JP3480217B2 - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP3480217B2 JP3480217B2 JP00719397A JP719397A JP3480217B2 JP 3480217 B2 JP3480217 B2 JP 3480217B2 JP 00719397 A JP00719397 A JP 00719397A JP 719397 A JP719397 A JP 719397A JP 3480217 B2 JP3480217 B2 JP 3480217B2
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- valve
- outdoor heat
- air conditioner
- heat transfer
- 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]
【発明の属する技術分野】本発明は空気調和機に係わ
り、詳しくは、室外熱交換器の除霜時間の短縮を図るた
めの配管接続構成に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to a pipe connection structure for shortening the defrosting time of an outdoor heat exchanger.
【０００２】[0002]
【従来の技術】空気調和機には図１に示すように、圧縮
機１と、四方弁２と、室外熱交換器３と、減圧装置４
と、室内熱交換器５とを順次配管接続してなる冷媒回路
があり、暖房運転時に圧縮機１より吐出した高温高圧の
冷媒ガスは実線矢印で示すように四方弁２を通して室内
熱交換器５に送られ、室内空気との熱交換の後、減圧装
置４により減圧液化され、室外熱交換器３で室外空気と
の熱交換によりガス化され、再度四方弁２を通して圧縮
機１の吸入側に戻るようになっている。また、冷房運転
時および室外熱交換器３の結氷を防止する除霜運転時に
は四方弁２が切換えられることにより、破線矢印で示す
ように冷媒の流れが変わり、室外熱交換器３と室内熱交
換器５の作用が逆になる。なお、除霜運転では高温高圧
の冷媒ガスが室外熱交換器３に流入することになるが、
この室外熱交換器３に流入した冷媒は室外空気との熱交
換により熱を奪われ、温度が低下するため、冷媒の流れ
が下流になる出口側の霜取りに時間がかかることにな
る。そこで、この除霜時間の短縮を図る手段として、圧
縮機１の吐出側と室外熱交換器３の中間部3a、3bとの間
に開閉弁６を具えたバイパス回路を設け、圧縮機１から
吐出する高温高圧の冷媒ガスの一部を室外熱交換器３の
中間部3a、3bに供給するようになっている。2. Description of the Related Art As shown in FIG. 1, an air conditioner includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, and a pressure reducing device 4.
And the indoor heat exchanger 5 are sequentially connected by piping, and the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 during the heating operation is passed through the four-way valve 2 as shown by the solid arrow to show the indoor heat exchanger 5 To the suction side of the compressor 1 through the four-way valve 2 again after being heat-exchanged with the room air and liquefied under reduced pressure by the decompression device 4 and gasified by heat exchange with the outdoor air in the outdoor heat exchanger 3. I'm supposed to come back. In addition, during the cooling operation and during the defrosting operation for preventing the formation of ice in the outdoor heat exchanger 3, the four-way valve 2 is switched, so that the flow of the refrigerant changes as indicated by the broken line arrow, and the outdoor heat exchanger 3 and the indoor heat exchanger are exchanged. The operation of the container 5 is reversed. In the defrosting operation, high-temperature and high-pressure refrigerant gas will flow into the outdoor heat exchanger 3,
The refrigerant that has flowed into the outdoor heat exchanger 3 is deprived of heat due to heat exchange with the outdoor air, and the temperature decreases, so it takes time to defrost the outlet side where the refrigerant flows downstream. Therefore, as a means for shortening the defrosting time, a bypass circuit having an on-off valve 6 is provided between the discharge side of the compressor 1 and the intermediate portions 3a, 3b of the outdoor heat exchanger 3 so that the compressor 1 A part of the discharged high-temperature and high-pressure refrigerant gas is supplied to the intermediate portions 3a and 3b of the outdoor heat exchanger 3.
【０００３】図４は室外熱交換器３の配管接続例を示し
たもので、この室外熱交換器３は図１に示す送風ファン
７の運転に伴って発生する空気流に対し前後二列に構成
され、かつ、後列側の伝熱管の上端と下端が前列側のそ
れよりも高位置にあり、これら前列と後列の伝熱管の上
端同士および下端同士をそれぞれ結合する上下二つの結
合部を室外熱交換器３の中間部3a、3bとし、同中間部3
a、3bと圧縮機１の吐出側との間に上述の開閉弁６を具
えたバイパス回路を設け、除霜運転時に開閉弁６を開放
し、圧縮機１より吐出した高温高圧の冷媒ガスの一部を
室外熱交換器３の伝熱管の中間部3a、3bにバイパスさせ
ることにより、室外側熱交換器３の中間部3a、3bから出
口側（減圧装置４側）にかけての下流側に高温の冷媒ガ
スを流し、これにより下流側の除霜の遅れを無くし、室
外熱交換器３全体の除霜時間を短縮するようになってい
る。FIG. 4 shows an example of piping connection of the outdoor heat exchanger 3. The outdoor heat exchanger 3 is arranged in two rows in front and rear with respect to the air flow generated by the operation of the blower fan 7 shown in FIG. The upper and lower ends of the heat transfer tubes on the rear row side are located higher than those on the front row side, and the upper and lower two connecting portions that connect the upper and lower ends of the heat transfer tubes on the front row and the rear row, respectively, to the outside. Intermediate portions 3a and 3b of the heat exchanger 3 are used.
A bypass circuit having the above-mentioned on-off valve 6 is provided between a and 3b and the discharge side of the compressor 1, and the on-off valve 6 is opened during the defrosting operation so that the high-temperature high-pressure refrigerant gas discharged from the compressor 1 is discharged. By bypassing a part of the heat transfer tubes of the outdoor heat exchanger 3 into the intermediate portions 3a and 3b, high temperature is obtained in the downstream side from the intermediate portions 3a and 3b of the outdoor heat exchanger 3 to the outlet side (pressure reducing device 4 side). The refrigerant gas is flowed to eliminate the delay of defrosting on the downstream side, and the defrosting time of the entire outdoor heat exchanger 3 is shortened.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
室外熱交換器３では、その中間部3a、3bとバイパス回路
の出口側との配管接続に図４に示すような略Ｙ字状に形
成された分岐管10を横向きに用いているため、冷房運転
等を行う場合の冷媒の流れが不自然であるとともに、除
霜運転時においては、バイパス回路からの冷媒と室外熱
交換器３の後列側の伝熱管を通過した冷媒との合流が不
自然となり、バイパス回路からの冷媒供給量が少なくな
る要因になっている。したがって、本発明においては、
これらの問題点を解消した空気調和機を提供することを
目的としている。However, in the conventional outdoor heat exchanger 3, the pipe connection between the intermediate portions 3a and 3b and the outlet side of the bypass circuit is formed in a substantially Y shape as shown in FIG. Since the branched pipe 10 is used horizontally, the flow of the refrigerant is unnatural when performing the cooling operation and the like, and the refrigerant from the bypass circuit and the rear row side of the outdoor heat exchanger 3 are operated during the defrosting operation. The merging with the refrigerant that has passed through the heat transfer tube becomes unnatural, which is a factor that reduces the amount of refrigerant supplied from the bypass circuit. Therefore, in the present invention,
The object is to provide an air conditioner that solves these problems.
【０００５】[0005]
【課題を解決するための手段】本発明は上記の課題を解
決するためになされたもので、圧縮機と、四方弁と、室
外熱交換器と、減圧装置と、室内熱交換器とを順次配管
接続してなり、前記室外熱交換器の伝熱管が室外ファン
の回転に伴って発生する空気流に対し前後二列に構成さ
れ、かつ、後列側の伝熱管の上端と下端が前列側のそれ
よりも高位置にあり、これら前列と後列の伝熱管の上端
同士および下端同士をそれぞれ結合する上下二つの結合
部を前記室外熱交換器の中間部とし、この二つの中間部
と前記圧縮機の吐出側との間に開閉弁を具えたバイパス
回路を設け、除霜運転時に、前記開閉弁を開放し、前記
圧縮機の吐出冷媒ガスの一部を前記二つの中間部に供給
し、後列中段の入口側より上下に分流させた冷媒ガスと
共に前列中段の出口側へ流通させるようにしてなる空気
調和機において、前記バイパス回路の出口側と前記室外
熱交換器の上下二つの中間部との接続口を後列側の伝熱
管の上下両端よりそれぞれ上方に設けた構成とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a compressor, a four-way valve, an outdoor heat exchanger, a pressure reducing device, and an indoor heat exchanger are sequentially arranged. The heat transfer tubes of the outdoor heat exchanger are arranged in two rows before and after the air flow generated by the rotation of the outdoor fan, and the upper and lower ends of the heat transfer tubes on the rear row side are on the front row side. The upper and lower two connecting portions which are located at a position higher than that and which connect the upper ends and the lower ends of the heat transfer tubes in the front row and the rear row, respectively, are defined as the intermediate portion of the outdoor heat exchanger, and the two intermediate portions and the compressor. A bypass circuit provided with an on-off valve between the discharge side of the compressor and the on-off valve is opened during the defrosting operation, and a part of the refrigerant gas discharged from the compressor is supplied to the two intermediate portions to form a rear row. With the refrigerant gas split up and down from the inlet side of the middle row, In the air conditioner configured to circulate to the side, the connection ports between the outlet side of the bypass circuit and the upper and lower intermediate portions of the outdoor heat exchanger are provided above and below the upper and lower ends of the heat transfer tubes on the rear row side, respectively. The configuration.
【０００６】なお、前記バイパス回路の出口側と前記室
外熱交換器の上下二つの中間部との接続に、上下とその
中間に開口端を有する二つの接続管を用い、それぞれの
接続管の上端に前記バイパス回路の出口側を接続し、中
間の開口端に前記室外熱交換器の後列側の伝熱管の上端
と下端をそれぞれ接続し、下端に前記室外熱交換器の前
列側の伝熱管の上端と下端をそれぞれ接続した構成とす
る。For connecting the outlet side of the bypass circuit and the upper and lower intermediate portions of the outdoor heat exchanger, two connecting pipes having open ends at the upper and lower sides thereof are used, and the upper ends of the respective connecting pipes are connected. The outlet side of the bypass circuit is connected to, the upper end and the lower end of the heat transfer tubes on the rear row side of the outdoor heat exchanger are respectively connected to the intermediate open end, and the lower end of the heat transfer tubes on the front row side of the outdoor heat exchanger is connected. The upper and lower ends are connected together.
【０００７】また、前記室外熱交換器の前列または後列
の伝熱管の中段より上下に流通させた冷媒を後列または
前列の伝熱管の中段より流出させる構成とする。また、
前記開閉弁に電磁弁または電子膨張弁を用いた構成とす
る。また、前記開閉弁に電子膨張弁を用いた場合、同電
子膨張弁を除霜開始直前より徐々に開放し、除霜終了時
に徐々に閉じる構成とする。また、前記除霜運転の開始
直前に前記開閉弁を開放した後、前記四方弁を暖房運転
状態から冷房運転状態に切換え、除霜終了時に前記四方
弁を暖房運転状態に切換えた後、前記開閉弁を閉じる構
成とする。Further, the refrigerant that has flowed up and down above the middle stage of the heat transfer tubes in the front row or the rear row of the outdoor heat exchanger is made to flow out from the middle stage of the heat transfer tubes in the rear row or the front row. Also,
A solenoid valve or an electronic expansion valve is used as the opening / closing valve. When an electronic expansion valve is used as the opening / closing valve, the electronic expansion valve is gradually opened immediately before the start of defrosting and gradually closed at the end of defrosting. In addition, after opening the opening / closing valve immediately before the start of the defrosting operation, the four-way valve is switched from the heating operation state to the cooling operation state, and when the defrosting is completed, the four-way valve is switched to the heating operation state, and then the opening / closing is performed. The valve should be closed.
【０００８】[0008]
【発明の実施の形態】本発明によれば、冷媒回路に用い
る室外熱交換器が空気流に対し前後二列に構成され、か
つ、後列側の伝熱管の上端と下端が前列側のそれよりも
高位置にあり、これら前列と後列の伝熱管の上端同士お
よび下端同士をそれぞれ結合する上下二つの結合部を室
外熱交換器の中間部とし、この二つの中間部と圧縮機の
吐出側との間に開閉弁を具えたバイパス回路を設け、除
霜運転時に、前記開閉弁を開放し、圧縮機の吐出冷媒ガ
スの一部を前記二つの中間部に供給し、後列中段の入口
側より上下に分流させた冷媒ガスと共に前列中段の出口
側へ流通させるようにしてなる空気調和機において、前
記バイパス回路の出口側と前記室外熱交換器の上下二つ
の中間部との接続口を後列側の伝熱管の上下両端よりそ
れぞれ上方に設けた構成とし、バイパス回路からの冷媒
ガスを高位置から供給するようにしているので高温の冷
媒ガスの流れが良くなり、除霜時間の短縮が図れること
になる。According to the present invention, the outdoor heat exchanger used in the refrigerant circuit is constructed in two rows in front and rear with respect to the air flow, and the upper and lower ends of the heat transfer tubes on the rear row side are more than those on the front row side. Is also at a high position, and the upper and lower two joints connecting the upper end and the lower end of the heat transfer tubes in the front row and the rear row are the middle portion of the outdoor heat exchanger, and these two middle portions and the discharge side of the compressor. A bypass circuit equipped with an on-off valve is provided between the two, and during defrosting operation, the on-off valve is opened, and a part of the refrigerant gas discharged from the compressor is supplied to the two intermediate portions, from the inlet side of the rear row middle stage. In an air conditioner configured to circulate to the outlet side of the front row middle stage together with the refrigerant gas split up and down, the connection port between the outlet side of the bypass circuit and the upper and lower two intermediate portions of the outdoor heat exchanger is located in the rear row side. Provided above and below both upper and lower ends of the heat transfer tube Configuration and then, since the refrigerant gas from the bypass circuit is then supplied from the high position the better the flow of hot refrigerant gas, so that can be shortened defrosting time.
【０００９】[0009]
【実施例】以下、本発明の実施例を図１〜図３に基づい
て説明する。図１は空気調和機の冷媒回路を示したもの
で、１は圧縮機、２は圧縮機１より吐出する冷媒の流れ
を暖房運転、冷房運転等に合わせて切換える四方弁、３
は空気流に対し前後二列に構成された室外熱交換器、４
はキャピラリチューブ等を用いた減圧装置、５は室内熱
交換器で、これらは順次配管接続されており、圧縮機１
の吐出側と室外熱交換器３の伝熱管の中間部3a、3bとの
間には電磁弁または電子膨張弁からなる開閉弁６を具え
たバイパス回路が設けられている。なお、７は室外制御
ユニット（図示せず）により制御される室外ファン、８
は室内制御ユニット（図示せず）により制御される室内
ファンである。Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows a refrigerant circuit of an air conditioner, where 1 is a compressor, 2 is a four-way valve that switches the flow of refrigerant discharged from the compressor 1 in accordance with heating operation, cooling operation, etc., 3
Is an outdoor heat exchanger that is configured in two rows before and after the air flow, 4
Is a decompression device using a capillary tube or the like, 5 is an indoor heat exchanger, and these are sequentially connected by pipes.
A bypass circuit having an opening / closing valve 6 composed of a solenoid valve or an electronic expansion valve is provided between the discharge side of the heat exchanger and the intermediate portions 3a and 3b of the heat transfer tubes of the outdoor heat exchanger 3. In addition, 7 is an outdoor fan controlled by an outdoor control unit (not shown), 8
Is an indoor fan controlled by an indoor control unit (not shown).
【００１０】上記構成において、暖房運転時の冷媒は実
線矢印で示すように循環し、圧縮機１により高温高圧に
圧縮された冷媒ガスは、四方弁２を通り、室内熱交換器
５を流れる間に室内ファン８により室内空気と熱交換さ
れ、減圧装置４により減圧液化され、室外熱交換器３を
流れる間に室外ファン７により室外空気と熱交換されて
ガス化し、再度四方弁２を経て圧縮機１の吸入側に戻
る。この暖房運転中に、図示されてない温度検出手段に
より検出される室外熱交換器３の温度が所定値以下にな
ると四方弁２が切換えられて除霜運転に切り替わるが、
本実施例においては、四方弁２の切換えより先に開閉弁
６を開き、図１の白抜矢印で示すように、圧縮機１より
吐出する冷媒ガスの一部を室外熱交換器３の伝熱管の中
間部3a、3bに流入させ、冷媒回路の急激な圧力変化を抑
えるようになっている。In the above structure, the refrigerant during the heating operation circulates as indicated by the solid line arrow, and the refrigerant gas compressed to high temperature and high pressure by the compressor 1 passes through the four-way valve 2 and flows through the indoor heat exchanger 5. The indoor fan 8 exchanges heat with the indoor air, the decompression device 4 liquefies the decompressed air, and while flowing through the outdoor heat exchanger 3, the outdoor fan 7 exchanges heat with the outdoor air to gasify the gas, and the gas is compressed again via the four-way valve 2. Return to the suction side of machine 1. During this heating operation, when the temperature of the outdoor heat exchanger 3 detected by the temperature detecting means (not shown) becomes equal to or lower than a predetermined value, the four-way valve 2 is switched to switch to the defrosting operation.
In this embodiment, the on-off valve 6 is opened prior to the switching of the four-way valve 2, and a part of the refrigerant gas discharged from the compressor 1 is transferred to the outdoor heat exchanger 3 as shown by the white arrow in FIG. It is made to flow into the intermediate portions 3a and 3b of the heat pipe to suppress a sudden pressure change in the refrigerant circuit.
【００１１】なお、開閉弁６に電磁弁を用いた場合、こ
の電磁弁は除霜開始のために四方弁２が切換わる直前に
開放し、除霜終了時四方弁２が切換わった後に閉じるよ
うになっている。また、開閉弁６に電子膨張弁を用いた
場合、この電子膨張弁は除霜開始直前より徐々に開放
し、除霜終了時に徐々に閉じるようになっている。ま
た、室内ファン８および室外ファン７は除霜開始時に停
止し、除霜終了時に室外ファン７が送風運転を開始し、
その後室内ファン８を送風運転開始するようになってい
る。このような運転が行われることにより冷媒回路の急
激な圧力変化が抑えられるので四方弁２の切換時に圧縮
機１を一時停止させずに済む。なお、図１に示す破線矢
印は冷房運転時および除霜運転時の冷媒の流れを示して
いる。When a solenoid valve is used as the opening / closing valve 6, this solenoid valve is opened immediately before the four-way valve 2 is switched to start defrosting and closed after the four-way valve 2 is switched at the end of defrosting. It is like this. When an electronic expansion valve is used as the opening / closing valve 6, this electronic expansion valve is gradually opened immediately before the start of defrosting and gradually closed at the end of defrosting. Further, the indoor fan 8 and the outdoor fan 7 are stopped at the start of defrosting, and the outdoor fan 7 starts the blowing operation at the end of defrosting,
After that, the indoor fan 8 is started to blow. By performing such an operation, a rapid pressure change in the refrigerant circuit is suppressed, so that it is not necessary to temporarily stop the compressor 1 when switching the four-way valve 2. The broken line arrows shown in FIG. 1 indicate the flow of the refrigerant during the cooling operation and the defrosting operation.
【００１２】図２は本発明の特徴とする室外熱交換器３
の配管接続構成を示したものである。この室外熱交換器
３は室外ファン７の運転によって発生する空気流に対し
前後二列に構成されており、後列側の伝熱管の上端と下
端が前列側のそれよりも高位置にあり、これら前列と後
列の伝熱管の上端同士および下端同士をそれぞれ結合す
る上下二つの結合部がこの室外熱交換器３の中間部3a、
3bとなっており、同中間部3a、3bと圧縮機１の吐出側と
の間に前述の開閉弁６を具えたバイパス回路が設けられ
ている。また、冷房運転時、暖房運転時等に冷媒が出入
りする入口と出口は前列および後列の中段に設けられて
いる。また、前述のバイパス回路の出口側と室外熱交換
器３の上下二つの中間部3a、3bとの接続口を後列側の伝
熱管の上下両端よりそれぞれ上方に設けた構成としてい
る。FIG. 2 shows an outdoor heat exchanger 3 which is a feature of the present invention.
2 shows the pipe connection configuration of FIG. The outdoor heat exchanger 3 is arranged in two rows in front and rear with respect to the air flow generated by the operation of the outdoor fan 7, and the upper and lower ends of the heat transfer tubes on the rear row side are located higher than those on the front row side. The upper and lower connecting portions for connecting the upper ends and the lower ends of the heat transfer tubes in the front row and the rear row are the intermediate portion 3a of the outdoor heat exchanger 3,
3b, and a bypass circuit including the above-mentioned on-off valve 6 is provided between the intermediate portions 3a and 3b and the discharge side of the compressor 1. Further, an inlet and an outlet through which refrigerant flows in and out during a cooling operation, a heating operation, etc. are provided in the middle of the front row and the rear row. Further, the outlet side of the bypass circuit and the connection ports between the upper and lower intermediate portions 3a and 3b of the outdoor heat exchanger 3 are provided above and below the upper and lower ends of the rear row side heat transfer tube, respectively.
【００１３】なお、バイパス回路の出口側と、室外熱交
換器３の上下それぞれの中間部3a、3bとの接続には、上
下とその中間に開口端を有する二つの接続管９（例えば
Ｔ字形接続管）を用い、上下それぞれの接続管９の上端
にバイパス回路の出口側を接続し、中間の開口端に室外
熱交換器３の後列側の伝熱管の上端と下端をそれぞれ接
続し、下端に室外熱交換器３の前列側の伝熱管の上端と
下端をそれぞれ接続した構成としている。このような配
管構成であれば、除霜運転時のみならず図３に示すよう
な暖房運転時および冷房運転時においても上下二つの結
合部における冷媒の流れが良く、特に除霜運転時にはバ
イパス回路から流入する高温の冷媒の流れが良くなり、
従来遅れがちであった中間部3a、3bから出口側にかけて
の下流側の除霜が早まり、室外熱交換器３全体の除霜時
間の短縮が図れることになる。The outlet side of the bypass circuit and the upper and lower intermediate portions 3a and 3b of the outdoor heat exchanger 3 are connected to each other by two connecting pipes 9 (for example, a T-shape) having open ends at the upper and lower sides thereof. Connection pipe), the outlet side of the bypass circuit is connected to the upper ends of the upper and lower connecting pipes 9, the upper end and the lower end of the heat transfer pipes on the rear row side of the outdoor heat exchanger 3 are connected to the intermediate open end, and the lower end is connected. The upper end and the lower end of the heat transfer tubes on the front row side of the outdoor heat exchanger 3 are connected to each other. With such a pipe configuration, the flow of the refrigerant in the upper and lower coupling portions is good not only during the defrosting operation but also during the heating operation and the cooling operation as shown in FIG. The flow of high temperature refrigerant flowing in from
Defrosting on the downstream side from the intermediate portions 3a, 3b, which has been apt to be delayed in the past, to the outlet side is accelerated, and the defrosting time of the entire outdoor heat exchanger 3 can be shortened.
【００１４】[0014]
【発明の効果】以上説明したように配管構成された室外
熱交換器を有する空気調和機であるならば、除霜運転時
間がより短縮されるため、除霜運転に伴う室温の低下も
少なくなり暖房運転時の快適性が向上する。EFFECT OF THE INVENTION In the case of the air conditioner having the outdoor heat exchanger having the pipe structure as described above, the defrosting operation time is further shortened, so that the decrease in the room temperature due to the defrosting operation is reduced. Improves comfort during heating operation.
【図１】本発明および従来例に係わ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 and a conventional example.
【図２】本発明の一実施例を示す室外熱交換器の配管接
続構成図である。FIG. 2 is a piping connection configuration diagram of an outdoor heat exchanger showing an embodiment of the present invention.
【図３】本発明に基づく配管接続がなされた室外熱交換
器の暖房運転時および冷房運転時の冷媒の流れを示す図
である。FIG. 3 is a diagram showing the flow of the refrigerant during heating operation and cooling operation of the outdoor heat exchanger connected by piping according to the present invention.
【図４】従来例を示す室外熱交換器の配管接続構成図で
ある。FIG. 4 is a pipe connection configuration diagram of an outdoor heat exchanger showing a conventional example.
１ 圧縮機 ２ 四方弁 ３ 室外熱交換器 3a、3b 中間部 ４ 減圧装置（キャピラリチューブ） ５ 室内熱交換器 ６ 開閉弁（電磁弁または電子膨張弁） ７ 室外ファン ８ 室内ファン ９ 接続管（Ｔ字形接続管） 1 compressor 2 four-way valve 3 outdoor heat exchanger 3a, 3b middle part 4 Pressure reducing device (capillary tube) 5 Indoor heat exchanger 6 Open / close valve (solenoid valve or electronic expansion valve) 7 outdoor fan 8 indoor fans 9 Connection pipe (T-shaped connection pipe)
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−194000（ＪＰ，Ａ) 特開 平６−74603（ＪＰ，Ａ) 特開 平６−241623（ＪＰ，Ａ) 特開 昭64−6662（ＪＰ，Ａ) 特開 平２−64393（ＪＰ，Ａ) 特開 平５−340593（ＪＰ，Ａ) 実開 平２−114882（ＪＰ，Ｕ) 実開 昭62−127467（ＪＰ，Ｕ) 実開 昭58−158893（ＪＰ，Ｕ) 実開 昭61−46367（ＪＰ，Ｕ) 実開 昭58−174661（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F25B 47/02 550 F25B 47/02 530 F25B 39/00 F25B 39/02 F25B 39/04 ─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-6-194000 (JP, A) JP-A-6-74603 (JP, A) JP-A-6-241623 (JP, A) JP-A-64- 6662 (JP, A) JP 2-64393 (JP, A) JP 5-340593 (JP, A) Actual opening 2-114882 (JP, U) Actual opening Sho 62-127467 (JP, U) Actual development Sho 58-158893 (JP, U) Actual development Sho 61-46367 (JP, U) Actual development Sho 58-174661 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) F25B 47/02 550 F25B 47/02 530 F25B 39/00 F25B 39/02 F25B 39/04
Claims (7)
減圧装置と、室内熱交換器とを順次配管接続してなり、
前記室外熱交換器の伝熱管が室外ファンの回転に伴って
発生する空気流に対し前後二列に構成され、かつ、後列
側の伝熱管の上端と下端が前列側のそれよりも高位置に
あり、これら前列と後列の伝熱管の上端同士および下端
同士をそれぞれ結合する上下二つの結合部を前記室外熱
交換器の中間部とし、この二つの中間部と前記圧縮機の
吐出側との間に開閉弁を具えたバイパス回路を設け、除
霜運転時に、前記開閉弁を開放し、前記圧縮機の吐出冷
媒ガスの一部を前記二つの中間部に供給し、後列中段の
入口側より上下に分流させた冷媒ガスと共に前列中段の
出口側へ流通させるようにしてなる空気調和機におい
て、前記バイパス回路の出口側と前記室外熱交換器の上
下二つの中間部との接続口を後列側の伝熱管の上下両端
よりそれぞれ上方に設け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,
The decompression device and the indoor heat exchanger are connected by piping in sequence,
The heat transfer tubes of the outdoor heat exchanger are arranged in two rows in front and rear with respect to the air flow generated with the rotation of the outdoor fan, and the upper and lower ends of the heat transfer tubes on the rear row side are located at a position higher than that on the front row side. Yes, the upper and lower two coupling portions for coupling the upper end and the lower end of the heat transfer tubes in the front row and the rear row respectively are the middle portions of the outdoor heat exchanger, and the two middle portions and the discharge side of the compressor are provided. A bypass circuit equipped with an on-off valve is provided, and during defrosting operation, the on-off valve is opened, and a part of the refrigerant gas discharged from the compressor is supplied to the two intermediate portions, and the upper and lower sides from the inlet side of the rear row middle stage In the air conditioner configured to be circulated to the outlet side of the front row middle stage together with the refrigerant gas that has been split into two, the connection port between the outlet side of the bypass circuit and the upper and lower two intermediate portions of the outdoor heat exchanger on the rear row side. Above the upper and lower ends of the heat transfer tube Only the air conditioner, characterized by comprising.
交換器の上下二つの中間部との接続に、上下とその中間
に開口端を有する二つの接続管を用い、それぞれの接続
管の上端に前記バイパス回路の出口側を接続し、中間の
開口端に前記室外熱交換器の後列側の伝熱管の上端と下
端をそれぞれ接続し、下端に前記室外熱交換器の前列側
の伝熱管の上端と下端をそれぞれ接続してなる請求項１
記載の空気調和機。2. The connection between the outlet side of the bypass circuit and the upper and lower intermediate portions of the outdoor heat exchanger uses two connecting pipes having open ends at the upper and lower sides thereof, and the upper ends of the respective connecting pipes. The outlet side of the bypass circuit is connected to, the upper end and the lower end of the heat transfer tubes on the rear row side of the outdoor heat exchanger are respectively connected to the intermediate open end, and the lower end of the heat transfer tubes on the front row side of the outdoor heat exchanger is connected. The upper end and the lower end are connected to each other.
Air conditioner described.
熱管の中段より上下に流通させた冷媒を後列または前列
の伝熱管の中段より流出させるようにしてなる請求項１
記載の空気調和機。3. The refrigerant flowing vertically above and below the middle stage of the heat transfer tubes in the front row or rear row of the outdoor heat exchanger is discharged from the middle stage of the heat transfer tubes in the rear row or front row.
Air conditioner described.
１記載の空気調和機。4. The air conditioner according to claim 1, wherein an electromagnetic valve is used as the opening / closing valve.
求項１記載の空気調和機。5. The air conditioner according to claim 1, wherein an electronic expansion valve is used as the opening / closing valve.
同電子膨張弁を除霜開始直前より徐々に開放し、除霜終
了時に徐々に閉じるようにしてなる請求項４記載の空気
調和機。6. When an electronic expansion valve is used as the opening / closing valve,
The air conditioner according to claim 4, wherein the electronic expansion valve is gradually opened immediately before the start of defrosting and gradually closed at the end of defrosting.
開放した後、前記四方弁を暖房運転状態から冷房運転状
態に切換え、除霜終了時に前記四方弁を暖房運転状態に
切換えた後、前記開閉弁を閉じるようにしてなる請求項
１記載の空気調和機。7. After opening the on-off valve immediately before the start of the defrosting operation, switching the four-way valve from a heating operation state to a cooling operation state, and after switching the four-way valve to a heating operation state at the end of defrosting. The air conditioner according to claim 1, wherein the on-off valve is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00719397A JP3480217B2 (en) | 1997-01-20 | 1997-01-20 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00719397A JP3480217B2 (en) | 1997-01-20 | 1997-01-20 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10205934A JPH10205934A (en) | 1998-08-04 |
| JP3480217B2 true JP3480217B2 (en) | 2003-12-15 |
Family
ID=11659209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00719397A Expired - Fee Related JP3480217B2 (en) | 1997-01-20 | 1997-01-20 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3480217B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5146139B2 (en) * | 2008-06-20 | 2013-02-20 | 株式会社デンソー | Refrigeration cycle equipment |
| CN107160972B (en) | 2017-06-19 | 2023-05-23 | 珠海格力电器股份有限公司 | Electric automobile, heat pump air conditioner assembly of electric automobile and control method of heat pump air conditioner assembly |
| CN108224602A (en) * | 2018-01-31 | 2018-06-29 | 青岛海尔空调器有限总公司 | For the branch pipe and air conditioner of outdoor heat exchanger of air conditioner |
| KR20210104476A (en) * | 2020-02-17 | 2021-08-25 | 엘지전자 주식회사 | Air conditioner |
-
1997
- 1997-01-20 JP JP00719397A patent/JP3480217B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10205934A (en) | 1998-08-04 |
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