JPH06337178A - Defrosting method of air-conditioning machine - Google Patents
Defrosting method of air-conditioning machineInfo
- Publication number
- JPH06337178A JPH06337178A JP14866593A JP14866593A JPH06337178A JP H06337178 A JPH06337178 A JP H06337178A JP 14866593 A JP14866593 A JP 14866593A JP 14866593 A JP14866593 A JP 14866593A JP H06337178 A JPH06337178 A JP H06337178A
- Authority
- JP
- Japan
- Prior art keywords
- outdoor
- indoor
- heat exchanger
- heat exchangers
- liquid
- 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.)
- Withdrawn
Links
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は複数の室内ユニットを備
え、冷房運転、暖房運転及び冷・暖房同時運転が可能な
空気調和機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner having a plurality of indoor units and capable of cooling operation, heating operation and simultaneous cooling / heating operation.
【０００２】[0002]
【従来の技術】従来のこの種空気調和機の１例が図１に
示されている。図１において、１は圧縮機、10は吐出管
で、圧縮機１の吐出側に接続されている。11は吸入管
で、圧縮機１の吸入側に接続されている。3A、3Bは互い
に容量が異なる室外側熱交換器で、そのガス側はそれぞ
れ室外側切換弁2A、2Bを介して吐出管10又は吸入管11に
選択的に接続される。2. Description of the Related Art An example of a conventional air conditioner of this type is shown in FIG. In FIG. 1, 1 is a compressor and 10 is a discharge pipe, which is connected to the discharge side of the compressor 1. A suction pipe 11 is connected to the suction side of the compressor 1. 3A and 3B are outdoor heat exchangers having different capacities, and their gas sides are selectively connected to the discharge pipe 10 or the suction pipe 11 via the outdoor switching valves 2A and 2B, respectively.
【０００３】4A、4Bは室外側絞り機構で、室外側熱交換
器3A、3Bの液側に配設されている。そして、これら室外
側絞り機構4A、4Bの液側には室外側電磁弁19A 、19B が
設けられている。室外側熱交換器3A、3Bに外気を送風す
るために室外側送風機13A 、13B が設けられ、一方の室
外側送風機13A は高速で回転し、他方の室外側送風機13
B は高速と低速の２速に切り換え得るようになってい
る。Reference numerals 4A and 4B are outdoor throttling mechanisms, which are arranged on the liquid side of the outdoor heat exchangers 3A and 3B. The outdoor solenoid valves 19A, 19B are provided on the liquid side of the outdoor throttle mechanisms 4A, 4B. Outdoor blowers 13A and 13B are provided to blow outside air to the outdoor heat exchangers 3A and 3B, and one outdoor blower 13A rotates at high speed and the other outdoor blower 13A
B can be switched between high speed and low speed.
【０００４】7A、7B、7Cは室内側熱交換器で、そのガス
側はそれぞれ室内側切換弁8A、8B、8Cを介して吐出管10
又は吸入管11に選択的に接続される。6A、6B、6Cは室内
側絞り機構で、それぞれ室内側熱交換器7A、7B、7Cの液
側に配設されている。9A、9B、9Cは室内側送風機で、室
内側熱交換器7A、7B、7Cに室内空気を流過させる。7A, 7B and 7C are indoor heat exchangers, and their gas sides are provided with discharge pipes 10 through indoor switching valves 8A, 8B and 8C, respectively.
Alternatively, it is selectively connected to the suction pipe 11. Reference numerals 6A, 6B, and 6C denote indoor throttle mechanisms, which are provided on the liquid sides of the indoor heat exchangers 7A, 7B, and 7C, respectively. 9A, 9B and 9C are indoor blowers, which allow indoor air to flow through the indoor heat exchangers 7A, 7B and 7C.
【０００５】12は液冷媒配管で、室外側電磁弁19A 、19
B の液側と室内側絞り機構6A、6B、6Cの液側とを接続し
ている。５はレシーバで、液冷媒配管12に介装されてい
る。14はアキュムレータで、圧縮機１の吸入側に介装さ
れている。Reference numeral 12 denotes a liquid refrigerant pipe, which is an outdoor solenoid valve 19A, 19A.
The liquid side of B is connected to the liquid sides of the indoor throttle mechanisms 6A, 6B, 6C. A receiver 5 is provided in the liquid refrigerant pipe 12. An accumulator 14 is provided on the suction side of the compressor 1.
【０００６】Ｏは室外ユニットで、この中には圧縮機
１、室外側切換弁2A、2B、室外側熱交換器3A、3B、室外
側送風機13A 、13B 、室外側絞り機構4A、4B、室外側電
磁弁19A 、19B 、レシーバ５、アキュムレータ14等が内
蔵されている。O is an outdoor unit, in which the compressor 1, the outdoor switching valves 2A and 2B, the outdoor heat exchangers 3A and 3B, the outdoor blowers 13A and 13B, the outdoor throttle mechanisms 4A and 4B, and the outdoor unit The outer solenoid valves 19A and 19B, the receiver 5, the accumulator 14 and the like are incorporated.
【０００７】Ａ、Ｂ、Ｃはそれぞれ室内ユニットで、室
内ユニットＡには室内側熱交換器7A、室内側切換弁8A、
室内側絞り機構6A及び室内側送風機9Aが内蔵され、室内
ユニットＢには室内側熱交換器7B、室内側切換弁8B、室
内側絞り機構6B及び室内側送風機9Bが内蔵され、室内ユ
ニットＣには室内側熱交換器7C、室内側切換弁8C、室内
側絞り機構6C及び室内側送風機9Cが内蔵されている。A, B, and C are indoor units, and the indoor unit A includes an indoor heat exchanger 7A, an indoor switching valve 8A,
The indoor side expansion mechanism 6A and the indoor side blower 9A are built in, the indoor side heat exchanger 7B, the indoor side switching valve 8B, the indoor side expansion mechanism 6B and the indoor side blower 9B are built in the indoor unit B, and the indoor unit C is installed. Includes an indoor heat exchanger 7C, an indoor switching valve 8C, an indoor throttle mechanism 6C, and an indoor blower 9C.
【０００８】室外ユニットＯと複数の室内ユニットＡ、
Ｂ、Ｃとは吐出管10、吸入管11、液冷媒配管12を介して
互いに接続されている。An outdoor unit O and a plurality of indoor units A,
B and C are connected to each other via a discharge pipe 10, a suction pipe 11 and a liquid refrigerant pipe 12.
【０００９】室内ユニットＡ、Ｂ、Ｃの冷房運転時、室
外側絞り機構4A、4B及び室外側電磁弁19A 、19B は開と
され、室内側絞り機構6A、6B、6Cは予め定められた開度
とされる。そして、室外側切換弁2A、2Bは室外側熱交換
器3A、3Bを吐出管10に連通させるように切り換えられ、
室内側切換弁8A、8B、8Cは室内側熱交換器7A、7B、7Cを
吸入管11に連通させるように切り換えられる。During the cooling operation of the indoor units A, B, C, the outdoor expansion mechanisms 4A, 4B and the outdoor solenoid valves 19A, 19B are opened, and the indoor expansion mechanisms 6A, 6B, 6C are opened in advance. It is regarded as a degree. Then, the outdoor switching valves 2A, 2B are switched so that the outdoor heat exchangers 3A, 3B communicate with the discharge pipe 10,
The indoor switching valves 8A, 8B, 8C are switched so that the indoor heat exchangers 7A, 7B, 7C communicate with the suction pipe 11.
【００１０】すると、圧縮機１で圧縮された冷媒ガスは
吐出管10、室外側切換弁2A、2Bを経て室外側熱交換器3
A、3Bに入り、ここで室外側送風機13A 、13B によって
送風される外気に放熱することにより凝縮液化して液冷
媒となる。次いで、この液冷媒は全開とされた室外側絞
り機構4A、4B及び室外側電磁弁19A 、19B を通過してレ
シーバ５に入り、ここでガス成分が分離される。Then, the refrigerant gas compressed by the compressor 1 passes through the discharge pipe 10, the outdoor switching valves 2A and 2B, and the outdoor heat exchanger 3
It enters into A and 3B, where it radiates heat to the outside air blown by the outdoor blowers 13A and 13B to be condensed and liquefied to become a liquid refrigerant. Next, this liquid refrigerant passes through the fully-opened outdoor throttle mechanisms 4A, 4B and the outdoor solenoid valves 19A, 19B and enters the receiver 5, where the gas components are separated.
【００１１】レシーバ５から流出した液冷媒は液冷媒配
管12を経て室内側絞り機構6A、6B、6Cに入り、ここで絞
られることによって断熱膨張して気液二相となる。この
気液二相の冷媒は室内側熱交換器7A、7B、7Cに入り、こ
こで室内側送風機9A、9B、9Cによって送風される室内空
気を冷却することによって蒸発気化する。このガス冷媒
は室内側切換弁8A、8B、8C、吸入管11、アキュムレータ
14を経て圧縮機１に吸入される。The liquid refrigerant flowing out from the receiver 5 enters the indoor throttle mechanisms 6A, 6B, 6C through the liquid refrigerant pipe 12 and is adiabatically expanded by being throttled there to become a gas-liquid two phase. The gas-liquid two-phase refrigerant enters the indoor heat exchangers 7A, 7B, 7C, where it evaporates and vaporizes by cooling the indoor air blown by the indoor blowers 9A, 9B, 9C. This gas refrigerant is used for indoor switching valves 8A, 8B, 8C, suction pipe 11, accumulator.
It is sucked into the compressor 1 via 14.
【００１２】室内ユニットＡ、Ｂ、Ｃの暖房運転時、室
外側絞り機構4A、4B、室内側絞り機構6A、6B、6Cは予め
定められた開度とされる。そして、室外側切換弁2A、2
B、室内側切換弁8A、8B、8Cは上記冷房運転と逆に切り
換えられる。During the heating operation of the indoor units A, B, C, the outdoor expansion mechanisms 4A, 4B and the indoor expansion mechanisms 6A, 6B, 6C are set to predetermined opening degrees. Then, the outdoor switching valves 2A, 2
B, the indoor switching valves 8A, 8B, 8C are switched in the reverse of the above cooling operation.
【００１３】かくして、圧縮機１から吐出された冷媒は
吐出管10、室内側切換弁8A、8B、8Cを経て室内側熱交換
器7A、7B、7Cで凝縮液化し、室内側絞り機構6A、6B、6C
で絞られた後、液冷媒配管12、レシーバ５、室外側電磁
弁19A 、19B を経て室外側絞り機構4A、4Bで断熱膨張す
る。次いで、室外側熱交換器3A、3Bで蒸発気化した後、
室外側切換弁2A、2B、吸入管11、アキュムレータ14をこ
の順に経て圧縮機１に戻る。Thus, the refrigerant discharged from the compressor 1 is condensed and liquefied in the indoor heat exchangers 7A, 7B, 7C through the discharge pipe 10, the indoor switching valves 8A, 8B, 8C, and the indoor throttle mechanism 6A, 6B, 6C
After being throttled by, the liquid refrigerant pipe 12, the receiver 5, the outdoor solenoid valves 19A, 19B and adiabatically expanded by the outdoor throttle mechanisms 4A, 4B. Then, after evaporating by the outdoor heat exchangers 3A, 3B,
The outdoor side switching valves 2A and 2B, the suction pipe 11, and the accumulator 14 are returned to the compressor 1 in this order.
【００１４】冷・暖房同時運転時において、冷房運転さ
れる室内ユニットの数と暖房運転される室内ユニットの
数が等しいとき、例えば、室内ユニットＣが冷房運転、
室内ユニットＡが暖房運転、室内ユニットＢが休止され
る場合、室外側絞り機構4A、4B及び室内側絞り機構6Bが
全閉、室内側絞り機構6A、6Cは予め定められた開度とさ
れる。そして、室内側切換弁8Aは吐出管10に連通し、室
内側切換弁8Cは吸入管11に連通するように切り換えられ
る。In the simultaneous cooling / heating operation, when the number of indoor units operated in cooling is equal to the number of indoor units operated in heating, for example, the indoor unit C is operated in cooling operation,
When the indoor unit A is in the heating operation and the indoor unit B is stopped, the outdoor side expansion mechanisms 4A and 4B and the indoor side expansion mechanism 6B are fully closed, and the indoor expansion mechanisms 6A and 6C are set to predetermined opening degrees. . Then, the indoor switching valve 8A is switched to communicate with the discharge pipe 10, and the indoor switching valve 8C is switched to communicate with the suction pipe 11.
【００１５】かくして、圧縮機１から吐出された冷媒は
吐出管10、室内側切換弁8A、室内側熱交換器7A、室内側
絞り機構6A、液冷媒配管12、室内側絞り機構6C、室内側
熱交換器7C、室内側切換弁8C、吸入管11、アキュムレー
タ14をこの順に経て圧縮機１に戻る。Thus, the refrigerant discharged from the compressor 1 has a discharge pipe 10, an indoor switching valve 8A, an indoor heat exchanger 7A, an indoor throttle mechanism 6A, a liquid refrigerant pipe 12, an indoor throttle mechanism 6C and an indoor side. The heat exchanger 7C, the indoor-side switching valve 8C, the suction pipe 11, and the accumulator 14 are returned in this order to the compressor 1 in this order.
【００１６】室内ユニットＡ、Ｂ、Ｃの運転台数、負荷
及び運転モードに応じて室外側切換弁2A、2B、室外側電
磁弁19A 、19B 及び室外側送風機13A 、13B の運転台数
及び回転速度を順次切り換えることによって室外ユニッ
トＯの能力が自動的に変化し、冷媒回路内高圧が上限値
になると、高圧を下げる運転パターンに、冷媒回路内高
圧が下限値になると、高圧を上げる運転パターンに順次
切り換えられる。Depending on the number of operating indoor units A, B, C, load and operating mode, the number of operating outdoor switching valves 2A, 2B, outdoor solenoid valves 19A, 19B and outdoor blowers 13A, 13B can be adjusted. By sequentially switching, the capacity of the outdoor unit O automatically changes, and when the high pressure in the refrigerant circuit becomes the upper limit value, the operation pattern is decreased, and when the high pressure in the refrigerant circuit becomes the lower limit value, the operation pattern is increased. Can be switched.
【００１７】暖房運転時、暖房運転中の室内ユニットの
数が減少し又は暖房負荷が少ないときには室外側熱交換
器3A、3Bの一方を蒸発器として機能させ、他方を休止す
る容量制御運転が行われる。この容量制御運転中、例え
ば、室外側電磁弁19B が閉、室外側電磁弁19A が開とさ
れ、液冷媒が液冷媒配管12から室外側電磁弁19A 、室外
側絞り機構4A、室外側熱交換器3A、室外側切換弁2Aを通
って吸入管11に流出することにより室外側熱交換器3Aが
蒸発器として機能しているとき、この室外側熱交換器3A
の表面に霜が付着すると、これを検知したセンサーから
の指令にり又は一定周期毎にデフロスト運転が行われ
る。During the heating operation, when the number of indoor units during the heating operation is reduced or the heating load is small, one of the outdoor heat exchangers 3A and 3B functions as an evaporator, and the other one is in a capacity control operation. Be seen. During this capacity control operation, for example, the outdoor solenoid valve 19B is closed and the outdoor solenoid valve 19A is opened, and liquid refrigerant flows from the liquid refrigerant pipe 12 to the outdoor solenoid valve 19A, the outdoor throttle mechanism 4A, the outdoor heat exchange. When the outdoor heat exchanger 3A functions as an evaporator by flowing out to the suction pipe 11 through the outdoor unit 3A and the outdoor switching valve 2A, the outdoor heat exchanger 3A
When frost adheres to the surface of the defroster, the defrosting operation is performed in response to a command from the sensor that detects it or at regular intervals.
【００１８】このデフロスト運転においては、暖房運転
中の室内ユニットの室内側切換弁が吸入管11に連通する
ように切り換えられると同時に室外側切換弁2Aが吐出管
10に連通するように切り換えられる。この結果、吐出管
10からの高温・高圧のガス冷媒が室外側切換弁2Aを経て
室外側熱交換器3Aに流入してその表面に付着した霜を溶
融することによって液化する。そして、この室外側熱交
換器3Aから流出した液冷媒が暖房運転中の室内側熱交換
器で蒸発する。In this defrost operation, the indoor switching valve of the indoor unit during the heating operation is switched to communicate with the suction pipe 11, and at the same time, the outdoor switching valve 2A is switched to the discharge pipe.
Switched to communicate with 10. As a result, the discharge pipe
The high-temperature, high-pressure gas refrigerant from 10 flows into the outdoor heat exchanger 3A through the outdoor switching valve 2A and melts the frost adhering to the surface thereof to be liquefied. Then, the liquid refrigerant flowing out from the outdoor heat exchanger 3A is evaporated in the indoor heat exchanger during the heating operation.
【００１９】[0019]
【発明が解決しようとする課題】上記従来の空気調和機
の暖房運転時の容量制御運転中にデフロスト運転が行わ
れると、暖房フィーリングを著しく悪化させるという問
題があった。If the defrost operation is performed during the capacity control operation during the heating operation of the conventional air conditioner, there is a problem that the heating feeling is significantly deteriorated.
【００２０】[0020]
【課題を解決するための手段】本発明は上記課題を解決
するために発明されたものであって、その要旨とすると
ころは、圧縮機と、この圧縮機の吐出側に接続された吸
入管と、上記圧縮機の吸込側に接続された吸入管と、複
数の室外側熱交換器と、上記複数の室外側熱交換器のガ
ス側をそれぞれ上記吐出管又は上記吸入管に選択的に連
通させる室外側切換弁と、上記複数の室外側熱交換器の
液側にそれぞれ配設された室外側絞り機構と、上記室外
側絞り機構の液側にそれぞれ配設された室外側電磁弁
と、複数の室内側熱交換器と、上記複数の室内側熱交換
器のガス側をそれぞれ上記吐出管又は上記吸入管に選択
的に連通させる室内側切換弁と、上記複数の室内側熱交
換器の液側にそれぞれ配設された室内側絞り機構と、上
記室内側絞り機構の液側と上記室外側電磁弁の液側とを
接続する液冷媒配管とを備え、冷房運転、暖房運転、冷
・暖房同時運転しうる空気調和機において、暖房運転
時、上記複数の室外側熱交換器のうち一部を蒸発器とし
て機能させ残部を休止した容量制御運転中に上記一部の
室外側熱交換器に着霜したとき、上記室外側切換弁を切
り換えることによって休止中の残部の室外側熱交換器を
蒸発器として機能させると同時に着霜した上記一部の室
外側熱交換器の液側の室外側電磁弁を閉とすることによ
ってこの一部の室外側熱交換器に圧縮機からの高温ガス
冷媒を流入させて除霜することを特徴とする空気調和機
の除霜方法にある。The present invention has been invented to solve the above-mentioned problems, and its gist is to provide a compressor and a suction pipe connected to the discharge side of the compressor. And a suction pipe connected to the suction side of the compressor, a plurality of outdoor heat exchangers, and gas sides of the plurality of outdoor heat exchangers selectively communicating with the discharge pipe or the suction pipe, respectively. An outdoor switching valve, an outdoor throttle mechanism disposed on the liquid side of each of the plurality of outdoor heat exchangers, an outdoor solenoid valve disposed on the liquid side of the outdoor throttle mechanism, A plurality of indoor side heat exchangers, an indoor side switching valve for selectively communicating the gas side of the plurality of indoor side heat exchangers with the discharge pipe or the suction pipe, and a plurality of indoor side heat exchangers The indoor side throttle mechanism arranged on the liquid side and the indoor side throttle mechanism Side and a liquid refrigerant pipe connecting the liquid side of the outdoor solenoid valve, in an air conditioner capable of cooling operation, heating operation, and cooling / heating simultaneous operation, during heating operation, the plurality of outdoor heat exchanges When part of the outdoor heat exchanger is frosted during capacity control operation in which a part of the reactor functions as an evaporator and the rest is inactive, the remaining outdoor chamber is switched by switching the outdoor switching valve. By making the outside heat exchanger function as an evaporator and closing the liquid side outdoor solenoid valve of the above-mentioned part of the outdoor heat exchanger that has been frosted, the part of the outdoor heat exchanger is compressed by the compressor. The defrosting method for an air conditioner is characterized in that a high temperature gas refrigerant from the above is introduced for defrosting.
【００２１】[0021]
【実施例】暖房運転時の容量制御運転中、例えば、室外
側熱交換器3Aが蒸発器として機能し、室外側熱交換器3B
が休止しているとき、デフロスト信号が入力されると、
室外側電磁弁19B を開くと同時に室外側切換弁2Bを吸入
管11に連通するように切り換えることによって休止中の
室外側熱交換器3Bを蒸発器として機能させる。これと同
時に室外側電磁弁19A を閉、室外側切換弁2Aを吐出管10
に連通するように切り換えることによって、圧縮機１か
らの高温のガス冷媒を室外側熱交換器3Aに流入させる。
なお、暖房運転中の室内ユニットの室内側切換弁8A、8
B、8Cは吐出管10を連通したままに維持される。[Example] During capacity control operation during heating operation, for example, the outdoor heat exchanger 3A functions as an evaporator, and the outdoor heat exchanger 3B
When the defrost signal is input while the
At the same time as opening the outdoor solenoid valve 19B, the outdoor switching valve 2B is switched so as to communicate with the suction pipe 11, whereby the outdoor heat exchanger 3B at rest is made to function as an evaporator. At the same time, the outdoor solenoid valve 19A is closed and the outdoor switching valve 2A is connected to the discharge pipe 10.
The high temperature gas refrigerant from the compressor 1 is caused to flow into the outdoor heat exchanger 3A by switching the communication to the outdoor heat exchanger 3A.
In addition, the indoor side switching valves 8A, 8 of the indoor unit during the heating operation.
B and 8C are maintained in communication with the discharge pipe 10.
【００２２】かくして、室外側熱交換器3Aの外面に付着
した霜はこの室外側熱交換器3Aに流入した高温のガス冷
媒によって融解され、ガス冷媒は液化してこの中に溜ま
る。Thus, the frost adhering to the outer surface of the outdoor heat exchanger 3A is melted by the high-temperature gas refrigerant flowing into the outdoor heat exchanger 3A, and the gas refrigerant is liquefied and accumulated therein.
【００２３】このデフロスト運転中電磁弁19A が閉とさ
れているので、高温のガス冷媒が電磁弁19A を通って室
外側熱交換器3Bにバイパスすることはない。そして、暖
房運転中の室内ユニットの室内側熱交換器7A、7B、7Cに
は吐出管10、室内側切換弁8A、8B、8Cを経て高温のガス
冷媒に流入してここで放熱するので、室内の暖房を継続
することができる。Since the electromagnetic valve 19A is closed during the defrosting operation, the high temperature gas refrigerant does not bypass the outdoor heat exchanger 3B through the electromagnetic valve 19A. Then, since the indoor heat exchanger 7A, 7B, 7C of the indoor unit during the heating operation flows into the hot gas refrigerant through the discharge pipe 10, the indoor switching valves 8A, 8B, 8C and radiates heat there, You can continue heating the room.
【００２４】なお、このデフロスト運転によって室外側
熱交換器3Bに霜が付着した場合には、通常のデフロスト
運転が行われ、室外側熱交換器3A及び3Bに高温のガス冷
媒が流入するが、このデフロスト運転時間は通常のそれ
より短くて足りる。When frost adheres to the outdoor heat exchanger 3B due to this defrost operation, a normal defrost operation is performed and high-temperature gas refrigerant flows into the outdoor heat exchangers 3A and 3B. This defrost operation time is shorter than usual.
【００２５】また、このデフロスト運転によって室外側
熱交換器3Aの外面に付着した霜が溶融すれば、元の状
態、即ち、室外側熱交換器3Aが蒸発器として機能し、室
外側熱交換器3Bが休止中の状態に復帰する。If the frost attached to the outer surface of the outdoor heat exchanger 3A is melted by the defrosting operation, the original condition, that is, the outdoor heat exchanger 3A functions as an evaporator, and the outdoor heat exchanger is 3B returns to a dormant state.
【００２６】以上、室外側熱交換器3Aが蒸発器として機
能し、室外側熱交換器3Bが休止した容量制御運転中に室
外側熱交換器3Aに付着した霜を除去する場合について説
明したが、室外側熱交換器3Bが蒸発器として機能し、室
外側熱交換器3Aが休止した容量制御運転中に室外側熱交
換器3Bに付着した霜を除去する場合も上記と同様であ
る。The case where the outdoor heat exchanger 3A functions as an evaporator and the frost adhering to the outdoor heat exchanger 3A is removed during the capacity control operation in which the outdoor heat exchanger 3B is stopped has been described above. The same applies to the case where the outdoor heat exchanger 3B functions as an evaporator and the frost attached to the outdoor heat exchanger 3B is removed during the capacity control operation in which the outdoor heat exchanger 3A is stopped.
【００２７】[0027]
【発明の効果】本発明においては、暖房運転時、複数の
室外側熱交換器のうち一部を蒸発器として機能させ残部
を休止した容量制御運転中に一部の室外側熱交換器に着
霜したとき、室外側切換弁を切り換えることによって休
止中の残部の室外側熱交換器を蒸発器として機能させる
と同時に着霜した一部の室外側熱交換器の液側の室外側
電磁弁を閉とすることによりこの一部の室外側熱交換器
に圧縮機からの高温のガス冷媒を流入させて除霜するた
め、このデフロスト運転中も室内ユニットにより暖房を
継続できるので、暖房フィーリングの悪化を防止でき
る。According to the present invention, during the heating operation, some of the outdoor heat exchangers are attached to some of the outdoor heat exchangers during the capacity control operation in which a part of the outdoor heat exchangers functions as an evaporator and the rest is stopped. When it frosts, the rest of the outdoor heat exchanger in the rest state is made to function as an evaporator by switching the outdoor switching valve, and at the same time, the liquid side outdoor solenoid valve of a part of the frosted outdoor heat exchanger is turned on. By closing it, the hot gas refrigerant from the compressor flows into this part of the outdoor heat exchanger for defrosting, so heating can be continued by the indoor unit even during this defrost operation. It can prevent the deterioration.
【図１】本発明方法を実施す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 for carrying out the method of the present invention.
１ 圧縮機 10 吐出管 11 吸入管 Ｏ 室外ユニット 3A、3B 室外側熱交換器 Ａ、Ｂ、Ｃ 室内ユニット 7A、7B、7C 室内側熱交換器 12 液冷媒配管 2A、2B 室外側切換弁 8A、8B、8C 室内側切換弁 4A、4B 室外側絞り機構 6A、6B、6C 室内側絞り機構 19A 、19B 室外側電磁弁 1 Compressor 10 Discharge pipe 11 Suction pipe O Outdoor unit 3A, 3B Outdoor heat exchanger A, B, C Indoor unit 7A, 7B, 7C Indoor heat exchanger 12 Liquid refrigerant pipe 2A, 2B Outdoor switching valve 8A, 8B, 8C Indoor side switching valve 4A, 4B Outdoor side throttle mechanism 6A, 6B, 6C Indoor side throttle mechanism 19A, 19B Outdoor side solenoid valve
Claims (1)
れた吸入管と、上記圧縮機の吸込側に接続された吸入管
と、複数の室外側熱交換器と、上記複数の室外側熱交換
器のガス側をそれぞれ上記吐出管又は上記吸入管に選択
的に連通させる室外側切換弁と、上記複数の室外側熱交
換器の液側にそれぞれ配設された室外側絞り機構と、上
記室外側絞り機構の液側にそれぞれ配設された室外側電
磁弁と、複数の室内側熱交換器と、上記複数の室内側熱
交換器のガス側をそれぞれ上記吐出管又は上記吸入管に
選択的に連通させる室内側切換弁と、上記複数の室内側
熱交換器の液側にそれぞれ配設された室内側絞り機構
と、上記室内側絞り機構の液側と上記室外側電磁弁の液
側とを接続する液冷媒配管とを備え、冷房運転、暖房運
転、冷・暖房同時運転しうる空気調和機において、暖房
運転時、上記複数の室外側熱交換器のうち一部を蒸発器
として機能させ残部を休止した容量制御運転中に上記一
部の室外側熱交換器に着霜したとき、上記室外側切換弁
を切り換えることによって休止中の残部の室外側熱交換
器を蒸発器として機能させると同時に着霜した上記一部
の室外側熱交換器の液側の室外側電磁弁を閉とすること
によってこの一部の室外側熱交換器に圧縮機からの高温
ガス冷媒を流入させて除霜することを特徴とする空気調
和機の除霜方法。1. A compressor, a suction pipe connected to a discharge side of the compressor, a suction pipe connected to a suction side of the compressor, a plurality of outdoor heat exchangers, and the plurality of chambers. An outdoor-side switching valve that selectively communicates the gas side of the outer heat exchanger with the discharge pipe or the suction pipe; and an outdoor throttling mechanism provided on the liquid side of the plurality of outdoor heat exchangers, respectively. An outdoor solenoid valve respectively disposed on the liquid side of the outdoor throttle mechanism, a plurality of indoor heat exchangers, and gas sides of the plurality of indoor heat exchangers respectively as the discharge pipe or the suction pipe. An indoor side switching valve that selectively communicates with each other, an indoor side throttling mechanism respectively disposed on the liquid sides of the plurality of indoor side heat exchangers, a liquid side of the indoor side throttling mechanism, and the outdoor side solenoid valve. Equipped with liquid refrigerant piping that connects to the liquid side, cooling operation, heating operation, simultaneous cooling and heating operation In a possible air conditioner, during heating operation, frost is formed on some of the outdoor heat exchangers during capacity control operation in which a part of the plurality of outdoor heat exchangers functions as an evaporator and the rest is stopped. At this time, by switching the outdoor switching valve, the rest outdoor outdoor heat exchanger functions as an evaporator, and at the same time, frost is formed on the liquid outdoor outdoor solenoid valve of the partial outdoor heat exchanger. A defrosting method for an air conditioner, characterized in that the high temperature gas refrigerant from the compressor is caused to flow into the part of the outdoor heat exchangers by closing the defroster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14866593A JPH06337178A (en) | 1993-05-27 | 1993-05-27 | Defrosting method of air-conditioning machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14866593A JPH06337178A (en) | 1993-05-27 | 1993-05-27 | Defrosting method of air-conditioning machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06337178A true JPH06337178A (en) | 1994-12-06 |
Family
ID=15457886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14866593A Withdrawn JPH06337178A (en) | 1993-05-27 | 1993-05-27 | Defrosting method of air-conditioning machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06337178A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015059792A1 (en) * | 2013-10-24 | 2015-04-30 | 三菱電機株式会社 | Air conditioner |
-
1993
- 1993-05-27 JP JP14866593A patent/JPH06337178A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015059792A1 (en) * | 2013-10-24 | 2015-04-30 | 三菱電機株式会社 | Air conditioner |
| JP5992112B2 (en) * | 2013-10-24 | 2016-09-14 | 三菱電機株式会社 | Air conditioner |
| JPWO2015059792A1 (en) * | 2013-10-24 | 2017-03-09 | 三菱電機株式会社 | Air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000801 |