JP2002243296A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP2002243296A JP2002243296A JP2001042764A JP2001042764A JP2002243296A JP 2002243296 A JP2002243296 A JP 2002243296A JP 2001042764 A JP2001042764 A JP 2001042764A JP 2001042764 A JP2001042764 A JP 2001042764A JP 2002243296 A JP2002243296 A JP 2002243296A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- refrigerant
- heat exchanger
- refrigerant pipe
- valve
- 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.)
- Pending
Links
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、空気調和機に係わ
り、より詳細には、室内熱交換器と室外熱交換器とに設
けられた複数の冷媒流路の構成に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly, to a structure of a plurality of refrigerant passages provided in an indoor heat exchanger and an outdoor heat exchanger.
【０００２】[0002]
【従来の技術】従来の空気調和機は冷媒回路を、例えば
図４で示すように、圧縮機１と四方弁２と室外熱交換器
３１と膨張弁５と室内熱交換器３２とを順次接続して冷
凍サイクルを構成している。前記室外熱交換器３１には
冷媒流路３１ａと冷媒流路３１ｂとが設けられ、また前
記室内熱交換器３２に冷媒流路３２ａと冷媒流路３２ｂ
とが設けられており、冷房運転時、前記圧縮機１から吐
出された冷媒は、前記四方弁２を介して前記室外熱交換
器３１に流入し、同室外熱交換器３１で熱を放出して凝
縮し、続いて前記膨張弁５を介して前記室内熱交換器３
２に流入し、同室内熱交換器３２で蒸発して熱を吸収し
前記四方弁２を介して前記圧縮機１に還流するようにな
っている。暖房運転時は、前記圧縮機１から吐出された
冷媒は前記四方弁２を介して前記室内熱交換器３２に流
入し、同室内熱交換器３２で熱を放出して凝縮し、続い
て前記膨張弁５を介して前記室外熱交換器３１に流入
し、同室外熱交換器３１で熱を吸収して蒸発し、前記四
方弁２を介して前記圧縮機１に還流するようになってい
る。2. Description of the Related Art In a conventional air conditioner, a compressor circuit, a four-way valve 2, an outdoor heat exchanger 31, an expansion valve 5, and an indoor heat exchanger 32 are sequentially connected as shown in FIG. To form a refrigeration cycle. The outdoor heat exchanger 31 is provided with a refrigerant channel 31a and a refrigerant channel 31b, and the indoor heat exchanger 32 is provided with a refrigerant channel 32a and a refrigerant channel 32b.
During the cooling operation, the refrigerant discharged from the compressor 1 flows into the outdoor heat exchanger 31 via the four-way valve 2 and releases heat in the outdoor heat exchanger 31. Condensed, and then through the expansion valve 5, the indoor heat exchanger 3
2, is evaporated in the indoor heat exchanger 32, absorbs heat, and is returned to the compressor 1 through the four-way valve 2. During the heating operation, the refrigerant discharged from the compressor 1 flows into the indoor heat exchanger 32 through the four-way valve 2 and releases heat in the indoor heat exchanger 32 to be condensed. The heat flows into the outdoor heat exchanger 31 through the expansion valve 5, absorbs heat in the outdoor heat exchanger 31, evaporates, and returns to the compressor 1 through the four-way valve 2. .
【０００３】しかしながら、前記室外熱交換器３１と前
記室内熱交換器３２とは同数の冷媒流路を備えており、
冷房運転時あるいは暖房運転時において、前記冷媒流路
３１ａ及び前記冷媒流路３１ｂと、前記冷媒流路３２ａ
及び前記冷媒流路３２ｂとを流れる冷媒の流量及び流速
はほぼ同等である。冷房運転時において、前記室外熱交
換器３１を流れる冷媒は、凝縮して液化する過程で流速
が大きい方が熱伝達率が良く、前記室内熱交換器３２を
流れる冷媒は、蒸発する過程で流速が小さい方が前記冷
媒流路３２ａ及び前記冷媒流路３２ｂ内での圧力損失が
小さく熱伝達率が向上する。これらにより前記室外熱交
換器３１及び前記室内熱交換器３２を流れる冷媒の流量
及び流速を変化させて冷房運転あるいは暖房運転の効率
を向上させる空気調和機が望まれていた。[0003] However, the outdoor heat exchanger 31 and the indoor heat exchanger 32 have the same number of refrigerant flow paths,
During the cooling operation or the heating operation, the refrigerant flow path 31a and the refrigerant flow path 31b and the refrigerant flow path 32a
The flow rate and the flow rate of the refrigerant flowing through the refrigerant flow path 32b are substantially the same. During the cooling operation, the refrigerant flowing through the outdoor heat exchanger 31 has a higher heat transfer coefficient in the process of condensing and liquefying, and has a higher heat transfer coefficient. The refrigerant flowing in the indoor heat exchanger 32 has a higher flow rate in the process of evaporating. Is smaller, the pressure loss in the refrigerant passage 32a and the refrigerant passage 32b is smaller, and the heat transfer coefficient is improved. Accordingly, an air conditioner that improves the efficiency of the cooling operation or the heating operation by changing the flow rate and the flow velocity of the refrigerant flowing through the outdoor heat exchanger 31 and the indoor heat exchanger 32 has been desired.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記問題点に
鑑み、室外熱交換器及び室内熱交換器に備えられた複数
の冷媒流路を流れる冷媒の流速を、冷房運転時、暖房運
転時あるいは除霜運転時に切換えて、冷房成績係数、暖
房成績係数及び除霜効率を向上させた空気調和機を提供
することを目的とする。SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a method for controlling the flow rate of refrigerant flowing through a plurality of refrigerant channels provided in an outdoor heat exchanger and an indoor heat exchanger during cooling operation and heating operation. Alternatively, it is an object of the present invention to provide an air conditioner that is switched at the time of a defrosting operation to improve a cooling coefficient of performance, a heating coefficient of performance, and defrosting efficiency.
【０００５】[0005]
【課題を解決するための手段】本発明は上記課題を解決
するため、圧縮機と、四方弁と、室外熱交換器と、膨張
弁と、室内熱交換器とを順次接続し冷媒回路を構成して
なる空気調和機において、前記室外熱交換器に、上下方
向に３系統の第一冷媒管、第二冷媒管及び第三冷媒管を
設けるとともに、前記第一冷媒管と前記第二冷媒管とを
前記膨張弁側で第一Ｕ字管により接続し、前記第二冷媒
管と前記第三冷媒管とを前記四方弁側で第二Ｕ字管によ
り接続し、前記室内熱交換器に上下方向に３系統の第四
冷媒管、第五冷媒管及び第六冷媒管を設けるとともに、
前記第四冷媒管と前記第五冷媒管とを前記膨張弁側で第
三Ｕ字管により接続し、前記第五冷媒管と前記第六冷媒
管とを前記四方弁側で第四Ｕ字管により接続し、前記第
一冷媒管を前記四方弁に第一配管により接続するととも
に、同第一配管と前記第二Ｕ字管とに第一電磁開閉弁を
備えた第一バイパス管を接続し、前記第三冷媒管を前記
膨張弁に第二配管により接続するとともに、同第二配管
と前記第一Ｕ字管とに第二電磁開閉弁を備えた第二バイ
パス管を接続し、前記第六冷媒管と前記膨張弁とを第三
配管により接続するとともに、同第三配管と前記第三Ｕ
字管とに、前記膨張弁が上流側となる逆止弁を備えた第
三バイパス管を接続し、前記第四冷媒管を前記四方弁に
第四配管により接続するとともに、同第四配管と前記第
四Ｕ字管とに、前記室内熱交換器が上流側となる逆止弁
を備えた第四バイパス管を接続し、冷房運転時、前記四
方弁を、同四方弁から前記室外熱交換器に向けて冷媒が
流れるように切換えるとともに、前記第一電磁開閉弁
と、前記第二電磁開閉弁とを夫々閉じ、前記室外熱交換
器に流入した冷媒が、前記第一冷媒管から前記第二冷媒
管を経て前記第三冷媒管に順次流れ、前記膨張弁から前
記室内熱交換器に流入した冷媒が前記第四冷媒管、前記
第五冷媒管及び前記第六冷媒管を夫々平行して流れるこ
とにより、前記室外熱交換器を流れる冷媒の流速が前記
室内熱交換器を流れる冷媒の流速より大きくなるように
して、前記室外熱交換器での熱交換量を増加させてなる
構成となっている。According to the present invention, a refrigerant circuit is constructed by sequentially connecting a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger. In the air conditioner, the outdoor heat exchanger is provided with three systems of a first refrigerant pipe, a second refrigerant pipe, and a third refrigerant pipe in a vertical direction, and the first refrigerant pipe and the second refrigerant pipe are provided. Are connected by a first U-shaped pipe on the expansion valve side, the second refrigerant pipe and the third refrigerant pipe are connected by a second U-shaped pipe on the four-way valve side, and are vertically connected to the indoor heat exchanger. Along with providing three systems of fourth refrigerant pipe, fifth refrigerant pipe and sixth refrigerant pipe in the direction,
The fourth refrigerant pipe and the fifth refrigerant pipe are connected by a third U-shaped pipe on the expansion valve side, and the fifth refrigerant pipe and the sixth refrigerant pipe are connected by a fourth U-shaped pipe on the four-way valve side. And the first refrigerant pipe is connected to the four-way valve by a first pipe, and the first pipe and the second U-shaped pipe are connected to a first bypass pipe having a first solenoid on-off valve. Connecting the third refrigerant pipe to the expansion valve by a second pipe, connecting a second bypass pipe provided with a second electromagnetic on-off valve to the second pipe and the first U-shaped pipe, Six refrigerant pipes and the expansion valve are connected by a third pipe, and the third pipe and the third U
And a third bypass pipe provided with a check valve in which the expansion valve is on the upstream side, and the fourth refrigerant pipe is connected to the four-way valve by a fourth pipe. The fourth U-shaped pipe is connected to a fourth bypass pipe provided with a check valve in which the indoor heat exchanger is on the upstream side. During cooling operation, the four-way valve is connected to the outdoor heat exchanger through the four-way valve. While switching so that the refrigerant flows toward the device, the first solenoid on-off valve and the second solenoid on-off valve are each closed, and the refrigerant flowing into the outdoor heat exchanger flows from the first refrigerant pipe through the first refrigerant pipe. The refrigerant sequentially flows into the third refrigerant pipe via the two refrigerant pipes, and the refrigerant flowing into the indoor heat exchanger from the expansion valve is parallel to the fourth refrigerant pipe, the fifth refrigerant pipe, and the sixth refrigerant pipe, respectively. By flowing, the flow rate of the refrigerant flowing through the outdoor heat exchanger flows through the indoor heat exchanger. Set to be larger than the flow rate of the coolant, which is to become increasing constituting the heat exchange amount at the outdoor heat exchanger.
【０００６】また、暖房運転時、前記四方弁を、同四方
弁から前記室内熱交換器に向けて冷媒が流れるように切
換えるとともに、前記第一電磁開閉弁と、前記第二電磁
開閉弁とを夫々開放し、前記室内熱交換器に流入した冷
媒が、前記第四冷媒管から前記第五冷媒管を経て前記第
六冷媒管に順次流れ、前記膨張弁から前記室外熱交換器
に流入した冷媒が前記第一冷媒管、前記第二冷媒管及び
前記第三冷媒管を夫々平行して流れることにより、前記
室内熱交換器での熱交換量を増加させてなる構成となっ
ている。In the heating operation, the four-way valve is switched so that the refrigerant flows from the four-way valve toward the indoor heat exchanger, and the first electromagnetic on-off valve and the second electromagnetic on-off valve are switched. Each of the refrigerants opened and the refrigerant flowing into the indoor heat exchanger flows sequentially from the fourth refrigerant pipe through the fifth refrigerant pipe to the sixth refrigerant pipe, and flows from the expansion valve into the outdoor heat exchanger. Flows in parallel through the first refrigerant pipe, the second refrigerant pipe, and the third refrigerant pipe, thereby increasing the amount of heat exchange in the indoor heat exchanger.
【０００７】更に、除霜運転時、前記四方弁を、同四方
弁から前記室外熱交換器に向けて冷媒が流れるように切
換えるとともに、前記第一電磁開閉弁と、前記第二電磁
開閉弁とを夫々開放し、前記室外熱交換器に流入した冷
媒が、前記第一冷媒管、前記第二冷媒管及び前記第三冷
媒管を夫々平行して流れ、前記膨張弁から前記室内熱交
換器に流入した冷媒が前記第四冷媒管、前記第五冷媒管
及び前記第六冷媒管を夫々平行して流れる構成となって
いる。Further, during the defrosting operation, the four-way valve is switched so that the refrigerant flows from the four-way valve toward the outdoor heat exchanger, and the first electromagnetic on-off valve and the second electromagnetic on-off valve are switched. Respectively, the refrigerant flowing into the outdoor heat exchanger flows in parallel through the first refrigerant pipe, the second refrigerant pipe, and the third refrigerant pipe, respectively, from the expansion valve to the indoor heat exchanger. The inflowing refrigerant flows in the fourth refrigerant pipe, the fifth refrigerant pipe, and the sixth refrigerant pipe in parallel.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施の形態を、添
付図面に基づいた実施例として詳細に説明する。図１は
本発明による空気調和機の冷媒回路図であり、図２
（Ａ）は冷房運転時の冷媒の流れを示す冷媒回路図であ
り、図２（Ｂ）は暖房運転時の冷媒の流れを示す冷媒回
路図である。また、図３（Ａ）は除霜運転時の冷媒の流
れを示す冷媒回路図であり、図３（Ｂ）は夫々の運転時
における電磁開閉弁の開閉状態を示す図である。本発明
による空気調和機は、図１で示すように、圧縮機１と、
四方弁２と、室外熱交換器４と、膨張弁５と、室内熱交
換器６とアキュームレータ３とを順次接続して冷媒回路
を構成し、前記室外熱交換器４に上下方向に３系統の第
一冷媒管４ａ、第二冷媒管４ｂ及び第三冷媒管４ｃを設
けるとともに、前記第一冷媒管４ａと前記第二冷媒管４
ｂとを前記膨張弁５側で第一Ｕ字管４ｄにより接続し、
前記第二冷媒管４ｂと前記第三冷媒管４ｃとを前記四方
弁２側で第二Ｕ字管４ｅにより接続している。また、前
記室内熱交換器６に上下方向に３系統の第四冷媒管６
ａ、第五冷媒管６ｂ及び第六冷媒管６ｃを設けるととも
に、前記第四冷媒管６ａと前記第五冷媒管６ｂとを前記
膨張弁５側で第三Ｕ字管６ｄにより接続し、前記第五冷
媒管６ｂと前記第六冷媒管６ｃとを前記四方弁２側で第
四Ｕ字管６ｅにより接続している。Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a refrigerant circuit diagram of an air conditioner according to the present invention, and FIG.
FIG. 2A is a refrigerant circuit diagram illustrating a flow of a refrigerant during a cooling operation, and FIG. 2B is a refrigerant circuit diagram illustrating a flow of a refrigerant during a heating operation. FIG. 3A is a refrigerant circuit diagram showing the flow of the refrigerant during the defrosting operation, and FIG. 3B is a diagram showing the open / closed state of the electromagnetic on-off valve during each operation. The air conditioner according to the present invention includes a compressor 1 as shown in FIG.
The four-way valve 2, the outdoor heat exchanger 4, the expansion valve 5, the indoor heat exchanger 6, and the accumulator 3 are sequentially connected to form a refrigerant circuit, and the outdoor heat exchanger 4 is vertically connected to three systems. A first refrigerant pipe 4a, a second refrigerant pipe 4b, and a third refrigerant pipe 4c are provided, and the first refrigerant pipe 4a and the second refrigerant pipe 4c are provided.
b on the expansion valve 5 side by a first U-shaped pipe 4d,
The second refrigerant pipe 4b and the third refrigerant pipe 4c are connected by a second U-shaped pipe 4e on the four-way valve 2 side. Further, the indoor heat exchanger 6 is provided with three fourth refrigerant pipes 6 in the vertical direction.
a, a fifth refrigerant pipe 6b and a sixth refrigerant pipe 6c are provided, and the fourth refrigerant pipe 6a and the fifth refrigerant pipe 6b are connected by a third U-shaped pipe 6d on the expansion valve 5 side. The fifth refrigerant pipe 6b and the sixth refrigerant pipe 6c are connected by a fourth U-shaped pipe 6e on the four-way valve 2 side.
【０００９】前記四方弁３と前記室外熱交換器４の前記
第一冷媒管４ａとは第一配管１１により接続され、同第
一配管１１と、前記第二Ｕ字管４ｅとには第一電磁開閉
弁７を備えた第一バイパス管１２が接続され、前記膨張
弁５と前記第三冷媒管４ｃとは第二配管１３により接続
され、同第二配管１３と前記第一Ｕ字管４ｄとには第二
電磁開閉弁８を備えた第二バイパス管１４が接続されて
いる。前記膨張弁５と前記室内熱交換器６の前記第六冷
媒管６ｃは第三配管１５により接続され、同第三配管１
５と前記第三Ｕ字管６ｄとには、前記膨張弁５が上流側
となる逆止弁１０を備えた第三バイパス管１６が接続さ
れ、前記四方弁２と前記室内熱交換器６の前記第四冷媒
管６ａとは第四配管１７により接続され、同第四配管１
７と前記第四Ｕ字管６ｅとには、前記室内熱交換器６が
上流側となる逆止弁９を備えた第四バイパス管１８が接
続されている。The four-way valve 3 and the first refrigerant pipe 4a of the outdoor heat exchanger 4 are connected by a first pipe 11, and the first pipe 11 and the second U-shaped pipe 4e have a first pipe. A first bypass pipe 12 having an electromagnetic on-off valve 7 is connected, the expansion valve 5 and the third refrigerant pipe 4c are connected by a second pipe 13, and the second pipe 13 and the first U-shaped pipe 4d. Is connected to a second bypass pipe 14 having a second electromagnetic on-off valve 8. The expansion valve 5 and the sixth refrigerant pipe 6 c of the indoor heat exchanger 6 are connected by a third pipe 15.
5 and the third U-shaped pipe 6d, a third bypass pipe 16 provided with a check valve 10 in which the expansion valve 5 is on the upstream side is connected, and the four-way valve 2 and the indoor heat exchanger 6 are connected to each other. The fourth refrigerant pipe 6a is connected to the fourth refrigerant pipe 6a by a fourth pipe 17,
A fourth bypass pipe 18 having a check valve 9 in which the indoor heat exchanger 6 is on the upstream side is connected to 7 and the fourth U-shaped pipe 6e.
【００１０】次に、冷房運転時の冷媒の流れについて説
明をする。冷房運転時、図３（Ｂ）で示すように前記第
一電磁開閉弁７と前記第二電磁開閉弁８とは閉じられ
る。前記圧縮機１から吐出された冷媒は、図２（Ａ）で
示すように、前記四方弁２を介し、前記配管１１を通り
前記第一バイパス管１２に流入するが、前記第一電磁開
閉弁７が閉じられているため流れが遮断される。前記第
一配管１１から前記第一冷媒管４ａに流入した冷媒は、
前記第二電磁開閉弁８が閉じられているため、前記第一
Ｕ字管４ｄを介して前記第二冷媒管４ｂに流入し、前記
第一電磁開閉弁７が閉じられているため、前記第二Ｕ字
管４ｅを介して前記第三冷媒管４ｃに流入し、これらで
熱を放出して凝縮する。凝縮した冷媒は続いて第二配管
１３を通り前記膨張弁５により減圧され低圧となり、前
記三配管１５と、前記第三バイパス管１６とから前記第
四冷媒管６ａ、前記第五冷媒管６ｂ及び前記第六冷媒管
６ｃとに夫々流入し、これらを平行して流れ、前記第四
バイパス管１８と前記第四配管１７とを通り、前記四方
弁２を介して前記圧縮機１に還流する。Next, the flow of the refrigerant during the cooling operation will be described. During the cooling operation, the first solenoid on-off valve 7 and the second solenoid on-off valve 8 are closed as shown in FIG. The refrigerant discharged from the compressor 1 flows into the first bypass pipe 12 through the pipe 11 through the four-way valve 2 as shown in FIG. The flow is interrupted because 7 is closed. The refrigerant flowing into the first refrigerant pipe 4a from the first pipe 11 is
Since the second solenoid on-off valve 8 is closed, it flows into the second refrigerant pipe 4b via the first U-shaped pipe 4d, and the first solenoid on-off valve 7 is closed. The refrigerant flows into the third refrigerant pipe 4c via the two U-shaped pipes 4e, and releases heat and condenses them. The condensed refrigerant subsequently passes through the second pipe 13 and is reduced in pressure by the expansion valve 5 to a low pressure. From the three pipes 15 and the third bypass pipe 16, the fourth refrigerant pipe 6a, the fifth refrigerant pipe 6b and The refrigerant flows into the sixth refrigerant pipe 6c, respectively, flows in parallel, flows through the fourth bypass pipe 18 and the fourth pipe 17, and returns to the compressor 1 via the four-way valve 2.
【００１１】上記したように冷房運転時、前記室外熱交
換器４において、冷媒は前記第一冷媒管４ａから前記第
二冷媒管４ｂを経て前記第三冷媒管４ｃまで管路の長い
伝熱管内を流れることにより流速が増加し、これにより
前記室外熱交換器４での熱伝達率が向上する。また、前
記室内熱交換器６では、冷媒は前記第四冷媒管６ａ、前
記第五冷媒管６ｂ及び前記第六冷媒管６ｃを平行して流
れることにより流速が低下し、圧力損失が小さくなるこ
とから熱伝達率が向上するようになっている。As described above, during the cooling operation, in the outdoor heat exchanger 4, refrigerant flows from the first refrigerant pipe 4a through the second refrigerant pipe 4b to the third refrigerant pipe 4c in a long heat transfer pipe. , The flow velocity increases, thereby improving the heat transfer coefficient in the outdoor heat exchanger 4. Further, in the indoor heat exchanger 6, the refrigerant flows in parallel through the fourth refrigerant pipe 6a, the fifth refrigerant pipe 6b, and the sixth refrigerant pipe 6c, so that the flow velocity is reduced and the pressure loss is reduced. The heat transfer coefficient is improved.
【００１２】次に、暖房運転時の冷媒の流れについて説
明をする。暖房運転時、図３（Ｂ）で示すように前記第
一電磁開閉弁７と前記第二電磁開閉弁８とは開けられ
る。前記圧縮機１から吐出された冷媒は、図２（Ｂ）で
示すように、前記四方弁２を介し、前記第四配管１７を
通り前記室内熱交換器６の第四冷媒管６ａに流入する。
前記第四バイパス管１８に流入した冷媒は前記逆止弁９
により流れが遮断される。前記第四冷媒管６ａに流入し
た冷媒は、前記第五冷媒管６ｂと前記第六冷媒管６ｃと
を通り、前記第三配管１５から前記膨張弁５に流入し減
圧され、続いて前記第二配管１３と、前記第二バイパス
管１４とに分岐して前記室外熱交換器４の前記第一冷媒
管４ａ、前記第二冷媒管４ｂ及び前記第三冷媒管４ｃに
夫々流入する。これらで熱交換した冷媒は前記第一配管
１１と前記第一バイパス管１２とを通り、前記四方弁２
を介して前記圧縮機１に還流する。Next, the flow of the refrigerant during the heating operation will be described. During the heating operation, the first solenoid on-off valve 7 and the second solenoid on-off valve 8 are opened as shown in FIG. The refrigerant discharged from the compressor 1 flows into the fourth refrigerant pipe 6a of the indoor heat exchanger 6 through the fourth pipe 17 via the four-way valve 2 as shown in FIG. 2 (B). .
The refrigerant flowing into the fourth bypass pipe 18 is supplied to the check valve 9.
Blocks the flow. The refrigerant flowing into the fourth refrigerant pipe 6a passes through the fifth refrigerant pipe 6b and the sixth refrigerant pipe 6c, flows into the expansion valve 5 from the third pipe 15, and is decompressed. It branches into a pipe 13 and the second bypass pipe 14 and flows into the first refrigerant pipe 4a, the second refrigerant pipe 4b, and the third refrigerant pipe 4c of the outdoor heat exchanger 4, respectively. The refrigerant that has exchanged heat therethrough passes through the first pipe 11 and the first bypass pipe 12 and passes through the four-way valve 2.
To the compressor 1 through the compressor.
【００１３】上記したように暖房運転時、前記室内熱交
換器６において、冷媒は前記第四冷媒管６ａから前記第
五冷媒管６ｂを経て前記第六冷媒管６ｃまで管路の長い
伝熱管内を流れることにより流速が増加し、これにより
前記室内熱交換器６での熱伝達率が向上する。また、前
記室外熱交換器４では、冷媒は前記第一冷媒管４ａ、前
記第二冷媒管４ｂ及び前記第三冷媒管４ｃを平行して流
れることにより流速が低下し、圧力損失が小さくなるこ
とから熱伝達率が向上するようになっている。As described above, during the heating operation, in the indoor heat exchanger 6, refrigerant flows from the fourth refrigerant pipe 6a through the fifth refrigerant pipe 6b to the sixth refrigerant pipe 6c in a long heat transfer pipe. , The flow velocity increases, and thereby the heat transfer coefficient in the indoor heat exchanger 6 improves. In the outdoor heat exchanger 4, the refrigerant flows in the first refrigerant pipe 4a, the second refrigerant pipe 4b, and the third refrigerant pipe 4c in parallel, so that the flow velocity is reduced, and the pressure loss is reduced. The heat transfer coefficient is improved.
【００１４】冬場に暖房運転を行なう際、前記室外熱交
換器４に霜が付着している際は暖房運転の前に除霜運転
を行う必要がある。次に、除霜運転時の冷媒の流れにつ
いて説明をする。除霜運転時、図３（Ｂ）で示すように
前記第一電磁開閉弁７と前記第二電磁開閉弁８とは開け
られる。前記圧縮機１から吐出された冷媒は、図３
（Ａ）で示すように、前記四方弁２を介し、前記室外熱
交換器４の前記第一冷媒管４ａ、前記第二冷媒管４ｂ及
び前記第三冷媒管４ｃに夫々流入し、熱を放出して前記
室外熱交換器４の除霜を行う。熱を放出した冷媒は前記
膨張弁５を介して前記前記第三配管１５から前記室内熱
交換器６の前記第四冷媒管６ａ、前記第五冷媒管６ｂ及
び前記第六冷媒管６ｃに夫々流入し、前記四方弁２を介
して前記圧縮機１に還流する。When performing the heating operation in winter, if frost adheres to the outdoor heat exchanger 4, it is necessary to perform the defrosting operation before the heating operation. Next, the flow of the refrigerant during the defrosting operation will be described. During the defrosting operation, the first solenoid on-off valve 7 and the second solenoid on-off valve 8 are opened as shown in FIG. The refrigerant discharged from the compressor 1 is shown in FIG.
As shown in (A), the heat flows into the first refrigerant pipe 4a, the second refrigerant pipe 4b, and the third refrigerant pipe 4c of the outdoor heat exchanger 4 via the four-way valve 2 to release heat. Then, the outdoor heat exchanger 4 is defrosted. The refrigerant that has released the heat flows from the third pipe 15 through the expansion valve 5 into the fourth refrigerant pipe 6a, the fifth refrigerant pipe 6b, and the sixth refrigerant pipe 6c of the indoor heat exchanger 6, respectively. Then, the refrigerant is returned to the compressor 1 through the four-way valve 2.
【００１５】上記したように除霜運転時、前記圧縮機１
から吐出された高温高圧の冷媒が、前記室外熱交換器４
の前記第一冷媒管４ａ、前記第二冷媒管４ｂ及び前記第
三冷媒管４ｃを平行して流れ、熱を放出することにより
除霜運転の効率が向上するようになっている。As described above, during the defrosting operation, the compressor 1
High-temperature and high-pressure refrigerant discharged from the outdoor heat exchanger 4
The first refrigerant pipe 4a, the second refrigerant pipe 4b, and the third refrigerant pipe 4c flow in parallel to release heat, thereby improving the efficiency of the defrosting operation.
【００１６】[0016]
【発明の効果】以上説明したように、本発明によると、
室外熱交換器と室内熱交換器とに夫々３系統の冷媒流路
を設けるとともに、前記室外熱交換器の両側に接続され
たバイパス管に夫々電磁開閉弁を設け、前記室内熱交換
器の両側に接続されたバイパス管に夫々逆止弁を設け、
冷媒運転時、前記室外熱交換器において冷媒の流速を増
加させ、前記室内熱交換器において冷媒の流速を低下さ
せることにより熱伝達率を向上させ、暖房運転時、前記
室内熱交換器において冷媒の流速を増加させ、前記室外
熱交換器において冷媒の流速を低下させることにより熱
伝達率を向上させて、冷暖房運転または除霜運転の効率
が改善された空気調和機とすることができる。As described above, according to the present invention,
The outdoor heat exchanger and the indoor heat exchanger are each provided with three refrigerant flow paths, and electromagnetic valves are provided on bypass pipes connected to both sides of the outdoor heat exchanger, respectively. Check valves are provided in the bypass pipes connected to the
During the refrigerant operation, the flow rate of the refrigerant is increased in the outdoor heat exchanger, and the heat transfer rate is improved by decreasing the flow rate of the refrigerant in the indoor heat exchanger. By increasing the flow rate and decreasing the flow rate of the refrigerant in the outdoor heat exchanger, the heat transfer rate is improved, and an air conditioner with improved efficiency of the cooling / heating operation or the defrosting operation can be obtained.
【図１】本発明による空気調和機の冷媒回路図である。FIG. 1 is a refrigerant circuit diagram of an air conditioner according to the present invention.
【図２】（Ａ）は本発明による空気調和機の冷媒運転時
の冷媒の流れを示す冷媒回路図である。（Ｂ）は本発明
による空気調和機の暖房運転時の冷媒の流れを示す冷媒
回路図である。FIG. 2A is a refrigerant circuit diagram showing a flow of a refrigerant during a refrigerant operation of the air conditioner according to the present invention. (B) is a refrigerant circuit diagram showing a refrigerant flow during a heating operation of the air conditioner according to the present invention.
【図３】（Ａ）は本発明による空気調和機の除霜運転時
の冷媒の流れを示す冷媒回路図である。（Ｂ）は本発明
による空気調和機の冷媒回路に設けられた電磁開閉弁の
開閉状態を示す図である。FIG. 3A is a refrigerant circuit diagram showing a refrigerant flow during a defrosting operation of the air conditioner according to the present invention. (B) is a figure which shows the opening / closing state of the solenoid on-off valve provided in the refrigerant circuit of the air conditioner by this invention.
【図４】従来例による空気調和機の冷媒回路図である。FIG. 4 is a refrigerant circuit diagram of an air conditioner according to a conventional example.
１ 圧縮機 ２ 四方弁 ３ アキュームレータ ４ 室外熱交換器 ４ａ 第一冷媒管 ４ｂ 第二冷媒管 ４ｃ 第三冷媒管 ４ｄ 第一Ｕ字管 ４ｅ 第二Ｕ字管 ５ 膨張弁 ６ 室内熱交換器 ６ａ 第四冷媒管 ６ｂ 第五冷媒管 ６ｃ 第六冷媒管 ６ｄ 第三Ｕ字管 ６ｅ 第四Ｕ字管 ７ 第一電磁開閉弁 ８ 第二電磁開閉弁 ９ 逆止弁 １０ 逆止弁 １１ 第一配管 １２ 第一バイパス管 １３ 第二配管 １４ 第二バイパス管 １５ 第三配管 １６ 第三バイパス管 １７ 第四配管 １８ 第四バイパス管 Reference Signs List 1 compressor 2 four-way valve 3 accumulator 4 outdoor heat exchanger 4a first refrigerant pipe 4b second refrigerant pipe 4c third refrigerant pipe 4d first U-shaped pipe 4e second U-shaped pipe 5 expansion valve 6 indoor heat exchanger 6a Four refrigerant pipe 6b Fifth refrigerant pipe 6c Sixth refrigerant pipe 6d Third U-shaped pipe 6e Fourth U-shaped pipe 7 First electromagnetic on-off valve 8 Second electromagnetic on-off valve 9 Check valve 10 Check valve 11 First pipe 12 First bypass pipe 13 Second pipe 14 Second bypass pipe 15 Third pipe 16 Third bypass pipe 17 Fourth pipe 18 Fourth bypass pipe
Claims (3)
膨張弁と、室内熱交換器とを順次接続し冷媒回路を構成
してなる空気調和機において、 前記室外熱交換器に、上下方向に３系統の第一冷媒管、
第二冷媒管及び第三冷媒管を設けるとともに、前記第一
冷媒管と前記第二冷媒管とを前記膨張弁側で第一Ｕ字管
により接続し、前記第二冷媒管と前記第三冷媒管とを前
記四方弁側で第二Ｕ字管により接続し、前記室内熱交換
器に上下方向に３系統の第四冷媒管、第五冷媒管及び第
六冷媒管を設けるとともに、前記第四冷媒管と前記第五
冷媒管とを前記膨張弁側で第三Ｕ字管により接続し、前
記第五冷媒管と前記第六冷媒管とを前記四方弁側で第四
Ｕ字管により接続し、 前記第一冷媒管を前記四方弁に第一配管により接続する
とともに、同第一配管と前記第二Ｕ字管とに第一電磁開
閉弁を備えた第一バイパス管を接続し、前記第三冷媒管
を前記膨張弁に第二配管により接続するとともに、同第
二配管と前記第一Ｕ字管とに第二電磁開閉弁を備えた第
二バイパス管を接続し、前記第六冷媒管と前記膨張弁と
を第三配管により接続するとともに、同第三配管と前記
第三Ｕ字管とに、前記膨張弁が上流側となる逆止弁を備
えた第三バイパス管を接続し、前記第四冷媒管を前記四
方弁に第四配管により接続するとともに、同第四配管と
前記第四Ｕ字管とに、前記室内熱交換器が上流側となる
逆止弁を備えた第四バイパス管を接続し、 冷房運転時、前記四方弁を、同四方弁から前記室外熱交
換器に向けて冷媒が流れるように切換えるとともに、前
記第一電磁開閉弁と、前記第二電磁開閉弁とを夫々閉
じ、前記室外熱交換器に流入した冷媒が、前記第一冷媒
管から前記第二冷媒管を経て前記第三冷媒管に順次流
れ、前記膨張弁から前記室内熱交換器に流入した冷媒が
前記第四冷媒管、前記第五冷媒管及び前記第六冷媒管を
夫々平行して流れることにより、前記室外熱交換器を流
れる冷媒の流速が前記室内熱交換器を流れる冷媒の流速
より大きくなるようにして、前記室外熱交換器での熱交
換量を増加させてなることを特徴とする空気調和機。1. A compressor, a four-way valve, an outdoor heat exchanger,
In an air conditioner configured by sequentially connecting an expansion valve and an indoor heat exchanger to form a refrigerant circuit, the outdoor heat exchanger has three first refrigerant pipes in a vertical direction;
A second refrigerant pipe and a third refrigerant pipe are provided, the first refrigerant pipe and the second refrigerant pipe are connected by a first U-shaped pipe on the expansion valve side, and the second refrigerant pipe and the third refrigerant pipe are connected. A pipe is connected to the four-way valve side by a second U-shaped pipe, and the indoor heat exchanger is provided with three systems of a fourth refrigerant pipe, a fifth refrigerant pipe, and a sixth refrigerant pipe in a vertical direction, and A refrigerant pipe and the fifth refrigerant pipe are connected by a third U-shaped pipe on the expansion valve side, and the fifth refrigerant pipe and the sixth refrigerant pipe are connected by a fourth U-shaped pipe on the four-way valve side. Connecting the first refrigerant pipe to the four-way valve by a first pipe, connecting a first bypass pipe provided with a first electromagnetic on-off valve to the first pipe and the second U-shaped pipe, The three refrigerant pipes are connected to the expansion valve by a second pipe, and the second pipe and the first U-shaped pipe are provided with a second solenoid valve. The second bypass pipe is connected, and the sixth refrigerant pipe and the expansion valve are connected by a third pipe, and the third pipe and the third U-shaped pipe have the expansion valve on the upstream side. A third bypass pipe having a check valve is connected, the fourth refrigerant pipe is connected to the four-way valve by a fourth pipe, and the indoor heat exchange is performed between the fourth pipe and the fourth U-shaped pipe. A fourth bypass pipe provided with a check valve on the upstream side of the vessel is connected, and during the cooling operation, the four-way valve is switched so that the refrigerant flows from the four-way valve toward the outdoor heat exchanger. The first solenoid on-off valve and the second solenoid on-off valve are each closed, and the refrigerant flowing into the outdoor heat exchanger flows sequentially from the first refrigerant pipe through the second refrigerant pipe to the third refrigerant pipe. The refrigerant flowing from the expansion valve into the indoor heat exchanger is the fourth refrigerant pipe and the fifth refrigerant. By flowing the pipe and the sixth refrigerant pipe in parallel, the flow rate of the refrigerant flowing through the outdoor heat exchanger is larger than the flow rate of the refrigerant flowing through the indoor heat exchanger. An air conditioner characterized by increasing the amount of heat exchange.
ら前記室内熱交換器に向けて冷媒が流れるように切換え
るとともに、前記第一電磁開閉弁と、前記第二電磁開閉
弁とを夫々開放し、前記室内熱交換器に流入した冷媒
が、前記第四冷媒管から前記第五冷媒管を経て前記第六
冷媒管に順次流れ、前記膨張弁から前記室外熱交換器に
流入した冷媒が前記第一冷媒管、前記第二冷媒管及び前
記第三冷媒管を夫々平行して流れることにより、前記室
内熱交換器での熱交換量を増加させてなることを特徴と
する請求項１に記載の空気調和機。2. During a heating operation, the four-way valve is switched so that refrigerant flows from the four-way valve toward the indoor heat exchanger, and the first electromagnetic on-off valve and the second electromagnetic on-off valve are connected to each other. Each of the refrigerants opened and the refrigerant flowing into the indoor heat exchanger flows sequentially from the fourth refrigerant pipe through the fifth refrigerant pipe to the sixth refrigerant pipe, and flows from the expansion valve into the outdoor heat exchanger. Flowing in parallel through the first refrigerant pipe, the second refrigerant pipe, and the third refrigerant pipe, thereby increasing an amount of heat exchange in the indoor heat exchanger. The air conditioner according to item 1.
ら前記室外熱交換器に向けて冷媒が流れるように切換え
るとともに、前記第一電磁開閉弁と、前記第二電磁開閉
弁とを夫々開放し、前記室外熱交換器に流入した冷媒
が、前記第一冷媒管、前記第二冷媒管及び前記第三冷媒
管を夫々平行して流れ、前記膨張弁から前記室内熱交換
器に流入した冷媒が前記第四冷媒管、前記第五冷媒管及
び前記第六冷媒管を夫々平行して流れることを特徴とし
てなる請求項１に記載の空気調和機。3. During the defrosting operation, the four-way valve is switched so that refrigerant flows from the four-way valve toward the outdoor heat exchanger, and the first electromagnetic on-off valve and the second electromagnetic on-off valve Respectively, the refrigerant flowing into the outdoor heat exchanger flows in parallel through the first refrigerant pipe, the second refrigerant pipe, and the third refrigerant pipe, respectively, from the expansion valve to the indoor heat exchanger. The air conditioner according to claim 1, wherein the inflowing refrigerant flows in parallel through the fourth refrigerant pipe, the fifth refrigerant pipe, and the sixth refrigerant pipe, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001042764A JP2002243296A (en) | 2001-02-20 | 2001-02-20 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001042764A JP2002243296A (en) | 2001-02-20 | 2001-02-20 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002243296A true JP2002243296A (en) | 2002-08-28 |
Family
ID=18905019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001042764A Pending JP2002243296A (en) | 2001-02-20 | 2001-02-20 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002243296A (en) |
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| WO2012147336A1 (en) * | 2011-04-25 | 2012-11-01 | パナソニック株式会社 | Refrigeration cycle device |
| JP2012237543A (en) * | 2011-04-25 | 2012-12-06 | Panasonic Corp | Freezing cycle device |
| CN104819590A (en) * | 2014-02-03 | 2015-08-05 | 东普雷股份有限公司 | Refrigeration device and operation method of refrigeration device |
| TWI709723B (en) * | 2014-02-03 | 2020-11-11 | 日商東普雷股份有限公司 | Refrigeration device and operation method of refrigeration device |
| KR101566747B1 (en) | 2014-04-14 | 2015-11-13 | 현대자동차 주식회사 | Heat pump system for vehicle |
| US10254019B2 (en) | 2014-04-14 | 2019-04-09 | Hyundai Motor Company | Heat pump system in vehicle |
| WO2018055740A1 (en) * | 2016-09-23 | 2018-03-29 | 三菱電機株式会社 | Heat exchanger and refrigeration cycle device |
| JPWO2018055740A1 (en) * | 2016-09-23 | 2019-06-24 | 三菱電機株式会社 | Heat exchanger and refrigeration cycle device |
| EP3517855A4 (en) * | 2016-09-23 | 2019-10-09 | Mitsubishi Electric Corporation | Heat exchanger and refrigeration cycle device |
| WO2019007558A1 (en) * | 2017-07-03 | 2019-01-10 | Audi Ag | Refrigeration system for a vehicle, comprising a refrigerant circuit having a heat exchanger, and heat exchanger for such a refrigeration system |
| US11364770B2 (en) | 2017-07-03 | 2022-06-21 | Audi Ag | Refrigeration system for a vehicle, comprising a refrigerant circuit having a heat exchanger, and heat exchanger for such a refrigeration system |
| WO2020143538A1 (en) * | 2019-01-10 | 2020-07-16 | 青岛海尔空调器有限总公司 | Heat exchanger and air conditioner |
| WO2020143540A1 (en) * | 2019-01-10 | 2020-07-16 | 青岛海尔空调器有限总公司 | Heat exchanger and air conditioner |
| WO2021106079A1 (en) * | 2019-11-26 | 2021-06-03 | 三菱電機株式会社 | Refrigeration apparatus |
| JPWO2021106079A1 (en) * | 2019-11-26 | 2021-06-03 | ||
| JP7150198B2 (en) | 2019-11-26 | 2022-10-07 | 三菱電機株式会社 | refrigeration equipment |
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