JP2675205B2 - Boiling cooler - Google Patents
Boiling coolerInfo
- Publication number
- JP2675205B2 JP2675205B2 JP3181147A JP18114791A JP2675205B2 JP 2675205 B2 JP2675205 B2 JP 2675205B2 JP 3181147 A JP3181147 A JP 3181147A JP 18114791 A JP18114791 A JP 18114791A JP 2675205 B2 JP2675205 B2 JP 2675205B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- evaporator
- liquid
- boiling
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0266—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/06—Control arrangements therefor
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Description
【０００１】[0001]
【産業上の利用分野】請求項１及び請求項２の発明は、
例えば鉄道車両に搭載されるチョッパ装置のサイリスタ
素子などを冷却するための沸騰冷却装置に関するもので
ある。The invention of claims 1 and 2
For example, the present invention relates to a boiling cooling device for cooling a thyristor element of a chopper device mounted on a railway vehicle.
【０００２】[0002]
【従来の技術】図４は従来の非浸漬形の沸騰冷却装置の
一例（特願平２−２０６８２６号参照）を示す構成図で
ある。図において、１は冷却液２が入れられている共通
液溜、３は共通液溜１にそれぞれ第１及び第２のダクト
４，５を介して複数接続されている蒸発器としての冷却
フィンであり、この冷却フィン３の吸熱面３ａには、被
冷却体であるサイリスタ素子（図示せず）が固着されて
いる。また、第１のダクト４は、共通液溜１から冷却フ
ィン３に冷却液２を送るためのものであり、第２のダク
ト５は、冷却フィン３から共通液溜１に加熱された冷却
液２及びその蒸気２ａを送るためのものである。６は共
通液溜１の上部にヘッダ７を介して接続され、蒸気２ａ
を凝縮する凝縮器である。2. Description of the Related Art FIG. 4 is a block diagram showing an example of a conventional non-immersion type boiling cooling apparatus (see Japanese Patent Application No. 2-206826). In the figure, 1 is a common liquid reservoir containing a cooling liquid 2 and 3 is a cooling fin as an evaporator, which is connected to the common liquid reservoir 1 via a plurality of first and second ducts 4 and 5, respectively. There is a thyristor element (not shown), which is an object to be cooled, fixed to the heat absorption surface 3a of the cooling fin 3. The first duct 4 is for sending the cooling liquid 2 from the common liquid reservoir 1 to the cooling fins 3, and the second duct 5 is the cooling liquid heated from the cooling fins 3 to the common liquid reservoir 1. 2 and its steam 2a. 6 is connected to the upper part of the common liquid reservoir 1 via a header 7, and vapor 2a
Is a condenser that condenses the.
【０００３】次に、動作について説明する。サイリスタ
素子の熱を吸熱した吸熱面３ａからの熱により、冷却液
２が加熱され沸騰する。これにより、吸熱面３ａの表面
から蒸気２ａの気泡が発生する。この気泡の上昇によ
り、冷却液２に図の矢印に示すような対流が生じる。こ
のため、蒸気２ａの気泡は、冷却フィン３の上部から第
２のダクト５及び共通液溜１を通ってヘッダ７に移動す
る。従って、ヘッダ７内には、蒸気２ａが充満する。ヘ
ッダ７内の蒸気２ａは、凝縮器６へ移動し、この凝縮器
６で空冷されて凝縮液化される。この凝縮液、即ち冷却
液２は、重力により再び共通液溜１に戻り冷却を行う。Next, the operation will be described. The cooling liquid 2 is heated and boiled by the heat from the heat absorbing surface 3a that has absorbed the heat of the thyristor element. As a result, bubbles of the vapor 2a are generated from the surface of the heat absorbing surface 3a. Due to the rise of the bubbles, convection occurs in the cooling liquid 2 as shown by the arrow in the figure. Therefore, the bubbles of the steam 2 a move from the upper part of the cooling fin 3 to the header 7 through the second duct 5 and the common liquid reservoir 1. Therefore, the header 7 is filled with the steam 2a. The steam 2a in the header 7 moves to the condenser 6 and is air-cooled in the condenser 6 to be condensed and liquefied. The condensed liquid, that is, the cooling liquid 2 returns to the common liquid reservoir 1 again by gravity and is cooled.
【０００４】このような沸騰冷却装置の冷却液２として
は、純水やエチレングリコール水溶液が特に有効であ
る。また、冷却液２として純水やエチレングリコール水
溶液を使用した場合、冷却液２の動作温度は−２０℃〜
６０℃程度であるので、その蒸気圧は１５０ｍｍｈｇ以
下の低圧状態となる。Pure water or an aqueous solution of ethylene glycol is particularly effective as the cooling liquid 2 for such a boiling cooling device. When pure water or an aqueous solution of ethylene glycol is used as the cooling liquid 2, the operating temperature of the cooling liquid 2 is -20 ° C to
Since the temperature is about 60 ° C., the vapor pressure becomes a low pressure state of 150 mmhg or less.
【０００５】[0005]
【発明が解決しようとする課題】上記のように構成され
た従来の沸騰冷却装置においては、運転初期時に冷却液
２の温度が沸騰温度まで上昇するのに時間がかかるた
め、それまでの間は設計基準の温度より低い液温状態が
続くことなる。このため、運転初期時に良好な沸騰冷却
特性が得られるまでに時間がかかり、温度差による歪み
等の不具合が装置に生じるという問題点があった。特
に、冷却液２としてエチレングリコール水溶液を使用す
る場合、沸騰までに時間がかかると、十分に撹拌されな
いため、エチレングリコールの濃度分布が不均一とな
り、冷却特性が安定しないので、できるだけ速く沸騰冷
却モードに移行させる必要がある。In the conventional boiling cooling apparatus constructed as described above, it takes time for the temperature of the cooling liquid 2 to rise to the boiling temperature at the beginning of operation, and therefore, in the meantime. A liquid temperature lower than the design standard temperature will continue. For this reason, there is a problem that it takes time until a good boiling cooling characteristic is obtained in the initial stage of operation, and a defect such as distortion due to a temperature difference occurs in the device. In particular, when an aqueous solution of ethylene glycol is used as the cooling liquid 2, if it takes a long time to boil, it will not be sufficiently agitated, so that the concentration distribution of ethylene glycol will be non-uniform and the cooling characteristics will not be stable. Need to move to.
【０００６】請求項１及び請求項２の発明は、上記のよ
うな問題点を解決することを課題としてなされたもので
あり、運転初期時の冷却液の温度上昇速度を速くし、安
定した良好な沸騰冷却特性を短時間で得ることができる
沸騰冷却装置を得ることを目的とする。The inventions of claims 1 and 2 are intended to solve the above-mentioned problems, and increase the temperature rising rate of the cooling liquid at the initial stage of operation to be stable and good. An object of the present invention is to obtain a boiling cooling device that can obtain various boiling cooling characteristics in a short time.
【０００７】[0007]
【課題を解決するための手段】請求項１の発明に係る沸
騰冷却装置は、運転初期時に閉じ、かつ沸騰冷却運転時
に開く開閉弁を、蒸発器から凝縮器への冷却液の蒸気の
経路に設けたものである。In the boiling cooling apparatus according to the invention of claim 1, an opening / closing valve which is closed at the beginning of operation and opened at the time of boiling cooling operation is provided in the path of the vapor of the cooling liquid from the evaporator to the condenser. It is provided.
【０００８】請求項２の発明に係る沸騰冷却装置は、運
転初期時に閉じ、かつ沸騰冷却運転時に開く形状記憶合
金製の開閉弁を、蒸発器から凝縮器への冷却液の蒸気の
経路に設けたものである。In the boiling cooling apparatus according to the second aspect of the present invention, an opening / closing valve made of a shape memory alloy which is closed at the beginning of operation and opened at the time of boiling cooling operation is provided in the path of the vapor of the cooling liquid from the evaporator to the condenser. It is a thing.
【０００９】[0009]
【作用】請求項１の発明においては、蒸発器から凝縮器
への蒸気の経路を、運転初期時に閉じることにより、運
転初期時の冷却液の温度上昇を速め、沸騰冷却運転に速
く移行させる。According to the first aspect of the invention, by closing the vapor path from the evaporator to the condenser at the beginning of the operation, the temperature rise of the cooling liquid at the beginning of the operation is accelerated, and the boiling cooling operation is quickly changed.
【００１０】請求項２の発明においては、蒸発器から凝
縮器への蒸気の経路を、運転初期時に閉じることによ
り、運転初期時の冷却液の温度上昇を速め、沸騰冷却運
転に速く移行させ、また形状記憶合金製の開閉弁を使用
することにより、構造を簡単にする。According to the second aspect of the present invention, the vapor path from the evaporator to the condenser is closed at the beginning of the operation to accelerate the temperature rise of the cooling liquid at the beginning of the operation and to quickly shift to the boiling cooling operation. Further, the structure is simplified by using the on-off valve made of shape memory alloy.
【００１１】[0011]
【実施例】以下、請求項１及び請求項２の発明の実施例
を図について説明する。図１は請求項１及び請求項２の
発明の一実施例による非浸漬形の沸騰冷却装置の運転初
期時の状態を示す構成図、図２は図１の装置の沸騰冷却
運転時の状態を示す構成図であり、図４と同一又は相当
部分には同一符号を付し、その説明を省略する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; FIG. 1 is a block diagram showing a state at the initial operation of a non-immersion type boiling cooling apparatus according to an embodiment of the invention of claims 1 and 2, and FIG. 2 shows a state of the apparatus of FIG. 1 during boiling cooling operation. 4 is a configuration diagram shown, and the same or corresponding portions as those in FIG.
【００１２】図において、11はヘッダ７の下端部の内壁
面に設けられた固定台、12は固定台11に対向している当
接台、13は基端部が固定台11に固定されている開閉弁
（止め弁）であり、この開閉弁13は、先端部が当接台12
に当接（密着）してヘッダ７の下部を閉鎖している。ま
た、開閉弁13は、形状記憶合金からなっており、沸騰冷
却運転時の冷却液２の温度、例えば６０℃になると図２
のように屈曲して、ヘッダ７の下部を開放するようにな
っている。In the figure, 11 is a fixed base provided on the inner wall surface of the lower end of the header 7, 12 is a contact base facing the fixed base 11, and 13 is a base end fixed to the fixed base 11. It is an on-off valve (stop valve) that is open.
And the lower part of the header 7 is closed. Further, the on-off valve 13 is made of a shape memory alloy, and when the temperature of the cooling liquid 2 during the boiling cooling operation reaches, for example, 60 ° C.
The lower part of the header 7 is opened by bending as shown in FIG.
【００１３】上記のような沸騰冷却装置においては、装
置の始動時、図１に示すように開閉弁13によりヘッダ７
の下部が閉鎖されている。この状態で、吸熱面３ａから
伝達される熱によって冷却液２が加熱される。運転初期
には、冷却液２は、対流のみによって撹拌され温度上昇
する。このとき、開閉弁13によって、共通液溜１から凝
縮器６への蒸気２ａの経路であるヘッダ７の途中が閉鎖
されているため、冷却液２の界面からの蒸発が防止さ
れ、液温の上昇が従来例よりも速くなる。In the boiling cooling apparatus as described above, when the apparatus is started, the header 7 is opened by the opening / closing valve 13 as shown in FIG.
The lower part of is closed. In this state, the cooling liquid 2 is heated by the heat transferred from the heat absorbing surface 3a. At the initial stage of operation, the cooling liquid 2 is stirred only by convection and its temperature rises. At this time, the opening / closing valve 13 closes the header 7 which is the path of the steam 2a from the common liquid reservoir 1 to the condenser 6, so that the evaporation of the cooling liquid 2 from the interface is prevented and the liquid temperature is kept constant. It rises faster than the conventional example.
【００１４】この後、液温が上昇して、冷却液２が沸騰
し始めると、蒸気２ａの気泡が発生して、液全体が激し
く撹拌される。これにより、液温がさらに上昇して沸騰
冷却運転温度（ここでは６０℃）になると、開閉弁13が
図２に示すように変形して開放状態になる。この状態で
は、従来例と同様に冷却が行われる。なお、液温が６０
℃より低くなると、開閉弁13は自動的に再度閉鎖状態に
なる。After this, when the liquid temperature rises and the cooling liquid 2 begins to boil, bubbles of the steam 2a are generated and the entire liquid is vigorously stirred. As a result, when the liquid temperature further rises and reaches the boiling cooling operation temperature (here, 60 ° C.), the opening / closing valve 13 is deformed as shown in FIG. In this state, cooling is performed as in the conventional example. The liquid temperature is 60
When the temperature becomes lower than ℃, the on-off valve 13 is automatically closed again.
【００１５】このように、上記実施例の沸騰冷却装置で
は、運転初期時の液温上昇が従来より速いため、安定し
た良好な沸騰冷却特性が短時間で得られる。ここで、図
３は液温４０℃と液温６０℃の場合の沸騰曲線を示す過
熱度と熱流束との関係図である。この図に示すように、
沸騰冷却特性は、液温が高い方が良好である。As described above, in the boiling cooling apparatus of the above-mentioned embodiment, the liquid temperature rise at the initial stage of operation is faster than in the conventional case, so that stable and good boiling cooling characteristics can be obtained in a short time. Here, FIG. 3 is a relationship diagram between a superheat degree and a heat flux, which shows a boiling curve when the liquid temperature is 40 ° C. and the liquid temperature is 60 ° C. As shown in this figure,
The boiling cooling characteristics are better when the liquid temperature is higher.
【００１６】なお、上記実施例では温度に応じて変形す
る形状記憶合金製の開閉弁13を示したが、例えば蒸発器
内の温度センサからの信号により電気的に開閉される開
閉弁などであってもよい。また、上記実施例では非浸漬
形の沸騰冷却装置を示したが、浸漬形のものであっても
よい。さらに、被冷却体もサイリスタ素子に限定される
ものではない。さらにまた、冷却液２はエチレングリコ
ール水溶液に限定されるものではなく、また開閉弁13の
開閉温度は冷却液２に応じて決めればよい。Although the opening / closing valve 13 made of a shape memory alloy that deforms according to the temperature is shown in the above embodiment, it is an opening / closing valve which is electrically opened / closed by a signal from a temperature sensor in the evaporator. May be. Further, although the non-immersion type boil cooling apparatus is shown in the above embodiment, the immersion type may be used. Furthermore, the object to be cooled is not limited to the thyristor element. Furthermore, the cooling liquid 2 is not limited to the ethylene glycol aqueous solution, and the opening / closing temperature of the opening / closing valve 13 may be determined according to the cooling liquid 2.
【００１７】[0017]
【発明の効果】以上説明したように、請求項１の発明の
沸騰冷却装置は、運転初期時に閉じ、かつ沸騰冷却運転
時に開く開閉弁を、蒸発器から凝縮器への冷却液の蒸気
の経路に設けたので、運転初期時の冷却液の温度上昇速
度を速くし、安定した良好な沸騰冷却特性を短時間で得
ることができるという効果を奏する。As described above, in the boiling cooling apparatus according to the first aspect of the invention, the opening / closing valve which is closed at the beginning of operation and opened at the time of boiling cooling operation is provided for the passage of the vapor of the cooling liquid from the evaporator to the condenser. Since the temperature is increased in the initial stage of the operation, it is possible to obtain stable and good boiling cooling characteristics in a short time.
【００１８】また、請求項２の発明の沸騰冷却装置は、
運転初期時に閉じ、かつ沸騰冷却運転時に冷却液の温度
により変形して開く開閉弁を、蒸発器から凝縮器への冷
却液の蒸気の経路に設けたので、上記請求項１の発明の
効果に加えて、簡単で安価な構造で、より確実に蒸気の
経路を開閉できるという効果を奏する。The boiling cooling device according to the invention of claim 2 is
Since the opening / closing valve that is closed at the beginning of operation and that is deformed and opened by the temperature of the cooling liquid during the boiling cooling operation is provided in the path of the vapor of the cooling liquid from the evaporator to the condenser, the effect of the invention of claim 1 is achieved. In addition, the structure is simple and inexpensive, and the steam path can be opened and closed more reliably.
【図１】請求項１及び請求項２の発明の一実施例による
沸騰冷却装置の運転初期時の状態を示す構成図である。FIG. 1 is a configuration diagram showing a state at an initial stage of operation of a boiling cooling apparatus according to an embodiment of the inventions of claims 1 and 2. FIG.
【図２】図２は図１の装置の沸騰冷却運転時の状態を示
す構成図である。FIG. 2 is a configuration diagram showing a state of the apparatus of FIG. 1 during a boiling cooling operation.
【図３】図１の装置における液温４０℃と液温６０℃の
場合の沸騰曲線を示す過熱度と熱流束との関係図であ
る。FIG. 3 is a relationship diagram between a superheat degree and a heat flux showing a boiling curve when the liquid temperature is 40 ° C. and the liquid temperature is 60 ° C. in the apparatus of FIG.
【図４】従来の非浸漬形の沸騰冷却装置の一例を示す構
成図である。FIG. 4 is a configuration diagram showing an example of a conventional non-immersion type boiling cooling device.
２ 冷却液 ２ａ 蒸気 ３ 冷却フィン（蒸発器） ６ 凝縮器 ７ ヘッダ（経路） 13 開閉弁 2 Coolant 2a Steam 3 Cooling fin (evaporator) 6 Condenser 7 Header (path) 13 Open / close valve
Claims (2)
している蒸発器と、この蒸発器に接続され、前記蒸発器
で蒸発した前記冷却液の蒸気を凝縮する凝縮器と、前記
蒸発器から前記凝縮器への前記蒸気の経路に設けられ、
運転初期時に前記経路を閉じ、かつ沸騰冷却運転時に前
記経路を開く開閉弁とを備えていることを特徴とする沸
騰冷却装置。1. An evaporator containing a cooling liquid for cooling an object to be cooled; a condenser connected to the evaporator for condensing vapor of the cooling liquid evaporated in the evaporator; Provided in the path of the vapor from the evaporator to the condenser,
A boiling cooling device, comprising: an opening / closing valve that closes the path at the beginning of operation and opens the path at the time of boiling cooling operation.
している蒸発器と、この蒸発器に接続され、前記蒸発器
で蒸発した前記冷却液の蒸気を凝縮する凝縮器と、前記
蒸発器から前記凝縮器への前記蒸気の経路に設けられ、
前記冷却液の温度により変形することによって、運転初
期時に前記経路を閉じ、かつ沸騰冷却運転時に前記経路
を開く形状記憶合金製の開閉弁とを備えていることを特
徴とする沸騰冷却装置。2. An evaporator containing a cooling liquid for cooling an object to be cooled; a condenser connected to the evaporator for condensing vapor of the cooling liquid evaporated in the evaporator; Provided in the path of the vapor from the evaporator to the condenser,
An on-off valve made of a shape memory alloy, which is deformed according to the temperature of the cooling liquid to close the path at the beginning of operation and open the path at the time of boiling cooling operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3181147A JP2675205B2 (en) | 1991-07-22 | 1991-07-22 | Boiling cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3181147A JP2675205B2 (en) | 1991-07-22 | 1991-07-22 | Boiling cooler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0529511A JPH0529511A (en) | 1993-02-05 |
| JP2675205B2 true JP2675205B2 (en) | 1997-11-12 |
Family
ID=16095711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3181147A Expired - Lifetime JP2675205B2 (en) | 1991-07-22 | 1991-07-22 | Boiling cooler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2675205B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6357517B1 (en) | 1994-07-04 | 2002-03-19 | Denso Corporation | Cooling apparatus boiling and condensing refrigerant |
| JP6733246B2 (en) * | 2016-03-22 | 2020-07-29 | 日本電気株式会社 | Electronic component cooling device and electronic component provided with cooling device |
-
1991
- 1991-07-22 JP JP3181147A patent/JP2675205B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0529511A (en) | 1993-02-05 |
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