JPH01167561A - Multi-room type air-conditioning equipment - Google Patents
Multi-room type air-conditioning equipmentInfo
- Publication number
- JPH01167561A JPH01167561A JP62324493A JP32449387A JPH01167561A JP H01167561 A JPH01167561 A JP H01167561A JP 62324493 A JP62324493 A JP 62324493A JP 32449387 A JP32449387 A JP 32449387A JP H01167561 A JPH01167561 A JP H01167561A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- heat exchanger
- pipe
- pressure gas
- 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.)
- Granted
Links
- 238000004378 air conditioning Methods 0.000 title claims description 12
- 239000003507 refrigerant Substances 0.000 claims abstract description 99
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 239000003638 chemical reducing agent Substances 0.000 claims description 30
- 238000001816 cooling Methods 0.000 abstract description 27
- 238000010792 warming Methods 0.000 abstract 8
- 239000007789 gas Substances 0.000 description 39
- 238000010438 heat treatment Methods 0.000 description 27
- ZWTYUDFYRAHEEY-UHFFFAOYSA-N [3-(2,6-dichlorobenzoyl)oxyphenyl]boronic acid Chemical compound OB(O)C1=CC=CC(OC(=O)C=2C(=CC=CC=2Cl)Cl)=C1 ZWTYUDFYRAHEEY-UHFFFAOYSA-N 0.000 description 23
- 230000008020 evaporation Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は１台の室外ユニットと複数台の室内ユニットと
から構成され、複数室の全てを同時に冷房又は暖房し、
且つ同時に任意の室を冷房し他室を暖房する多室型冷暖
房装置に関する。DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention is composed of one outdoor unit and a plurality of indoor units, and cools or heats all of the plurality of rooms at the same time.
The present invention also relates to a multi-room air conditioning system that cools any room and heats other rooms at the same time.
（ロ）従来の技術
複数室の全てを同時に冷房又は暖房でさ、且つ同時に複
数室の一室を冷房し他室を暖房できる多室型冷暖房装置
が特公昭５２−２４７１０号公報、特公昭５２−２４７
１１号公報、実公昭５４−３０２０号公報で提示されて
いる。(B) Prior art A multi-room air-conditioning system that can cool or heat all of multiple rooms at the same time and simultaneously cool one room and heat the other rooms is disclosed in Japanese Patent Publication No. 52-24710. -247
This is disclosed in Publication No. 11 and Japanese Utility Model Publication No. 54-3020.
（ハ）発明が解決しようとする問題点
上記の特公昭５２−２４７１０号公報及び特公昭５２−
２４７１１号公報で提示の装置では室内ユニットの数だ
け四方切換弁と室外熱交換器を必要とするため配管回路
構成が複雑になると共に製造コストが高くつき、且つ各
室内ユニットごとに２本のユニット間配管を室外ユニッ
トから引き出さなければならないため、ユニット間配管
の本数が多くなり配管工事が面倒である欠点を有してい
た、しかも同時に一室を冷房、他室を暖房する冷暖房運
転時、各室内ユニットと対応する室外熱交換器が凝縮器
及び蒸発器として夫々作用して屋外に熱を捨てており、
熱回収できない難点があった。(c) Problems to be solved by the invention The above-mentioned Japanese Patent Publication Nos. 52-24710 and 1983-
The device presented in Publication No. 24711 requires as many four-way switching valves and outdoor heat exchangers as there are indoor units, which complicates the piping circuit configuration, increases manufacturing costs, and requires two units for each indoor unit. Since the inter-unit pipes have to be drawn out from the outdoor unit, the number of inter-unit pipes increases and the piping work is troublesome. The indoor unit and the corresponding outdoor heat exchanger function as a condenser and an evaporator, respectively, discharging heat outdoors.
The problem was that heat could not be recovered.
又、上記の実公昭５４−３０２０号公報で提示の装置で
は同時に複数室の成る室を冷房し他室を暖房する冷暖房
運転時、冷房できる室と暖房できる室との組み合わせが
決まっており、冷暖房運転を各室で自由に選択して行な
うことができず、使用勝手が悪い欠点を有していた。Furthermore, in the device disclosed in the above-mentioned Japanese Utility Model Publication No. 54-3020, during air-conditioning operation in which multiple rooms are cooled and other rooms are heated at the same time, the combination of rooms that can be cooled and rooms that can be heated is determined. It is not possible to freely select and perform operations in each room, which has the disadvantage of being inconvenient to use.
本発明は上述の問題点を解決した多室型冷暖房装置を提
供するものである。The present invention provides a multi-room air conditioning system that solves the above-mentioned problems.
（ニ）問題点を解決するための手段
本発明は室外熱交換器を圧縮機の冷媒吐出管と冷媒吸込
管とに切換弁を介して分岐接続する一方、１台の室外ユ
ニットと複数台の室内ユニットとを接続するユニット間
配管を圧縮機の冷媒吐出管と分岐接続された高圧ガス管
と、圧縮機の冷媒吸込管と分岐接続された低圧ガス管と
、室外熱交換器と接続された液管とで構成して、各室内
ユニットの室内熱交換器を高圧ガス管と低圧ガス管とに
は切換弁を介して分岐接続すると共に液管には冷媒減圧
器を介して接続するようにしたものである。(d) Means for Solving the Problems The present invention connects the outdoor heat exchanger to the refrigerant discharge pipe and the refrigerant suction pipe of the compressor via a switching valve, and connects one outdoor unit and a plurality of The inter-unit piping that connects the indoor unit is connected to a high-pressure gas pipe that is branch-connected to the compressor's refrigerant discharge pipe, a low-pressure gas pipe that is branch-connected to the compressor's refrigerant suction pipe, and an outdoor heat exchanger. The indoor heat exchanger of each indoor unit is branch-connected to the high-pressure gas pipe and low-pressure gas pipe via a switching valve, and the liquid pipe is connected via a refrigerant pressure reducer. This is what I did.
（ホ）作用
全室を同時に冷房する場合は、室外熱交換器の切換弁と
各室内熱交換器の切換弁とを冷房状態に設定することに
より、圧縮機から吐出された冷媒は吐出管より室外熱交
換器に流れてここで凝縮液化した後、液管を経て各室内
ユニットの冷媒減圧器に分配され、然る後、各室内熱交
換器で蒸発気化した後、低圧ガス管と冷媒吸込管とを順
次繰て圧縮機に吸入される。このように蒸発器として作
用する各室内熱交換器で全室が冷房される。(e) Effect When cooling all rooms at the same time, by setting the switching valve of the outdoor heat exchanger and the switching valve of each indoor heat exchanger to the cooling state, the refrigerant discharged from the compressor is routed through the discharge pipe. After flowing to the outdoor heat exchanger and condensing and liquefied there, it is distributed to the refrigerant pressure reducer of each indoor unit via liquid pipes, and then evaporated and vaporized in each indoor heat exchanger, and then transferred to the low-pressure gas pipe and refrigerant suction. It is sucked into the compressor through the pipes and pipes one after another. In this way, all rooms are cooled by each indoor heat exchanger acting as an evaporator.
又、全室を同時に暖房する場合は、室外熱交換器の切換
弁と各室内熱交換器の切換弁とを暖ｎ状態に設定するこ
とにより、圧縮機から吐出された冷媒は吐出管と高圧ガ
ス管とを順次繰て各室内熱交換器に分配されここで夫々
凝縮液化した後、各冷媒減圧器を経て液管で合流され、
然る後、室外熱交換器で蒸発気化した後、冷媒吸込管を
経て圧縮機に吸入される。このように凝縮器として作用
する各室内熱交換器で全室が暖房される。In addition, when heating all rooms at the same time, by setting the switching valve of the outdoor heat exchanger and the switching valve of each indoor heat exchanger to the warm state, the refrigerant discharged from the compressor is connected to the discharge pipe and high pressure. The gas pipes are sequentially distributed to each indoor heat exchanger, where the refrigerant is condensed and liquefied, and then passed through each refrigerant pressure reducer and merged in a liquid pipe.
Thereafter, the refrigerant is evaporated in an outdoor heat exchanger and then sucked into a compressor through a refrigerant suction pipe. In this way, all rooms are heated by each indoor heat exchanger acting as a condenser.
又、同時に任意の例えば二基を冷房し一室を暖房する場
合は、室外熱交換器の切換弁を暖房状態に設定すると共
に冷房する室内ユニットの室内熱交換器の切換弁を冷房
状態に設定し、且つ暖房する室内ユニットの室内熱交換
器の切換弁を暖房状態に設定すると、圧縮機から吐出さ
れた冷媒の一部が室外熱交換器に流れると共に残りの冷
媒が高圧ガス管を経て暖房する室内ユニットの室内熱交
換器へ流れこの室内熱交換器と室外熱交換器とで凝縮液
化される。そしてこれら熱交換器で凝縮液化された冷媒
は液管を経て各室内ユニットの冷媒減圧器に分配された
後、各室内熱交換器で蒸発気化し、然る後、低圧ガス管
を冷媒吸込管とを順次繰て圧縮機に吸入される。このよ
うに凝縮器として作用する室内熱交換器で一室が暖房さ
れ、蒸発器として作用する他の室内熱交換器で二基が冷
房される。Also, if you want to cool two units and heat one room at the same time, set the switching valve of the outdoor heat exchanger to the heating state and set the switching valve of the indoor heat exchanger of the indoor unit to be cooled to the cooling state. In addition, when the switching valve of the indoor heat exchanger of the indoor unit heating is set to the heating state, part of the refrigerant discharged from the compressor flows to the outdoor heat exchanger, and the remaining refrigerant passes through the high-pressure gas pipe and is used for heating. It flows to the indoor heat exchanger of the indoor unit, and is condensed and liquefied in this indoor heat exchanger and the outdoor heat exchanger. The refrigerant condensed and liquefied in these heat exchangers is distributed to the refrigerant pressure reducers of each indoor unit via liquid pipes, and then evaporated in each indoor heat exchanger.Then, the low pressure gas pipe is connected to the refrigerant suction pipe. and are sucked into the compressor in sequence. In this way, one room is heated by the indoor heat exchanger acting as a condenser, and two rooms are cooled by the other indoor heat exchanger acting as an evaporator.
（へ）実施例
本発明の第１実施例を第１図に基づいて説明すると、（
１）は圧縮機（２）と室外熱交換器（３）と気液分離器
（４）とを有する室外ユニット、（５ｇ＞（５ｂ） （
５Ｃ）は室内熱交換器（６ａ）（６ｂ）（６ｃ）を有す
る室内ユニットで、室外熱交換器（３）を圧縮機（２）
の冷媒吐出管（７）と冷媒吸込管（８）とに切換弁（９
ａ）（９ｂ）を介して分岐接続する一方、室外ユニット
（１）と室内ユニット（ｓａ＞（ｓｂ＞（５ｃ）とを接
続するユニット間配管（１０）を冷媒吐出管（７）と分
岐接続された高圧ガス管（１１）と、冷媒吸込管（８）
と分岐接続された低圧ガス管（１２）と、室外熱交換器
（３）と接続された液管（１３）とで構成して、各室内
熱交換器（６ａ） （６ｂ）（６ｃ）を高圧ガス管（１
１）と低圧ガス管（１２）とには夫々切換弁（１４ａ）
（１５ａ） 、 ＜１４ｂ）（１５ｂ） 、 （１４ｃ
）＜１５ｃ）を介して分岐接続すると共に液管（１３）
には電動式膨張弁等の冷媒減圧器（１６ａ ） （１６
ｂ ） （１６ｃ ）を介して接続している。(f) Example The first example of the present invention will be explained based on FIG.
1) is an outdoor unit having a compressor (2), an outdoor heat exchanger (3), and a gas-liquid separator (4), (5g>(5b)
5C) is an indoor unit having indoor heat exchangers (6a) (6b) (6c), and the outdoor heat exchanger (3) is connected to the compressor (2).
A switching valve (9) is installed between the refrigerant discharge pipe (7) and the refrigerant suction pipe (8).
a) Branch connection via (9b), while branch connection the inter-unit pipe (10) connecting the outdoor unit (1) and indoor unit (sa>(sb>(5c)) with the refrigerant discharge pipe (7) high pressure gas pipe (11) and refrigerant suction pipe (8)
Each indoor heat exchanger (6a) (6b) (6c) is composed of a low-pressure gas pipe (12) branched and connected to the outdoor heat exchanger (3), and a liquid pipe (13) connected to the outdoor heat exchanger (3). High pressure gas pipe (1
1) and the low pressure gas pipe (12) are each equipped with a switching valve (14a).
(15a) , <14b) (15b) , (14c
)<15c) and a liquid pipe (13).
A refrigerant pressure reducer such as an electric expansion valve (16a) (16
b) Connected via (16c).
（１７）は高圧ガス管（１１）と低圧ガス管（１２）と
を接続したバイパス管で、毛細管（１８）で冷媒絞り抵
抗をもたしている。(17) is a bypass pipe that connects the high pressure gas pipe (11) and the low pressure gas pipe (12), and has a capillary tube (18) that provides refrigerant throttling resistance.
（１９）は低圧ガス管（１２）に介在させた蒸発圧力調
整弁、（２０）は液管（１３）に介在させた電動式膨張
弁等の補助冷媒減圧器である。(19) is an evaporation pressure regulating valve interposed in the low pressure gas pipe (12), and (20) is an auxiliary refrigerant pressure reducer such as an electric expansion valve interposed in the liquid pipe (13).
次に運転動作を説明する。全室を同時に冷房する場合は
、室外熱交換器（３）の一方の切換弁（９ａ）を開くと
共に他方の切換弁（９ｂ）を閉じ、且つ室内熱交換器（
６ａ）（６ｂ）＜６ｃ）の一方の切換弁（１４ａ）（１
４ｂ）（１４ｃ）を閉じると共に他方の切換弁（１５ａ
）（１５ｂ）（１５Ｃ）を開くことにより、圧縮機（２
）から吐出された冷媒は吐出管（７）、切換弁（９ａ）
、室外熱交換器（３）と順次流れてここで凝縮液化した
後、液管（１３）を経て各室内ユニッ） （５ａ）（５
ｂ）（５ｃ）の冷媒減圧器（１６ａ）（１６ｂ）（１６
ｃ）に分配され、ここで減圧される。Next, the driving operation will be explained. When cooling all rooms at the same time, open one switching valve (9a) of the outdoor heat exchanger (3) and close the other switching valve (9b), and close the indoor heat exchanger (3).
6a) (6b)<6c) One switching valve (14a) (1
4b) (14c) and close the other switching valve (15a).
) (15b) (15C) to open the compressor (2).
) The refrigerant discharged from the discharge pipe (7) and the switching valve (9a)
, the outdoor heat exchanger (3), where it is condensed and liquefied, and then passed through the liquid pipe (13) to each indoor unit) (5a) (5
b) (5c) refrigerant pressure reducer (16a) (16b) (16
c), where it is depressurized.
然る後、各室内熱交換器（６ａ） （６ｂ） （６ｃ）
で蒸発気化した後、夫々切換弁（１５ａ）（ＩＳｂ＞（
１５ｃ）、低圧ガス管（１２）、吸込管（８）、気液分
離器（４）を順次経て圧縮機（２）に吸入きれる。この
ように蒸発器として作用する各室内熱交換器（６ａ）（
６ｂ）（６ｃ）で全室が同時に冷房される。After that, each indoor heat exchanger (6a) (6b) (6c)
After evaporation, the switching valves (15a) (ISb>(
15c), a low-pressure gas pipe (12), a suction pipe (8), and a gas-liquid separator (4) in order before being sucked into the compressor (2). In this way, each indoor heat exchanger (6a) acts as an evaporator (
6b) (6c) All rooms are cooled at the same time.
かかる同時冷房運転時、圧縮機（２）から吐出された冷
媒が高圧ガス管（１１）よりバイパス管（１７）を経て
低圧ガス管（１２）に導かれるので、高圧ガス管（１１
）に冷媒が溜まり込むことはない。During such simultaneous cooling operation, the refrigerant discharged from the compressor (2) is guided from the high pressure gas pipe (11) to the low pressure gas pipe (12) via the bypass pipe (17).
) Refrigerant will not accumulate in the
逆に全室を同時に暖房する場合は、室外熱交換器（３）
の一方の切換弁（９ａ）を閉じると共に他方の切換弁（
９ｂ）を開き、且つ室内熱交換器（６ａ）（６ｂ） （
６Ｃ）の一方の切換弁（１４ａ）（１４ｂ）（１４ｃ）
を開くと共に他方の切換弁（１５ａバ１５ｂ）（１５ｃ
）を閉じることにより、圧縮機（２〉から吐出された冷
媒は吐出管（７）、高圧ガス管（１１）を順次経て切換
弁（１４ａ）（１４ｂ）（１４Ｃ）、室内熱交換器（６
ａ）（６ｂ）（６ｃ）へと分配され、ここで夫々凝縮液
化した後、各冷媒減圧器（１６ａ）（１６ｂ）（１６ｃ
）で減圧されて液管（１３）で合流され、然る後、室外
熱交換器（３）で蒸発気化した後、切換弁（９ｂ）、吸
込管（８）、気液分離器（４）を順次経て圧縮機（２〉
に吸入される。このように凝縮器として作用する各室内
熱交換器（６ａ）（６ｂ） （６ｃ）で全室が同時に暖
房される。Conversely, if you want to heat all rooms at the same time, use an outdoor heat exchanger (3)
Close one switching valve (9a) and close the other switching valve (9a).
9b), and indoor heat exchangers (6a) (6b) (
6C) one switching valve (14a) (14b) (14c)
At the same time as opening the other switching valve (15a bar 15b) (15c
), the refrigerant discharged from the compressor (2>) passes through the discharge pipe (7), the high-pressure gas pipe (11) in order, and then passes through the switching valves (14a) (14b) (14C) and the indoor heat exchanger (6).
a) (6b) (6c), where the refrigerant is condensed and liquefied, and then distributed to each refrigerant pressure reducer (16a) (16b) (16c).
) and are combined in a liquid pipe (13), and then evaporated in an outdoor heat exchanger (3), followed by a switching valve (9b), a suction pipe (8), and a gas-liquid separator (4). The compressor (2)
is inhaled. In this way, all rooms are heated simultaneously by each indoor heat exchanger (6a) (6b) (6c) acting as a condenser.
又、同時に任意の例えば二基を冷房し一室を暖房する場
合は、室外熱交換器（３）の一方の切換弁（９ａ）を開
くと共に他方の切換弁（９ｂ）を閉じ、且つ、冷房する
室内ユニット（５ａ） （５ｃ）の一方の切換弁（１４
ａ）（１４ｃ）を閉じると共に他方の切換弁（１５ａ）
（１５ｃ）を開き、且つ暖房する室内ユニット（５ｂ）
の一方の切換弁（１４ｂ）を開くと共に他方の切換弁（
１５ｂ）を閉じると、圧縮機（２）から吐出された冷媒
の一部が吐出管（７）、切換弁（９ａ）を順次経て室外
熱交換器（３）に流れると共に残りの冷媒が高圧ガス管
（１１）を経て暖房する室内ユニット（５ｂ）の切換弁
（１４ｂ）、室内熱交換器（６ｂ）へと流れ、この室内
熱交換器（６ｂ）と室外熱交換器（３）とで凝縮液化さ
れる。そして、これら熱交換器（６ｂ）（３）で凝縮液
化された冷媒は液管（１３）を経て室内ユニット（５ａ
）（５Ｃ）の冷媒減圧器（１６ａ）（１６ｃ）で減圧さ
れた後、夫々の室内熱交換器（６ａ）（６ｃ）で蒸発気
化され、然る後、各切換弁（１５ａ）（１５ｃ）を経て
低圧ガス管（１２）で合流され、吸込管（８）、気液分
離器（４）を順次経て圧縮’ａ（２）に吸入される。こ
のように凝縮器として作用する室内熱交換器（６ｂ）で
−室が暖房きれ、蒸発器として作用する他の室内熱交換
器（６ａ）（６ｃ）で二基が冷房される。In addition, when simultaneously cooling two units and heating one room, open one switching valve (9a) of the outdoor heat exchanger (3) and close the other switching valve (9b), and One switching valve (14) of the indoor unit (5a) (5c)
a) Close (14c) and the other switching valve (15a)
Indoor unit (5b) that opens and heats (15c)
One switching valve (14b) is opened, and the other switching valve (14b) is opened.
15b), a part of the refrigerant discharged from the compressor (2) sequentially passes through the discharge pipe (7) and the switching valve (9a) and flows to the outdoor heat exchanger (3), and the remaining refrigerant is converted into high-pressure gas. It flows through the pipe (11) to the switching valve (14b) of the heating indoor unit (5b) and the indoor heat exchanger (6b), and is condensed in the indoor heat exchanger (6b) and the outdoor heat exchanger (3). liquefied. The refrigerant condensed and liquefied in these heat exchangers (6b) and (3) passes through the liquid pipe (13) to the indoor unit (5a).
) (5C), the refrigerant pressure is reduced by the refrigerant pressure reducers (16a) (16c), and then evaporated by the respective indoor heat exchangers (6a) (6c), and then each switching valve (15a) (15c) The gases are combined in a low-pressure gas pipe (12) through a suction pipe (8) and a gas-liquid separator (4), and are sucked into the compressor'a (2). In this way, the indoor heat exchanger (6b) that acts as a condenser heats the room, and the other indoor heat exchangers (6a) and (6c) that act as evaporators cool the two rooms.
かかる冷暖房同時運転時、室内ユニット（５ｂ）の冷媒
減圧器（１６ｂ）が全開して冷媒圧力損失が生じないよ
うにしているが、液管（１３）内の液冷媒圧力がアンバ
ランスにならないように補助冷媒減圧器（２０）で圧力
調整されている。During such simultaneous heating and cooling operation, the refrigerant pressure reducer (16b) of the indoor unit (5b) is fully opened to prevent refrigerant pressure loss, but the pressure of the liquid refrigerant in the liquid pipe (13) is not unbalanced. The pressure is regulated by an auxiliary refrigerant pressure reducer (20).
又、かかる冷暖房同時運転が冬期に行なわれると低圧冷
媒圧力が外気温によって左右されるため冷房している室
内ユニット（ｓａ）（５ｃ）の室内熱交換器（６ａ）（
６ｃ）内の冷媒圧力が４ｋｇ／ｃｍ”以下に低下し易く
なるが、この圧力低下は蒸発圧力調整弁（１９）の働き
により防止され室内熱交換器（６ａ）（６ｃ）が凍結す
ることはない。尚、蒸発圧力調整弁（１９）は低圧ガス
管（１２）に設ける代わりに各切換弁（１５ａ）（１５
ｂ）（１５ｃ）と低圧ガス管（１２）との間の管（２１
ａ）（２１ｂ）（２１ｃ）に夫々設けても良い。又、蒸
発圧力調整弁（１９）を設ける代わりに室内熱交換器（
６ａ） （６ｃ）内の冷媒圧力が４ｋｇハが以下に低下
した時は冷媒減圧器（１６ａ）（１６ｃ）の開度を絞り
、凍結が解除されると冷媒減圧器（１６ａ）（１６ｃ）
の開度を元に戻すようにしても良い。In addition, when such simultaneous heating and cooling operation is performed in winter, the indoor heat exchanger (6a) (
The refrigerant pressure in 6c) tends to drop below 4kg/cm'', but this pressure drop is prevented by the action of the evaporation pressure regulating valve (19), and the indoor heat exchangers (6a) and (6c) are prevented from freezing. No. In addition, the evaporation pressure regulating valve (19) is installed in each switching valve (15a) (15) instead of being installed in the low pressure gas pipe (12).
b) Pipe (21) between (15c) and low pressure gas pipe (12)
a) (21b) and (21c), respectively. Also, instead of providing the evaporation pressure regulating valve (19), an indoor heat exchanger (
6a) When the refrigerant pressure in (6c) drops below 4kg, reduce the opening of the refrigerant pressure reducer (16a) (16c), and when the freeze is removed, the refrigerant pressure reducer (16a) (16c)
The opening degree may be returned to its original value.
又、かかる冷暖房同時運転時、室外熱交換器（３）を冷
却する室外ファン（２２）の回転数を下げて高圧圧力の
低下を防止するため、室内ユニット（５ｂ）の暖房能力
が低下することはない。Furthermore, during such simultaneous cooling and heating operation, the heating capacity of the indoor unit (5b) is reduced because the rotation speed of the outdoor fan (22) that cools the outdoor heat exchanger (3) is lowered to prevent a drop in high pressure. There isn't.
このように各室内ユニット（５ａ）（５ｂ）（５ｃ）は
夫々の切換弁（１４ａ）（１５ａ） 、 （１４ｂ）（
１５ｂ） 、 （１４ｃ）（１５ｃ）を開閉させること
により任意に冷暖房運転することが可能である。In this way, each indoor unit (5a) (5b) (5c) has a respective switching valve (14a) (15a), (14b) (
By opening and closing 15b), (14c) and (15c), heating and cooling operation can be performed as desired.
尚、−室を冷房し二基を暖房する場合は補助冷媒減圧器
（２０）を作動させることにより可能である。Note that cooling the - room and heating the two rooms can be done by operating the auxiliary refrigerant pressure reducer (20).
例えば、室内ユニット（５ｂ）で冷房し室内ユニツ）
（５ａ）（５ｃ）で暖房する場合は室外熱交換器（３）
の一方の切換弁（９ａ）を閉じると共に他方の切換弁（
９ｂ）を開き、且つ冷房する室内ユニット（５ｂ）の一
方の切換弁（１４ｂ）を閉じると共に他方の切換弁（１
５ｂ）を開き、且つ暖房する室内ユニット（５ａ）（５
ｃ）の−方の切換弁（１４ａ）（１４ｃ）を開くと共に
他方の切換弁（１５ｇ＞（１５ｃ）を閉じると圧縮機（
２）から吐出された冷媒が吐出管（７）、高圧ガス管（
１１）を順次経て切換弁（１４ａ）（１４ｃ）へと分配
され夫々の室内熱交換器（６ａ）（６ｃ）で凝縮液化さ
れる。そしてこの液化された冷媒は夫々全開された冷媒
減圧器（１６ａ）（１６ｃ）を経て液管（１３）に流れ
、この液管中の液冷媒の一部が冷媒減圧器（１６ｂ）で
減圧された後に室内熱交換器（６ｂ）で、且つ残りの液
冷媒が補助冷媒減圧器（２０）で減圧された後に室外熱
交換器（３）で夫々蒸発気化され、吸込管（８）、気液
分離器（４）を順次経て圧縮機（２）に吸入される。こ
のように凝縮器として作用する室内熱交換器（６ａ）（
６ｃ）で二基が暖房され、蒸発器として作用する他の室
内熱交換器（６ｂ）で−室が冷房される。For example, if the indoor unit (5b) is used to cool the air conditioner (indoor unit)
(5a) If heating with (5c), outdoor heat exchanger (3)
Close one switching valve (9a) and close the other switching valve (9a).
9b), and closes one switching valve (14b) of the indoor unit (5b) for cooling, and closes the other switching valve (14b).
5b) and an indoor unit (5a) (5b) for heating.
When the negative switching valve (14a) (14c) of c) is opened and the other switching valve (15g>(15c) is closed), the compressor (
The refrigerant discharged from the discharge pipe (7) and the high pressure gas pipe (
11) and then distributed to the switching valves (14a) and (14c), and is condensed and liquefied in the respective indoor heat exchangers (6a) and (6c). The liquefied refrigerant then flows into the liquid pipe (13) through the fully opened refrigerant pressure reducers (16a) and (16c), and a part of the liquid refrigerant in this liquid pipe is depressurized by the refrigerant pressure reducer (16b). After that, the remaining liquid refrigerant is depressurized in the indoor heat exchanger (6b), and the remaining liquid refrigerant is depressurized in the auxiliary refrigerant pressure reducer (20), and then evaporated in the outdoor heat exchanger (3). It passes sequentially through the separator (4) and is sucked into the compressor (2). In this way, the indoor heat exchanger (6a) acts as a condenser (
In 6c), the two rooms are heated, and in the other room heat exchanger (6b), which acts as an evaporator, the room is cooled.
かかる同時冷暖房運転時においても、圧縮機（２）から
吐出された冷媒が高圧ガス管（１１）よりバイパス管（
１７）を経て低圧ガス管（１２）に導かれるので高圧ガ
ス管（１１）に冷媒が溜まり込むことはない。Even during such simultaneous heating and cooling operation, the refrigerant discharged from the compressor (2) is transferred from the high pressure gas pipe (11) to the bypass pipe (
Since the refrigerant is guided to the low pressure gas pipe (12) through the refrigerant 17), the refrigerant does not accumulate in the high pressure gas pipe (11).
以上の如く、冷房する室の数（冷房容量）が暖房する室
の数（暖房容量）よりも多い時は室外熱交換器（３）を
凝縮器として、逆に暖房する室の数（暖房容量）が冷房
する室の数（冷房容量、）よりも少ない時は室外熱交換
器（３）を蒸発器として作用させることにより任意の室
を自由に冷暖房することができると共に、この同時冷暖
房運転時に蒸発器及び凝縮器として作用する夫々の室内
熱交換器で熱回収が行なわれ、運転効率を向上させるこ
とができる。As mentioned above, when the number of rooms to be cooled (cooling capacity) is greater than the number of rooms to be heated (heating capacity), the outdoor heat exchanger (3) is used as a condenser, and conversely, the number of rooms to be heated (heating capacity) is ) is smaller than the number of rooms to be cooled (cooling capacity), the outdoor heat exchanger (3) acts as an evaporator to freely cool or heat any room. Heat recovery is performed in each indoor heat exchanger acting as an evaporator and a condenser, which can improve operational efficiency.
又、上述の全室冷房運転中に例えば室内ユニット（５ｂ
）のみを暖房運転に切換える場合、切換弁（１４ｂ）（
１５ｂ）の両方を閉じると共に冷媒減圧器（１６ｂ）の
開度を開きぎみにして予め室内熱交換器（６ｂ）内の冷
媒圧力を上げた後、切換弁（１４ｂ）を開けば冷媒圧力
差による冷媒音の発生が肪止諮れる。Also, during the above-mentioned all-room cooling operation, for example, the indoor unit (5b
) to switch to heating operation, switch valve (14b) (
15b) and open the refrigerant pressure reducer (16b) to increase the refrigerant pressure in the indoor heat exchanger (6b), and then open the switching valve (14b) to reduce the refrigerant pressure difference. The generation of refrigerant noise can be prevented.
同様に、全室暖房運転中に例えば室内ユニット（５ｂ）
のみを冷房運転に切換える場合、一方の切換弁（１４ｂ
）と冷媒減圧器（１６ｂ）とを閉じると共に他方の切換
弁（１５ｂ）を僅か開いて強制的に室内熱交換器（６ｂ
）内の冷媒圧力を下げた後、又はこの切換弁（１５ｂ）
も閉じ室内熱交換器（６ｂ）内の冷媒圧力が自然に低下
した後に切換弁（１５ｂ）を開けば冷媒圧力差による冷
媒音の発生が防止される。Similarly, during all-room heating operation, for example, the indoor unit (5b)
When switching only one switching valve (14b) to cooling operation,
) and the refrigerant pressure reducer (16b) are closed, and the other switching valve (15b) is slightly opened to forcefully close the indoor heat exchanger (6b).
) or after reducing the refrigerant pressure in this switching valve (15b).
If the switching valve (15b) is opened after the refrigerant pressure in the indoor heat exchanger (6b) naturally decreases after the refrigerant pressure is closed, the generation of refrigerant noise due to the difference in refrigerant pressure can be prevented.
尚、切換弁（１５ｂ）を僅か開かせるには切換弁（１５
ｂ）として開度調整可能な高価な電動弁を用いることに
なるため、切換弁（１５ｂ）及び他の切換弁（１５ａ）
（１５ｃ）と並列に圧力逃がし用のバイパス用毛細管を
設ければ、切換弁（１５ａ）（１５ｂ）（１５ｃ）とし
て単なる開閉弁を用いることができる。In addition, in order to open the switching valve (15b) slightly,
Since an expensive motor-operated valve with adjustable opening is used as b), the switching valve (15b) and other switching valves (15a)
If a bypass capillary tube for pressure relief is provided in parallel with (15c), simple on-off valves can be used as the switching valves (15a), (15b), and (15c).
第２図は本発明の第２実施例を示すもので、室内ユニッ
ト（５Ｃ）が電算機室などの年間冷房室に設置される場
合は切換弁（１４ｃ）（１５ｃ）を用いずに、直接、室
内熱交換器（６ｃ）を低圧ガス管（１２）に接続したも
のである。Fig. 2 shows a second embodiment of the present invention, in which when the indoor unit (5C) is installed in a year-round cooling room such as a computer room, the , an indoor heat exchanger (6c) is connected to a low pressure gas pipe (12).
第３図は本発明の第３実施例を示すもので、室内熱交換
器（６ｃ）を年間暖房や給湯用として利用する場合は切
換弁（１４ｃ）（１５ｃ）を用いずに、直接、室内熱交
換器（６ｃ）を高圧ガス管（１１）に接続したものであ
る。FIG. 3 shows a third embodiment of the present invention. When the indoor heat exchanger (6c) is used for year-round heating or hot water supply, the A heat exchanger (6c) is connected to a high pressure gas pipe (11).
第４図は本発明の第４実施例を示すもので、各室内ユニ
ット（５ａ）（５ｂ）（５ｃ）内の配管を図示の如く接
続して切換弁（１４ａ）（Ｌ５ａ） 、 （１４ｂ）（
１５ｂ） 、 （１４ｃ）（１５ｃ ）、及び冷媒減圧
器（１６ａ）（１６ｂ）（１６ｃ）、並びに逆止弁（２
３ａ）（２３ｂ）（２３ｃ）を設けたものであり、冷房
時は液管（１３）からの液冷媒が冷媒減圧器（１６ａ）
（１６ｂ）（１６ｃ）で減圧された後、室内熱交換器（
６ａ）（６ｂ）（６ｃ）−切換弁（１５ａ）（１５ｂ）
（１５ｃ）−低圧ガス管（１２）と流れ、暖房時は高圧
ガス管（１１）からのガス冷媒が切換弁（１４ａ）（１
４ｂ＞（１４ｃ）−室内熱交換器（６ａ）（６ｂ）（６
ｃ）−逆止弁（２３ａバ２３ｂ）（２３ｃ）−液管（１
３）と流れるほかは上記第１実施例と同様である。FIG. 4 shows a fourth embodiment of the present invention, in which the pipes in each indoor unit (5a), (5b), and (5c) are connected as shown, and the switching valves (14a), (L5a), and (14b) are installed. (
15b), (14c) (15c), refrigerant pressure reducer (16a) (16b) (16c), and check valve (2
3a), (23b), and (23c), and during cooling, the liquid refrigerant from the liquid pipe (13) is transferred to the refrigerant pressure reducer (16a).
(16b) After being depressurized in (16c), the indoor heat exchanger (
6a) (6b) (6c)-Switching valve (15a) (15b)
(15c) - flows with the low pressure gas pipe (12), and during heating, the gas refrigerant from the high pressure gas pipe (11) flows through the switching valve (14a) (1
4b>(14c) - Indoor heat exchanger (6a) (6b) (6
c) - Check valve (23a bar 23b) (23c) - Liquid pipe (1
3) is the same as in the first embodiment.
第５図は本発明の第５実施例を示すもので、各室内熱交
換器（６ａ）（６ｂ）（６ｃ）を夫々第１熱交換器（６
１ａ）（６１ｂ＞（６１ｃ）と第２熱交換器（６２ａ）
（６２ｂ）（６２ｃ）とに二分割してこの内熱交換器の
間に電動式膨張弁等の除湿用冷媒減圧器（２４ａ）（２
４ｂバ２４Ｃ）を設けたものであり、冷房時は液管（１
３）からの液冷媒が冷媒減圧器（１６ａ）（１６ｂ）（
１６ｃ）で減圧された後、第１熱交換器（６１ａ）（６
１ｂ）（６１ｃ）−全開状態の除湿用冷媒減圧器（２４
ａ）（２４ｂ）（２４ｃ）−第２熱交換器（６２ａ）（
６２ｂ）（６２ｃ）−切換弁（１５ａ）（１５ｂ）（１
５ｃ）と流れ、蒸発器として作用する第１．第２熱交換
器（６１ａ）（６２ａ） 、 （６１ｂ）（６２ｂ）
、 （６１ｃ）（６２ｃ）で夫々冷房される。FIG. 5 shows a fifth embodiment of the present invention, in which each indoor heat exchanger (6a) (6b) (6c) is connected to the first heat exchanger (6c).
1a) (61b>(61c) and second heat exchanger (62a)
(62b) and (62c), and between these internal heat exchangers is a dehumidifying refrigerant pressure reducer such as an electric expansion valve (24a) and (24a).
4b bar 24C), and when cooling, the liquid pipe (1
3) The liquid refrigerant from the refrigerant pressure reducer (16a) (16b) (
16c), the first heat exchanger (61a) (6
1b) (61c) - Fully open dehumidifying refrigerant pressure reducer (24
a) (24b) (24c) - Second heat exchanger (62a) (
62b) (62c) - Switching valve (15a) (15b) (1
5c) and the first one, which acts as an evaporator. Second heat exchanger (61a) (62a), (61b) (62b)
, (61c) and (62c), respectively.
一方、暖房時は高圧ガス管（１１）からのガス冷媒が切
換弁（１４ａ）（１４ｂ）（１４ｃ）−第２熱交換器（
６２ａ）（６２ｂ）＜６２ｃ）−全開状態の除湿用冷媒
減圧器（２４ａ）（２４ｂ）（２４ｃ）−第１熱交換器
（６１ａ）（６１ｂ）（６１ｃ）−冷媒減圧器（１６ａ
）（１６ｂ）（１６ｃ＞−液管（１３）と流れ、凝縮器
として作用する第１．第２熱交換器（６１ａ）（６２ａ
＞ 。On the other hand, during heating, the gas refrigerant from the high pressure gas pipe (11) flows through the switching valves (14a) (14b) (14c) - the second heat exchanger (
62a) (62b) < 62c) - Fully open dehumidifying refrigerant pressure reducer (24a) (24b) (24c) - First heat exchanger (61a) (61b) (61c) - Refrigerant pressure reducer (16a)
) (16b) (16c>-The first and second heat exchangers (61a) (62a) flow with the liquid pipe (13) and act as condensers.
>.
（６１ｂ）（６２ｂ） 、 （６１ｃ）（６２ｃ）で夫
々暖房される。(61b) (62b), (61c) (62c) are heated respectively.
又、除湿時は液管（１３）からの液冷媒が全開状態の冷
媒減圧器（１６ａ）（１６ｂ）（１６ｃ）−第１熱交換
器（６１ａ）（６１ｂ）（６１ｃ）を経て除湿用冷媒減
圧器（２４ａ）（２４ｂ）（２４ｃ）テ減圧された後、
第２熱交換器（６２ａ）（６２ｂ）（６２ｃ）−切換弁
（１５ａ）（１５ｂ）（１５ｃ）と流れ、蒸発器として
作用する第２熱交換器（６２ａ）（６２ｂ）（６２ｃ）
で冷却された室内空気が凝縮器として作用する第１熱交
換器（６１ａ）（６１ｂ＞（６１ｃ）で再加熱されて除
湿される。Also, during dehumidification, the liquid refrigerant from the liquid pipe (13) passes through the refrigerant pressure reducers (16a) (16b) (16c) in a fully open state - the first heat exchanger (61a) (61b) (61c), and then becomes the dehumidifying refrigerant. After the pressure is reduced by the pressure reducer (24a) (24b) (24c),
Second heat exchanger (62a) (62b) (62c) - flows with the switching valve (15a) (15b) (15c) and acts as an evaporator
The cooled indoor air is reheated and dehumidified in the first heat exchanger (61a) (61b>(61c)) which acts as a condenser.
尚、上記各実施例では３台の室内ユニット（５ａ）（５
ｂ）（５ｃ）を用いたが、４台以上の多数の能力が異な
る室内ユニットの場合でも単にユニット間配管（１０）
と分岐接続するだけで良く、しかも圧縮機（２）を周波
数変換型、極数変換型、アンローダ型などの能力可変型
圧縮機とすれば任意の室内ユニットの運転を休止させる
ことが可能である。In each of the above embodiments, three indoor units (5a) (5
b) (5c) was used, but even in the case of four or more indoor units with different capacities, simply connect the inter-unit piping (10).
It is only necessary to branch connect the compressor (2) to a variable capacity compressor such as a frequency conversion type, pole number conversion type, or unloader type, making it possible to stop the operation of any indoor unit. .
（ト）発明の効果
本発明は室外ユニットと複数台の室内ユニットを接続す
るユニット間配管を、高圧ガス管と低圧とで、複数台の
室内ユニットの同時冷房運転及び同時暖房運転はもとよ
り冷暖房同時運転を任意の室内ユニットで自由に選択し
て行なうことができる。(G) Effects of the Invention The present invention uses high-pressure gas pipes and low-pressure gas pipes to connect the outdoor unit to multiple indoor units, allowing simultaneous cooling and heating operations as well as simultaneous cooling and heating operations for multiple indoor units. Operation can be freely selected in any indoor unit.
しかも、冷暖房同時運転時には凝縮器として作用する室
内熱交換器と、蒸発器として作用する室内熱交換器とが
シリーズ接続されるため熱回収による効率の良い運転を
行なうことができる。Furthermore, during simultaneous heating and cooling operations, the indoor heat exchanger that functions as a condenser and the indoor heat exchanger that functions as an evaporator are connected in series, so that efficient operation can be achieved through heat recovery.
第１図は本発明の第１実施例を示す多室型冷暖房装置の
冷媒回路図、第２図は本発明の第２実施例を示す多室型
冷暖房装置の冷媒回路図、第３図は本発明の第３実施例
を示す多室型冷暖房装置の冷媒回路図、第４図は本発明
の第４実施例を示す多室型冷暖房装置の冷媒回路図、第
５図は本発明の第５実施例を示す多室型冷暖房装置の冷
媒回路図である。
（１）・・・室外ユニット、 （２）・・・圧縮機、
（３）・・・室外熱交換器、 （５ａ） （５ｂ） （
５ｃ）・・・室内ユニット、（６ａ）（６ｂ）（６ｃ）
・・・室内熱交換器、 （７〉・・・冷媒吐出管、 （
８）・・・冷媒吸込管、 （９ａ）（９ｂ）・・・切換
弁、（１０）・・・ユニット間配管、 （１１）・・・
高圧ガス管、（１２）−・・低圧ガス管、 （１３）−
・・液管、 （１４ａ）（１４ｂ）（１４ｃ） 、 （
１５ａ）（１５ｂ）（１５ｃ）−・切換弁、 （１６ａ
）（１６ｂ）（１６ｃ）・・・冷媒減圧器、 （１７）
・・・バイパス管。FIG. 1 is a refrigerant circuit diagram of a multi-room air conditioning system according to a first embodiment of the present invention, FIG. 2 is a refrigerant circuit diagram of a multi-room air conditioning system according to a second embodiment of the present invention, and FIG. FIG. 4 is a refrigerant circuit diagram of a multi-room air-conditioning and heating system showing a fourth embodiment of the present invention, and FIG. It is a refrigerant circuit diagram of a multi-room type air-conditioning device showing a fifth embodiment. (1)...Outdoor unit, (2)...Compressor,
(3)...Outdoor heat exchanger, (5a) (5b) (
5c)...Indoor unit, (6a) (6b) (6c)
...Indoor heat exchanger, (7>...Refrigerant discharge pipe, (
8)...Refrigerant suction pipe, (9a) (9b)...Switching valve, (10)...Inter-unit piping, (11)...
High pressure gas pipe, (12) - Low pressure gas pipe, (13) -
...Liquid pipe, (14a) (14b) (14c), (
15a) (15b) (15c)-・Switching valve, (16a
)(16b)(16c)...refrigerant pressure reducer, (17)
...Bypass pipe.
Claims (2)
、室内熱交換器を有する複数台の室内ユニットとをユニ
ット間配管で接続した多室型冷暖房装置において、室外
熱交換器を圧縮機の冷媒吐出管と冷媒吸込管とに切換弁
を介して分岐接続する一方、ユニット間配管を前記吐出
管と分岐接続された高圧ガス管と、前記吸込管と分岐接
続された低圧ガス管と、室外熱交換器と接続された液管
とで構成して、各室内熱交換器を前記高圧ガス管と低圧
ガス管とには切換弁を介して分岐接続すると共に前記液
管には冷媒減圧器を介して接続したことを特徴とする多
室型冷暖房装置。(1) In a multi-room air conditioning system in which an outdoor unit having a compressor and an outdoor heat exchanger and multiple indoor units each having an indoor heat exchanger are connected by inter-unit piping, the outdoor heat exchanger is connected to the compressor. A high-pressure gas pipe is branch-connected to the refrigerant discharge pipe and the refrigerant suction pipe via a switching valve, while the inter-unit piping is branch-connected to the discharge pipe, and a low-pressure gas pipe is branch-connected to the suction pipe. Each indoor heat exchanger is configured with an outdoor heat exchanger and a connected liquid pipe, and each indoor heat exchanger is branch-connected to the high-pressure gas pipe and low-pressure gas pipe via a switching valve, and a refrigerant pressure reducer is connected to the liquid pipe. A multi-room air conditioning system characterized by being connected via.
るバイパス管で接続した特許請求の範囲第１項記載の多
室型冷暖房装置。(2) The multi-room air conditioning system according to claim 1, wherein the high pressure gas pipe and the low pressure gas pipe are connected by a bypass pipe having refrigerant throttling resistance.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62324493A JP2760500B2 (en) | 1987-12-21 | 1987-12-21 | Multi-room air conditioner |
| KR1019880016983A KR920001995B1 (en) | 1987-12-21 | 1988-12-19 | Air-conditioning apparatus |
| US07/287,086 US4878357A (en) | 1987-12-21 | 1988-12-21 | Air-conditioning apparatus |
| GB8829786A GB2213248B (en) | 1987-12-21 | 1988-12-21 | Air-conditioning apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62324493A JP2760500B2 (en) | 1987-12-21 | 1987-12-21 | Multi-room air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01167561A true JPH01167561A (en) | 1989-07-03 |
| JP2760500B2 JP2760500B2 (en) | 1998-05-28 |
Family
ID=18166421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62324493A Expired - Lifetime JP2760500B2 (en) | 1987-12-21 | 1987-12-21 | Multi-room air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2760500B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0445368A2 (en) * | 1990-03-07 | 1991-09-11 | Mitsubishi Denki Kabushiki Kaisha | Cooling and heating concurrent operation type of multiple refrigeration cycle |
| JPH05231749A (en) * | 1991-01-10 | 1993-09-07 | Mitsubishi Electric Corp | Air conditioner |
| JP2001336856A (en) * | 2000-05-29 | 2001-12-07 | Sanyo Electric Co Ltd | Air conditioning apparatus |
| JP2008298298A (en) * | 2007-05-29 | 2008-12-11 | Sanyo Electric Co Ltd | Air conditioning device |
| JP2009092251A (en) * | 2007-10-03 | 2009-04-30 | Yutaka Takahashi | Heating/cooling and hot water supplying heat pump system |
| JP2010002119A (en) * | 2008-06-19 | 2010-01-07 | Daikin Ind Ltd | Air conditioning system |
| US11486616B2 (en) | 2018-03-30 | 2022-11-01 | Daikin Industries, Ltd. | Refrigeration device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57173675A (en) * | 1981-04-17 | 1982-10-26 | Hitachi Ltd | Four-way valve for heat pump type air conditioner |
| JPS59113174U (en) * | 1983-01-20 | 1984-07-31 | 株式会社東芝 | Heat pump air conditioner |
| JPS6035171U (en) * | 1983-08-17 | 1985-03-11 | 三菱電機株式会社 | Air conditioning equipment |
| JPS61110859A (en) * | 1984-11-02 | 1986-05-29 | ダイキン工業株式会社 | Heat recovery type air conditioner |
-
1987
- 1987-12-21 JP JP62324493A patent/JP2760500B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57173675A (en) * | 1981-04-17 | 1982-10-26 | Hitachi Ltd | Four-way valve for heat pump type air conditioner |
| JPS59113174U (en) * | 1983-01-20 | 1984-07-31 | 株式会社東芝 | Heat pump air conditioner |
| JPS6035171U (en) * | 1983-08-17 | 1985-03-11 | 三菱電機株式会社 | Air conditioning equipment |
| JPS61110859A (en) * | 1984-11-02 | 1986-05-29 | ダイキン工業株式会社 | Heat recovery type air conditioner |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0445368A2 (en) * | 1990-03-07 | 1991-09-11 | Mitsubishi Denki Kabushiki Kaisha | Cooling and heating concurrent operation type of multiple refrigeration cycle |
| US5086624A (en) * | 1990-03-07 | 1992-02-11 | Mitsubishi Denki Kabushiki Kaisha | Cooling and heating concurrent operation type of multiple refrigeration cycle |
| JPH05231749A (en) * | 1991-01-10 | 1993-09-07 | Mitsubishi Electric Corp | Air conditioner |
| JP2001336856A (en) * | 2000-05-29 | 2001-12-07 | Sanyo Electric Co Ltd | Air conditioning apparatus |
| JP2008298298A (en) * | 2007-05-29 | 2008-12-11 | Sanyo Electric Co Ltd | Air conditioning device |
| JP2009092251A (en) * | 2007-10-03 | 2009-04-30 | Yutaka Takahashi | Heating/cooling and hot water supplying heat pump system |
| JP2010002119A (en) * | 2008-06-19 | 2010-01-07 | Daikin Ind Ltd | Air conditioning system |
| US11486616B2 (en) | 2018-03-30 | 2022-11-01 | Daikin Industries, Ltd. | Refrigeration device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2760500B2 (en) | 1998-05-28 |
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