JP2011021837A - Refrigerating cycle device and method of controlling refrigerating cycle device - Google Patents

Refrigerating cycle device and method of controlling refrigerating cycle device Download PDF

Info

Publication number
JP2011021837A
JP2011021837A JP2009168140A JP2009168140A JP2011021837A JP 2011021837 A JP2011021837 A JP 2011021837A JP 2009168140 A JP2009168140 A JP 2009168140A JP 2009168140 A JP2009168140 A JP 2009168140A JP 2011021837 A JP2011021837 A JP 2011021837A
Authority
JP
Japan
Prior art keywords
refrigerant
valve
indoor
pipe
outdoor
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.)
Granted
Application number
JP2009168140A
Other languages
Japanese (ja)
Other versions
JP5481981B2 (en
Inventor
Hiroaki Nakamune
Shinichi Wakamoto
浩昭 中宗
慎一 若本
Original Assignee
Mitsubishi Electric Corp
三菱電機株式会社
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 Mitsubishi Electric Corp, 三菱電機株式会社 filed Critical Mitsubishi Electric Corp
Priority to JP2009168140A priority Critical patent/JP5481981B2/en
Publication of JP2011021837A publication Critical patent/JP2011021837A/en
Application granted granted Critical
Publication of JP5481981B2 publication Critical patent/JP5481981B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerating cycle device and a method of controlling the refrigerating cycle device capable of promptly recovering a refrigerant when refrigerant leakage is detected. <P>SOLUTION: This refrigerating cycle device includes a liquid pipe 4 as a pipe connecting an indoor heat exchanger 10 and an expansion valve 9, a gas pipe 3 as a pipe connecting a compressor 5 and the indoor heat exchanger 10, a liquid pipe valve 14 disposed in the liquid pipe 4, a gas pipe valve 13 disposed in the gas pipe 3, an indoor leakage detection sensor 12 disposed indoors to detect the refrigerant leakage, and a control device closing the gas pipe valve 13 when the indoor leakage detection sensor 12 detects the refrigerant leakage in a heating operation, and closes the liquid pipe valve 14 after the refrigerant at an indoor unit 1 side is recovered. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、冷媒を用いて空調または給湯行う冷凍サイクル装置およびその冷凍サイクル装置の制御方法に関するものである。   The present invention relates to a refrigeration cycle apparatus that performs air conditioning or hot water supply using a refrigerant, and a control method for the refrigeration cycle apparatus.
冷媒を用いて空調または給湯を行う冷凍サイクル装置においては、室内に冷媒が漏洩すると、居住環境が悪化するおそれがあり、室外に冷媒が漏洩すると、地球温暖化係数の高い冷媒を用いている場合には、当該冷媒が大気中に放出されることになるので、冷媒の漏洩量をできるだけ低減する必要がある。   In a refrigeration cycle apparatus that performs air conditioning or hot water supply using a refrigerant, if the refrigerant leaks into the room, the living environment may deteriorate, and if the refrigerant leaks outside, a refrigerant with a high global warming potential is used. Therefore, since the refrigerant is released into the atmosphere, it is necessary to reduce the leakage amount of the refrigerant as much as possible.
従来の冷凍サイクル装置においては、室内ユニットと室外ユニットとをガス配管および液配管で冷媒回路を形成し、各配管途中にガス配管開閉弁および液配管開閉弁を設け、暖房運転の際に冷媒の漏洩を検知する漏洩検知装置が冷媒の漏洩を検知したときに、冷房運転に切り替えてから液配管開閉弁を閉じ、冷媒をガス配管を介して室外ユニットに回収した後、ガス配管開閉弁を閉じるものがある(例えば、特許文献1)。   In a conventional refrigeration cycle apparatus, a refrigerant circuit is formed by gas piping and liquid piping between an indoor unit and an outdoor unit, and a gas piping on-off valve and a liquid piping on-off valve are provided in the middle of each pipe so When the leakage detection device that detects leakage detects leakage of the refrigerant, after switching to cooling operation, the liquid piping on / off valve is closed, the refrigerant is collected in the outdoor unit via the gas piping, and then the gas piping on / off valve is closed. There is a thing (for example, patent document 1).
特開平5−118720号公報(第4頁、図4)Japanese Patent Laid-Open No. 5-118720 (page 4, FIG. 4)
上記のような冷凍サイクル装置においては、ガス管側に比べて液管側に多くの冷媒が滞留しているので、冷媒の漏洩を検知したときにガス管を介して冷媒を回収すると、速やかに回収できないという問題がある。   In the refrigeration cycle apparatus as described above, since a larger amount of refrigerant stays on the liquid pipe side than on the gas pipe side, when refrigerant is recovered through the gas pipe when leakage of the refrigerant is detected, There is a problem that it cannot be recovered.
本発明は、かかる問題点を解決するためになされたものであり、冷媒の漏洩を検知したときに速やかに冷媒を回収できる冷凍サイクル装置を提供することを目的としている。   The present invention has been made to solve such a problem, and an object of the present invention is to provide a refrigeration cycle apparatus that can quickly collect a refrigerant when leakage of the refrigerant is detected.
この発明による冷凍サイクル装置は、冷媒を圧縮する圧縮機、前記冷媒と室内の空気とを熱交換する室内熱交換器、冷媒を膨張する膨張弁、および前記冷媒と室外の空気とを熱交換する室外熱交換器が配管で接続され、前記室内熱交換器は室内に設置される室内機に設けられ、前記圧縮機、前記膨張弁、および前記室外熱交換器は室外に設置される室外機に設けられる冷凍サイクル装置において、前記室内熱交換器と前記膨張弁との間を接続する配管である液管、前記圧縮機と前記室内熱交換器との間を接続する配管であるガス管、前記液管に設けられる液管弁、前記ガス管に設けられるガス管弁、前記室内に設けられ前記冷媒の漏洩を検知する室内漏洩検知センサ、および暖房運転の際に前記室内漏洩検知センサが前記冷媒の漏洩を検知した場合に、前記ガス管弁を閉じ、前記室内機側の冷媒を回収した後に前記液管弁を閉じる制御装置を備えたものである。   The refrigeration cycle apparatus according to the present invention includes a compressor that compresses refrigerant, an indoor heat exchanger that exchanges heat between the refrigerant and indoor air, an expansion valve that expands the refrigerant, and heat exchange between the refrigerant and outdoor air. An outdoor heat exchanger is connected by piping, the indoor heat exchanger is provided in an indoor unit installed indoors, and the compressor, the expansion valve, and the outdoor heat exchanger are installed in an outdoor unit installed outdoor. In the refrigeration cycle apparatus provided, a liquid pipe that is a pipe that connects between the indoor heat exchanger and the expansion valve, a gas pipe that is a pipe that connects the compressor and the indoor heat exchanger, A liquid pipe valve provided in the liquid pipe, a gas pipe valve provided in the gas pipe, an indoor leak detection sensor provided in the room for detecting leakage of the refrigerant, and the indoor leak detection sensor in the heating operation. Detecting leaks Case, closing the gas pipe valve, in which a control device for closing the liquid tube valve after recovering the refrigerant of the indoor unit side.
また、この発明による冷凍サイクル装置の制御方法は、冷媒を圧縮する圧縮機、前記冷媒と室内の空気とを熱交換する室内熱交換器、冷媒を膨張する膨張弁、および前記冷媒と室外の空気とを熱交換する室外熱交換器が配管で接続され、前記室内熱交換器は室内に設置される室内機に設けられ、前記圧縮機、前記膨張弁、および前記室外熱交換器は室外に設置される室外機に設けられ、前記室内熱交換器と前記膨張弁との間を接続する配管である液管、前記圧縮機と前記室内熱交換器との間を接続する配管であるガス管、前記液管に設けられる液管弁、前記ガス管に設けられるガス管弁、前記室内に設けられ前記冷媒の漏洩を検知する室内漏洩検知センサを備えた冷凍サイクル装置の制御方法において、暖房運転の際に前記室内漏洩検知センサが前記冷媒の漏洩を検知した場合に、前記ガス管弁を閉じ、前記室内機側の冷媒を回収した後に前記液管弁を閉じるものである。   The control method of the refrigeration cycle apparatus according to the present invention includes a compressor that compresses a refrigerant, an indoor heat exchanger that exchanges heat between the refrigerant and indoor air, an expansion valve that expands the refrigerant, and the refrigerant and outdoor air. An outdoor heat exchanger that exchanges heat with each other is connected by piping, the indoor heat exchanger is provided in an indoor unit installed indoors, and the compressor, the expansion valve, and the outdoor heat exchanger are installed outdoor A liquid pipe that is a pipe that connects between the indoor heat exchanger and the expansion valve, a gas pipe that is a pipe that connects between the compressor and the indoor heat exchanger, In a control method for a refrigeration cycle apparatus comprising a liquid pipe valve provided in the liquid pipe, a gas pipe valve provided in the gas pipe, and an indoor leak detection sensor provided in the room for detecting leakage of the refrigerant, When the indoor leak detection sensor There when detecting the leakage of the refrigerant, closes the gas pipe valve is the liquid pipe valve closed ones after recovering the refrigerant of the indoor unit side.
この発明の冷凍サイクル装置および冷凍サイクル装置の制御方法によれば、冷媒の漏洩を検知したときに速やかに冷媒を回収できる。   According to the refrigeration cycle apparatus and the control method for the refrigeration cycle apparatus of the present invention, the refrigerant can be quickly recovered when the leakage of the refrigerant is detected.
この発明の実施の形態1による冷凍サイクル装置の構成を示す概略図である。It is the schematic which shows the structure of the refrigerating-cycle apparatus by Embodiment 1 of this invention. この発明の実施の形態2による冷凍サイクル装置の構成を示す概略図である。It is the schematic which shows the structure of the refrigerating-cycle apparatus by Embodiment 2 of this invention.
実施の形態1.
図1は、この発明の実施の形態1による冷凍サイクル装置の構成を示す概略図である。図において、同一の符号を付したものは、同一またはこれに相当するものであり、このことは、明細書の全文において共通することである。
Embodiment 1 FIG.
1 is a schematic diagram showing a configuration of a refrigeration cycle apparatus according to Embodiment 1 of the present invention. In the drawings, the same reference numerals are the same or equivalent, and this is common throughout the entire specification.
図1において、冷凍サイクル装置は、室内に設置される室内機1および室外に設置される室外機2を備えている。室内機1には、室内の空気と冷媒とを熱交換する室内熱交換器10および室内熱交換器10に室内の空気を送る室内ファン11が設けられる。室外機2には、室外の空気と冷媒とを熱交換する室外熱交換器7、室外熱交換器7に室外の空気を送る室外ファン8、冷媒を圧縮する圧縮機5、冷媒を膨張する膨張弁9、および暖房運転と冷房運転とで流路を切り替える四方弁6が設けられる。図1の四方弁6において、実線は暖房運転の冷媒回路を示し、破線は冷房運転の冷媒回路を示す。   In FIG. 1, the refrigeration cycle apparatus includes an indoor unit 1 installed indoors and an outdoor unit 2 installed outdoor. The indoor unit 1 is provided with an indoor heat exchanger 10 that exchanges heat between indoor air and refrigerant, and an indoor fan 11 that sends indoor air to the indoor heat exchanger 10. The outdoor unit 2 includes an outdoor heat exchanger 7 that exchanges heat between the outdoor air and the refrigerant, an outdoor fan 8 that sends outdoor air to the outdoor heat exchanger 7, a compressor 5 that compresses the refrigerant, and an expansion that expands the refrigerant. A valve 9 and a four-way valve 6 for switching the flow path between the heating operation and the cooling operation are provided. In the four-way valve 6 of FIG. 1, a solid line indicates a refrigerant circuit for heating operation, and a broken line indicates a refrigerant circuit for cooling operation.
室内熱交換器10、膨張弁9、室外熱交換器7、四方弁6および圧縮機5は、配管で接続され、冷媒回路を構成している。室内熱交換器10と膨張弁9との間を接続する配管を液管4とし、室内熱交換器10と圧縮機5との間を接続する配管をガス管3とし、冷媒回路の圧力損失を低減するためにガス管3の流路断面積(ここでは、直径)は、液管4の流路断面積(ここでは、直径)に比べて大きくなっている。また、冷凍サイクル装置は、ガス管3の室内機1と室外機2との間に電磁開閉弁であるガス管弁13を設け、液管4の室内機1と室外機2との間に電磁開閉弁である液管弁14を設けている。さらに、室内機1に冷媒の漏洩を検知する室内漏洩検知センサ12を設け、室外機2に冷媒の漏洩を検知する室外漏洩検知センサ22を設けている。また、ガス管弁13は、図1では室内機1と室外機2との間に設置しているが、回収する冷媒量に応じて必要な容積を確保できればよく、室内機1側に設けてもよい。また、液管弁14は、室内機1と室外機2との間に設置しているが、室外機側に設けても良い。また、通常運転中、ガス管弁13および液管弁14は、開いた状態になっている。図1には示していないが、冷凍サイクル装置は、圧縮機5、四方弁6、ガス管弁13、液管弁14、膨張弁9、室外ファン8、室内ファン11、室内漏洩検知センサ12および室外漏洩検知センサ22に電気的に接続され、それぞれの機器を制御する制御装置を備えている。   The indoor heat exchanger 10, the expansion valve 9, the outdoor heat exchanger 7, the four-way valve 6 and the compressor 5 are connected by a pipe to constitute a refrigerant circuit. The pipe connecting the indoor heat exchanger 10 and the expansion valve 9 is the liquid pipe 4, the pipe connecting the indoor heat exchanger 10 and the compressor 5 is the gas pipe 3, and the pressure loss of the refrigerant circuit is reduced. In order to reduce, the cross-sectional area (here, the diameter) of the gas pipe 3 is larger than the cross-sectional area (here, the diameter) of the liquid pipe 4. Further, the refrigeration cycle apparatus is provided with a gas pipe valve 13, which is an electromagnetic on-off valve, between the indoor unit 1 and the outdoor unit 2 of the gas pipe 3, and electromagnetically between the indoor unit 1 and the outdoor unit 2 of the liquid pipe 4. A liquid pipe valve 14 which is an on-off valve is provided. Further, the indoor unit 1 is provided with an indoor leak detection sensor 12 for detecting refrigerant leakage, and the outdoor unit 2 is provided with an outdoor leak detection sensor 22 for detecting refrigerant leakage. In addition, the gas pipe valve 13 is installed between the indoor unit 1 and the outdoor unit 2 in FIG. 1, but it is sufficient that a necessary volume can be secured according to the amount of refrigerant to be recovered, and the gas pipe valve 13 is provided on the indoor unit 1 side. Also good. Moreover, although the liquid pipe valve 14 is installed between the indoor unit 1 and the outdoor unit 2, it may be provided on the outdoor unit side. Further, during normal operation, the gas pipe valve 13 and the liquid pipe valve 14 are open. Although not shown in FIG. 1, the refrigeration cycle apparatus includes a compressor 5, a four-way valve 6, a gas pipe valve 13, a liquid pipe valve 14, an expansion valve 9, an outdoor fan 8, an indoor fan 11, an indoor leak detection sensor 12, and A control device is provided that is electrically connected to the outdoor leak detection sensor 22 and controls each device.
図1に示す冷凍サイクル装置の通常時の運転動作について説明する。
まず、暖房運転の際の冷凍サイクル装置の動作について説明する。
圧縮機5で圧縮されたガス冷媒は、四方弁6を通り、実線で示すようにガス管3およびガス管弁13を経由して、室内熱交換器10に送られる。室内熱交換器10に送られたガス冷媒は、空気と熱交換し、液化される。室内熱交換器10で液化した冷媒は、液管4および液管弁14を経由して膨張弁9に送られ、膨張弁9で減圧される。膨張弁9で減圧され気液二相となった冷媒は、室外熱交換器7に送られ、空気と熱交換し、気化される。気化した冷媒は、四方弁6を通り圧縮機5に戻り、上記冷凍サイクルを繰り返す。
The normal operation of the refrigeration cycle apparatus shown in FIG. 1 will be described.
First, the operation of the refrigeration cycle apparatus during the heating operation will be described.
The gas refrigerant compressed by the compressor 5 passes through the four-way valve 6 and is sent to the indoor heat exchanger 10 via the gas pipe 3 and the gas pipe valve 13 as shown by a solid line. The gas refrigerant sent to the indoor heat exchanger 10 exchanges heat with air and is liquefied. The refrigerant liquefied in the indoor heat exchanger 10 is sent to the expansion valve 9 via the liquid pipe 4 and the liquid pipe valve 14, and decompressed by the expansion valve 9. The refrigerant that has been depressurized by the expansion valve 9 to become a gas-liquid two-phase is sent to the outdoor heat exchanger 7, where it exchanges heat with air and is vaporized. The vaporized refrigerant returns to the compressor 5 through the four-way valve 6 and repeats the refrigeration cycle.
次に、冷房運転の際の冷凍サイクル装置の動作について説明する。
圧縮機5で圧縮されたガス冷媒は、四方弁6を通り、破線で示すように室外熱交換器7に送られる。室内熱交換器7に送られたガス冷媒は、空気と熱交換し、液化される。室内熱交換器7で液化した冷媒は、膨張弁9に送られ、膨張弁9で減圧される。膨張弁9で減圧され気液二相となった冷媒は、液管4および液管弁14を経由して室内熱交換器10に送られ、空気と熱交換し、気化される。気化した冷媒は、ガス管3およびガス管弁13を通り圧縮機5に戻り、上記冷凍サイクルを繰り返す。
Next, the operation of the refrigeration cycle apparatus during the cooling operation will be described.
The gas refrigerant compressed by the compressor 5 passes through the four-way valve 6 and is sent to the outdoor heat exchanger 7 as indicated by a broken line. The gas refrigerant sent to the indoor heat exchanger 7 exchanges heat with air and is liquefied. The refrigerant liquefied by the indoor heat exchanger 7 is sent to the expansion valve 9 and decompressed by the expansion valve 9. The refrigerant that has been depressurized by the expansion valve 9 to become a gas-liquid two-phase is sent to the indoor heat exchanger 10 via the liquid pipe 4 and the liquid pipe valve 14, exchanges heat with air, and is vaporized. The vaporized refrigerant returns to the compressor 5 through the gas pipe 3 and the gas pipe valve 13, and repeats the refrigeration cycle.
以上に示すとおり、暖房運転の際には、室内熱交換器10の膨張弁9側から液管4内に液冷媒が存在している。また、冷房運転の際には、室内熱交換器10の膨張弁9側から液管4内に気液二相となった冷媒が存在している。一方、ガス管3には、暖房運転および冷房運転のいずれの場合もガス冷媒が存在しており、冷媒の物質量としては、暖房運転および冷房運転のいずれの場合もガス管3よりも液管4の方に多くの冷媒が存在している。   As described above, during the heating operation, liquid refrigerant exists in the liquid pipe 4 from the expansion valve 9 side of the indoor heat exchanger 10. Further, during the cooling operation, the refrigerant that has become a gas-liquid two-phase exists in the liquid pipe 4 from the expansion valve 9 side of the indoor heat exchanger 10. On the other hand, gas refrigerant is present in the gas pipe 3 in both the heating operation and the cooling operation, and the amount of refrigerant is more liquid than the gas pipe 3 in both the heating operation and the cooling operation. There are many refrigerants in the direction of 4.
暖房運転の際に冷媒の漏洩を検知した場合の冷凍サイクル装置の動作について、以下に説明する。
(1−1)暖房運転の際、室内漏洩検知センサ12が冷媒の漏洩を検知した場合
室内機1に設置された室内漏洩検知センサ12によって冷媒の漏洩が検知されると、制御装置は、ガス管弁13を閉として膨張弁9を全開とする。暖房運転の際に、室内熱交換器10の下流から液管4内に存在している液冷媒は、液管弁14、膨張弁9、室外熱交換器7および圧縮機5を通り、ガス管3に移動する。室内機1側の冷媒を液管4を介してガス管3に回収し、制御装置が、圧縮機5の吸入側に設けられた圧力計からの信号によって、圧縮機5の吸入圧力が所定の値より低くなったと判断した場合、液管弁14を閉とする。以上により、ガス管弁13の室内熱交換器10側から液管弁14の室内熱交換器10側までの間(ガス管弁13−室内熱交換器10−液管弁14の間)の冷媒のほとんどがガス管弁13と液管弁14との間(ガス管弁13−圧縮機5−室外熱交換器7−膨張弁9−液管弁14の間)に移動し、冷媒が室外機2側に回収される。
The operation of the refrigeration cycle apparatus when refrigerant leakage is detected during the heating operation will be described below.
(1-1) When the indoor leakage detection sensor 12 detects refrigerant leakage during heating operation When the refrigerant leakage is detected by the indoor leakage detection sensor 12 installed in the indoor unit 1, the control device The pipe valve 13 is closed and the expansion valve 9 is fully opened. During the heating operation, the liquid refrigerant present in the liquid pipe 4 from the downstream of the indoor heat exchanger 10 passes through the liquid pipe valve 14, the expansion valve 9, the outdoor heat exchanger 7 and the compressor 5, and passes through the gas pipe. Move to 3. The refrigerant on the indoor unit 1 side is collected in the gas pipe 3 via the liquid pipe 4, and the control device determines the suction pressure of the compressor 5 based on a signal from a pressure gauge provided on the suction side of the compressor 5. When it is determined that the value is lower than the value, the liquid pipe valve 14 is closed. By the above, the refrigerant | coolant between the indoor heat exchanger 10 side of the gas pipe valve 13 and the indoor heat exchanger 10 side of the liquid pipe valve 14 (between the gas pipe valve 13-indoor heat exchanger 10-liquid pipe valve 14). Most of the gas moves between the gas pipe valve 13 and the liquid pipe valve 14 (gas pipe valve 13-compressor 5-outdoor heat exchanger 7-expansion valve 9-liquid pipe valve 14), and the refrigerant moves to the outdoor unit. Collected on the 2 side.
以上より、本実施の形態に示す冷凍サイクル装置およびその制御方法では、暖房運転の際に室内漏洩検知センサ12が冷媒の漏洩を検知した場合に、室内熱交換器10の液管4内に存在している液冷媒が膨張弁9を介してガス管3側に速やかに移動するので、室内機1の冷媒を速やかにガス管3に回収できる。したがって、ガス管3側に存在するガス冷媒よりも物質量の多い液管4側に存在する冷媒を速やかに回収できるので、回収動作中の漏洩冷媒量も低減できる効果もある。   As described above, in the refrigeration cycle apparatus and the control method thereof shown in the present embodiment, when the indoor leakage detection sensor 12 detects refrigerant leakage during the heating operation, it exists in the liquid pipe 4 of the indoor heat exchanger 10. Since the liquid refrigerant being moved quickly moves to the gas pipe 3 side via the expansion valve 9, the refrigerant of the indoor unit 1 can be quickly collected in the gas pipe 3. Therefore, since the refrigerant existing on the liquid pipe 4 side having a larger amount of material than the gas refrigerant existing on the gas pipe 3 side can be recovered quickly, the leakage refrigerant amount during the recovery operation can also be reduced.
(1−2)暖房運転の際、室外漏洩検知センサ22が冷媒の漏洩を検知した場合
室外機2に設置された室外漏洩検知センサ22によって冷媒の漏洩が検知されると、制御装置は、液管弁14を閉として膨張弁9を全開とする。液管弁14の下流から液管4内に存在している液冷媒は、膨張弁9、室外熱交換器7、圧縮機5およびガス管3を通り、室内機1側に移動する。室外機2側の冷媒をガス管3を介して室内機1側に回収し、制御装置が、圧縮機5の吸入側に設けられた圧力計からの信号によって、圧縮機5の吸入圧力が所定の値より低くなったと判断した場合、ガス管弁13を閉とする。以上により、液管弁14の膨張弁9側からガス管弁13の圧縮機5側までの間(液管弁14−膨張弁9−室外熱交換器7−四方弁6−圧縮機5−ガス管弁13の間)の冷媒のほとんどが液管弁14とガス管弁13との間(液管弁14−室内熱交換器10−ガス管弁13の間)に移動し、室外機2側の冷媒が室内機1側に回収される。
以上より、本実施の形態に示す冷凍サイクル装置およびその制御方法では、暖房運転の際に室外漏洩検知センサ22が冷媒の漏洩を検知した場合も、室外機2側の冷媒を室内機1側に速やかに回収することができるので、回収動作中の漏洩冷媒量も低減できる。
(1-2) When the outdoor leakage detection sensor 22 detects the leakage of the refrigerant during the heating operation When the leakage of the refrigerant is detected by the outdoor leakage detection sensor 22 installed in the outdoor unit 2, the control device The pipe valve 14 is closed and the expansion valve 9 is fully opened. The liquid refrigerant present in the liquid pipe 4 from the downstream side of the liquid pipe valve 14 passes through the expansion valve 9, the outdoor heat exchanger 7, the compressor 5 and the gas pipe 3 and moves to the indoor unit 1 side. The refrigerant on the outdoor unit 2 side is collected on the indoor unit 1 side via the gas pipe 3, and the control device determines the suction pressure of the compressor 5 based on a signal from a pressure gauge provided on the suction side of the compressor 5. When it is determined that the value is lower than this value, the gas pipe valve 13 is closed. As described above, from the expansion valve 9 side of the liquid pipe valve 14 to the compressor 5 side of the gas pipe valve 13 (liquid pipe valve 14-expansion valve 9-outdoor heat exchanger 7-four-way valve 6-compressor 5-gas. Most of the refrigerant (between the pipe valve 13) moves between the liquid pipe valve 14 and the gas pipe valve 13 (between the liquid pipe valve 14-the indoor heat exchanger 10-the gas pipe valve 13), and the outdoor unit 2 side. The refrigerant is collected on the indoor unit 1 side.
As described above, in the refrigeration cycle apparatus and the control method thereof shown in the present embodiment, even when the outdoor leakage detection sensor 22 detects the leakage of the refrigerant during the heating operation, the refrigerant on the outdoor unit 2 side is moved to the indoor unit 1 side. Since it can collect | recover quickly, the amount of leaking refrigerant | coolants during collection | recovery operation | movement can also be reduced.
(1−3)冷房運転の際、室内漏洩検知センサ12が冷媒の漏洩を検知した場合
室内機1に設置された室内漏洩検知センサ12によって冷媒の漏洩が検知されると、制御装置は、液管弁14を閉じ、膨張弁9を全開にする。冷房運転の際に、液管4内に存在している気液二相の冷媒は、室内熱交換器10、ガス管3、ガス管弁13および圧縮機5を通り、室外機2側に移動する。室内機1側の冷媒をガス管3を介して室内機1側に回収し、制御装置が、圧縮機5の吸入側に設けられた圧力計からの信号によって、圧縮機5の吸入圧力が所定の値より低くなったと判断した場合、ガス管弁13を閉とする。以上により、液管弁14の室内熱交換器10側からガス管弁13の室内熱交換器10側までの間(液管弁14−室内熱交換器10−ガス管弁13の間)の冷媒のほとんどが液管弁14とガス管弁13との間(液管弁14−膨張弁9−室外熱交換器7−四方弁6−圧縮機5−ガス管弁13の間)に移動し、室内機1側の冷媒が室外機2側に回収される。
以上より、本実施の形態に示す冷凍サイクル装置およびその制御方法では、冷房運転の際に室内漏洩検知センサ12が冷媒の漏洩を検知した場合も、室内機1側の冷媒を室外機2側に速やかに回収することができるので、回収動作中の漏洩冷媒量も低減できる。
(1-3) When the indoor leakage detection sensor 12 detects the leakage of the refrigerant during the cooling operation When the leakage of the refrigerant is detected by the indoor leakage detection sensor 12 installed in the indoor unit 1, the control device The pipe valve 14 is closed and the expansion valve 9 is fully opened. During the cooling operation, the gas-liquid two-phase refrigerant present in the liquid pipe 4 passes through the indoor heat exchanger 10, the gas pipe 3, the gas pipe valve 13 and the compressor 5 and moves to the outdoor unit 2 side. To do. The refrigerant on the indoor unit 1 side is collected on the indoor unit 1 side via the gas pipe 3, and the control device determines the suction pressure of the compressor 5 based on a signal from a pressure gauge provided on the suction side of the compressor 5. When it is determined that the value is lower than this value, the gas pipe valve 13 is closed. By the above, the refrigerant | coolant between the indoor heat exchanger 10 side of the liquid pipe valve 14 and the indoor heat exchanger 10 side of the gas pipe valve 13 (between the liquid pipe valve 14-indoor heat exchanger 10-gas pipe valve 13). Most of the gas moves between the liquid pipe valve 14 and the gas pipe valve 13 (the liquid pipe valve 14-expansion valve 9-outdoor heat exchanger 7-four-way valve 6-compressor 5-gas pipe valve 13), The refrigerant on the indoor unit 1 side is collected on the outdoor unit 2 side.
As described above, in the refrigeration cycle apparatus and the control method thereof shown in the present embodiment, even when the indoor leakage detection sensor 12 detects the leakage of the refrigerant during the cooling operation, the refrigerant on the indoor unit 1 side is moved to the outdoor unit 2 side. Since it can collect | recover quickly, the amount of leaking refrigerant | coolants during collection | recovery operation | movement can also be reduced.
(1−4)冷房運転の際、室外漏洩検知センサ22が冷媒の漏洩を検知した場合
室外機2に設置された室内漏洩検知センサ22によって冷媒の漏洩が検知されると、制御装置は、圧縮機5を停止し、膨張弁9を全開にする。冷房運転の際に、室外熱交換器7の下流から膨張弁9に存在している液冷媒は、液管弁14を通り、液管4に移動し、回収される。制御装置が、圧縮機5の吸入側に設けられた圧力計からの信号によって、圧縮機5の吸入圧力が所定の値より高くなったと判断した場合、液管弁14を閉じる。その後、四方弁6を暖房運転に切り替えて圧縮機5を運転する。制御装置が、圧縮機5の吸入側に設けられた圧力計からの信号によって、圧縮機5の吸入圧力が所定の値より低くなったと判断した場合、ガス管弁13を閉じる。以上により、室外機2側におけるガス管弁13と液管弁14との間(ガス管弁13−圧縮機5−四方弁6−室外熱交換器7−膨張弁9−液管弁14)の冷媒のほとんどが液管弁14とガス管弁13との間(液管弁14−室内熱交換器10−ガス管弁13)に移動し、室外機2側の冷媒が室内機1側に回収される。
以上より、本実施の形態に示す冷凍サイクル装置およびその制御方法では、冷房運転の際に室外漏洩検知センサ22が冷媒の漏洩を検知した場合も、室外機2側の冷媒を室内機1側に速やかに回収することができるので、回収動作中の漏洩冷媒量も低減できる。
(1-4) When the outdoor leakage detection sensor 22 detects the leakage of the refrigerant during the cooling operation When the leakage of the refrigerant is detected by the indoor leakage detection sensor 22 installed in the outdoor unit 2, the control device compresses the refrigerant. The machine 5 is stopped and the expansion valve 9 is fully opened. During the cooling operation, the liquid refrigerant present in the expansion valve 9 from the downstream of the outdoor heat exchanger 7 passes through the liquid pipe valve 14 and moves to the liquid pipe 4 to be recovered. When the control device determines from the signal from the pressure gauge provided on the suction side of the compressor 5 that the suction pressure of the compressor 5 has become higher than a predetermined value, the liquid pipe valve 14 is closed. Thereafter, the four-way valve 6 is switched to the heating operation, and the compressor 5 is operated. When the control device determines that the suction pressure of the compressor 5 has become lower than a predetermined value based on a signal from a pressure gauge provided on the suction side of the compressor 5, the gas pipe valve 13 is closed. By the above, between the gas pipe valve 13 and the liquid pipe valve 14 in the outdoor unit 2 side (gas pipe valve 13-compressor 5-four-way valve 6-outdoor heat exchanger 7-expansion valve 9-liquid pipe valve 14). Most of the refrigerant moves between the liquid pipe valve 14 and the gas pipe valve 13 (liquid pipe valve 14 -indoor heat exchanger 10 -gas pipe valve 13), and the refrigerant on the outdoor unit 2 side is collected on the indoor unit 1 side. Is done.
As described above, in the refrigeration cycle apparatus and the control method thereof shown in the present embodiment, even when the outdoor leakage detection sensor 22 detects the leakage of the refrigerant during the cooling operation, the refrigerant on the outdoor unit 2 side is moved to the indoor unit 1 side. Since it can collect | recover quickly, the amount of leaking refrigerant | coolants during collection | recovery operation | movement can also be reduced.
なお、本実施の形態では、冷凍サイクル装置は、R410A等の暖房運転の際に室内熱交換器10(冷房運転の際に室外熱交換器7)で凝縮液化する冷媒を使用するとして記載した。二酸化炭素などの凝縮液化せずに超臨界状態となる冷媒でも、本実施の形態に示す冷凍サイクル装置は、冷媒を速やかに回収できるので回収動作中の漏洩冷媒量も低減できる効果がある。   In the present embodiment, the refrigeration cycle apparatus is described as using a refrigerant that condenses and liquefies in the indoor heat exchanger 10 (outdoor heat exchanger 7 in the cooling operation) during the heating operation such as R410A. Even in the refrigerant that is in a supercritical state without being condensed into liquid such as carbon dioxide, the refrigeration cycle apparatus shown in the present embodiment has an effect of reducing the amount of refrigerant leaked during the recovery operation because the refrigerant can be recovered quickly.
また、本実施の形態では、圧縮機5の吸入側に設けられた圧力計からの信号によって、冷媒を(を→の)回収等を判断したが、事前に実験で圧縮機5の吸入圧力が所定の圧力になるまでの時間を測定し、当該所定の時間を経過した場合に、圧縮機5の吸入圧力が所定の値になったとして冷媒の回収等を判断してもよい。
また、本実施の形態では、四方弁6を設け、冷房運転と暖房運転とを切り替える冷凍サイクル装置を示したが、四方弁を設けずに暖房運転のみを行う冷凍サイクル装置においても、同様の構成および上記(1−1)および(1−2)に示す動作によって、本実施の形態に示す冷凍サイクル装置と同様の効果を奏する。
In the present embodiment, the recovery of the refrigerant is determined by a signal from a pressure gauge provided on the suction side of the compressor 5, but the suction pressure of the compressor 5 is experimentally determined in advance. The time until a predetermined pressure is reached may be measured, and when the predetermined time has elapsed, recovery of the refrigerant or the like may be determined by assuming that the suction pressure of the compressor 5 has reached a predetermined value.
Further, in the present embodiment, the four-way valve 6 is provided and the refrigeration cycle apparatus that switches between the cooling operation and the heating operation is shown. The operations shown in (1-1) and (1-2) provide the same effects as those of the refrigeration cycle apparatus shown in the present embodiment.
実施の形態2.
図2は、この発明の実施の形態2による冷凍サイクル装置の構成を示す概略図である。本実施の形態に示す冷凍サイクル装置は、圧縮機の吸入側の配管に設けられる吸入弁16、圧縮機5と吸入弁16との間の配管および液管弁14と室内熱交換器10との間の液管4とを接続するバイパス管18、このバイパス管18に設けられるバイパス弁17を備えている点が実施の形態1に示す冷凍サイクル装置と異なっている。その他の構成および機能は、実施の形態1に示す冷凍サイクル装置と同様であり、この実施の形態2による冷凍サイクル装置の通常運転の際の動作は、実施の形態1に示す冷凍サイクル装置と同様である。したがって、通常運転の際、吸入弁16は開いており、バイパス弁17は閉じている。
室内漏洩検知センサ12および室外漏洩検知センサ22の両方が冷媒の漏洩を検知した場合の冷凍サイクル装置の動作について、以下に説明する。なお、室内漏洩検知センサ12のみが冷媒の漏洩を検知した場合の冷凍サイクル装置の動作は、実施の形態1に示した冷凍サイクル装置の動作と同様である。
Embodiment 2. FIG.
FIG. 2 is a schematic diagram showing a configuration of a refrigeration cycle apparatus according to Embodiment 2 of the present invention. The refrigeration cycle apparatus shown in the present embodiment includes a suction valve 16 provided in a pipe on the suction side of the compressor, a pipe between the compressor 5 and the suction valve 16, a liquid pipe valve 14, and the indoor heat exchanger 10. It differs from the refrigeration cycle apparatus shown in Embodiment 1 in that a bypass pipe 18 connecting the liquid pipe 4 between them and a bypass valve 17 provided in the bypass pipe 18 are provided. Other configurations and functions are the same as those of the refrigeration cycle apparatus shown in the first embodiment, and operations during the normal operation of the refrigeration cycle apparatus according to the second embodiment are the same as those of the refrigeration cycle apparatus shown in the first embodiment. It is. Therefore, during normal operation, the intake valve 16 is open and the bypass valve 17 is closed.
The operation of the refrigeration cycle apparatus when both the indoor leakage detection sensor 12 and the outdoor leakage detection sensor 22 detect refrigerant leakage will be described below. Note that the operation of the refrigeration cycle apparatus when only the indoor leakage detection sensor 12 detects the leakage of the refrigerant is the same as the operation of the refrigeration cycle apparatus shown in the first embodiment.
(2−1)暖房運転の際、室内漏洩検知センサ12および室外漏洩検知センサ22の両方が冷媒の漏洩を検知した場合
室内機1に設置された室内漏洩検知センサ12および室外機2に設置された室外漏洩検知センサ22の両方によって冷媒の漏洩が検知されると、制御装置は、ガス管弁13および液管弁14を閉じ、バイパス弁17を開け、膨張弁9を全開とする。暖房運転の際に、室内熱交換器10の下流から液管4内に存在している液冷媒は、バイパス管18、バイパス弁17および圧縮機5を通り、ガス管3に移動する。また、室外機2側の冷媒は、膨張弁9、室外熱交換器7、四方弁6、吸入弁16および圧縮機5を通り、ガス管3に移動する。室内機1側の冷媒および室外機2側の冷媒をガス管3に回収し、制御装置が、圧縮機5の吸入側に設けられた圧力計からの信号によって、圧縮機5の吸入圧力が所定の値より低くなったと判断した場合、吸入弁16およびバイパス弁17を閉とする。以上により、室内機1側の冷媒および室外機2側の冷媒が室外機2側に回収される。
(2-1) When the indoor leakage detection sensor 12 and the outdoor leakage detection sensor 22 both detect refrigerant leakage during the heating operation, the indoor leakage detection sensor 12 installed in the indoor unit 1 and the outdoor unit 2 are installed. When the refrigerant leakage is detected by both the outdoor leakage detection sensors 22, the control device closes the gas pipe valve 13 and the liquid pipe valve 14, opens the bypass valve 17, and fully opens the expansion valve 9. During the heating operation, the liquid refrigerant present in the liquid pipe 4 from the downstream of the indoor heat exchanger 10 passes through the bypass pipe 18, the bypass valve 17 and the compressor 5 and moves to the gas pipe 3. The refrigerant on the outdoor unit 2 side passes through the expansion valve 9, the outdoor heat exchanger 7, the four-way valve 6, the suction valve 16 and the compressor 5 and moves to the gas pipe 3. The refrigerant on the indoor unit 1 side and the refrigerant on the outdoor unit 2 side are collected in the gas pipe 3, and the control device determines the suction pressure of the compressor 5 based on a signal from a pressure gauge provided on the suction side of the compressor 5. When it is determined that the value is lower than the value of, the intake valve 16 and the bypass valve 17 are closed. As described above, the refrigerant on the indoor unit 1 side and the refrigerant on the outdoor unit 2 side are collected on the outdoor unit 2 side.
本実施の形態2に示す冷凍サイクル装置およびその制御方法では、暖房運転の際に室内漏洩検知センサ12および室外漏洩検知センサ22の両方が冷媒の漏洩を検知した場合に、室内熱交換器10の液管4内に存在している液冷媒がバイパス管18およびバイパス弁17を介してガス管3側に速やかに移動するので、室内機1の冷媒を速やかにガス管3に回収できる。したがって、ガス管3側に存在するガス冷媒よりも物質量の多い液管4側に存在する冷媒を速やかに回収できるので、回収動作中の漏洩冷媒量も低減できる効果もある。また、冷媒を液管4よりも流路断面積の大きいガス管3側に回収するため、室内機1側および室外機2側の両方から冷媒が漏れた場合でも、多くの冷媒をガス管3に回収することができ、漏洩冷媒量を低減できる。   In the refrigeration cycle apparatus and the control method thereof shown in the second embodiment, when both the indoor leakage detection sensor 12 and the outdoor leakage detection sensor 22 detect refrigerant leakage during heating operation, the indoor heat exchanger 10 Since the liquid refrigerant existing in the liquid pipe 4 quickly moves to the gas pipe 3 side via the bypass pipe 18 and the bypass valve 17, the refrigerant in the indoor unit 1 can be quickly collected in the gas pipe 3. Therefore, since the refrigerant existing on the liquid pipe 4 side having a larger amount of material than the gas refrigerant existing on the gas pipe 3 side can be recovered quickly, the leakage refrigerant amount during the recovery operation can also be reduced. Further, since the refrigerant is recovered to the gas pipe 3 side having a larger flow path cross-sectional area than the liquid pipe 4, even when the refrigerant leaks from both the indoor unit 1 side and the outdoor unit 2 side, a large amount of refrigerant is passed through the gas pipe 3 The amount of refrigerant leaked can be reduced.
(2−2)冷房運転の際、室内漏洩検知センサ12および室外漏洩検知センサ22の両方が冷媒の漏洩を検知した場合
室内機1に設置された室内漏洩検知センサ12および室外機2に設置された室外漏洩検知センサ22の両方によって冷媒の漏洩が検知されると、制御装置は、圧縮機5を停止しガス管弁13を閉とし、膨張弁9を全開とする。室外熱交換器7の下流から膨張弁9に存在している液冷媒は、液管弁14を通り、液管4に移動し、回収される。制御装置が、圧縮機5の吸入側に設けられた圧力計からの信号によって、圧縮機5の吸入圧力が所定の値より高くなったと判断した場合、液管弁14を閉じる。その後、四方弁6を暖房運転に切り替えて圧縮機5を運転し、バイパス弁を開とする。制御装置が、圧縮機5の吸入側に設けられた圧力計からの信号によって、圧縮機5の吸入圧力が所定の値より低くなったと判断した場合、吸入弁16およびバイパス弁17を閉じる。以上により、室内機1側の冷媒および室外機2側の冷媒が室外機2側に回収される。
(2-2) When cooling operation is performed, both the indoor leakage detection sensor 12 and the outdoor leakage detection sensor 22 detect refrigerant leakage. The indoor leakage detection sensor 12 installed in the indoor unit 1 and the outdoor unit 2 are installed. When the refrigerant leakage is detected by both the outdoor leakage detection sensors 22, the control device stops the compressor 5, closes the gas pipe valve 13, and fully opens the expansion valve 9. The liquid refrigerant present in the expansion valve 9 from the downstream of the outdoor heat exchanger 7 passes through the liquid pipe valve 14 and moves to the liquid pipe 4 to be recovered. When the control device determines from the signal from the pressure gauge provided on the suction side of the compressor 5 that the suction pressure of the compressor 5 has become higher than a predetermined value, the liquid pipe valve 14 is closed. Thereafter, the four-way valve 6 is switched to the heating operation, the compressor 5 is operated, and the bypass valve is opened. When the control device determines from the signal from the pressure gauge provided on the suction side of the compressor 5 that the suction pressure of the compressor 5 has become lower than a predetermined value, the suction valve 16 and the bypass valve 17 are closed. As described above, the refrigerant on the indoor unit 1 side and the refrigerant on the outdoor unit 2 side are collected on the outdoor unit 2 side.
本実施の形態2に示す冷凍サイクル装置およびその制御方法では、冷房運転の際に室内漏洩検知センサ12および室外漏洩検知センサ22の両方が冷媒の漏洩を検知した場合に、室外熱交換器7の下流から液管4内に存在している液冷媒がバイパス管18およびバイパス弁17を介してガス管3側に速やかに移動する。したがって、ガス管3側に存在するガス冷媒よりも物質量の多い液管4側に存在する冷媒を速やかに回収できるので、回収動作中の漏洩冷媒量も低減できる効果もある。また、冷媒を液管4よりも流路断面積の大きいガス管3側に回収するため、室内機1側および室外機2側の両方から冷媒が漏れた場合でも、多くの冷媒をガス管3に回収することができ、漏洩冷媒量を低減できる。   In the refrigeration cycle apparatus and the control method thereof shown in the second embodiment, when both the indoor leakage detection sensor 12 and the outdoor leakage detection sensor 22 detect refrigerant leakage during the cooling operation, the outdoor heat exchanger 7 The liquid refrigerant existing in the liquid pipe 4 from the downstream quickly moves to the gas pipe 3 side via the bypass pipe 18 and the bypass valve 17. Therefore, since the refrigerant existing on the liquid pipe 4 side having a larger amount of material than the gas refrigerant existing on the gas pipe 3 side can be recovered quickly, the leakage refrigerant amount during the recovery operation can also be reduced. Further, since the refrigerant is recovered to the gas pipe 3 side having a larger flow path cross-sectional area than the liquid pipe 4, even when the refrigerant leaks from both the indoor unit 1 side and the outdoor unit 2 side, a large amount of refrigerant is passed through the gas pipe 3 The amount of refrigerant leaked can be reduced.
1 室内機、2 室外機、3 ガス管、4 液管、5 圧縮機、6 四方弁、7 室外熱交換器、8 室外ファン、9 膨張弁、10 室内熱交換器、11 室内ファン、12 室内漏洩検知センサ、13 ガス管弁、14 液管弁、16 吸入弁、17 バイパス弁、18 バイパス管、22 室外漏洩検知センサ。   1 indoor unit, 2 outdoor unit, 3 gas pipe, 4 liquid pipe, 5 compressor, 6 four-way valve, 7 outdoor heat exchanger, 8 outdoor fan, 9 expansion valve, 10 indoor heat exchanger, 11 indoor fan, 12 indoor Leak detection sensor, 13 gas pipe valve, 14 liquid pipe valve, 16 suction valve, 17 bypass valve, 18 bypass pipe, 22 outdoor leak detection sensor.

Claims (11)

  1. 冷媒を圧縮する圧縮機、前記冷媒と室内の空気とを熱交換する室内熱交換器、冷媒を膨張する膨張弁、および前記冷媒と室外の空気とを熱交換する室外熱交換器が配管で接続され、前記室内熱交換器は室内に設置される室内機に設けられ、前記圧縮機、前記膨張弁、および前記室外熱交換器は室外に設置される室外機に設けられる冷凍サイクル装置において、
    前記室内熱交換器と前記膨張弁との間を接続する配管である液管、
    前記圧縮機と前記室内熱交換器との間を接続する配管であるガス管、
    前記液管に設けられる液管弁、
    前記ガス管に設けられるガス管弁、
    前記室内に設けられ前記冷媒の漏洩を検知する室内漏洩検知センサ、
    および暖房運転の際に前記室内漏洩検知センサが前記冷媒の漏洩を検知した場合に、前記ガス管弁を閉じ、前記室内機側の冷媒を回収した後に前記液管弁を閉じる制御装置を備えたことを特徴とする冷凍サイクル装置。
    A compressor that compresses the refrigerant, an indoor heat exchanger that exchanges heat between the refrigerant and indoor air, an expansion valve that expands the refrigerant, and an outdoor heat exchanger that exchanges heat between the refrigerant and outdoor air are connected by piping. The indoor heat exchanger is provided in an indoor unit installed indoors, and the compressor, the expansion valve, and the outdoor heat exchanger are provided in an outdoor unit installed outdoor, in a refrigeration cycle apparatus,
    A liquid pipe that is a pipe connecting the indoor heat exchanger and the expansion valve;
    A gas pipe which is a pipe connecting between the compressor and the indoor heat exchanger;
    A liquid pipe valve provided in the liquid pipe,
    A gas pipe valve provided in the gas pipe,
    An indoor leakage detection sensor provided in the room for detecting leakage of the refrigerant;
    And a control device that closes the gas pipe valve and collects the refrigerant on the indoor unit side and then closes the liquid pipe valve when the indoor leak detection sensor detects leakage of the refrigerant during heating operation. A refrigeration cycle apparatus characterized by that.
  2. 冷媒を圧縮する圧縮機、前記冷媒と室内の空気とを熱交換する室内熱交換器、冷媒を膨張する膨張弁、前記冷媒と室外の空気とを熱交換する室外熱交換器および冷房運転の際には前記圧縮機の吐出側から前記室外熱交換器へ冷媒が流れるよう流路を構成するとともに暖房運転の際には前記圧縮機の吐出側から前記室内熱交換器へ前記冷媒が流れるよう流路を構成する四方弁が配管で接続され、前記室内熱交換器は室内に設置される室内機に設けられ、前記圧縮機、前記膨張弁、前記室外熱交換器および前記四方弁は室外に設置される室外機に設けられる冷凍サイクル装置において、
    前記室内熱交換器と前記膨張弁との間を接続する配管である液管、
    前記圧縮機と前記室内熱交換器との間を接続する配管であるガス管、
    前記液管に設けられる液管弁、
    前記ガス管に設けられるガス管弁、
    前記室内に設けられ前記冷媒の漏洩を検知する室内漏洩検知センサ、
    および暖房運転の際に前記室内漏洩検知センサが前記冷媒の漏洩を検知した場合に、前記ガス管弁を閉じ、前記室内機側の冷媒を回収した後に前記液管弁を閉じる制御装置を備えたことを特徴とする冷凍サイクル装置。
    A compressor that compresses the refrigerant, an indoor heat exchanger that exchanges heat between the refrigerant and indoor air, an expansion valve that expands the refrigerant, an outdoor heat exchanger that exchanges heat between the refrigerant and outdoor air, and cooling operation In this case, a flow path is formed so that the refrigerant flows from the discharge side of the compressor to the outdoor heat exchanger, and the refrigerant flows from the discharge side of the compressor to the indoor heat exchanger during heating operation. A four-way valve constituting a passage is connected by piping, the indoor heat exchanger is provided in an indoor unit installed indoors, and the compressor, the expansion valve, the outdoor heat exchanger, and the four-way valve are installed outdoor In the refrigeration cycle apparatus provided in the outdoor unit to be
    A liquid pipe that is a pipe connecting the indoor heat exchanger and the expansion valve;
    A gas pipe which is a pipe connecting between the compressor and the indoor heat exchanger;
    A liquid pipe valve provided in the liquid pipe,
    A gas pipe valve provided in the gas pipe,
    An indoor leakage detection sensor provided in the room for detecting leakage of the refrigerant;
    And a control device that closes the gas pipe valve and collects the refrigerant on the indoor unit side and then closes the liquid pipe valve when the indoor leak detection sensor detects leakage of the refrigerant during heating operation. A refrigeration cycle apparatus characterized by that.
  3. 冷凍サイクル装置は、室外機に設けられ冷媒の漏洩を検知する室外漏洩検知センサ、圧縮機の吸入側の配管に設けられる吸入弁、前記圧縮機および前記吸入弁の間の配管と液管弁および室内熱交換器の間の液管とを接続するバイパス管、および前記バイパス管に設けられるバイパス弁を備え、
    制御装置は、暖房運転の際に、室内漏洩検知センサおよび前記室外漏洩検知センサが冷媒の漏洩を検知した場合に、前記バイパス弁を開け、膨張弁を全開とし、冷媒をガス管に回収した後に前記バイパス弁および前記吸入弁を閉じることを特徴とする請求項1または2に記載の冷凍サイクル装置。
    The refrigeration cycle apparatus includes an outdoor leak detection sensor provided in the outdoor unit for detecting refrigerant leakage, a suction valve provided in a suction side pipe of the compressor, a pipe and a liquid pipe valve between the compressor and the suction valve, and A bypass pipe connecting a liquid pipe between the indoor heat exchangers, and a bypass valve provided in the bypass pipe;
    When the indoor leakage detection sensor and the outdoor leakage detection sensor detect refrigerant leakage during heating operation, the control device opens the bypass valve, fully opens the expansion valve, and collects the refrigerant in the gas pipe. The refrigeration cycle apparatus according to claim 1, wherein the bypass valve and the suction valve are closed.
  4. 冷媒を圧縮する圧縮機、前記冷媒と室内の空気とを熱交換する室内熱交換器、冷媒を膨張する膨張弁、および前記冷媒と室外の空気とを熱交換する室外熱交換器が配管で接続され、前記室内熱交換器は室内に設置される室内機に設けられ、前記圧縮機、前記膨張弁、および前記室外熱交換器は室外に設置される室外機に設けられ、前記室内熱交換器と前記膨張弁との間を接続する配管である液管、前記圧縮機と前記室内熱交換器との間を接続する配管であるガス管、前記液管に設けられる液管弁、前記ガス管に設けられるガス管弁、前記室内に設けられ前記冷媒の漏洩を検知する室内漏洩検知センサを備えた冷凍サイクル装置の制御方法において、
    暖房運転の際に前記室内漏洩検知センサが前記冷媒の漏洩を検知した場合に、前記ガス管弁を閉じ、前記室内機側の冷媒を回収した後に前記液管弁を閉じることを特徴とする冷凍サイクル装置の制御方法。
    A compressor that compresses the refrigerant, an indoor heat exchanger that exchanges heat between the refrigerant and indoor air, an expansion valve that expands the refrigerant, and an outdoor heat exchanger that exchanges heat between the refrigerant and outdoor air are connected by piping. The indoor heat exchanger is provided in an indoor unit installed indoors, and the compressor, the expansion valve, and the outdoor heat exchanger are provided in an outdoor unit installed outdoor, the indoor heat exchanger And a liquid pipe that is a pipe connecting between the compressor and the indoor heat exchanger, a gas pipe that is a pipe connecting the compressor and the indoor heat exchanger, a liquid pipe valve provided in the liquid pipe, and the gas pipe In the control method of the refrigeration cycle apparatus provided with the gas pipe valve provided in the room, the indoor leak detection sensor provided in the room and detecting the leakage of the refrigerant,
    When the indoor leak detection sensor detects leakage of the refrigerant during heating operation, the gas pipe valve is closed, and the liquid pipe valve is closed after collecting the refrigerant on the indoor unit side. Control method for cycle equipment.
  5. 冷媒を圧縮する圧縮機、前記冷媒と室内の空気とを熱交換する室内熱交換器、冷媒を膨張する膨張弁、前記冷媒と室外の空気とを熱交換する室外熱交換器および冷房運転の際には前記圧縮機の吐出側から前記室外熱交換器へ冷媒が流れるよう流路を構成するとともに暖房運転の際には前記圧縮機の吐出側から前記室内熱交換器へ前記冷媒が流れるよう流路を構成する四方弁が配管で接続され、前記室内熱交換器は室内に設置される室内機に設けられ、前記圧縮機、前記膨張弁、前記室外熱交換器および前記四方弁は室外に設置される室外機に設けられ、前記室内熱交換器と前記膨張弁との間を接続する配管である液管、前記圧縮機と前記室内熱交換器との間を接続する配管であるガス管、前記液管に設けられる液管弁、前記ガス管に設けられるガス管弁、前記室内に設けられ前記冷媒の漏洩を検知する室内漏洩検知センサを備えた冷凍サイクル装置の制御方法において、
    暖房運転の際に前記室内漏洩検知センサが前記冷媒の漏洩を検知した場合に、前記ガス管弁を閉じ、前記室内機側の冷媒を回収した後に前記液管弁を閉じることを特徴とする冷凍サイクル装置の制御方法。
    A compressor that compresses the refrigerant, an indoor heat exchanger that exchanges heat between the refrigerant and indoor air, an expansion valve that expands the refrigerant, an outdoor heat exchanger that exchanges heat between the refrigerant and outdoor air, and cooling operation In this case, a flow path is formed so that the refrigerant flows from the discharge side of the compressor to the outdoor heat exchanger, and the refrigerant flows from the discharge side of the compressor to the indoor heat exchanger during heating operation. A four-way valve constituting a passage is connected by piping, the indoor heat exchanger is provided in an indoor unit installed indoors, and the compressor, the expansion valve, the outdoor heat exchanger, and the four-way valve are installed outdoor A liquid pipe that is a pipe that connects between the indoor heat exchanger and the expansion valve, a gas pipe that is a pipe that connects between the compressor and the indoor heat exchanger, Liquid pipe valve provided in the liquid pipe, provided in the gas pipe Gas pipe valve, the control method of the refrigeration cycle apparatus having an indoor leak detection sensor for detecting the leakage of the refrigerant is provided in the chamber,
    When the indoor leakage detection sensor detects leakage of the refrigerant during heating operation, the gas pipe valve is closed, and after the refrigerant on the indoor unit side is recovered, the liquid pipe valve is closed. Control method for cycle equipment.
  6. 冷凍サイクル装置は、室外機に設けられ冷媒の漏洩を検知する室外漏洩検知センサを備え、
    暖房運転の際に前記室外漏洩検知センサが前記冷媒の漏洩を検知した場合に、液管弁を閉じ、室内機側の冷媒を回収した後に前記液管弁を閉じることを特徴とする請求項4または5に記載の冷凍サイクル装置の制御方法。
    The refrigeration cycle apparatus includes an outdoor leakage detection sensor that is provided in the outdoor unit and detects leakage of refrigerant,
    5. The liquid pipe valve is closed when the outdoor leakage detection sensor detects leakage of the refrigerant during heating operation, and the liquid pipe valve is closed after the refrigerant on the indoor unit side is recovered. Or the control method of the refrigerating-cycle apparatus of 5.
  7. 冷房運転の際に室内漏洩検知センサが冷媒の漏洩を検知した場合に、液管弁を閉じ、室内機側の冷媒を回収した後にガス管弁を閉じることを特徴とする請求項5に記載の冷凍サイクル装置の制御方法。   6. The liquid pipe valve is closed when the indoor leakage detection sensor detects refrigerant leakage during cooling operation, and the gas pipe valve is closed after collecting the refrigerant on the indoor unit side. Control method of refrigeration cycle apparatus.
  8. 冷凍サイクル装置は、室外機に設けられ冷媒の漏洩を検知する室外漏洩検知センサを備え、
    冷房運転の際に前記室外漏洩検知センサが前記冷媒の漏洩を検知した場合に、圧縮機を停止して膨張弁を全開にした後に液管弁を閉じ、四方弁を暖房運転に切り替えた後に前記圧縮機を運転し、室外機側の冷媒を回収した後にガス管弁を閉じることを特徴とする請求項5に記載の冷凍サイクル装置の制御方法。
    The refrigeration cycle apparatus includes an outdoor leakage detection sensor that is provided in the outdoor unit and detects leakage of refrigerant,
    When the outdoor leakage detection sensor detects leakage of the refrigerant during cooling operation, the compressor is stopped and the expansion valve is fully opened, the liquid pipe valve is closed, and the four-way valve is switched to heating operation. 6. The method for controlling a refrigeration cycle apparatus according to claim 5, wherein the gas pipe valve is closed after operating the compressor and collecting the refrigerant on the outdoor unit side.
  9. 冷凍サイクル装置は、室外機に設けられ冷媒の漏洩を検知する室外漏洩検知センサ、圧縮機の吸入側の配管に設けられる吸入弁、前記圧縮機および前記吸入弁の間の配管と液管弁および室内熱交換器の間の液管とを接続するバイパス管、および前記バイパス管に設けられるバイパス弁を備え、
    暖房運転の際に、室内漏洩検知センサおよび前記室外漏洩検知センサが冷媒の漏洩を検知した場合に、前記バイパス弁を開け、膨張弁を全開とし、冷媒をガス管に回収した後に前記バイパス弁および前記吸入弁を閉じることを特徴とする請求項4または5に記載の冷凍サイクル装置の制御方法。
    The refrigeration cycle apparatus includes an outdoor leak detection sensor provided in the outdoor unit for detecting refrigerant leakage, a suction valve provided in a suction side pipe of the compressor, a pipe and a liquid pipe valve between the compressor and the suction valve, and A bypass pipe connecting a liquid pipe between the indoor heat exchangers, and a bypass valve provided in the bypass pipe;
    When the indoor leakage detection sensor and the outdoor leakage detection sensor detect refrigerant leakage during heating operation, the bypass valve is opened after the bypass valve is opened, the expansion valve is fully opened, and the refrigerant is collected in the gas pipe. The method for controlling a refrigeration cycle apparatus according to claim 4 or 5, wherein the suction valve is closed.
  10. 冷凍サイクル装置は、室外機に設けられ冷媒の漏洩を検知する室外漏洩検知センサ、
    圧縮機の吸入側の配管に設けられる吸入弁、
    前記圧縮機と前記吸入弁との間の配管と液管とを接続するバイパス管、
    前記バイパス管に設けられるバイパス弁を備え、
    冷房運転の際に、室内漏洩検知センサおよび前記室外漏洩検知センサが冷媒の漏洩を検知した場合に、ガス管弁を閉じ、圧縮機を停止して膨張弁を全開にした後に液管弁を閉じ、四方弁を暖房運転に切り替えた後に前記圧縮機を運転し、前記バイパス弁を開け、冷媒をガス管に回収した後に前記バイパス弁および前記吸入弁を閉じることを特徴とする請求項5に記載の冷凍サイクル装置の制御方法。
    The refrigeration cycle apparatus includes an outdoor leakage detection sensor that is provided in the outdoor unit and detects refrigerant leakage,
    A suction valve provided in the piping on the suction side of the compressor;
    A bypass pipe connecting a pipe and a liquid pipe between the compressor and the suction valve;
    A bypass valve provided in the bypass pipe,
    During cooling operation, when the indoor leakage detection sensor and the outdoor leakage detection sensor detect refrigerant leakage, the gas pipe valve is closed, the compressor is stopped, the expansion valve is fully opened, and then the liquid pipe valve is closed. 6. The compressor is operated after switching the four-way valve to heating operation, the bypass valve is opened, the refrigerant is collected in a gas pipe, and then the bypass valve and the intake valve are closed. Method for controlling the refrigeration cycle apparatus.
  11. 冷凍サイクル装置は、圧縮機の吸入側の配管に圧力センサを備え、
    前記圧力センサの値に基づいて冷媒を回収したと判断することを特徴とする請求項4から10のいずれか1項に記載の冷凍サイクル装置の制御方法。
    The refrigeration cycle apparatus includes a pressure sensor in a pipe on the suction side of the compressor,
    The method for controlling a refrigeration cycle apparatus according to any one of claims 4 to 10, wherein it is determined that the refrigerant has been recovered based on a value of the pressure sensor.
JP2009168140A 2009-07-16 2009-07-16 Refrigeration cycle apparatus and control method of refrigeration cycle apparatus Active JP5481981B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009168140A JP5481981B2 (en) 2009-07-16 2009-07-16 Refrigeration cycle apparatus and control method of refrigeration cycle apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009168140A JP5481981B2 (en) 2009-07-16 2009-07-16 Refrigeration cycle apparatus and control method of refrigeration cycle apparatus

Publications (2)

Publication Number Publication Date
JP2011021837A true JP2011021837A (en) 2011-02-03
JP5481981B2 JP5481981B2 (en) 2014-04-23

Family

ID=43632069

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009168140A Active JP5481981B2 (en) 2009-07-16 2009-07-16 Refrigeration cycle apparatus and control method of refrigeration cycle apparatus

Country Status (1)

Country Link
JP (1) JP5481981B2 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015075272A (en) * 2013-10-09 2015-04-20 株式会社富士通ゼネラル Air conditioner
JP2015206517A (en) * 2014-04-18 2015-11-19 ダイキン工業株式会社 Refrigeration device
CN105180498A (en) * 2015-09-02 2015-12-23 广东美的制冷设备有限公司 Floor-type split air conditioner, refrigerant recovering method and device
WO2016157519A1 (en) * 2015-04-03 2016-10-06 三菱電機株式会社 Air-conditioning device
WO2016203507A1 (en) * 2015-06-15 2016-12-22 三菱電機株式会社 Refrigeration cycle device
WO2017191814A1 (en) * 2016-05-02 2017-11-09 東芝キヤリア株式会社 Refrigeration cycle device
WO2018181038A1 (en) * 2017-03-31 2018-10-04 ダイキン工業株式会社 Air conditioning device
CN110260420A (en) * 2019-06-04 2019-09-20 珠海格力电器股份有限公司 Air-conditioning and air conditioner coolant recycling and control method
CN111288565A (en) * 2016-10-28 2020-06-16 大金工业株式会社 Air conditioner

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04369370A (en) * 1991-06-14 1992-12-22 Hitachi Ltd Air conditioner
JPH05118720A (en) * 1991-10-30 1993-05-14 Hitachi Ltd Control of refrigerator
JPH06180166A (en) * 1992-12-09 1994-06-28 Toshiba Corp Air-conditioner
JP2000097527A (en) * 1998-09-21 2000-04-04 Mitsubishi Heavy Ind Ltd Air conditioner and its control method
JP2002061996A (en) * 2000-08-10 2002-02-28 Sanyo Electric Air Conditioning Co Ltd Air conditioner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04369370A (en) * 1991-06-14 1992-12-22 Hitachi Ltd Air conditioner
JPH05118720A (en) * 1991-10-30 1993-05-14 Hitachi Ltd Control of refrigerator
JPH06180166A (en) * 1992-12-09 1994-06-28 Toshiba Corp Air-conditioner
JP2000097527A (en) * 1998-09-21 2000-04-04 Mitsubishi Heavy Ind Ltd Air conditioner and its control method
JP2002061996A (en) * 2000-08-10 2002-02-28 Sanyo Electric Air Conditioning Co Ltd Air conditioner

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015075272A (en) * 2013-10-09 2015-04-20 株式会社富士通ゼネラル Air conditioner
JP2015206517A (en) * 2014-04-18 2015-11-19 ダイキン工業株式会社 Refrigeration device
WO2016157519A1 (en) * 2015-04-03 2016-10-06 三菱電機株式会社 Air-conditioning device
JPWO2016157519A1 (en) * 2015-04-03 2017-11-02 三菱電機株式会社 Air conditioner
WO2016203507A1 (en) * 2015-06-15 2016-12-22 三菱電機株式会社 Refrigeration cycle device
CN105180498A (en) * 2015-09-02 2015-12-23 广东美的制冷设备有限公司 Floor-type split air conditioner, refrigerant recovering method and device
WO2017191814A1 (en) * 2016-05-02 2017-11-09 東芝キヤリア株式会社 Refrigeration cycle device
GB2565463A (en) * 2016-05-02 2019-02-13 Toshiba Carrier Corp Refrigeration cycle device
GB2565463B (en) * 2016-05-02 2021-03-03 Toshiba Carrier Corp Refrigeration cycle apparatus
CN111288565A (en) * 2016-10-28 2020-06-16 大金工业株式会社 Air conditioner
WO2018181038A1 (en) * 2017-03-31 2018-10-04 ダイキン工業株式会社 Air conditioning device
CN110260420A (en) * 2019-06-04 2019-09-20 珠海格力电器股份有限公司 Air-conditioning and air conditioner coolant recycling and control method

Also Published As

Publication number Publication date
JP5481981B2 (en) 2014-04-23

Similar Documents

Publication Publication Date Title
US9890974B2 (en) Air-conditioning apparatus
JP5236009B2 (en) Air conditioner
EP3315880B1 (en) Air conditioning system
JP5818900B2 (en) Heat pump equipment
JP5430667B2 (en) Heat pump equipment
JP6081033B1 (en) Air conditioner
JP5871959B2 (en) Air conditioner
JP5446064B2 (en) Heat exchange system
WO2016051606A1 (en) Air conditioning device
US9068766B2 (en) Air-conditioning and hot water supply combination system
CN104350338B (en) Aircondition
JP6005255B2 (en) Air conditioner
US10168068B2 (en) Air-conditioning apparatus
JP2017142039A (en) Air conditioner
JP3162132B2 (en) Refrigeration device control method
JP2009243793A (en) Heat pump type hot water supply outdoor unit
US8567203B2 (en) Air conditioner and defrosting operation method of the same
TW548389B (en) Freezing device
JP5395479B2 (en) Air conditioning system
WO2013099047A1 (en) Air conditioner
US8943847B2 (en) Air conditioning apparatus
US20110185754A1 (en) Air-conditioning apparatus
JP5447499B2 (en) Refrigeration equipment
US10145595B2 (en) Refrigeration cycle apparatus
KR20040066028A (en) Refrigerator

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20111014

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20130219

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20130416

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20131105

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20131220

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: 20140121

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20140203

R151 Written notification of patent or utility model registration

Ref document number: 5481981

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250