JP3242217B2 - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP3242217B2 JP3242217B2 JP17043893A JP17043893A JP3242217B2 JP 3242217 B2 JP3242217 B2 JP 3242217B2 JP 17043893 A JP17043893 A JP 17043893A JP 17043893 A JP17043893 A JP 17043893A JP 3242217 B2 JP3242217 B2 JP 3242217B2
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- valve
- heat exchanger
- refrigerant heater
- refrigerant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、冷媒加熱器を備えた空
気調和機に係わり、特に、暖房運転から冷房運転への切
換え時における異常音抑制構造の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner provided with a refrigerant heater, and more particularly to an improvement in an abnormal sound suppressing structure when switching from a heating operation to a cooling operation.
【０００２】[0002]
【従来の技術】冷凍サイクルを用いた空気調和機におい
ては、インバータ制御技術の開発などにより、ヒートポ
ンプエアコンとしての性能向上が顕著である。しかしな
がら、性能向上は冷房能力に対して著しく、暖房能力に
ついては、さほどでもない。これは、暖房作用が外気温
に影響されるためであり、外気温が低くなるほど暖房能
力が低下する問題が解消されていない。2. Description of the Related Art In an air conditioner using a refrigeration cycle, the performance of a heat pump air conditioner has been remarkably improved due to the development of inverter control technology and the like. However, the performance improvement is significant for the cooling capacity and not so much for the heating capacity. This is because the heating effect is affected by the outside air temperature, and the problem that the heating capacity decreases as the outside air temperature becomes lower has not been solved.
【０００３】そこで、暖房能力が外気温に左右されず、
しかも通常のヒートポンプエアコンと同程度の省スペー
スと、容易な施工性および安全性を持つ冷媒加熱式の空
気調和機が注目されている。Therefore, the heating capacity is not affected by the outside temperature,
In addition, attention has been paid to a refrigerant-heated air conditioner having a space saving equivalent to that of a normal heat pump air conditioner, easy workability and safety.
【０００４】この種の空気調和機の冷凍サイクルは、圧
縮機、四方弁、室外熱交換器、逆止弁、冷媒加熱器、絞
り装置、室内熱交換器、圧縮機へと順次接続される冷房
用循環回路と、圧縮機、四方弁、室内熱交換器、絞り装
置、冷媒加熱器、バイパス管、圧縮機へと順次接続され
る暖房用循環回路を備えている。[0004] The refrigerating cycle of this type of air conditioner includes a compressor, a four-way valve, an outdoor heat exchanger, a check valve, a refrigerant heater, a throttle device, an indoor heat exchanger, and a cooling system sequentially connected to the compressor. And a heating circulation circuit sequentially connected to a compressor, a four-way valve, an indoor heat exchanger, a throttle device, a refrigerant heater, a bypass pipe, and a compressor.
【０００５】前記バイパス管は、逆止弁と冷媒加熱器と
の間から分岐し、圧縮機の吸込み側に接続されていて、
ここに開閉弁が介設される。この開閉弁は、暖房運転モ
ード時には開放し、冷房運転モード時には閉止するよう
制御される。[0005] The bypass pipe branches from between the check valve and the refrigerant heater, and is connected to the suction side of the compressor.
Here, an on-off valve is provided. The on-off valve is controlled to open in the heating operation mode and closed in the cooling operation mode.
【０００６】したがって、逆止弁と開閉弁の開閉設定と
の関係で、冷房運転モードでは、〜室外熱交換器−逆止
弁−冷媒加熱器〜 へと冷媒が導かれ、暖房運転モード
では、 〜冷媒加熱器−バイパス管−圧縮機へと導かれ
ることとなる。Therefore, in the cooling operation mode, the refrigerant is guided to the outdoor heat exchanger, the check valve, and the refrigerant heater in the relationship between the check valve and the setting of the on-off valve. ~ Refrigerant heater-bypass pipe-compressor.
【０００７】上記冷媒加熱器は、燃焼ガスが導通する加
熱器本体周面に沿って、熱交換パイプである冷媒管が設
けられる。この冷媒加熱器と対向して、ガスバーナや比
例制御弁などから構成される燃焼ユニットが配置され
る。[0007] The refrigerant heater is provided with a refrigerant pipe as a heat exchange pipe along a peripheral surface of the heater main body through which the combustion gas flows. A combustion unit including a gas burner, a proportional control valve, and the like is arranged to face the refrigerant heater.
【０００８】暖房運転時に、燃焼ユニットは制御回路か
らの信号にもとづいて、上記冷媒加熱器を燃焼制御をな
した状態で加熱する。したがって、ここでガス燃焼した
熱を冷媒に加えた状態で、その冷媒が室内熱交換器に熱
を運んで暖房作用を行う。During the heating operation, the combustion unit heats the refrigerant heater in a state where combustion control is performed, based on a signal from the control circuit. Therefore, in a state where the gas-burned heat is added to the refrigerant, the refrigerant carries heat to the indoor heat exchanger to perform a heating action.
【０００９】[0009]
【発明が解決しようとする課題】ところで、この種の空
気調和機では、特に、暖房運転モードから冷房運転モー
ドに切換えた際に、問題がある。すなわち、暖房運転モ
ードで冷媒加熱器は燃焼ユニットにより加熱され、高温
状態にある。圧縮機から室外熱交換器に導かれて凝縮液
化した冷媒は、室内熱交換器に導かれる以前に冷媒加熱
器に導通され、ここの余熱を吸収する。By the way, this type of air conditioner has a problem particularly when switching from the heating operation mode to the cooling operation mode. That is, in the heating operation mode, the refrigerant heater is heated by the combustion unit and is in a high temperature state. The refrigerant condensed and liquefied by being guided from the compressor to the outdoor heat exchanger is conducted to the refrigerant heater before being guided to the indoor heat exchanger, and absorbs residual heat there.
【００１０】冷媒は蒸発し、膨張した状態で冷媒加熱器
を導出され、高圧化する。加熱器と室外熱交換器との間
の逆止弁の前後では、高圧の状態で特に圧力差がなくな
り、弁内のストッパが踊り（異常振動）、異常音が発生
する。[0010] The refrigerant evaporates and is led out of the refrigerant heater in an expanded state to increase the pressure. Before and after the check valve between the heater and the outdoor heat exchanger, there is no particular pressure difference in a high pressure state, and the stopper in the valve dances (abnormal vibration) and generates abnormal noise.
【００１１】それに加えて、たとえば外気温が低下し、
その影響で室外熱交換器の凝縮圧力が低くなると、逆止
弁に弁を閉じる方向の圧力が生じて、ここを導通する冷
媒の流通状態が不安定となり、さらに異常音が発生す
る。In addition, for example, when the outside air temperature decreases,
When the condensing pressure of the outdoor heat exchanger decreases due to the influence, a pressure in the direction in which the check valve closes is generated in the check valve, and the circulation state of the refrigerant passing therethrough becomes unstable, and further, abnormal noise is generated.
【００１２】本発明は上記事情に着目してなされたもの
であり、その目的とするところは、冷媒加熱器を備えた
冷凍サイクルで、暖房運転から冷房運転に切換えた直後
の、冷媒の流通を円滑にして、異常音の発生を抑制し、
快適空調をなす空気調和機を提供するものである。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a refrigeration cycle having a refrigerant heater, in which the circulation of refrigerant immediately after switching from heating operation to cooling operation is performed. Smooth, suppress the occurrence of abnormal sounds,
It is intended to provide an air conditioner that provides comfortable air conditioning.
【００１３】[0013]
【課題を解決するための手段】上記目的を達成するため
に、第１の発明の空気調和機は、圧縮機、四方弁、室外
熱交換器、逆止弁、冷媒加熱器、絞り装置、室内熱交換
器を順次接続するとともに、前記逆止弁と冷媒加熱器と
の間から分岐し圧縮機の吸込み側配管に連通するバイパ
ス管と、このバイパス管に介設され暖房運転モード時に
は開放し、冷房運転モード時には閉止する開閉弁を備え
た冷凍サイクルを、前記四方弁の切換えにより、圧縮機
の吐出側から、四方弁、室外熱交換器、逆止弁、冷媒加
熱器、絞り装置、室内熱交換器、圧縮機の吸込み側へと
順次接続される冷房用循環回路と、前記圧縮機の吐出側
から、四方弁、室内熱交換器、絞り装置、冷媒加熱器、
バイパス管、圧縮機の吸込み側へと順次接続される暖房
用循環回路を構成し、前記冷媒加熱器の入口側または出
口側配管から分岐して圧縮機の吐出側配管に連通し、逆
止弁を介在させたバイパス回路を備えた。In order to achieve the above object, an air conditioner according to a first aspect of the present invention comprises a compressor, a four-way valve, an outdoor heat exchanger, a check valve, a refrigerant heater, a throttle device, and an indoor unit. While sequentially connecting the heat exchanger, a bypass pipe that branches from between the check valve and the refrigerant heater and communicates with the suction side pipe of the compressor, and is opened in the heating operation mode that is interposed in the bypass pipe, The refrigerating cycle having an on-off valve that closes in the cooling operation mode is switched from the discharge side of the compressor to the four-way valve, the outdoor heat exchanger, the check valve, the refrigerant heater, the throttle device, and the indoor heat by switching the four-way valve. Exchanger, a cooling circulation circuit sequentially connected to the suction side of the compressor, and from the discharge side of the compressor, a four-way valve, an indoor heat exchanger, a throttle device, a refrigerant heater,
A bypass pipe and a circulation circuit for heating are sequentially connected to a suction side of the compressor, and branch from an inlet side or an outlet side pipe of the refrigerant heater and communicate with a discharge side pipe of the compressor. And a bypass circuit interposed therebetween.
【００１４】第２の発明の空気調和機は、第１の発明に
おけるバイパス回路を、冷媒加熱器と絞り装置との間の
配管から分岐して、圧縮機の吐出側配管に連通し、逆止
弁を介在させた。In the air conditioner of the second invention, the bypass circuit of the first invention is branched from a pipe between the refrigerant heater and the expansion device, communicates with a discharge pipe of the compressor, and is checked. A valve was interposed.
【００１５】第３の発明の空気調和機は、圧縮機、四方
弁、室外熱交換器、逆止弁、冷媒加熱器、絞り装置、室
内熱交換器を順次接続するとともに、前記逆止弁と冷媒
加熱器との間から分岐し圧縮機の吸込み側配管に連通す
るバイパス管と、このバイパス管に介設され暖房運転モ
ード時には開放し、冷房運転モード時には閉止する開閉
弁を備えた冷凍サイクルを、前記四方弁の切換えによ
り、圧縮機の吐出側から、四方弁、室外熱交換器、逆止
弁、冷媒加熱器、絞り装置、室内熱交換器、圧縮機の吸
込み側へと順次接続される冷房用循環回路と、前記圧縮
機の吐出側から、四方弁、室内熱交換器、絞り装置、冷
媒加熱器、バイパス管、圧縮機の吸込み側へと順次接続
される暖房用循環回路を構成し、前記開閉弁を暖房運転
モード時に開放し、冷房運転モード時に閉止する制御手
段と、暖房運転モードから冷房運転モードに切換えの
際、冷房運転開始から所定時間、前記開閉弁を開放する
制御手段を備えた。An air conditioner according to a third aspect of the present invention includes a compressor, a four-way valve, an outdoor heat exchanger, a check valve, a refrigerant heater, a throttle device, and an indoor heat exchanger, which are sequentially connected. A refrigeration cycle including a bypass pipe branched from the refrigerant heater and communicating with a suction side pipe of the compressor, and an opening / closing valve interposed in the bypass pipe and opened in a heating operation mode and closed in a cooling operation mode. By switching the four-way valve, the compressor is sequentially connected from the discharge side to the four-way valve, an outdoor heat exchanger, a check valve, a refrigerant heater, a throttle device, an indoor heat exchanger, and a suction side of the compressor. A circulation circuit for cooling and a circulation circuit for heating sequentially connected from a discharge side of the compressor to a four-way valve, an indoor heat exchanger, a throttling device, a refrigerant heater, a bypass pipe, and a suction side of the compressor are configured. Opening the on-off valve in the heating operation mode, And control means for closing the bunch operation mode, when switching from the heating operation mode to the cooling operation mode, a predetermined time after the cooling operation starts, including a control means for opening said closing valve.
【００１６】[0016]
【作用】第１の発明では、暖房運転から冷房運転に切換
えた直後の逆止弁前後に発生する高圧の冷媒を、冷媒加
熱器の入口側または出口側配管から分岐したバイパス回
路を介して圧縮機の吐出側配管に逃がし、圧力を低下さ
せて、冷媒流通を円滑化し、逆止弁の異常音発生を抑制
する。上記バイパス回路には、逆止弁が設けられてい
て、圧縮機から直接冷媒加熱器側へ冷媒が導かれること
はない。According to the first aspect of the invention, the high-pressure refrigerant generated around the check valve immediately after switching from the heating operation to the cooling operation is compressed via the bypass circuit branched from the inlet or outlet pipe of the refrigerant heater. Escape to the discharge pipe of the machine, reduce the pressure, smooth the refrigerant flow, and suppress the generation of abnormal noise of the check valve. The bypass circuit is provided with a check valve, and refrigerant is not directly guided from the compressor to the refrigerant heater side.
【００１７】第２の発明では、暖房運転から冷房運転に
切換えた直後の逆止弁前後に発生する高圧の冷媒を、冷
媒加熱器と絞り装置との間の配管から分岐したバイパス
回路を介して圧縮機の吐出側配管に逃がし、圧力を低下
させて、冷媒流通を円滑化し、逆止弁の異常音発生を抑
制する。上記バイパス回路には、逆止弁が設けられてい
て、圧縮機から直接冷媒加熱器側へ冷媒が導かれること
はない。In the second invention, high-pressure refrigerant generated before and after the check valve immediately after switching from the heating operation to the cooling operation is passed through a bypass circuit branched from a pipe between the refrigerant heater and the expansion device. It escapes to the discharge side pipe of the compressor, reduces the pressure, smoothes the flow of the refrigerant, and suppresses the occurrence of abnormal noise of the check valve. The bypass circuit is provided with a check valve, and refrigerant is not directly guided from the compressor to the refrigerant heater side.
【００１８】第３の発明では、逆止弁と冷媒加熱器との
間から分岐して、圧縮機の吸込み側配管に連通するバイ
パス管に介設される開閉弁を、暖房運転モード時に開放
し、冷房運転モード時に閉止し、かつ暖房運転モードか
ら冷房運転モードに切換えの際、冷房運転開始から所定
時間、開閉弁を開放する。In the third invention, the on-off valve branched from the check valve and the refrigerant heater and interposed in the bypass pipe communicating with the suction pipe of the compressor is opened in the heating operation mode. When the air conditioner is closed in the cooling operation mode, and when switching from the heating operation mode to the cooling operation mode, the on-off valve is opened for a predetermined time from the start of the cooling operation.
【００１９】このことにより、逆止弁と、二方弁および
冷媒加熱器の冷媒は圧縮機に戻され、これらの間の冷媒
圧力が低下する。すなわち、逆止弁にかかる逆圧が低下
して、室外熱交換器から出た冷媒は冷媒加熱器に円滑に
流れ、逆止弁から異常音が発生しない。As a result, the refrigerant in the check valve, the two-way valve and the refrigerant heater is returned to the compressor, and the pressure of the refrigerant between them decreases. That is, the back pressure applied to the check valve decreases, and the refrigerant flowing out of the outdoor heat exchanger flows smoothly to the refrigerant heater, and no abnormal sound is generated from the check valve.
【００２０】[0020]
【実施例】以下、本発明の一実施例を図面にもとづいて
説明する。図１は、空気調和機の冷凍サイクル回路を示
す。図中１は圧縮機であり、この圧縮機１の吐出側に
は、四方弁２、室外熱交換器３、逆止弁４、冷媒加熱器
５、絞り装置である電子膨張弁６、接続用弁７を介して
室内熱交換器８が順次、冷媒管Ｐを介して接続される。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a refrigeration cycle circuit of the air conditioner. In the drawing, reference numeral 1 denotes a compressor. On the discharge side of the compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a check valve 4, a refrigerant heater 5, an electronic expansion valve 6 as a throttle device, and a connection device The indoor heat exchangers 8 are sequentially connected via the refrigerant pipe P via the valve 7.
【００２１】上記逆止弁４は、室外熱交換器３から冷媒
加熱器５側へ冷媒を流通させ、反方向への流れを阻止す
る。上記室内熱交換器８は、再熱器８ａと冷却器８ｂと
が相対向して配置され、これらの間には補助電子膨張弁
９が介設される。The check valve 4 allows the refrigerant to flow from the outdoor heat exchanger 3 to the refrigerant heater 5 and prevents the refrigerant from flowing in the opposite direction. In the indoor heat exchanger 8, a reheater 8a and a cooler 8b are arranged to face each other, and an auxiliary electronic expansion valve 9 is interposed between them.
【００２２】さらに、室内熱交換器８の冷却器８ｂか
ら、接続弁１０、四方弁２、逆止弁１１から圧縮機１の
吸込み側に冷媒管Ｐを介して接続される。上記逆止弁１
１は、四方弁２から圧縮機１側へ冷媒を流通させ、反方
向への流れを阻止するよう設けられる。Further, from the cooler 8b of the indoor heat exchanger 8, the connection valve 10, the four-way valve 2, and the check valve 11 are connected through the refrigerant pipe P to the suction side of the compressor 1. Check valve 1
Numeral 1 is provided so as to allow the refrigerant to flow from the four-way valve 2 to the compressor 1 and to prevent the flow in the opposite direction.
【００２３】上記各接続弁７，１０は、室外側と室内側
との配管接続用であって、据付完了後に作業員によって
開放操作される。また、上記逆止弁４と冷媒加熱器５と
の間に一端が、かつ逆止弁１１と圧縮機１吸込み側との
間に他端が接続される第１のバイパス管１２が設けられ
ていて、ここには開閉弁１３が介設される。Each of the connection valves 7 and 10 is for connecting a pipe between the outside and the inside of the room, and is opened by an operator after the installation is completed. Further, a first bypass pipe 12 is provided, one end of which is connected between the check valve 4 and the refrigerant heater 5 and the other end of which is connected between the check valve 11 and the suction side of the compressor 1. Here, an on-off valve 13 is interposed.
【００２４】さらに、冷媒加熱器５と電子膨張弁６との
間に一端が、かつ圧縮機１吐出側と四方弁２との間に他
端が接続される第２のバイパス管１４が設けられてい
て、ここには一端から他端側へ冷媒を流通させ、反方向
は閉止する逆止弁１５が介設される。これら第２のバイ
パス管１４と逆止弁１５とで、バイパス回路１４Ａが構
成される。Further, a second bypass pipe 14 having one end connected between the refrigerant heater 5 and the electronic expansion valve 6 and the other end connected between the compressor 1 discharge side and the four-way valve 2 is provided. Here, a check valve 15 that allows the refrigerant to flow from one end to the other end and closes in the opposite direction is provided. The second bypass pipe 14 and the check valve 15 constitute a bypass circuit 14A.
【００２５】上記接続弁１０と四方弁２との間に一端
が、かつ第２のバイパス管１４の一端接続部と電子膨張
弁６との間に他端部が接続される第３のバイパス管１６
が設けられていて、ここには一端から他端側へ冷媒を流
通させる逆止弁１７と補助キャピラリーチューブ１８が
直列に介設される。A third bypass pipe having one end connected between the connection valve 10 and the four-way valve 2 and the other end connected between the one-end connection portion of the second bypass pipe 14 and the electronic expansion valve 6. 16
A check valve 17 for flowing the refrigerant from one end to the other end and an auxiliary capillary tube 18 are interposed in series.
【００２６】上記冷媒加熱器５には、ガスバーナ１９を
備え、このガスバーナが比例制御弁２０を介してガス供
給源に連通する燃焼ユニット２１が対向して配置され
る。このような冷凍サイクルには、圧縮機１の吐出側か
ら、四方弁２、室外熱交換器３、逆止弁４、冷媒加熱器
５、電子膨張弁６、室内熱交換器８の再熱器８ａ、補助
電子膨張弁９、冷却器８ｂ、四方弁２、逆止弁１１、圧
縮機１の吸込み側へと順次接続される冷房用循環回路Ｃ
が構成される。The refrigerant heater 5 has a gas burner 19, and a combustion unit 21, which communicates with the gas supply via a proportional control valve 20, is disposed facing the gas burner 19. In such a refrigeration cycle, a four-way valve 2, an outdoor heat exchanger 3, a check valve 4, a refrigerant heater 5, an electronic expansion valve 6, and a reheater of an indoor heat exchanger 8 are provided from the discharge side of the compressor 1. 8a, an auxiliary electronic expansion valve 9, a cooler 8b, a four-way valve 2, a check valve 11, and a cooling circulation circuit C sequentially connected to the suction side of the compressor 1.
Is configured.
【００２７】また、圧縮機１の吐出側から、四方弁２、
室内熱交換器８の冷却器８ｂ、補助電子膨張弁９、再熱
器８ａ、電子膨張弁６、冷媒加熱器５、第１のバイパス
管１２の開閉弁１３、圧縮機１の吸込み側を順次接続さ
れる暖房用循環回路Ｈが構成される。From the discharge side of the compressor 1, a four-way valve 2,
The cooler 8b of the indoor heat exchanger 8, the auxiliary electronic expansion valve 9, the reheater 8a, the electronic expansion valve 6, the refrigerant heater 5, the open / close valve 13 of the first bypass pipe 12, and the suction side of the compressor 1 are sequentially arranged. A connected heating circulation circuit H is configured.
【００２８】冷凍サイクル構成は以上述べた通りである
が、上記室外熱交換器３と室内熱交換器８にそれぞれ対
向して、ここでは図示しない室外送風機と、室内送風機
が配設される。The configuration of the refrigeration cycle is as described above. An outdoor blower (not shown) and an indoor blower (not shown) are provided opposite to the outdoor heat exchanger 3 and the indoor heat exchanger 8, respectively.
【００２９】先に説明した、圧縮機１、四方弁２、電子
膨張弁６、補助電子膨張弁９、開閉弁１３、燃焼ユニッ
ト２１の比例制御弁２０および、先に説明した室内送風
機と室外送風機は、全て制御回路２２に電気的に接続さ
れ、この制御回路に検知信号を送り、もしくは制御回路
から制御信号を受けるようになっている。The compressor 1, the four-way valve 2, the electronic expansion valve 6, the auxiliary electronic expansion valve 9, the on-off valve 13, the proportional control valve 20 of the combustion unit 21, the indoor blower and the outdoor blower described above Are electrically connected to the control circuit 22 to send a detection signal to the control circuit or receive a control signal from the control circuit.
【００３０】制御回路２２は、マイクロコンピュータお
よびその周辺回路から構成されていて、次の機能手段を
備える。 （１） 圧縮機１の運転オン、四方弁２の非切換え、燃
焼ユニット２１の運転オフを設定し、かつ二方弁１３を
閉成して、圧縮機から吐出される冷媒を四方弁２、室外
熱交換器３、逆止弁４、冷媒加熱器５、電子膨張弁６、
室内熱交換器８の再熱器８ａ、補助電子膨張弁９、冷却
器８ｂ、四方弁２、逆止弁１１、圧縮機１の吸込み側へ
と、順次導き、冷房用循環回路Ｃを循環させる、冷房運
転を実行する手段。The control circuit 22 is composed of a microcomputer and its peripheral circuits, and has the following functional means. (1) The operation of the compressor 1 is turned on, the four-way valve 2 is not switched, the operation of the combustion unit 21 is turned off, and the two-way valve 13 is closed. Outdoor heat exchanger 3, check valve 4, refrigerant heater 5, electronic expansion valve 6,
The reheater 8a of the indoor heat exchanger 8, the auxiliary electronic expansion valve 9, the cooler 8b, the four-way valve 2, the check valve 11, and the suction side of the compressor 1 are sequentially guided to circulate the cooling circuit C. Means for performing a cooling operation.
【００３１】（２） 圧縮機１の運転オン、四方弁２の
切換え、燃焼ユニット２１の運転オン（ガスバーナ１９
の燃焼作用）を設定し、かつ開閉弁１３を開放して、圧
縮機１から吐出される冷媒を、四方弁２、室内熱交換器
８の冷却器８ｂ、補助電子膨張弁９、再熱器８ａ、電子
膨張弁６、冷媒加熱器５、第１のバイパス管１２の開閉
弁１３、圧縮機１の吸込み側を順次導き、暖房用循環回
路Ｈを循環させる暖房運転を実行する手段。(2) The compressor 1 is turned on, the four-way valve 2 is switched, and the combustion unit 21 is turned on (gas burner 19
), And the on-off valve 13 is opened to allow the refrigerant discharged from the compressor 1 to flow through the four-way valve 2, the cooler 8 b of the indoor heat exchanger 8, the auxiliary electronic expansion valve 9, the reheater 8a, means for executing a heating operation in which the electronic expansion valve 6, the refrigerant heater 5, the on-off valve 13 of the first bypass pipe 12, and the suction side of the compressor 1 are sequentially guided to circulate the heating circulation circuit H.
【００３２】つぎに、上記構成における作用について説
明する。冷房運転モードが設定されると、開閉弁１３は
閉成し、燃焼ユニット２１は停止状態で圧縮機１が駆動
され、冷媒は図に実線矢印に示すように、冷房用循環回
路Ｃを循環する。Next, the operation of the above configuration will be described. When the cooling operation mode is set, the on-off valve 13 is closed, the compressor 1 is driven with the combustion unit 21 stopped, and the refrigerant circulates in the cooling circuit C as shown by the solid arrow in the figure. .
【００３３】冷媒は室内熱交換器５で蒸発し、ここに導
かれる被空調室空気は蒸発潜熱を奪われて低温化する。
そのまま吹出されて、被空調室の冷房作用をなす。暖房
運転モードが設定されると、四方弁２が暖房運転用に切
換えられるとともに、開閉弁１３は開放される。同時
に、燃焼ユニット２１が燃焼を開始して、冷媒加熱器５
が加熱される。The refrigerant evaporates in the indoor heat exchanger 5, and the air to be air-conditioned in the room is deprived of latent heat of evaporation and cooled.
The air is blown out as it is to cool the room to be conditioned. When the heating operation mode is set, the four-way valve 2 is switched to the heating operation, and the on-off valve 13 is opened. At the same time, the combustion unit 21 starts burning, and the refrigerant heater 5
Is heated.
【００３４】室内熱交換器８で冷媒は凝縮熱を放出し、
被空調室内の暖房作用をなしてから、冷媒加熱器５で加
熱されて圧縮機１に導かれる。このとき冷媒加熱器５で
得られた熱が冷媒に加えられ、その冷媒が室内熱交換器
８に熱を運んで、極めて効果的な暖房作用が行われる。In the indoor heat exchanger 8, the refrigerant releases heat of condensation,
After performing the heating function of the room to be air-conditioned, it is heated by the refrigerant heater 5 and guided to the compressor 1. At this time, the heat obtained by the refrigerant heater 5 is added to the refrigerant, and the refrigerant carries heat to the indoor heat exchanger 8, so that an extremely effective heating operation is performed.
【００３５】特に、暖房運転時に、圧縮機１から吐出さ
れる冷媒の一部が第３のバイパス管１６を通って冷媒加
熱器５側に導かれるが、その冷媒の量は補助キャピラリ
ーチューブ１８の抵抗によって極く少量に抑えられ、運
転に支障はきたさない。In particular, during the heating operation, a part of the refrigerant discharged from the compressor 1 is guided to the refrigerant heater 5 through the third bypass pipe 16, and the amount of the refrigerant is controlled by the auxiliary capillary tube 18. It is kept to a very small amount by the resistance and does not hinder driving.
【００３６】なお、暖房運転を停止して、その直後、あ
まり時間が経過していない状態で冷房運転への切換えを
設定する場合がある。すなわち、暖房運転時には燃焼ユ
ニット２１が冷媒加熱器５に対する加熱作用をなし、こ
の加熱器は余熱をもっていて、比較的高温となってい
る。In some cases, the heating operation is stopped, and immediately after that, the switching to the cooling operation is set in a state where much time has not passed. That is, during the heating operation, the combustion unit 21 performs a heating action on the refrigerant heater 5, and this heater has residual heat and is relatively high in temperature.
【００３７】それにも係わらず、運転モードの切換えに
よって、圧縮機１から室外熱交換器３に導かれて凝縮液
化した冷媒は、室内熱交換器８に導かれる以前に、冷媒
加熱器５を導通して、ここの余熱を吸収する。Nevertheless, by switching the operation mode, the refrigerant condensed and liquefied from the compressor 1 to the outdoor heat exchanger 3 passes through the refrigerant heater 5 before being guided to the indoor heat exchanger 8. Then, absorb the residual heat here.
【００３８】冷媒は蒸発し、膨張した状態で冷媒加熱器
５を導出される。すなわち、高圧化するが、この導出側
に設けられる第２のバイパス管１４から、逆止弁１５を
介して圧縮機１の吐出側に、自然的に逃がされる。The refrigerant evaporates and is discharged from the refrigerant heater 5 in an expanded state. That is, the pressure is increased, but is naturally released from the second bypass pipe 14 provided on the outlet side to the discharge side of the compressor 1 via the check valve 15.
【００３９】したがって、冷媒加熱器５と室外熱交換器
３との間の逆止弁４の前後で圧力差が生じ、冷媒が円滑
に導かれる。従来のような、逆止弁４での異常音発生が
なく、快適空調が行われる。Accordingly, a pressure difference is generated between the refrigerant heater 5 and the outdoor heat exchanger 3 before and after the check valve 4, and the refrigerant is guided smoothly. There is no occurrence of abnormal noise in the check valve 4 as in the related art, and comfortable air conditioning is performed.
【００４０】ある程度の時間が経過すれば、冷媒加熱器
５が冷却され、液冷媒がそのまま電子膨張弁６に導かれ
る通常の冷房サイクルとなり、上記第１のバイパス管１
４から圧縮機１吐出側への冷媒の逃げがなくなる。After a certain period of time has passed, the refrigerant heater 5 is cooled, and a normal cooling cycle in which the liquid refrigerant is guided to the electronic expansion valve 6 as it is is performed.
4 does not escape from the compressor 1 to the discharge side of the compressor 1.
【００４１】なお、冷媒加熱器５に液状の冷媒が集溜し
た状態で、暖房運転を開始し、燃焼ユニット２１の燃焼
をなすと、冷媒が極く短時間で加熱され、蒸発して、加
熱器の圧力が早急に上昇する。When the heating operation is started in a state where the liquid refrigerant is collected in the refrigerant heater 5, and the combustion unit 21 burns, the refrigerant is heated in a very short time, evaporates, and is heated. The vessel pressure rises quickly.
【００４２】このようなときにも、第２のバイパス管１
４から逆止弁１５を介して高圧の冷媒ガスが圧縮機１の
吐出側に逃げるので、冷媒加熱器５内の圧力降下に効果
がある。すなわち、冷媒加熱器５の液封防止作用をな
す。Also in such a case, the second bypass pipe 1
Since the high-pressure refrigerant gas escapes from the compressor 4 to the discharge side of the compressor 1 via the check valve 15, it is effective in reducing the pressure in the refrigerant heater 5. That is, the liquid heater 5 functions to prevent liquid sealing.
【００４３】なお、上記実施例においては、第２のバイ
パス管１４の一端を、冷媒加熱器５の上流側である電子
膨張弁６との間に接続したが、これに限定されるもので
はなく、この一端を冷媒加熱器の下流側に接続するよう
にしても、上記実施例と同様の作用効果を奏する。In the above embodiment, one end of the second bypass pipe 14 is connected to the electronic expansion valve 6 upstream of the refrigerant heater 5, but the present invention is not limited to this. Even if this one end is connected to the downstream side of the refrigerant heater, the same operation and effect as those of the above embodiment can be obtained.
【００４４】さらに、図２に示すような冷凍サイクルを
構成し、制御をなしてもよい。先に説明した、第１の実
施例と同一部品に同番号を付して、新たな説明を省略す
る。なお、この実施例においては、特に、先に説明した
第２のバイパス管１４が不要である。（第３のバイパス
管１６は、備えてあっても支障がない）制御回路２２Ａ
は、先に説明した、冷媒を冷房用循環回路Ｃに沿って循
環させて冷房運転を実行する手段と、冷媒を暖房用循環
回路Ｈに沿って循環させて暖房運転を実行する手段の他
に、暖房運転から冷房運転に切換えた際、図３に示すよ
うに、冷房運転開始から所定時間Ｔ1 は、第１のバイパ
ス管１２の開閉弁１３を継続して開放し、しかる後閉成
する手段を備える。Further, a refrigeration cycle as shown in FIG. 2 may be configured and controlled. The same components as those of the first embodiment described above are denoted by the same reference numerals, and a new description will be omitted. Note that, in this embodiment, the second bypass pipe 14 described above is not particularly necessary. (There is no problem even if the third bypass pipe 16 is provided.) Control circuit 22A
Means for performing the cooling operation by circulating the refrigerant along the cooling circuit C, and means for performing the heating operation by circulating the refrigerant along the heating circuit H described above. when switched to the cooling operation from the heating operation, as shown in FIG. 3, the predetermined time T 1 from the cooling operation start to open to continue the on-off valve 13 of the first bypass pipe 12 is thereafter closed Means.
【００４５】なお、上記所定時間Ｔ1 は、冷媒加熱器５
の温度（余熱度）や、外気温度等の条件によって設定さ
れる。しかして、暖房運転から冷房運転に切換えた直後
は、冷媒が冷媒加熱器５の余熱を吸収して蒸発し、膨張
するが、暖房運転時と同様、開閉弁１３が開放制御され
るので、逆止弁４、開閉弁１３および冷媒加熱器５間か
ら圧縮機１吸込み側へ戻される。The above-mentioned predetermined time T 1 is equal to the length of the refrigerant heater 5.
Is set depending on conditions such as the temperature (degree of residual heat) and the outside air temperature. Thus, immediately after switching from the heating operation to the cooling operation, the refrigerant absorbs the residual heat of the refrigerant heater 5, evaporates, and expands. However, as in the heating operation, the on-off valve 13 is controlled to be open. It is returned to the compressor 1 suction side from between the stop valve 4, the on-off valve 13 and the refrigerant heater 5.
【００４６】したがって、所定時間Ｔ1 の間に逆止弁４
への逆圧が低下する。この時間中に冷媒加熱器５は温度
低下し、時間経過後に開閉弁１３を閉止して、通常の冷
房運転状態に戻れば、室外熱交換器３から導出される冷
媒が逆止弁４を介して円滑に冷媒加熱器５へ導かれる。
上記実施例と同様、逆止弁４からは全く異常音の発生が
みられない。Therefore, during the predetermined time T 1 , the check valve 4
The back pressure to is reduced. During this time, the temperature of the refrigerant heater 5 decreases, and after a lapse of time, the on-off valve 13 is closed to return to the normal cooling operation state, so that the refrigerant discharged from the outdoor heat exchanger 3 passes through the check valve 4. To the refrigerant heater 5 smoothly.
As in the above embodiment, no abnormal noise is generated from the check valve 4 at all.
【００４７】[0047]
【発明の効果】以上説明したように第１の発明は、冷媒
加熱器の入口側または出口側配管から分岐して圧縮機の
吐出側配管に連通され、逆止弁を介在させたバイパス回
路を備えたから、第２の発明は、冷媒加熱器と絞り装置
との間の配管から分岐して圧縮機の吐出側配管に連通さ
れ、逆止弁を介在させたバイパス回路を備えたから、第
３の発明は、開閉弁を暖房運転モード時に開放し、冷房
運転モード時に閉止する制御手段と、暖房運転モードか
ら冷房運転モードに切換えの際、冷房運転開始から所定
時間、前記開閉弁を開放する制御手段を備えたから、冷
媒加熱器を備えた冷凍サイクルで、暖房運転から冷房運
転に切換えた直後における冷媒の円滑な流通化を図り、
異常音の発生を抑制して、快適空調をなす効果を奏す
る。As described above, the first aspect of the present invention provides a bypass circuit which branches off from the inlet or outlet pipe of a refrigerant heater and communicates with the discharge pipe of a compressor, and has a check valve interposed. Therefore, the second invention is provided with a bypass circuit which branches off from a pipe between the refrigerant heater and the expansion device, is connected to the discharge pipe of the compressor, and has a check valve interposed therebetween. The invention provides control means for opening an on-off valve in a heating operation mode and closing it in a cooling operation mode, and control means for opening the on-off valve for a predetermined time from the start of cooling operation when switching from the heating operation mode to the cooling operation mode. Because, with a refrigeration cycle equipped with a refrigerant heater, the smooth circulation of the refrigerant immediately after switching from heating operation to cooling operation,
The effect of suppressing the occurrence of abnormal noise and providing comfortable air conditioning is achieved.
【図１】本発明の一実施例を示す、空気調和機の冷凍サ
イクル構成および制御回路構成図。FIG. 1 is a configuration diagram of a refrigeration cycle and a control circuit of an air conditioner, showing an embodiment of the present invention.
【図２】他の実施例を示す、空気調和機の冷凍サイクル
構成および制御回路構成図。FIG. 2 is a configuration diagram of a refrigeration cycle and a control circuit of an air conditioner, showing another embodiment.
【図３】同実施例の、制御タイムチャート図。FIG. 3 is a control time chart of the embodiment.
１…圧縮機、２…四方弁、３…室外熱交換器、４…逆止
弁、５…冷媒加熱器、６…絞り装置（電子膨張弁）、８
…室内熱交換器、１２…（第１の）バイパス管、１３…
開閉弁、Ｃ…冷房用循環回路、Ｈ…暖房用循環回路、１
４Ａ…バイパス回路、１５…逆止弁。DESCRIPTION OF SYMBOLS 1 ... Compressor, 2 ... 4-way valve, 3 ... Outdoor heat exchanger, 4 ... Check valve, 5 ... Refrigerant heater, 6 ... Throttle device (electronic expansion valve), 8
... indoor heat exchanger, 12 ... (first) bypass pipe, 13 ...
On-off valve, C: cooling circuit, H: heating circuit, 1
4A: bypass circuit, 15: check valve.
フロントページの続き (72)発明者 佐藤 武 静岡県富士市蓼原336番地 株式会社東 芝富士工場内 (56)参考文献 特開 平５−18630（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F25B 13/00 341 Continuation of the front page (72) Inventor Takeshi Sato 336 Tatehara, Fuji-shi, Shizuoka Prefecture Inside the Toshiba Fuji Plant Co., Ltd. (56) References JP-A-5-18630 (JP, A) (58) Fields surveyed Cl. 7 , DB name) F25B 13/00 341
Claims (3)
冷媒加熱器、絞り装置、室内熱交換器を順次接続すると
ともに、前記逆止弁と冷媒加熱器との間から分岐し圧縮
機の吸込み側配管に連通するバイパス管と、このバイパ
ス管に介設され暖房運転モード時には開放し、冷房運転
モード時には閉止する開閉弁を備えた冷凍サイクルを、
前記四方弁の切換えにより、圧縮機の吐出側から、四方
弁、室外熱交換器、逆止弁、冷媒加熱器、絞り装置、室
内熱交換器、圧縮機の吸込み側へと順次接続される冷房
用循環回路と、前記圧縮機の吐出側から、四方弁、室内
熱交換器、絞り装置、冷媒加熱器、バイパス管、圧縮機
の吸込み側へと順次接続される暖房用循環回路を構成さ
せた空気調和機において、 前記冷媒加熱器の入口側または出口側配管から分岐して
前記圧縮機の吐出側配管に連通され、逆止弁を介在させ
たバイパス回路を備えたことを特徴とする空気調和機。1. A compressor, a four-way valve, an outdoor heat exchanger, a check valve,
A refrigerant heater, a throttling device, and an indoor heat exchanger are sequentially connected, and a bypass pipe that branches from between the check valve and the refrigerant heater and communicates with a suction-side pipe of the compressor, and is provided in the bypass pipe. A refrigeration cycle with an on-off valve that opens during heating operation mode and closes during cooling operation mode,
By switching the four-way valve, cooling is sequentially connected from the discharge side of the compressor to a four-way valve, an outdoor heat exchanger, a check valve, a refrigerant heater, a throttle device, an indoor heat exchanger, and a suction side of the compressor. A circulation circuit for heating and a circulation circuit for heating sequentially connected from the discharge side of the compressor to a four-way valve, an indoor heat exchanger, a throttle device, a refrigerant heater, a bypass pipe, and a suction side of the compressor. An air conditioner, comprising: a bypass circuit branched from an inlet side or an outlet side pipe of the refrigerant heater, communicated with a discharge side pipe of the compressor, and provided with a check valve interposed therebetween. Machine.
置との間の配管から分岐して前記圧縮機の吐出側配管に
連通され、逆止弁を介在させたことを特徴とする請求項
１記載の空気調和機。2. The apparatus according to claim 1, wherein the bypass circuit branches off from a pipe between the refrigerant heater and the expansion device, communicates with a discharge pipe of the compressor, and interposes a check valve. 2. The air conditioner according to 1.
冷媒加熱器、絞り装置、室内熱交換器を順次接続すると
ともに、前記逆止弁と冷媒加熱器との間から分岐し圧縮
機の吸込み側配管に連通するバイパス管と、このバイパ
ス管に介設され暖房運転モード時には開放し、冷房運転
モード時には閉止する開閉弁を備えた冷凍サイクルを、
前記四方弁の切換えにより、圧縮機の吐出側から、四方
弁、室外熱交換器、逆止弁、冷媒加熱器、絞り装置、室
内熱交換器、圧縮機の吸込み側へと順次接続される冷房
用循環回路と、前記圧縮機の吐出側から、四方弁、室内
熱交換器、絞り装置、冷媒加熱器、バイパス管、圧縮機
の吸込み側へと順次接続される暖房用循環回路を構成さ
せた空気調和機において、 前記開閉弁を暖房運転モード時に開放し、冷房運転モー
ド時に閉止する制御手段と、暖房運転モードから冷房運
転モードに切換えの際、冷房運転開始から所定時間、前
記開閉弁を開放する制御手段を備えたことを特徴とする
空気調和機。3. A compressor, a four-way valve, an outdoor heat exchanger, a check valve,
A refrigerant heater, a throttling device, and an indoor heat exchanger are sequentially connected, and a bypass pipe that branches from between the check valve and the refrigerant heater and communicates with a suction-side pipe of the compressor, and is provided in the bypass pipe. A refrigeration cycle with an on-off valve that opens during heating operation mode and closes during cooling operation mode,
By switching the four-way valve, cooling is sequentially connected from the discharge side of the compressor to a four-way valve, an outdoor heat exchanger, a check valve, a refrigerant heater, a throttle device, an indoor heat exchanger, and a suction side of the compressor. A circulation circuit for heating and a circulation circuit for heating sequentially connected from the discharge side of the compressor to a four-way valve, an indoor heat exchanger, a throttle device, a refrigerant heater, a bypass pipe, and a suction side of the compressor. In the air conditioner, control means for opening the on-off valve in the heating operation mode and closing it in the cooling operation mode, and when switching from the heating operation mode to the cooling operation mode, opening the on-off valve for a predetermined time from the start of the cooling operation An air conditioner, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17043893A JP3242217B2 (en) | 1993-07-09 | 1993-07-09 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17043893A JP3242217B2 (en) | 1993-07-09 | 1993-07-09 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0727437A JPH0727437A (en) | 1995-01-27 |
| JP3242217B2 true JP3242217B2 (en) | 2001-12-25 |
Family
ID=15904924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17043893A Expired - Fee Related JP3242217B2 (en) | 1993-07-09 | 1993-07-09 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3242217B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4605161B2 (en) * | 2007-01-12 | 2011-01-05 | パナソニック株式会社 | Air conditioner |
| US20220136741A1 (en) * | 2019-04-05 | 2022-05-05 | Mitsubishi Electric Corporation | Refrigeration cycle apparatus |
-
1993
- 1993-07-09 JP JP17043893A patent/JP3242217B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0727437A (en) | 1995-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0331666A (en) | Heat pump type air conditioner | |
| JPH05272829A (en) | Air-conditioner | |
| JPH06201220A (en) | Cooling and heating hybrid engine driving heat pump system | |
| JP3242217B2 (en) | Air conditioner | |
| JPH09119754A (en) | Air conditioner | |
| JP2531165B2 (en) | Vehicle air conditioner | |
| JPH08313096A (en) | Air conditioner | |
| JP3009481B2 (en) | Heat pump type air conditioner | |
| JP3133647B2 (en) | Air conditioner | |
| JP4572470B2 (en) | Operation control method of air conditioner | |
| JP2557940Y2 (en) | Air heat source heat pump air conditioner | |
| JPH0241917A (en) | Heat pump type air conditioning device for vehicle | |
| JPH0510191Y2 (en) | ||
| JPH08320172A (en) | Air conditioner | |
| JPS5886366A (en) | Air-conditioning hot-water supply device | |
| JPH0222604Y2 (en) | ||
| JPS60598Y2 (en) | Separate air conditioner/heater | |
| JPS6330929Y2 (en) | ||
| JPS6015084Y2 (en) | Refrigeration equipment | |
| JPS632859Y2 (en) | ||
| JPH0243014Y2 (en) | ||
| JPH08313098A (en) | Air conditioner | |
| JPH062066U (en) | Air conditioner | |
| KR19980066082A (en) | Heavy-duty air conditioner and heater unit | |
| JPH07294054A (en) | Air conditioner and operation controlling method therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |