JPH09126593A - Antifreezing structure of heat exchanger for supercooling water - Google Patents
Antifreezing structure of heat exchanger for supercooling waterInfo
- Publication number
- JPH09126593A JPH09126593A JP30823995A JP30823995A JPH09126593A JP H09126593 A JPH09126593 A JP H09126593A JP 30823995 A JP30823995 A JP 30823995A JP 30823995 A JP30823995 A JP 30823995A JP H09126593 A JPH09126593 A JP H09126593A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- water
- inner pipe
- pipe
- heat
- 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.)
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Links
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、過冷却水製造に
属するもので、詳しくは過冷却水用熱交換器の凍結防止
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to production of supercooled water, and more particularly to prevention of freezing of a heat exchanger for supercooled water.
【0002】[0002]
【従来の技術】従来、空調設備や食品冷却装置等に冷水
を供給する蓄氷型冷水装置がある。この蓄氷型冷水装置
は、図4に示すように、蓄氷タンク31と過冷却水用熱
交換器32(以下、「熱交換器32」と云う)との間を
循環路33で連通するとともに、前記熱交換器32と冷
凍機34との間を冷媒循環路35で連通した構成となっ
ている。この蓄氷型冷水装置は、電力料金の安い深夜電
力を利用して蓄氷タンク31内に氷を蓄えておき、食品
冷却装置等の操業時における負荷の要求に応じ、蓄氷タ
ンク31の上方から解氷水を供給するとともに、その下
部から冷水を取り出すようにしている。2. Description of the Related Art Conventionally, there is an ice storage type cold water device for supplying cold water to an air conditioner, a food cooling device and the like. As shown in FIG. 4, this ice storage type cold water device communicates with an ice storage tank 31 and a supercooled water heat exchanger 32 (hereinafter, referred to as “heat exchanger 32”) by a circulation path 33. At the same time, the heat exchanger 32 and the refrigerator 34 are connected by a refrigerant circulation path 35. This ice storage type cold water storage device stores ice in the ice storage tank 31 by using late-night electric power, which has a low electricity rate, and is installed above the ice storage tank 31 in response to a load demand during operation of a food cooling device or the like. In addition to supplying the deicing water from, cold water is taken out from the lower part.
【0003】ところで、この蓄氷型冷水装置の運転は、
蓄氷タンク31に水を満たした後冷凍機34を起動し
て、冷却媒体を熱交換器32内に供給して循環させると
ともに、蓄氷タンク31内の被冷却水を熱交換器32に
送り込んで熱交換し、過冷却された水を蓄氷タンク31
内へ還流する。蓄氷タンク31内において製氷が始まる
と、循環して熱交換器32に流入する被冷却水の温度が
低下して熱交換器32内で凍結が起き易くなり、特に水
温が1℃以下になると短時間の運転で凍結することが多
い。そこで、従来は、その対策として蓄氷タンク31か
ら熱交換器32までの間の循環路33の熱絶縁を悪くし
たり、或いは補助熱交換器(図示省略)を設けて積極的
に加熱する方法で熱交換器32の入口の水温を高めて対
処しているが、完全に凍結を防止するには至っていな
い。By the way, the operation of this ice storage type cold water device is as follows.
After the ice storage tank 31 is filled with water, the refrigerator 34 is activated to supply the cooling medium into the heat exchanger 32 for circulation, and at the same time, the cooled water in the ice storage tank 31 is sent to the heat exchanger 32. The heat-exchanged and supercooled water is stored in the ice storage tank 31.
Reflux into. When ice making starts in the ice storage tank 31, the temperature of the water to be cooled, which circulates and flows into the heat exchanger 32, lowers and freezing easily occurs in the heat exchanger 32, and particularly when the water temperature becomes 1 ° C. or less. It often freezes after a short period of operation. Therefore, conventionally, as a countermeasure, a method of worsening the heat insulation of the circulation path 33 between the ice storage tank 31 and the heat exchanger 32, or providing an auxiliary heat exchanger (not shown) for positive heating However, the water temperature at the inlet of the heat exchanger 32 is increased to deal with it, but it has not been possible to completely prevent freezing.
【0004】前記熱交換器32は、図4および図5に示
すように、外管32aを螺旋状に形成し、その内部に内
管32bを挿入した二重管構造であって、外管32aと
内管32bとの間に蓄氷タンク31から供給される被冷
却水が流通し、内管32b内には冷凍機34から供給さ
れる冷却媒体が流通する。したがって、被冷却水を内管
32bの外周から冷却して過冷却水を製造する構造とな
っているので、熱交換器32における凍結は、比較的出
口近傍で発生することが多く、その対策が要望されてい
る。また、同様の問題は、外管32aと内管32bとの
間に冷却媒体を流通させ、内管32b内に被冷却水を流
通させた場合にも生じている。As shown in FIGS. 4 and 5, the heat exchanger 32 has a double pipe structure in which an outer pipe 32a is formed in a spiral shape and an inner pipe 32b is inserted into the outer pipe 32a. Water to be cooled supplied from the ice storage tank 31 flows between the inner pipe 32b and the inner pipe 32b, and a cooling medium supplied from the refrigerator 34 flows into the inner pipe 32b. Therefore, because the structure is such that the water to be cooled is cooled from the outer circumference of the inner pipe 32b to produce supercooled water, freezing in the heat exchanger 32 often occurs in the vicinity of the outlet in many cases, and measures against it are often taken. Is requested. Further, the same problem also occurs when the cooling medium is circulated between the outer pipe 32a and the inner pipe 32b and the water to be cooled is circulated in the inner pipe 32b.
【0005】[0005]
【発明が解決しようとする課題】この発明は、上記問題
点に鑑み、過冷却水用熱交換器の凍結防止構造を提供す
ることを目的とするものである。SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a structure for preventing freezing of a heat exchanger for supercooled water.
【0006】[0006]
【課題を解決するための手段】この発明は、上記課題を
解決するためになされたものであって、外管と内管とよ
りなる二重管構造の過冷却水用熱交換器であって、この
過冷却水用熱交換器の出口近傍において、前記内管外周
面に所定長さの断熱部材を装着したことを特徴としてい
る。The present invention has been made to solve the above-mentioned problems, and is a heat exchanger for supercooled water having a double pipe structure including an outer pipe and an inner pipe. In the vicinity of the outlet of the heat exchanger for supercooled water, a heat insulating member of a predetermined length is attached to the outer peripheral surface of the inner pipe.
【0007】[0007]
【発明の実施の形態】つぎに、この発明の実施の形態に
ついて説明すると、この発明は、蓄氷型冷水装置に適用
される過冷却水用熱交換器(以下、「熱交換器」と云
う)の凍結防止構造に係るもので、特に外管と内管とに
より構成された二重管構造の熱交換器について効果的な
ものである。この発明は、前記熱交換器の出口近傍を断
熱構造とすることにより実現されている。前記熱交換器
の出口近傍における過冷却水は、進路変更や配管接続等
により、流通態様の変更を余儀なくされ、これに伴って
その過冷却状態が不安定となっている。この不安定な過
冷却状態に対し、熱交換作用を加えると、凍結要因が増
大することになるが、この発明にあっては、この不安定
な過冷却状態の部分に対する熱交換を遮断するように構
成したことが特徴となっている。すなわち、前記熱交換
器の出口近傍を断熱構造とすることにより実現してい
る。具体的には、前記熱交換器の出口近傍において、前
記内管を所定長さに亘って断熱構造としている。BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described. The present invention is a heat exchanger for supercooled water (hereinafter referred to as "heat exchanger") applied to an ice storage type cold water device. ), Which is particularly effective for a heat exchanger having a double pipe structure composed of an outer pipe and an inner pipe. The present invention is realized by providing a heat insulating structure near the outlet of the heat exchanger. The supercooled water in the vicinity of the outlet of the heat exchanger is forced to change its distribution mode due to a route change, pipe connection, etc., and the supercooled state thereof becomes unstable accordingly. If a heat exchange action is applied to this unstable supercooled state, the freezing factor will increase. However, in the present invention, the heat exchange to this unstable supercooled portion is shut off. It is characterized by the configuration. That is, this is realized by providing a heat insulating structure near the outlet of the heat exchanger. Specifically, in the vicinity of the outlet of the heat exchanger, the inner pipe has a heat insulating structure over a predetermined length.
【0008】前記断熱構造は、具体的には、前記熱交換
器の出口近傍において、前記内管の外周面に所定長さの
断熱部材を装着した構成としている。この断熱部材によ
り、過冷却水の不安定な過冷却状態の部分に対する凍結
要因を回避し、凍結を確実に防止する。そして、前記断
熱部材は、たとえば液化した冷却媒体(たとえばフロ
ン)との熱交換作用を効果的に遮断し、かつ着氷しにく
い部材によって構成されたものが適用され、たとえばシ
リコンゴム製の熱収縮チューブまたはテフロン製のチュ
ーブ等が用いられる。[0008] Specifically, the heat insulating structure has a structure in which a heat insulating member of a predetermined length is attached to the outer peripheral surface of the inner pipe near the outlet of the heat exchanger. With this heat insulating member, a freezing factor for an unstable supercooled portion of the supercooled water is avoided, and freezing is reliably prevented. The heat insulating member is made of, for example, a member that effectively blocks a heat exchange action with a liquefied cooling medium (for example, Freon) and is hard to be iced. A tube or a Teflon tube or the like is used.
【0009】[0009]
【実施例】以下、この発明の具体的実施例を図面に基づ
いて詳細に説明する。図1は、この発明を実施した蓄氷
型冷水装置の構成を示す説明図であり、図2は、過冷却
水用熱交換器の出口近傍を断面して示す説明図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing a configuration of an ice storage type cold water device embodying the present invention, and FIG. 2 is an explanatory view showing a cross section near an outlet of a supercooling water heat exchanger.
【0010】図1において、蓄氷型冷水装置は、冷凍機
1,過冷却水用熱交換器2(以下、「熱交換器2」と云
う)および蓄氷タンク3から構成されている。冷凍機1
は、たとえば液化した冷却媒体(たとえばフロン)を膨
張弁1aで減圧した後、熱交換器2を介して被冷却水を
冷却媒体(以下、「冷媒」と云う)の蒸発潜熱によって
直接冷却する方式を利用したものである。そして、熱交
換器2は、図1および図2に示すように、外管2aを螺
旋状に形成し、その内部に内管2bを挿入した二重管構
造であって、外管2aと内管2bとの間に蓄氷タンク3
から供給される被冷却水が流通し、内管2b内には冷凍
機1から供給される冷媒が流通する。したがって、被冷
却水を内管2bの外周から冷却して過冷却水とし、この
過冷却水を前記蓄氷タンク3に流入させている。尚、こ
の実施例では、内管2b内に冷媒を流通させたが、これ
を被冷却水を内管2b内に流通させ、冷媒を外管2aと
内管2bとの間に流通させることも実施に応じて好適で
ある。In FIG. 1, the ice storage type cold water system comprises a refrigerator 1, a heat exchanger 2 for supercooled water (hereinafter referred to as "heat exchanger 2") and an ice storage tank 3. Refrigerator 1
Is a method in which, for example, a liquefied cooling medium (for example, CFC) is decompressed by the expansion valve 1a, and then the water to be cooled is directly cooled by the latent heat of vaporization of the cooling medium (hereinafter referred to as “refrigerant”) via the heat exchanger 2. Is used. As shown in FIGS. 1 and 2, the heat exchanger 2 has a double pipe structure in which an outer pipe 2a is formed in a spiral shape and an inner pipe 2b is inserted therein, and the outer pipe 2a and the inner pipe 2a Ice storage tank 3 between pipe 2b
The water to be cooled supplied from the refrigerator 1 flows through, and the refrigerant supplied from the refrigerator 1 flows through the inner pipe 2b. Therefore, the water to be cooled is cooled from the outer periphery of the inner pipe 2b to be supercooled water, and the supercooled water is caused to flow into the ice storage tank 3. In this embodiment, the refrigerant is circulated in the inner pipe 2b, but the water to be cooled may be circulated in the inner pipe 2b and the refrigerant may be circulated between the outer pipe 2a and the inner pipe 2b. It is suitable depending on the implementation.
【0011】前記冷凍機1と前記内管2bとは、膨張弁
1aを介して冷媒供給路4により接続されるとともに、
冷媒還流路5により接続されており、冷媒が両者間を循
環する構成となっている。一方、前記蓄氷タンク3の下
部と前記外管2aの入口とは、給水ポンプ8を挿設した
冷水供給路6により接続されており、また前記外管2a
の出口と前記蓄氷タンク3とは、過冷却水還流路7によ
り接続されている。そして、前記蓄氷タンク3の上部に
は、負荷側(図示省略)からの還流水あるいは給水源
(図示省略)からの給水路9が接続されており、また前
記蓄氷タンク3の下部には、負荷側への冷水取出路10
が接続されている。The refrigerator 1 and the inner pipe 2b are connected by a refrigerant supply path 4 via an expansion valve 1a, and
They are connected by a refrigerant circulation path 5, and the refrigerant circulates between them. On the other hand, the lower portion of the ice storage tank 3 and the inlet of the outer pipe 2a are connected by a cold water supply passage 6 in which a water supply pump 8 is inserted, and the outer pipe 2a is also connected.
The outlet and the ice storage tank 3 are connected by a supercooled water return passage 7. Then, a return water from a load side (not shown) or a water supply passage 9 from a water supply source (not shown) is connected to the upper part of the ice storage tank 3, and the lower part of the ice storage tank 3 is , Cold water outlet 10 to the load side
Is connected.
【0012】さて、この発明の凍結防止構造は、前記熱
交換器2の出口近傍を断熱構造とすることにより実現さ
れており、より具体的には、図2に示すように、前記内
管2bの外周面に所定長さの断熱部材11を装着したも
のである。この断熱部材11は、たとえばシリコンゴム
製の熱収縮チューブまたはテフロン製のチューブ等を用
いている。前記凍結防止構造によれば、前記熱交換器2
内で熱交換した過冷却水は、前記熱交換器2の出口近傍
で過冷却状態が不安定になり凍結することが多いが、前
記内管2bに装着した断熱部材11が冷媒との熱交換を
遮断するので凍結を防止する。The antifreezing structure of the present invention is realized by providing a heat insulating structure near the outlet of the heat exchanger 2. More specifically, as shown in FIG. 2, the inner pipe 2b is formed. A heat insulating member 11 having a predetermined length is attached to the outer peripheral surface of the. As the heat insulating member 11, for example, a heat shrink tube made of silicon rubber or a tube made of Teflon is used. According to the antifreezing structure, the heat exchanger 2
The supercooled water that has undergone heat exchange inside is often frozen due to instability in the supercooled state near the outlet of the heat exchanger 2, but the heat insulating member 11 mounted on the inner pipe 2b exchanges heat with the refrigerant. To prevent freezing.
【0013】また、図3に示すように、内管2bにステ
ンレス鋼管を軸方向にベローズ成形した凹凸形状のもの
を用いた場合でも、前記断熱部材11として前記シリコ
ンゴム製の熱収縮チューブを用いれば、図2の実施例の
場合と同様の作用効果を奏し、かつ容易に対応すること
ができる。Also, as shown in FIG. 3, even when an inner tube 2b having a concavo-convex shape formed by bellows-molding a stainless steel tube is used, the heat-shrinkable tube made of silicon rubber is used as the heat insulating member 11. For example, it is possible to obtain the same operational effects as in the case of the embodiment shown in FIG.
【0014】前記蓄氷型冷水装置の運転は、蓄氷タンク
3に給水路9から水を所定水位まで供給した後、冷凍機
1を駆動して冷媒を冷媒供給路4を介して熱交換器2の
内管2b内へ供給し、熱交換後の冷媒は冷媒還流路5を
介して冷凍機1へ還流する。一方、蓄氷タンク3内の水
は、給水ポンプ8の駆動により冷水供給路6を介して熱
交換器2の外管2aと内管2bとの間に供給し、前記内
管2b内を流通する冷媒と熱交換し、過冷却水となって
過冷却還流路7を介して蓄氷タンク3内に流入する。そ
して、蓄氷タンク3内の水温が0℃以下となって氷片化
し、蓄氷タンク3内に所定量の氷を蓄える。In the operation of the ice storage type cold water device, after supplying water to the ice storage tank 3 from the water supply passage 9 to a predetermined water level, the refrigerator 1 is driven to supply the refrigerant through the refrigerant supply passage 4 to the heat exchanger. The refrigerant that has been supplied into the inner pipe 2b of the second heat exchanger 2 and has undergone heat exchange is returned to the refrigerator 1 through the refrigerant return passage 5. On the other hand, the water in the ice storage tank 3 is supplied between the outer pipe 2a and the inner pipe 2b of the heat exchanger 2 through the cold water supply passage 6 by the drive of the water supply pump 8 and circulates in the inner pipe 2b. It exchanges heat with the cooling medium to become supercooled water and flows into the ice storage tank 3 through the supercooled return path 7. Then, the water temperature in the ice storage tank 3 becomes 0 ° C. or lower, and the ice pieces are separated into pieces, and a predetermined amount of ice is stored in the ice storage tank 3.
【0015】ところで、前記蓄氷タンク3から前記熱交
換器2へ供給する被冷却水の温度が1℃近くまで低下す
ると、前記熱交換器2の出口近傍では、過冷却水が不安
定な状態となっているために凍結が起り易くなるが、前
記内管2bの外周面に装着した断熱部材11が冷媒と被
冷却水の熱交換を遮断して凍結要因を回避するので、前
記熱交換器2の出口近傍で凍結するのを防止し、過冷却
水を前記蓄氷タンク3へスムースに流入させる。By the way, when the temperature of the water to be cooled supplied from the ice storage tank 3 to the heat exchanger 2 drops to near 1 ° C., the supercooled water is unstable near the outlet of the heat exchanger 2. However, since the heat insulating member 11 mounted on the outer peripheral surface of the inner pipe 2b cuts off heat exchange between the refrigerant and the water to be cooled to avoid a freezing factor, the heat exchanger is Freezing is prevented in the vicinity of the outlet 2 and the supercooled water is allowed to smoothly flow into the ice storage tank 3.
【0016】[0016]
【発明の効果】以上説明したように、この発明は、外管
と内管とよりなる二重管構成の過冷却水用熱交換器であ
って、この過冷却水用熱交換器の出口近傍において、内
管外周面に所定長さの断熱部材を装着したので、過冷却
水が不安定な状態となっている出口近傍において、冷媒
と被冷却水の熱交換を遮断して凍結要因を回避すること
ができ、熱交換器の出口近傍での凍結を確実に防止する
ことができる。As described above, the present invention relates to a supercooling water heat exchanger having a double pipe structure composed of an outer pipe and an inner pipe, and in the vicinity of the outlet of the supercooling water heat exchanger. In the above, since a heat insulating member of a predetermined length was attached to the outer peripheral surface of the inner pipe, heat exchange between the refrigerant and the water to be cooled was blocked near the outlet where the supercooled water was in an unstable state to avoid freezing factors. Therefore, it is possible to reliably prevent freezing near the outlet of the heat exchanger.
【図1】この発明を実施した蓄氷型冷水装置の構成を示
す説明図である。FIG. 1 is an explanatory diagram showing a configuration of an ice storage type cold water device embodying the present invention.
【図2】図1の熱交換器の出口近傍を断面して示す説明
図である。FIG. 2 is an explanatory view showing a cross section near the outlet of the heat exchanger of FIG.
【図3】図2の熱交換器の内管形状の異なる実施例を断
面して示す説明図である。FIG. 3 is an explanatory view showing a cross-section of an example in which the inner tube shape of the heat exchanger of FIG. 2 is different.
【図4】従来の蓄氷型冷水装置の構成を示す説明図であ
る。FIG. 4 is an explanatory diagram showing a configuration of a conventional ice storage type cold water device.
【図5】図4の熱交換器の出口近傍を断面して示す説明
図である。5 is an explanatory view showing a cross section near the outlet of the heat exchanger of FIG. 4. FIG.
2 過冷却水用熱交換器 2a 外管 2b 内管 11 断熱部材 2 Heat exchanger for supercooled water 2a Outer pipe 2b Inner pipe 11 Insulation member
Claims (1)
造の過冷却水用熱交換器2であって、この過冷却水用熱
交換器2の出口近傍において、前記内管2b外周面に所
定長さの断熱部材11を装着したことを特徴とする過冷
却水用熱交換器の凍結防止構造。1. A heat exchanger 2 for supercooling water having a double pipe structure comprising an outer pipe 2a and an inner pipe 2b, wherein the inner pipe 2b is provided in the vicinity of the outlet of the heat exchanger 2 for supercooling water. An antifreezing structure for a heat exchanger for supercooled water, characterized in that a heat insulating member 11 having a predetermined length is attached to an outer peripheral surface.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30823995A JPH09126593A (en) | 1995-10-31 | 1995-10-31 | Antifreezing structure of heat exchanger for supercooling water |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30823995A JPH09126593A (en) | 1995-10-31 | 1995-10-31 | Antifreezing structure of heat exchanger for supercooling water |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH09126593A true JPH09126593A (en) | 1997-05-16 |
Family
ID=17978617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP30823995A Pending JPH09126593A (en) | 1995-10-31 | 1995-10-31 | Antifreezing structure of heat exchanger for supercooling water |
Country Status (1)
Country | Link |
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JP (1) | JPH09126593A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040011899A (en) * | 2002-07-31 | 2004-02-11 | 이건국 | Heat exchanger composed of calorific rubber |
JP2007007950A (en) * | 2005-06-29 | 2007-01-18 | Star Seiki Co Ltd | Mold temperature adjusting device |
US20090159248A1 (en) * | 2007-12-21 | 2009-06-25 | Mimitz Sr Timothy E | Heat exchanger, heat exchanger tube and methods of making and using same |
JP2015092122A (en) * | 2013-11-08 | 2015-05-14 | 三菱電機株式会社 | Heat exchanger |
CN110608557A (en) * | 2019-09-09 | 2019-12-24 | 浙江佛城制冷有限公司 | High-efficiency low-flow-resistance evaporator pipeline assembly and manufacturing method thereof |
-
1995
- 1995-10-31 JP JP30823995A patent/JPH09126593A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040011899A (en) * | 2002-07-31 | 2004-02-11 | 이건국 | Heat exchanger composed of calorific rubber |
JP2007007950A (en) * | 2005-06-29 | 2007-01-18 | Star Seiki Co Ltd | Mold temperature adjusting device |
US20090159248A1 (en) * | 2007-12-21 | 2009-06-25 | Mimitz Sr Timothy E | Heat exchanger, heat exchanger tube and methods of making and using same |
JP2015092122A (en) * | 2013-11-08 | 2015-05-14 | 三菱電機株式会社 | Heat exchanger |
CN110608557A (en) * | 2019-09-09 | 2019-12-24 | 浙江佛城制冷有限公司 | High-efficiency low-flow-resistance evaporator pipeline assembly and manufacturing method thereof |
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