JP2000111186A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for enhancing characteristics at the time of starting a heating operation to provide the conditioner capable of performing an optimum capability according to an operating state by being capable of altering a type of a compressor to an internal high pressure type or an internal low pressure type. SOLUTION: A compressor 1 has a motor 6 and a compressing unit 5 disposed in a sealed container 2. The container 2 is partitioned therein to a hermetically sealed motor chamber 4 and a discharge chamber 3. A suction tube 7 is connected to the unit 5, and a discharge tube 9 is connected to the chamber 4. A bypass passage 17 for communicating the chamber 3 with the tube 9 is provided. A branch tube 12 branched from the vicinity of a connector of the passage 17 to the chamber 3 is connected to the chamber 4. A first opening/closing valve (f) is provided at the passage 17, a first auxiliary opening/closing valve f' is provided at the tube 12, a second opening/closing valve 13 is provided to communicate the chamber 4 with the unit 5, and a third opening/closing valve 16 is provided to communicate the chamber 4 with the tube 9.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、空気調和装置に係
わり、より詳細には、運転状況に応じて圧縮機のタイプ
を変更可能としたものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly, to an air conditioner in which a type of a compressor can be changed according to an operating condition.

【０００２】[0002]

【従来の技術】従来の空気調和装置は、一例を図５
（Ａ）で示し、他の例を図５（Ｂ）で示すように、圧縮
機１と、流路切換弁Ａ、室外側熱交換器Ｂと、膨張弁Ｃ
と、室内側熱交換器Ｄとを順次連結して冷媒回路を形成
してなり、前記圧縮機１は、例えば図５（Ａ）で示す一
例のように、密閉容器２内に電動部６と圧縮部５とが配
置され、同密閉容器２内を気密な電動機室４と吐出室３
とに区画し、前記圧縮部５に吸込管7aを、前記電動機室
４に吐出管9aを夫々接続してなる構成であった。しかし
ながら、暖房運転開始時に、前記吸込管7aから前記圧縮
部５に吸入された冷媒が、前記電動機室４を経由し前記
吐出管9aから吐き出されて前記圧縮機１を内部高圧型と
なすことから、前記圧縮部５で高温となった冷媒温度が
前記電動機室４で低下してしまうために温風の吹き出し
が遅れることになって、所謂立上り特性が劣る空気調和
装置になってしまうという問題を有していた。2. Description of the Related Art An example of a conventional air conditioner is shown in FIG.
As shown in FIG. 5A and another example shown in FIG. 5B, the compressor 1, the flow path switching valve A, the outdoor heat exchanger B, and the expansion valve C
And the indoor heat exchanger D are sequentially connected to form a refrigerant circuit, and the compressor 1 includes a motor-driven unit 6 in a closed container 2 as shown in an example shown in FIG. A compression section 5 is disposed, and the inside of the closed container 2 is sealed with an electric motor chamber 4 and a discharge chamber 3.
And the suction pipe 7a is connected to the compression section 5 and the discharge pipe 9a is connected to the motor chamber 4. However, at the start of the heating operation, the refrigerant sucked into the compression section 5 from the suction pipe 7a is discharged from the discharge pipe 9a via the electric motor chamber 4 to make the compressor 1 an internal high pressure type. However, since the temperature of the refrigerant that has become high in the compression section 5 decreases in the electric motor chamber 4, the blowing of warm air is delayed, resulting in an air conditioner having poor so-called rising characteristics. Had.

【０００３】または、前記圧縮機１は、例えば図５
（Ｂ）で示す他の例のように、密閉容器２内に電動部６
と圧縮部５とが配置され、同密閉容器２内を気密な電動
機室４と吐出室３とに区画し、前記電動機室４に吸込管
7bを、前記吐出室３に吐出管9bを夫々接続してなる構成
であった。しかしながら、暖房運転時に、前記吸込管7b
から前記電動機室４を経て前記圧縮部５に吸入された冷
媒が、前記吐出管9aから吐き出されて前記圧縮機１を内
部低圧型となすことから、過剰な給油は冷凍サイクルの
性能を低下させてしまうほか、前記圧縮機１内の油が不
足して摺動部が焼き付く恐れがあった。Alternatively, the compressor 1 is, for example, shown in FIG.
As in the other example shown in FIG.
And a compression unit 5 are arranged, and the inside of the closed container 2 is partitioned into an airtight motor chamber 4 and a discharge chamber 3, and a suction pipe is provided in the motor chamber 4.
7b, a discharge pipe 9b is connected to the discharge chamber 3 respectively. However, during the heating operation, the suction pipe 7b
Since the refrigerant sucked into the compression section 5 through the motor chamber 4 is discharged from the discharge pipe 9a to make the compressor 1 an internal low-pressure type, excessive refueling lowers the performance of the refrigeration cycle. In addition, there is a possibility that the sliding portion may be seized due to lack of oil in the compressor 1.

【０００４】[0004]

【発明が解決しようとする課題】本発明においては、上
記の問題点に鑑み、運転状況に応じた圧縮機のタイプを
内部高圧型と内部低圧型とに変更可能にし、運転状況に
応じた最適な能力を発揮することのできる空気調和装置
を提供することを目的とするもので、更には、暖房運転
の立上り時の特性を高めた空気調和装置を提供すること
を目的とする。SUMMARY OF THE INVENTION In view of the above problems, the present invention makes it possible to change the type of compressor according to the operating condition between an internal high-pressure type and an internal low-pressure type, and to optimize the type according to the operating condition. It is an object of the present invention to provide an air conditioner capable of exhibiting excellent performance, and further to provide an air conditioner with improved characteristics at the start of heating operation.

【０００５】[0005]

【課題を解決するための手段】本発明は、上記課題を解
決するため、圧縮機と、流路切換弁と、室外側熱交換器
と、膨張弁と、室内側熱交換器とを順次連結し冷媒回路
を形成してなり、前記圧縮機は密閉容器内に電動部と圧
縮部とが配置され、同密閉容器内を気密な電動機室と吐
出室とに区画し、前記圧縮部に吸込管を、前記電動機室
に吐出管を夫々接続するとともに、前記吐出室と前記吐
出管とを連通するバイパス路を設け、前記電動機室に前
記バイパス路の前記吐出室との接続部近傍から分岐した
分岐管を接続し、前記バイパス路に第一開閉弁を、前記
分岐管に第一補助開閉弁を、前記電動機室から前記圧縮
部に連なる流入口に第二開閉弁を、前記電動機室から前
記吐出管に連なる吐出口に第三開閉弁を夫々設けた構成
となっている。In order to solve the above-mentioned problems, the present invention sequentially connects a compressor, a flow path switching valve, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger. The compressor is provided with a motor unit and a compression unit disposed in a closed container, the closed container is partitioned into an airtight motor room and a discharge chamber, and a suction pipe is provided in the compressor unit. A discharge pipe is connected to the motor chamber, and a bypass path is provided for communicating the discharge chamber with the discharge pipe. The motor chamber is branched from a vicinity of a connection portion of the bypass path with the discharge chamber. A pipe is connected, a first opening / closing valve is connected to the bypass passage, a first auxiliary opening / closing valve is connected to the branch pipe, a second opening / closing valve is connected to an inlet connected to the compression section from the motor chamber, and the discharge port is connected to the discharge chamber. A third opening / closing valve is provided at each of the discharge ports connected to the pipe.

【０００６】また、冷房運転時に、前記第一補助開閉弁
と、第三開閉弁とを開放する一方、前記第一開閉弁と、
第二開閉弁とを閉塞し、前記吸込管から前記圧縮部に吸
入された冷媒を、前記吐出室、前記分岐管、前記電動機
室、前記吐出口を順次経由し、前記吐出管から吐き出す
ようにして前記圧縮機を内部高圧型となし、暖房運転開
始時に、前記第一開閉弁を開放する一方、前記第一補助
開閉弁と、前記第二開閉弁と、前記第三開閉弁とを閉塞
し、前記吸込管から前記圧縮部に吸入された冷媒を、前
記バイパス路を経由し前記吐出管から吐き出すようにし
て前記圧縮機を内部低圧型となし、暖房運転時に、前記
第一補助開閉弁と、第三開閉弁とを開放する一方、前記
第一開閉弁と、第二開閉弁とを閉塞し、前記吸込管から
前記圧縮部に吸入された冷媒を、前記吐出室、前記分岐
管、前記電動機室、前記吐出口を順次経由し、前記吐出
管から吐き出すようにして前記圧縮機を内部高圧型とな
した構成となっている。Further, during the cooling operation, the first auxiliary on-off valve and the third on-off valve are opened, while the first on-off valve,
The second on-off valve is closed, and the refrigerant sucked into the compression section from the suction pipe is discharged from the discharge pipe through the discharge chamber, the branch pipe, the electric motor chamber, and the discharge port sequentially. The compressor is an internal high pressure type, and at the start of the heating operation, the first on-off valve is opened, while the first auxiliary on-off valve, the second on-off valve, and the third on-off valve are closed. The refrigerant sucked into the compression section from the suction pipe, the compressor is an internal low-pressure type by discharging from the discharge pipe via the bypass path, during the heating operation, the first auxiliary opening and closing valve, While opening the third on-off valve, the first on-off valve and the second on-off valve are closed, and the refrigerant sucked from the suction pipe into the compression unit is supplied to the discharge chamber, the branch pipe, Discharge from the discharge pipe through the motor chamber and the discharge port in order. A manner has a configuration in which the compressor has no internal pressure type.

【０００７】また、前記第一開閉弁と、前記第一補助開
閉弁とが夫々電磁弁からなる構成となっている。The first on-off valve and the first auxiliary on-off valve are each constituted by a solenoid valve.

【０００８】また、前記第二開閉弁と前記前記第三開閉
弁とが、逆止弁からなる構成となっている。[0008] Further, the second on-off valve and the third on-off valve are constituted by check valves.

【０００９】また、前記第一補助開閉弁は、前記第一開
閉弁が開放するのに連動して閉塞し、閉塞するのに連動
して開放するようにした構成となっている。The first auxiliary on-off valve is configured to close in conjunction with the opening of the first on-off valve, and to open in conjunction with the closing.

【００１０】更に、前記圧縮機を、スクロール型圧縮機
としてなる構成となっている。Further, the compressor is configured as a scroll compressor.

【００１１】[0011]

【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいた実施例として詳細に説明する。図１乃至図４
において、１は圧縮機、Ａは流路切換弁、Ｂは室外側熱
交換器、Ｃは膨張弁、Ｄは室内側熱交換器で、これらは
順次連結されて冷媒回路が形成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as examples. 1 to 4
, 1 is a compressor, A is a flow path switching valve, B is an outdoor heat exchanger, C is an expansion valve, and D is an indoor heat exchanger, which are sequentially connected to form a refrigerant circuit.

【００１２】前記圧縮機１は密閉容器２内に電動部６と
圧縮部５とが配置され、同密閉容器２内を気密な電動機
室４と吐出室３とに区画し、前記圧縮部５に吸込管７
を、前記電動機室４に吐出管９を夫々接続するととも
に、前記吐出室３と前記吐出管９とを連通するバイパス
路17を設け、前記電動機室４に前記バイパス路17の前記
吐出室３との接続部近傍から分岐した分岐管12を接続
し、前記バイパス路17に第一開閉弁ｆを、前記分岐管12
に第一補助開閉弁f'を、前記電動機室４から前記圧縮部
５に連なる流入口に第二開閉弁13を、前記電動機室４か
ら前記吐出管９に連なる吐出口に第三開閉弁16を夫々設
けた構成となっている。なお、前記第二開閉弁13は、ば
ね14によって前記流入口を常時開放する方向に付勢され
ており、前記電動機室４が高圧となった場合、圧力差に
よって前記流入口が閉じられるようにした構成となって
いる。In the compressor 1, an electric motor unit 6 and a compressor unit 5 are arranged in a closed container 2, and the inside of the closed container 2 is divided into an airtight motor room 4 and a discharge chamber 3, and the compressor unit 5 Suction pipe 7
Is connected to the motor chamber 4 with a discharge pipe 9 respectively, and a bypass path 17 is provided for communicating the discharge chamber 3 with the discharge pipe 9, and the discharge chamber 3 of the bypass path 17 is connected to the motor chamber 4. Is connected to the branch pipe 12 from the vicinity of the connection portion, and the first on-off valve f is connected to the bypass passage 17 by the branch pipe 12.
The first auxiliary opening / closing valve f ', the second opening / closing valve 13 at the inflow port connected from the motor chamber 4 to the compression section 5, the third opening / closing valve 16 at the discharge port connecting the motor chamber 4 to the discharge pipe 9. Are provided respectively. The second on-off valve 13 is urged by a spring 14 in a direction to always open the inflow port. When the electric motor chamber 4 becomes high pressure, the inflow port is closed by a pressure difference. The configuration is as follows.

【００１３】前記冷媒回路に、上記に説明した構成でな
る前記圧縮機１を連結したことにより、冷房運転時に、
図１で示すように、前記第一補助開閉弁f'と、第三開閉
弁16とを開放する一方、前記第一開閉弁ｆと、第二開閉
弁13とを閉塞し、前記吸込管７から前記圧縮部５に吸入
された冷媒を、前記吐出室３、前記分岐管12、前記電動
機室４、前記吐出口を順次経由し、前記吐出管９から吐
き出すようにし前記圧縮機１を内部高圧型となすように
して、内部低圧型に比して、性能のよい定常運転を行え
るようにした構成となっている。[0013] By connecting the compressor 1 having the above-described configuration to the refrigerant circuit, during the cooling operation,
As shown in FIG. 1, the first auxiliary on-off valve f ′ and the third on-off valve 16 are opened, while the first on-off valve f and the second on-off valve 13 are closed, and the suction pipe 7 is opened. The refrigerant sucked into the compression unit 5 is discharged from the discharge pipe 9 through the discharge chamber 3, the branch pipe 12, the electric motor chamber 4, and the discharge port in order, so that the compressor 1 has an internal high pressure. The structure is such that a steady operation with better performance can be performed as compared with the internal low pressure type.

【００１４】また、暖房運転開始時に、図２で示すよう
に、前記第一開閉弁ｆを開放する一方、前記第一補助開
閉弁f'と、前記第二開閉弁13と、前記第三開閉弁16とを
閉塞し、前記吸込管７から前記圧縮部５に吸入された冷
媒を、前記バイパス路17を経由し前記吐出管９から吐き
出すようにし前記圧縮機１を内部低圧型となすようにし
て、上記に説明した従来技術のように、前記圧縮部５で
高温となった冷媒温度が前記電動機室４で低下してしま
うということがなくなることにより、例えば、内部高圧
型の圧縮機を使用した場合に温風吹き出しまでの所要時
間が約三分間であったのに対し、本願の構成によりこれ
を約一分間に短縮できるようになって、所謂立上り特性
を大幅に向上できるようにした構成となっている。When the heating operation is started, as shown in FIG. 2, the first on-off valve f is opened, the first auxiliary on-off valve f ', the second on-off valve 13, the third on-off valve The valve 16 is closed so that the refrigerant sucked into the compression section 5 from the suction pipe 7 is discharged from the discharge pipe 9 via the bypass passage 17 so that the compressor 1 is of an internal low pressure type. In addition, since the refrigerant temperature that has become high in the compression section 5 does not drop in the electric motor chamber 4 as in the above-described related art, for example, an internal high-pressure type compressor is used. In this case, the time required for blowing hot air was about three minutes, whereas the structure of the present application allowed the time to be shortened to about one minute, so that the so-called rising characteristics could be greatly improved. It has become.

【００１５】また、暖房運転時に、図３で示すように、
前記第一補助開閉弁f'と、第三開閉弁16とを開放する一
方、前記第一開閉弁ｆと、第二開閉弁13とを閉塞し、前
記吸込管７から前記圧縮部５に吸入された冷媒を、前記
吐出室３、前記分岐管12、前記電動機室４、前記吐出口
を順次経由し、前記吐出管９から吐き出すようにし前記
圧縮機１を内部高圧型となすようにして、内部低圧型に
比して、上記に説明した冷房運転時の場合と同様に、性
能のよい定常運転を行えるようにした構成となってい
る。In the heating operation, as shown in FIG.
The first auxiliary on-off valve f ′ and the third on-off valve 16 are opened, while the first on-off valve f and the second on-off valve 13 are closed, and suction from the suction pipe 7 into the compression section 5 is performed. The discharged refrigerant passes through the discharge chamber 3, the branch pipe 12, the electric motor chamber 4, and the discharge port in order, and is discharged from the discharge pipe 9, so that the compressor 1 has an internal high-pressure type. Compared to the internal low-pressure type, the configuration is such that a high-performance steady operation can be performed as in the case of the cooling operation described above.

【００１６】また、前記第一開閉弁ｆと、前記第一補助
開閉弁f'とが夫々電磁弁からなる構成となっており、こ
れによって、図１乃至図３に基づいて上記に説明した冷
房運転時、暖房運転開始時および暖房運転時の前記冷媒
回路を夫々正確に形成できるようにした構成となってい
る。Further, the first opening / closing valve f and the first auxiliary opening / closing valve f ′ are each constituted by a solenoid valve, whereby the cooling described above with reference to FIGS. The refrigerant circuits at the time of operation, at the start of heating operation, and at the time of heating operation can be formed accurately.

【００１７】また、前記第二開閉弁13と前記第三開閉弁
16とが、逆止弁からなる構成となっており、これによっ
て、上記に説明した電磁弁と同様に、図１乃至図３に基
づいて上記に説明した冷房運転時、暖房運転開始時およ
び暖房運転時の冷媒流路を構成すべく、前記冷媒回路を
夫々正確に形成できるようにした構成となっている。な
お、前記第三開閉弁16は、図４で示す逆止弁16' のよう
に、前記吐出管９に設けてもよい。The second on-off valve 13 and the third on-off valve
16 is constituted by a check valve, so that the cooling operation, the heating operation start, and the heating operation described above with reference to FIGS. In order to configure the refrigerant flow path during operation, the refrigerant circuits can be accurately formed. The third on-off valve 16 may be provided in the discharge pipe 9 like a check valve 16 'shown in FIG.

【００１８】更に、前記第一補助開閉弁f'は、前記第一
開閉弁ｆが開放するのに連動して閉塞し、閉塞するのに
連動して開放するようにしたことにより、図１乃至図３
に基づいて上記に説明した冷房運転時、暖房運転開始時
および暖房運転時の冷媒流路を構成すべく、前記冷媒回
路を更に正確に形成できるようにした構成となってい
る。Further, the first auxiliary opening / closing valve f 'is closed in conjunction with the opening of the first opening / closing valve f, and is opened in conjunction with the closing of the first opening / closing valve f. FIG.
In order to form the refrigerant flow paths at the time of the cooling operation, at the time of the heating operation start, and at the time of the heating operation described above, the refrigerant circuit can be formed more accurately.

【００１９】更に、前記圧縮機１を、スクロール型圧縮
機としてなる構成としたことにより、上記に説明したと
おり、運転状況に応じた最適な能力を効果的に発揮する
ことができるようになる。Further, by configuring the compressor 1 as a scroll type compressor, as described above, it is possible to effectively exert the optimum capacity according to the operating conditions.

【００２０】以上の構成により、図１乃至図４で示すよ
うに、冷房運転時および暖房運転時に性能のよい定常運
転を行えるようになるとともに、とくに、暖房運転開始
時に、上記に説明した従来技術のように、前記圧縮部５
で高温となった冷媒温度が前記電動機室４で低下してし
まうということがなくなることにより、所謂立上り特性
を大幅に向上できるようにした空気調和装置となる。With the above arrangement, as shown in FIGS. 1 to 4, a high-performance steady operation can be performed during the cooling operation and the heating operation. In particular, at the start of the heating operation, the prior art described above is used. As shown in FIG.
By preventing the refrigerant temperature, which has become high in the above, from being lowered in the electric motor chamber 4, the air conditioner is capable of greatly improving the so-called rising characteristics.

【００２１】[0021]

【発明の効果】以上説明したように、本発明によれば、
運転状況に応じた圧縮機のタイプを内部高圧型と内部低
圧型とに変更可能にし、運転状況に応じた最適な能力を
発揮することのできる空気調和装置となって、更には、
暖房運転の立上り時の特性を高めた空気調和装置とな
る。As described above, according to the present invention,
An air conditioner that can change the type of compressor according to operating conditions to an internal high-pressure type and an internal low-pressure type, and can exhibit optimal performance according to operating conditions,
An air conditioner with improved characteristics at the start of heating operation.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明による空気調和装置をなす冷凍サイクル
を示す図であり冷房運転の状態を示す。FIG. 1 is a diagram showing a refrigeration cycle constituting an air conditioner according to the present invention, showing a state of a cooling operation.

【図２】本発明による空気調和装置をなす冷凍サイクル
を示す図であり暖房運転開始時の状態を示す。FIG. 2 is a diagram showing a refrigeration cycle of the air conditioner according to the present invention, showing a state at the time of starting a heating operation.

【図３】本発明による空気調和装置をなす冷凍サイクル
を示す図であり暖房運転の状態を示す。FIG. 3 is a diagram showing a refrigeration cycle constituting an air conditioner according to the present invention, showing a state of a heating operation.

【図４】本発明による空気調和装置をなす冷凍サイクル
に使用される圧縮機の断面図である。FIG. 4 is a cross-sectional view of a compressor used in a refrigeration cycle forming an air conditioner according to the present invention.

【図５】従来例による空気調和装置をなす冷凍サイクル
を示す図で、（Ａ）は内部高圧型の圧縮機を使用した一
例を示し、（Ａ）は内部低圧型の圧縮機を使用した他の
例を示す。FIG. 5 is a diagram showing a refrigeration cycle forming an air conditioner according to a conventional example, wherein (A) shows an example using an internal high-pressure type compressor, and (A) shows an example using an internal low-pressure type compressor. Here is an example.

【符号の説明】[Explanation of symbols]

１ 圧縮機 ２ 密閉容器 ３ 吐出室 ４ 電動機室 ５ 圧縮部 ６ 電動機 ７ 吸込管 ９ 吐出管 12 分岐管 13 第二開閉弁 14 ばね 16 第三開閉弁 16' 逆止弁 17 バイパス路 Ａ 流路切換弁 Ｂ 室外側熱交換器 Ｃ 膨張弁 Ｄ 室内側熱交換器 ｆ 第一開閉弁 f' 第一補助開閉弁 DESCRIPTION OF SYMBOLS 1 Compressor 2 Airtight container 3 Discharge chamber 4 Electric motor room 5 Compressor 6 Electric motor 7 Suction pipe 9 Discharge pipe 12 Branch pipe 13 Second on-off valve 14 Spring 16 Third on-off valve 16 'Check valve 17 Bypass path A Flow path switching Valve B Outdoor heat exchanger C Expansion valve D Indoor heat exchanger f First on-off valve f 'First auxiliary on-off valve

───────────────────────────────────────────────────── フロントページの続き (72)発明者 荒木 誠 川崎市高津区末長1116番地 株式会社富士 通ゼネラル内 (72)発明者 藤野 正樹 川崎市高津区末長1116番地 株式会社富士 通ゼネラル内 (72)発明者 嶋田 哲 川崎市高津区末長1116番地 株式会社富士 通ゼネラル内 (72)発明者 竹田 周司 川崎市高津区末長1116番地 株式会社富士 通ゼネラル内 (72)発明者 友田 裕基 川崎市高津区末長1116番地 株式会社富士 通ゼネラル内 (72)発明者 白石 満 川崎市高津区末長1116番地 株式会社富士 通ゼネラル内 (72)発明者 中村 圭一 川崎市高津区末長1116番地 株式会社富士 通ゼネラル内 (72)発明者 稲垣 雄史 川崎市高津区末長1116番地 株式会社富士 通ゼネラル内 Ｆターム(参考） 3H071 AA06 BB02 CC18 DD14 DD24 DD31 DD82 3L092 AA01 AA04 BA05 BA08 BA27 DA07 DA08 DA19 EA20 FA23 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Makoto Araki 1116 Suenaga, Takatsu-ku, Kawasaki City Inside Fujitsu General Limited (72) Inventor Masaki Fujino 1116, Suenaga, Takatsu-ku Kawasaki City Inside Fujitsu General Limited (72) Inventor Satoshi Shimada 1116 Suenaga, Takatsu-ku, Kawasaki-shi Inside Fujitsu General Co., Ltd. (72) Inventor Shuji Takeda 1116, Suenaga, Takatsu-ku Kawasaki-shi Inc. Address Fujitsu General Co., Ltd. (72) Inventor Mitsuru Shiraishi 1116 Suenaga, Takatsu-ku, Kawasaki City Inside Fujitsu General Co., Ltd. Inventor Yushi Inagaki 1116 Suenaga, Takatsu-ku, Kawasaki-shi F-ter within Fujitsu General Limited 3H071 AA06 BB02 CC18 DD14 DD24 DD31 DD82 3L092 AA01 AA04 BA05 BA08 BA27 DA07 DA08 DA19 EA20 FA23

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】 圧縮機と、流路切換弁と、室外側熱交換
器と、膨張弁と、室内側熱交換器とを順次連結し冷媒回
路を形成してなり、 前記圧縮機は密閉容器内に電動部と圧縮部とが配置さ
れ、同密閉容器内を気密な電動機室と吐出室とに区画
し、前記圧縮部に吸込管を、前記電動機室に吐出管を夫
々接続するとともに、前記吐出室と前記吐出管とを連通
するバイパス路を設け、前記電動機室に前記バイパス路
の前記吐出室との接続部近傍から分岐した分岐管を接続
し、前記バイパス路に第一開閉弁を、前記分岐管に第一
補助開閉弁を、前記電動機室から前記圧縮部に連なる流
入口に第二開閉弁を、前記電動機室から前記吐出管に連
なる吐出口に第三開閉弁を夫々設けたことを特徴とする
空気調和装置。1. A refrigerant circuit is formed by sequentially connecting a compressor, a flow path switching valve, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger to form a refrigerant circuit. A motorized section and a compression section are arranged therein, and the sealed container is partitioned into an airtight motor chamber and a discharge chamber, and a suction pipe is connected to the compression section, and a discharge pipe is connected to the motor chamber, respectively. A bypass path communicating the discharge chamber and the discharge pipe is provided, a branch pipe branched from a vicinity of a connection portion of the bypass path with the discharge chamber is connected to the motor chamber, and a first on-off valve is connected to the bypass path. A first auxiliary on-off valve is provided on the branch pipe, a second on-off valve is provided at an inflow port connected from the motor chamber to the compression section, and a third on-off valve is provided at a discharge port connected from the motor chamber to the discharge pipe. An air conditioner characterized by the following. 【請求項２】 冷房運転時に、前記第一補助開閉弁と、
第三開閉弁とを開放する一方、前記第一開閉弁と、第二
開閉弁とを閉塞し、前記吸込管から前記圧縮部に吸入さ
れた冷媒を、前記吐出室、前記分岐管、前記電動機室、
前記吐出口を順次経由し、前記吐出管から吐き出すよう
にして前記圧縮機を内部高圧型となし、 暖房運転開始時に、前記第一開閉弁を開放する一方、前
記第一補助開閉弁と、前記第二開閉弁と、前記第三開閉
弁とを閉塞し、前記吸込管から前記圧縮部に吸入された
冷媒を、前記バイパス路を経由し前記吐出管から吐き出
すようにして前記圧縮機を内部低圧型となし、 暖房運転時に、前記第一補助開閉弁と、第三開閉弁とを
開放する一方、前記第一開閉弁と、第二開閉弁とを閉塞
し、前記吸込管から前記圧縮部に吸入された冷媒を、前
記吐出室、前記分岐管、前記電動機室、前記吐出口を順
次経由し、前記吐出管から吐き出すようにして前記圧縮
機を内部高圧型となしたことを特徴とする請求項１に記
載の空気調和装置。2. During cooling operation, the first auxiliary on-off valve;
While opening the third on-off valve, the first on-off valve and the second on-off valve are closed, and the refrigerant sucked into the compression section from the suction pipe is supplied to the discharge chamber, the branch pipe, and the electric motor. Room,
The compressor is of an internal high-pressure type so as to discharge from the discharge pipe sequentially through the discharge port, and at the time of starting the heating operation, while opening the first on-off valve, the first auxiliary on-off valve, The second on-off valve and the third on-off valve are closed, and the refrigerant sucked into the compression section from the suction pipe is discharged from the discharge pipe through the bypass passage so that the compressor has an internal low pressure. During the heating operation, the first auxiliary on-off valve and the third on-off valve are opened, while the first on-off valve and the second on-off valve are closed, and the suction pipe is connected to the compression section. The compressor is an internal high-pressure type so that the sucked refrigerant is discharged from the discharge pipe through the discharge chamber, the branch pipe, the electric motor chamber, and the discharge port in order. Item 7. The air conditioner according to Item 1. 【請求項３】 前記第一開閉弁と、前記第一補助開閉弁
とが夫々電磁弁からなることを特徴とする請求項１また
は請求項２に記載の空気調和装置。3. The air-conditioning apparatus according to claim 1, wherein the first on-off valve and the first auxiliary on-off valve each comprise a solenoid valve. 【請求項４】 前記第二開閉弁と前記前記第三開閉弁と
が、逆止弁からなることを特徴とする請求項１または請
求項２に記載の空気調和装置。4. The air conditioner according to claim 1, wherein the second on-off valve and the third on-off valve comprise a check valve. 【請求項５】 前記第一補助開閉弁は、前記第一開閉弁
が開放するのに連動して閉塞し、閉塞するのに連動して
開放するようにしたことを特徴とする請求項１または請
求項２に記載の空気調和装置。5. The system according to claim 1, wherein the first auxiliary on-off valve is closed in conjunction with the opening of the first on-off valve, and is opened in conjunction with the closing. The air conditioner according to claim 2. 【請求項６】 前記圧縮機を、スクロール型圧縮機とし
てなることを特徴とする請求項１または請求項２に記載
の空気調和装置。6. The air conditioner according to claim 1, wherein the compressor is a scroll compressor.