JPH0293263A - Air conditioning device - Google Patents

Air conditioning device

Info

Publication number
JPH0293263A
JPH0293263A JP24784888A JP24784888A JPH0293263A JP H0293263 A JPH0293263 A JP H0293263A JP 24784888 A JP24784888 A JP 24784888A JP 24784888 A JP24784888 A JP 24784888A JP H0293263 A JPH0293263 A JP H0293263A
Authority
JP
Japan
Prior art keywords
valve
refrigerant
heat exchanger
pipe
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
Application number
JP24784888A
Other languages
Japanese (ja)
Other versions
JP2698118B2 (en
Inventor
Koji Nagae
公二 永江
Yoji Sasaki
洋二 佐々木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP63247848A priority Critical patent/JP2698118B2/en
Publication of JPH0293263A publication Critical patent/JPH0293263A/en
Application granted granted Critical
Publication of JP2698118B2 publication Critical patent/JP2698118B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To prevent the generation of refrigerant noise due to a difference in a refrigerant pressure by a method wherein, during simultaneous cooling heating operation, a second on-off valve is closed and a third on-off valve is opened, and during switching from heating to cooling operation, a high pressure refrigerant in an indoor heat exchanger flows through a bypass pipe to a liquid pipe, and after a refrigerant pressure is reduced, the second on-off valve is opened. CONSTITUTION:When two rooms are cooled and one room is heated, the one switching valve 9a of an outdoor heat exchanger 3 is opened and simultaneously the other switching valve 9b is closed. Further, first on-off valves 16a and 16c of indoor units 5a and 5c where cooling is effected are closed and simultaneously second on-off valves 17a and 17c and third on-off valves 23a and 23c are opened, and a first on-off valve 16b of an indoor unit 5b where heating is effected is opened and simultaneously a second on-off valve 17b and a third on-off valve 23b are closed. When, during heating operation of all rooms, for example, only the indoor unit 5b is switched to cooling operation, a high pressure refrigerant flows to a liquid pipe 13 through a bypass pipe 21b by means of which the first on-off valve 16b and a refrigerant pressure reducer 18b are closed, and after a refrigerant pressure in an indoor heat exchanger 6b is reduced, the second on-off valve 17b is closed.

Description

【発明の詳細な説明】 (イ)産業上の利用分野 本発明は室外ユニットと複数台の室内ユニットとから構
成きれ、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の空気調和
装置に関する。
Detailed Description of the Invention (a) Industrial Application Field The present invention is composed of an outdoor unit and a plurality of indoor units, and can simultaneously cool or heat all of the plurality of rooms and cool any room at the same time. This invention relates to a multi-room air conditioner that heats other rooms.

(ロ)従来の技術 複数室の全てを同時に冷房又は暖房でき、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の空気調和
装置が特公昭52−24710号公報、特公昭52−2
4711号公報、実公昭54−3020号公報で提示き
れている。
(B) Prior art A multi-room air conditioner that can cool or heat all of multiple rooms at the same time, and that can simultaneously cool one room and heat the other rooms, is disclosed in Japanese Patent Publication No. 52-24710 and Japanese Patent Publication No. 52-24710. 52-2
It has been fully presented in Publication No. 4711 and Publication No. 3020 of 1983.

(ハ)発明が解決しようとする課題 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1゛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) Problem to be solved by the invention The above-mentioned Japanese Patent Publication No. 52-24710 and Japanese Patent Publication No. 52-
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 valves for each indoor unit. Since the inter-unit piping must be drawn out from the outdoor unit, the number of inter-unit piping increases, making the piping work cumbersome.Moreover, during air-conditioning operation that cools one room and heats another room at the same time. However, the outdoor heat exchanger that corresponds to each indoor unit functions as a condenser and an evaporator, respectively, and discards heat outdoors, which has the disadvantage that heat cannot 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.

本発明は上述の課題を解決すると共に冷媒音の発生や室
内熱交換器の凍結を防止した多室型の空気調和装置を提
供するものである。
The present invention solves the above-mentioned problems and provides a multi-room air conditioner that prevents the generation of refrigerant noise and the freezing of an indoor heat exchanger.

(ニ)課題を解決するための手段 本発明は室外熱交換器の一端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、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接続された高圧ガス管と、
圧縮機の冷媒吸込管と接続された低圧ガス管と、室外熱
交換器の他端と接続された液管とで構成して、各室内熱
交換器の一端を前記高圧ガス管には第1開閉弁を、且つ
前記低圧ガス管には第2開閉弁を夫々介して分岐接続す
ると共に前記液管には冷媒減圧器を介して接続し、前記
第2開閉弁と並列に冷媒絞り抵抗を有するバイパス管及
び/又は第3開閉弁を接続するようにしたものである。
(d) Means for Solving the Problems The present invention connects one end of an outdoor heat exchanger to a refrigerant discharge pipe and a refrigerant suction pipe of a compressor via a switching valve, while connecting an outdoor unit and a plurality of indoor units. and the high pressure gas pipe connected to the refrigerant discharge pipe of the compressor, and
It consists of a low pressure gas pipe connected to the refrigerant suction pipe of the compressor, and a liquid pipe connected to the other end of the outdoor heat exchanger, and one end of each indoor heat exchanger is connected to the high pressure gas pipe. The on-off valve is branch-connected to the low-pressure gas pipe through a second on-off valve, and connected to the liquid pipe via a refrigerant pressure reducer, and has a refrigerant throttling resistor in parallel with the second on-off valve. A bypass pipe and/or a third on-off valve are connected thereto.

(*)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を
冷房状態に設定すると共に第1.第3開閉弁を閉じ且つ
第2開閉弁を開くことにより、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経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。
(*) Effect When cooling all rooms at the same time, set the switching valve of the outdoor heat exchanger to the cooling state and set the switching valve of the outdoor heat exchanger to the cooling state. By closing the third on-off valve and opening the second on-off valve, the refrigerant discharged from the compressor flows from the discharge pipe to the outdoor heat exchanger where it is condensed and liquefied, and then passes through the liquid pipe to the refrigerant of each indoor unit. It is distributed to a pressure reducer, and then evaporated in each indoor heat exchanger, and then suctioned into a compressor through a low-pressure gas pipe and a refrigerant suction pipe. 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
弁を暖房状態に設定すると共に、第1開閉弁を開き、且
つ第2.第3開閉弁を閉じることにより、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経て各室内
熱交換器に分配されここで夫々凝縮液化した後、各冷奴
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。
When heating all rooms at the same time, set the switching valve of the outdoor heat exchanger to the heating state, open the first on-off valve, and open the second on-off valve. By closing the third on-off valve, the refrigerant discharged from the compressor passes through the discharge pipe and the high-pressure gas pipe in order and is distributed to each indoor heat exchanger, where it is condensed and liquefied. The refrigerant is combined in a pipe, then 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第1、第3開閉弁を閉じ、
第2開閉弁を開き、且つ暖房する室内ユニットの第1開
閉弁を開き、第2、第3開閉弁を閉じると、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きれ
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
ガス管と冷媒吸込管とを順次経て圧縮機に吸入される。
In addition, when simultaneously cooling two units and heating one room, the switching valve of the outdoor heat exchanger is set to the heating state, and the first and third on-off valves of the indoor unit to be cooled are closed.
When the second on-off valve is opened, the first on-off valve of the heating indoor unit is opened, and the second and third on-off valves are closed, part of the refrigerant discharged from the compressor flows to the outdoor heat exchanger and the rest The refrigerant flows through the high-pressure gas pipe to the indoor heat exchanger of the heating indoor unit, and is condensed and liquefied in the indoor heat exchanger and 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, then evaporated in each indoor heat exchanger, and then transferred to the low-pressure gas pipe and refrigerant suction pipe. and is then sucked into the compressor.

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。かかる冷暖房同時運転時、冷房してい
る室内ユニットの室内熱交換器の凍結防止は第2開閉弁
を閉じて第3開閉弁を開くことにより行なわれ、又、任
意の室内ユニットが暖房から冷房運転に切り換わる際は
バイパス管を経て室内熱交換器の高圧冷媒が液管に流れ
て冷媒圧力が低下した後に第2開閉弁を開くことにより
冷媒圧力差による冷媒音の発生が防止される。
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. During such simultaneous heating and cooling operation, the indoor heat exchanger of the indoor unit being cooled is prevented from freezing by closing the second on-off valve and opening the third on-off valve, and any indoor unit is switched from heating to cooling operation. When switching, the high-pressure refrigerant in the indoor heat exchanger flows through the bypass pipe to the liquid pipe, and after the refrigerant pressure decreases, the second on-off valve is opened to prevent refrigerant noise from occurring due to the refrigerant pressure difference.

(へ)実施例 本発明の実施例を図面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、(5a)(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)の一端を圧縮機(2)の
冷媒吐出管(7)と冷媒吸込管(8)とに切換弁(9a
)(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(5a)(5b)(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)の他端と接続された液管(13)とで構成して、各
室内熱交換器(6a)(6b)(6c)の一端を高圧ガ
ス管(11)と低圧ガス管(12)とに分岐接続したガ
ス分岐管(14a)(15a) 、 (14b)(15
b) 、 (14c)(15c)と、この分岐管に設け
た第1開閉弁(16aバ16b)(16c)及び第2開
閉弁(17a)(17b)(17c)と各室内熱交換器
(6a)(6bバ6c)の他端を電動式膨張弁等の冷媒
減圧器(18a)(18b)(18c)を介して液管(
13)に接続した液分肢管(19aバ19bバ19c)
とを分岐ユニット(20a)(20b)(20c)に設
けている。
(f) Example To explain the example of the present invention based on the drawings, (1) is a compressor (2), an outdoor heat exchanger (3), and a gas-liquid separator (4).
and (5a), (5b, and 5c) are indoor units that have indoor heat exchangers (6a), (6b, and 6c), and one end of the outdoor heat exchanger (3) is connected to the compressor (2). A switching valve (9a) is installed between the refrigerant discharge pipe (7) and the refrigerant suction pipe (8).
) (9b), while the outdoor unit (
1) and the indoor units (5a), (5b, and 5c), the high-pressure gas pipe (11) is branch-connected to the refrigerant discharge pipe (7), and the refrigerant suction pipe (8). A low pressure gas pipe (12) branch-connected to the outdoor heat exchanger (
3) with a liquid pipe (13) connected to the other end, and one end of each indoor heat exchanger (6a) (6b) (6c) is connected to a high pressure gas pipe (11) and a low pressure gas pipe (12). Gas branch pipes (14a) (15a), (14b) (15
b) , (14c) (15c), the first on-off valve (16a bar 16b) (16c) and the second on-off valve (17a) (17b) (17c) provided in this branch pipe, and each indoor heat exchanger ( The other end of 6a) (6b bar 6c) is connected to a liquid pipe (
13) Liquid limb tube (19a bar 19b bar 19c) connected to
are provided in the branching units (20a), (20b), and (20c).

(21a)(21b>(21c)は毛細管(22a)(
22b)(22c)により絞り抵抗をもたしたバイパス
管、(23a)(23b)(23c)は第2開閉弁(1
7a)(17b)(17c)よりも口径の小さい第3開
閉弁で、これらバイパス管及び第3開閉弁を第2開閉弁
(17a)(17b)(17c)と夫々並列接続してこ
れらも分岐ユニット(20a)(20b)(20c)に
内蔵されている。
(21a) (21b>(21c) is a capillary (22a) (
22b) (22c) are the bypass pipes with throttling resistance, (23a) (23b) (23c) are the second on-off valve (1
7a) With a third on-off valve having a smaller diameter than (17b) (17c), these bypass pipes and the third on-off valve are connected in parallel with the second on-off valves (17a), (17b), and (17c), respectively, and these are also branched. Built into the units (20a) (20b) (20c).

(28)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。
(28) 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、且つ分岐ユニット(
20a)(20b)(20c)の第1開閉弁(16a)
(16b)(16c)を閉じると共に第2開閉弁(17
a)(17b)(17C)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)と液分肢管(19a)(19b)(
19c)を経て各室内ユニット(5a)(5b)(5c
)の冷媒減圧器(18a)(18b)(18c)に分配
きれ、ここで減圧きれる。然る後、各室内熱交換器(6
a)(6b)(6c)で蒸発気化した後、夫々第2開閉
弁(17a)(17b)(17c)、並びに第3開閉弁
(23a)(23b)(23c)、低圧ガス管(12)
、吸込管(8)、気液分離器(4)を順次繰て圧縮機(
2)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(6a)(6b)(6c)で全室が同時に
冷房きれる。
Next, the driving operation will be explained. When cooling all rooms at the same time, one switching valve (9a) of the outdoor heat exchanger (3) is opened, the other switching valve (9b) is closed, and the branch unit (
20a) (20b) (20c) first on-off valve (16a)
(16b) and (16c) and close the second on-off valve (17
a) By opening (17b) (17C), the compressor (
The refrigerant discharged from the discharge pipe (7) and the switching valve (9a
), the outdoor heat exchanger (3), where it condenses and liquefies, and then flows through the liquid pipe (13) and liquid branch pipes (19a) (19b) (
19c) to each indoor unit (5a) (5b) (5c)
), the refrigerant is distributed to the refrigerant pressure reducers (18a), (18b), and (18c), where the pressure is reduced. After that, each indoor heat exchanger (6
a) After evaporation in (6b) and (6c), the second on-off valves (17a) (17b) (17c), the third on-off valves (23a) (23b) (23c), and the low pressure gas pipe (12), respectively.
The compressor (
2) is inhaled. In this way, all rooms can be cooled simultaneously by each indoor heat exchanger (6a) (6b) (6c) acting as an evaporator.

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、且つ分岐ユニット(20a)(20b)
(20c)の第1開閉弁(16a)(16b)(16c
)を開くと共に第2開閉弁(17a)(17b)(17
c)と第3開閉弁(23a)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)を順次繰てガス分岐管(14a)(14b)
(14c)に分配された後、第1開閉弁(16a)(1
6b)(16c)、室内熱交換器(6a)(6b) (
6C)へと流れ、ここで夫々凝縮液化した後、各冷媒減
圧器(18a)(18b)(18c)で減圧され、液分
肢管(19a)(19b)(t9c)を経て液管(13
)で合流きれ、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)を順次繰て圧縮機(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 branching units (20a) (20b)
(20c) first on-off valves (16a) (16b) (16c
) and open the second on-off valves (17a) (17b) (17
c) and the third on-off valve (23a), the refrigerant discharged from the compressor (2) passes through the discharge pipe (7) and the high-pressure gas pipe (11) in sequence, and then passes through the gas branch pipes (14a) and (14b). )
(14c), the first on-off valve (16a) (1
6b) (16c), indoor heat exchanger (6a) (6b) (
After being condensed and liquefied here, the pressure is reduced by each refrigerant pressure reducer (18a) (18b) (18c), and the liquid pipe (13
), and then evaporated and vaporized in the outdoor heat exchanger (3), followed by the switching valve (9b), suction pipe (8), and gas-liquid separator (
4) is sequentially repeated and sucked into the compressor (2). Each indoor heat exchanger (6a) (6b) acts as a condenser in this way
(6c) All rooms are heated at the same time.

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)の分岐ユニット(20
a)(20c)における第1開閉弁(16a)(16c
)を閉じると共に第2開閉弁(17a)(17c)と第
3開閉弁(23a)(23c)を開き、且つ暖房する室
内ユニット(5b)ノ分岐ユニット(20b)における
第1開閉弁(16b)を開くと共に第2開閉弁(17b
)と第3開閉弁(23b)を閉じると、圧縮機(2)か
ら吐出された冷媒の一郡が吐出管(7)、切換弁(9a
)を順次繰て室外熱交換器(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)の分岐ユニット(20b)における第1開閉弁
(16b)、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
化きれた冷媒は液管(13)を経て室内ユニット(5a
)(5c)の冷媒減圧器(18a)(18c)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、第2開閉弁(17a)(17c)を経
て低圧ガス管(12)で合流され、吸込管(8)、気液
分離器(4〉を順次繰て圧縮W!(2)に吸入される。
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 branch unit (20) of the indoor unit (5a) (5c)
a) First on-off valve (16a) (16c) in (20c)
) and opens the second on-off valves (17a) (17c) and the third on-off valves (23a) (23c), and the first on-off valve (16b) in the branch unit (20b) of the indoor unit (5b) for heating. At the same time as opening the second on-off valve (17b
) and the third on-off valve (23b), a group of refrigerant discharged from the compressor (2) flows through the discharge pipe (7) and the switching valve (9a).
) in the branch unit (20b) of the indoor unit (5b) that sequentially flows to the outdoor heat exchanger (3) and the remaining refrigerant passes through the high-pressure gas pipe (11) for heating. It flows to the heat exchanger (6b) and is condensed and liquefied in the indoor heat exchanger (6b) and the outdoor heat exchanger (3). The refrigerant that has been condensed and liquefied in these heat exchangers (6b) and (3) passes through the liquid pipe (13) to the indoor unit (5a).
) (5c), the refrigerant is depressurized by the refrigerant pressure reducers (18a) (18c), and then evaporated by the respective indoor heat exchangers (6a) (6c), after which the second on-off valves (17a) (17c) ), the gases are combined in a low-pressure gas pipe (12), passed through a suction pipe (8) and a gas-liquid separator (4>) in sequence, and are sucked into the compressor W! (2).

このように凝縮器として作用する室内熱交換器(6b)
で−室が暖房され、蒸発器として作用する他の室内熱交
換器(6a)(6c)で一室が冷房される。
Indoor heat exchanger (6b) that acts as a condenser in this way
The room is heated, and the room is cooled by the other indoor heat exchangers (6a) (6c), which act as evaporators.

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(5a)(5c)の室内熱交換器(6a)(6c
)内の冷媒圧力が4kg/can”以下に低下し易くな
るが、この圧力低下は第2開閉弁(17a)(17c)
を閉じると共に口径の小さい第3開閉弁(23a)(2
3C)を開き室内熱交換器(6a)(6c)の冷媒出口
側の圧力を高めることにより防止され室内熱交換器(6
a)(6c)が凍結することはない。
When such simultaneous heating and cooling operation is performed in winter, the indoor heat exchangers (6a) (6c) of the indoor units (5a) (5c) that are cooling the air conditioner are affected because the low pressure refrigerant pressure is affected by the outside temperature.
), the refrigerant pressure in the second on-off valve (17a) (17c) tends to drop below 4kg/can.
and closes the third opening/closing valve (23a) (23a) with a small diameter.
3C) and increases the pressure on the refrigerant outlet side of the indoor heat exchangers (6a) and (6c).
a) (6c) never freezes.

次に一室を冷房し一室を暖房する場合は補助冷媒減圧器
(23)を作動させることにより可能である。
Next, cooling one room and heating one room can be done by operating the auxiliary refrigerant pressure reducer (23).

例えば、室内ユニット(5b)で冷房し室内ユニット(
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(9
b)を開き、且つ冷房する室内ユニット(5b)の分岐
ユニット(20b)における第1開閉弁(16b)を閉
じると共に第2開閉弁(17b)と第3開閉弁(23a
)を開き、且つ暖房する室内ユニット(5a)(5c)
の分岐ユニット(20a)(20c)における第1開閉
弁(16a)(16c>を開くと共に第2開閉弁(17
a)(17c)と第3開閉弁(23a)(23c)を閉
じると圧縮機(2)から吐出きれた冷媒が吐出管(7)
、高圧ガス管(11)を順次経て第1開閉弁(16a)
(16c)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(18g)(18C)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(18b)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(28)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(6b)で−室が冷房さ
れる。
For example, if the indoor unit (5b) cools the air conditioner and the indoor unit (5b)
5a) (5c), close one switching valve (9a) of the outdoor heat exchanger (3) and close the other switching valve (9a).
b), and closes the first on-off valve (16b) in the branch unit (20b) of the indoor unit (5b) for cooling, and also opens the second on-off valve (17b) and the third on-off valve (23a).
) and indoor units (5a) (5c) that open and heat the room.
The first on-off valves (16a) (16c> in the branch units (20a) and (20c) are opened, and the second on-off valve (17
a) When (17c) and the third on-off valve (23a) (23c) are closed, the refrigerant completely discharged from the compressor (2) is discharged into the discharge pipe (7).
, the first on-off valve (16a) through the high-pressure gas pipe (11)
(16c) and each indoor heat exchanger (6a) (
It is condensed and liquefied in step 6c). The liquefied refrigerant then flows into the liquid pipe (13) through the fully opened refrigerant pressure reducers (18g) (18C), and a part of the liquid refrigerant in this liquid pipe is depressurized by the refrigerant pressure reducer (18b). After that, install the indoor heat exchanger (6b
), and after the remaining liquid refrigerant is depressurized in the auxiliary refrigerant pressure reducer (28), it is evaporated and vaporized in the outdoor heat exchanger (3), respectively.
The compressor (2) passes through the suction pipe (8) and the gas-liquid separator (4) in sequence.
) is inhaled. In this way, one room is heated by the indoor heat exchangers (6a) and (6c) which act as condensers, and the other room is cooled by the other indoor heat exchanger (6b) which acts as an evaporator.

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t)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 When t) is smaller than the number of rooms to be cooled (cooling capacity), the outdoor heat exchanger (3) can be used 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、上述の全室暖匠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、第1開閉弁(16b
)と冷媒減圧器(18b)とを閉じるとバイパス管(2
1b>より液管(13)に高圧冷媒が流れて室内熱交換
器(6b)内の冷媒圧力が低下した後に第2開閉弁(1
7b)を開くことにより冷媒圧力差による冷媒音の発生
が防止される。
Also, during the above-mentioned all-room heating operation, for example, if the indoor unit (5b
) to cooling operation, the first on-off valve (16b
) and the refrigerant pressure reducer (18b) are closed, the bypass pipe (2
1b>, the high-pressure refrigerant flows into the liquid pipe (13) and the refrigerant pressure in the indoor heat exchanger (6b) decreases, after which the second on-off valve (1
By opening 7b), generation of refrigerant noise due to refrigerant pressure difference is prevented.

又、このバイパス管(21a)(21b)(21c)は
室内ユニッ) (5a)(5b)(5c)が冷房又は暖
房運転を停止した際、これら室内ユニット中に冷媒が溜
まり込むのを防止する冷媒回収器としても作用している
In addition, these bypass pipes (21a), (21b, and 21c) are used to prevent refrigerant from accumulating in the indoor units when the indoor units (5a, 5b, and 5c) stop cooling or heating operation. It also acts as a refrigerant recovery device.

尚、上記実施例では3台の室内ユニッ)−(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)
ニ分岐ユニットで分岐接続するだけで良く、配管接続作
業を容易に行なえる。
In the above embodiment, there are 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).
All you have to do is make a branch connection using the two-branch unit, making piping connection work easy.

又、上記実施例では、切換弁(9a)(9b)に夫々二
方弁を用いたが、この代わりに切換弁(9a)(9b)
を1個の三方弁として用いても良い。
In addition, in the above embodiment, two-way valves were used as the switching valves (9a) and (9b), but instead of these two-way valves, the switching valves (9a) and (9b)
may be used as one three-way valve.

(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とを接続
するユニット間配管を、高圧ガス管と低圧ガス管と液管
との3本の冷媒管で構成したので、室内ユニットをユニ
ット間配管に単に分岐接読するだけで何台でも組み合わ
せることができると共に、切換弁及び第1.第2開閉弁
の操作により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、且つ、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。
(G) Effects of the Invention In the present invention, the inter-unit piping that connects the outdoor unit and a plurality of indoor units is composed of three refrigerant pipes: a high-pressure gas pipe, a low-pressure gas pipe, and a liquid pipe. It is possible to combine any number of units by simply branching and reading them into the inter-unit piping, and the switching valve and the first. By operating the second on-off valve, you can freely select simultaneous cooling and heating operations for multiple indoor units as well as simultaneous cooling and heating operations for any indoor unit. Since the indoor heat exchanger that acts as an evaporator and the indoor heat exchanger that acts as an evaporator are connected in series, efficient operation can be achieved through heat recovery.

しかも、かかる冷暖房同時運転時、冷房している室内ユ
ニットの室内熱交換器の凍結防止は第2開閉弁を閉じて
第3開閉弁を開くことにより行なわれ、又、任意の室内
ユニットが暖房から冷、房運転に切り換わる際はバイパ
ス管を経て室内熱交換器内の高圧冷媒が液管に流れて冷
媒圧力が低下した後に第2開閉弁を開くことにより冷媒
圧力差による冷媒音の発生を防止することができる。
Moreover, during such simultaneous heating and cooling operation, the indoor heat exchanger of the indoor unit being cooled is prevented from freezing by closing the second on-off valve and opening the third on-off valve, and any indoor unit is disconnected from heating. When switching to cooling or air-conditioning operation, the high-pressure refrigerant in the indoor heat exchanger flows through the bypass pipe to the liquid pipe, and after the refrigerant pressure drops, the second on-off valve is opened to prevent refrigerant noise caused by the difference in refrigerant pressure. It can be prevented.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明の実施例を示す空気調和装置の冷媒回路図
である。 (1〉・・・室外ユニット、 (2)・・・圧縮機、 
(3)・・・室外熱交換器、 (sa>(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、 (16a)(16b)(16c)=第1開閉
弁、 (17a)(17b)(17c)”・氷2開閉弁
、 (21g>(21b)(21c)・・・バイパス管
、(23b)(23c)−−−第3開閉弁。 (23g)
The drawing is a refrigerant circuit diagram of an air conditioner showing an embodiment of the present invention. (1>...outdoor unit, (2)...compressor,
(3)...Outdoor heat exchanger, (sa>(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, (16a) (16b) (16c) = 1st on-off valve, (17a) (17b) (17c)'' - Ice 2 on-off valve, (21g>(21b) (21c)... bypass pipe, (23b) (23c) --- Third on-off valve. (23g)

Claims (1)

【特許請求の範囲】[Claims] (1)圧縮機と室外熱交換器とを有する室外ユニットと
、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空気調和装置において、室外熱交
換器の一端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
出管と接続された高圧ガス管と、前記吸込管と接続され
た低圧ガス管と、室外熱交換器の他端と接続された液管
とで構成して、各室内熱交換器の一端を前記高圧ガス管
には第1開閉弁を、且つ前記低圧ガス管には第2開閉弁
を夫々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、前記第2開閉弁と並列に冷媒絞り抵
抗を有するバイパス管及び/又は第3開閉弁を接続した
ことを特徴とする空気調和装置。
(1) In an air conditioner in which an outdoor unit having a compressor and an outdoor heat exchanger and multiple indoor units having indoor heat exchangers are connected by inter-unit piping, one end of the outdoor heat exchanger is connected to the compressor. The refrigerant discharge pipe and the refrigerant suction pipe are branched and connected via switching valves, while the inter-unit piping is connected to the high pressure gas pipe connected to the discharge pipe, the low pressure gas pipe connected to the suction pipe, and the outdoor heat pipe. a liquid pipe connected to the other end of the exchanger, one end of each indoor heat exchanger is connected to the high pressure gas pipe with a first on-off valve, and the low-pressure gas pipe with a second on-off valve, respectively. The liquid pipe is connected via a refrigerant pressure reducer, and a bypass pipe and/or a third on-off valve having a refrigerant throttling resistance is connected in parallel with the second on-off valve. Air conditioner.
JP63247848A 1988-09-30 1988-09-30 Air conditioner Expired - Lifetime JP2698118B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63247848A JP2698118B2 (en) 1988-09-30 1988-09-30 Air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63247848A JP2698118B2 (en) 1988-09-30 1988-09-30 Air conditioner

Publications (2)

Publication Number Publication Date
JPH0293263A true JPH0293263A (en) 1990-04-04
JP2698118B2 JP2698118B2 (en) 1998-01-19

Family

ID=17169562

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63247848A Expired - Lifetime JP2698118B2 (en) 1988-09-30 1988-09-30 Air conditioner

Country Status (1)

Country Link
JP (1) JP2698118B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0350457A (en) * 1989-07-17 1991-03-05 Daikin Ind Ltd Air conditioner
JPH04347467A (en) * 1991-05-27 1992-12-02 Mitsubishi Electric Corp Air conditioner
JP2001241798A (en) * 2000-03-01 2001-09-07 Sharp Corp Multizone air conditioner
JP2003279189A (en) * 2002-03-26 2003-10-02 Sanyo Electric Co Ltd Air conditioning device and solenoid valve unit used for the same
EP1437559A1 (en) 2003-01-13 2004-07-14 Lg Electronics Inc. Multi-type air conditioner
JP2007315706A (en) * 2006-05-26 2007-12-06 Hitachi Appliances Inc Air conditioner
CN100354578C (en) * 2004-10-02 2007-12-12 三星电子株式会社 Air conditioner and method of controlling the same
KR100840940B1 (en) * 2007-02-12 2008-06-24 삼성전자주식회사 Air conditioning system and control method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5781368U (en) * 1980-11-06 1982-05-19
JPS61110859A (en) * 1984-11-02 1986-05-29 ダイキン工業株式会社 Heat recovery type air conditioner

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5781368U (en) * 1980-11-06 1982-05-19
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 (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0350457A (en) * 1989-07-17 1991-03-05 Daikin Ind Ltd Air conditioner
JPH04347467A (en) * 1991-05-27 1992-12-02 Mitsubishi Electric Corp Air conditioner
JP2001241798A (en) * 2000-03-01 2001-09-07 Sharp Corp Multizone air conditioner
JP2003279189A (en) * 2002-03-26 2003-10-02 Sanyo Electric Co Ltd Air conditioning device and solenoid valve unit used for the same
EP1437559A1 (en) 2003-01-13 2004-07-14 Lg Electronics Inc. Multi-type air conditioner
US6952933B2 (en) 2003-01-13 2005-10-11 Lg Electronics Inc. Multi-type air conditioner
CN100354578C (en) * 2004-10-02 2007-12-12 三星电子株式会社 Air conditioner and method of controlling the same
JP2007315706A (en) * 2006-05-26 2007-12-06 Hitachi Appliances Inc Air conditioner
KR100840940B1 (en) * 2007-02-12 2008-06-24 삼성전자주식회사 Air conditioning system and control method thereof

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