JPH0737102Y2 - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH0737102Y2 JPH0737102Y2 JP8291190U JP8291190U JPH0737102Y2 JP H0737102 Y2 JPH0737102 Y2 JP H0737102Y2 JP 8291190 U JP8291190 U JP 8291190U JP 8291190 U JP8291190 U JP 8291190U JP H0737102 Y2 JPH0737102 Y2 JP H0737102Y2
- Authority
- JP
- Japan
- Prior art keywords
- receiver
- refrigerant
- heat exchanger
- electric expansion
- expansion valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、液管にレシーバを配置した空気調和装置に係
り、特にレシーバの液貯溜機能の向上対策に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an air conditioner in which a receiver is arranged in a liquid pipe, and more particularly to measures for improving the liquid storage function of the receiver.
（従来の技術） 従来より、第２図に示すように、圧縮機（ａ）、熱源側
熱交換器（ｂ）、減圧部（ｃ）及び利用側熱交換器
（ｄ）を冷媒配管（ｅ）で順次接続してなる冷媒回路
（ｆ）を備え、かつ四路切換弁（ｇ）により冷媒回路
（ｆ）のサイクルを切換えるようにした空気調和装置に
おいて、上記減圧部（ｃ）を、液冷媒を貯溜するレシー
バ（ｒ）と、該レシーバ（ｒ）の下部に接続される電動
膨張弁（ev）とを備え、このレシーバ（ｒ）と電動膨張
弁（ev）とを接続する共通路（ho）のレシーバ（ｒ）の
上部側の端部と熱源側熱交換器（ｂ）との間、及びレシ
ーバ（ｒ）の上部と利用側熱交換器（ｄ）との間をそれ
ぞれレシーバ（ｒ）への冷媒の流入のみを許容する逆止
弁(i1),(i2)を介して第1,第２高圧通路(h1),(h2)により
接続し、電動膨張弁（ev）の他端と熱源側熱交換器
（ｂ）との間、及び電動膨張弁（ev）の他端と利用側熱
交換器（ｄ）との間をそれぞれ電動膨張弁（ev）からの
冷媒の流出のみを許容する第3,第４逆止弁(i3),(i4)を
介して第1,第２低圧通路(h3),(h4)により接続して構成
するとともに、上記第２高圧通路(h2)において、第１逆
止弁(i2)をバイパスする液封防止バイパス路(h5)をキャ
ピラリチューブ（cp）を介して設けることにより、空気
調和装置の冷暖房運転時におけるレシーバ（ｒ）及び電
動膨張弁（ev）の冷媒の貯溜機能及び減圧機能を良好に
維持し、かつ圧縮機（ａ）の停止時における液封を防止
しようとするものは一般的な構成である。(Prior Art) Conventionally, as shown in FIG. 2, a compressor (a), a heat source side heat exchanger (b), a pressure reducing section (c) and a use side heat exchanger (d) are connected to a refrigerant pipe (e). ), A refrigerant circuit (f) sequentially connected, and a four-way switching valve (g) for switching the cycle of the refrigerant circuit (f). A receiver (r) for storing refrigerant and an electric expansion valve (ev) connected to a lower portion of the receiver (r) are provided, and a common path (connecting the receiver (r) and the electric expansion valve (ev) ( ho) between the upper end of the receiver (r) and the heat source side heat exchanger (b), and between the upper part of the receiver (r) and the utilization side heat exchanger (d), respectively. a check valve (i 1) for allowing only the refrigerant to flow into), (first, second high pressure passage via the i 2) (h 1), connected by a (h 2), an electric The electric expansion valve (ev) is connected between the other end of the tension valve (ev) and the heat source side heat exchanger (b) and between the other end of the electric expansion valve (ev) and the utilization side heat exchanger (d). ) Is connected by the first and second low pressure passages (h 3 ), (h 4 ) via the third and fourth check valves (i 3 ), (i 4 ) which allow only the outflow of the refrigerant from In addition to the above, the second high pressure passage (h 2 ) is provided with a liquid-sealing prevention bypass passage (h 5 ) that bypasses the first check valve (i 2 ) via a capillary tube (cp). An object of the present invention is to satisfactorily maintain the refrigerant storage function and the pressure reduction function of the receiver (r) and the electric expansion valve (ev) during the heating and cooling operation of the harmony device, and to prevent liquid sealing when the compressor (a) is stopped. Is a general configuration.
（考案が解決しようとする課題） しかしながら、上記従来ものにおいて、周囲温度が冷媒
温度より高い場合、液冷媒が液封防止バイパス路(h5)を
経てレシーバ（ｒ）から低温部に流れ、レシーバ（ｒ）
がガス冷媒のみになることがあった。そして、この状態
で、圧縮機（ａ）を起動すると、液冷媒がレシーバ
（ｒ）に流れようとするが、ガス冷媒に妨害されてレシ
ーバ（ｒ）ではなく凝縮器（ｂ又はｄ）に貯溜し、高圧
が過上昇して高圧圧力開閉器の作動を招く虞れがあっ
た。(Problems to be solved by the invention) However, in the above-mentioned conventional device, when the ambient temperature is higher than the refrigerant temperature, the liquid refrigerant flows from the receiver (r) to the low temperature section through the liquid seal prevention bypass passage (h 5 ), (R)
Was sometimes the only gas refrigerant. Then, when the compressor (a) is started in this state, the liquid refrigerant tries to flow to the receiver (r), but is blocked by the gas refrigerant and stored in the condenser (b or d) instead of the receiver (r). However, there is a risk that the high pressure will rise excessively and cause the operation of the high pressure switch.
本考案は斯かる点に鑑みてなされたものであり、その目
的は、レシーバからガス冷媒を移動させうる構成とする
ことにより、周囲温度が高いときにも、サイクル切換時
におけるレシーバの液冷媒貯溜機能を維持することにあ
る。The present invention has been made in view of such a point, and an object thereof is to make a liquid refrigerant reservoir of the receiver at the time of cycle switching even when the ambient temperature is high by adopting a configuration capable of moving the gas refrigerant from the receiver. It is to maintain the function.
（課題を解決するための手段） 上記目的を達成するため本考案の解決手段は、液封防止
回路にガス抜き機能を兼備させることにある。(Means for Solving the Problem) In order to achieve the above object, the solution means of the present invention is to make the liquid-sealing prevention circuit also have a gas venting function.
具体的には、第１図に示すように、圧縮機（１）、熱源
側熱交換器（３）、減圧部（50）及び利用側熱交換器
（６）を接続し、正逆サイクルに切換え可能な冷媒回路
（９）を備えた空気調和装置を対象とする。Specifically, as shown in FIG. 1, the compressor (1), the heat source side heat exchanger (3), the decompression section (50) and the use side heat exchanger (6) are connected to each other, and the forward and reverse cycles are performed. An air conditioner with a switchable refrigerant circuit (9) is targeted.
そして、上記減圧部（50）を、液冷媒を貯留するための
レシーバ（４）と、一端が該レシーバ（４）の下部に接
続された電動膨張弁（５）とを備え、かつ上記レシーバ
（４）の上部を上記熱源側熱交換器（３）との間及びレ
シーバ（４）の上部と利用側熱交換器（６）との間をそ
れぞれ上記各熱交換器（３），（６）からレシーバ
（４）への冷媒の流通のみを許容する第1,第２逆止弁(D
1),(D2)を介して接続し、上記電動膨張弁（５）の他端
と熱源側熱交換器（３）との間及び電動膨張弁（５）の
他端と利用側熱交換器（６）との間をそれぞれ電動膨張
弁（５）から各熱交換器（３），（６）への冷媒を流通
のみを許容する第3,第４逆止弁(D3),(D4)を介して接続
することにより構成する。The pressure reducing section (50) includes a receiver (4) for storing the liquid refrigerant, and an electric expansion valve (5) having one end connected to a lower portion of the receiver (4), and the receiver (4). The upper part of 4) is between the heat source side heat exchanger (3) and the upper part of the receiver (4) and the use side heat exchanger (6) are the heat exchangers (3) and (6), respectively. From the first to second check valves (D
1 ) and (D 2 ) to connect between the other end of the electric expansion valve (5) and the heat source side heat exchanger (3) and the other end of the electric expansion valve (5) and the use side heat exchange The third and fourth check valves (D 3 ), () that allow only the refrigerant to flow from the electric expansion valve (5) to the heat exchangers (3), (6) respectively with the device (6). It is configured by connecting via D 4 ).
さらに、上記レシーバ（４）の上部と電動膨張弁（５）
他端側の液管との間を、電動膨張弁（５）よりも大きい
減圧度を有するキャピラリチューブ（Ｃ）を介して接続
する構成としたものである。Further, the upper part of the receiver (4) and the electric expansion valve (5)
The liquid pipe on the other end side is connected via a capillary tube (C) having a degree of pressure reduction larger than that of the electric expansion valve (5).
（作用） 以上の構成により、本考案では、空気調和装置の運転
時、減圧部（50）で冷媒の減圧が行われ所定の空調能力
が確保される一方、圧縮機（１）の停止時、キャピラリ
チューブ（Ｃ）を介してレシーバ（４）から冷媒が移動
可能になされているので、液封が防止される。(Operation) According to the present invention, according to the present invention, when the air conditioner is in operation, the decompression unit (50) decompresses the refrigerant to ensure a predetermined air conditioning capacity, and when the compressor (1) is stopped, Since the refrigerant can be moved from the receiver (4) through the capillary tube (C), liquid sealing is prevented.
そのとき、レシーバ（４）の周囲温度が高いときには、
液冷媒が低温部に移動してレシーバ（４）にはガス冷媒
のみが充満するため、圧縮機（１）の再起動時、液冷媒
のレシーバ（４）への貯溜が阻止され、凝縮器（３又は
６）に滞留して高圧の過上昇を招く虞れがあるが、本考
案では、レシーバ（４）の上部からキャピラリチューブ
（Ｃ）を介してガス冷媒が抜けるので、液冷媒がレシー
バ（４）に流入して貯溜される。したがって、液封の防
止機能を維持しながら、ガス抜きの機能発揮により、高
圧の過上昇が防止されることになる。At that time, when the ambient temperature of the receiver (4) is high,
Since the liquid refrigerant moves to the low temperature part and the receiver (4) is filled with only the gas refrigerant, when the compressor (1) is restarted, the liquid refrigerant is prevented from being stored in the receiver (4) and the condenser ( 3 or 6) and may cause an excessive rise in high pressure. However, in the present invention, since the gas refrigerant escapes from the upper portion of the receiver (4) through the capillary tube (C), the liquid refrigerant is It flows into 4) and is stored. Therefore, while maintaining the function of preventing liquid sealing, the high pressure is prevented from rising excessively by the function of degassing.
（実施例） 以下、本考案の実施例について、第１図に基づき説明す
る。(Embodiment) An embodiment of the present invention will be described below with reference to FIG.
第１図は本考案を適用した空気調和装置の冷媒配管系統
を示し、（１）は圧縮機、（２）は冷房運転時には図中
実線のごとく、暖房運転時には図中破線のごとく切換わ
る四路切換弁、（３）は冷房運転時には凝縮器として、
暖房運転時には蒸発器として機能する熱源側熱交換器で
ある室外熱交換器、（50）は冷媒を減圧するための減圧
部、（６）は室内に設置され、冷房運転時には蒸発器と
して、暖房運転時には凝縮器として機能する利用側熱交
換器である室内熱交換器、（７）は圧縮機（１）の吸入
管に介設され、吸入冷媒中の液冷媒を除去するためのア
キュムレータである。Fig. 1 shows a refrigerant piping system of an air conditioner to which the present invention is applied. (1) is a compressor, (2) is a solid line in the figure during cooling operation, and a dashed line in the figure during heating operation. The switching valve, (3) is a condenser during cooling operation,
An outdoor heat exchanger, which is a heat-source-side heat exchanger that functions as an evaporator during heating operation, (50) is a decompression unit for decompressing the refrigerant, (6) is installed indoors, and as an evaporator during heating operation, heating is performed. An indoor heat exchanger, which is a utilization side heat exchanger that functions as a condenser during operation, and (7) is an accumulator that is provided in the suction pipe of the compressor (1) and removes the liquid refrigerant in the suction refrigerant. .
上記各機器は冷媒配管（８）により順次接続され、冷媒
の循環により熱移動を生ぜしめるようにした冷媒回路
（９）が構成されている。The above-mentioned devices are sequentially connected by a refrigerant pipe (8), and a refrigerant circuit (9) is configured so that heat is transferred by circulating the refrigerant.
ここで、上記減圧部（50）は、液冷媒を貯溜するための
レシーバ（４）と、液冷媒の減圧機能と流量調節機能と
を有する電動膨張弁（５）とを備えており、上記レシー
バ（４）と電動膨張弁（５）とは、電動膨張弁（５）が
レシーバ（４）の下部つまり液部に連通するよう共通路
（8a）に直列に配置されており、共通路（8a）のレシー
バ（４）上部側の端部である点（Ｐ）と室外熱交換器
（３）との間は、室外熱交換器（３）からレシーバ
（４）への冷媒の流通のみを許容する第１逆止弁(D1)を
介して第１流入路（8b）により、上記共通路（8a）の点
（Ｐ）と室内熱交換器（６）との間は室内熱交換器
（６）からレシーバ（４）への冷媒の流通のみを許容す
る第２逆止弁(D2)を介して第２流入路（8c）によりそれ
ぞれ接続されている一方、共通路（8a）の上記電動膨張
弁（５）他端側の端部である点（Ｑ）と上記第１逆止弁
(D1)−室外熱交換器（３）間の点（Ｓ）との間は電動膨
張弁（５）から室外熱交換器（３）への冷媒の流通のみ
を許容する第３逆止弁(D3)を介して第１流出路（8d）に
より、共通路（8a）の上記点（Ｑ）と上記第２逆止弁(D
2)−室内熱交換器（６）間の点（Ｒ）との間は電動膨張
弁（５）から室内熱交換器（６）への冷媒の流通のみを
許容する第４逆止弁(D4)を介して第２流出路（8e）によ
りそれぞれ接続されている。Here, the pressure reducing section (50) includes a receiver (4) for storing the liquid refrigerant, and an electric expansion valve (5) having a liquid refrigerant pressure reducing function and a flow rate adjusting function. The electric expansion valve (5) and the electric expansion valve (5) are arranged in series in the common path (8a) so that the electric expansion valve (5) communicates with the lower portion of the receiver (4), that is, the liquid portion. Between the outdoor heat exchanger (3) and the point (P) which is the end on the upper side of the receiver (4) of (1), only the flow of the refrigerant from the outdoor heat exchanger (3) to the receiver (4) is allowed. The indoor heat exchanger (6) is connected between the point (P) of the common path (8a) and the indoor heat exchanger (6) by the first inflow path (8b) via the first check valve (D 1 ). while it is connected by a second check valve that allows only the flow of refrigerant from 6) to the receiver (4) (second inflow channel via the D 2) (8c), a common path The electric expansion valve 8a) (5) that it is the end of the other end (Q) and the first check valve
A third check valve that allows only the flow of the refrigerant from the electric expansion valve (5) to the outdoor heat exchanger (3) between the point (S) between (D 1 ) and the outdoor heat exchanger (3). the first outflow path via the (D 3) by (8d), the point of the common passage (8a) (Q) and said second check valve (D
2 ) A fourth check valve (D) that allows only the refrigerant to flow from the electric expansion valve (5) to the indoor heat exchanger (6) between the point (R) between the indoor heat exchanger (6). 4 ) and are connected by the second outflow passage (8e).
上記冷媒回路（９）において、冷房運転時には、室外熱
交換器（３）で凝縮液化された液冷媒が第１逆止弁(D1)
を経てレシーバ（４）に貯溜され、電動膨張弁（５）で
減圧された後、第２流出路（8e）を経て室内熱交換器
（６）で蒸発して圧縮機（１）に戻る循環となる一方、
暖房運転時には、室内熱交換器（６）で凝縮液化された
液冷媒が第２逆止弁(D2)を経てレシーバ（４）に貯溜さ
れ、電動膨張弁（５）で減圧された後、第１流出路（8
d）を経て室外熱交換器（３）で蒸発して圧縮機（１）
に戻る循環となるように構成されている。In the refrigerant circuit (9), during cooling operation, the liquid refrigerant condensed and liquefied in the outdoor heat exchanger (3) is the first check valve (D 1 ).
After being stored in the receiver (4) via the flow path and decompressed by the electric expansion valve (5), it is evaporated in the indoor heat exchanger (6) via the second outflow passage (8e) and returned to the compressor (1). While,
During heating operation, the liquid refrigerant condensed and liquefied in the indoor heat exchanger (6) is stored in the receiver (4) through the second check valve (D 2 ), and is decompressed by the electric expansion valve (5). First outflow path (8
After passing through d), the heat is evaporated in the outdoor heat exchanger (3) and the compressor (1)
It is configured to return to circulation.
すなわち、上記レシーバ（４）、電動膨張弁（５）、第
１〜第４逆止弁(D1)〜(D4)、共通路（8a）、第1,第２流
入路（8b），（8c）及び第1,第２流出路（8d），（8e）
により、冷媒を減圧する減圧部（50）が構成されてい
る。That is, the receiver (4), the electric expansion valve (5), first to fourth check valves (D 1) ~ (D 4), the common passage (8a), first, second inflow channel (8b) (8c) and first and second outflow channels (8d), (8e)
This constitutes a decompression unit (50) for decompressing the refrigerant.
さらに、本考案の特徴として、上記レシーバ（４）の上
部から上記第２流出路（8e）の点（Ｑ）と第４逆止弁(D
4)間の点（Ｕ）との間には、キャピラリチューブ（Ｃ）
を介設してなる液封防止バイパス路（8f）が設けられて
いて、該液封防止バイパス路（8f）により、圧縮機
（１）の停止時における液封を防止するとともに、ガス
冷媒がレシーバ（４）上部から第２流出路（8e）側に移
動しうるようになされている。Further, as a feature of the present invention, a point (Q) of the second outflow passage (8e) and a fourth check valve (D) from the upper part of the receiver (4) are provided.
4 ) Between the point (U) and the capillary tube (C)
A liquid-sealing prevention bypass passage (8f) is provided, which prevents liquid-sealing when the compressor (1) is stopped and prevents gas refrigerant from flowing. It can move from the upper part of the receiver (4) to the second outflow passage (8e) side.
なお、上記キャピラリチューブ（Ｃ）の減圧度は電動膨
張弁（５）よりも大きくなるように設定されていて、通
常運転時における電動膨張弁（５）による冷媒流量調節
機能を良好に維持しうるようになされている。The degree of pressure reduction of the capillary tube (C) is set so as to be larger than that of the electric expansion valve (5), and the refrigerant flow rate adjusting function of the electric expansion valve (5) during normal operation can be favorably maintained. It is done like this.
したがって、上記実施例では、レシーバ（４）の上部か
ら第２流出路（8e）側、つまり電動膨張弁（５）の他端
側に液封防止バイパス路（8f）が設けられているので、
液封防止機能だけでなく、レシーバ（４）のガス抜き機
能をも発揮することができる。Therefore, in the above embodiment, since the liquid seal prevention bypass passage (8f) is provided from the upper part of the receiver (4) to the second outflow passage (8e) side, that is, the other end side of the electric expansion valve (5),
Not only the function of preventing liquid sealing but also the function of degassing the receiver (4) can be exerted.
すなわち、例えば冷房運転中で周囲温度が高いときに
は、圧縮機（１）の停止時、液冷媒がレシーバ（４）か
ら温度の低い室外熱交換器（凝縮器）（３）に移動し
て、レシーバ（４）内がガス冷媒で満たされることがあ
る。かかる場合、圧縮機（１）が再起動すると、冷媒回
路（９）に冷媒が循環しようとするが、液冷媒がレシー
バ（４）に流入しようとしても、ガス冷媒に妨害され
て、室外熱交換器（３）に多量に滞留することになり、
このため高圧が過上昇して、空気調和装置の異常停止を
招く虞れがあった。That is, for example, when the ambient temperature is high during cooling operation, when the compressor (1) is stopped, the liquid refrigerant moves from the receiver (4) to the outdoor heat exchanger (condenser) (3) having a low temperature, and the receiver (4) The inside may be filled with the gas refrigerant. In such a case, when the compressor (1) is restarted, the refrigerant tries to circulate in the refrigerant circuit (9), but even if the liquid refrigerant tries to flow into the receiver (4), it is obstructed by the gas refrigerant and the outdoor heat exchange is performed. A large amount will be retained in the vessel (3),
Therefore, the high pressure may excessively rise, which may cause an abnormal stop of the air conditioner.
ここで、本考案では、液封防止バイパス路（8f）を介し
てレシーバ（４）上部からガス冷媒が電動膨張弁（５）
の他端側に抜けるので、液冷媒が室外熱交換器（３）か
らレシーバ（４）に流入してレシーバ（４）に貯溜さ
れ、高圧の過上昇が防止されるのである。Here, in the present invention, the gas refrigerant flows from the upper part of the receiver (4) through the liquid-sealing bypass passage (8f) to the electric expansion valve (5).
The liquid refrigerant flows from the outdoor heat exchanger (3) into the receiver (4) and is stored in the receiver (4) to prevent the high pressure from rising excessively.
また、そのことにより、レシーバ（４）の周囲温度が凝
縮温度より高くなっても、液冷媒がレシーバ（４）に貯
溜されるので、レシーバ（４）の設置場所を自由に選定
しうるという設計上の利点もある。Further, as a result, even if the ambient temperature of the receiver (4) becomes higher than the condensation temperature, the liquid refrigerant is stored in the receiver (4), so that the installation place of the receiver (4) can be freely selected. There are also advantages.
なお、上記実施例では、液封防止バイパス路（8f）を第
２流出路（8e）に設けたが、本考案はかかる実施例に限
定されるものではなく、第１流出路（8d）や共通路（8
a）の電動膨張弁（５）下流側に設けてもよい。Although the liquid-sealing prevention bypass passage (8f) is provided in the second outflow passage (8e) in the above embodiment, the present invention is not limited to this embodiment, and the first outflow passage (8d) and Common road (8
It may be provided on the downstream side of the electric expansion valve (5) of a).
（考案の効果） 以上説明したように、本考案によれば、サイクルの可逆
な冷媒回路の減圧部の構成として、レシーバの下部と電
動膨張弁の一端とを接続し、レシーバの上部と熱源側熱
交換器及び利用側熱交換器との間をそれぞれ第1,第２逆
止弁を介して冷媒がレシーバに流入可能に接続し、電動
膨張弁の他端と熱源側熱交換器及び利用側熱交換器との
間をそれぞれ第3,第４逆止弁を介して冷媒がレシーバか
ら流出可能に接続するとともに、レシーバ上部と電動膨
張弁の他端との間をキャピラリチューブを介して接続し
たので、圧縮機停止時における液封防止機能と、レシー
バからのガス抜き機能とを発揮することができ、よっ
て、高圧の過上昇による異常停止を有効に回避すること
ができる。また、このことにより、レシーバの設置場所
の選定について、設計上の自由度の向上を図ることがで
きる。(Effect of the Invention) As described above, according to the present invention, the lower part of the receiver and one end of the electric expansion valve are connected, and the upper part of the receiver and the heat source side are connected as the structure of the pressure reducing part of the reversible refrigerant circuit of the cycle. Refrigerant is connected to the receiver via the first and second check valves, respectively, between the heat exchanger and the use side heat exchanger, and the other end of the electric expansion valve and the heat source side heat exchanger and the use side are connected. The refrigerant was connected to the heat exchanger via the third and fourth check valves so that the refrigerant could flow out from the receiver, and the upper part of the receiver and the other end of the electric expansion valve were connected via a capillary tube. Therefore, the function of preventing liquid sealing when the compressor is stopped and the function of venting gas from the receiver can be exerted, and thus abnormal stop due to excessive rise of high pressure can be effectively avoided. In addition, this makes it possible to improve the degree of freedom in designing the selection of the receiver installation location.
第１図は本考案の実施例に係る空気調和装置の構成を示
す冷媒配管系統図である。第２図は従来の空気調和装置
の構成を示す冷媒配管系統図である。 １……圧縮機 ３……室外熱交換器 （熱源側熱交換器） ４……レシーバ ５……電動膨張弁 ６……室内熱交換器 （利用側熱交換器） 8f……液封防止バイパス路 ９……冷媒回路 Ｃ……キャピラリチューブ (D1)〜(D4)……第１〜第４逆止弁FIG. 1 is a refrigerant piping system diagram showing a configuration of an air conditioner according to an embodiment of the present invention. FIG. 2 is a refrigerant piping system diagram showing a configuration of a conventional air conditioner. 1 …… Compressor 3 …… Outdoor heat exchanger (heat source side heat exchanger) 4 …… Receiver 5 …… Electric expansion valve 6 …… Indoor heat exchanger (use side heat exchanger) 8f …… Liquid seal prevention bypass Channel 9: Refrigerant circuit C: Capillary tube (D 1 ) to (D 4 ) ... 1st to 4th check valves
Claims (1)
圧部（50）及び利用側熱交換器（６）を接続し、正逆サ
イクルに切換え可能な冷媒回路（９）を備えた空気調和
装置において、 上記減圧部（50）は、液冷媒を貯留するためのレシーバ
（４）と、一端が該レシーバ（４）の下部に接続された
電動膨張弁（５）とを備え、かつ上記レシーバ（４）の
上部を上記熱源側熱交換器（３）との間及びレシーバ
（４）の上部と利用側熱交換器（６）との間をそれぞれ
上記各熱交換器（３），（６）からレシーバ（４）への
冷媒の流通のみを許容する第1,第２逆止弁(D1),(D2)を
介して接続し、上記電動膨張弁（５）の他端と熱源側熱
交換器（３）との間及び電動膨張弁（５）の他端と利用
側熱交換器（６）との間をそれぞれ電動膨張弁（５）か
ら各熱交換器（３），（６）への冷媒の流通のみを許容
する第3,第４逆止弁(D3),(D4)を介して接続して構成さ
れているとともに、 上記レシーバ（４）の上部と電動膨張弁（５）他端側の
液管との間は、電動膨張弁（５）よりも大きい減圧度を
有するキャピラリチューブ（Ｃ）を介して接続されてい
ることを特徴とする空気調和装置。1. A refrigerant circuit (9) capable of switching to a forward / reverse cycle by connecting a compressor (1), a heat source side heat exchanger (3), a pressure reducing section (50) and a use side heat exchanger (6). In the air conditioner provided with, the decompression section (50) includes a receiver (4) for storing the liquid refrigerant, and an electric expansion valve (5) having one end connected to a lower portion of the receiver (4). The heat exchangers (1) and (2) provided between the upper part of the receiver (4) and the heat source side heat exchanger (3) and between the upper part of the receiver (4) and the utilization side heat exchanger (6), respectively. 3), (6) are connected via the first and second check valves (D 1 ), (D 2 ) which allow only the flow of the refrigerant from the receiver (4) to the electric expansion valve (5). From the electric expansion valve (5) to the heat source side heat exchanger (3) and between the other end of the electric expansion valve (5) and the utilization side heat exchanger (6). Exchanger (3), third that allows only the flow of refrigerant to (6), fourth check valve (D 3), with which are connected via a (D 4), the receiver ( The upper part of 4) and the liquid pipe on the other end side of the electric expansion valve (5) are connected via a capillary tube (C) having a degree of pressure reduction larger than that of the electric expansion valve (5). Air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8291190U JPH0737102Y2 (en) | 1990-08-03 | 1990-08-03 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8291190U JPH0737102Y2 (en) | 1990-08-03 | 1990-08-03 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0439652U JPH0439652U (en) | 1992-04-03 |
| JPH0737102Y2 true JPH0737102Y2 (en) | 1995-08-23 |
Family
ID=31630137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8291190U Expired - Lifetime JPH0737102Y2 (en) | 1990-08-03 | 1990-08-03 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0737102Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015053178A1 (en) * | 2013-10-07 | 2015-04-16 | ダイキン工業株式会社 | Refrigeration device |
-
1990
- 1990-08-03 JP JP8291190U patent/JPH0737102Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015053178A1 (en) * | 2013-10-07 | 2015-04-16 | ダイキン工業株式会社 | Refrigeration device |
| JP2015075259A (en) * | 2013-10-07 | 2015-04-20 | ダイキン工業株式会社 | Refrigeration device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0439652U (en) | 1992-04-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |