JPH08617Y2 - Heat exchanger - Google Patents
Heat exchangerInfo
- Publication number
- JPH08617Y2 JPH08617Y2 JP7114790U JP7114790U JPH08617Y2 JP H08617 Y2 JPH08617 Y2 JP H08617Y2 JP 7114790 U JP7114790 U JP 7114790U JP 7114790 U JP7114790 U JP 7114790U JP H08617 Y2 JPH08617 Y2 JP H08617Y2
- Authority
- JP
- Japan
- Prior art keywords
- lid
- heat transfer
- transfer plate
- housing
- passage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は、例えば電子機器、装置等における筺体内温
度を制御するために用いて好適な熱交換器の改良に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of a heat exchanger suitable for use in controlling the temperature inside a housing of, for example, an electronic device or apparatus.
［従来の技術］ 従来、多数の電子部品やその実装用プリント基板群、
さらには電源等を内蔵してなる各種の電子機器、装置に
あっては、通電による発熱量が大きく、そのため筺体内
部が温度上昇すると、電子部品の性能が低下するため、
通常ファンによって筺体内に外気を導入し、筺体内部の
温まった空気を強制的に外部に排出して電子部品を空冷
し、その温度上昇を防止するようにしている。しかし、
このような方式では筺体内への塵埃等の侵入をフィルタ
等によって防止する必要があり、しかもその目詰まりに
より保守、点検作業を定期的に行わなければならず、ま
たその濾過性能面でも確実性に欠け、さらには湿度など
については全く無防備であると云う欠点があった。特
に、この種の電子機器、装置にあっては、電子部品の性
能を維持するため筺体内への塵埃や湿気等の侵入を極力
防止しなければならないものである。[Prior Art] Conventionally, a large number of electronic components and printed circuit boards for mounting the components,
Furthermore, in various electronic devices and devices that have a built-in power source, etc., the amount of heat generated by energization is large, so if the temperature inside the housing rises, the performance of the electronic components will decrease,
Usually, a fan is used to introduce outside air into the housing, and the warm air inside the housing is forcibly discharged to the outside to air-cool the electronic components and prevent the temperature rise. But,
In such a method, it is necessary to prevent dust and the like from entering the housing with a filter, etc., and maintenance and inspection work must be performed regularly due to clogging, and its filtration performance is also reliable. However, there was a defect that it was completely vulnerable to humidity and the like. In particular, in this type of electronic equipment and device, in order to maintain the performance of electronic components, it is necessary to prevent dust and moisture from entering the housing as much as possible.
このため、この種の電子機器、装置においては熱交換
器を設け、筺体内部を冷却するようにしたものが知られ
ている。第４図および第５図はこの種の熱交換器の従来
例を示すものであり、１は電子機器の筺体、２は筺体１
の内面に取り付けられた熱交換器で、この熱交換器２
は、ケーシング３と、ケーシング３の内部中央に配設さ
れた伝熱プレート４と、ケーシング３の前面下部に開設
された吸入口５と、ケーシング３の背面上部に開設され
た吸気口６に対応してケーシング３内にそれぞれ配設さ
れたファン7A、7B等で構成されている。Therefore, in this type of electronic equipment and device, a heat exchanger is provided to cool the inside of the housing. 4 and 5 show a conventional example of this type of heat exchanger, in which 1 is a housing of an electronic device and 2 is a housing 1.
The heat exchanger installed on the inner surface of the
Corresponds to the casing 3, the heat transfer plate 4 disposed in the center of the inside of the casing 3, the suction port 5 opened in the lower front portion of the casing 3, and the intake port 6 opened in the upper rear portion of the casing 3. Then, the casing 3 includes fans 7A, 7B, etc., respectively.
前記ケーシング３の内部で前記伝熱プレート４の上方
には前記吸気口６を介して機器筺体１の内部と連通する
上部空気室８が、伝熱プレート４の下方には前記吸入口
５を介して機器外部と連通する下部空気室９がそれぞれ
形成されている。Inside the casing 3, above the heat transfer plate 4, an upper air chamber 8 communicating with the inside of the device housing 1 via the intake port 6, and below the heat transfer plate 4 via the suction port 5. Lower air chambers 9 that communicate with the outside of the device.
前記伝熱プレート４は、アルミニウム等の金属板を表
面側と裏面側に交互に折り曲げて形成されるかもしくは
押出成形によって形成されることにより、筺体外部空気
H1と筺体内部空気H2をそれぞれ流通させる複数個の第
１、第２通路溝10、11を表裏面に外向き、内向きに交互
に形成してなる形状を呈している。第１、第２通路溝1
0、11は、断面形状が略横長コ字状とされる。伝熱プレ
ート４の前面上部と、後面下部には前記各第１、第２通
路溝10、11にそれぞれ連通する出口12、13が開設され、
さらに伝熱プレート４の表裏面には、前記第１、第２通
路溝10、11の表面側開口部と、裏面側開口部14、15をそ
れぞれ閉鎖するシール材16、17が密接固定されている。
各シール材16、17の前記開口12、13に対応する箇所には
略同一の大きさを有する開口28、19がそれぞれ開設さ
れ、さらにこれら開口18、19に対応して前記機器筺体１
の上部と、前記ケーシング３の背面下部にそれぞれ排気
孔20、21が形成されている。The heat transfer plate 4 is formed by alternately bending a front surface side and a back surface side of a metal plate such as aluminum, or by extrusion molding, so that the housing external air
It has a shape in which a plurality of first and second passage grooves 10 and 11 through which H 1 and air inside the housing H 2 respectively flow are alternately formed outward and inward on the front and back surfaces. First and second passage groove 1
The cross-sectional shapes of 0 and 11 are substantially horizontally long U-shaped. Outlets 12, 13 communicating with the first and second passage grooves 10, 11 are formed in the upper front portion and the lower rear portion of the heat transfer plate 4,
Further, sealing materials 16 and 17 for closing the front surface side opening portions of the first and second passage grooves 10 and 11 and the back surface side opening portions 14 and 15 are closely fixed to the front and back surfaces of the heat transfer plate 4, respectively. There is.
Openings 28 and 19 having substantially the same size are respectively formed at locations corresponding to the openings 12 and 13 of the respective sealing materials 16 and 17, and the device housing 1 corresponding to these openings 18 and 19, respectively.
And exhaust holes 20 and 21 are formed in the upper part of the casing and the lower part of the rear surface of the casing 3, respectively.
一方、伝熱プレート４の上、下面には、前記第１通路
溝10の上端開口部22と、第２通路溝11の下端開口部23を
気密に閉鎖する蓋部材24、25がそれぞれ設けられてい
る。蓋部材24、25は各第１、第２通路溝10、11の断面形
状と略同一の大きさを有する角棒状体に形成されて、第
１通路溝10の上端開口部22と、第２通路溝11の下端開口
部23にそれぞれ嵌合固定される。第１通路溝10は、下端
が開放して前記下部空気室９と連通し、第２通路溝11は
上端が開放して前記上部空気室８と連通している。On the other hand, upper and lower surfaces of the heat transfer plate 4 are provided with lid members 24 and 25 for hermetically closing the upper end opening 22 of the first passage groove 10 and the lower end opening 23 of the second passage groove 11, respectively. ing. The lid members 24 and 25 are formed in a rectangular rod shape having a size substantially the same as the cross-sectional shape of the first and second passage grooves 10 and 11, respectively. They are fitted and fixed in the lower end openings 23 of the passage grooves 11, respectively. The first passage groove 10 has an open lower end and communicates with the lower air chamber 9, and the second passage groove 11 has an open upper end and communicates with the upper air chamber 8.
このような構成において、ファン7A、7Bによって筺体
外部の冷たい空気H1と、筺体内部の温かい空気H2を下部
空気室９と上部空気室８内にそれぞれ導入すると、冷た
い空気H1は伝熱プレート４の第１通路10の下端開口部よ
り該通路溝内を通って排気口20から筺体外部へ排出さ
れ、温かい空気H2は伝熱プレート４の第２通路溝11の上
端開口部より該通路溝内を通って排気口21から筺体内部
へ排出され、これら間で熱交換を行わせ、筺体１内を冷
却するようにしている。In such a configuration, when the cool air H 1 outside the housing and the warm air H 2 inside the housing are introduced into the lower air chamber 9 and the upper air chamber 8 by the fans 7A and 7B, respectively, the cold air H 1 transfers heat. The warm air H 2 is discharged from the lower end opening of the first passage 10 of the plate 4 through the passage groove to the outside of the housing through the exhaust port 20, and the warm air H 2 is discharged from the upper end opening of the second passage groove 11 of the heat transfer plate 4. The gas is discharged from the exhaust port 21 into the inside of the casing through the passage groove, and heat is exchanged between them to cool the inside of the casing 1.
第６図および第７図は蓋部材の他の従来例を示す斜視
図および要部断面図である。この蓋部材26は、樹脂等に
よって伝熱プレート４の下端面の輪郭形状より若干大き
い板状体に形成されて、第１通路11の下端開口部27に対
応する部分に開設された開口28と、裏面側に突設され第
２通路11の下端開口部23内に嵌挿される蓋部28および裏
面周縁部と蓋部28の周囲に設けられ伝熱プレート４の下
端部が嵌合する嵌合溝29を有するもので、前記第１通路
溝10の下端開口部27を残して伝熱プレート４の下面全体
を覆うように形成されている。FIG. 6 and FIG. 7 are a perspective view and a sectional view of an essential part showing another conventional example of the lid member. The lid member 26 is formed of a resin or the like into a plate-like body slightly larger than the contour shape of the lower end surface of the heat transfer plate 4, and has an opening 28 formed at a portion corresponding to the lower end opening 27 of the first passage 11. A lid 28 projecting on the back surface side and fitted into the lower end opening 23 of the second passage 11 and a fitting fit with the lower edge portion of the heat transfer plate 4 provided around the back surface peripheral edge portion and the lid portion 28. It has a groove 29 and is formed so as to cover the entire lower surface of the heat transfer plate 4 while leaving the lower end opening 27 of the first passage groove 10.
なお、29は補強リブ、矢印は空気H1、H2の流れの方向
を示す。In addition, 29 is a reinforcing rib, and the arrows indicate the directions of flow of the air H 1 and H 2 .
［考案が解決しようとする課題］ しかしながら、このような従来の熱交換器２にあって
は、特に第５図に示した角棒状体からなる蓋部材24、25
によって第１、第２通路溝10、11の上端開口部22と下端
開口部23を閉鎖する場合、蓋部材24、25を一本、一本前
記開口部22、23内に嵌合して溶着、溶接等を行わなけれ
ばならず、そのため蓋部材24、25の取付作業が面倒で時
間がかかると云う問題があった。一方、第６図および第
７図に示した蓋部材26の場合は一度で取り付けることが
できると云う大きな利点を有する反面、開口部28と嵌合
溝29とを仕切る側壁部30の厚みによって下端開口部27の
断面積が小さくなるため、空気H1の供給量が減少し、熱
交換効率が低下すると云う問題があった。[Problems to be Solved by the Invention] However, in such a conventional heat exchanger 2, in particular, the lid members 24 and 25 made of the rectangular rod-shaped body shown in FIG.
When the upper end opening 22 and the lower end opening 23 of the first and second passage grooves 10, 11 are closed by one, one lid member 24, 25 is fitted into the opening portions 22, 23 and welded. However, welding and the like have to be performed, so that there is a problem that the work of attaching the lid members 24 and 25 is troublesome and time-consuming. On the other hand, in the case of the lid member 26 shown in FIGS. 6 and 7, it has a great advantage that it can be attached at once, but on the other hand, due to the thickness of the side wall portion 30 partitioning the opening 28 and the fitting groove 29, the lower end Since the cross-sectional area of the opening 27 is small, the supply amount of the air H 1 is reduced, and the heat exchange efficiency is reduced.
したがって、本考案は上記したような従来の問題点に
鑑みてなさたもので、その目的とするところは、蓋部材
の取付作業が簡単かつ容易で、しかも開口部断面積を小
さくすることがなく熱交換効率を良好に保持し得る熱交
換器を提供することにある。Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to easily and easily attach the lid member without reducing the opening cross-sectional area. It is to provide a heat exchanger capable of maintaining good heat exchange efficiency.
［課題を解決するための手段］ 本考案は上記目的を達成するために、筺体外部空気と
筺体内部空気をそれぞれ流通させる断面横長コ字状の第
１、第２通路溝を表裏面に交互に形成してなる伝熱プレ
ートと、この伝熱プレートの表裏面にそれぞれ接合固定
され前記各第１、第２通路溝のプレート表裏面側開口部
を閉鎖するシール材と、前記各第１、第２通路溝の両端
開口端部のうち互いに反対側開口端部をそれぞれ閉鎖す
る蓋部材とを備え、前記蓋部材は、通路溝の側端開口部
内にそれぞれ嵌合される複数個の蓋本体と、蓋本体の一
端を一連に連結する連結体とで略櫛歯状に形成されるも
のである。[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention alternately forms first and second passage grooves having laterally U-shaped cross-sections on the front and back sides, through which air outside the housing and air inside the housing are respectively circulated. The heat transfer plate formed, a sealing material that is fixedly joined to the front and back surfaces of the heat transfer plate to close the plate front and back surface side openings of the first and second passage grooves, and the first and second heat transfer plates. A lid member that closes opposite open end portions of both open end portions of the two passage grooves, and the lid member includes a plurality of lid main bodies that are fitted in the side end opening portions of the passage groove, respectively. , And a connecting body that connects one end of the lid main body in series, and is formed in a substantially comb-like shape.
［作用］ 本考案において、蓋部材は複数個の蓋本体と、蓋本体
を一連に連結する連結体とで櫛歯状に形成され、各蓋本
体が通路溝の側端開口部内に嵌合され、該開口部を閉鎖
する。[Operation] In the present invention, the lid member is formed in a comb shape by a plurality of lid bodies and a connecting body that connects the lid bodies in series, and each lid body is fitted in the side end opening of the passage groove. , Closing the opening.
［実施例］ 以下、本考案を図面に示す実施例に基づいて詳細に説
明する。[Embodiment] Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.
第１図は本考案に係る熱交換器の一実施例を示す一部
破断分解斜視図、第２図は蓋部材を伝熱プレートに取り
付けた状態を示す要部斜視図である。なお、図中第４図
〜第７図と同一構成部品のものに対しては同一符号を以
て示し、その説明を省略する。これらの図において、本
実施例は伝熱プレート４に設けられた第１通路溝10の上
端開口部22を閉鎖する蓋部材40を、角棒状体からなる複
数個の蓋本体40Aと、これらの蓋本体40Aの一端を一連に
連結する連結体40Bとで略櫛歯状に形成し、また第２通
路溝11の下端開口部23を閉鎖する蓋部材41を上記蓋部材
40と同様、角棒状体からなる複数個の蓋本体41Aと、こ
れらの蓋本体41Aの一端を一連に連結する連結体41Bとで
略櫛歯状に形成した点に特徴を有するものである。FIG. 1 is a partially cutaway exploded perspective view showing an embodiment of a heat exchanger according to the present invention, and FIG. 2 is a perspective view of essential parts showing a state in which a lid member is attached to a heat transfer plate. In the drawings, the same components as those in FIGS. 4 to 7 are designated by the same reference numerals, and the description thereof will be omitted. In these drawings, in this embodiment, a lid member 40 for closing the upper end opening 22 of the first passage groove 10 provided in the heat transfer plate 4 is provided with a plurality of lid main bodies 40A made of square rod-shaped members, and The lid member 41 is formed by forming one end of the lid body 40A into a substantially comb-tooth shape with a connecting body 40B that connects the lid body 40A in series, and that closes the lower end opening 23 of the second passage groove 11.
Similar to 40, it is characterized in that a plurality of lid main bodies 41A made of a rectangular rod-like body and a connecting body 41B connecting one end of these lid main bodies 41A in series are formed in a substantially comb-tooth shape.
蓋部材40は、各蓋本体40Aが第１通路溝10の上端開口
部22内に嵌合されて溶接、溶着等により固定されること
により、前記開口部22を気密に閉鎖し、連結体40Bが伝
熱プレート４の表面上端部に接合される。In the lid member 40, each lid body 40A is fitted into the upper end opening 22 of the first passage groove 10 and fixed by welding, welding, etc., so that the opening 22 is hermetically closed, and the connecting body 40B. Is joined to the upper end of the surface of the heat transfer plate 4.
蓋部材41は、各蓋本体41Aが第２通路溝11の上端開口
部23内に嵌合されて溶接、溶着等により固定されること
により、前記開口部23を気密に閉鎖し、連結体41Bが伝
熱プレート４の裏面下端部に接合される。In the lid member 41, each lid body 41A is fitted into the upper end opening 23 of the second passage groove 11 and fixed by welding, welding, etc., so that the opening 23 is airtightly closed, and the connecting body 41B. Is joined to the lower end of the back surface of the heat transfer plate 4.
その他の構成は第４図および第５図に示した従来例と
同様である。Other configurations are the same as those of the conventional example shown in FIGS. 4 and 5.
かくしてこのような構成からなる熱交換器にあって
は、それぞれ複数個からなる蓋本体40A、41Aを伝熱プレ
ート４の側端開口部22、23に一度に嵌合することができ
るため、蓋部材40、41の取付作業が簡単かつ容易で、迅
速に行うことができるものである。Thus, in the heat exchanger having such a configuration, the lid bodies 40A and 41A, each of which is composed of a plurality of pieces, can be fitted into the side end openings 22 and 23 of the heat transfer plate 4 at a time. The work of attaching the members 40 and 41 is simple and easy, and can be performed quickly.
なお、蓋本体40A、41Aの断面形状は種々変更が可能で
あり、例えば第３図に示すように略砲弾形の断面形状と
して開口部23（または22）に嵌合し、その頂部を外側に
突出させると、第１通路溝10の下端開口部27付近におけ
る空気H1の乱流を軽減することができる利点を有する。The cross-sectional shape of the lid bodies 40A and 41A can be variously changed. For example, as shown in FIG. 3, the lid main body 40A, 41A is fitted into the opening 23 (or 22) with a substantially bullet-shaped cross-sectional shape, and the top thereof is placed outside. The protrusion makes it possible to reduce the turbulent flow of the air H 1 in the vicinity of the lower end opening 27 of the first passage groove 10.
［考案の効果］ 以上説明したように本考案に係る熱交換器は、伝熱プ
レートの側端開口部を閉鎖する蓋部材を、複数の蓋本体
と、蓋本体の一端を一連に連結する連結体とで櫛歯状に
形成したので、蓋部材の伝熱プレートに対する取付作業
が簡単かつ容易で、しかも隣接する他の通路溝の開口面
積を減少させることがなく、熱伝導効率を良好に保持し
得るなど、その実用上の効果は非常に大である。[Advantages of the Invention] As described above, the heat exchanger according to the present invention includes a lid member that closes a side end opening of a heat transfer plate, and a plurality of lid bodies and one end of the lid body that are connected in series. Since it is formed in a comb shape with the body, the work of attaching the lid member to the heat transfer plate is simple and easy, and the opening area of other adjacent passage grooves is not reduced, and good heat transfer efficiency is maintained. That is, the practical effect is very large.
第１図は本考案に係る熱交換器の一実施例を示す一部破
断分解斜視図、第２図は蓋部材を伝熱プレートに取付け
た状態を示す要部斜視図、第３図は蓋部材の他の実施例
を示す断面図、第４図は従来の熱交換器の断面図、第５
図は同熱交換器の主要構成部品の分解斜視図、第６図は
蓋部材の他の従来例を示す斜視図、第７図は蓋部材を伝
熱プレートに取り付けた状態を示す断面図である。 １……機器筺体、２……熱交換器、３……ケーシング、
４……伝熱プレート、５……吸入口、６……吸気口、7
A、7B……ファン、10……第１通路溝、11……第２通
路、12、13……開口、14……表面側開口部、15……裏面
側開口部、16、17……シート材、18、19……開口、20、
21……排気口、22、23……側端開口部、24、25、26、4
0、41……蓋部材、40A、41A……蓋本体、40B、41B……
連結体。FIG. 1 is a partially broken exploded perspective view showing an embodiment of a heat exchanger according to the present invention, FIG. 2 is a perspective view of an essential part showing a state where a lid member is attached to a heat transfer plate, and FIG. 3 is a lid. Sectional drawing which shows the other Example of a member, FIG. 4 is sectional drawing of the conventional heat exchanger,
FIG. 6 is an exploded perspective view of main components of the heat exchanger, FIG. 6 is a perspective view showing another conventional lid member, and FIG. 7 is a sectional view showing a state where the lid member is attached to a heat transfer plate. is there. 1 ... Equipment housing, 2 ... Heat exchanger, 3 ... Casing,
4 ... Heat transfer plate, 5 ... Intake port, 6 ... Intake port, 7
A, 7B …… Fan, 10 …… First passage groove, 11 …… Second passage, 12,13 …… Opening, 14 …… Front side opening, 15 …… Back side opening, 16,17 …… Sheet material, 18, 19 ... Opening, 20,
21 …… Exhaust port, 22, 23 …… Side end opening, 24, 25, 26, 4
0, 41 …… Lid member, 40A, 41A …… Lid body, 40B, 41B ……
Connected body.
Claims (1)
通させる断面横長コ字状の第１、第２通路溝を表裏面に
交互に形成してなる伝熱プレートと、この伝熱プレート
の表裏面にそれぞれ接合固定され前記各第１、第２通路
溝のプレート表裏面側開口部を閉鎖するシール材と、前
記各第１、第２通路溝の両端開口端部のうち互いに反対
側開口端部をそれぞれ閉鎖する蓋部材とを備え、前記蓋
部材は、通路溝の側端開口部内にそれぞれ嵌合される複
数個の蓋本体と、蓋本体の一端を一連に連結する連結体
とで略櫛歯状に形成されていることを特徴とする熱交換
器。1. A heat transfer plate in which first and second passage grooves having a laterally long U-shaped cross-section are alternately formed on the front and back surfaces, respectively, for circulating the air outside the housing and the air inside the housing, and a surface of the heat transfer plate. A sealing material that is fixedly bonded to the back surface to close the plate front and back surface side openings of each of the first and second passage grooves, and opposite opening ends of both end opening ends of each of the first and second passage grooves. A lid member that closes each of the portions, and the lid member includes a plurality of lid bodies that are respectively fitted into the side end openings of the passage groove, and a connecting body that connects one end of the lid body in series. A heat exchanger characterized by being formed in a comb shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7114790U JPH08617Y2 (en) | 1990-07-05 | 1990-07-05 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7114790U JPH08617Y2 (en) | 1990-07-05 | 1990-07-05 | Heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0433887U JPH0433887U (en) | 1992-03-19 |
| JPH08617Y2 true JPH08617Y2 (en) | 1996-01-10 |
Family
ID=31607921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7114790U Expired - Lifetime JPH08617Y2 (en) | 1990-07-05 | 1990-07-05 | Heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08617Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012114456A1 (en) * | 2011-02-22 | 2012-08-30 | 株式会社日立製作所 | Two-stage absorption refrigerating machine and method for manufacturing same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005210088A (en) * | 2003-12-26 | 2005-08-04 | Showa Denko Kk | Cooling device in closed cabinet |
-
1990
- 1990-07-05 JP JP7114790U patent/JPH08617Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012114456A1 (en) * | 2011-02-22 | 2012-08-30 | 株式会社日立製作所 | Two-stage absorption refrigerating machine and method for manufacturing same |
| JP5489143B2 (en) * | 2011-02-22 | 2014-05-14 | 株式会社日立製作所 | Two-stage absorption refrigerator and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0433887U (en) | 1992-03-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |