に向かって廃熱回収器膨張弁２２、過冷却熱交換器１７、廃熱回収器１５の順にて、これらが直列に接続されている。前記経路６３を通過する冷媒は、蒸発潜熱により、レシーバ１４内の液冷媒を、過冷却熱交換器１７にて過冷却し、廃熱回収器１５でエンジン冷却水からエンジンの廃熱を回収して蒸発する。   The waste heat recovery unit 15 branches from the outdoor heat exchanger expansion valve 21 and the receiver 14 and is provided in a path 63 connected to the path 61. To the path 63, the waste heat recovery device expansion valve 22, the supercooling heat exchanger 17, and the waste heat recovery device 15 are connected in series toward the path 61. The refrigerant passing through the path 63 subcools the liquid refrigerant in the receiver 14 by latent heat of vaporization in the supercooling heat exchanger 17 and recovers engine waste heat from the engine cooling water in the waste heat recovery unit 15. Evaporate.

経路６４は、冷媒充填終了の検知を可能とする経路である。該経路６４は、前記レシーバ１４内において、液冷媒の適正液面位置からレシーバ１４底面より取り出される。また、該経路６４は、充填検知電磁弁３０及びキャピラリ２６を介して、経路６３上の廃熱回収器膨張弁２２と過冷却熱交換器１７との間に接続される。   The path 64 is a path that enables detection of completion of refrigerant charging. The path 64 is taken out from the bottom surface of the receiver 14 from the appropriate liquid surface position of the liquid refrigerant in the receiver 14. The path 64 is connected between the waste heat recovery device expansion valve 22 on the path 63 and the supercooling heat exchanger 17 via the filling detection electromagnetic valve 30 and the capillary 26.

経路６５及び経路６６は、吐出ラインである経路６０と吸入ラインである経路６１とを短絡するバイパス経路である。経路６５には、減圧機構としてバイパス膨張弁２４が、経路６６には、バイパス電磁弁３２が設けられている。これらバイパス経路６５・６６は、圧縮機１０の吐出ガスを短絡して吸入ラインに戻すことで、エンジン駆動式ヒートポンプ１の高圧側圧力の異常上昇を防止する。   The path 65 and the path 66 are bypass paths that short-circuit the path 60 that is the discharge line and the path 61 that is the suction line. The path 65 is provided with a bypass expansion valve 24 as a pressure reducing mechanism, and the path 66 is provided with a bypass electromagnetic valve 32. These bypass paths 65 and 66 prevent an abnormal increase in the high-pressure side pressure of the engine-driven heat pump 1 by short-circuiting the discharge gas of the compressor 10 and returning it to the suction line.

経路６７は、前記レシーバ１４の上面から、前記吐出ラインである経路６０に向かう経路である。該経路６７は、レシーバ１４の高圧が異常上昇したとき、ガス冷媒を吐出ラインへ逃がすことができる。また、経路６７は、逆止弁７５及び７６を介して、高温・高圧の吐出ガス冷媒が、レシーバ１４に逆流することを防止している。   The path 67 is a path from the upper surface of the receiver 14 toward the path 60 that is the discharge line. The path 67 allows the gas refrigerant to escape to the discharge line when the high pressure of the receiver 14 rises abnormally. Further, the path 67 prevents the high-temperature and high-pressure discharged gas refrigerant from flowing back to the receiver 14 via the check valves 75 and 76.

経路６９は、冷媒ボンベ８（図３参照）と経路６３とを接続する経路である。経路６９によって、冷媒ボンベ８より追加冷媒を充填することができる。通常、室外機２には、工場出荷時に標準量の冷媒が予め充填されているが、連絡配管５０・５１が長い場合は、追加充填冷媒量が必要となる。このような場合は、据付時に、冷媒ボンベ８（図３参照）を閉鎖弁４２に接続して、冷媒充填電磁弁３１を開いて経路６９を介して追加冷媒を充填する。
一方、経路６８は、経路６９から、逆止弁７７を介して経路６７に接続される。この経路６８は、冷媒追加充填終了時に経路６９に残留する冷媒が高圧となった場合に経路６７を介して圧縮機１０の吐出側へ逃がすためのものである。 The path 69 is a path that connects the refrigerant cylinder 8 (see FIG. 3) and the path 63. The additional refrigerant can be filled from the refrigerant cylinder 8 by the path 69. Normally, the outdoor unit 2 is pre-filled with a standard amount of refrigerant at the time of shipment from the factory. However, if the connecting pipes 50 and 51 are long, an additional amount of refrigerant is required. In such a case, at the time of installation, the refrigerant cylinder 8 (see FIG. 3) is connected to the closing valve 42, the refrigerant charging electromagnetic valve 31 is opened, and additional refrigerant is charged via the path 69.
On the other hand, the path 68 is connected to the path 67 from the path 69 via the check valve 77. This path 68 is for escaping to the discharge side of the compressor 10 through the path 67 when the refrigerant remaining in the path 69 becomes high pressure at the end of the additional charging of the refrigerant.

経路７０は、オイルタンク１６を介して、吸入ラインである経路６１に並列に接続されている。オイルタンク１６は、ガス冷媒中のコンタミ物質を除去する装置であり、その内部構造は除去形式により様々である。除去方式としては、遠心分離式、バッフル式又は金網式が主流であり、本実施例では、除去形式は特に限定しないとする。
経路７０は、前記経路６１と経路６３との接続部に対し、並列に設けられている。該経路７０は、廃熱回収器１５の出口より閉鎖弁４３を介してオイルタンク１６の上部に接続され、オイルタンク１６上部からはオイルタンク電磁弁３４及び閉鎖弁４５を介して経路６１に接続される。また、オイルタンク１６下部からは、経路７１が、油戻し電磁弁３５を介して前記経路７０に接続されている。ガス冷媒は、オイルタンク１６の上方より内部に流入し、コンタミ物質が除去された後、再度オイルタンク１６の上方より流出する。さらに、下方に落下した冷凍機油は、経路７１によって経路７０に戻されるのである。 The path 70 is connected in parallel to a path 61 that is a suction line via the oil tank 16. The oil tank 16 is a device that removes contaminants in the gas refrigerant, and its internal structure varies depending on the type of removal. As a removal method, a centrifugal separation method, a baffle method, or a wire mesh method is mainly used, and in this embodiment, the removal method is not particularly limited.
The path 70 is provided in parallel to the connection portion between the path 61 and the path 63. The path 70 is connected to the upper part of the oil tank 16 through the closing valve 43 from the outlet of the waste heat recovery unit 15, and is connected to the path 61 through the oil tank electromagnetic valve 34 and the closing valve 45 from the upper part of the oil tank 16. Is done. A path 71 is connected to the path 70 through the oil return solenoid valve 35 from the lower part of the oil tank 16. The gas refrigerant flows into the interior from above the oil tank 16, and after the contaminants are removed, it flows out from above the oil tank 16 again. Further, the refrigerating machine oil falling downward is returned to the path 70 by the path 71.

次に、本発明の実施例である配管洗浄運転について説明する。
最近では、ビル又はマンションでのエンジン駆動式ヒートポンプ１の更新工事の場合、室外機２と室内機３の連絡配管５０・５１は壁面に埋設されていることが多いので、取り替えることなく、既設連絡配管５０．５１がそのまま使用される場合がある。このとき、既設空気調和設備の冷媒と新規エンジン駆動式ヒートポンプ１の冷媒が異なる場合は、冷凍機油も異なり、連絡配管５０・５１内における残留冷凍機油等のコンタミ物質を、洗浄により除去する必要がある。そこで、新規エンジン駆動式ヒートポンプ１設置後に、連絡配管の洗浄運転が必要となるのである。
なお、この配管洗浄運転の際に、必要なら、冷媒充填追加も同時に行なう。連絡配管５０・５１が長い場合は、出荷時に標準量にて予め室外機２に充填されている冷媒量よりも、さらに冷媒を追加充填する必要が生じる。このような場合は、新規エンジン駆動式ヒートポンプ１設置後に、配管洗浄と同時に追加冷媒充填も行なうのである。
これらの現状を踏まえ、既設連絡配管５０・５１を利用して、エンジン駆動式ヒートポンプ１を新規に設置した場合の、配管洗浄運転並びに冷媒追加充填について、以下に説明する。 Next, the pipe cleaning operation which is an embodiment of the present invention will be described.
Recently, when renewing the engine-driven heat pump 1 in a building or condominium, the connecting pipes 50 and 51 of the outdoor unit 2 and the indoor unit 3 are often embedded in the wall surface. The pipe 50.51 may be used as it is. At this time, if the refrigerant of the existing air conditioning equipment and the refrigerant of the new engine-driven heat pump 1 are different, the refrigeration oil is also different, and it is necessary to remove contaminants such as residual refrigeration oil in the communication pipes 50 and 51 by washing. is there. Therefore, after the new engine-driven heat pump 1 is installed, the connecting pipe must be washed.
In addition, at the time of this pipe washing operation, if necessary, the refrigerant filling is also performed. When the communication pipes 50 and 51 are long, it is necessary to further fill the refrigerant with the standard amount at the time of shipment more than the amount of refrigerant that is filled in the outdoor unit 2 in advance. In such a case, after installing the new engine-driven heat pump 1, additional refrigerant filling is performed simultaneously with pipe cleaning.
Based on these current conditions, the pipe cleaning operation and the additional refrigerant charging when the engine-driven heat pump 1 is newly installed using the existing communication pipes 50 and 51 will be described below.

図２及び図５を用いて、室外機２の冷媒をレシーバ１４又は室外熱交換器１２に回収する運転状態について説明する。図２は、この運転状態の冷媒挙動を、太い実線にて表している。また、図５は、電磁弁、電子膨張弁又は閉鎖弁の作動を示している。
この運転は、配管洗浄運転の準備段階であり、その目的は、圧縮機１０を駆動するエンジン（図示なし）冷却水の昇温、及び室外機２の冷媒をレシーバ１４又は室外熱交換器１２に回収することである。通常、工場出荷時に室外機２に予め充填されている標準量の冷媒は、回路内に偏在している場合があるので、洗浄運転前にレシーバ１４又は室外熱交換器１２に回収する運転を行なうのが望ましい。 The operation state which collect | recovers the refrigerant | coolant of the outdoor unit 2 in the receiver 14 or the outdoor heat exchanger 12 is demonstrated using FIG.2 and FIG.5. FIG. 2 represents the refrigerant behavior in this operating state with a thick solid line. FIG. 5 shows the operation of a solenoid valve, an electronic expansion valve, or a closing valve.
This operation is a preparatory stage for the pipe cleaning operation. The purpose of this operation is to raise the temperature of cooling water for an engine (not shown) that drives the compressor 10 and the refrigerant of the outdoor unit 2 to the receiver 14 or the outdoor heat exchanger 12. It is to collect. Usually, the standard amount of refrigerant prefilled in the outdoor unit 2 at the time of shipment from the factory may be unevenly distributed in the circuit, so that the receiver 14 or the outdoor heat exchanger 12 is recovered before the cleaning operation. Is desirable.

図５に示すように、室外機２の冷媒をレシーバ１４又は室外熱交換器１２に回収する運転状態での機器制御について説明する。
この運転状態では、液閉鎖弁４０及びガス閉鎖弁４１は閉じられている。四方弁２０は圧縮機１０の吐出側と室外熱交換器１２を連通する冷房運転と同じ切り換え位置とされる。
また、レシーバ１４に液冷媒を回収するために、レシーバ１４出口の開閉弁は、全て閉じられる。具体的には、充填検知電磁弁３０は閉じられ、廃熱回収器膨張弁２２及び室外熱交換器膨張弁２１は全閉とされる。さらに、バイパス電磁弁３２は閉じられ、バイパス膨張弁２４は全閉とされる。また、閉鎖弁４２及び冷媒充填電磁弁３１も閉じられている。
一方、廃熱回収器連絡用電磁弁３３は開とされ、経路７０上の開閉弁は全て開とされ、閉鎖弁４４は閉とされる。経路７０上の開閉弁とは、閉鎖弁４３・４５、オイルタンク電磁弁３４、及び油戻し電磁弁３５である。この経路７０の機器作動によって、廃熱回収器１５及びオイルタンク１６を並列にする吸入ラインが形成されるのである。
なお、これら、電磁弁、電子膨張弁、及び四方弁の開閉作動又は開度制御は、コントローラ１００によって制御され、閉鎖弁は作業者の手によって開閉作動される（図５参照）。 As shown in FIG. 5, device control in an operation state in which the refrigerant of the outdoor unit 2 is collected in the receiver 14 or the outdoor heat exchanger 12 will be described.
In this operating state, the liquid closing valve 40 and the gas closing valve 41 are closed. The four-way valve 20 is set to the same switching position as the cooling operation in which the discharge side of the compressor 10 and the outdoor heat exchanger 12 are communicated.
Further, in order to collect the liquid refrigerant in the receiver 14, all the on-off valves at the outlet of the receiver 14 are closed. Specifically, the filling detection electromagnetic valve 30 is closed, and the waste heat recovery device expansion valve 22 and the outdoor heat exchanger expansion valve 21 are fully closed. Further, the bypass solenoid valve 32 is closed, and the bypass expansion valve 24 is fully closed. Further, the closing valve 42 and the refrigerant charging electromagnetic valve 31 are also closed.
On the other hand, the waste heat recovery device communication electromagnetic valve 33 is opened, all the on-off valves on the path 70 are opened, and the closing valve 44 is closed. The on-off valves on the path 70 are the closing valves 43 and 45, the oil tank solenoid valve 34, and the oil return solenoid valve 35. By operating the equipment in this path 70, a suction line is formed in which the waste heat recovery unit 15 and the oil tank 16 are arranged in parallel.
The opening / closing operation or opening degree control of the electromagnetic valve, the electronic expansion valve, and the four-way valve is controlled by the controller 100, and the closing valve is opened / closed by the operator's hand (see FIG. 5).

図２の太線で表す冷媒挙動に示すように、この運転状態では、圧縮機１０は、経路６３やガス閉鎖弁４１〜四方弁２０〜廃熱回収器連絡用電磁弁３３の経路に滞留している冷媒を吸入し吐出する。そして、室外熱交換器１２又はレシーバ１４に回収される。このとき、同時に、エンジン冷却水も昇温される。この運転状態は、吐出管温度センサ７にて吐出ガス冷媒温度の上昇等を検知して、室外機２の冷媒をレシーバ１４又は室外熱交換器１２に回収できた頃合に終了する。   As shown in the refrigerant behavior represented by the thick line in FIG. 2, in this operation state, the compressor 10 stays in the path 63 and the path of the gas shut-off valve 41 to the four-way valve 20 to the waste heat recovery device communication electromagnetic valve 33. The refrigerant is sucked and discharged. And it is collect | recovered by the outdoor heat exchanger 12 or the receiver 14. FIG. At the same time, the engine coolant is also heated. This operation state ends when the discharge pipe temperature sensor 7 detects an increase in the temperature of the discharge gas refrigerant and the refrigerant of the outdoor unit 2 can be collected in the receiver 14 or the outdoor heat exchanger 12.

図３及び図５を用いて、液及びガス側連絡配管５０・５１を液冷媒で洗浄する運転状態について説明する。図３は、この運転状態の冷媒挙動を、太い実線にて表している。また、図５は、電磁弁、電子膨張弁又は閉鎖弁の作動を示している。この運転状態での目的は、連絡配管５０・５１の洗浄及び追加冷媒充填である。   An operation state in which the liquid and gas side communication pipes 50 and 51 are washed with the liquid refrigerant will be described with reference to FIGS. 3 and 5. FIG. 3 represents the refrigerant behavior in this operating state with a thick solid line. FIG. 5 shows the operation of a solenoid valve, an electronic expansion valve, or a closing valve. The purpose in this operating state is to clean the connecting pipes 50 and 51 and to charge additional refrigerant.

図５に示すように、液及びガス側連絡配管５０・５１を液冷媒で洗浄する運転状態での機器制御について説明する。
この運転状態では、室内機３へ冷媒を流すため、液閉鎖弁４０及びガス閉鎖弁４１が開とされる。また、室内熱交換器膨張弁２３は全開とされる。さらに、追加冷媒を充填するため、冷媒ボンベ８が閉鎖弁４２に接続されて、閉鎖弁４２及び冷媒充填電磁弁３１が開とされる。さらに、充填検知電磁弁３０も開とされる。 As shown in FIG. 5, the apparatus control in the operation state which wash | cleans the liquid and gas side connection piping 50 * 51 with a liquid refrigerant is demonstrated.
In this operation state, the liquid closing valve 40 and the gas closing valve 41 are opened in order to flow the refrigerant to the indoor unit 3. Moreover, the indoor heat exchanger expansion valve 23 is fully opened. Further, in order to fill the additional refrigerant, the refrigerant cylinder 8 is connected to the closing valve 42, and the closing valve 42 and the refrigerant charging electromagnetic valve 31 are opened. Further, the filling detection electromagnetic valve 30 is also opened.

図３の太線で表す冷媒挙動に示すように、液及びガス側連絡配管５０・５１を液冷媒で洗浄する運転状態では、室外熱交換器１２を凝縮器、廃熱回収器１５を蒸発器とする冷凍サイクルが形成される。特記すべきこととして、室内熱交換器１３は、液冷媒が通過するのみで、室内ファン６は作動せず、熱交換が行なわれない。そのため、液側の連絡配管５０のみならず、ガス側の連絡配管５１にも液冷媒の流動が可能となる。このように、液冷媒にて連絡配管５０・５１から洗浄されたコンタミ物質は、オイルタンク１６によって除去される。
また、追加充填冷媒は、外部より設置される冷媒ボンベ８より、経路６９を介して廃熱回収器１５の上流側から圧縮機１０に吸引される。
なお、液及びガス側連絡配管５０・５１を液冷媒で洗浄する運転状態は、通常タイマなどによる終了とする。なお、冷媒充填終了については、本実施例では説明を省略する。 As shown in the refrigerant behavior represented by the thick line in FIG. 3, in the operation state in which the liquid and gas side communication pipes 50 and 51 are washed with liquid refrigerant, the outdoor heat exchanger 12 is a condenser, and the waste heat recovery unit 15 is an evaporator. A refrigeration cycle is formed. It should be noted that in the indoor heat exchanger 13, only the liquid refrigerant passes, the indoor fan 6 does not operate, and heat exchange is not performed. Therefore, the liquid refrigerant can flow not only in the liquid side communication pipe 50 but also in the gas side communication pipe 51. In this way, contaminant substances washed from the communication pipes 50 and 51 with the liquid refrigerant are removed by the oil tank 16.
Further, the additional charging refrigerant is sucked into the compressor 10 from the upstream side of the waste heat recovery unit 15 via the path 69 from the refrigerant cylinder 8 installed from the outside.
The operation state in which the liquid and gas side communication pipes 50 and 51 are washed with the liquid refrigerant is normally terminated by a timer or the like. In addition, about completion | finish of refrigerant | coolant filling, description is abbreviate | omitted in a present Example.

連絡配管５０・５１内部は、液冷媒の通過により洗浄される。液冷媒は、比体積も小さく非圧縮性であり、配管内壁に十分密着しながら流動するため、ガス冷媒より洗浄能力が高い。
本実施例では、室内熱交換器１３を熱交換器として機能させず、廃熱回収器１５を蒸発器として冷房運転時と同じ冷媒循環を行ない、連絡配管５０・５１に液冷媒を流入させることで、洗浄能力の高い配管洗浄運転を実現している。 The inside of the communication pipes 50 and 51 is cleaned by the passage of the liquid refrigerant. The liquid refrigerant has a small specific volume, is incompressible, and flows while sufficiently adhering to the inner wall of the pipe.
In this embodiment, the indoor heat exchanger 13 is not functioned as a heat exchanger, the waste heat recovery unit 15 is used as an evaporator, the same refrigerant circulation as in the cooling operation is performed, and the liquid refrigerant is allowed to flow into the connecting pipes 50 and 51. The pipe cleaning operation with high cleaning capability is realized.

図４及び図５を用いて、ガス側連絡配管５１の冷媒を圧縮機１０で吸引する運転状態について説明する。図４は、この運転状態の冷媒挙動を、太い実線にて表している。また、図５は、電磁弁、電子膨張弁又は閉鎖弁の作動を示している。この運転状態での目的は、既設ガス側連絡配管５１の一層の洗浄である。   An operation state in which the refrigerant in the gas side communication pipe 51 is sucked by the compressor 10 will be described with reference to FIGS. 4 and 5. FIG. 4 represents the refrigerant behavior in this operating state with a thick solid line. FIG. 5 shows the operation of a solenoid valve, an electronic expansion valve, or a closing valve. The purpose in this operating state is to further clean the existing gas side communication pipe 51.

図５に示すように、ガス側連絡配管５１の冷媒を圧縮機１０で吸引する運転状態での機器制御について説明する。
この運転状態では、冷媒追加充填は行なわないため、閉鎖弁４２及び冷媒充填電磁弁３１は閉とされる。さらに、充填検知電磁弁３０も閉とされる。さらに、室内熱交換器膨張弁２３は全閉とされる。 As shown in FIG. 5, device control in an operation state in which the refrigerant in the gas side communication pipe 51 is sucked by the compressor 10 will be described.
In this operation state, the refrigerant additional charging is not performed, so that the closing valve 42 and the refrigerant charging electromagnetic valve 31 are closed. Further, the filling detection electromagnetic valve 30 is also closed. Furthermore, the indoor heat exchanger expansion valve 23 is fully closed.

図４の太線で表す冷媒挙動に示すように、ガス側連絡配管５１の冷媒を圧縮機１０で吸引する運転状態では、圧縮機１０によって、ガス側連絡配管５１の冷媒を吸入・吐出し、レシーバ１４又は室外熱交換器１２に回収する。このとき、ガス側連絡配管５１内部では、圧力が急激に低下し、配管内に滞留している冷媒は、廃熱回収器１５を介して急激に圧縮機１０に吸引される。この冷媒流動により、さらに、ガス側連絡配管５１の洗浄がなされるのである。そして、ガス側連絡配管５１から洗浄されるコンタミ物質は、液及びガス側連絡配管５０・５１を液冷媒で洗浄する運転状態同様に、オイルタンク１６によって除去される。
つまり、ガス側連絡配管５１は、液及びガス側連絡配管５０・５１を液冷媒で洗浄する運転状態にて洗浄されるだけではなく、ガス側連絡配管５１の冷媒を圧縮機１０で吸引する運転状態において、さらに洗浄されるのである。
また、この運転状態は、吐出管温度センサ７にて吐出ガス冷媒温度の上昇等を検知して、ガス側連絡配管５１の冷媒をレシーバ１４又は室外熱交換器１２に回収できた頃合に終了する。 As shown in the refrigerant behavior represented by the thick line in FIG. 4, in the operation state where the refrigerant in the gas side communication pipe 51 is sucked by the compressor 10, the compressor 10 sucks and discharges the refrigerant in the gas side communication pipe 51, and receives the receiver. 14 or the outdoor heat exchanger 12. At this time, in the gas side communication pipe 51, the pressure rapidly decreases, and the refrigerant staying in the pipe is rapidly sucked into the compressor 10 through the waste heat recovery unit 15. This refrigerant flow further cleans the gas side communication pipe 51. Contaminant substances to be washed from the gas side communication pipe 51 are removed by the oil tank 16 in the same manner as in the operation state in which the liquid and the gas side communication pipes 50 and 51 are washed with the liquid refrigerant.
In other words, the gas side communication pipe 51 is not only cleaned in the operation state in which the liquid and gas side connection pipes 50 and 51 are cleaned with the liquid refrigerant, but is also operated to suck the refrigerant in the gas side communication pipe 51 with the compressor 10. In the state, it is further washed.
Further, this operation state ends when the discharge pipe temperature sensor 7 detects an increase in the temperature of the discharge gas refrigerant and the refrigerant in the gas side communication pipe 51 can be collected in the receiver 14 or the outdoor heat exchanger 12. .

本発明の実施例に係るエンジン駆動式ヒートポンプの全体的な構成を示した冷媒回路図。The refrigerant circuit figure which showed the whole structure of the engine drive type heat pump which concerns on the Example of this invention. 室外機の冷媒をレシーバ又は室外熱交換器に回収する運転状態の冷媒挙動を示す冷媒回路図。The refrigerant circuit figure which shows the refrigerant | coolant behavior of the driving | running state which collect | recovers the refrigerant | coolant of an outdoor unit to a receiver or an outdoor heat exchanger. 液及びガス側連絡配管を液冷媒で洗浄する運転状態の冷媒挙動を示す冷媒回路図。The refrigerant circuit figure which shows the refrigerant | coolant behavior of the driving | running state which wash | cleans a liquid and gas side connection piping with a liquid refrigerant. ガス側連絡配管の冷媒を圧縮機で吸引する運転状態の冷媒挙動を示す冷媒回路図。The refrigerant circuit figure which shows the refrigerant | coolant behavior of the driving | running state which attracts | sucks the refrigerant | coolant of gas side connection piping with a compressor. 配管洗浄運転の各運転状態での機器動作を示す図。The figure which shows the apparatus operation | movement in each driving | running state of piping washing driving | operation.

符号の説明Explanation of symbols

１ エンジン駆動式ヒートポンプ
２ 室外機
３ 室内機
１０ 圧縮機
２３ 室内熱交換器膨張弁
４０ 閉鎖弁
４１ 閉鎖弁
５０ 液側連絡配管
５１ ガス側連絡配 DESCRIPTION OF SYMBOLS 1 Engine drive type heat pump 2 Outdoor unit 3 Indoor unit 10 Compressor 23 Indoor heat exchanger expansion valve 40 Closing valve 41 Closing valve 50 Liquid side communication piping 51 Gas side communication distribution

Claims (2)

エンジン駆動による圧縮機と、
室外熱交換器と、
高圧の液冷媒を貯留するレシーバと、
前記エンジンの廃熱により冷媒を蒸発させる廃熱回収器と、
を有する室外機と、
個々に膨張弁を有する複数の室内機と、
前記複数の室内機と室外機とを接続すると共にその経路上に前記複数の室内機と室外機との連通を制御する開閉手段を有する連絡配管と、
より構成されるエンジン駆動式ヒートポンプにおいて、
前記開閉手段が閉状態で室外機の冷媒を前記レシーバ又は室外熱交換器に回収する運転モードと、
前記開閉手段が開状態で全室内機の膨張弁を全開にして冷房運転時と同じ経路で冷媒を循環して前記廃熱回収器で冷媒蒸発を行なう運転モードと、
前記開閉手段が開状態で全室内機の膨張弁を全閉にして前記連絡配管のガス側配管内の冷媒を吸引して前記廃熱回収器で冷媒蒸発を行なう運転モードと、
を備えることを特徴とするエンジン駆動式ヒートポンプ。 An engine driven compressor;
An outdoor heat exchanger,
A receiver for storing high-pressure liquid refrigerant;
A waste heat recovery device for evaporating the refrigerant by the waste heat of the engine;
An outdoor unit having
A plurality of indoor units each having an expansion valve;
A connecting pipe having an opening and closing means for connecting the plurality of indoor units and the outdoor unit and controlling communication between the plurality of indoor units and the outdoor unit on the path;
In an engine-driven heat pump composed of
An operation mode in which the refrigerant of the outdoor unit is collected in the receiver or the outdoor heat exchanger when the opening / closing means is closed,
An operation mode in which the expansion valve of all indoor units is fully opened when the opening and closing means is open, the refrigerant is circulated through the same path as in the cooling operation, and the refrigerant is evaporated in the waste heat recovery unit;
An operation mode in which the expansion valve of all indoor units is fully closed while the opening and closing means is open, and the refrigerant in the gas side pipe of the communication pipe is sucked to evaporate the refrigerant in the waste heat recovery unit;
An engine-driven heat pump comprising: 請求項１記載のエンジン駆動式ヒートポンプの運転方法において、
最初に、前記開閉手段が閉状態で室外機の冷媒を前記レシーバ又は室外熱交換器に回収する運転を行ない、
続いて、前記開閉手段が開状態で全室内機の膨張弁を全開にして冷房運転時と同じ経路で冷媒を循環して前記廃熱回収器で冷媒蒸発を行なう運転を行ない、
最後に、前記開閉手段が開状態で全室内機の膨張弁を全閉にして前記連絡配管のガス側配管内の冷媒を吸引して前記廃熱回収器で冷媒蒸発を行なう運転を行なう、
ことを特徴とするエンジン駆動式ヒートポンプの運転方法。 The operation method of the engine-driven heat pump according to claim 1,
First, the operation of collecting the refrigerant of the outdoor unit in the receiver or the outdoor heat exchanger with the opening and closing means closed,
Subsequently, with the opening / closing means in the open state, the expansion valves of all the indoor units are fully opened, the refrigerant is circulated through the same path as in the cooling operation, and the refrigerant is evaporated in the waste heat recovery unit,
Finally, with the opening and closing means open, the expansion valves of all indoor units are fully closed, the refrigerant in the gas side pipe of the communication pipe is sucked, and the refrigerant is evaporated in the waste heat recovery unit.
An operation method for an engine-driven heat pump.
JP2005320110A 2005-11-02 2005-11-02 Engine-driven heat pump having an operation mode for cleaning the connecting pipe between the outdoor unit and the indoor unit, and its operation method Expired - Fee Related JP4605784B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005320110A JP4605784B2 (en) 2005-11-02 2005-11-02 Engine-driven heat pump having an operation mode for cleaning the connecting pipe between the outdoor unit and the indoor unit, and its operation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005320110A JP4605784B2 (en) 2005-11-02 2005-11-02 Engine-driven heat pump having an operation mode for cleaning the connecting pipe between the outdoor unit and the indoor unit, and its operation method

Publications (2)

Publication Number Publication Date
JP2007127325A JP2007127325A (en) 2007-05-24
JP4605784B2 true JP4605784B2 (en) 2011-01-05

Family

ID=38150124

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005320110A Expired - Fee Related JP4605784B2 (en) 2005-11-02 2005-11-02 Engine-driven heat pump having an operation mode for cleaning the connecting pipe between the outdoor unit and the indoor unit, and its operation method

Country Status (1)

Country Link
JP (1) JP4605784B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012225549A (en) * 2011-04-18 2012-11-15 Mitsubishi Electric Corp Refrigeration cycle apparatus
JP6335106B2 (en) 2014-11-21 2018-05-30 ヤンマー株式会社 heat pump
JP6618430B2 (en) * 2015-06-16 2019-12-11 大阪瓦斯株式会社 Inspection method for heat pump system
JP7164822B2 (en) 2018-09-28 2022-11-02 ダイキン工業株式会社 Refrigerant charging method
EP3816542A1 (en) 2019-10-29 2021-05-05 Daikin Industries, Ltd. Refrigerant system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002267294A (en) * 2001-03-05 2002-09-18 Mitsubishi Electric Corp Refrigerant circuit switching device for refrigeration cycle device
JP2004069101A (en) * 2002-08-02 2004-03-04 Yanmar Co Ltd Accumulator, air conditioning equipment with accumulator, and its operating method
JP2004211944A (en) * 2002-12-27 2004-07-29 Sanyo Electric Co Ltd Oil recovery method for air conditioner, and air conditioner
JP2004218931A (en) * 2003-01-15 2004-08-05 Sanyo Electric Co Ltd Air conditioner pipe cleaning method and air conditioner
JP2004219016A (en) * 2003-01-17 2004-08-05 Yanmar Co Ltd Air conditioning system
JP2004293986A (en) * 2003-03-27 2004-10-21 Mitsubishi Electric Corp Washing method for connection pipe and updating method for refrigerator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002267294A (en) * 2001-03-05 2002-09-18 Mitsubishi Electric Corp Refrigerant circuit switching device for refrigeration cycle device
JP2004069101A (en) * 2002-08-02 2004-03-04 Yanmar Co Ltd Accumulator, air conditioning equipment with accumulator, and its operating method
JP2004211944A (en) * 2002-12-27 2004-07-29 Sanyo Electric Co Ltd Oil recovery method for air conditioner, and air conditioner
JP2004218931A (en) * 2003-01-15 2004-08-05 Sanyo Electric Co Ltd Air conditioner pipe cleaning method and air conditioner
JP2004219016A (en) * 2003-01-17 2004-08-05 Yanmar Co Ltd Air conditioning system
JP2004293986A (en) * 2003-03-27 2004-10-21 Mitsubishi Electric Corp Washing method for connection pipe and updating method for refrigerator

Also Published As

Publication number Publication date
JP2007127325A (en) 2007-05-24

Similar Documents

Publication Publication Date Title
KR101639798B1 (en) Cleaning Equipment for pipes of refrigerator in air-conditioner and Cleaning method using the same
JP4120221B2 (en) Refrigerant and oil recovery operation method, and refrigerant and oil recovery control device
AU2004264485B2 (en) Refrigeration system
JP4605784B2 (en) Engine-driven heat pump having an operation mode for cleaning the connecting pipe between the outdoor unit and the indoor unit, and its operation method
JP2004205109A (en) Pipe washing method for air conditioning equipment, its device and system and control device for pipe washing system
JP4110818B2 (en) Refrigeration equipment
JP4052478B2 (en) Refrigerator oil separation and recovery system and cleaning method for air conditioning system
JP2004263885A (en) Method for cleaning refrigerant piping, method for updating air conditioner, and air conditioner
JP2001201215A (en) Refrigerator oil removal method and refrigerator oil removal device
JP2004270974A (en) Method for changing refrigerant in refrigerant circuit for freezing and refrigerating device
EP1521049A1 (en) Refrigeration apparatus
JP3885601B2 (en) Refrigerant and oil recovery method, refrigerant and oil recovery control device, and air conditioner
JP3863827B2 (en) Air conditioner and operation method of air conditioner
JP4186764B2 (en) Refrigeration equipment
JP2004333121A5 (en)
JP2004333121A (en) Update method of air conditioner and air conditioner
JP2004218931A (en) Air conditioner pipe cleaning method and air conditioner
JP2004219016A (en) Air conditioning system
JP3704608B2 (en) Piping cleaning method, piping cleaning device and refrigeration equipment
JP2007085643A (en) Cleaning method for air conditioning system, and outdoor unit used therein
JP3700723B2 (en) Refrigeration equipment
JP4281734B2 (en) Refrigeration equipment
JP2005061830A (en) Using method for existing refrigerant piping
JP2007127328A (en) Waste heat recovering unit communication path of engine drive type heat pump
JP4097520B2 (en) Pipe cleaning method and pipe cleaning system for air conditioner

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20071128

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100928

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20101004

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131015

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131015

Year of fee payment: 3

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131015

Year of fee payment: 3

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

LAPS Cancellation because of no payment of annual fees