JP2007232244A - Replacement kit for cleaning piping, its use method, and refrigerating cycle device - Google Patents

Replacement kit for cleaning piping, its use method, and refrigerating cycle device Download PDF

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JP2007232244A
JP2007232244A JP2006051940A JP2006051940A JP2007232244A JP 2007232244 A JP2007232244 A JP 2007232244A JP 2006051940 A JP2006051940 A JP 2006051940A JP 2006051940 A JP2006051940 A JP 2006051940A JP 2007232244 A JP2007232244 A JP 2007232244A
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refrigerant
side unit
unit
heat source
pipe
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Yusuke Otsubo
祐介 大坪
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To recycle a piping cleaning device used in cleaning existing piping, as a supercooling heat exchanger as it is even when an installation place of a condensing unit is narrow. <P>SOLUTION: The replacement kit 100 is disposed between a heat source-side unit 1 and an use-side unit 2 which constitute a refrigerating cycle device, and used for removing foreign matters remaining in refrigerant pipes 3, 4 connecting between the units. In the replacement kit 100, the refrigerant flowing from the heat source-side unit 1 to the use-side unit has gas-liquid two phases in cleaning the piping, and the replacement kit has a refrigerant state adjusting portion 101 having the supercooling refrigerant-refrigerant heat exchanger 15 in a cooling operation, and a foreign matter collecting container portion 102 having a foreign matter collecting container 17 constituting a part of a flow channel of the refrigerant flowing from the use-side unit 2 to the heat source-side unit 1. The refrigerant state adjusting portion 101 and the foreign matter collecting container portion 102 are composed of housings independent from each other, and the foreign matter collecting container portion 102 is detachable from the refrigerant state adjusting portion 101. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、冷凍装置や空調装置などの冷凍サイクル装置に関するものであり、特に冷凍サイクル装置における既設配管の洗浄装置及びその利用方法に関する。   The present invention relates to a refrigeration cycle apparatus such as a refrigeration apparatus or an air conditioner, and more particularly to a cleaning device for existing piping in the refrigeration cycle apparatus and a method of using the same.

ＣＦＣ及びＨＣＦＣ冷媒を用いた冷凍機で使用されてきた既設配管を洗浄する方法として、ＨＦＣ等の新冷媒を洗浄媒体とし、新冷媒対応の熱源側ユニットを洗浄媒体搬送手段として、高低圧熱交換器、減圧装置、分離装置などから成る洗浄装置により、冷媒を気液二相状態とした後に配管内を循環させ、洗浄する方法が知られている（例えば、特許文献１参照）。
特開２００１−１４１３４０号公報（第４−８頁、第１図〜第６図） As a method of cleaning existing pipes that have been used in refrigerators using CFC and HCFC refrigerants, high-low pressure heat exchange is performed using a new refrigerant such as HFC as a cleaning medium and a heat source side unit corresponding to the new refrigerant as a cleaning medium conveying means. A method is known in which a refrigerant is circulated in a pipe and washed after the refrigerant is brought into a gas-liquid two-phase state by a washing device including a vacuum vessel, a decompression device, a separation device, and the like (for example, see Patent Document 1).
JP 2001-141340 A (page 4-8, FIGS. 1 to 6)

例えばＲ２２などのＨＣＦＣ冷媒で使用されてきた既設配管を、洗浄し、Ｒ４０４Ａなどの新冷媒システムで再利用する場合、Ｒ４０４ＡはＲ２２に比べ冷媒特性上、冷媒循環量が大きいため、延長配管中での圧力損失が過大となる。また、現地において再利用対象となる液管径が、新コンデンシングユニット（新熱源側ユニット）の液管径よりも細い場合には、圧力損失が更に大きくなる。この場合、液延長配管中でフラッシュガス（気泡）が発生し、絞り装置の作動状態が不安定となり、負荷側の冷えが悪くなる事がある。
上記課題に対しては、洗浄に使用した洗浄装置内の熱交換器を過冷却熱交換器として再利用することで対処することが考えられる。しかしながら、現場の状況によっては、洗浄装置を再利用するために設置するスペースが無い場合も多く、その場合には、洗浄装置内の熱交換器を過冷却熱交換器として再利用することができなかった。 For example, when existing pipes that have been used with HCFC refrigerants such as R22 are washed and reused in new refrigerant systems such as R404A, R404A has a larger refrigerant circulation rate than R22, so it is in an extended pipe. The pressure loss is excessive. Further, when the liquid pipe diameter to be reused locally is smaller than the liquid pipe diameter of the new condensing unit (new heat source side unit), the pressure loss is further increased. In this case, flash gas (bubbles) is generated in the liquid extension pipe, the operation state of the expansion device becomes unstable, and the cooling on the load side may deteriorate.
It is conceivable to deal with the above problem by reusing the heat exchanger in the cleaning device used for cleaning as a supercooling heat exchanger. However, there are many cases where there is no space for reusing the cleaning device depending on the situation at the site, and in that case, the heat exchanger in the cleaning device can be reused as a supercooling heat exchanger. There wasn't.

この発明は、上記のような課題に対処するためになされたもので、コンデンシングユニットの据付場所が狭い場合においても、既設配管の洗浄に使用した配管洗浄装置を、そのまま過冷却熱交換器として再利用できるリプレースキット及びその使用方法などを提案するものである。   The present invention has been made to address the above-described problems. Even when the installation location of the condensing unit is small, the pipe cleaning apparatus used for cleaning the existing pipe is used as a supercooling heat exchanger as it is. It proposes a replacement kit that can be reused and how to use it.

この発明は、冷凍サイクル装置を構成する熱源側ユニットと利用側ユニットとの間に配置されて、各ユニット間を接続する冷媒配管に残留した異物の除去に供される配管洗浄用のリプレースキットであって、前記リプレースキットは、前記熱源側ユニットから前記利用側ユニットへ向かう冷媒を、配管洗浄時には気液二相にし、冷却運転時には過冷却する冷媒−冷媒熱交換器を有した冷媒状態調整部と、前記利用側ユニットから前記熱源側ユニットへ戻る前記冷媒の流路の一部を構成する異物回収容器を有した異物回収容器部とを備えてなり、前記冷媒状態調整部と前記異物回収容器部とを別々の筐体から構成して、前記異物回収容器部を前記冷媒状態調整部から取り外し可能としたものである。   The present invention is a replacement kit for pipe cleaning that is disposed between a heat source side unit and a use side unit constituting a refrigeration cycle apparatus, and is used for removing foreign matters remaining in a refrigerant pipe connecting the units. The replacement kit includes a refrigerant state adjusting unit having a refrigerant-refrigerant heat exchanger that converts the refrigerant from the heat source side unit to the utilization side unit into a gas-liquid two-phase during pipe cleaning and supercooling during cooling operation. And a foreign matter recovery container part having a foreign matter recovery container that constitutes a part of the refrigerant flow path returning from the use side unit to the heat source side unit, and the refrigerant state adjusting part and the foreign matter recovery container The foreign matter collecting container part is configured to be removable from the refrigerant state adjusting part.

この発明のリプレースキットは、熱源側ユニットと利用側ユニットとを繋ぐ冷媒配管（既設の液配管及びガス配管）の洗浄装置として利用した後、冷凍サイクル装置の過冷却装置としてそのまま使用することができる。その場合、洗浄対象とした液配管が新コンデンシングユニットの液管径よりも小さい場合においても、冷媒−冷媒熱交換器の作用によりフラッシュガスの発生を抑えることができ、液管径が同等の場合には、過冷却分のエンタルピ増加により冷凍能力の向上が図れる。しかも、異物回収容器部を冷媒状態調整部に対して取り外しできるので、配管洗浄後には冷媒状態調整部だけのスペースを確保すればよい。また、取り外された異物回収容器部の再利用も可能となる。   The replacement kit of the present invention can be used as a supercooling device for a refrigeration cycle device after being used as a cleaning device for refrigerant piping (existing liquid piping and gas piping) connecting the heat source side unit and the usage side unit. . In that case, even when the liquid pipe to be cleaned is smaller than the liquid pipe diameter of the new condensing unit, the generation of flash gas can be suppressed by the action of the refrigerant-refrigerant heat exchanger, and the liquid pipe diameter is the same. In this case, the refrigerating capacity can be improved by increasing the enthalpy of the supercooled portion. In addition, since the foreign matter collection container part can be removed from the refrigerant state adjusting part, it is sufficient to secure a space only for the refrigerant state adjusting part after pipe cleaning. In addition, the removed foreign matter collection container can be reused.

図１はこの発明の配管洗浄用のリプレースキットが適用される公知の冷凍サイクル装置の一例を示す構成図である。図１に示すように、冷凍サイクル装置の熱源側ユニット（コンデンシングユニット）１には、圧縮機５、凝縮器６、レシーバ（受液器）７及びアキュムレータ８が連結された冷媒回路が形成されている。また、熱源側ユニット１の冷媒の出入口流路には、各流路を開閉するバルブ１２，１３が設けられている。
一方、冷凍サイクル装置の利用側ユニット２は、例えば１以上のショーケースからなり（この例ではショーケース２ａが３個、ショーケース２ｂが４個あるものとする）、それぞれのショーケース２ａ，２ｂには、液電磁弁９、膨張弁１０及び蒸発器１１からなる冷却ユニットが組み込まれている。
なお、図１の利用側ユニット２は、１つのショーケース２ａに３つの冷却ユニットが組み込まれていて、１つのショーケース２ｂに４つの冷却ユニットが組み込まれている、とみなすこともできる。 FIG. 1 is a block diagram showing an example of a known refrigeration cycle apparatus to which a pipe cleaning replacement kit of the present invention is applied. As shown in FIG. 1, a refrigerant circuit in which a compressor 5, a condenser 6, a receiver (liquid receiver) 7 and an accumulator 8 are connected is formed in the heat source side unit (condensing unit) 1 of the refrigeration cycle apparatus. ing. Further, valves 12 and 13 for opening and closing the respective channels are provided in the refrigerant inlet / outlet channels of the heat source side unit 1.
On the other hand, the use side unit 2 of the refrigeration cycle apparatus includes, for example, one or more showcases (in this example, there are three showcases 2a and four showcases 2b), and each showcase 2a, 2b. A cooling unit composed of a liquid electromagnetic valve 9, an expansion valve 10 and an evaporator 11 is incorporated.
1 can be considered that three cooling units are incorporated in one showcase 2a and four cooling units are incorporated in one showcase 2b.

熱源側ユニット１と利用側ユニット２は、開閉弁１２に接続された液管３を介して、また開閉弁１３に接続されたガス管４を介して互いに連通しており、液管３が利用側ユニット２の冷媒入口側に接続され、ガス管４が利用側ユニット２の冷媒出口側に接続されている。
なお、この冷凍サイクル装置の作動冷媒は、Ｒ１２、Ｒ２２などのＣＦＣ、ＨＣＦＣ冷媒であり、冷凍機油には鉱油が用いられているものとする。 The heat source side unit 1 and the use side unit 2 communicate with each other via a liquid pipe 3 connected to the on-off valve 12 and a gas pipe 4 connected to the on-off valve 13. Connected to the refrigerant inlet side of the side unit 2, and the gas pipe 4 is connected to the refrigerant outlet side of the usage side unit 2.
Note that the working refrigerant of this refrigeration cycle apparatus is a CFC or HCFC refrigerant such as R12 and R22, and mineral oil is used as the refrigerating machine oil.

上記冷凍サイクル装置は、通常冷却運転時、次のような動作を行う。圧縮機５で圧縮された高温高圧のガス冷媒は、凝縮器６で外気に放熱して凝縮する。凝縮した高圧液冷媒は、レシーバ７に貯留されるとともに、液管３を通って利用側ユニット２へと流れる。利用側ユニット２においては、開放された液電磁弁９を通過し、膨張弁１０により減圧され、低圧二相冷媒となる。この低圧二相冷媒は、蒸発器１１により利用側の冷却負荷から吸熱してショーケース内を冷却する。そして、蒸発器１１を出た冷媒は低圧ガス冷媒となって、ガス管４及びアキュムレータ８を通り、再び圧縮機５に吸入される。   The refrigeration cycle apparatus performs the following operation during normal cooling operation. The high-temperature and high-pressure gas refrigerant compressed by the compressor 5 dissipates heat to the outside air and is condensed by the condenser 6. The condensed high-pressure liquid refrigerant is stored in the receiver 7 and flows to the use side unit 2 through the liquid pipe 3. In the use side unit 2, it passes through the opened liquid electromagnetic valve 9, is decompressed by the expansion valve 10, and becomes a low-pressure two-phase refrigerant. This low-pressure two-phase refrigerant absorbs heat from the cooling load on the use side by the evaporator 11 and cools the inside of the showcase. Then, the refrigerant exiting the evaporator 11 becomes low-pressure gas refrigerant, passes through the gas pipe 4 and the accumulator 8, and is sucked into the compressor 5 again.

この場合において、作動冷媒Ｒ１２またはＲ２２と潤滑油である鉱油は相溶性があるため、液管３内では互いに溶解した状態で、すなわち冷媒と油は同じ速度で流動する。これに対して、蒸発器１１及びガス管４内においては、冷媒はガス状態であるため、鉱油は分離し、配管壁に付着して冷媒よりゆっくりと流動し、蒸発器１１及びガス管４には相当量の鉱油が滞留している。従って、液管３及びガス管４などの既設配管をそのまま利用して、熱源側ユニット１と利用側ユニット２とを、新たな冷媒及び冷凍機油を用いるものに交換する際には、ガス管４内に残留する異物を、以下に説明する本発明に係るリプレースキットを利用して除去する。   In this case, since the working refrigerant R12 or R22 and the mineral oil that is the lubricating oil are compatible with each other, the refrigerant and the oil flow in the liquid pipe 3 in a dissolved state, that is, at the same speed. On the other hand, in the evaporator 11 and the gas pipe 4, since the refrigerant is in a gas state, the mineral oil is separated, adheres to the pipe wall and flows more slowly than the refrigerant, and enters the evaporator 11 and the gas pipe 4. A substantial amount of mineral oil is retained. Therefore, when the existing pipes such as the liquid pipe 3 and the gas pipe 4 are used as they are, and the heat source side unit 1 and the usage side unit 2 are replaced with those using new refrigerant and refrigerating machine oil, the gas pipe 4 The foreign matter remaining in the inside is removed by using a replacement kit according to the present invention described below.

実施の形態１
図２は図１の冷凍サイクル装置に本発明の実施の形態１に係るリプレースキットを適用した構成図である。図２に示すように、実施の形態１に示すリプレースキット１００は、冷媒状態調整部１０１と異物回収容器部１０２とを有し、熱源側ユニット１と利用側ユニット２との間に配置される。この場合の「熱源側ユニット１と利用側ユニット２との間に配置される」とは、冷凍サイクル装置の冷媒回路からみて、熱源側ユニット１と利用側ユニット２との間に配置されることを意味している。なお、図３に示すように、リプレースキット１００を構成する筐体は、通常は熱源側ユニット１を構成する筐体の近傍に設置される。
このリプレースキット１００は、基本的には、冷媒同士で熱交換を行う冷媒−冷媒熱交換器１５を有した冷媒状態調整部１０１と、既設配管から取り除かれた異物を回収する異物回収容器１７を有した異物回収容器部１０２とからなる。さらに、冷媒状態調整部１０１と異物回収容器部１０２をそれぞれ別々の筐体から構成して、異物回収容器部１０２を冷媒状態調整部１０１から取り外し可能としている。 Embodiment 1
FIG. 2 is a configuration diagram in which the replacement kit according to Embodiment 1 of the present invention is applied to the refrigeration cycle apparatus of FIG. As shown in FIG. 2, the replacement kit 100 shown in the first embodiment includes a refrigerant state adjustment unit 101 and a foreign matter collection container unit 102 and is disposed between the heat source side unit 1 and the use side unit 2. . In this case, “arranged between the heat source side unit 1 and the usage side unit 2” means that it is positioned between the heat source side unit 1 and the usage side unit 2 when viewed from the refrigerant circuit of the refrigeration cycle apparatus. Means. As shown in FIG. 3, the casing that constitutes the replacement kit 100 is normally installed in the vicinity of the casing that constitutes the heat source unit 1.
This replacement kit 100 basically includes a refrigerant state adjustment unit 101 having a refrigerant-refrigerant heat exchanger 15 that exchanges heat between refrigerants, and a foreign matter collection container 17 that collects foreign matters removed from existing piping. The foreign matter collection container 102 is provided. Furthermore, the refrigerant state adjustment unit 101 and the foreign matter collection container unit 102 are configured from separate cases, respectively, so that the foreign matter collection container unit 102 can be detached from the refrigerant state adjustment unit 101.

冷媒−冷媒熱交換器１５は、熱源側ユニット１から液管３を介して利用側ユニット２のショーケース２ａ，２ｂの冷媒入口側へ流れる高圧冷媒と、利用側ユニット２のショーケース２ａ，２ｂの出口側から、ガス管４及び減圧装置１６を介して熱源側ユニット２へ戻る戻り低圧冷媒との間で熱交換を行う。これに加えて、冷媒−冷媒熱交換器１５は、開閉弁１８，１９の切換により、熱源側ユニット１から利用側ユニット２へ向かう高圧冷媒と、冷媒−冷媒熱交換器１５を出て利用側ユニット２へ向かう冷媒を分岐して減圧した分岐減圧冷媒との間での熱交換も可能となるように配置されている。これにより、冷媒−冷媒熱交換器１５は、熱源側ユニット１から利用側ユニット２へ流れる冷媒の状態を調整する作用を果たしている。   The refrigerant-refrigerant heat exchanger 15 includes a high-pressure refrigerant that flows from the heat source side unit 1 through the liquid pipe 3 to the refrigerant inlet side of the showcases 2a and 2b of the usage side unit 2, and the showcases 2a and 2b of the usage side unit 2. The heat exchange is performed with the low-pressure refrigerant returning from the outlet side to the heat source side unit 2 via the gas pipe 4 and the decompression device 16. In addition to this, the refrigerant-refrigerant heat exchanger 15 is switched from the heat source side unit 1 to the user side unit 2 and the refrigerant-refrigerant heat exchanger 15 by switching the on-off valves 18, 19, and the refrigerant-refrigerant heat exchanger 15. It arrange | positions so that the heat exchange between the branch pressure reduction refrigerant | coolants which branched and depressurized the refrigerant | coolant which goes to the unit 2 is also attained. Thereby, the refrigerant-refrigerant heat exchanger 15 has an effect of adjusting the state of the refrigerant flowing from the heat source side unit 1 to the usage side unit 2.

さらに、リプレースキット１００を使用して配管の洗浄を行う際には、利用側ユニット２にバイパス配管２４ａ，２４ｂが追加される。このバイパス配管２４ａ，２４ｂは、熱源側ユニット１から利用側ユニット２へ送られた冷媒が、ショーケース２ａ，２ｂの蒸発器１１を含む冷却ユニットを通過することなしに、ショーケース２ａ，２ｂの全ての冷媒入口と全ての冷媒出口を通るように配管されており、該バイパス配管２４ａ，２４ｂの途中には、その配管を開閉する開閉弁２５ａ，２５ｂが設けられている。   Furthermore, when the replacement kit 100 is used to clean the pipe, bypass pipes 24 a and 24 b are added to the use side unit 2. The bypass pipes 24a and 24b allow the refrigerant sent from the heat source side unit 1 to the use side unit 2 without passing through the cooling unit including the evaporator 11 of the showcases 2a and 2b. Pipes are provided so as to pass through all the refrigerant inlets and all the refrigerant outlets, and on-off valves 25a and 25b for opening and closing the pipes are provided in the middle of the bypass pipes 24a and 24b.

冷媒状態調整部１０１は冷媒−冷媒熱交換器１５を中心に構成されている。そこでは、冷媒−冷媒熱交換器１５の一方の流路（高圧側流路）の両端は、熱源側ユニット１の開閉弁１２と液管３とにそれぞれ連通している。また、冷媒−冷媒熱交換器１５の他方の流路（低圧側流路）は、その一端が減圧装置１６及び開閉弁１９を介してガス管４に連通するとともに、減圧装置１６及び開閉弁１８を介して、冷媒−冷媒熱交換器１５の高圧側流路の出口側に連通しており、その他端（低圧側流路の他端）が異物回収容器部１０２に繋がる流路及びその流路を開閉する開閉弁２１に連通している。
冷媒状態調整部１０１はさらに、熱源側ユニット１の冷媒入口にある開閉弁１３と連通する流路を備えており、その流路は開閉弁２０を介してガス管４に連通すると共に、異物回収容器部１０２に繋がる流路及びその流路を開閉する開閉弁２２に連通している。 The refrigerant state adjustment unit 101 is configured with the refrigerant-refrigerant heat exchanger 15 as a center. There, both ends of one flow path (high-pressure side flow path) of the refrigerant-refrigerant heat exchanger 15 communicate with the on-off valve 12 and the liquid pipe 3 of the heat source side unit 1, respectively. One end of the other flow path (low pressure side flow path) of the refrigerant-refrigerant heat exchanger 15 communicates with the gas pipe 4 via the pressure reducing device 16 and the opening / closing valve 19, and the pressure reducing device 16 and the opening / closing valve 18. And a flow path in which the other end (the other end of the low pressure side flow path) is connected to the foreign matter recovery container section 102 and the flow path. Is communicated with an on-off valve 21 for opening and closing.
The refrigerant state adjustment unit 101 further includes a flow path communicating with the on-off valve 13 at the refrigerant inlet of the heat source side unit 1, and the flow path communicates with the gas pipe 4 via the on-off valve 20 and collects foreign matter. It communicates with a channel connected to the container part 102 and an on-off valve 22 that opens and closes the channel.

異物回収容器部１０２は異物回収容器１７を備え、その冷媒入口と冷媒出口がそれぞれ冷媒状態調整部１０１の開閉弁２１，２２にそれぞれ連通している。異物回収容器１７は例えば１０リットル程度の収容能力を有し、その底部には内容物排出用の開閉弁２３も設けられている。   The foreign material recovery container unit 102 includes a foreign material recovery container 17, and the refrigerant inlet and the refrigerant outlet thereof communicate with the on-off valves 21 and 22 of the refrigerant state adjusting unit 101, respectively. The foreign material recovery container 17 has a capacity of, for example, about 10 liters, and an opening / closing valve 23 for discharging contents is provided at the bottom.

次に、リプレースキット１００を利用した洗浄運転時の動作を図４を参照しながら説明する。図４は図２の構成図に、冷媒の流れを示す矢印Ａを付し、さらに冷媒状態調整部１０１内で実際に冷媒が流れる流路を太線で表した洗浄運転時の説明図である。
まず、冷媒状態調整部１０１の開閉弁１８，２０を全閉、開閉弁１９，２１，２２を全開とする。また、熱源側ユニット１の開閉弁１２，１３と、利用側ユニット２のバイパス配管２４ａ、２４ｂの開閉弁２５ａ、２５ｂを全開とし、利用側ユニット２の各液電磁弁９を全閉とする。この状態で、冷凍サイクル装置を動作させて、図４の矢印Ａの方向に冷媒を流して、熱源側ユニット１、冷媒状態調整部１０１、液管３、利用側ユニット２の各ショーケースの冷媒入口部、バイパス配管２４ａ，２４ｂ、各ショーケースの冷媒出口部、ガス管４、冷媒状態調整部１０１、異物回収容器部１０２及び熱源側ユニット１からなる冷媒循環流路を循環させる。このとき、利用側ユニット２においては、液電磁弁９の全てが閉止されて、開閉弁２５ａ，２５ｂが開放されているため、冷媒はバイパス配管２４ａ，２４ｂを通過し、利用側ユニット２の蒸発器１１内に流れることはない。 Next, the operation during the cleaning operation using the replacement kit 100 will be described with reference to FIG. 4 is an explanatory diagram at the time of the cleaning operation in which the arrow A indicating the flow of the refrigerant is added to the configuration diagram of FIG. 2 and the flow path through which the refrigerant actually flows in the refrigerant state adjusting unit 101 is indicated by a bold line.
First, the on-off valves 18 and 20 of the refrigerant state adjusting unit 101 are fully closed, and the on-off valves 19, 21 and 22 are fully opened. Further, the on-off valves 12 and 13 of the heat source side unit 1 and the on-off valves 25a and 25b of the bypass pipes 24a and 24b of the use side unit 2 are fully opened, and the liquid electromagnetic valves 9 of the use side unit 2 are fully closed. In this state, the refrigeration cycle apparatus is operated to flow the refrigerant in the direction of arrow A in FIG. 4, and the refrigerant in each showcase of the heat source side unit 1, the refrigerant state adjustment unit 101, the liquid pipe 3, and the usage side unit 2. A refrigerant circulation passage including an inlet part, bypass pipes 24a and 24b, a refrigerant outlet part of each showcase, a gas pipe 4, a refrigerant state adjusting part 101, a foreign matter recovery container part 102 and a heat source side unit 1 is circulated. At this time, in the usage-side unit 2, all of the liquid electromagnetic valve 9 is closed and the on-off valves 25a and 25b are opened, so that the refrigerant passes through the bypass pipes 24a and 24b and evaporates the usage-side unit 2. It does not flow into the vessel 11.

この洗浄運転においては、圧縮機５から吐出されるガス冷媒は凝縮器６に流入するが、そこでの冷媒圧力は外気温度相当の飽和圧力に近く、ほとんど凝縮せずに流出する。また、レシーバ１０７にも液冷媒が貯留されることなく通過し、開閉弁１２を介して冷媒状態調整部１０１の冷媒−冷媒熱交換器１５の高圧側へ流入する。ここで、ガス冷媒は、利用側ユニット２からガス管４及び減圧装置１６を経由してきた戻り減圧冷媒と熱交換を行って、気液二相流へと状態変化し液管３へと流れる。   In this cleaning operation, the gas refrigerant discharged from the compressor 5 flows into the condenser 6, but the refrigerant pressure there is close to a saturation pressure corresponding to the outside air temperature, and flows out with little condensation. The liquid refrigerant also passes through the receiver 107 without being stored, and flows into the high-pressure side of the refrigerant-refrigerant heat exchanger 15 of the refrigerant state adjusting unit 101 via the on-off valve 12. Here, the gas refrigerant exchanges heat with the return decompression refrigerant that has passed through the gas pipe 4 and the decompression device 16 from the use side unit 2, changes its state to a gas-liquid two-phase flow, and flows to the liquid pipe 3.

液管３へ流入した気液二相冷媒は、液管３の管壁に付着する鉱油を引き剥がしながら進行し、バイパス管２４ａ、２４ｂを通過し、さらにガス管４を通ってそれらの管壁に残留する鉱油を引き剥がしながら、開閉弁１９を通って再び冷媒状態調整部１０１へ戻る。   The gas-liquid two-phase refrigerant that has flowed into the liquid pipe 3 travels while peeling off the mineral oil adhering to the pipe wall of the liquid pipe 3, passes through the bypass pipes 24 a and 24 b, and further passes through the gas pipe 4 to those pipe walls. While peeling off the mineral oil remaining in the gas, the refrigerant returns to the refrigerant state adjusting unit 101 through the on-off valve 19 again.

冷媒状態調整部１０１へ戻った気液二相冷媒は、減圧装置１６により減圧され、低圧二相冷媒となって冷媒−冷媒熱交換器１５の低圧側に流入する。低圧二相冷媒はここで高圧ガス冷媒と熱交換して蒸発後、過熱ガスとなって回収した鉱油とともに、開閉弁２１を介して異物回収容器部１０２の回収容器１７に流入する。回収容器１７に鉱油が回収された冷媒ガスは、開閉弁２２を通過して一旦冷媒状態調整部１０１に戻り、そこから開閉弁１３を介して再び圧縮機５に吸入される。   The gas-liquid two-phase refrigerant returned to the refrigerant state adjusting unit 101 is depressurized by the decompression device 16 and becomes a low-pressure two-phase refrigerant and flows into the low-pressure side of the refrigerant-refrigerant heat exchanger 15. Here, the low-pressure two-phase refrigerant exchanges heat with the high-pressure gas refrigerant, evaporates, and flows into the recovery container 17 of the foreign matter recovery container section 102 through the on-off valve 21 together with the mineral oil recovered as superheated gas. The refrigerant gas from which the mineral oil has been collected in the collection container 17 passes through the on-off valve 22, returns to the refrigerant state adjusting unit 101, and is sucked into the compressor 5 again through the on-off valve 13.

以上の作用により、ＨＦＣ冷媒と鉱油は非相溶であるが、液管３及びガス管４には高圧の気液二相冷媒が循環するため、管壁に付着する鉱油を引き剥がしながら冷媒中を移動させるので、短時間で配管を清浄することができる。
上記の配管洗浄運転を、数時間程度行った後（既設配管の長さや利用側ユニットの個数によりその時間は異なる）、洗浄運転を終了し、通常冷却運転へ移行する。 Although the HFC refrigerant and mineral oil are incompatible with each other due to the above action, the high-pressure gas-liquid two-phase refrigerant circulates in the liquid pipe 3 and the gas pipe 4, so that the mineral oil adhering to the pipe wall is peeled off while the refrigerant is in the refrigerant. The pipe can be cleaned in a short time.
After performing the above-described pipe cleaning operation for several hours (the time varies depending on the length of the existing pipe and the number of units on the use side), the cleaning operation is terminated, and a normal cooling operation is performed.

次に、通常冷却運転時の冷媒回路を図５に示す。図５の構成とするためには、まず冷媒状態調整部１０１の開閉弁２１，２２を全閉とした後、異物回収容器部１０２を冷媒状態調整部１０１から取り外して、異物回収容器部１０２の入口と出口に連通していた冷媒状態調整部１０１の２つの流路端部をバイパス配管２６で連結する。その後、開閉弁２１，２２を全開として、バイパス配管２６の真空引きを行う。なお、通常冷却運転を行う際には、冷媒状態調整部１０１の各開閉弁は、開閉弁１８，２０，２１，２２を全開、開閉弁１９を全閉とする。   Next, a refrigerant circuit during normal cooling operation is shown in FIG. In order to obtain the configuration shown in FIG. 5, first, the on-off valves 21 and 22 of the refrigerant state adjustment unit 101 are fully closed, and then the foreign material collection container unit 102 is detached from the refrigerant state adjustment unit 101, The two flow path ends of the refrigerant state adjusting unit 101 communicating with the inlet and the outlet are connected by a bypass pipe 26. Thereafter, the on-off valves 21 and 22 are fully opened, and the bypass pipe 26 is evacuated. When performing the normal cooling operation, the on / off valves of the refrigerant state adjusting unit 101 fully open the on / off valves 18, 20, 21, and 22 and fully close the on / off valve 19.

図５の構成の場合、冷媒状態調整部１０１を構成する筐体は、図６に示すように、通常は熱源側ユニット１を構成する筐体の近傍に設置される。
なお、この冷凍サイクル装置から取り外された異物回収容器部１０２は、回収容器１７から回収鉱油を抜取り後、他の現場で再利用することができる。 In the case of the configuration of FIG. 5, the casing that configures the refrigerant state adjusting unit 101 is normally installed in the vicinity of the casing that configures the heat source side unit 1, as illustrated in FIG. 6.
In addition, the foreign material collection | recovery container part 102 removed from this refrigeration cycle apparatus can be reused in another field after extracting the recovered mineral oil from the collection container 17.

次に、図５の構成の冷凍サイクル装置の動作を図７を参照しながら説明する。図７は図５の構成図に、冷媒の流れを示す矢印Ｂを付し、さらに冷媒状態調整部１０１内で実際に冷媒が流れる流路を太線で表した通常冷却運転時の説明図である。
圧縮機５から吐出された高温高圧のガス冷媒は凝縮器６で外気に放熱して凝縮液化し、レシーバ７に貯留されるとともに、その液冷媒は冷媒−冷媒熱交換器１５の高圧側流路へ流入する。冷媒一冷媒熱交換器１５の高圧側流路を出た液冷媒の一部は分岐され、開閉弁１８を経て減圧装置１６により減圧され、低圧の気液二相状態へ変化して、再び冷媒−冷媒熱交換器１５の低圧側流路へ流入し、そこで高圧側液冷媒との熱交換に供される。これにより、高圧側液冷媒は過冷却度を増し、一方、低圧側冷媒は蒸発してガス冷媒となり、利用側ユニット２で蒸発した低圧ガス冷媒と合流して、開閉弁１３を介して再び圧縮機５に吸入されるという動作を繰り返す。 Next, the operation of the refrigeration cycle apparatus configured as shown in FIG. 5 will be described with reference to FIG. FIG. 7 is an explanatory diagram of the normal cooling operation in which the arrow B indicating the flow of the refrigerant is added to the configuration diagram of FIG. 5 and the flow path through which the refrigerant actually flows in the refrigerant state adjusting unit 101 is indicated by a bold line. .
The high-temperature and high-pressure gas refrigerant discharged from the compressor 5 radiates heat to the outside air in the condenser 6 to be condensed and liquefied and stored in the receiver 7, and the liquid refrigerant is the high-pressure side flow path of the refrigerant-refrigerant heat exchanger 15. Flow into. Part of the liquid refrigerant that has exited the high-pressure side flow path of the refrigerant-refrigerant heat exchanger 15 is branched, depressurized by the decompression device 16 via the on-off valve 18, changes to a low-pressure gas-liquid two-phase state, and the refrigerant again -It flows into the low-pressure side flow path of the refrigerant heat exchanger 15, where it is used for heat exchange with the high-pressure side liquid refrigerant. As a result, the high-pressure side liquid refrigerant increases the degree of supercooling, while the low-pressure side refrigerant evaporates to become a gas refrigerant, merges with the low-pressure gas refrigerant evaporated in the use side unit 2, and is compressed again through the on-off valve 13. The operation of being inhaled by the machine 5 is repeated.

以上の作用により、液管３に流入する液冷媒の過冷却度が増大し、既設液配管の径が新冷凍機の液管の径よりも小さく、圧力損失が増大する場合においても、液配管中でフラッシュガスが発生することなく、運転状態が不安定になることがない。また、既設液配管径と新冷凍機の液管径が同一の場合においては、蒸発器での利用エンタルピが増大し、冷凍能力の向上が可能となる。   As a result of the above operation, the degree of supercooling of the liquid refrigerant flowing into the liquid pipe 3 is increased, the diameter of the existing liquid pipe is smaller than the diameter of the liquid pipe of the new refrigerator, and the liquid pipe is increased. There is no generation of flash gas, and the operation state does not become unstable. In addition, when the existing liquid pipe diameter is the same as the liquid pipe diameter of the new refrigerator, the enthalpy of use in the evaporator increases and the refrigeration capacity can be improved.

このように、実施の形態１のリプレースキット１００は、既設配管の洗浄に利用した装置の一部である冷媒状態調整部１０１を過冷却熱交換器として再利用することで、優れた効果を奏することができる。しかも、通常冷却運転時には、リプレースキット１００のなかでも大きな場所を占める異物回収容器部１０２を取り外してしまうことができるため、設置スペースが狭い場合においても利用性が高まる。加えて、取り外した異物回収容器部１０２は他の場所で再利用が可能となる。   As described above, the replacement kit 100 according to the first embodiment has an excellent effect by reusing the refrigerant state adjusting unit 101, which is a part of the apparatus used for cleaning the existing piping, as the supercooling heat exchanger. be able to. Moreover, during the normal cooling operation, the foreign matter collection container 102 that occupies a large place in the replacement kit 100 can be removed, so that the utility is improved even when the installation space is small. In addition, the removed foreign matter collection container 102 can be reused elsewhere.

実施の形態２
実施の形態２に示すリプレースキット１００は、実施の形態１の冷媒状態調整部１０１を複数の冷媒状態調整部から構成したものである。ここでは基本となる冷媒状態調整部１０１Ａに、冷媒状態調整部１０１Ｂを取り外し可能に１個以上備えたものである、すなわち、複数の冷媒状態調整部１０１Ａ，１０１Ｂをそれぞれ別々の筐体から構成して、図８に示すように、各冷媒状態調整部１０１Ａ，１０１Ｂを冷凍サイクル装置の冷媒回路に並列に連結し、冷媒状態調整部群１０３を構成するようにしたものである。これらの冷媒状態調整部１０１Ａ，１０１Ｂは、実施の形態１の冷媒状態調整部１０１と実質的に同じ作用を果たすものである。ただし、これらの冷媒状態調整部１０１Ａ，１０１Ｂには、連結されている他の冷媒状態調整部１０１Ａ，１０１Ｂから、すなわち冷媒状態調整部群１０３から取り外し可能とするための開閉弁６１〜６５，７１〜７５，８１〜８５，９１〜９５が付加されている。なお、冷媒状態調整部群１０３を構成する冷媒状態調整部の個数は必要に応じて変更してもよい。 Embodiment 2
The replacement kit 100 shown in the second embodiment is configured by configuring the refrigerant state adjusting unit 101 of the first embodiment from a plurality of refrigerant state adjusting units. Here, the basic refrigerant state adjusting unit 101A is provided with one or more refrigerant state adjusting units 101B so as to be removable. That is, the refrigerant state adjusting units 101A and 101B are configured by separate casings. As shown in FIG. 8, the refrigerant state adjusting units 101A and 101B are connected in parallel to the refrigerant circuit of the refrigeration cycle apparatus to constitute the refrigerant state adjusting unit group 103. These refrigerant state adjusting units 101A and 101B perform substantially the same operation as the refrigerant state adjusting unit 101 of the first embodiment. However, these refrigerant state adjusting units 101A and 101B are provided with on-off valves 61 to 65 and 71 for making them removable from other connected refrigerant state adjusting units 101A and 101B, that is, from the refrigerant state adjusting unit group 103. -75, 81-85, 91-95 are added. Note that the number of refrigerant state adjustment units constituting the refrigerant state adjustment unit group 103 may be changed as necessary.

異物回収容器部１０２は実施の形態１と同様１つだけであり、冷媒状態調整部群１０３のうちの基本となる冷媒状態調整部１０１Ａに、取り外し可能に連結されている。なお、異物回収容器部１０２とその基本となる１つの冷媒状態調整部１０１Ａとから成る構成は、実施の形態１と同じ構成になる。
実施の形態２の構成の場合、熱源側ユニット１、冷媒状態調整部１０１Ａ，１０１Ｂ、及び異物回収容器部１０２を構成する各筐体は、通常は図９に示すような配置で設置される。 As with the first embodiment, there is only one foreign matter collection container 102, and it is detachably connected to the basic refrigerant state adjustment unit 101 </ b> A in the refrigerant state adjustment unit group 103. In addition, the structure which consists of the foreign material collection | recovery container part 102 and one refrigerant | coolant state adjustment part 101A used as the foundation becomes the same structure as Embodiment 1. FIG.
In the case of the configuration of the second embodiment, the housings constituting the heat source side unit 1, the refrigerant state adjusting units 101A and 101B, and the foreign matter collection container unit 102 are usually installed in the arrangement as shown in FIG.

冷媒状態調整部群１０３を設ける構成としたのは、洗浄運転を行う際に必要な熱交換器の容量は、洗浄運転後の通常冷却運転中に過冷却熱交換器として再利用する場合に必要な熱交換器の容量より、大きな容量を必要とする場合が多いことを考慮したためである。また、１台のリプレースキット１００で様々な容量帯の冷凍サイクル装置に対応するために、熱交換器の容量をそれに合わせて変更できるようにするためである。   The refrigerant state adjusting unit group 103 is provided so that the capacity of the heat exchanger necessary for the cleaning operation is necessary when the refrigerant is reused as a supercooling heat exchanger during the normal cooling operation after the cleaning operation. This is because a large capacity is often required in comparison with the capacity of a heat exchanger. Further, in order to deal with the refrigeration cycle apparatus of various capacity bands with one replacement kit 100, the capacity of the heat exchanger can be changed accordingly.

実施の形態２の構成によれば、配管洗浄運転時には熱源ユニット１の容量に合わせて、必要な個数の冷媒状態調整部１０１Ａ，１０１Ｂを利用して洗浄を行い、洗浄運転後の通常冷却運転時には、過冷却に必要な分だけの冷媒状態調整部を残したまま、不要な冷媒状態調整部１０１Ｂと異物回収容器部１０２を、そのリプレースキット１００から取り外す。このようにすることで、洗浄運転時には冷媒状態調整部１０１Ａ，１０１Ｂの接続数の増減により、幅広い容量帯の熱源ユニット１に対応できる。また、通常冷却運転時は、設置場所のスペース、必要過冷却度など、実際の状況に応じて必要な分だけの冷媒状態調整部１０１Ａ，１０１Ｂを備える事ができる。さらに、取り外した冷媒状態調整部１０１Ｂと異物回収容器部１０２は、他の場所で再利用が可能となる。   According to the configuration of the second embodiment, during the pipe cleaning operation, cleaning is performed using the necessary number of refrigerant state adjusting units 101A and 101B according to the capacity of the heat source unit 1, and during the normal cooling operation after the cleaning operation. Then, the unnecessary refrigerant state adjustment unit 101B and the foreign matter collection container unit 102 are removed from the replacement kit 100 while leaving only the refrigerant state adjustment unit necessary for supercooling. By doing in this way, it can respond to the heat source unit 1 of a wide capacity band by increase / decrease in the number of connection of the refrigerant | coolant state adjustment part 101A, 101B at the time of washing | cleaning driving | operation. Further, during the normal cooling operation, the refrigerant state adjusting units 101A and 101B can be provided as much as necessary according to the actual situation, such as the space at the installation location and the necessary supercooling degree. Furthermore, the removed refrigerant state adjustment unit 101B and the foreign matter collection container unit 102 can be reused in other places.

実施の形態３
実施の形態１及び２では、凝縮器６が圧縮機５と一体に納められている一体型の熱源ユニット１を使用した冷凍サイクル装置に、リプレースキットを適用した例を示した。
しかしながら、本発明のリプレースキット１００は、凝縮器６と圧縮機５とを離れた別の場所に分離しておくリモート型の熱源ユニットを使用した冷凍サイクル装置にも適用することができる。一体型の熱源ユニットが全体として屋外に設置されるのに対し、リモート型の場合、圧縮機５を内蔵した圧縮ユニットは、例えばスーパーなど店舗の機械室内に設置されることが多い。リモート型の熱源側ユニット及び利用側ユニットを新たな機種に交換する際にも、リプレースキット１００を利用して既設配管の洗浄を行った後、冷媒状態調整部１０１または１０１Ａ，１０１Ｂを必要な数だけ残し、異物回収容器部１０２及び不要な冷媒状態調整部１０１Ｂはリプレースキット１００から取り外すことにより、冷媒状態調整部１０１，１０１Ａなどを、圧縮機５と共に、機械室内に収納する事が可能となる。 Embodiment 3
In Embodiment 1 and 2, the example which applied the replacement kit to the refrigerating-cycle apparatus using the integrated heat source unit 1 in which the condenser 6 was united with the compressor 5 was shown.
However, the replacement kit 100 of the present invention can also be applied to a refrigeration cycle apparatus using a remote heat source unit in which the condenser 6 and the compressor 5 are separated at different locations. Whereas the integrated heat source unit is installed outdoors as a whole, in the case of the remote type, the compression unit including the compressor 5 is often installed in a machine room of a store such as a supermarket. Even when the remote heat source side unit and the usage side unit are replaced with new models, after the existing pipe is cleaned using the replacement kit 100, the refrigerant state adjusting units 101 or 101A, 101B are required in number. The foreign substance collection container 102 and the unnecessary refrigerant state adjusting unit 101B are removed from the replacement kit 100, so that the refrigerant state adjusting units 101, 101A and the like can be housed together with the compressor 5 in the machine room. .

ところで、実施の形態１〜３における冷媒状態調整部１０１，１０１Ａと異物回収容器部１０２との流路配管の連結、及び実施の形態２における冷媒状態調整部同士の流路配管の連結は、シール性を有した継手などを利用して連結するようにしておけば、それらの取り外しを容易に行うことができる。
また、冷媒状態調整部１０１，１０１Ａから異物回収容器部１０２を取り外した際、異物回収容器部１０２に連通していた冷媒状態調整部１０１，１０１Ａの出入口流路を繋ぐための流路は、図５に示したバイパス配管２６の他、図１０に示す態様のバイパス配管２７及びその配管を開閉する開閉弁２７ａから構成することもできる。図１０の場合、洗浄運転時は開閉弁２７ａを閉じてバイパス配管２７を遮断しておき、異物回収容器部１０２を取り外したときには、開閉弁２１，２２を閉じるとともに、開閉弁２７ａを開くことで、このバイパス配管２７を容易に冷媒循環回路の一部とすることができる。
なお、本発明の実施の形態に関連して図１〜図１０に示した冷媒回路や設置図は、あくまでも一例であり、本発明がこれらの図の構成に限定されるものではない。 By the way, the connection of the flow path piping between the refrigerant state adjustment units 101, 101A and the foreign matter collection container 102 in the first to third embodiments and the connection of the flow path piping between the refrigerant state adjustment units in the second embodiment are sealed. If they are connected by using a joint having properties, they can be easily removed.
Further, the flow path for connecting the inlet / outlet flow paths of the refrigerant state adjusting units 101 and 101A communicating with the foreign substance collecting container unit 102 when the foreign substance collecting container unit 102 is removed from the refrigerant state adjusting units 101 and 101A is shown in FIG. In addition to the bypass pipe 26 shown in FIG. 5, the bypass pipe 27 in the mode shown in FIG. 10 and an on-off valve 27a for opening and closing the pipe can be used. In the case of FIG. 10, during the cleaning operation, the on-off valve 27a is closed and the bypass pipe 27 is shut off. When the foreign matter collection container 102 is removed, the on-off valves 21 and 22 are closed and the on-off valve 27a is opened. The bypass pipe 27 can be easily made a part of the refrigerant circuit.
Note that the refrigerant circuits and installation diagrams shown in FIGS. 1 to 10 in relation to the embodiment of the present invention are merely examples, and the present invention is not limited to the configurations of these drawings.

公知の冷凍サイクル装置の構成図。The block diagram of a well-known refrigeration cycle apparatus. 実施の形態１に係るリプレースキットを含んだ冷凍サイクル装置の構成図。1 is a configuration diagram of a refrigeration cycle apparatus including a replacement kit according to Embodiment 1. FIG. 図２の冷凍サイクル装置の熱源側ユニットとリプレースキットの設置図。FIG. 3 is an installation diagram of a heat source side unit and a replacement kit of the refrigeration cycle apparatus of FIG. 2. リプレースキットを利用した既設配管洗浄時の説明図。Explanatory drawing at the time of existing piping cleaning using a replacement kit. 図２から異物回収容器部１０２を取り外した冷凍サイクル装置の構成図。The block diagram of the refrigeration cycle apparatus which removed the foreign material collection container part 102 from FIG. 図５の冷凍サイクル装置の熱源側ユニットと冷媒状態調整部の設置図。FIG. 6 is an installation diagram of a heat source side unit and a refrigerant state adjustment unit of the refrigeration cycle apparatus of FIG. 5. 図５の冷凍サイクル装置による冷却運転時の説明図。Explanatory drawing at the time of the cooling operation by the refrigeration cycle apparatus of FIG. 実施の形態２に係るリプレースキットを含んだ冷凍サイクル装置の構成図。FIG. 4 is a configuration diagram of a refrigeration cycle apparatus including a replacement kit according to a second embodiment. 図８の冷凍サイクル装置の熱源側ユニットとリプレースキットの設置図。FIG. 9 is an installation diagram of a heat source side unit and a replacement kit of the refrigeration cycle apparatus of FIG. 8. 冷媒状態調整部の異物回収容器部との接続部周辺のバイパス配管例示図。The bypass piping example figure of a connection part periphery with the foreign material collection container part of a refrigerant | coolant state adjustment part.

符号の説明Explanation of symbols

１ 熱源側ユニット、２ 利用側ユニット、２ａ，２ｂ ショーケース、３ 液管、４ ガス管、５ 圧縮機、６ 凝縮器、７ レシーバ、８ アキュムレータ、９ 液電磁弁、１０ 膨張弁、１１ 蒸発器、１２，１３ 開閉弁、１５ 冷媒−冷媒熱交換器、１６ 減圧装置、１７ 異物回収容器、１８，１９、２０，２１，２２，２３ 開閉弁、２４ａ，２４ｂ バイパス配管、２５ａ，２５ｂ 開閉弁、２６ バイパス配管、２７ バイパス配管、２７ａ 開閉弁、１００ リプレースキット、１０１，１０１Ａ，１０１Ｂ 冷媒状態調整部、１０２ 異物回収容器部、１０３ 冷媒状態調整部群。   1 heat source side unit, 2 use side unit, 2a, 2b showcase, 3 liquid pipe, 4 gas pipe, 5 compressor, 6 condenser, 7 receiver, 8 accumulator, 9 liquid solenoid valve, 10 expansion valve, 11 evaporator , 12, 13 On-off valve, 15 Refrigerant-refrigerant heat exchanger, 16 Depressurization device, 17 Foreign material recovery container, 18, 19, 20, 21, 22, 23 On-off valve, 24a, 24b Bypass piping, 25a, 25b On-off valve, 26 Bypass piping, 27 Bypass piping, 27a On-off valve, 100 Replacement kit, 101, 101A, 101B Refrigerant state adjustment unit, 102 Foreign matter recovery container unit, 103 Refrigerant state adjustment unit group

Claims (6)

冷凍サイクル装置を構成する熱源側ユニットと利用側ユニットとの間に配置されて、各ユニット間を接続する冷媒配管に残留した異物の除去に供されるリプレースキットであって、
前記リプレースキットは、前記熱源側ユニットから前記利用側ユニットへ向かう冷媒を、配管洗浄時には気液二相にし、冷却運転時には過冷却する冷媒−冷媒熱交換器を有した冷媒状態調整部と、前記利用側ユニットから前記熱源側ユニットへ戻る前記冷媒の流路の一部を構成する異物回収容器を有した異物回収容器部とを備えてなり、
前記冷媒状態調整部と前記異物回収容器部とを別々の筐体から構成して、前記異物回収容器部を前記冷媒状態調整部から取り外し可能としていることを特徴とする配管洗浄用のリプレースキット。 A replacement kit that is disposed between the heat source side unit and the use side unit constituting the refrigeration cycle apparatus and is used for removing foreign matters remaining in the refrigerant pipe connecting the units,
The replacement kit includes a refrigerant state adjusting unit having a refrigerant-refrigerant heat exchanger that converts the refrigerant from the heat source side unit to the utilization side unit into a gas-liquid two-phase during pipe cleaning and supercooling during cooling operation, A foreign matter collection container portion having a foreign matter collection container constituting a part of the flow path of the refrigerant returning from the use side unit to the heat source side unit,
A replacement kit for pipe cleaning, wherein the refrigerant condition adjusting unit and the foreign substance recovery container part are configured from separate casings, and the foreign substance recovery container part is removable from the refrigerant condition adjusting part. 前記冷媒状態調整部を複数備えて冷媒状態調整部群を構成するとともに、各前記冷媒状態調整部をそれぞれ別々の筐体から構成して前記冷媒状態調整部群から取り外し可能としていることを特徴とする請求項１記載の配管洗浄用のリプレースキット。   A plurality of the refrigerant state adjustment units are provided to constitute a refrigerant state adjustment unit group, and each of the refrigerant state adjustment units is configured from a separate casing, and is removable from the refrigerant state adjustment unit group. The replacement kit for pipe cleaning according to claim 1. 前記冷媒−冷媒熱交換器は、前記熱源側ユニットから利用側ユニットへ向かう冷媒と、前記利用側ユニットから熱源側ユニットへ戻る前記冷媒を減圧した戻り減圧冷媒との間での熱交換、及び前記熱源側ユニットから利用側ユニットへ向かう冷媒と、前記冷媒−冷媒熱交換器を出て前記利用側ユニットへ向かう冷媒から分岐して減圧した分岐減圧冷媒との間での熱交換とが可能となるように配置されていることを特徴とする請求項１または２記載の配管洗浄用のリプレースキット。   The refrigerant-refrigerant heat exchanger is configured to exchange heat between the refrigerant from the heat source side unit to the user side unit and the return decompressed refrigerant from which the refrigerant returning from the user side unit to the heat source side unit has been decompressed, and Heat exchange can be performed between the refrigerant heading from the heat source side unit to the user side unit and the branched decompressed refrigerant branching out from the refrigerant heading out of the refrigerant-refrigerant heat exchanger and heading to the user side unit. The replacement kit for cleaning pipes according to claim 1 or 2, wherein the replacement kit is arranged as described above. 前記異物回収容器部の冷媒入口と冷媒出口に連通する前記冷媒状態調整部の２つの流路を連結する配管及びその配管を開閉する開閉弁を備えていることを特徴とする請求項１〜３のいずれかに記載の配管洗浄用のリプレースキット。   4. A pipe for connecting two flow paths of the refrigerant state adjusting unit communicating with a refrigerant inlet and a refrigerant outlet of the foreign material recovery container unit, and an on-off valve for opening and closing the pipe. Replacement kit for pipe cleaning according to any one of the above. 請求項１〜４のいずれかに記載のリプレースキットの使用方法であって、
前記配管の洗浄時には前記冷媒状態調整部と前記異物回収容器部の両方を使用して既設配管の洗浄を行い、
前記配管の洗浄終了後は、前記異物回収容器部を前記冷媒状態調整部から取り外し、前記冷媒状態調整部のみを過冷却装置として利用することを特徴とする配管洗浄用のリプレースキットの使用方法。 A method of using the replacement kit according to any one of claims 1 to 4,
When cleaning the piping, the existing piping is cleaned using both the refrigerant condition adjustment unit and the foreign matter collection container unit,
After the pipe cleaning is completed, the foreign matter recovery container part is removed from the refrigerant condition adjusting part, and only the refrigerant condition adjusting part is used as a supercooling device. 熱源側ユニットと、利用側ユニットと、前記熱源側ユニットと前記利用側ユニットとを接続する冷媒配管と、前記熱源側ユニットから前記利用側ユニットへ流れる冷媒を過冷却する過冷却ユニットとを備えた冷凍サイクル装置であって、
前記過冷却ユニットが、前記冷媒配管内の異物除去に供された配管洗浄装置の一部からなり、
前記配管洗浄装置は、前記熱源側ユニットから前記利用側ユニットへ向かう冷媒を、配管洗浄時には気液二相にし、冷却運転時には過冷却する冷媒−冷媒熱交換器を有した冷媒状態調整部と、前記利用側ユニットから前記熱源側ユニットへ戻る前記冷媒の流路の一部を構成する異物回収容器を有した異物回収容器部とを備えたものであって、
前記過冷却ユニットは、前記異物回収容器部が前記冷媒状態調整部から取り外されてなるものであることを特徴とする冷凍サイクル装置。
A heat source side unit; a use side unit; a refrigerant pipe connecting the heat source side unit and the use side unit; and a supercooling unit that supercools the refrigerant flowing from the heat source side unit to the use side unit. A refrigeration cycle apparatus,
The supercooling unit consists of a part of a pipe cleaning device used for removing foreign substances in the refrigerant pipe,
The pipe cleaning device has a refrigerant state adjusting unit having a refrigerant-refrigerant heat exchanger that makes the refrigerant heading from the heat source side unit to the user side unit into a gas-liquid two phase during pipe cleaning and supercooling during cooling operation, A foreign matter recovery container portion having a foreign matter recovery container constituting a part of the refrigerant flow path returning from the use side unit to the heat source side unit,
The refrigeration cycle apparatus, wherein the subcooling unit is configured such that the foreign matter collection container part is removed from the refrigerant state adjusting part.
JP2006051940A 2006-02-28 2006-02-28 Replacement kit for cleaning piping, its use method, and refrigerating cycle device Pending JP2007232244A (en)

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