JP2723774B2 - Multi-room air conditioner - Google Patents
Multi-room air conditionerInfo
- Publication number
- JP2723774B2 JP2723774B2 JP5092866A JP9286693A JP2723774B2 JP 2723774 B2 JP2723774 B2 JP 2723774B2 JP 5092866 A JP5092866 A JP 5092866A JP 9286693 A JP9286693 A JP 9286693A JP 2723774 B2 JP2723774 B2 JP 2723774B2
- Authority
- JP
- Japan
- Prior art keywords
- way valve
- pressure side
- low
- pressure
- indoor
- 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 - Lifetime
Links
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は多室型空気調和機に係わ
り、特に各室内機毎に自由に冷暖房が選択可能な多室型
空気調和機の運転モード切り替えに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-room air conditioner, and more particularly to a switching operation mode of a multi-room air conditioner in which cooling and heating can be freely selected for each indoor unit.
【０００２】[0002]
【従来の技術】従来、この種の多室型空気調和機とし
て、例えば、特開平２−９３２６３号公報に掲載された
ものがある。2. Description of the Related Art Conventionally, as this kind of multi-room type air conditioner, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 2-93263.
【０００３】以下、図面を参照しながら上述した公報の
従来の多室型空気調和機について説明する。A conventional multi-room air conditioner disclosed in the above publication will be described below with reference to the drawings.
【０００４】図４において、１は多室型空気調和機の室
外機であり、圧縮機２、三方切替機構としての切換弁３
ａ，３ｂ、室外側熱交換器４、室外側膨張弁５、アキュ
ムレータ６から成っている。７は室内機であり、室内側
膨張弁８、室内側熱交換器９から成っている。１０は分
岐ユニットであり、高圧側二方弁１１、低圧側二方弁１
２、毛細管１３から成っている。In FIG . 4 , reference numeral 1 denotes an outdoor unit of a multi-room air conditioner, which includes a compressor 2 and a switching valve 3 as a three-way switching mechanism.
a, 3b, an outdoor heat exchanger 4, an outdoor expansion valve 5, and an accumulator 6. Reference numeral 7 denotes an indoor unit, which includes an indoor expansion valve 8 and an indoor heat exchanger 9. Reference numeral 10 denotes a branch unit, which includes a high-pressure side two-way valve 11 and a low-pressure side two-way valve 1
2. It consists of a capillary 13.
【０００５】そして室内側熱交換器９の一方は、高圧側
二方弁１１を介して室外機１の高圧側である吐出管１４
と室内機７を接続する高圧ガス管１５と連通するととも
に、低圧側二方弁１２を介して室外機１の低圧側である
圧縮機２の吸入側と連通したアキュムレータ６の吸入管
１６と室内機７を接続する低圧ガス管１７と連通してお
り、高圧側二方弁１１と低圧側二方弁１２の開閉によ
り、室内側熱交換器９の一方は、高圧ガス管１５または
低圧ガス管１７と切替可能に接続されている。One of the indoor heat exchangers 9 is connected to a discharge pipe 14 on the high pressure side of the outdoor unit 1 via a high pressure side two-way valve 11.
The suction pipe 16 of the accumulator 6 communicates with a high-pressure gas pipe 15 connecting the air conditioner and the indoor unit 7, and communicates with a suction side of the compressor 2, which is a low-pressure side of the outdoor unit 1, via a low-pressure two-way valve 12. The high-pressure two-way valve 11 and the low-pressure two-way valve 12 are opened and closed, and one of the indoor heat exchangers 9 is connected to the high-pressure gas pipe 15 or the low-pressure gas pipe 17. 17 and are switchably connected.
【０００６】また、低圧側二方弁１２と並行に、毛細管
１３を有したバイパス管１８が設けられている。A bypass pipe 18 having a capillary tube 13 is provided in parallel with the low-pressure side two-way valve 12.
【０００７】さらに室内側熱交換器９の他方は、室内側
膨張弁８を介して室外機１の液管部と液管１９で接続さ
れている。尚、室内機７は本従来例では３台接続されて
おり、区別する場合は添字ａ、ｂ、ｃを付けることにす
る。The other side of the indoor heat exchanger 9 is connected to a liquid pipe of the outdoor unit 1 via a liquid pipe 19 via an indoor expansion valve 8. Incidentally, three indoor units 7 are connected in the present conventional example, and suffixes a, b, and c will be added to distinguish them.
【０００８】次に上記構成の多室型空気調和機の動作に
ついて説明する。まず冷房運転のみの場合について説明
する。この場合の各弁の開閉状態は次の通りである。即
ち、切換弁３ａは開、切換弁３ｂは閉、高圧側二方弁１
１は閉、低圧側二方弁１２は開、各室内側膨張弁８は各
室内負荷に応じた開度である。Next, the operation of the multi-room air conditioner having the above configuration will be described. First, the case of only the cooling operation will be described. The open / close state of each valve in this case is as follows. That is, the switching valve 3a is opened, the switching valve 3b is closed, and the high-pressure side two-way valve 1 is opened.
1 is closed, the low-pressure side two-way valve 12 is open, and each indoor expansion valve 8 has an opening degree corresponding to each indoor load.
【０００９】圧縮機２より吐出された高温高圧ガスは、
切換弁３ａを介し室外側熱交換器４で凝縮液化され、室
外側膨張弁５を通って液管１９に導かれる。そして室内
側膨張弁８を通って各室内側熱交換器９に流入し、それ
ぞれ蒸発気化したあと、低圧側二方弁１２を経て低圧ガ
ス管１７に導かれる。その後アキュムレータ６を通って
圧縮機２に戻り、冷房運転を行なう。The high-temperature and high-pressure gas discharged from the compressor 2 is
The condensed liquid is condensed and liquefied in the outdoor heat exchanger 4 via the switching valve 3a, and is guided to the liquid pipe 19 through the outdoor expansion valve 5. Then, it flows into each indoor heat exchanger 9 through the indoor expansion valve 8, evaporates and evaporates, and is led to the low pressure gas pipe 17 through the low pressure side two-way valve 12. Thereafter, the compressor 2 returns to the compressor 2 through the accumulator 6, and performs a cooling operation.
【００１０】次に暖房運転のみの場合について説明す
る。この場合の各弁の開閉状態は次の通りである。即
ち、切換弁３ａは閉、切換弁３ｂは開、高圧側二方弁１
１は開、低圧側二方弁１２は閉、各室内側膨張弁８は各
室内負荷に応じた開度である。Next, the case of only the heating operation will be described. The open / close state of each valve in this case is as follows. That is, the switching valve 3a is closed, the switching valve 3b is open, and the high-pressure side two-way valve 1 is opened.
1 is open, the low-pressure side two-way valve 12 is closed, and each indoor expansion valve 8 has an opening degree corresponding to each indoor load.
【００１１】圧縮機２より吐出された冷媒は、高圧ガス
管１５、高圧側二方弁１１を介して各室内側熱交換器９
に導かれ、ここで凝縮液化して室内側膨張弁８を介して
液管１９に流入し、室外側膨張弁５で低圧二相状態まで
減圧され、室外側熱交換器４に入り蒸発気化して切換弁
３ｂを介しアキュムレータ６を通って圧縮機２に戻り、
暖房運転を行なう。The refrigerant discharged from the compressor 2 passes through the high-pressure gas pipe 15 and the high-pressure two-way valve 11 to each indoor heat exchanger 9.
, Where it is condensed and liquefied, flows into the liquid pipe 19 via the indoor expansion valve 8, is decompressed to a low-pressure two-phase state by the outdoor expansion valve 5, enters the outdoor heat exchanger 4, and evaporates. And returns to the compressor 2 through the accumulator 6 via the switching valve 3b,
Perform heating operation.
【００１２】次に冷房主体運転の場合について説明す
る。ここで各室内機７の運転状態は、室内機７ａ，７ｂ
…冷房、室内機７ｃ…暖房とし、各弁の開閉状態は次の
通りである。即ち、切換弁３ａは開、切換弁３ｂは閉、
高圧側二方弁１１ａ，１１ｂは閉、高圧側二方弁１１ｃ
は開、低圧側二方弁１２ａ，１２ｂは開、低圧側二方弁
１２ｃは閉、各室内側膨張弁８は各室内負荷に応じた開
度である。Next, the case of the cooling main operation will be described. Here, the operation state of each indoor unit 7 is determined by the indoor units 7a and 7b.
... cooling, indoor unit 7c ... heating, and the open / close state of each valve is as follows. That is, the switching valve 3a is open, the switching valve 3b is closed,
The high-pressure side two-way valves 11a and 11b are closed, and the high-pressure side two-way valve 11c
Is open, the low-pressure side two-way valves 12a and 12b are open, the low-pressure side two-way valve 12c is closed, and each indoor expansion valve 8 has an opening degree corresponding to each indoor load.
【００１３】圧縮機２より吐出された冷媒の一部は、切
換弁３ａを介し室外側熱交換器４で凝縮液化され、室外
側膨張弁５を通って液管１９に導かれる。また残りの冷
媒は、高圧ガス管１５、高圧側二方弁１１ｃを介して室
内側熱交換器７ｃに導かれ、ここで凝縮液化して室内側
膨張弁８ｃを介して液管１９に流入し、室外側熱交換器
４を通ってきた冷媒と合流する。そして室内側膨張弁８
ａ，８ｂを通って室内側熱交換器９ａ，９ｂに流入し、
それぞれ蒸発気化したあと、低圧側二方弁１２ａ，１２
ｂを経てアキュムレータ６を介して圧縮機２に戻り、冷
房主体運転を行なう。A part of the refrigerant discharged from the compressor 2 is condensed and liquefied in the outdoor heat exchanger 4 through the switching valve 3a, and guided to the liquid pipe 19 through the outdoor expansion valve 5. The remaining refrigerant is guided to the indoor heat exchanger 7c through the high-pressure gas pipe 15 and the high-pressure two-way valve 11c, where it is condensed and liquefied and flows into the liquid pipe 19 through the indoor expansion valve 8c. Merges with the refrigerant that has passed through the outdoor heat exchanger 4. And the indoor expansion valve 8
a, 8b, flows into the indoor heat exchangers 9a, 9b,
After each vaporization, the low-pressure side two-way valves 12a, 12a
Returning to the compressor 2 via the accumulator 6 via b, the cooling main operation is performed.
【００１４】次に暖房主体運転の場合について説明す
る。ここで各室内機７の運転状態は、室内機７ａ，７ｂ
…暖房、室内機７ｃ…冷房とし、各弁の開閉状態は次の
通りである。即ち、切換弁３ａは閉、切換弁３ｂは開、
高圧側二方弁１１ａ，１１ｂは開、高圧側二方弁１１ｃ
は閉、低圧側二方弁１２ａ，１２ｂは閉、低圧側二方弁
１２ｃは開、各室内側膨張弁８は各室内負荷に応じた開
度である。Next, the case of the heating main operation will be described. Here, the operation state of each indoor unit 7 is determined by the indoor units 7a and 7b.
... heating, indoor unit 7c ... cooling, and the open / closed state of each valve is as follows. That is, the switching valve 3a is closed, the switching valve 3b is open,
The high-pressure side two-way valves 11a and 11b are open, and the high-pressure side two-way valve 11c
Is closed, the low-pressure side two-way valves 12a and 12b are closed, the low-pressure side two-way valve 12c is open, and each indoor expansion valve 8 has an opening degree corresponding to each indoor load.
【００１５】圧縮機２より吐出された冷媒は、高圧ガス
管１５、高圧側二方弁１１ａ，１１ｂを介して室内側熱
交換器９ａ，９ｂに導かれ、ここで凝縮液化して室内側
膨張弁８ａ，８ｂを介して液管１９に流入する。液管１
９の冷媒の一部は、室内側膨張弁８ｃを通って室内側熱
交換器９ｃに流入し蒸発気化したあと、低圧側二方弁１
２ｃを介して低圧ガス管１７を経てアキュムレータ６を
介して圧縮機２に戻り、冷房運転を行なう。液管１９の
残りの冷媒は、室外側膨張弁５で低圧二相状態まで減圧
され室外側熱交換器４に入り蒸発気化して、切換弁３ｂ
を介しアキュムレータ６を通って圧縮機２に戻り、暖房
主体運転を行なう。The refrigerant discharged from the compressor 2 is guided to the indoor heat exchangers 9a and 9b via the high-pressure gas pipe 15 and the high-pressure two-way valves 11a and 11b, where it is condensed and liquefied and expanded indoors. The liquid flows into the liquid pipe 19 via the valves 8a and 8b. Liquid tube 1
Part of the refrigerant 9 flows into the indoor heat exchanger 9c through the indoor expansion valve 8c and evaporates, and then the low pressure two-way valve 1
Returning to the compressor 2 via the accumulator 6 via the low-pressure gas pipe 17 via 2c, the cooling operation is performed. The remaining refrigerant in the liquid pipe 19 is reduced in pressure to the low-pressure two-phase state by the outdoor expansion valve 5, enters the outdoor heat exchanger 4, evaporates and evaporates, and is switched to the switching valve 3b.
And returns to the compressor 2 through the accumulator 6 to perform the heating main operation.
【００１６】次に室内機７の運転モードが変更された場
合の動作について、室内機７ａが暖房から冷房に切り替
わる場合を例にとり説明する。Next, the operation when the operation mode of the indoor unit 7 is changed will be described by taking as an example the case where the indoor unit 7a switches from heating to cooling.
【００１７】室内機７ａが暖房運転中は、高圧側二方弁
１１ａは開、低圧側二方弁１２ａは閉、室内側膨張弁８
ａは室内負荷に応じた開度であるが、冷房運転への変更
信号があると、高圧側二方弁１１ａは閉、低圧側二方弁
１２ａは閉、室内側膨張弁８ａは閉の状態に制御され
る。During the heating operation of the indoor unit 7a, the high-pressure side two-way valve 11a is open, the low-pressure side two-way valve 12a is closed, and the indoor side expansion valve 8
a is an opening degree corresponding to the indoor load, but when there is a change signal to the cooling operation, the high-pressure side two-way valve 11a is closed, the low-pressure side two-way valve 12a is closed, and the indoor side expansion valve 8a is closed. Is controlled.
【００１８】すると、室内熱交換器９ａ内の高圧冷媒は
圧力差により毛細管１３ａを介して低圧ガス管１７に流
出するとともに、室内熱交換器９ａ内の圧力が低下す
る。そしてその後、低圧側二方弁１２ａを開状態にする
と、低圧側二方弁１２ａが開くときの冷媒音の発生が防
止されるとともに、室内側熱交換器９ａから流出する冷
媒の配管流動音も防止される。Then, the high-pressure refrigerant in the indoor heat exchanger 9a flows out to the low-pressure gas pipe 17 through the capillary tube 13a due to the pressure difference, and the pressure in the indoor heat exchanger 9a decreases. After that, when the low-pressure side two-way valve 12a is opened, generation of the refrigerant noise when the low-pressure side two-way valve 12a is opened is prevented, and the pipe flow noise of the refrigerant flowing out of the indoor heat exchanger 9a is also reduced. Is prevented.
【００１９】[0019]
【発明が解決しようとする課題】しかしながら上記のよ
うな構成では、室内機７の運転モードの切替時に発生す
る冷媒流動音を防止するために、低圧側二方弁１２と並
行に毛細管１３を有したバイパス管１８が必要であり、
部品点数や工数が増加し高価になるという課題を有して
いた。However, in the above configuration, in order to prevent the refrigerant flow noise generated when the operation mode of the indoor unit 7 is switched, the capillary 13 is provided in parallel with the low-pressure side two-way valve 12. Requires a bypass pipe 18
There has been a problem that the number of parts and man-hours increase and the cost increases.
【００２０】また、室内機７が暖房運転中は、この毛細
管１３を介して高温高圧の冷媒が低圧側に漏れることに
なり、性能低下をもたらすという課題も有していた。In addition, during the heating operation of the indoor unit 7, the high-temperature and high-pressure refrigerant leaks to the low-pressure side through the capillary tube 13, which causes a problem that the performance is reduced.
【００２１】本発明は上記従来の課題を解決するもの
で、シンプルかつ安価な仕様で室内機の運転モードの切
替時に発生する冷媒流動音を防止するとともに、暖房時
の性能低下を防止できる多室型空気調和機を提供するこ
とを目的とする。The present invention solves the above-mentioned conventional problems, and has a simple and inexpensive specification that can prevent the refrigerant flow noise generated when the operation mode of the indoor unit is switched and can prevent the performance degradation during heating. It is intended to provide a type air conditioner.
【００２２】[0022]
【課題を解決するための手段】上記課題を解決するため
に本発明は、低圧側二方弁を閉路させた一定時間後に高
圧側二方弁を開路、または高圧側二方弁を閉路させた一
定時間後に低圧側二方弁を開路させるとともに、一方の
二方弁の閉路から他方の二方弁の開路までの期間、室内
側膨張弁を全閉、室外側ファンを強風運転または停止と
する制御を行うようにしたものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a high-pressure side two-way valve is opened or a high-pressure side two-way valve is closed after a fixed time after the low-pressure side two-way valve is closed. After a certain period of time, the low-pressure side two-way valve is opened, and during the period from the closing of one two-way valve to the opening of the other two-way valve, the indoor expansion valve is fully closed, and the outdoor fan is set to strong wind operation or stop. The control is performed.
【００２３】[0023]
【作用】本発明は、室内機運転モードが冷房から暖房に
変更された場合は、低圧側二方弁を閉路させた後に室内
側膨張弁を全閉、室外側ファンを冷房運転または冷房主
体運転の場合には強風運転、暖房運転または暖房主体運
転の場合には停止とし一定時間経過させる事により、冷
房または冷房主体運転の場合には室外側熱交換器による
凝縮能力を増加、暖房または暖房主体運転時には室外側
熱交換器による蒸発能力を減少させ、高圧ガス管内の圧
力を下降させ、高圧側二方弁前後の圧力差を小さくした
後に高圧側二方弁を開路させ、室内機運転モードが暖房
から冷房に変更された場合は、高圧側二方弁を閉路させ
た後に室内側膨張弁を全閉、室外側ファンを冷房運転ま
たは冷房主体運転の場合には停止、暖房運転または暖房
主体運転の場合には強風運転とし一定時間経過させる事
により、冷房または冷房主体運転時には室外側熱交換器
による凝縮能力を減少、暖房または暖房主体運転時には
室外側熱交換器による蒸発能力を増加させ、低圧ガス管
内の圧力を上昇させ、低圧側二方弁前後の圧力差を小さ
くした後に低圧側二方弁を開路させ、冷媒流動音の発生
を防止するものであり、また、暖房時に高温高圧冷媒が
低圧ガス管に漏れる事による暖房能力の低下を防止する
ものである。According to the present invention, when the indoor unit operation mode is changed from cooling to heating, the indoor expansion valve is fully closed after the low pressure side two-way valve is closed, and the outdoor fan is operated in cooling operation or cooling main operation. In the case of (1), stop in the case of strong wind operation, heating operation or heating main operation and stop for a certain period of time, and in the case of cooling or cooling main operation, increase the condensation capacity of the outdoor heat exchanger, and perform heating or heating main operation. During operation, the evaporation capacity of the outdoor heat exchanger is reduced, the pressure in the high-pressure gas pipe is reduced, the pressure difference between the front and rear of the high-pressure side two-way valve is reduced, and then the high-pressure side two-way valve is opened. When switching from heating to cooling, the high-pressure side two-way valve is closed, then the indoor expansion valve is fully closed, and the outdoor fan is stopped in cooling or cooling-main operation, and heating or heating-main operation is performed. In the case of When a certain period of time elapses with strong wind operation, the cooling capacity of the outdoor heat exchanger is reduced during cooling or cooling main operation, and the evaporation capacity of the outdoor heat exchanger is increased during heating or heating main operation, and the pressure in the low-pressure gas pipe is increased. After reducing the pressure difference between the low-pressure side two-way valve and the low-pressure side two-way valve, the low-pressure side two-way valve is opened to prevent the generation of refrigerant flow noise. This prevents a decrease in heating capacity due to leakage.
【００２４】[0024]
【実施例】以下本発明の一実施例について図面を参照し
ながら説明する。尚、従来と同一部分については同一符
号を付しその詳細な説明を省略する。An embodiment of the present invention will be described below with reference to the drawings. The same parts as those in the related art are denoted by the same reference numerals, and detailed description thereof will be omitted.
【００２５】図１において、２１は高圧側二方弁１１の
開閉動作を制御する高圧側二方弁制御手段であり、図２
に示すように室内機７の運転モード変更信号が入ってＴ
１後に高圧側二方弁１１を開路するように設定されてい
る。In FIG . 1, reference numeral 21 denotes high-pressure side two-way valve control means for controlling the opening / closing operation of the high-pressure side two-way valve 11.
When the operation mode change signal of the indoor unit 7 is input as shown in FIG.
The high pressure side two-way valve 11 is set to be opened after one.
【００２６】また、２２は低圧側二方弁１２の開閉動作
を制御する低圧側二方弁制御手段であり、図３に示すよ
うに室内機７の運転モード変更信号が入ってT1後に低圧
側二方弁１２を開路するように設定されている。Further, 22 is a low-pressure side two-way valve control means for controlling the opening and closing operation of the low-pressure side two-way valve 12, a low pressure after T 1 enters the operation mode change signal of the indoor unit 7 as shown in FIG. 3 The side two-way valve 12 is set to open.
【００２７】また、２３は室内側膨張弁８の開閉動作を
制御する室内側膨張弁制御手段であり、図２，図３に示
すように室内機７の運転モード変更信号が入るとＴ１時
間全閉とするように設定されている。Reference numeral 23 denotes an indoor expansion valve control means for controlling the opening / closing operation of the indoor expansion valve 8. As shown in FIG. 2 and FIG. It is set to be closed.
【００２８】また、２４は室外側ファン２０の運転状態
を制御する室外側ファン制御手段であり、図２に示すよ
うに室内機７の冷房から暖房の運転モード変更信号が入
ると、冷房または冷房主体運転の場合にはＴ１時間強風
運転、暖房または暖房主体運転の場合にはＴ１時間停
止、また図３に示すように室内機７の暖房から冷房の運
転モード変更信号が入ると、冷房または冷房主体運転の
場合にはＴ１時間停止、暖房または暖房主体運転の場合
にはＴ１時間強風運転とするように設定されている。Reference numeral 24 denotes outdoor fan control means for controlling the operation state of the outdoor fan 20. As shown in FIG. 2, when an operation mode change signal for heating from the cooling of the indoor unit 7 is input, cooling or cooling is performed. In the case of the main operation, the strong wind operation is performed for the T1 time, and in the case of the heating or heating main operation, the operation is stopped for the T1 time. When the operation mode change signal of the cooling from the heating of the indoor unit 7 is input as shown in FIG. The main operation is set to stop for the T1 time, and the heating or the heating main operation is set to the strong wind operation for the T1 time.
【００２９】次に、このような構成においての動作につ
いて説明する。尚、各運転モードによる冷媒の流れは従
来例と同様であるのでその詳細な説明は省略する。Next, the operation in such a configuration will be described. Note that the flow of the refrigerant in each operation mode is the same as that of the conventional example, and a detailed description thereof will be omitted.
【００３０】まず冷房中の室内機７が暖房に変更される
場合について図２を用いて説明する。変更信号が入る
と、低圧側二方弁１２は閉となり、室内側膨張弁８は全
閉、室外側ファン２０は冷房運転または冷房主体運転の
場合にはT1時間（例えば３分）強風運転、暖房運転また
は暖房主体運転の場合にはＴ１時間停止とし、変更信号
からT1時間後高圧側二方弁１１を開とする。First, the case where the indoor unit 7 during cooling is changed to heating will be described with reference to FIG. When the change signal enters the low pressure side two-way valve 12 is closed, the indoor expansion valve 8 is fully closed, the outdoor side fan 20 in the case of the cooling operation or cooling-main operation time T 1 (e.g., 3 minutes) winds operation , in the case of heating operation or heating-main operation is a stop time T1, the time T 1 after the high-pressure side two-way valve 11 and opens the change signal.
【００３１】従って、Ｔ１の間に、冷房または冷房主体
運転の場合は室外側熱交換器による凝縮能力の増加、暖
房または暖房主体運転の場合は室外熱側交換器による蒸
発能力の減少により、高圧ガス１５管内の圧力が下降
し、高圧側二方弁１１前後の圧力差がある程度小さくな
ってから高圧側二方弁１１を開路させるので、圧力差に
よる冷媒流動音の発生を防止することができる。Accordingly, during the period T1, the cooling capacity or the cooling main operation is increased, and the condensing capacity by the outdoor heat exchanger is increased. In the heating or heating main operation, the evaporation capacity is reduced by the outdoor heat side exchanger. Since the pressure in the gas 15 pipe decreases and the pressure difference between the front and rear of the high-pressure side two-way valve 11 decreases to some extent, the high-pressure side two-way valve 11 is opened, so that generation of refrigerant flow noise due to the pressure difference can be prevented. .
【００３２】次に暖房中の室内機７が冷房に変更される
場合について図３を用いて説明する。変更信号が入る
と、高圧側二方弁１１は閉となり、室内側膨張弁８は全
閉状態、室外側ファン２０は冷房運転または冷房主体運
転の場合にはＴ１時間（例えば３分）停止、暖房運転ま
たは暖房主体運転の場合にはT1時間強風運転とし、変更
信号からＴ１時間後低圧側二方弁１２を開状態とする。Next, a case where the indoor unit 7 being heated is changed to cooling will be described with reference to FIG. When the change signal is input, the high-pressure side two-way valve 11 is closed, the indoor expansion valve 8 is fully closed, and the outdoor fan 20 is stopped for T1 time (for example, 3 minutes) in the cooling operation or the cooling main operation, in the case of heating operation or heating-main operation is the time T 1 winds operation, the after T1 time low-pressure side two-way valve 12 in the open state from the change signal.
【００３３】従って、Ｔ１の間に、冷房または冷房主体
運転の場合は室外側熱交換器による蒸発能力の増加、暖
房または暖房主体運転の場合は室外側熱交換器による凝
縮能力の減少により、低圧ガス１７管内の圧力が上昇
し、低圧側二方弁１２前後の圧力差がある程度小さくな
ってから高圧側二方弁１１を開路させるので、圧力差に
よる冷媒流動音の発生を防止することができる。Therefore, during the period T1, low-pressure operation is performed due to an increase in the evaporation capacity of the outdoor heat exchanger in the cooling or cooling main operation and a decrease in the condensation capacity of the outdoor heat exchanger in the heating or heating main operation. Since the pressure in the gas 17 pipe increases and the pressure difference between the low pressure side two-way valve 12 and the low pressure side two-way valve 12 decreases to some extent, the high pressure side two-way valve 11 is opened, so that the refrigerant flow noise due to the pressure difference can be prevented. .
【００３４】また、室内機７が暖房中は低圧側二方弁１
２が閉路しているので、従来のように高温高圧冷媒が低
圧ガス管１７に漏れることがなく、性能の低下も防止す
ることができる。When the indoor unit 7 is heating, the low-pressure side two-way valve 1 is
Since the circuit 2 is closed, the high-temperature and high-pressure refrigerant does not leak into the low-pressure gas pipe 17 unlike the related art, and a decrease in performance can be prevented.
【００３５】以上のように、室内機７の運転モードの切
替時に高圧側または低圧側二方弁前後の圧力差を小さく
して圧力差により発生する冷媒流動音を防止するととも
に、高温高圧冷媒が低圧ガス管１７に漏れることによる
暖房時の性能低下を防止することができる。As described above, when the operation mode of the indoor unit 7 is switched, the pressure difference between the high pressure side and the low pressure side two-way valve is reduced to prevent the refrigerant flow noise generated by the pressure difference, It is possible to prevent performance degradation during heating due to leakage into the low-pressure gas pipe 17.
【００３６】[0036]
【発明の効果】以上のように本発明は、低圧側二方弁を
閉路させた一定時間後に高圧側二方弁を開路、または高
圧側二方弁を閉路させた一定時間後に低圧側二方弁を開
路させるとともに、一方の二方弁の閉路から他方の二方
弁の開路までの期間、室内側膨張弁を全閉し、冷房運転
または冷房主体運転時に前記低圧側二方弁の閉路から前
記高圧側二方弁の開路まで前記室外側ファンを強風運転
し、冷房運転または冷房主体運転時に前記高圧側二方弁
の閉路から前記低圧側二方弁の開路まで前記室外側ファ
ンを停止し、暖房運転または暖房主体運転時に前記低圧
側二方弁の閉路から前記高圧側二方弁の開路まで前記室
外側ファンを停止し、暖房運転または暖房主体運転時に
前記高圧側二方弁の閉路から前記低圧側二方弁の開路ま
で前記室外側ファンを強風運転する制御を行うようにし
たものである。As described above, according to the present invention, the high-pressure side two-way valve is opened after a certain time after the low-pressure side two-way valve is closed, or the low-pressure side two-way valve after a certain time after the high-pressure side two-way valve is closed. While opening the valve, during the period from the closing of one two-way valve to the opening of the other two-way valve, fully close the indoor expansion valve, from the closed state of the low-pressure side two-way valve during cooling operation or cooling main operation. Strong wind operation of the outdoor fan until the high-pressure side two-way valve is opened, and stops the outdoor fan from closing the high-pressure two-way valve to opening the low-pressure two-way valve during cooling operation or cooling main operation. During the heating operation or the heating main operation, the outdoor fan is stopped from the closing of the low-pressure side two-way valve to the opening of the high-pressure side two-way valve, and from the closing of the high-pressure side two-way valve during the heating operation or the heating main operation. Until the low pressure side two-way valve is opened, The is obtained to perform the control to drive strong wind.
【００３７】そのため、室内機の運転モードの切替時
に、高圧側または低圧側二方弁前後の圧力差を小さくし
て圧力差により発生する冷媒流動音を防止するととも
に、高温高圧冷媒が低圧ガス管に漏れることによる暖房
時の性能低下を防止することができる。Therefore, when the operation mode of the indoor unit is switched, the pressure difference between the high-pressure side and the low-pressure side two-way valve is reduced to prevent the refrigerant flow noise generated by the pressure difference, and the high-temperature high-pressure refrigerant is supplied to the low-pressure gas pipe. Can be prevented from deteriorating during heating due to leakage to the air.
【図１】本発明の一実施例における多室型空気調和機の
冷凍サイクル図FIG. 1 is a refrigeration cycle diagram of a multi-room air conditioner according to an embodiment of the present invention.
【図２】同実施例の構成要素の室内機が冷房から暖房に
切り替わる場合の時間変化に対する動作を示したタイミ
ングチャートFIG. 2 is a timing chart showing an operation with respect to a time change when an indoor unit of the embodiment switches from cooling to heating.
【図３】同実施例の構成要素の室内機が暖房から冷房に
切り替わる場合の時間変化に対する動作を示したタイミ
ングチャートFIG. 3 is a timing chart showing an operation with respect to a time change when the indoor unit of the embodiment switches from heating to cooling.
【図４】従来の多室型空気調和機の冷凍サイクル図FIG. 4 is a refrigeration cycle diagram of a conventional multi-room air conditioner.
１ 室外機 ２ 圧縮機 ３ａ，３ｂ 三方弁 ４ 室外側熱交換器 ５ 室外側膨張弁 ７ 室内機 ８ 室内側膨張弁 ９ 室内側熱交換器 １１ 高圧側二方弁 １２ 低圧側二方弁 １５ 高圧ガス管 １７ 低圧ガス管 １９ 液管 ２０ 室外側ファン ２１ 高圧側二方弁制御手段 ２２ 低圧側二方弁制御手段 ２３ 室内側膨張弁制御手段 ２４ 室外側ファン制御手段 DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Compressor 3a, 3b Three-way valve 4 Outdoor heat exchanger 5 Outdoor expansion valve 7 Indoor unit 8 Indoor expansion valve 9 Indoor heat exchanger 11 High pressure side two-way valve 12 Low pressure side two-way valve 15 High pressure Gas pipe 17 Low pressure gas pipe 19 Liquid pipe 20 Outdoor fan 21 High pressure side two-way valve control means 22 Low pressure side two-way valve control means 23 Indoor side expansion valve control means 24 Outdoor side fan control means
Claims (1)
器、室外側膨張弁、室外側ファンから成る室外機と、室
内側膨張弁、室内側熱交換器から成る複数の室内機を高
圧ガス管、低圧ガス管及び液管を介して並列に接続し、
前記室内側熱交換器の一方は前記高圧ガス管または前記
低圧ガス管と高圧側二方弁及び低圧側二方弁の開閉によ
り切替可能に接続し、前記室内側熱交換器の他の一方は
室内側膨張弁を介して前記液管に接続し、前記低圧側二
方弁を閉路させた一定時間後に前記高圧側二方弁を開
路、または前記高圧側二方弁を閉路させた一定時間後に
前記低圧側二方弁を開路させる二方弁制御手段を有する
とともに、一方の二方弁の閉路から他方の二方弁の開路
までの期間に前記室内側膨張弁を全閉とする室内側膨張
弁制御手段及び冷房運転または冷房主体運転時に前記低
圧側二方弁の閉路から前記高圧側二方弁の開路まで前記
室外側ファンを強風運転し、冷房運転または冷房主体運
転時に前記高圧側二方弁の閉路から前記低圧側二方弁の
開路まで前記室外側ファンを停止し、暖房運転または暖
房主体運転時に前記低圧側二方弁の閉路から前記高圧側
二方弁の開路まで前記室外側ファンを停止し、暖房運転
または暖房主体運転時に前記高圧側二方弁の閉路から前
記低圧側二方弁の開路まで前記室外側ファンを強風運転
する停止室外側ファン制御手段を有する多室型空気調和
機。1. An outdoor unit comprising a compressor, a three-way switching mechanism, an outdoor heat exchanger, an outdoor expansion valve and an outdoor fan, and a plurality of indoor units comprising an indoor expansion valve and an indoor heat exchanger are supplied with high pressure. Connected in parallel via gas pipe, low pressure gas pipe and liquid pipe,
One of the indoor heat exchangers is switchably connected to the high-pressure gas pipe or the low-pressure gas pipe by opening and closing a high-pressure two-way valve and a low-pressure side two-way valve, and the other one of the indoor-side heat exchanger is Connected to the liquid pipe via an indoor expansion valve, the high pressure side two-way valve is opened after a certain time after the low pressure side two-way valve is closed, or after a certain time after the high pressure side two-way valve is closed. Indoor-side expansion which has a two-way valve control means for opening the low-pressure side two-way valve and fully closes the indoor-side expansion valve during a period from the closing of one two-way valve to the opening of the other two-way valve; Valve control means and the outdoor fan performs a strong wind operation from the closing of the low-pressure side two-way valve to the opening of the high-pressure side two-way valve during the cooling operation or the cooling main operation, and the high-pressure side two-way during the cooling operation or the cooling main operation. The outdoor side from the closing of the valve to the opening of the low-pressure side two-way valve And stopping the outdoor fan from the closing of the low-pressure side two-way valve to the opening of the high-pressure side two-way valve during the heating operation or the heating main operation. A multi-room air conditioner having stop outdoor fan control means for operating the outdoor fan in a strong wind from the closing of the direction valve to the opening of the low-pressure side two-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5092866A JP2723774B2 (en) | 1993-04-20 | 1993-04-20 | Multi-room air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5092866A JP2723774B2 (en) | 1993-04-20 | 1993-04-20 | Multi-room air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06300380A JPH06300380A (en) | 1994-10-28 |
| JP2723774B2 true JP2723774B2 (en) | 1998-03-09 |
Family
ID=14066360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5092866A Expired - Lifetime JP2723774B2 (en) | 1993-04-20 | 1993-04-20 | Multi-room air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2723774B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060029566A (en) * | 2004-10-02 | 2006-04-06 | 삼성전자주식회사 | Air condirioner and method of controlling the same |
| JP6314294B1 (en) * | 2018-02-01 | 2018-04-18 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
| JP6290492B1 (en) * | 2017-04-28 | 2018-03-07 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
| CN108413586B (en) * | 2018-01-22 | 2020-02-21 | 宁波奥克斯电气股份有限公司 | Multi-split air conditioner noise reduction control method and multi-split air conditioner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2954259B2 (en) * | 1990-03-09 | 1999-09-27 | 株式会社日立製作所 | Air conditioner |
-
1993
- 1993-04-20 JP JP5092866A patent/JP2723774B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06300380A (en) | 1994-10-28 |
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