JP2777477B2 - Refrigeration equipment - Google Patents
Refrigeration equipmentInfo
- Publication number
- JP2777477B2 JP2777477B2 JP31347890A JP31347890A JP2777477B2 JP 2777477 B2 JP2777477 B2 JP 2777477B2 JP 31347890 A JP31347890 A JP 31347890A JP 31347890 A JP31347890 A JP 31347890A JP 2777477 B2 JP2777477 B2 JP 2777477B2
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- outdoor heat
- heat exchanger
- pipe
- branch pipe
- 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 - Fee Related
Links
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Description
【発明の詳細な説明】 （イ）産業上の利用分野 この発明は冷凍装置に関する。The present invention relates to a refrigeration apparatus.
（ロ）従来の技術 冷凍装置の従来技術としては実開平１−51121号公報
に記載されたものがあり、この冷凍装置は室外熱交換器
が上下に配置されたものである。次にこの種の冷凍装置
の冷媒回路の一例を第５図に示し、この図に基づき説明
する。(B) Conventional technology As a conventional technology of a refrigeration system, there is one described in Japanese Utility Model Laid-Open No. 1-51121, and this refrigeration system has an outdoor heat exchanger arranged vertically. Next, an example of a refrigerant circuit of this type of refrigeration apparatus is shown in FIG. 5 and will be described with reference to FIG.
第５図において、（60）は圧縮機（61）と、四方弁を
用いた冷暖流路切換弁（62）と、並列接続された複数の
室外熱交換器（63）（64）と、キャピラリーチューブを
用いた減圧器（65）と、室内熱交換器（66）と、アキュ
ームレータ（67）とを順次配管接続した冷凍回路、（6
8）は圧縮機（61）の吐出ガスを室外熱交換器（63）（6
4）に導くためのバイパス管、（69）はこのバイパス管
の途中に設けられた開閉弁、（70）は室外熱交換器（6
3）と管（71）とを接続する管、（72）は室外熱交換器
（64）と管（71）とを接続する管、（73）は減圧器（6
5）とサービスバルブ（74）とを接続する管である。
尚、室外熱交換器（63）（64）は上下に配置されてい
る。In FIG. 5, reference numeral (60) denotes a compressor (61), a cooling / heating passage switching valve (62) using a four-way valve, a plurality of outdoor heat exchangers (63) (64) connected in parallel, and a capillary. A refrigeration circuit in which a pressure reducer (65) using a tube, an indoor heat exchanger (66), and an accumulator (67) are sequentially connected by piping;
8) uses the gas discharged from the compressor (61) with the outdoor heat exchanger (63) (6)
(69) is an on-off valve provided in the middle of this bypass pipe, and (70) is an outdoor heat exchanger (6).
3) and the pipe (71) are connected, (72) is the pipe that connects the outdoor heat exchanger (64) and the pipe (71), and (73) is the decompressor (6).
This is a pipe connecting 5) and the service valve (74).
Note that the outdoor heat exchangers (63) and (64) are arranged vertically.
また、本出願人は第６図及び第７図に示す冷凍装置を
試作した。尚、第５図に示す構成部材と同一のものある
いは相当するものには同一の図番を符し、説明は省略す
る。In addition, the present applicant has prototyped a refrigerating device shown in FIGS. The same or corresponding components as those shown in FIG. 5 are denoted by the same reference numerals, and description thereof is omitted.
第６図において、（75）は管（70）と管（73）とを接
続する冷媒管、（76）は管（72）と管（73）とを接続す
る冷媒管、（77）（78）は夫々冷媒管（75）（76）に設
けた減圧器で、この減圧器は同一のキャピラリーチュー
ブを用いている。In FIG. 6, (75) is a refrigerant pipe connecting the pipe (70) and the pipe (73), (76) is a refrigerant pipe connecting the pipe (72) and the pipe (73), and (77) (78) ) Are pressure reducers provided in the refrigerant pipes (75) and (76), respectively, and these pressure reducers use the same capillary tube.
第７図において、（79）は管（68）と管（76）とを接
続する一方の分岐管、（80）は管（68）と管（75）と接
続する他方の分岐管である。In FIG. 7, (79) is one branch pipe connecting the pipe (68) and the pipe (76), and (80) is the other branch pipe connecting the pipe (68) and the pipe (75).
（ハ）発明が解決しようとする課題 前述した第５図に示す冷凍装置では、その冷房運転時
に、室外熱交換器（63）（64）で凝縮した冷媒は室内熱
交換器（66）で蒸発する。このとき、下側の室外熱交換
器（64）の底から減圧器（65）が高さ（ｌ）だけ高い位
置に設けられているため、室外熱交換器（64）で凝縮し
た冷媒がこの高さの分、上方へ向けて流れなければなら
ない。このため、室外熱交換器（64）で凝縮して管（7
2）（71）を流れる冷媒の量は、室外熱交換器（63）で
凝縮して管（70）（71）を流れる冷媒の量より少ない。
また、管（70）（71）に流れる冷媒に影響を受けて管
（72）（71）に流れる冷媒は少なくなっている。このこ
とは、室外熱交換器（63）（64）での凝縮温度が49℃に
対して管（70）での冷媒温度が48℃、管（72）での冷媒
温度が36℃という実験結果により確認されている。下側
の室外熱交換器（64）からの冷媒温度が36℃となるよう
に、上側の室外熱交換器（63）からの冷媒温度に比べて
低いのは、室外熱交換器（63）に溜まっている冷媒の量
に比べて室外熱交換器（64）に溜まっている冷媒の量の
方が多いからである。室外熱交換器（64）に溜まってい
る冷媒の量が多いと、熱交換器として働く有効面積が減
少し、延いては室外熱交換器（63）（64）全体の熱交換
量が低下する欠点があった。(C) Problems to be Solved by the Invention In the refrigeration apparatus shown in FIG. 5, the refrigerant condensed in the outdoor heat exchangers (63) and (64) evaporates in the indoor heat exchanger (66) during the cooling operation. I do. At this time, since the decompressor (65) is provided at a position higher than the bottom of the lower outdoor heat exchanger (64) by the height (l), the refrigerant condensed in the outdoor heat exchanger (64) is discharged from the lower side. It must flow upward by the height. For this reason, it is condensed in the outdoor heat exchanger (64) and
2) The amount of the refrigerant flowing through (71) is smaller than the amount of the refrigerant condensed in the outdoor heat exchanger (63) and flowing through the tubes (70) and (71).
Further, the amount of the refrigerant flowing through the pipes (72) and (71) is reduced due to the influence of the refrigerant flowing through the pipes (70) and (71). This indicates that the condensation temperature in the outdoor heat exchangers (63) and (64) was 49 ° C, while the refrigerant temperature in the tube (70) was 48 ° C and the refrigerant temperature in the tube (72) was 36 ° C. Has been confirmed by It is the outdoor heat exchanger (63) that is lower than the refrigerant temperature from the upper outdoor heat exchanger (63) so that the refrigerant temperature from the lower outdoor heat exchanger (64) is 36 ° C. This is because the amount of the refrigerant stored in the outdoor heat exchanger (64) is larger than the amount of the stored refrigerant. If the amount of refrigerant accumulated in the outdoor heat exchanger (64) is large, the effective area acting as the heat exchanger decreases, and the heat exchange amount of the entire outdoor heat exchanger (63) (64) decreases. There were drawbacks.
第６図に示す冷凍装置では、管（72）（76）に流れる
冷媒は管（70）（75）に流れる冷媒に影響を受けないた
め、ほぼ同じ量である。しかし、管（72）の高さ（ｌ）
の分だけ流れにくいため、管（72）（76）に流れる冷媒
の量は少し少ない。このことは、熱交換器（63）（64）
での凝縮温度が49℃に対して管（70）での冷媒温度が43
℃、管（72）での冷媒温度が42℃という実験結果により
確認されている。In the refrigerating apparatus shown in FIG. 6, the refrigerant flowing through the pipes (72) and (76) is substantially the same amount because it is not affected by the refrigerant flowing through the pipes (70) and (75). However, the height (l) of the tube (72)
Therefore, the amount of the refrigerant flowing through the pipes (72) and (76) is slightly small. This means that the heat exchanger (63) (64)
The condensing temperature in the pipe is 49 ° C and the refrigerant temperature in the pipe (70) is 43
It has been confirmed by experimental results that the refrigerant temperature in the pipe (72) is 42 ° C.
第６図に示す冷凍装置は第５図に示す冷凍装置に比べ
て、管（72）（76）に流れる冷媒の量と管（70）（75）
に流れる冷媒の量との比が１対１に近づき、一方の室外
熱交換器に冷媒が偏って溜まっていないため非常に良
い。しかし、この冷凍装置ではバイパス管が設けられて
いないので圧縮機（61）からの吐出ガスによる除霜はで
きない欠点がある。The refrigeration system shown in FIG. 6 is different from the refrigeration system shown in FIG. 5 in that the amount of refrigerant flowing through the pipes (72) and (76) and the pipes (70) and (75)
This is very good because the ratio of the amount of refrigerant flowing to the outdoor heat exchanger approaches 1: 1 and the refrigerant is not concentrated and accumulated in one of the outdoor heat exchangers. However, in this refrigeration system, there is a drawback that defrosting by gas discharged from the compressor (61) cannot be performed because no bypass pipe is provided.
第７図に示す冷凍装置では、バイパス管（68）が設け
られているので吐出ガスによる除霜を行なうことができ
る。しかし、管（72）（76）に室外熱交換器（64）から
の冷媒が流れにくく、このため室外熱交換器（63）から
の冷媒の一部が管（80）（79）（76）に流れて、室外熱
交換器（64）内に溜まる冷媒の量が熱交換器（63）内に
溜まる冷媒の量より多く、延いては第５図に示す冷凍装
置と同様の欠点を生ずる結果となった。In the refrigerating apparatus shown in FIG. 7, since the bypass pipe (68) is provided, defrosting by the discharged gas can be performed. However, it is difficult for the refrigerant from the outdoor heat exchanger (64) to flow through the pipes (72) and (76), and a part of the refrigerant from the outdoor heat exchanger (63) is partially discharged from the pipes (80), (79) and (76). And the amount of refrigerant accumulated in the outdoor heat exchanger (64) is larger than the amount of refrigerant accumulated in the heat exchanger (63), which results in the same drawbacks as the refrigeration system shown in FIG. It became.
この発明は、圧縮機からの吐出ガスによる除霜ができ
ることは勿論、上側の室外熱交換器と下側の室外熱交換
器とに流れる冷媒の量がほぼ等しくなる冷凍装置を提供
するものである。The present invention provides a refrigerating apparatus in which the amount of refrigerant flowing through the upper outdoor heat exchanger and the amount of refrigerant flowing through the lower outdoor heat exchanger are almost equal to each other, as well as being able to perform defrosting by gas discharged from the compressor. .
（ニ）課題を解決するための手段 この発明は、圧縮機と、冷暖流路切換弁と、並列接続
された複数の室外熱交換器と、これら熱交換器と夫々直
列接続された減圧器と、室内熱交換器とを配管接続し、
前記複数の室外熱交換器を上下に配置した冷凍装置にお
いて、前記圧縮機の吐出ガスを各室外熱交換器に導くバ
イパス管を分岐させて、この一方の分岐管を下側の室外
熱交換器と減圧器との間の冷媒管に接続すると共に、他
方の分岐管を上側の室外熱交換器と減圧器との間の冷媒
管に接続し、前記一方の分岐管を他方の分岐管より冷媒
の流路抵抗を大きく設定したものである。(D) Means for Solving the Problems The present invention relates to a compressor, a cooling / heating passage switching valve, a plurality of outdoor heat exchangers connected in parallel, and a decompressor connected in series with each of these heat exchangers. , Pipe connection with the indoor heat exchanger,
In the refrigeration system in which the plurality of outdoor heat exchangers are arranged vertically, a bypass pipe that guides the discharge gas of the compressor to each outdoor heat exchanger is branched, and one of the branch pipes is connected to a lower outdoor heat exchanger. And the other branch pipe is connected to the refrigerant pipe between the upper outdoor heat exchanger and the pressure reducer, and the one branch pipe is connected to the refrigerant pipe from the other branch pipe. Are set to be large.
（ホ）作用 この冷凍装置では、圧縮機の吐出ガスを各室外熱交換
器に導くバイパス管及び分岐管を備えているので、吐出
ガスによる除霜を行なえる。(E) Function This refrigerating apparatus includes a bypass pipe and a branch pipe for guiding the gas discharged from the compressor to each outdoor heat exchanger, so that defrosting by the discharged gas can be performed.
しかも、一方の分岐管は他方の分岐管より冷媒の流路
抵抗が大きく設定されているため、冷房運転時に上側の
室外熱交換器からの冷媒は一方の分岐管に流れにくい。In addition, since the flow resistance of the refrigerant in one of the branch pipes is set to be larger than that of the other branch pipe, the refrigerant from the upper outdoor heat exchanger hardly flows into the one of the branch pipes during the cooling operation.
（ヘ）実施例 この発明の実施例を図面に基づき説明する。第１図は
この発明の第１実施例を示す冷凍装置の冷媒回路図、第
２図は同冷凍装置の室外機の斜視図である。(F) Embodiment An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a refrigerant circuit diagram of a refrigerating apparatus showing a first embodiment of the present invention, and FIG. 2 is a perspective view of an outdoor unit of the refrigerating apparatus.
これらの図において、（１）は室外機、（２）は室内
機、（３）（４）は室内機（２）と室外機（１）とを接
続する冷媒配管、（５）（６）（７）（８）はサービス
バルブである。In these figures, (1) is an outdoor unit, (2) is an indoor unit, (3) and (4) are refrigerant pipes connecting the indoor unit (2) and the outdoor unit (1), and (5) and (6). (7) and (8) are service valves.
（９）は圧縮機（10）と、四方弁を用いた冷暖流路切
換弁（11）と、並列接続された２つの室外熱交換器（1
2）（13）と、これら室外熱交換器と夫々直列接続され
た減圧機（14）（15）と、室内熱交換器（16）と、アキ
ュームレータ（17）とを配管接続して構成した冷凍回路
である。尚、室外熱交換器（12）（13）は上下に配置さ
れている。また、前記減圧器（14）（15）には同じキャ
ピラリーチューブを用いている。(9) is a compressor (10), a cooling / heating passage switching valve (11) using a four-way valve, and two outdoor heat exchangers (1) connected in parallel.
2) (13), a refrigeration system in which a decompressor (14) (15), an indoor heat exchanger (16), and an accumulator (17), which are connected in series with these outdoor heat exchangers, are connected by piping. Circuit. The outdoor heat exchangers (12) and (13) are arranged vertically. The same capillary tube is used for the decompressors (14) and (15).
（18）は除霜運転時に圧縮機（10）の吐出ガスを各室
外熱交換器（12）（13）に導くためのバイパス管、（1
9）はこのバイパス管を分岐させて室外熱交換器（13）
と減圧器（15）との間の冷媒管（20）（21）に接続され
る一方の分岐管、（22）はバイパス管（18）を分岐させ
て室外熱交換器（12）と減圧器（14）との間の冷媒管
（23）（24）に接続される他方の分岐管、（25）は一方
の分岐管（19）に設けられた逆Ｕ字状の管、（26）はバ
イパス管（18）の分岐部、（27）は他方の分岐管（22）
と冷媒管（23）（24）との接続部である。尚、前記管
（25）の高さと、接続部（27）と分岐部（26）との高さ
の和（α）が減圧器（15）の設けられている高さ（β）
よりずっと大きく設定されているため、一方の分岐管
（19）における冷媒の流路抵抗は他方の分岐管（22）よ
り大きい。（28）は冷媒回路の要部、（29）はサービス
バルブ（７）と夫々の減圧器（14）（15）とを接続する
冷媒管、（40）は除霜運転時にのみ開かれる開閉弁であ
る。（41）（42）は冷媒管、（43）は伝熱管、（44）は
熱交換フィンである。(18) is a bypass pipe for guiding the gas discharged from the compressor (10) to the outdoor heat exchangers (12) and (13) during the defrosting operation.
9) Branches this bypass pipe to make an outdoor heat exchanger (13)
One branch pipe connected to the refrigerant pipes (20) and (21) between the air conditioner and the pressure reducer (15), and (22) branches off the bypass pipe (18) to form the outdoor heat exchanger (12) and the pressure reducer. The other branch pipe connected to the refrigerant pipes (23) and (24) between (14) and (14), (25) is an inverted U-shaped pipe provided in one branch pipe (19), and (26) is Branch of bypass pipe (18), (27) is the other branch pipe (22)
And the refrigerant pipes (23) and (24). The sum (α) of the height of the pipe (25) and the height of the connecting portion (27) and the branch portion (26) is the height (β) at which the pressure reducer (15) is provided.
Since it is set much larger, the flow path resistance of the refrigerant in one branch pipe (19) is larger than the other branch pipe (22). (28) is a main part of the refrigerant circuit, (29) is a refrigerant pipe connecting the service valve (7) and the respective pressure reducers (14) and (15), and (40) is an opening / closing valve opened only during the defrosting operation. It is. (41) and (42) are refrigerant tubes, (43) is a heat transfer tube, and (44) is a heat exchange fin.
（30）は室外機（１）の外装パネル、（31）は底板、
（32）はサービスバルブ（５）（７）の取付台、（33）
は送風機（34）の取付台である。(30) is the exterior panel of the outdoor unit (1), (31) is the bottom plate,
(32) is a mounting base for service valves (5) and (7), (33)
Denotes a mount for the blower (34).
このように構成された冷凍装置では、その冷房運転時
には、冷暖流路切換弁（17）が切換えられ、冷媒は室外
熱交換器（12）（13）で凝縮し、室内熱交換器（16）で
蒸発する。In the refrigeration system configured as described above, during the cooling operation, the cooling / heating passage switching valve (17) is switched, and the refrigerant is condensed in the outdoor heat exchangers (12) and (13), and the indoor heat exchanger (16) To evaporate.
この冷房運転時には、室外熱交換器（13）からの冷媒
は冷媒管（20）を上向きに流れる分、室外熱交換器（1
2）から冷媒管（23）（24）に流れる冷媒より少し流れ
にくい。During the cooling operation, the refrigerant from the outdoor heat exchanger (13) flows upward through the refrigerant pipe (20), so that the outdoor heat exchanger (1
It is slightly harder to flow than the refrigerant flowing from 2) to the refrigerant pipes (23) and (24).
このとき、一方の分岐管（19）に逆Ｕ字状の管（25）
が設けられ、更に分岐部（26）が接続部（27）より高位
置に設けられているため、室外熱交換器（12）からの冷
媒が他方の分岐管（22）と一方の分岐管（19）に流れに
くく、分岐管（22）（19）に流れる冷媒は冷媒管（20）
を流れる冷媒にほとんど影響を与えない。At this time, an inverted U-shaped pipe (25) is connected to one branch pipe (19).
Is provided, and since the branch portion (26) is provided at a higher position than the connection portion (27), the refrigerant from the outdoor heat exchanger (12) is supplied with the other branch pipe (22) and the one branch pipe ( The refrigerant that hardly flows to 19) and flows to the branch pipes (22) and (19) is the refrigerant pipe (20).
Has almost no effect on the refrigerant flowing through it.
このため、冷媒管（20）（21）に流れる冷媒は冷媒管
（23）（24）に流れる冷媒に比べて、上向きに流れる分
だけ流れにくいものである。これは室外熱交換器（12）
（13）からの冷媒の出口温度が夫々43℃、42℃となった
実験結果により確認されている。For this reason, the refrigerant flowing through the refrigerant pipes (20) and (21) is less likely to flow by the amount that flows upward than the refrigerant flowing through the refrigerant pipes (23) and (24). This is an outdoor heat exchanger (12)
It has been confirmed from experimental results that the outlet temperature of the refrigerant from (13) was 43 ° C. and 42 ° C., respectively.
しかし、この冷媒の出口温度の差は、従来例を示した
第６図と同じ温度差であるため、極めて小さく、室外熱
交換器（12）（13）夫々を流れる冷媒の量はほぼ同じ量
である。室外熱交換器（12）（13）夫々にはほぼ同量の
冷媒が流れるため、一方の室外熱交換器に冷媒が偏って
溜まることを抑えられる。延いては室外熱交換器（12）
（13）の熱交換量の低下を抑えることができる。However, since the difference between the outlet temperatures of the refrigerant is the same as that shown in FIG. 6 showing the conventional example, it is extremely small, and the amount of the refrigerant flowing through each of the outdoor heat exchangers (12) and (13) is substantially the same. It is. Since approximately the same amount of refrigerant flows through each of the outdoor heat exchangers (12) and (13), it is possible to prevent the refrigerant from being concentrated in one of the outdoor heat exchangers. The outdoor heat exchanger (12)
(13) The decrease in the amount of heat exchange can be suppressed.
次に、第３図に示す第２実施例の冷凍装置について説
明する。尚、第１図に示したものと同一あるいは相当す
るものには同一の図番を符し、その説明は省略する。Next, the refrigerating apparatus of the second embodiment shown in FIG. 3 will be described. The same or corresponding parts as those shown in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.
（35）（36）は上側の室外熱交換器（12）の上部と下
部との夫々に設けられた分岐管、（37）（38）は下側の
室外熱交換器（13）の上部と下部との夫々に設けられた
分岐管である。(35) and (36) are branch pipes provided at the upper and lower portions of the upper outdoor heat exchanger (12), respectively, and (37) and (38) are at upper portions of the lower outdoor heat exchanger (13). It is a branch pipe provided in each of the lower part.
このように、その室外熱交換器（12）（13）内で分流
させる理由はこれらの室外熱交換器（12）（13）内での
冷媒の圧力損失を小さくするためであり、冷媒循環量の
多い冷凍装置や室内熱交換器を複数備えたマルチタイプ
の冷凍装置に特に有効である。The reason why the flow is divided in the outdoor heat exchangers (12) and (13) is to reduce the pressure loss of the refrigerant in the outdoor heat exchangers (12) and (13). The present invention is particularly effective for a refrigeration system having a large number or a multi-type refrigeration system having a plurality of indoor heat exchangers.
このように構成された冷凍装置では、第１実施例に示
した冷凍装置と同様に室外熱交換器（12）からの冷媒が
分岐管（22）（19）に流れにくく流れても少ないため、
室外熱交換器（13）からの冷媒が管（19）（21）を流れ
る冷媒によってほとんど影響を受けない。In the refrigeration system thus configured, the refrigerant from the outdoor heat exchanger (12) hardly flows to the branch pipes (22) and (19) as in the refrigeration system shown in the first embodiment, so that the refrigerant hardly flows.
The refrigerant from the outdoor heat exchanger (13) is hardly affected by the refrigerant flowing through the pipes (19) and (21).
このため、第１実施例の冷凍装置と同様に上側の室外
熱交換器（12）と下側の室外熱交換器（13）とにほぼ同
量の冷媒が流れる。Therefore, substantially the same amount of refrigerant flows through the upper outdoor heat exchanger (12) and the lower outdoor heat exchanger (13) as in the refrigeration apparatus of the first embodiment.
次に、第４図に示す第３実施例について説明する。第
４図は第３実施例の要部冷媒回路図で、回路の他の部分
は第１実施例の冷凍装置あるいは第２実施例の冷凍装置
と同じである。図において（39）は一方の分岐管（19）
に設けられた開閉弁で、この開閉弁は冷房運転及び暖房
運転時に閉じられ、且つ、除霜運転時に開かれるもので
ある。開閉弁（39）が冷房運転時に閉じられるため、一
方の分岐管（19）の流路抵抗は他方の分岐管（22）より
大きくなっている。Next, a third embodiment shown in FIG. 4 will be described. FIG. 4 is a main part refrigerant circuit diagram of the third embodiment, and other parts of the circuit are the same as those of the refrigeration system of the first embodiment or the refrigeration system of the second embodiment. In the figure, (39) is one branch pipe (19)
The on-off valve is closed during the cooling operation and the heating operation, and is opened during the defrosting operation. Since the on-off valve (39) is closed during the cooling operation, the flow resistance of one branch pipe (19) is larger than that of the other branch pipe (22).
このように構成された冷凍装置では、その冷房運転時
には開閉弁（39）が閉じられるため、室外熱交換器（1
2）からの冷媒が一方の分岐管（19）を通らない。この
ため、下側の室外熱交換器（13）からの冷媒は上側の室
外熱交換器（12）からの冷媒によって全く影響を受けな
い。In the refrigeration apparatus thus configured, the on-off valve (39) is closed during the cooling operation, so that the outdoor heat exchanger (1) is closed.
The refrigerant from 2) does not pass through one branch pipe (19). Therefore, the refrigerant from the lower outdoor heat exchanger (13) is not affected at all by the refrigerant from the upper outdoor heat exchanger (12).
このため、第１実施例の冷凍装置や第２実施例の冷凍
装置と同様に上側の室外熱交換器（12）と下側の室外熱
交換器（13）とにほぼ同量の冷媒が流れる。For this reason, almost the same amount of refrigerant flows through the upper outdoor heat exchanger (12) and the lower outdoor heat exchanger (13) as in the refrigeration system of the first embodiment and the refrigeration system of the second embodiment. .
これら第１実施例、第２実施例、第３実施例の冷凍装
置は何れも、冷暖流路切換弁（11）が設けられているの
で、この切換弁が切換えられることによって暖房運転も
行なえる。また、バイパス管（18）が設けられて除霜運
転時には、圧縮機（10）の吐出ガスを各室外熱交換器
（12）（13）に導くことができるので、勿論この吐出ガ
スにより除霜することもできる。In each of the refrigerating apparatuses of the first, second, and third embodiments, since a cooling / heating passage switching valve (11) is provided, a heating operation can be performed by switching the switching valve. . Further, when the bypass pipe (18) is provided and the defrosting operation is performed, the discharge gas of the compressor (10) can be guided to each of the outdoor heat exchangers (12) and (13). You can also.
尚、冷房運転時、室外熱交換器（12）からの冷媒を一
方の分岐管（19）に流れにくくするために一方の分岐管
（19）を他方の分岐管（22）より流路抵抗を大きくする
手段として、逆Ｕ字状の管（25）、開閉弁（39）を用い
た例で説明したが、一方の分岐管（19）に細い管、オリ
フィス、キャピラリーチューブ等の流路抵抗となるもの
を用いても構わない。ただし、細い管、オリフィス、キ
ャピラリーチューブを用いた場合は除霜運転時に吐出ガ
スを各室外熱交換器に等しく導くことができない恐れが
あるため、各室外熱交換器に等しく吐出ガスを導くこと
のできる前記逆Ｕ字状の管（25）や開閉弁（39）を使用
するのが望ましい。During the cooling operation, one of the branch pipes (19) has a lower flow resistance than the other branch pipe (22) in order to make it difficult for the refrigerant from the outdoor heat exchanger (12) to flow to the one of the branch pipes (19). As an example of using the inverted U-shaped pipe (25) and the on-off valve (39) as a means for increasing the size, one of the branch pipes (19) has a flow resistance such as a thin pipe, an orifice, or a capillary tube. May be used. However, if a thin tube, orifice, or capillary tube is used, the discharge gas may not be guided equally to each outdoor heat exchanger during the defrosting operation. It is preferable to use the inverted U-shaped pipe (25) and the on-off valve (39) that can be used.
また、他方の分岐管（22）に一方の分岐管（19）より
太い管を用いることにより、他方の分岐管（22）を一方
の分岐管（19）より冷媒の流通抵抗を小さく設定しても
構わない。Also, by using a pipe thicker than the one branch pipe (19) for the other branch pipe (22), the other branch pipe (22) is set to have a smaller flow resistance of the refrigerant than the one branch pipe (19). No problem.
（ト）発明の効果 以上説明したように、この発明によれば、圧縮機の吐
出ガスを各室外熱交換器に導くバイパス管を備えて吐出
ガスによる除霜を行なうことのできる冷凍装置におい
て、バイパス管の一方の分岐管を下側の室外熱交換器と
減圧器との間の冷媒管に接続すると共に、他方の分岐管
を上側の室外熱交換器と減圧器との間の冷媒管に接続
し、前記一方の分岐管を他方の分岐管より冷媒の流路抵
抗を大きく設定したので、冷暖房運転時に上側の室外熱
交換器からの冷媒は一方の分岐管に流れにくく、上側の
室外熱交換器と下側の室外熱交換器とにほぼ等しく冷媒
が流れて一方の熱交換器に冷媒が偏って溜まることを防
止でき、延いては室外熱交換器の熱交換量の低下を抑え
ることができる。(G) Effect of the Invention As described above, according to the present invention, in a refrigeration apparatus that includes a bypass pipe that guides a discharge gas of a compressor to each outdoor heat exchanger and that can perform defrosting by the discharge gas, One branch pipe of the bypass pipe is connected to the refrigerant pipe between the lower outdoor heat exchanger and the pressure reducer, and the other branch pipe is connected to the refrigerant pipe between the upper outdoor heat exchanger and the pressure reducer. Since the refrigerant flow resistance of the one branch pipe is set to be larger than that of the other branch pipe, the refrigerant from the upper outdoor heat exchanger hardly flows to the one branch pipe during the cooling / heating operation, and the upper outdoor heat exchanger It is possible to prevent the refrigerant from flowing almost equally to the heat exchanger and the lower outdoor heat exchanger, and to prevent the refrigerant from being unevenly accumulated in one of the heat exchangers, thereby suppressing a decrease in the heat exchange amount of the outdoor heat exchanger. Can be.
第１図ないし第４図にはこの発明の実施例を示し、第１
図は第１実施例の冷凍装置の冷媒回路図、第２図は同冷
凍装置の室外機の斜視図、第３図は第２実施例の冷凍装
置の冷媒回路図、第４図は第３実施例の冷凍装置の要部
冷媒回路図、第５図は第１従来例を示す冷凍装置の冷媒
回路図、第６図は第２従来例を示す冷凍装置の冷媒回路
図、第７図は第３従来例を示す冷凍装置の冷媒回路図で
ある。 （10）…圧縮機、（11）…冷暖流路切換弁、（12）（1
3）…室外熱交換器、（14）（15）…減圧器、（18）…
バイパス管、（19）…一方の分岐管、（20）（21）…冷
媒管、（22）…他方の分岐管、（23）（24）…冷媒管。1 to 4 show an embodiment of the present invention.
FIG. 2 is a refrigerant circuit diagram of the refrigeration apparatus of the first embodiment, FIG. 2 is a perspective view of an outdoor unit of the refrigeration apparatus, FIG. 3 is a refrigerant circuit diagram of the refrigeration apparatus of the second embodiment, and FIG. FIG. 5 is a refrigerant circuit diagram of a refrigeration apparatus showing a first conventional example, FIG. 6 is a refrigerant circuit diagram of a refrigeration apparatus showing a second conventional example, and FIG. It is a refrigerant circuit diagram of the refrigerating apparatus showing the 3rd conventional example. (10) Compressor, (11) Cooling / heating passage switching valve, (12) (1
3) Outdoor heat exchanger (14) (15) Pressure reducer (18)
Bypass pipe, (19) ... one branch pipe, (20) (21) ... refrigerant pipe, (22) ... other branch pipe, (23) (24) ... refrigerant pipe.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 家村 暁 大阪府守口市京阪本通２丁目18番地 三 洋電機株式会社内 (72)発明者 斉藤 貞治 大阪府守口市京阪本通２丁目18番地 三 洋電機株式会社内 (72)発明者 広瀬 利雄 大阪府守口市京阪本通２丁目18番地 三 洋電機株式会社内 (56)参考文献 実開 昭62−102559（ＪＰ，Ｕ) 実開 平１−82469（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) F25B 47/02 540 F25B 13/00──────────────────────────────────────────────────続 き Continued on the front page (72) Akira Iemura 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Sadaharu Saito 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Inside Yo-Electric Co., Ltd. (72) Inventor Toshio Hirose 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References Japanese Utility Model 1987-102559 (JP, U) Japanese Utility Model 82469 (JP, U) (58) Field surveyed (Int. Cl. 6 , DB name) F25B 47/02 540 F25B 13/00
Claims (1)
れた複数の室外熱交換器と、これら熱交換器と夫々直列
接続された減圧器と、室内熱交換器とを配管接続し、前
記複数の室外熱交換器を上下に配置した冷凍装置におい
て、前記圧縮機の吐出ガスを各室外熱交換器に導くバイ
パス管を分岐させて、この一方の分岐管を下側の室外熱
交換器と減圧器との間の冷媒管に接続すると共に、他方
の分岐管を上側の室外熱交換器と減圧器との間の冷媒管
に接続し、前記一方の分岐管を他方の分岐管より冷媒の
流路抵抗を大きく設定したことを特徴とする冷凍装置。1. A pipe connection of a compressor, a cooling / heating passage switching valve, a plurality of outdoor heat exchangers connected in parallel, a decompressor connected in series with each of these heat exchangers, and an indoor heat exchanger. In the refrigerating apparatus in which the plurality of outdoor heat exchangers are vertically arranged, a bypass pipe that guides the discharge gas of the compressor to each outdoor heat exchanger is branched, and one of the branch pipes is connected to a lower outdoor heat exchanger. Connect the refrigerant pipe between the exchanger and the pressure reducer, connect the other branch pipe to the refrigerant pipe between the upper outdoor heat exchanger and the pressure reducer, and connect the one branch pipe to the other branch pipe. A refrigeration apparatus characterized in that the flow resistance of the refrigerant is set higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31347890A JP2777477B2 (en) | 1990-11-19 | 1990-11-19 | Refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31347890A JP2777477B2 (en) | 1990-11-19 | 1990-11-19 | Refrigeration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04186065A JPH04186065A (en) | 1992-07-02 |
| JP2777477B2 true JP2777477B2 (en) | 1998-07-16 |
Family
ID=18041792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31347890A Expired - Fee Related JP2777477B2 (en) | 1990-11-19 | 1990-11-19 | Refrigeration equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2777477B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542248A (en) * | 2019-09-23 | 2019-12-06 | 珠海格力电器股份有限公司 | Condenser capable of improving supercooling degree, water chilling unit, air conditioner and unit control method |
-
1990
- 1990-11-19 JP JP31347890A patent/JP2777477B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04186065A (en) | 1992-07-02 |
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