JP2015017724A - Air conditioner - Google Patents

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JP2015017724A
JP2015017724A JP2013143724A JP2013143724A JP2015017724A JP 2015017724 A JP2015017724 A JP 2015017724A JP 2013143724 A JP2013143724 A JP 2013143724A JP 2013143724 A JP2013143724 A JP 2013143724A JP 2015017724 A JP2015017724 A JP 2015017724A
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heating
way valve
opened
expansion valve
refrigerant
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JP6039871B2 (en
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俊和 中倉
Toshikazu Nakakura
俊和 中倉
正巳 山口
Masami Yamaguchi
正巳 山口
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株式会社コロナ
Corona Corp
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Abstract

PROBLEM TO BE SOLVED: To appropriately perform a cooling operation and a heating operation by a refrigeration circuit and a floor heating operation by hot water.SOLUTION: In a case of a heating operation solely using an indoor unit, the heating operation is performed using the indoor unit while the four-way valve is opened to a heating side, an expansion valve A is slightly opened, an expansion valve B is fully opened, a two-way valve C is opened, an expansion valve D is set at an opening degree according to a heating capability, and a two-way valve E is closed. In a case of a heating operation using both the indoor unit and a floor heating function, the heating operation is performed using both the indoor unit and the floor heating function while the four-way valve is opened to the heating side, the expansion valve A is set at an opening degree according to the heating capability, the expansion valve B is also set at an opening degree according to the heating capability, the two-way valve C is opened, the expansion valve D is set at the opening degree according to the heating capability, and the two-way valve E is closed. In a case of a defrosting operation during the heating operation, the defrosting operation is performed in a state of continuing the heating operation using both the indoor unit and the floor heating function while the four-way valve is opened to the heating side, the expansion valve A is set at the opening degree according to the heating capability, the expansion valve B is set at the opening degree according to the heating capability, the two-way valve C is opened, the expansion valve D is set at the opening degree according to the heating capability, and the two-way valve E is opened.

Description

この発明は、夏期には冷媒循環による冷房運転を、冬期には冷媒循環による暖房運転と床暖房等の温水循環による温水暖房運転を同時に行う空気調和機に関するものである。   The present invention relates to an air conditioner that simultaneously performs a cooling operation by refrigerant circulation in summer and a heating operation by refrigerant circulation and hot water heating operation by hot water circulation such as floor heating in winter.
従来の空気調和機では、室外機を水平仕切板で上下に分割し、この仕切板の下部に冷凍回路室を、上部に温水回路室を形成し、前記冷凍回路室には圧縮機、膨張弁、蒸発器、送風ファン等を備え、前記温水回路室には水−冷媒熱交換器、温水タンク、循環ポンプと温水ヘッダーを備え、この温水ヘッダーと室内熱交換器を備えた室内機を温水連絡配管にて接続し、前記圧縮機、水−冷媒熱交換器、膨張弁、蒸発器等を接続して冷媒循環回路を形成し、前記水−冷媒熱交換器、温水タンク、循環ポンプ、温水連絡配管、室内熱交換器を接続して温水循環回路を形成し、前記冷媒循環回路にて蒸発器から汲み上げた熱を、水−冷媒熱交換器で温水循環経路に伝達し、前記室内熱交換器にて室内へ放熱して暖房を行うヒートポンプ式温水暖房装置に於いて、前記蒸発器をフィンチューブ式の熱交換器で形成し、前記水−冷媒熱交換器と膨張弁の間の冷媒循環回路に放熱器を前記蒸発器と一体に設けると共に、前記放熱器を蒸発器の風下側下端に位置させたことによって、暖房運転時の除霜運転で霜の溶け残りを防止することができ、除霜の効率を向上させることができる。
また、吐出圧力の上昇を抑え、圧縮機の消費電力増加を抑えることができ、高COPを実現できるものだった。(例えば、特許文献1参照)
In a conventional air conditioner, an outdoor unit is divided into upper and lower parts by a horizontal partition plate, a refrigeration circuit chamber is formed at the lower part of this partition plate, and a hot water circuit chamber is formed at the upper part. The hot water circuit room is equipped with a water-refrigerant heat exchanger, a hot water tank, a circulation pump and a hot water header. The indoor unit equipped with the hot water header and the indoor heat exchanger is connected with hot water. Connected by piping, connecting the compressor, water-refrigerant heat exchanger, expansion valve, evaporator, etc. to form a refrigerant circulation circuit, water-refrigerant heat exchanger, hot water tank, circulation pump, hot water communication A pipe and an indoor heat exchanger are connected to form a hot water circulation circuit, and the heat pumped up from the evaporator in the refrigerant circulation circuit is transmitted to the hot water circulation path by the water-refrigerant heat exchanger, and the indoor heat exchanger Heat pump type hot water heating system that heats indoors with heat The evaporator is formed by a fin tube type heat exchanger, and a radiator is provided integrally with the evaporator in a refrigerant circulation circuit between the water-refrigerant heat exchanger and an expansion valve. By being positioned at the lower end on the leeward side of the evaporator, it is possible to prevent frost from remaining in the defrosting operation during the heating operation and to improve the efficiency of the defrosting.
Further, it was possible to suppress an increase in discharge pressure, suppress an increase in power consumption of the compressor, and realize a high COP. (For example, see Patent Document 1)
特開2010-144965号公報JP 2010-144965 A
この従来例のヒートポンプ式温水暖房装置の室外熱交換器は、暖房運転では圧縮機の消費電力増加を抑えることができ、高COPを実現できるものだったが、冷房運転を行うことができなかった。また、この冷凍回路を利用して、水−冷媒熱交換器に並列に室内熱交換器を接続して、夏期には冷却された室内熱交換器からの冷風によって室内の冷房運転を行い、冬期には加熱された室内熱交換器からの温風による暖房運転と、水−冷媒熱交換器を経由した温水回路からの温水で行う床暖房運転と、前記温風による暖房運転と熱交換温水で行う床暖房運転を同時に行う併用暖房運転が行うことができるが、室内熱交換器を通過する冷媒量と水−冷媒熱交換器を通過する冷媒量を適確に調整する必要があった。   The outdoor heat exchanger of the heat pump type hot water heating apparatus of this conventional example can suppress the increase in power consumption of the compressor in the heating operation and can realize a high COP, but cannot perform the cooling operation. . In addition, using this refrigeration circuit, an indoor heat exchanger is connected in parallel to the water-refrigerant heat exchanger, and in the summer, the indoor air-cooling operation is performed by the cold air from the cooled indoor heat exchanger. The heating operation by the hot air from the heated indoor heat exchanger, the floor heating operation by the hot water from the hot water circuit via the water-refrigerant heat exchanger, the heating operation by the hot air and the heat exchange hot water Although the combined heating operation in which the floor heating operation to be performed can be performed at the same time, it is necessary to appropriately adjust the refrigerant amount passing through the indoor heat exchanger and the refrigerant amount passing through the water-refrigerant heat exchanger.
この発明はこの点に着目し上記欠点を解決する為、特にその構成を、圧縮機、四方弁、室内熱交換器、膨張弁、室外熱交換器等を冷媒配管で連結して冷凍回路を構成し、前記室内熱交換器と並列に水−冷媒熱交換器を接続し、この水−冷媒熱交換器と温水タンク、循環ポンプと床暖房等の暖房用熱交換器を温水配管で接続して温水回路を形成し、前記冷凍回路の切換によって室内機での冷房運転や暖房運転を行い、前記温水回路によって床暖房等の温水暖房を行う空気調和機に於いて、前記室外熱交換器は上部冷媒流路と下部冷媒流路の2つの冷媒流路を設け、前記冷凍回路は四方弁と室内熱交換器の間に二方弁Cを、前記室内熱交換器と下部冷媒流路の間に膨張弁Bを、前記水−冷媒熱交換器と下部冷媒流路の間に膨張弁Aを、前記上部冷媒流路と下部冷媒流路を接続する冷媒配管に膨張弁Dを、この膨張弁Dと上部冷媒流路の間の冷媒配管と圧縮機と四方弁の間の冷媒配管をバイパス管せ接続し、このバイパス管を開閉する二方弁Eを設け、冷房運転では前記四方弁を冷房側に、膨張弁Aは全閉に、膨張弁Bは冷房能力に応じた開度に、二方弁Cは開き、膨張弁Dは全開に、二方弁Eは閉じることで、室内機にて冷房運転を行い、室内機単独の暖房運転では前記四方弁を暖房側に、膨張弁Aは微開に、膨張弁Bは全開に、二方弁Cは開き、膨張弁Dは暖房能力に応じた開度に、二方弁Eは閉じることで、室内機にて暖房運転を行い、床暖房単独の暖房運転では前記四方弁を暖房側に、膨張弁Aは全開に、膨張弁Bは全閉に、二方弁Cは閉じ、膨張弁Dは暖房能力に応じた開度に、二方弁Eは閉じることで、床暖房運転を行い、室内機と床暖房の併用暖房運転では前記四方弁を暖房側に、膨張弁Aは暖房能力に応じた開度に、膨張弁Bも暖房能力に応じた開度に、二方弁Cは開き、膨張弁Dは暖房能力に応じた開度に、二方弁Eは閉じることで、室内機と床暖房の併用暖房運転を行い、暖房運転での除霜運転では前記四方弁を暖房側に、膨張弁Aは暖房能力に応じた開度に、膨張弁Bも暖房能力に応じた開度に、二方弁Cは開き、膨張弁Dは暖房能力に応じた開度に、二方弁Eは開くことで、室内機と床暖房の併用暖房運転を継続しながら除霜を行うものである。   The present invention pays attention to this point and solves the above-mentioned drawbacks. In particular, the configuration is such that a compressor, a four-way valve, an indoor heat exchanger, an expansion valve, an outdoor heat exchanger, etc. are connected by a refrigerant pipe to constitute a refrigeration circuit. A water-refrigerant heat exchanger is connected in parallel with the indoor heat exchanger, and the water-refrigerant heat exchanger, a hot water tank, a circulation pump, and a heating heat exchanger such as a floor heater are connected by hot water piping. In an air conditioner that forms a hot water circuit, performs cooling operation or heating operation in an indoor unit by switching the refrigeration circuit, and performs hot water heating such as floor heating by the hot water circuit, the outdoor heat exchanger is an upper part Two refrigerant channels, a refrigerant channel and a lower refrigerant channel, are provided, the refrigeration circuit includes a two-way valve C between the four-way valve and the indoor heat exchanger, and between the indoor heat exchanger and the lower refrigerant channel. The expansion valve B is connected between the water-refrigerant heat exchanger and the lower refrigerant flow path so that the expansion valve A is An expansion valve D is connected to the refrigerant pipe connecting the flow path and the lower refrigerant flow path, and the refrigerant pipe between the expansion valve D and the upper refrigerant flow path and the refrigerant pipe between the compressor and the four-way valve are connected by bypass, A two-way valve E that opens and closes the bypass pipe is provided. In the cooling operation, the four-way valve is set to the cooling side, the expansion valve A is fully closed, the expansion valve B is opened according to the cooling capacity, and the two-way valve C is Opening, expansion valve D is fully open, and two-way valve E is closed to perform cooling operation in the indoor unit. In heating operation of the indoor unit alone, the four-way valve is on the heating side, and expansion valve A is slightly open. The expansion valve B is fully opened, the two-way valve C is opened, the expansion valve D is opened according to the heating capacity, and the two-way valve E is closed. In operation, the four-way valve is set to the heating side, the expansion valve A is fully opened, the expansion valve B is fully closed, the two-way valve C is closed, and the expansion valve D is opened according to the heating capacity. By closing the two-way valve E, the floor heating operation is performed. In the combined heating operation of the indoor unit and the floor heating, the four-way valve is set to the heating side, the expansion valve A is set to an opening according to the heating capacity, and the expansion valve B is also set. The two-way valve C opens, the expansion valve D opens to the opening according to the heating capacity, and the two-way valve E closes to perform the heating operation of the indoor unit and floor heating. In the defrosting operation in the heating operation, the four-way valve is opened to the heating side, the expansion valve A is opened according to the heating capacity, the expansion valve B is opened according to the heating capacity, the two-way valve C is opened, and the expansion is performed. The valve D is opened according to the heating capacity, and the two-way valve E is opened to perform defrosting while continuing the combined heating operation of the indoor unit and floor heating.
この発明によれば、夏期には冷却された室内熱交換器からの冷風によって室内の冷房運転を行い、冬期には加熱された室内熱交換器からの温風による暖房運転と、水−冷媒熱交換器を経由した温水回路からの温水で行う床暖房運転と、前記温風による暖房運転と熱交換温水で行う床暖房運転を同時に行う併用暖房運転が行い、室内熱交換器を通過する冷媒量と水−冷媒熱交換器を通過する冷媒量を適確に調整することができ、暖房運転時の除霜運転では暖房運転および床暖房運転を停止する必要がなく、極端な室温低下を防止することができる。また、室内機の単独暖房運転時には膨張弁Aが少しだけ開くことで水−冷媒熱交換器に冷媒が溜まり込み、冷凍回路内を循環する冷媒量が減少することで冷凍回路内のバランスが崩れて能力不足等の不具合が発生することを防止できるものである。   According to the present invention, indoor cooling operation is performed by cool air from a cooled indoor heat exchanger in the summer, and heating operation by warm air from the heated indoor heat exchanger is performed in the winter, and water-refrigerant heat is generated. The amount of refrigerant that passes through the indoor heat exchanger when the floor heating operation using hot water from the hot water circuit via the exchanger and the combined heating operation that simultaneously performs the heating operation using the warm air and the floor heating operation using heat exchange hot water are performed. And the amount of refrigerant passing through the water-refrigerant heat exchanger can be accurately adjusted, and in the defrosting operation during heating operation, it is not necessary to stop the heating operation and floor heating operation, thus preventing an extreme decrease in room temperature. be able to. In addition, when the indoor unit is individually heated, the expansion valve A is opened slightly, so that the refrigerant accumulates in the water-refrigerant heat exchanger, and the amount of refrigerant circulating in the refrigeration circuit decreases, so that the balance in the refrigeration circuit is lost. It is possible to prevent problems such as lack of capacity.
この発明一実施例の概略説明図。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 同弁装置類の動作説明図。Operation | movement explanatory drawing of the valve apparatus.
次に、この発明に係る空気調和機を図面に示された一実施例で説明する。
1は空気調和機の室外機で、水平仕切板2にて上下2室に分けられ、下部には冷凍回路室3を、上部には温水回路室4を備え、冷媒連絡配管5によって室内機6と、温水連絡配管7によって床暖房パネル8と接続されている。
前記冷凍回路室3の内部には圧縮機9、四方弁10、室外熱交換器11、各種弁装置12、送風ファン13と冷凍回路制御部14等を設けている。
前記温水回路室4の内部には、水−冷媒熱交換器15、補助ヒータ16、温水タンク17、循環ポンプ18、温水ヘッダー19と温水回路制御部20等を設けている。
前記室内機6内にはフィンチューブ式の室内熱交換器21と室内送風ファン22と室内制御部23を備えている。
Next, an air conditioner according to the present invention will be described with reference to an embodiment shown in the drawings.
Reference numeral 1 denotes an outdoor unit of an air conditioner, which is divided into two upper and lower chambers by a horizontal partition plate 2, which includes a refrigeration circuit chamber 3 at a lower portion and a hot water circuit chamber 4 at an upper portion, and an indoor unit 6 by a refrigerant communication pipe 5. Are connected to the floor heating panel 8 by a hot water communication pipe 7.
Inside the refrigeration circuit chamber 3, a compressor 9, a four-way valve 10, an outdoor heat exchanger 11, various valve devices 12, a blower fan 13, a refrigeration circuit control unit 14, and the like are provided.
Inside the hot water circuit chamber 4, a water-refrigerant heat exchanger 15, an auxiliary heater 16, a hot water tank 17, a circulation pump 18, a hot water header 19, a hot water circuit control unit 20, and the like are provided.
The indoor unit 6 includes a fin tube type indoor heat exchanger 21, an indoor fan 22, and an indoor controller 23.
24は前記圧縮機9と四方弁10、水−冷媒熱交換器15、各種弁装置12、室外熱交換器11を冷媒配管25で連通した冷凍回路で、前記四方弁10と水−冷媒熱交換器15の間には水−冷媒熱交換器15側と室内熱交換器21側に冷媒を分岐する分岐管26を、水−冷媒熱交換器15と室外熱交換器11の間にも同じく分岐管27を設けている。
前記分岐管26と分岐管27は冷媒接続バルブ28と前記冷媒連絡配管5を介して室内熱交換器21と接続される。
Reference numeral 24 denotes a refrigeration circuit in which the compressor 9, the four-way valve 10, the water-refrigerant heat exchanger 15, the various valve devices 12, and the outdoor heat exchanger 11 are communicated with each other through a refrigerant pipe 25, and the four-way valve 10 and the water-refrigerant heat exchange. A branch pipe 26 that branches the refrigerant to the water-refrigerant heat exchanger 15 side and the indoor heat exchanger 21 side is also branched between the water-refrigerant heat exchanger 15 and the outdoor heat exchanger 11. A tube 27 is provided.
The branch pipe 26 and the branch pipe 27 are connected to the indoor heat exchanger 21 via the refrigerant connection valve 28 and the refrigerant communication pipe 5.
前記室外熱交換器11は多数の薄板状アルミニューム製フィンを銅管で貫通したフィンチューブ式の熱交換器で、冷媒流路を上下に分割し、上部冷媒流路29は大きく、その下部に比較的小さな下部冷媒流路30を設けている。   The outdoor heat exchanger 11 is a fin-tube heat exchanger in which a large number of thin aluminum fins are penetrated by copper pipes. The refrigerant flow path is divided into upper and lower parts, the upper refrigerant flow path 29 is large, and the lower part thereof A relatively small lower refrigerant flow path 30 is provided.
前記各種弁装置12は膨張弁A、膨張弁B、二方弁C、膨張弁D、二方弁Eの3個の膨張弁と2個の二方弁から成り、後述するそれぞれの位置に設けられている。
前記水−冷媒熱交換器15と分岐管27の間には膨張弁Aを、前記分岐管27と冷媒接続バルブ28の間には膨張弁Bを、前記分岐管26と冷媒接続バルブ28の間には二方弁Cを、前記室外熱交換器11の上部冷媒流路29と下部冷媒流路30を接続する接続管31には膨張弁Dを設けている。
The various valve devices 12 are composed of three expansion valves, an expansion valve A, an expansion valve B, a two-way valve C, an expansion valve D, and a two-way valve E, and two two-way valves. It has been.
An expansion valve A is provided between the water-refrigerant heat exchanger 15 and the branch pipe 27, an expansion valve B is provided between the branch pipe 27 and the refrigerant connection valve 28, and between the branch pipe 26 and the refrigerant connection valve 28. The two-way valve C is provided, and an expansion valve D is provided in the connecting pipe 31 connecting the upper refrigerant passage 29 and the lower refrigerant passage 30 of the outdoor heat exchanger 11.
32は前記圧縮機9と四方弁10の間と、前記膨張弁Dと上部冷媒流路29の間を接続するバイパス管で、このバイパス管32に備えた二方弁Eによって暖房運転の除霜時に開放され、圧縮機1のホットガスが上部冷媒流路29に送られるものである。   Reference numeral 32 denotes a bypass pipe that connects between the compressor 9 and the four-way valve 10 and between the expansion valve D and the upper refrigerant flow path 29. The two-way valve E provided in the bypass pipe 32 defrosts the heating operation. It is sometimes opened and the hot gas of the compressor 1 is sent to the upper refrigerant flow path 29.
冷房運転では前記四方弁10を冷房側に切換え、膨張弁Aは全閉に、膨張弁Bは冷房能力に応じた開度に、二方弁Cは開き、膨張弁Dは全開に、二方弁Eは閉じることで、圧縮機1にて加圧され高温の冷媒は、四方弁10、上部冷媒流路29、膨張弁D、下部冷媒流路30を通過することで放熱し、膨張弁Bで減圧し、室内熱交換器21で低温になり室内送風ファン22にて冷風を室内に送ることで冷房が行われる。   In the cooling operation, the four-way valve 10 is switched to the cooling side, the expansion valve A is fully closed, the expansion valve B is opened according to the cooling capacity, the two-way valve C is opened, the expansion valve D is fully opened, By closing the valve E, the high-pressure refrigerant pressurized by the compressor 1 dissipates heat by passing through the four-way valve 10, the upper refrigerant flow path 29, the expansion valve D, and the lower refrigerant flow path 30, and the expansion valve B Then, the temperature is reduced by the indoor heat exchanger 21, and cooling is performed by sending cool air into the room by the indoor fan 22.
室内機単独の暖房運転では前記四方弁10を暖房側に切換え、膨張弁Aは微開に、膨張弁Bは全開に、二方弁Cは開き、膨張弁Dは暖房能力に応じた開度に、二方弁Eは閉じることで、圧縮機1にて加圧され高温の冷媒は、四方弁10、二方弁C、室内熱交換器21で室内を加熱して暖房を行い、膨張弁Dは全開で通過し、下部冷媒流路30を加熱した後、膨張弁Dで絞られて減圧することで低温になった冷媒が上部冷媒流路29を低温にして空気から吸熱し圧縮機9へ送られる。ここでは、下部冷媒流路30によって吐出圧力の上昇を抑えことができるので、圧縮機9の消費電力増加を抑えることができ、高COPを実現できる。また、除霜運転での溶け残りを防止することができ、除霜の効率を向上させることができるものである。また、室内機の単独暖房運転時には膨張弁Aが少しだけ開くことで水−冷媒熱交換器に冷媒が溜まり込み、冷凍回路内を循環する冷媒量が減少することで冷凍回路内のバランスが崩れて能力不足等の不具合が発生することを防止できるものである。   In the heating operation of the indoor unit alone, the four-way valve 10 is switched to the heating side, the expansion valve A is slightly opened, the expansion valve B is fully opened, the two-way valve C is opened, and the expansion valve D is opened according to the heating capacity. In addition, the two-way valve E is closed so that the high-temperature refrigerant pressurized by the compressor 1 is heated by heating the room with the four-way valve 10, the two-way valve C, and the indoor heat exchanger 21, and the expansion valve. D passes through fully open, heats the lower refrigerant flow path 30, and is squeezed by the expansion valve D to depressurize, so that the low temperature refrigerant lowers the upper refrigerant flow path 29 and absorbs heat from the air. Sent to. Here, since the increase in discharge pressure can be suppressed by the lower refrigerant flow path 30, an increase in power consumption of the compressor 9 can be suppressed, and a high COP can be realized. Further, it is possible to prevent unmelted residue in the defrosting operation and improve the efficiency of defrosting. In addition, when the indoor unit is individually heated, the expansion valve A is opened slightly, so that the refrigerant accumulates in the water-refrigerant heat exchanger, and the amount of refrigerant circulating in the refrigeration circuit decreases, so that the balance in the refrigeration circuit is lost. It is possible to prevent problems such as lack of capacity.
床暖房単独の暖房運転では前記四方弁10を暖房側に、膨張弁Aは全開に、膨張弁Bは全閉に、二方弁Cは閉じ、膨張弁Dは暖房能力に応じた開度に、二方弁Eは閉じることで、圧縮機1にて加圧され高温の冷媒は、四方弁10、水−冷媒熱交換器15で温水回路33を加熱して床暖房パネル8による暖房を行うものである。   In the heating operation of floor heating alone, the four-way valve 10 is set to the heating side, the expansion valve A is fully opened, the expansion valve B is fully closed, the two-way valve C is closed, and the expansion valve D is opened according to the heating capacity. When the two-way valve E is closed, the high-temperature refrigerant pressurized by the compressor 1 is heated by the floor heating panel 8 by heating the hot water circuit 33 with the four-way valve 10 and the water-refrigerant heat exchanger 15. Is.
室内機と床暖房の併用暖房運転では前記四方弁10を暖房側に、膨張弁Aは暖房能力に応じた開度に、膨張弁Bも暖房能力に応じた開度に、二方弁Cは開き、膨張弁Dは暖房能力に応じた開度に、二方弁Eは閉じることで、室内機での暖房と床暖房の重要度や使用者の好みに応じて膨張弁Aと膨張弁Bの開度を調整して室内機側と床暖房側の熱の分配量を調整した後、膨張弁Dによって上部冷媒流路29にて適切な冷媒の蒸発が行われるように開度を調整する。   In the combined heating operation of the indoor unit and floor heating, the four-way valve 10 is set to the heating side, the expansion valve A is set to an opening corresponding to the heating capacity, the expansion valve B is set to the opening corresponding to the heating capacity, and the two-way valve C is set to The expansion valve D is opened according to the heating capacity, and the two-way valve E is closed, so that the expansion valve A and the expansion valve B according to the importance of the heating and floor heating in the indoor unit and the user's preference. After adjusting the amount of heat distribution between the indoor unit side and the floor heating side, the degree of opening is adjusted so that appropriate refrigerant is evaporated in the upper refrigerant flow path 29 by the expansion valve D. .
暖房運転での除霜運転では前記四方弁10を暖房側に、膨張弁Aは出力を下げた暖房能力の開度に、膨張弁Bも出力を下げた暖房能力の開度に、二方弁Cは開き、膨張弁Dも出力を下げた暖房能力の開度に、二方弁Eは開くことでバイパス管32を通って圧縮機9から高温の冷媒が直接上部冷媒流路29に流れて、室内機と床暖房の併用暖房運転を継続しながら除霜を行うことができるものである。   In the defrosting operation in the heating operation, the four-way valve 10 is set to the heating side, the expansion valve A is set to the opening degree of the heating capability with the output reduced, and the expansion valve B is set to the opening degree of the heating capability with the output reduced. C opens, the opening of the expansion valve D also decreases the output, and the two-way valve E opens so that the high-temperature refrigerant flows from the compressor 9 directly to the upper refrigerant flow path 29 through the bypass pipe 32. The defrosting can be performed while continuing the combined heating operation of the indoor unit and floor heating.
前記温水回路33は水−冷媒熱交換器15と補助ヒータ16、温水タンク17、循環ポンプ18とを、前記温水ヘッダー19と温水連絡配管7を介して床暖房パネル8に温水配管34で連通した温水回路で、前記循環ポンプ18と温水ヘッダー19の間と、温水ヘッダー19と水−冷媒熱交換器15の間を温水バイパス回路35で接続して温水の循環量を調整している。36は温水接続バルブで、前記温水連絡配管7と床暖房パネル8を接続するものである。   In the hot water circuit 33, the water-refrigerant heat exchanger 15, the auxiliary heater 16, the hot water tank 17, and the circulation pump 18 are communicated with the floor heating panel 8 through the hot water header 19 and the hot water connection pipe 7 through the hot water pipe 34. In the warm water circuit, the circulation amount of warm water is adjusted by connecting the circulation pump 18 and the warm water header 19 and between the warm water header 19 and the water-refrigerant heat exchanger 15 by the warm water bypass circuit 35. Reference numeral 36 denotes a hot water connection valve for connecting the hot water communication pipe 7 and the floor heating panel 8.
前記室内熱交換器21と水−冷媒熱交換器15は冷凍回路24に対して並列に接続されており、二つの膨張弁A・Bと二方弁C、四方弁10の切換で、冷房運転時には室内熱交換器21側のみに冷媒を循環させて室内を冷房し、暖房運転時には室内熱交換器21と水−冷媒熱交換器15の両方に冷媒を循環させて室内機6では温風による暖房運転を、床暖房パネル8では温水循環による床暖房運転を同時又はどちらか一方のみで暖房運転を行うものである。   The indoor heat exchanger 21 and the water-refrigerant heat exchanger 15 are connected in parallel to the refrigeration circuit 24. By switching between the two expansion valves A and B, the two-way valve C, and the four-way valve 10, the cooling operation is performed. Sometimes the refrigerant is circulated only to the indoor heat exchanger 21 side to cool the room, and during the heating operation, the refrigerant is circulated to both the indoor heat exchanger 21 and the water-refrigerant heat exchanger 15, and the indoor unit 6 is heated by hot air. In the floor heating panel 8, the heating operation is performed at the same time or only one of the floor heating operation by the hot water circulation.
前記圧縮機9は冷凍回路制御部14に備えたインバータ駆動回路(図示せず)にて必要な熱量に応じて多段階に回転数を変化するものである。
前記膨張弁A・B・Dは電子式の膨張弁で圧縮機9の回転数や冷凍回路の各部温度等によって、冷凍回路制御部14にて開度が制御され、前記二方弁C・Eは運転モードに応じて、同じく冷凍回路制御部14にて開閉されるものである。
前記送風ファン13は樹脂製のプロペラファンで、回転数可変の送風モータ(図示せず)によって回転し、前記室外熱交換器11に送風して熱交換を行うものである。
The compressor 9 changes the rotational speed in multiple stages according to the amount of heat required by an inverter drive circuit (not shown) provided in the refrigeration circuit control unit 14.
The expansion valves A, B, and D are electronic expansion valves whose opening degree is controlled by the refrigeration circuit control unit 14 according to the rotational speed of the compressor 9, the temperature of each part of the refrigeration circuit, and the like, and the two-way valves C and E Is opened and closed by the refrigeration circuit controller 14 according to the operation mode.
The blower fan 13 is a resin propeller fan, which is rotated by a blower motor (not shown) having a variable number of rotations, and blows air to the outdoor heat exchanger 11 to perform heat exchange.
前記室内機6は室内送風ファン22の駆動で、前面及び上面に備えた吸込口(図示せず)から室内の空気を吸い込んで、前記室内熱交換器21で熱交換した後、前面下部に備えた吹出口(図示せず)から室内へ温度調整された空気を送風するものである。
37は室内機6と冷媒連絡配管5を接続する冷媒接続バルブである。
The indoor unit 6 is driven by an indoor blower fan 22 and sucks indoor air from a suction port (not shown) provided on the front surface and the upper surface, and exchanges heat with the indoor heat exchanger 21, and then is provided at the lower front surface. The air whose temperature is adjusted is blown into the room from the air outlet (not shown).
Reference numeral 37 denotes a refrigerant connection valve that connects the indoor unit 6 and the refrigerant communication pipe 5.
前記水−冷媒熱交換器15は、外管の内部に内管を挿入した二重管で構成されている。内管の外表面は、多数のフィンを立設し、内管の内外における熱交換効率を高めるように構成されている。この二重管の内管内部を水が通過する温水経路(図示せず)とし、内管と外管との間を冷媒が通過する冷媒経路(図示せず)とすることにより、冷媒と水との間で熱交換して通過する水を加熱することが可能となる。   The water-refrigerant heat exchanger 15 is composed of a double pipe having an inner pipe inserted into the outer pipe. The outer surface of the inner pipe is configured so that a large number of fins are erected to increase the heat exchange efficiency inside and outside the inner pipe. By making a hot water path (not shown) through which water passes inside the inner pipe of the double pipe and a refrigerant path (not shown) through which refrigerant passes between the inner pipe and the outer pipe, It is possible to heat the water passing through the heat exchange.
38は前記圧縮機9吐出側の冷媒配管に取り付けられた吐出温センサで、圧縮機9の吐出温度を測定し、前記冷凍回路制御部14へ信号を送る。39は冷凍回路室3内の室外送風経路(図示せず)の上流側に設けられた外気温センサで、外気温を測定する。40は前記室外熱交換器11に取り付けられ室外熱交換器11の温度を測定して、除霜運転を制御するための熱交センサである。41は水−冷媒熱交換器15の中程に取り付けられ、冷媒の温度を測定する冷媒中間センサである。   Reference numeral 38 denotes a discharge temperature sensor attached to the refrigerant pipe on the discharge side of the compressor 9, which measures the discharge temperature of the compressor 9 and sends a signal to the refrigeration circuit control unit 14. Reference numeral 39 denotes an outside air temperature sensor provided on the upstream side of an outdoor air flow path (not shown) in the refrigeration circuit chamber 3, and measures the outside air temperature. Reference numeral 40 denotes a heat exchange sensor that is attached to the outdoor heat exchanger 11 and measures the temperature of the outdoor heat exchanger 11 to control the defrosting operation. Reference numeral 41 denotes a refrigerant intermediate sensor that is attached to the middle of the water-refrigerant heat exchanger 15 and measures the temperature of the refrigerant.
42は前記水−冷媒熱交換器15と補助ヒータ16の間の温水配管に取り付けられ配管温度を測定する往き温水センサ。43は前記補助ヒータ16と温水タンク17の間の温水配管に取り付けられ配管温度を測定するヒータ配管センサ。44は床暖房パネル8と水−冷媒熱交換器15の間の温水配管に取り付けられ配管温度を測定する戻り温水センサである。45は補助ヒータ16の過熱を検知する安全サーモで、補助ヒータ16の上面に2つ取り付けられている。46は室内空気の吸込側に設けた室温センサ。   An outgoing hot water sensor 42 is attached to a hot water pipe between the water-refrigerant heat exchanger 15 and the auxiliary heater 16 and measures the pipe temperature. A heater pipe sensor 43 is attached to a hot water pipe between the auxiliary heater 16 and the hot water tank 17 and measures the pipe temperature. A return hot water sensor 44 is attached to a hot water pipe between the floor heating panel 8 and the water-refrigerant heat exchanger 15 and measures the pipe temperature. Reference numeral 45 denotes a safety thermo that detects overheating of the auxiliary heater 16, and two are attached to the upper surface of the auxiliary heater 16. Reference numeral 46 denotes a room temperature sensor provided on the indoor air suction side.
このように、夏期には冷却された室内熱交換器からの冷風によって室内の冷房運転を行い、冬期には加熱された室内熱交換器からの温風による暖房運転と、水−冷媒熱交換器を経由した温水回路からの温水で行う床暖房運転と、前記温風による暖房運転と熱交換温水で行う床暖房運転を同時に行う併用暖房運転が行い、室内熱交換器を通過する冷媒量と水−冷媒熱交換器を通過する冷媒量を適確に調整することができ、暖房運転時の除霜運転では暖房運転および床暖房運転を停止する必要がなく、極端な室温低下を防止することができる。
また、暖房運転では除霜運転での溶け残りを防止することができ、除霜の効率を向上させることができる。また、吐出圧力の上昇を抑え、圧縮機の消費電力増加を抑えることができ、高COPを実現できる。また、室内機の単独暖房運転時には膨張弁Aが少しだけ開くことで水−冷媒熱交換器に冷媒が溜まり込み、冷凍回路内を循環する冷媒量が減少することで冷凍回路内のバランスが崩れて能力不足等の不具合が発生することを防止できるものである。
As described above, in the summer, the indoor air-cooling operation is performed by the cold air from the cooled indoor heat exchanger, and in the winter, the air-warming operation by the hot air from the heated indoor heat exchanger and the water-refrigerant heat exchanger are performed. The floor heating operation performed with hot water from the hot water circuit via the air heater, the combined heating operation in which the heating operation with the warm air and the floor heating operation performed with heat exchange hot water are performed simultaneously, and the refrigerant amount and water passing through the indoor heat exchanger are performed. -The amount of refrigerant passing through the refrigerant heat exchanger can be adjusted accurately, and it is not necessary to stop the heating operation and floor heating operation in the defrosting operation at the time of heating operation, thereby preventing an extreme decrease in room temperature. it can.
Moreover, in heating operation, unmelted residue in the defrosting operation can be prevented, and the efficiency of defrosting can be improved. In addition, increase in discharge pressure can be suppressed, increase in power consumption of the compressor can be suppressed, and high COP can be realized. In addition, when the indoor unit is individually heated, the expansion valve A is opened slightly, so that the refrigerant accumulates in the water-refrigerant heat exchanger, and the amount of refrigerant circulating in the refrigeration circuit decreases, so that the balance in the refrigeration circuit is lost. It is possible to prevent problems such as lack of capacity.
1 室外機
6 室内機
8 床暖房パネル
9 圧縮機
11 室外熱交換器
15 水−冷媒熱交換器
21 室内熱交換器
29 上側冷媒流通経路
30 下側冷媒流通経路
A 膨張弁
B 膨張弁
C 二方弁
D 膨張弁
E 二方弁
DESCRIPTION OF SYMBOLS 1 Outdoor unit 6 Indoor unit 8 Floor heating panel 9 Compressor 11 Outdoor heat exchanger 15 Water-refrigerant heat exchanger 21 Indoor heat exchanger 29 Upper refrigerant flow path 30 Lower refrigerant flow path A Expansion valve B Expansion valve C Two-way Valve D Expansion valve E Two-way valve

Claims (1)

  1. 圧縮機、四方弁、室内熱交換器、膨張弁、室外熱交換器等を冷媒配管で連結して冷凍回路を構成し、前記室内熱交換器と並列に水−冷媒熱交換器を接続し、この水−冷媒熱交換器と温水タンク、循環ポンプと床暖房等の暖房用熱交換器を温水配管で接続して温水回路を形成し、前記冷凍回路の切換によって室内機での冷房運転や暖房運転を行い、前記温水回路によって床暖房等の温水暖房を行う空気調和機に於いて、
    前記室外熱交換器は上部冷媒流路と下部冷媒流路の2つの冷媒流路を設け、
    前記冷凍回路は四方弁と室内熱交換器の間に二方弁Cを、
    前記室内熱交換器と下部冷媒流路の間に膨張弁Bを、
    前記水−冷媒熱交換器と下部冷媒流路の間に膨張弁Aを、
    前記上部冷媒流路と下部冷媒流路を接続する冷媒配管に膨張弁Dを、
    この膨張弁Dと上部冷媒流路の間の冷媒配管と圧縮機と四方弁の間の冷媒配管をバイパス管せ接続し、このバイパス管を開閉する二方弁Eを設け、
    冷房運転では前記四方弁を冷房側に、膨張弁Aは全閉に、膨張弁Bは冷房能力に応じた開度に、二方弁Cは開き、膨張弁Dは全開に、二方弁Eは閉じることで、室内機にて冷房運転を行い、
    室内機単独の暖房運転では前記四方弁を暖房側に、膨張弁Aは微開に、膨張弁Bは全開に、二方弁Cは開き、膨張弁Dは暖房能力に応じた開度に、二方弁Eは閉じることで、室内機にて暖房運転を行い、
    床暖房単独の暖房運転では前記四方弁を暖房側に、膨張弁Aは全開に、膨張弁Bは全閉に、二方弁Cは閉じ、膨張弁Dは暖房能力に応じた開度に、二方弁Eは閉じることで、床暖房運転を行い、
    室内機と床暖房の併用暖房運転では前記四方弁を暖房側に、膨張弁Aは暖房能力に応じた開度に、膨張弁Bも暖房能力に応じた開度に、二方弁Cは開き、膨張弁Dは暖房能力に応じた開度に、二方弁Eは閉じることで、室内機と床暖房の併用暖房運転を行い、
    暖房運転での除霜運転では前記四方弁を暖房側に、膨張弁Aは暖房能力に応じた開度に、膨張弁Bも暖房能力に応じた開度に、二方弁Cは開き、膨張弁Dは暖房能力に応じた開度に、二方弁Eは開くことで、室内機と床暖房の併用暖房運転を継続しながら除霜を行うことを特徴とする空気調和機。
    A compressor, a four-way valve, an indoor heat exchanger, an expansion valve, an outdoor heat exchanger, etc. are connected by refrigerant piping to form a refrigeration circuit, and a water-refrigerant heat exchanger is connected in parallel with the indoor heat exchanger, This water-refrigerant heat exchanger and a hot water tank, a circulation heat pump and a heating heat exchanger such as floor heating are connected by a hot water pipe to form a hot water circuit, and by switching the refrigeration circuit, cooling operation and heating in an indoor unit In an air conditioner that operates and performs hot water heating such as floor heating by the hot water circuit,
    The outdoor heat exchanger is provided with two refrigerant channels, an upper refrigerant channel and a lower refrigerant channel,
    The refrigeration circuit has a two-way valve C between the four-way valve and the indoor heat exchanger,
    An expansion valve B is provided between the indoor heat exchanger and the lower refrigerant flow path.
    An expansion valve A is provided between the water-refrigerant heat exchanger and the lower refrigerant flow path.
    An expansion valve D is connected to the refrigerant pipe connecting the upper refrigerant flow path and the lower refrigerant flow path.
    The refrigerant pipe between the expansion valve D and the upper refrigerant flow path and the refrigerant pipe between the compressor and the four-way valve are connected by bypass, and a two-way valve E for opening and closing the bypass pipe is provided,
    In the cooling operation, the four-way valve is set to the cooling side, the expansion valve A is fully closed, the expansion valve B is opened according to the cooling capacity, the two-way valve C is opened, the expansion valve D is fully opened, and the two-way valve E Is closed, and air-conditioning operation is performed in the indoor unit.
    In the heating operation of the indoor unit alone, the four-way valve is on the heating side, the expansion valve A is slightly opened, the expansion valve B is fully opened, the two-way valve C is opened, and the expansion valve D is opened according to the heating capacity. By closing the two-way valve E, heating operation is performed in the indoor unit.
    In the heating operation of floor heating alone, the four-way valve is set to the heating side, the expansion valve A is fully opened, the expansion valve B is fully closed, the two-way valve C is closed, and the expansion valve D is opened according to the heating capacity. By closing the two-way valve E, floor heating operation is performed.
    In the combined heating operation of the indoor unit and floor heating, the four-way valve is opened to the heating side, the expansion valve A is opened according to the heating capacity, the expansion valve B is opened according to the heating capacity, and the two-way valve C is opened. The expansion valve D has an opening according to the heating capacity, and the two-way valve E is closed to perform a combined heating operation of the indoor unit and floor heating,
    In the defrosting operation in the heating operation, the four-way valve is opened to the heating side, the expansion valve A is opened according to the heating capacity, the expansion valve B is opened according to the heating capacity, the two-way valve C is opened, and the expansion is performed. An air conditioner that performs defrosting while continuing the combined heating operation of the indoor unit and floor heating by opening the two-way valve E at an opening degree corresponding to the heating capacity and the valve D.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112254367A (en) * 2020-09-04 2021-01-22 海信(山东)空调有限公司 Multi-connected air conditioning system, control system and control method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010159926A (en) * 2009-01-08 2010-07-22 Mitsubishi Heavy Ind Ltd Air conditioner
JP2012141113A (en) * 2011-01-06 2012-07-26 Daikin Industries Ltd Air conditioning/water heating device system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010159926A (en) * 2009-01-08 2010-07-22 Mitsubishi Heavy Ind Ltd Air conditioner
JP2012141113A (en) * 2011-01-06 2012-07-26 Daikin Industries Ltd Air conditioning/water heating device system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112254367A (en) * 2020-09-04 2021-01-22 海信(山东)空调有限公司 Multi-connected air conditioning system, control system and control method

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