JPH11132582A - Air refrigerant type refrigerator - Google Patents
Air refrigerant type refrigeratorInfo
- Publication number
- JPH11132582A JPH11132582A JP30955597A JP30955597A JPH11132582A JP H11132582 A JPH11132582 A JP H11132582A JP 30955597 A JP30955597 A JP 30955597A JP 30955597 A JP30955597 A JP 30955597A JP H11132582 A JPH11132582 A JP H11132582A
- Authority
- JP
- Japan
- Prior art keywords
- air
- heat exchanger
- expander
- compressor
- path
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は，要冷却室の空気を
空気冷媒式冷凍機の冷媒として取入れ，該冷凍機で冷却
された冷媒空気を要冷却室に直接的に吹き出すことによ
り該室を冷却する場合に，冷媒空気中に混入する湿分と
浮遊物質が冷凍装置の運転効率を低下させるのを防止す
ると同時に，空気の浄化も同時に行えるようにした空気
冷媒式冷凍装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling system for an air-cooled refrigerator in which air in a cooling room is taken in as a refrigerant, and the refrigerant air cooled by the refrigerator is blown directly into the cooling room. The present invention relates to an air-refrigerant refrigeration system that prevents moisture and suspended substances mixed in refrigerant air from lowering the operation efficiency of the refrigeration system and simultaneously purifies air when cooling.
【０００２】[0002]
【従来の技術】圧縮機で高圧高温の空気とし，これを冷
却器で冷却したあと，膨張機で低圧低温とするいわゆる
空気冷媒式冷凍機は，フロン系やアンモニア等の冷媒を
使用しないので，環境に悪影響を与えることがない。し
かし，フロン等の冷媒を用いて凝縮と蒸発を行わせる相
変化方式の冷凍サイクルに比べると効率は低く，また効
率を上げるには装置が大掛かりとなる。このため，その
効率アップを目標として種々の技術開発が進められてい
る。2. Description of the Related Art A so-called air-refrigerant refrigerator in which high-pressure and high-temperature air is compressed by a compressor, cooled by a cooler, and then reduced by an expander to low pressure and low temperature does not use a refrigerant such as chlorofluorocarbon or ammonia. Does not adversely affect the environment. However, the efficiency is lower than that of a phase change type refrigeration cycle in which condensation and evaporation are performed using a refrigerant such as chlorofluorocarbon, and a large-scale apparatus is required to increase the efficiency. For this reason, various technological developments are being promoted with the aim of increasing the efficiency.
【０００３】本発明者らも，例えば特許掲載公報第２５
４６７６５号や特開平９−２１０４８４号公報等におい
て，実用に供し得る空気冷媒式冷凍機（製氷装置）を種
々提案している。The present inventors have also disclosed, for example, Patent Publication No. 25
46765 and JP-A-9-210484 have proposed various air-cooled refrigerators (ice making devices) that can be put to practical use.
【０００４】[0004]
【発明が解決しようとする課題】空気冷媒式冷凍機で作
られた低温空気を熱交換器内に通気し，再び該冷凍機に
戻すいわゆる閉サイクルを形成する場合には，特別のこ
とがない限り，冷媒として循環する空気経路には外気や
汚染空気が自然に混入することはない。しかし，このよ
うな空気冷媒式冷凍機で閉サイクルを形成する場合に
は，熱交換器を用いた間接的な熱の授受となるので，効
率が一層落ちることになり，また，その用途も限られる
ことになる。There is nothing special in forming a so-called closed cycle in which low-temperature air produced by an air-refrigerant refrigerator is passed through a heat exchanger and returned to the refrigerator again. As long as outside air or contaminated air does not naturally enter the air path circulating as a refrigerant. However, in the case of forming a closed cycle with such an air-cooled refrigerator, efficiency is further reduced because heat is exchanged indirectly using a heat exchanger, and its use is also limited. Will be done.
【０００５】これに対し，空気冷媒式冷凍機の冷媒空気
を各種用途の空間内に直接的に吹き出してその空間を冷
却する直接冷却方式は，室内空気を直接的に冷却するの
で前記の間接方式にはない利点があり，また，このよう
な空気の直接冷却方式はフロン等の他の冷媒を用いたの
ではなし得ないところでもある。例えば，食品等の冷凍
保存を行う冷凍庫，冷凍車，冷凍コンテナ，食品陳列
棚，そのほか冷却を要する各種用途空間（要冷却室と呼
ぶ）の冷却に，該冷媒空気を直接吹き出す方式を採用す
れば，空気冷媒式冷凍機の特徴を遺憾なく発揮できるこ
とになる。On the other hand, the direct cooling system in which the refrigerant air of the air-refrigerant refrigerator is directly blown into a space for various uses to cool the space is directly cooled by room air. There is an advantage that is not provided in the above, and such a direct cooling system of air cannot be achieved by using other refrigerants such as Freon. For example, if a system that directly blows out the refrigerant air is used to cool a freezer for freezing and preserving foods, a freezer truck, a freezing container, food display shelves, and other various application spaces requiring cooling (called cooling rooms). Therefore, the features of the air-cooled refrigerator can be fully exhibited.
【０００６】ところが，このような，言わばオープンサ
イクルで空気冷媒式冷凍機を稼働する場合には，一般空
気が膨張機で断熱膨張されるので，空気中の湿分は微細
な氷片に相変化し，これが低温空気管路の管内で堆積成
長して圧損を高め，場合によって管路閉塞を起こして凍
結トラブルに至るという問題がある。However, when the air-refrigerant refrigerator is operated in an open cycle, the general air is adiabatically expanded by the expander, so that the moisture in the air changes into fine ice chips. However, there is a problem in that this deposits and grows in the pipe of the low-temperature air pipe to increase the pressure loss, and in some cases, the pipe becomes blocked, leading to a freezing trouble.
【０００７】また，このようなオープンサイクルでは，
要冷却室の空気の湿分のみならず，空気中に浮遊する粉
塵，微生物，汚染物質等もそのまま冷媒空気中に同伴す
るので，このような浮遊物質が前記の断熱膨張時の氷片
発生核として作用し，一層雪状物の生成を促進すること
にもなる。In such an open cycle,
Not only the moisture in the air in the cooling chamber, but also dust, microorganisms, and contaminants floating in the air are directly entrained in the refrigerant air. And further promotes the formation of snow.
【０００８】したがって，本発明の課題は，外気や周囲
空気が混入するような要冷却室の空気を冷媒として空気
冷媒式冷凍機に取入れる場合の前記の問題を解決するこ
とにある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problem in the case where air in a cooling required chamber into which outside air or ambient air is mixed is introduced as a refrigerant into an air-refrigerant refrigerator.
【０００９】[0009]
【課題を解決するための手段】本発明によれば，空気の
経路に，圧縮機，空気冷却器，空気対空気熱交換器およ
び膨張機を空気の流れの順に配置し，要冷却室内の空気
を前記の空気対空気熱交換器を経て該圧縮機に取入れ，
該膨張機を出た空気を該要冷却室内に吹き出すようにし
た空気冷媒式冷凍装置において，該膨張機を出た空気の
一部または全部を要冷却室を迂回して該空気対空気熱交
換器に戻すための弁介装の第１のバイパス路と，圧縮機
を出て膨張機に入る前の空気路から０℃以上の空気を取
入れ，これを空気対空気熱交換器の入口側空気路に供給
するための弁介装の温風バイバス路を設けたことを特徴
とする空気冷媒式冷凍装置を提供する。According to the present invention, a compressor, an air cooler, an air-to-air heat exchanger, and an expander are arranged in the air path in the order of the flow of air, and the air in the cooling required room is arranged. Into the compressor via the air-to-air heat exchanger,
In an air-refrigerant refrigeration system in which air exiting from the expander is blown into the cooling-required chamber, part or all of the air exiting the expander bypasses the cooling-required chamber to exchange air-to-air heat. Air at 0 ° C. or higher is taken in from a first bypass passage of a valve interposition for returning to the heat exchanger and an air passage before exiting the compressor and entering the expander, and the air is introduced into the air to the inlet side air of the air heat exchanger. Provided is an air-refrigerant refrigeration apparatus characterized in that a hot-air bypass path provided with a valve interposed for supplying to a path is provided.
【００１０】また，本発明によれば，空気の経路に，圧
縮機，空気冷却器，空気対空気熱交換器および膨張機を
空気の流れの順に配置し，要冷却室内の空気を前記の空
気対空気熱交換器を経て該圧縮機に取入れ，該膨張機を
出た空気を該要冷却室内に吹き出すようにした空気冷媒
式冷凍装置において，該膨張機を出た空気の一部または
全部を要冷却室を迂回して該空気対空気熱交換器に戻す
ための弁介装の第１のバイパス路と，圧縮機を出て膨張
機に入る前の空気路のうち空気冷却器または空気対空気
熱交換器に入る前の空気路から高温圧縮空気を取入れ，
これを膨張機の入口側空気路に供給するための弁介装の
温風バイバス路を設けたことを特徴とする空気冷媒式冷
凍装置を提供する。Further, according to the present invention, a compressor, an air cooler, an air-to-air heat exchanger, and an expander are arranged in the air path in the order of the flow of air, and the air in the cooling required room is supplied to the air. In an air-refrigerant refrigeration system which takes in the compressor through an air heat exchanger and blows out the air exiting the expander into the required cooling chamber, part or all of the air exiting the expander is removed. A first bypass passage of a valve interposition for bypassing the cooling chamber and returning to the air-to-air heat exchanger; and an air cooler or an air passage of an air passage before exiting the compressor and entering the expander. Take hot compressed air from the air passage before entering the air heat exchanger,
There is provided an air-refrigerant refrigeration apparatus characterized in that a hot-air bypass path provided with a valve is provided to supply this to an inlet-side air path of an expander.
【００１１】[0011]
【発明の実施の形態】図１は，本発明の空気冷媒式冷凍
装置の機器配置例を示したもので，左側の破線で囲った
部分は冷凍機内の機器構成例を，右側の破線域は負荷側
の要冷却室Ｂを表している。要冷却室Ｂは例えば冷凍庫
であり，作業員や食品の出入のためのドアを有すること
から，周囲雰囲気との間で空気の出入が不可避的に生ず
る。冷凍機の機器群は１つのケーシング内に収めた装置
とすることができ，これを空気冷媒式冷凍機Ａとする
と，この冷凍機Ａと要冷却室Ｂとを空気路で連結するこ
とにより，本発明の空気冷媒式冷凍装置が構成される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of equipment arrangement of an air-refrigerant refrigeration system according to the present invention. This shows the cooling chamber B on the load side. The cooling room B is, for example, a freezer and has doors for workers and foods, so that air inevitably flows in and out of the surrounding atmosphere. The equipment group of the refrigerator can be a device housed in one casing, and if this is an air-refrigerant refrigerator A, by connecting the refrigerator A and the cooling required room B by an air path, The air refrigerant refrigeration apparatus of the present invention is configured.
【００１２】すなわち，空気冷媒式冷凍機Ａの空気取入
口１と要冷却室Ｂの空気排出口２を空気路３で連結し，
冷凍機Ａの低温空気吐出口４ａまたは４ｂと要冷却室Ｂ
の空気吹出口５を空気路６で連結することにより，要冷
却室Ｂの空気を冷凍機Ａの冷媒として取入れ，この冷凍
機Ａから吐出する低温空気を要冷却室Ｂに吹き出す空気
冷媒式冷凍装置が構成される。That is, the air inlet 1 of the air-refrigerant refrigerator A and the air outlet 2 of the cooling required room B are connected by the air passage 3,
Low temperature air discharge port 4a or 4b of refrigerator A and cooling room B required
The air outlet 5 is connected to an air passage 6 to take in the air in the cooling chamber B as a refrigerant for the refrigerator A, and to blow out the low-temperature air discharged from the refrigerator A to the cooling chamber B. The device is configured.
【００１３】空気冷媒式冷凍機Ａは，空気圧縮機７，空
気冷却器８，空気対空気熱交換器９および空気膨張機１
０を空気の流れの順に配置し，空気対空気熱交換器９に
おいて要冷却室Ｂから取入れた空気を圧縮機出側の空気
と熱交換するようにしたものであるが，図示のもので
は，空気圧縮機は主圧縮機７と補助圧縮機１１の２台で
構成され，補助圧縮機１１で圧縮した空気を補助冷却器
１２で冷却したものを主圧縮機７に取入れるようにして
ある。圧縮機はターボ式，膨張機はタービン式のものが
使用され，両者は互いに動力が伝達されるように連結さ
れており，膨張機の回転動力が圧縮機の回転軸に伝達さ
れることにより，動力回収がなされる。The air-refrigerant refrigerator A includes an air compressor 7, an air cooler 8, an air-to-air heat exchanger 9, and an air expander 1.
0 are arranged in the order of the flow of air, and the air taken in from the cooling chamber B in the air-to-air heat exchanger 9 exchanges heat with the air on the outlet side of the compressor. The air compressor is composed of two units, a main compressor 7 and an auxiliary compressor 11, and the air compressed by the auxiliary compressor 11 is cooled by an auxiliary cooler 12, and is taken into the main compressor 7. The compressor is a turbo type and the expander is a turbine type. Both are connected so that power is transmitted to each other, and the rotational power of the expander is transmitted to the rotary shaft of the compressor. Power recovery is performed.
【００１４】空気冷却器８と補助冷却器１２は水対空気
熱交換器（フインチューブプレート型熱交換器）が使用
されており，プレート内には冷却水が通水される。空気
対空気熱交換器９は多数枚の樹脂製波板を積層すること
によって多数の細管通路からなる独立した二系統の空気
通路を構成し，一方の系統の空気と他方の系統の空気を
該樹脂製波板を熱交換面として間接的に熱交換するよう
にしたものが使用されている。As the air cooler 8 and the auxiliary cooler 12, a water-to-air heat exchanger (fin tube plate type heat exchanger) is used, and cooling water is passed through the plates. The air-to-air heat exchanger 9 forms an independent two-system air passage composed of a large number of narrow tube passages by laminating a large number of resin corrugated sheets. The air of one system and the air of the other system are separated. A resin corrugated plate is used as a heat exchange surface for indirect heat exchange.
【００１５】この空気冷媒式冷凍装置における空気の状
態変化の一例を挙げると，要冷却室Ｂから−５℃の常圧
空気が冷凍機Ａ内に取り入れられたとすると，補助圧縮
機１１で約５０℃で約１.４気圧，補助冷却器１２で４
０℃で１.４気圧の空気となり，これが主圧縮機７でさ
らに圧縮されることにより約１００℃で約２気圧の高温
圧縮空気となる。この高温圧縮空気は空気冷却器８で約
４０℃まで冷却され，空気対空気熱交換器９で約０℃ま
で冷却される（圧力は約２気圧）。この２気圧の０℃の
空気は膨張機１０によって，常圧付近まで膨張し，この
膨張にともなって−２０℃付近にまで冷却される。な
お，要冷却室Ｂの−５℃（常圧）の空気は空気対空気熱
交換器９を通過する時点で常圧のまま約３５℃に昇温す
る。As an example of a change in the state of air in the air-refrigerant type refrigeration apparatus, assuming that normal pressure air of -5 ° C. is taken into the refrigerator A from the cooling required chamber B, about 50 centimeters of air will About 1.4 atm at ℃, 4 with auxiliary cooler 12
At 0 ° C., the air becomes 1.4 atm, which is further compressed by the main compressor 7 to become high-temperature compressed air at about 100 ° C. and about 2 atm. The hot compressed air is cooled to about 40 ° C. in the air cooler 8 and to about 0 ° C. in the air-to-air heat exchanger 9 (the pressure is about 2 atm). The air at 2 ° C. and at 0 ° C. is expanded by the expander 10 to near normal pressure, and is cooled to around −20 ° C. with this expansion. The air at −5 ° C. (normal pressure) in the cooling required room B rises to about 35 ° C. at the normal pressure when passing through the air-to-air heat exchanger 9.
【００１６】このようにして，要冷却室Ｂの空気（−５
℃，常圧）は，空気冷媒式冷凍装置Ａを通過することに
よって低温空気（−２０℃，常圧）となり，これが要冷
却室Ｂの空気吹出口５から吹き出されることにより，要
冷却室Ｂを冷凍庫として必要な低温に維持する。In this manner, the air in the cooling required room B (−5)
(° C., normal pressure) passes through the air-refrigerant refrigeration system A to become low-temperature air (−20 ° C., normal pressure). Maintain B at the required low temperature as a freezer.
【００１７】本発明においては，このように構成された
空気冷媒式冷凍装置において，膨張機１０を出た空気の
一部または全部を，要冷却室Ｂを迂回して該空気対空気
熱交換器９に戻すための弁介装の第１のバイパス路１３
と，圧縮機１１または７を出たあと膨張機１０に入る前
の空気路から０℃以上の空気を取入れ，これを空気対空
気熱交換器９の入口側空気路に供給するための弁介装の
温風バイバス路１４を設ける。In the present invention, in the air-refrigerant refrigeration system configured as described above, a part or all of the air that has exited the expander 10 is bypassed to the cooling-requiring chamber B and the air-to-air heat exchanger. First bypass 13 with valve intervention to return to 9
And a valve via which air of 0 ° C. or higher is taken in from an air passage after leaving the compressor 11 or 7 and before entering the expander 10 and supplied to the air passage on the inlet side of the air-to-air heat exchanger 9. A warm air bypass path 14 is provided.
【００１８】図１の例では，第１のバイパス路１３は空
気路６のａ点と空気路３のｂ点を連結するように設けら
れ，このバイパス路１３には弁１５が介装してある。こ
のバイパス弁１５は空気路を開閉するダンパ構造のもの
であり，その開度調整ができる。また，空気路６のａ点
と空気吹出口５との間にはダンパ１６が，そして空気路
３のｂ点と空気取入口２との間にはダンパ１７が介装し
てある。したがって冷凍機Ａを運転した状態で，ダンパ
１６と１７を閉じ，バイパス弁１５を開くと膨張機１０
からの低温空気が要冷却室Ｂを迂回して空気対空気熱交
換器９に直接流れることになる。なお，図１の弁１５と
ダンパ１６，１７に代えて，バイパス路１３と空気路
６，空気路３との連結点に三方弁を取付けることによ
り，バイパス路１３への空気の切換えを行うようにする
こともできる。In the example of FIG. 1, the first bypass passage 13 is provided so as to connect the point a of the air passage 6 and the point b of the air passage 3, and a valve 15 is interposed in the bypass passage 13. is there. The bypass valve 15 has a damper structure for opening and closing the air passage, and its opening degree can be adjusted. A damper 16 is interposed between the point a of the air passage 6 and the air outlet 5, and a damper 17 is interposed between the point b of the air passage 3 and the air intake 2. Therefore, when the refrigerator A is operated, the dampers 16 and 17 are closed, and the bypass valve 15 is opened.
Low-temperature air flows directly to the air-to-air heat exchanger 9 bypassing the cooling required room B. In addition, instead of the valve 15 and the dampers 16 and 17 in FIG. 1, a three-way valve is attached to a connection point between the bypass passage 13 and the air passage 6 and the air passage 3, so that air is switched to the bypass passage 13. You can also
【００１９】温風バイパス路１４は，図１の例では，空
気路３のｂ点と空気対空気熱交換器９の間のＹ点と，空
気対空気熱交換器９から膨張機１０の間のＸ点とを連結
するように設けられ，この温風バイパス路１４には弁１
８が介装してある。このバイパス弁１８は，空気路を開
閉するダンパ構造のものであり，その開度が調整でき
る。この温風バイパス路１４の空気取入端は，図１のＸ
点のほか，空気冷却器８と空気対空気熱交換器９の間の
ｐ点，主圧縮機７と空気冷却器８との間のｑ点，補助冷
却器１２と主圧縮機７との間のｒ点または補助圧縮機１
１と補助冷却器１２の間のｓ点であってもよい。いずれ
のｐ〜ｓ点でも，冷凍機Ａの駆動中は０℃以上の圧縮空
気が流れていることになる。In the example shown in FIG. 1, the hot air bypass passage 14 is provided at a point b between the air passage 3 and the air-to-air heat exchanger 9 and between the air-to-air heat exchanger 9 and the expander 10. The hot air bypass passage 14 is provided with a valve 1.
8 are interposed. The bypass valve 18 has a damper structure for opening and closing an air passage, and its opening can be adjusted. The air intake end of the hot air bypass passage 14 is connected to the X in FIG.
In addition to the points, the p point between the air cooler 8 and the air-to-air heat exchanger 9, the q point between the main compressor 7 and the air cooler 8, and the point between the auxiliary cooler 12 and the main compressor 7 R point or auxiliary compressor 1
It may be a point s between 1 and the auxiliary cooler 12. At any point p to s, the compressed air of 0 ° C. or higher flows during the operation of the refrigerator A.
【００２０】このように図１の装置は，弁１５を介装し
た第１のバイパス路１３と，弁１８を介装した温風バイ
パス路１４（第２のバイパス路）を設けたものである
が，さらに，膨張機１０から第１バイバス路１３を経て
空気対空気熱交換器９に至る空気路の最も低い位置にド
レン抜き１９が設けられ，また，膨張機１０を出た空気
を要冷却室Ｂに導く空気路に着氷器２０が設置されてい
る。この着氷器２０はメッシュフイルタを空気流路を横
切るように張り渡したものである。As described above, the apparatus shown in FIG. 1 is provided with the first bypass passage 13 provided with the valve 15 and the hot air bypass passage 14 (second bypass passage) provided with the valve 18. In addition, a drain vent 19 is provided at the lowest position of the air passage from the expander 10 to the air-to-air heat exchanger 9 via the first bypass path 13, and the air exiting the expander 10 needs to be cooled. An ice accumulator 20 is installed in an air passage leading to the chamber B. The ice accumulator 20 has a mesh filter stretched across the air flow path.
【００２１】さらに，着氷器２０のメッシュフイルタに
付着した雪状物を着氷器２０の外側に随時排出するため
の手段２１が設けられている。この雪状物を排出する手
段２１は機械的なものであってもよいし，雪状物を融解
してドレンとするための熱的な手段であってもよい。こ
の点については後述する。Further, there is provided means 21 for discharging the snow-like matter attached to the mesh filter of the ice accumulator 20 to the outside of the ice accumulator 20 as needed. The means 21 for discharging the snow-like material may be mechanical or may be a thermal means for melting the snow-like material to drain. This will be described later.
【００２２】図１の装置の運転態様を以下に説明する。The operation of the apparatus shown in FIG. 1 will be described below.
【００２３】運転始期に要冷却室Ｂ内に大量の一般空気
が存在したり，運転途中に外気や周囲雰囲気の空気が要
冷却室Ｂに混入すると，冷凍機Ａを稼働中に，膨張機の
出側で微細な氷片が発生し，これが空気流に同伴して移
動し，最も堆積しやすいところに集積する。図１のよう
にメッシュフイルタをもつ着氷器２０を膨張機出側の空
気路に介装させておけば，そこに優先的に堆積する。そ
こで，この堆積した雪状物を除去することが必要とな
る。なお，系内で発生する氷片の集積物は空気中の浮遊
粒子と氷片との混合物であることが多く，厳密には水か
らなる雪や霜等とは区別されるので「雪状物」と呼ぶ。If a large amount of general air is present in the cooling required room B at the beginning of the operation, or if outside air or air in the surrounding atmosphere is mixed into the required cooling room B during the operation, the operation of the expander is stopped during the operation of the refrigerator A. Fine ice chips are generated on the exit side, move with the air flow, and accumulate where they are most likely to accumulate. If an ice accumulator 20 having a mesh filter as shown in FIG. 1 is interposed in the air passage on the outlet side of the expander, the ice accumulates preferentially there. Therefore, it is necessary to remove the accumulated snow-like matter. The accumulation of ice fragments generated in the system is often a mixture of suspended particles in the air and ice fragments, and is strictly distinguished from snow and frost, etc., which consist of water. ".
【００２４】雪状物が堆積すると通常運転において膨張
機出側の空気圧が高まるので，それを検知し，その検出
値が一定値を超えたら，除雪運転に入る。この除雪運転
の主モードは，第１バイパス路１５への通気と温風バイ
パス路１４への温風供給である。その手順は図１の例で
は次のとおりである。When snow accumulates, the air pressure on the exit side of the expander increases during normal operation. This is detected, and when the detected value exceeds a certain value, the operation for snow removal is started. The main modes of the snow removal operation are ventilation to the first bypass 15 and supply of hot air to the hot air bypass 14. The procedure in the example of FIG. 1 is as follows.
【００２５】先ず冷凍機Ａの駆動を止め，ダンパ１６と
ダンパ１７を閉じ，弁１５を開く。また，温風バイパス
路１４の弁１８を開く。これにより，冷凍機Ａ内の空気
圧はどの位置でもほぼ等圧の大気圧に近くなる。First, the operation of the refrigerator A is stopped, the dampers 16 and 17 are closed, and the valve 15 is opened. Further, the valve 18 of the hot air bypass passage 14 is opened. Thereby, the air pressure in the refrigerator A becomes almost equal to the atmospheric pressure at any position.
【００２６】このように冷凍機Ａ内の圧が下がったら，
その状態で冷凍機Ａを駆動する。すると，図１のように
Ｘ−Ｙ点の温風バイパス路１４を設けた例では，空気対
空気熱交換器９→膨張機１０→バイパス路１３→空気対
空気熱交換器９→圧縮機１１へと流れる第１の空気回路
と，空気対空気熱交換器９→温風バイパス路１４→空気
対空気熱交換器９→圧縮機１１へと流れる第２の空気回
路が形成される。第１空気回路は第２空気回路より当初
は抵抗が大きいので，第２空気回路により多くの空気が
流れる。As described above, when the pressure in the refrigerator A decreases,
In this state, the refrigerator A is driven. Then, in the example in which the hot air bypass path 14 at the XY point is provided as shown in FIG. 1, the air-to-air heat exchanger 9 → the expander 10 → the bypass path 13 → the air-to-air heat exchanger 9 → the compressor 11 And a second air circuit flowing from the air-to-air heat exchanger 9 → the hot air bypass path 14 → the air-to-air heat exchanger 9 → the compressor 11 is formed. Because the first air circuit initially has a higher resistance than the second air circuit, more air flows through the second air circuit.
【００２７】必要に応じて補助冷却器１２と空気冷却器
８への冷却水の通水量を低下させるかまたは停止して，
冷凍機Ａを駆動していると，系内の循環空気の温度は次
第に上昇し，第１空気回路の膨張機１０から出る空気温
度も０℃以上になり，さらに上昇を続ける。すると，低
温側の空気路に堆積していた雪状物は融解を始め，この
融解に応じてさらに通気量が多くなり，さらに空気温度
も上昇し，やがて雪状物は完全に融解してドレンとな
る。この間，温風バイパス路１４の弁１８を徐々に絞っ
たり，圧縮機の回転数を調整したりして，最も効率よく
且つ短時間に融解が完了するように制御することができ
る。If necessary, the flow rate of the cooling water to the auxiliary cooler 12 and the air cooler 8 is reduced or stopped.
When the refrigerator A is driven, the temperature of the circulating air in the system gradually increases, and the temperature of the air exiting from the expander 10 of the first air circuit also becomes 0 ° C. or higher, and further increases. Then, the snow-like material accumulated in the air passage on the low-temperature side begins to melt, the ventilation increases further in accordance with this melting, the air temperature also rises, and eventually the snow-like material completely melts and drains. Becomes During this time, it is possible to control the valve 18 of the hot air bypass passage 14 gradually or to adjust the rotational speed of the compressor so that melting is completed most efficiently and in a short time.
【００２８】この除雪運転によって管内で発生したドレ
ンは，管路の最も低い位置に設けられたドレン抜き１９
の部分に自然に集液し，この集液を系外に排出する。ま
た，着氷器２０内で融解したドレンも着氷器２０に設け
たドレン抜きから系外に排出する。これにより，除雪運
転は終了するが，このまま要冷却室Ｂに冷気を送気する
平常運転に切り換えると，暖まった配管路を経て冷気が
供給されるので，暖まった配管路を冷却する操作を先ず
行う。これは，ダンパ１６と１７を閉，バイパス弁１５
を開としたまま，温風バイパス路１４の弁１８を閉とし
て運転すればよい。この予冷運転により，除雪運転時に
暖まった管路は冷却されるので，次いで，ダンパ１６，
１７を開き，バイパス弁１５を閉じて平常運転に切り換
える。これにより，要冷却室Ｂには暖気が供給されるの
が防止され，要冷却室Ｂに熱的影響を与えることなく，
平常運転に復帰できる。The drain generated in the pipe by the snow removing operation is removed by a drain drain 19 provided at the lowest position of the pipe.
The liquid is naturally collected in the area of, and the collected liquid is discharged out of the system. Also, the drain melted in the ice accumulator 20 is discharged out of the system through a drain provided in the ice accumulator 20. As a result, the snow removal operation is completed. However, if the operation is switched to the normal operation in which the cool air is supplied to the cooling required room B as it is, the cool air is supplied through the heated piping, so that the operation of cooling the heated piping is first performed. Do. This means that the dampers 16 and 17 are closed and the bypass valve 15 is closed.
The operation may be performed with the valve 18 of the hot air bypass passage 14 closed while keeping the valve open. By this pre-cooling operation, the pipeline heated during the snow removing operation is cooled.
17 is opened and the bypass valve 15 is closed to switch to normal operation. Thereby, the supply of warm air to the cooling required room B is prevented, and the cooling required room B is not affected thermally.
It can return to normal operation.
【００２９】この除雪運転によって発生したドレン中に
は，雪結晶の核となって雪状物中に存在した空気中の塵
埃や微生物なども，そのまま同伴してくる。したがっ
て，この除雪運転を行うことにより，要冷却室Ｂ内に存
在したり，要冷却室Ｂ内に入り込んだ塵埃や微生物が除
去されることになり，要冷却室Ｂの空気の冷却と空気の
浄化が同時に行われる。In the drain generated by the snow removing operation, dust and microorganisms in the air which have been present in the snow-like material as nuclei of the snow crystals are also accompanied. Therefore, by performing this snow removal operation, dust and microorganisms existing in the cooling required room B or having entered the required cooling required room B are removed. Purification takes place simultaneously.
【００３０】前記の除雪運転は，温風バイパス路１４の
温風取入端（図１のＸ点）を，前記した図中のｐ，ｑ，
ｒ，ｓの，どの点にしても同様であり，いずれの場合に
も，膨張機１０の出側の空気は０℃以上となり，運転に
つれてさらに上昇を続けるので雪状物の融雪が行われ
る。いずれにしても，膨張機１０の出側の空気を最高４
０℃，場合によっては５０℃とすることもできる。In the above-described snow removal operation, the hot air intake end (point X in FIG. 1) of the hot air bypass passage 14 is set to p, q,
The same is true at any point of r and s. In any case, the air at the outlet side of the expander 10 becomes 0 ° C. or higher and continues to rise as the operation proceeds, so that snow melting of the snow-like material is performed. In any case, the air on the outlet side of the expander 10 should be
The temperature can be set to 0 ° C. and, in some cases, 50 ° C.
【００３１】なお，この除雪運転をより短時間に終了す
るために，雪状物が堆積しやすい箇所に予め外熱式ヒー
タを取付けておき，除雪運転とこのヒータによる外熱供
給を組み合わせて，雪状物の融解をさらに促進すること
もできる。管路内または管路外側に取付けるヒータとし
ては面熱式のベルトヒータが便宜である。また着氷器２
０のメッシュフイルタに外熱式ヒータの熱を伝達できる
ようにして，メッシュフイルタに堆積した雪状物を外熱
式に融解することもできる。このようのヒータ付きフイ
ルタとしては，ヒータ付きネットまたはメッシュ，或い
はフイン付きヒータなどを使用するのが便宜である。In order to complete the snow removing operation in a shorter time, an external heat type heater is previously installed at a place where snow-like substances are likely to accumulate, and the snow removing operation and the external heat supply by this heater are combined. Melting of the snow can be further enhanced. A surface-heating type belt heater is conveniently used as a heater mounted inside or outside the pipeline. Ice maker 2
The heat of the externally-heated heater can be transmitted to the mesh filter of No. 0 so that the snow-like material deposited on the mesh filter can be melted by the externally-heated type. As such a filter with a heater, it is convenient to use a net or mesh with a heater, a heater with a fin, or the like.
【００３２】以上の図１の装置は，低圧空気路に，より
高圧の０℃以上の空気を導入して除雪運転を行う低圧方
式と言える。次に，高圧空気路に高温空気を導入して除
雪運転を行う本発明の別の態様（高圧方式）の空気冷媒
式冷凍装置を図２に示す。The apparatus shown in FIG. 1 can be said to be a low-pressure system in which a higher-pressure air at 0 ° C. or higher is introduced into a low-pressure air passage to perform a snow removal operation. Next, FIG. 2 shows an air-refrigerant refrigeration apparatus according to another embodiment (high-pressure system) of the present invention in which high-temperature air is introduced into a high-pressure air path to perform a snow removal operation.
【００３３】図２の装置は，前記の温風バイパス路１４
の位置を，図２のＷ−Ｚの位置に変更した以外は，図１
の装置と実質的に同じ機器構成を有する本発明装置を示
したものである。したがって，図２において，図１と同
じ符号を付した機器は，図１で説明したものと同じ内容
のものである。The apparatus shown in FIG.
1 was changed to the position of WZ in FIG.
This shows an apparatus of the present invention having substantially the same equipment configuration as the apparatus described above. Therefore, in FIG. 2, the devices denoted by the same reference numerals as those in FIG. 1 have the same contents as those described in FIG.
【００３４】図２の装置においては，空気対空気熱交換
器９から膨張機１０に至るまでの膨張機１０の入口側空
気路（Ｚ点）と，主圧縮機７から空気冷却器８に至る空
気路（Ｗ点）との間を温風バイパス路２２で連結し，こ
の温風バイパス路２２に弁２３を介装した例を示してい
る。この場合，弁２３を開くと，空気冷却器８および空
気対空気熱交換器９が空気抵抗となって，温風バイパス
路２２側に多くの空気が流れることになる。したがっ
て，空気冷却器８および空気対空気熱交換器９によって
冷却される空気量が少なくなり，膨張機１０にはより高
温の圧縮空気が送り込まれる。In the apparatus shown in FIG. 2, the air passage (Z point) on the inlet side of the expander 10 from the air-to-air heat exchanger 9 to the expander 10, and the air compressor 8 from the main compressor 7 An example is shown in which an air passage (point W) is connected by a hot air bypass passage 22 and a valve 23 is interposed in the hot air bypass passage 22. In this case, when the valve 23 is opened, the air cooler 8 and the air-to-air heat exchanger 9 become air resistance, so that much air flows to the hot air bypass passage 22 side. Therefore, the amount of air cooled by the air cooler 8 and the air-to-air heat exchanger 9 is reduced, and hotter compressed air is sent to the expander 10.
【００３５】この温風バイパス路２２への空気取入端
は，図２のＷの位置以外に，図のｔ，ｕまたはｖで示す
位置であってもよい。図のｔ点からＺ点に連結した場合
には，弁２３を開けた状態では，空気対空気熱交換器９
を経ない空気が膨張機１０に送り込まれ，ｕ点からＺ点
に連結した場合には，圧縮機７，空気冷却器８および空
気対空気熱交換器９を経ない空気が膨張機１０に送り込
まれ，ｖ点からＺ点に連結した場合には，補助冷却器１
２，圧縮機７，空気冷却器８および空気対空気熱交換器
９を経ない空気が膨張機１０に送り込まれることにな
る。いずれにしても温風バイパス路２２は，圧縮機を出
て膨張機に入る前の空気路のうち空気冷却器または空気
対空気熱交換器に入る前の空気路から高温圧縮空気を取
入れ，これを圧縮機の入口側空気路に供給するものであ
るから，そのバイバス弁２３を開くと膨張機１０には通
常運転よりも高温の空気が送り込まれることになる。The air intake end to the hot air bypass passage 22 may be located at a position indicated by t, u, or v in FIG. When the connection is made from the point t to the point Z in the drawing, the air-to-air heat exchanger 9 is opened with the valve 23 opened.
When the air that has not passed through the compressor 7, the air cooler 8, and the air-to-air heat exchanger 9 is sent to the expander 10, the air that has not passed through the expander 10 is sent to the expander 10. When connected from point v to point Z, the auxiliary cooler 1
2, the air that has not passed through the compressor 7, the air cooler 8, and the air-to-air heat exchanger 9 is sent to the expander 10. In any case, the hot air bypass passage 22 takes in high-temperature compressed air from the air passage before exiting the compressor and entering the expander before entering the air cooler or air-to-air heat exchanger. Is supplied to the air passage on the inlet side of the compressor, so that when the bypass valve 23 is opened, air at a higher temperature than in the normal operation is sent to the expander 10.
【００３６】この温風バイパス路２２を用いた装置で
も，図１で説明したのと同様の操作で除雪運転を行うこ
とができる。すなわち，ダンパ１６と１７を閉じ，バイ
パス弁１５とバイパス弁２３を開いて装置を稼働すれば
よい。この稼働を始めると，膨張機１０の出側の空気は
徐々に高まり，やがて０℃以上となり，さらに高温にな
る。これによって，管路内の雪状物は融解し，図１で説
明したのと同様に，ドレンとして，系外に排出される。
除雪運転終了後に平常運転に復帰するには，図１の装置
で説明したように，温風バイパス路２２の弁２３だけを
先ず閉じて，管路の予冷運転を行ってから，ダンパ１
６，１７を開き，弁１５を閉じて平常運転に切換えれば
よい。The apparatus using the hot air bypass passage 22 can also perform the snow removing operation by the same operation as described with reference to FIG. That is, the device may be operated with the dampers 16 and 17 closed and the bypass valve 15 and the bypass valve 23 opened. When this operation is started, the air on the outlet side of the expander 10 gradually rises, eventually becomes 0 ° C. or higher, and further rises in temperature. As a result, the snow-like matter in the pipeline melts and is discharged out of the system as a drain as described with reference to FIG.
In order to return to the normal operation after the snow removal operation, as described with reference to the apparatus in FIG. 1, only the valve 23 of the hot air bypass passage 22 is first closed, and the pre-cooling operation of the pipeline is performed.
It is sufficient to open the valves 6 and 17 and close the valve 15 to switch to normal operation.
【００３７】図２の装置でも，図１の装置と全く同様に
して，着氷器２０を使用し，また除雪手段２１を用いた
り，補助ヒータを使用して，除雪運転を一層効率良く行
うようにすることができる。The apparatus shown in FIG. 2 uses the ice accumulator 20, the snow removing means 21 and the auxiliary heater to perform the snow removing operation more efficiently in the same manner as the apparatus shown in FIG. Can be
【００３８】着氷器２０としては，前記したように，空
気の流路を横切るようにメッシュフイルタを配置した構
成のものを使用するのがよく，これにより，空気中の浮
遊粒子と氷片をメッシュフイルタに付着堆積させること
ができる。メッシュフイルタ上に形成された雪状物は，
前記の融雪運転によってドレンに融解させることができ
るが，さらに，機械的な掻き落とし手段を設けておくこ
ともできる。As described above, the ice accumulator 20 preferably has a structure in which a mesh filter is arranged so as to cross the air flow path. It can be deposited on a mesh filter. The snow-like object formed on the mesh filter
The drain can be melted by the above-mentioned snow melting operation, but a mechanical scraping means can be further provided.
【００３９】雪状物の掻き落とし手段をもつ着氷器とし
ては，ループ状としたメッシュフイルタをロール間にエ
ンドレスベルト状に回動可能に張り渡し，このメッシュ
ベルトを空気通路を横切るように設置すると共に，この
メッシュベルト上に堆積する雪状物をベルトの端部で掻
き落とすブラシや羽根を取付けたものが好適である。掻
き落とした雪状物はスクリュー式搬送機やピストン方式
によって機械的に系外に排出するか，雪溜めにヒータを
内装させておき，雪溜め内の雪状物を該ヒータで融解
し，生成したドレンを器外に排出するようにしてもよ
い。As an ice accumulator having means for scraping off snow-like objects, a loop-shaped mesh filter is rotatably stretched between rolls in the form of an endless belt, and the mesh belt is installed so as to cross the air passage. In addition, it is preferable that a brush or a blade for scraping off the snow-like material deposited on the mesh belt at the end of the belt is attached. The scraped snow-like material is mechanically discharged to the outside of the system using a screw-type conveyor or a piston system, or a heater is installed inside the snow pit, and the snow-like material in the snow pit is melted by the heater to generate the snow-like material. The drain that has been drained may be discharged outside the vessel.
【００４０】また，メッシュフイルタに付着した雪状物
をそのままヒータ加熱してドレンを生成させるようにす
ることもできる。この場合には，メッシュフイルタ自身
を通電加熱により発熱する材料で形成しておき，雪状物
が該フイルタ上に堆積したら通電を開始し，それをドレ
ンとして集液して器外に排出するようにしたもの，また
は，メッシュフイルタとは別にヒータ部材を隣接または
接合しておき，同様に通電加熱によりメッシュフイルタ
上の雪状物をドレンに融解し，それを集液して器外に排
出するようにしたものが使用できる。この通電加熱によ
る雪状物のドレン化は，本発明装置の融雪運転と併用し
て行うこともできるが，単独して行うこともできる。Further, it is also possible to generate a drain by directly heating the snow-like material attached to the mesh filter with a heater. In this case, the mesh filter itself is formed of a material that generates heat by energizing and heating, and when snow-like material is deposited on the filter, energization is started, and the mesh is collected as a drain and discharged out of the vessel. In addition, a heater member is placed adjacent to or joined separately from the mesh filter or the mesh filter, and similarly, the snow-like material on the mesh filter is melted into drain by electric heating, and the liquid is collected and discharged out of the vessel. You can use what you have. The drainage of the snow-like material by the electric heating can be performed in combination with the snow melting operation of the apparatus of the present invention, or can be performed alone.
【００４１】なお，このような着氷器２０と除雪手段２
１は，要冷却室Ｂへの低温空気供給側空気路６に設けて
おくほか，要冷却室Ｂから冷凍機Ａへのレタン側空気路
３に設けておくこともできる。後者の場合には，要冷却
室Ｂの内部で発生した氷片や浮遊物質を冷凍機Ａに入る
前で捕集することができる。また，空気路６や３に複数
台の着氷器を並列して配置し，これを切換え式に利用す
る構成としてもよい。さらに複数の着氷器を直列に配置
して複数箇所での捕集を行なうようにしてもよい。The icing device 20 and the snow removing means 2
1 can be provided in the low-temperature air supply side air passage 6 to the cooling required room B, or can be provided in the urethane side air passage 3 from the cooling required room B to the refrigerator A. In the latter case, ice chips and suspended matter generated inside the cooling required room B can be collected before entering the refrigerator A. Alternatively, a plurality of ice accumulators may be arranged in parallel in the air passages 6 and 3 and may be used in a switching manner. Further, a plurality of ice accumulators may be arranged in series to perform collection at a plurality of locations.
【００４２】[0042]
【発明の効果】以上説明したように，本発明によれば，
要冷却室の空気を空気冷媒式冷凍機の冷媒として取入
れ，該冷凍機で冷却された冷媒空気を要冷却室に直接的
に吹き出して該室を冷却する場合に，空気中に混入した
湿分と浮遊物質が管路内で雪状物として堆積したとき
に，空気路の切換えという簡単な操作でこれを融解除去
することができる。したがって，凍結トラブルによる効
率低下や休止を簡単な操作で未然に防止できる。As described above, according to the present invention,
When the air in the cooling required room is taken in as the refrigerant of the air-cooled refrigerator, and the refrigerant air cooled by the refrigerator is directly blown out to the required cooling room to cool the room, the moisture contained in the air is reduced. When airborne substances accumulate as snow in the pipeline, they can be melted and removed by a simple operation of switching air paths. Therefore, it is possible to prevent a decrease in efficiency or a pause due to a freezing trouble with a simple operation.
【００４３】加えて，管路内で生成した雪状物には，空
気中の塵埃や微生物も取り込まれているので，この雪状
物の生成と除去によって，要冷却室には清浄な空気が送
り込まれる。このため，要冷却室の空気を清浄にできる
という効果を奏する。この空気浄化の効果により，食品
の保存や運搬用の冷凍庫，冷凍車，冷凍コンテナ，食品
陳列棚などからなる要冷却室を形成するのに特に有益で
ある。In addition, since dust and microorganisms in the air are also taken into the snow-like material generated in the pipeline, clean air is generated in the cooling required room by the generation and removal of the snow-like material. Sent in. For this reason, there is an effect that the air in the cooling required room can be cleaned. The effect of the air purification is particularly useful for forming a cooling room including a freezer, a freezing car, a freezing container, a food display shelf, and the like for storing and transporting food.
【図１】本発明の空気冷媒式冷凍装置の１実施例の機器
配置を示す図である。FIG. 1 is a diagram showing the equipment arrangement of an embodiment of an air-refrigerant refrigeration apparatus of the present invention.
【図２】本発明の空気冷媒式冷凍装置の他の実施例の機
器配置を示す図である。FIG. 2 is a diagram showing a device arrangement of another embodiment of the air refrigerant refrigeration apparatus of the present invention.
Ａ 空気冷媒式冷凍機 Ｂ 要冷却室 ７ 主空気圧縮機 ８ 空気冷却器 ９ 空気対空気熱交換器 １０ 空気膨張機 １１ 補助圧縮機 １２ 補助冷却器 １３ 第１のバイバス路 １４ 温風バイパス路 １５ 第１のバイバス路の弁 １６，１７ ダンパ １８ 温風バイパス路１３の弁 １９ ドレン抜き ２０ 着氷器 ２１ 除雪手段 ２２ 他の実施例の温風バイパス路 ２３ 温風バイパス路２２の弁 DESCRIPTION OF SYMBOLS A Air-refrigerant refrigerator B Cooling required room 7 Main air compressor 8 Air cooler 9 Air-to-air heat exchanger 10 Air expander 11 Auxiliary compressor 12 Auxiliary cooler 13 First bypass path 14 Hot air bypass path 15 Valves of the first bypass path 16, 17 Damper 18 Valve of the hot air bypass path 13 19 Drainage 20 Ice maker 21 Snow removing means 22 Hot air bypass path of another embodiment 23 Valve of the hot air bypass path 22
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宇田 素久 東京都港区元赤坂一丁目２番７号 鹿島建 設株式会社内 (72)発明者 古川 和夫 神奈川県伊勢原市沼目二丁目１番49号 日 本発条株式会社伊勢原工場内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor: Motohisa Uda 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor: Kazuo Furukawa 2-49-1, Numame, Isehara City, Kanagawa Prefecture No. Nihon Honjo Co., Ltd.Isehara Factory
Claims (10)
気対空気熱交換器および膨張機を空気の流れの順に配置
し，要冷却室内の空気を前記の空気対空気熱交換器を経
て該圧縮機に取入れ，該膨張機を出た空気を該要冷却室
内に吹き出すようにした空気冷媒式冷凍装置において，
該膨張機を出た空気の一部または全部を要冷却室を迂回
して該空気対空気熱交換器に戻すための弁介装の第１の
バイパス路と，圧縮機を出て膨張機に入る前の空気路か
ら０℃以上の空気を取入れ，これを空気対空気熱交換器
の入口側空気路に供給するための弁介装の温風バイバス
路を設けたことを特徴とする空気冷媒式冷凍装置。A compressor, an air cooler, an air-to-air heat exchanger, and an expander are arranged in the air path in the order of air flow, and the air in the cooling required room is supplied to the air-to-air heat exchanger. In the air-refrigerant refrigeration apparatus, the air taken out of the expander is blown into the required cooling chamber through the compressor.
A first bypass having valve interposition for returning part or all of the air exiting the expander to the air-to-air heat exchanger, bypassing the cooling chamber, and exiting the compressor to the expander; An air refrigerant having a valve-mounted hot-air bypass path for taking in air of 0 ° C. or more from an air path before entering the air path and supplying the air to an inlet-side air path of an air-to-air heat exchanger. Type refrigeration equipment.
気対空気熱交換器および膨張機を空気の流れの順に配置
し，要冷却室内の空気を前記の空気対空気熱交換器を経
て該圧縮機に取入れ，該膨張機を出た空気を該要冷却室
内に吹き出すようにした空気冷媒式冷凍装置において，
該膨張機を出た空気の一部または全部を要冷却室を迂回
して該空気対空気熱交換器に戻すための弁介装の第１の
バイパス路と，圧縮機を出て膨張機に入る前の空気路の
うち空気冷却器または空気対空気熱交換器に入る前の空
気路から高温圧縮空気を取入れ，これを膨張機の入口側
空気路に供給するための弁介装の温風バイバス路を設け
たことを特徴とする空気冷媒式冷凍装置。2. A compressor, an air cooler, an air-to-air heat exchanger, and an expander are arranged in the air path in the order of air flow, and the air in the cooling required room is supplied to the air-to-air heat exchanger. In the air-refrigerant refrigeration apparatus, the air taken out of the expander is blown into the required cooling chamber through the compressor.
A first bypass having valve interposition for returning part or all of the air exiting the expander to the air-to-air heat exchanger, bypassing the cooling chamber, and exiting the compressor to the expander; The hot air of the valve interposition for taking hot compressed air from the air passage before entering the air cooler or the air passage before entering the air-to-air heat exchanger and supplying it to the inlet air passage of the expander An air-refrigerant refrigeration system comprising a bypass path.
機と空気冷却器の間の空気路，空気冷却器と空気対空気
熱交換器の間の空気路，または空気対空気熱交換器と膨
張機の間の空気路に接続される請求項１に記載の空気冷
媒式冷凍装置。3. The air intake end to the hot air bypass path may be an air path between a compressor and an air cooler, an air path between an air cooler and an air-to-air heat exchanger, or an air-to-air heat exchanger. The air-refrigerant refrigeration apparatus according to claim 1, wherein the refrigeration apparatus is connected to an air passage between the exchanger and the expander.
機と空気冷却器の間の空気路または空気冷却器と空気対
空気熱交換器の間の空気路に接続される請求項２に記載
の空気冷媒式冷凍装置。4. The air intake end to the hot air bypass path is connected to an air path between the compressor and the air cooler or an air path between the air cooler and the air-to-air heat exchanger. 3. The air-refrigerant refrigeration apparatus according to 2.
空気熱交換器に至る空気路の最も低い位置にドレン抜き
が設けられる請求項１または２に記載の空気冷媒式冷凍
装置。5. The air-refrigerant refrigeration system according to claim 1, wherein a drain vent is provided at a lowest position of an air passage from the expander to the air-to-air heat exchanger via the first bypass path.
路に着氷器が設置される請求項１または２に記載の空気
冷媒式冷凍装置。6. The air-refrigerant refrigeration system according to claim 1, wherein an ice accumulator is installed in an air passage for guiding air that has exited the expander to a cooling required chamber.
横切るように張り渡したものである請求項６に記載の空
気冷媒式冷凍装置。7. The air-refrigerant refrigerating apparatus according to claim 6, wherein the ice accumulator is formed by extending a mesh filter so as to cross the air flow path.
混合物体が捕獲される請求項６または７に記載の空気冷
媒式冷凍装置。8. The air-refrigerant refrigeration system according to claim 6, wherein the ice accumulator captures a mixture of suspended particles and ice pieces in the air.
空気熱交換器に至る空気路に外熱式補助ヒータが取付け
られる請求項１または２に記載の空気冷媒式冷凍装置。9. The air-refrigerant refrigeration system according to claim 1, wherein an externally-heated auxiliary heater is attached to an air passage extending from the expander to the air-to-air heat exchanger via the first bypass path.
冷凍庫である請求項１または２に記載の空気冷媒式冷凍
装置。10. The air-refrigerant refrigeration system according to claim 1, wherein the cooling room is a freezer for storing or transporting food.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30955597A JP3824757B2 (en) | 1997-10-24 | 1997-10-24 | Air refrigerant refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30955597A JP3824757B2 (en) | 1997-10-24 | 1997-10-24 | Air refrigerant refrigeration system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11132582A true JPH11132582A (en) | 1999-05-21 |
| JP3824757B2 JP3824757B2 (en) | 2006-09-20 |
Family
ID=17994433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30955597A Expired - Fee Related JP3824757B2 (en) | 1997-10-24 | 1997-10-24 | Air refrigerant refrigeration system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3824757B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006011297A1 (en) * | 2004-07-30 | 2006-02-02 | Mitsubishi Heavy Industries, Ltd. | Air refrigerant type cooling apparatus |
| US7322207B2 (en) | 2004-07-30 | 2008-01-29 | Mitsubishi Heavy Industries, Ltd. | Air refrigerant cooling apparatus and air refrigeration system using the air refigerant cooling apparatus |
| JP2008298322A (en) * | 2007-05-29 | 2008-12-11 | Mayekawa Mfg Co Ltd | Air refrigerant type refrigerating device |
| US8141380B2 (en) | 2004-07-30 | 2012-03-27 | Mitsubishi Heavy Industries, Ltd. | Air refrigerant type cooling apparatus and air refrigerant cooling/heating system using refrigerant type cooling apparatus |
| JP2012137218A (en) * | 2010-12-24 | 2012-07-19 | Mayekawa Mfg Co Ltd | Method and apparatus for defrosting air refrigerant type refrigerator |
| US9016083B2 (en) | 2004-11-29 | 2015-04-28 | Mitsubishi Heavy Industries, Ltd. | Air refrigerant type freezing and heating apparatus |
| JP2019113207A (en) * | 2017-12-21 | 2019-07-11 | 三菱重工冷熱株式会社 | Cooler using air refrigerant cycle |
| EP3670909A1 (en) * | 2018-12-19 | 2020-06-24 | Mirai Intex Sagl | Air cooling machine |
| WO2024053205A1 (en) * | 2022-09-05 | 2024-03-14 | 株式会社前川製作所 | Ultra low temperature refrigeration system |
| WO2024075440A1 (en) * | 2022-10-07 | 2024-04-11 | 三菱重工業株式会社 | Refrigerated container |
-
1997
- 1997-10-24 JP JP30955597A patent/JP3824757B2/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006011297A1 (en) * | 2004-07-30 | 2006-02-02 | Mitsubishi Heavy Industries, Ltd. | Air refrigerant type cooling apparatus |
| US7322207B2 (en) | 2004-07-30 | 2008-01-29 | Mitsubishi Heavy Industries, Ltd. | Air refrigerant cooling apparatus and air refrigeration system using the air refigerant cooling apparatus |
| US8141380B2 (en) | 2004-07-30 | 2012-03-27 | Mitsubishi Heavy Industries, Ltd. | Air refrigerant type cooling apparatus and air refrigerant cooling/heating system using refrigerant type cooling apparatus |
| US8225619B2 (en) | 2004-07-30 | 2012-07-24 | Mitsubishi Heavy Industries, Ltd | Air-refrigerant cooling apparatus with a warm gas defrost bypass pipe |
| EP2952830A1 (en) | 2004-07-30 | 2015-12-09 | Mitsubishi Heavy Industries, Ltd. | Air-refrigerant cooling apparatus |
| US9016083B2 (en) | 2004-11-29 | 2015-04-28 | Mitsubishi Heavy Industries, Ltd. | Air refrigerant type freezing and heating apparatus |
| JP2008298322A (en) * | 2007-05-29 | 2008-12-11 | Mayekawa Mfg Co Ltd | Air refrigerant type refrigerating device |
| JP2012137218A (en) * | 2010-12-24 | 2012-07-19 | Mayekawa Mfg Co Ltd | Method and apparatus for defrosting air refrigerant type refrigerator |
| JP2019113207A (en) * | 2017-12-21 | 2019-07-11 | 三菱重工冷熱株式会社 | Cooler using air refrigerant cycle |
| EP3670909A1 (en) * | 2018-12-19 | 2020-06-24 | Mirai Intex Sagl | Air cooling machine |
| WO2024053205A1 (en) * | 2022-09-05 | 2024-03-14 | 株式会社前川製作所 | Ultra low temperature refrigeration system |
| WO2024075440A1 (en) * | 2022-10-07 | 2024-04-11 | 三菱重工業株式会社 | Refrigerated container |
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| Publication number | Publication date |
|---|---|
| JP3824757B2 (en) | 2006-09-20 |
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