JPH0719111A - Heater for external combustion engine - Google Patents

Abstract

PURPOSE:To improve engine efficiency by laminating a plurality of processed plates, connecting them to each other for forming flow passages for operation gas and combustion gas, thereby forming unevenness on a heat conduction surface, and promoting head conduction. CONSTITUTION:An uneven outer peripheral surface 16 of a heater 14 is prepared by laminating a plurality of circular plates 21 subjected to punching process and connecting them through brazing process. Holes 23 wholly compose a pipe- like flow passage. The flow passage serves as a flow passage A for operation gas. After connection, an inner peripheral surface 15 is cut, so that only unevenness on the outer peripheral surface 16 remains. A space between connection bodies 24, divided into a plurality of spaces, serves as a flow passage B for combustion gas. Heat exchange is performed between the combustion gas flowing through the passage B and operation gas flowing through the passage A. The pipe-like flow passage A has thus a remarkably large outer peripheral area, which passage A is formed by processed holes for the operation gas. A combustion conduction area is enlarged and conduction performance is particularly improved.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は冷暖房、給湯、動力など
に用いる外燃機関の加熱器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heater for an external combustion engine used for cooling and heating, hot water supply, power, etc.

【０００２】[0002]

【従来の技術】従来のＶＭ（ブルマイヤ）サイクル駆動
方式の外燃機関の部分断面図を図７に示す。図７におい
て、作動ガスが封入されたシリンダ１は高温側ディスプ
レーサであるピストン２によって圧縮室３と膨張室（図
示せず）に区画され、この圧縮室３と膨張室との間に加
熱器４、再生器５、冷却器６が設置されている。このピ
ストン２が図で上方へ動くと作動ガスは圧縮されて加熱
器４、再生器５、冷却器６、膨張室を経て図示しない中
間熱交換器へ送られるが、この間に冷却器６から温水配
管を経て室外側熱交換器（図示せず）で放熱されて戻る
ようになっている。一方加熱源（バーナーなど）７の燃
料ガスは空気予熱器８で予熱され、且つ旋回気流発生器
９で旋回された空気と混合され、燃焼室で燃焼する。そ
して、燃焼ガスは、環状に配置された多数の加熱管１１
から成る加熱器４の間を通って加熱管１１内の作動ガス
を加熱し、排ガスとして出て行く。2. Description of the Related Art FIG. 7 shows a partial cross-sectional view of a conventional VM (Burmeier) cycle drive type external combustion engine. In FIG. 7, a cylinder 1 in which a working gas is filled is partitioned into a compression chamber 3 and an expansion chamber (not shown) by a piston 2 which is a high temperature side displacer, and a heater 4 is provided between the compression chamber 3 and the expansion chamber. , A regenerator 5, and a cooler 6 are installed. When the piston 2 moves upward in the figure, the working gas is compressed and sent to the intermediate heat exchanger (not shown) via the heater 4, the regenerator 5, the cooler 6 and the expansion chamber. The heat is radiated by an outdoor heat exchanger (not shown) through the piping and returns. On the other hand, the fuel gas of the heating source (burner or the like) 7 is preheated by the air preheater 8 and mixed with the air swirled by the swirling airflow generator 9, and burned in the combustion chamber. Then, the combustion gas is generated by a large number of heating pipes 11 arranged in an annular shape.
The working gas in the heating pipe 11 is heated through the space between the heaters 4 and is discharged as exhaust gas.

【０００３】[0003]

【発明が解決しようとする課題】図７に示す従来の加熱
管１１は高温に曝されるため高価な耐熱合金製で曲げ加
工が困難であり、管外側の熱伝達が悪く、又、管内側も
伝熱性能を向上させるためにフィン等を取り付ける必要
があるが、その加工取付は容易でなく、更に加熱管は配
列上複雑な曲げが要求され、燃焼ガスの流路となる加熱
管の間のギャップ調整も困難である。Since the conventional heating pipe 11 shown in FIG. 7 is exposed to a high temperature, it is made of an expensive heat-resistant alloy and difficult to bend, the heat transfer on the outside of the pipe is poor, and the inside of the pipe is poor. In order to improve heat transfer performance, it is necessary to attach fins, etc., but it is not easy to process and attach, and the heating pipes require complicated bending due to the arrangement, and between the heating pipes that will be the flow path of the combustion gas It is also difficult to adjust the gap.

【０００４】[0004]

【課題を解決するための手段】本発明による加熱器は、
（１）外周面に凹凸が形成され、穴加工が施された複数
枚の環状板を積層してロー付け等により接合し、前記穴
が全体として管状の流路を形成し、この流路を隣接同士
Ｕベント管で連結して作動ガスの流路Ａとし、接合後内
周面を切り取ることにより外周面の凹凸だけが残り、複
数個に分割された接合体の間を燃焼ガスの流路Ｂとし、
（２）内周面に凹凸が形成され、（１）項と同様にし
て、接合後外周面を切り取ることにより（１）項と同じ
構造体を得る、（３）外周面又は内周面のどちらかに凹
凸が形成され、穴加工が施された複数枚の環状板と、外
周面及び内周面のどちらにも凹凸がなく、前記環状板の
巾より小さい巾を有して穴加工された複数枚の環状板と
を交互に積層するか、或は、外周面に凹凸が形成され、
穴加工されて外周面の直径が少し小さい複数枚の環状板
と、内周面に凹凸が形成され、穴加工されて内周面の直
径が少し大きい複数枚の環状板とを交互に積層してロー
付け等により接合後、半径方向に切断して複数個の弧状
のブロック接合体を形成する、以上（１）〜（３）の構
造にして上記の課題を解決した。A heater according to the present invention comprises:
(1) A plurality of annular plates, each having an irregular surface formed on the outer peripheral surface and having holes formed therein, are stacked and joined by brazing or the like, and the holes form a tubular flow path as a whole. Adjacent U vent pipes are connected to each other to form a working gas flow path A. After joining, the inner peripheral surface is cut off to leave only irregularities on the outer peripheral surface, and a combustion gas flow path is formed between the joined bodies. B,
(2) Concavities and convexities are formed on the inner peripheral surface, and the same outer structure as in (1) is obtained by cutting the outer peripheral surface after joining in the same manner as in (1). (3) Outer surface or inner surface A plurality of annular plates that have irregularities formed in one of them and have been drilled, and there are no irregularities on either the outer peripheral surface or the inner peripheral surface, and the holes are drilled with a width smaller than the width of the annular plate. Alternately laminated with a plurality of annular plates, or irregularities are formed on the outer peripheral surface,
A plurality of annular plates that have been drilled and have a slightly smaller outer diameter, and a plurality of annular plates that have been drilled and have a slightly larger inner diameter have been laminated alternately. The above problems are solved by the above-described structures (1) to (3) in which a plurality of arc-shaped block joined bodies are formed by cutting the pieces in a radial direction after joining by brazing or the like.

【０００５】[0005]

【作用】加工穴によって形成された作動ガスの管状の流
路Ａの外周面積は極めて大きくなり、従って燃焼ガスか
ら作動ガスへの燃焼伝達面積が大きくなって伝熱性能が
格段に向上する。The outer peripheral area of the tubular passage A of the working gas formed by the processed hole becomes extremely large, and therefore the combustion transfer area from the combustion gas to the working gas becomes large, and the heat transfer performance is remarkably improved.

【０００６】[0006]

【実施例】本発明を適用した第１実施例の加熱器１４を
取り付けた外燃機関の部分断面図を図１に示す。図１に
おいて図７と同じ部品は同じ符号を付し、異なる点のみ
を説明する。加熱器１４の内周面１５を切り取る前の展
開斜視図を図２（Ａ）に、内周面を切り取った後の斜視
図を図２（Ｂ）に示すが、鉄板製の環状板２１の外周面
１６にはプレス加工又はエッチング等により放射状に切
込み２２が、又切込みと切込みのほぼ中間に穴２３が形
成される。この環状板２１を切込み２２及び穴２３が一
致するように積み重ね、ロー付け等で接合した後、内周
面１５を切り取ると、図２（Ｂ）に示すように複数個の
接合体２４が得られる。この接合体２４の隣接同士を図
１に示すようにＵベント管２５で接合し（この際、最上
部の環状板の穴２３′は大きくしておく）、シリンダ１
の垂直穴１ａ及び斜行穴１ｂと穴２３が合致するように
して接合体２４を環状にシリンダ１にロー付け等で固定
する。穴２３で形成されるのが流路Ａで、切込み２２で
形成されるのが流路Ｂである。1 is a partial sectional view of an external combustion engine equipped with a heater 14 of the first embodiment to which the present invention is applied. In FIG. 1, the same parts as those in FIG. 7 are designated by the same reference numerals, and only different points will be described. FIG. 2 (A) shows a developed perspective view before cutting the inner peripheral surface 15 of the heater 14, and FIG. 2 (B) shows a perspective view after cutting the inner peripheral surface. Radial cuts 22 are formed in the outer peripheral surface 16 by press working or etching, and holes 23 are formed substantially in the middle of the cuts. The annular plates 21 are stacked so that the notches 22 and the holes 23 are aligned, joined by brazing, etc., and then the inner peripheral surface 15 is cut off to obtain a plurality of joined bodies 24 as shown in FIG. 2 (B). To be Adjacent parts of the joined body 24 are joined together by a U-vent pipe 25 as shown in FIG. 1 (at this time, the hole 23 'of the uppermost annular plate is made large), and the cylinder 1
The joined body 24 is fixed to the cylinder 1 in an annular shape by brazing or the like so that the vertical hole 1a and the oblique hole 1b and the hole 23 are aligned with each other. The flow path A is formed by the hole 23, and the flow path B is formed by the cut 22.

【０００７】次に、この加熱器１４の作用について説明
する。図７の場合と同様にして作動ガスはシリンダ１の
穴１ｂから穴２３で形成された流路Ａ、Ｕベント管２
５、隣接の流路Ａ、シリンダの穴１ａ、再生器５へと流
れる。一方燃焼ガスは空間１０から切込み２２で形成さ
れた流路Ｂを通って排出され、この間に加熱器１４を介
して作動ガスを加熱する。Next, the operation of the heater 14 will be described. As in the case of FIG. 7, the working gas is flowed through the holes 1b to 23 of the cylinder 1 through the flow paths A and U vent pipes 2
5, the adjacent flow path A, the hole 1a of the cylinder, and the regenerator 5. On the other hand, the combustion gas is discharged from the space 10 through the flow path B formed by the notch 22, and the working gas is heated via the heater 14 during this time.

【０００８】図３は第２実施例の環状板３１の斜視図
で、切込み３２が内周面１５ａに設けられていること
と、積み重ねてロー付け等で接合した後に外周面１６ａ
を切り取ること以外は第１実施例と同じで、完成した接
合体は図２（Ｂ）と全く同じになる。FIG. 3 is a perspective view of the annular plate 31 of the second embodiment, in which the notch 32 is provided in the inner peripheral surface 15a, and the outer peripheral surface 16a after being stacked and joined by brazing or the like.
The procedure is the same as that of the first embodiment except that the cutout is cut out, and the completed joined body is exactly the same as that shown in FIG.

【０００９】図４（Ａ），図４（Ｂ）はそれぞれ第３，
第４実施例の加熱器３４，４４の展開斜視図を示す。第
３、第４実施例のものはいずれも外周や内周を切り離さ
なくてもよい例である。図４（Ａ）の加熱器３４を構成
するブロック接合体３４ａは、図２（Ａ）に示す環状板
２１と、環状板２１と同様に穴加工されて巾が環状板２
１の巾より小さく切込みのない環状板４１とを穴２３を
合致させて交互に積み重ねてロー付け等で接合した後
に、半径方向に複数箇処で切断して形成される。最上部
の環状板の穴２３′を大きくしてＵベント管２５で連結
するのは図１の場合と同様である。尚前記の半径方向に
切断する代りに、環状板２１，４１を予め弧状に分割し
たものからブロック接合体３４ａを形成してもよい。図
４（Ｂ）の加熱器４４を構成するブロック接合体４４ａ
は、環状板２１と同様に穴加工されて外周面１６ｃに切
込み５２が設けられ外周面１６ａの直径が少し小さい環
状板５１と、同じく穴加工されて内周面１５ｂに切込み
６２が設けられ内周面１５ｂの直径が少し大きい環状板
６１とを穴２３を合致させて交互に積み重ねてロー付け
等で接合した後に、半径方向に複数箇処で切断して形成
される。環状板５１，６１を予め分割してブロック接合
体４４ａを形成できることは図４（Ａ）の第３実施例と
同様である。FIGS. 4 (A) and 4 (B) show the third and third parts, respectively.
The development perspective view of the heaters 34 and 44 of 4th Example is shown. The third and fourth embodiments are examples in which the outer circumference and the inner circumference do not have to be separated. The block assembly 34a that constitutes the heater 34 of FIG. 4A has the annular plate 21 shown in FIG.
An annular plate 41 having a width less than 1 and having no notch and having holes 23 aligned with each other are alternately stacked and joined by brazing or the like, and then cut at a plurality of positions in the radial direction. It is the same as in the case of FIG. 1 that the hole 23 ′ of the uppermost annular plate is enlarged and connected by the U vent pipe 25. Instead of cutting in the radial direction described above, the block bonded body 34a may be formed by previously dividing the annular plates 21 and 41 into arc shapes. Block bonded body 44a that constitutes the heater 44 of FIG.
Similarly to the annular plate 21, a hole 52 is formed in the outer peripheral surface 16c and a notch 52 is formed in the outer peripheral surface 16c, and an outer peripheral surface 16a is slightly smaller in diameter, and a hole 62 is formed in the inner peripheral surface 15b. The circular plate 61 having a slightly larger diameter on the peripheral surface 15b is formed by alternately stacking the holes 23 in conformity with each other and joining them by brazing or the like, and then cutting them in plural portions in the radial direction. Similar to the third embodiment shown in FIG. 4A, the ring-shaped plates 51 and 61 can be divided in advance to form the block bonded body 44a.

【００１０】上述の第３，第４実施例の作用としては、
燃焼ガスは図４（Ａ），（Ｂ）に示すようにそれぞれの
環状板の切込みと、ブロック接合体同士の隙間Ｃとを流
れるが、隙間Ｃは弧状に切断された環状板の加熱による
ひずみを逃がす役目も果たす。The operation of the third and fourth embodiments described above is as follows.
As shown in FIGS. 4 (A) and 4 (B), the combustion gas flows through the notches in the respective annular plates and the gap C between the block joined bodies, but the gap C is strained by the heating of the annular plate cut in an arc shape. Also plays the role of escape.

【００１１】尚、図５は第５実施例の加熱器の展開斜視
図、図６（Ａ）は第６実施例の加熱器を取り付けた外燃
機関の部分断面図、図６（Ｂ）は第６実施例の加熱器の
部分拡大正面図である。第５実施例のものは、図５に示
されるように、燃焼ガス流路用の溝８１及び作動ガス流
路用の穴８２の溝巾、穴径を変えてフィンを形成したも
ので、積層接合後外周（内周の場合も考えられる）を切
り離す。第６実施例のものは、図６に示されるように、
加工穴の直径を大小２種にして交互に積み重ねたもの
で、作動ガスの管状流路の表面積が大きくなる。即ち、
図５及び図６に示される第５実施例及び第６実施例の加
熱器は、 数枚おきに凹凸の大きさや形状を変化させ、燃焼ガス
流路にフィンを形成させ、又、燃焼ガス流れを均一化す
るためフィン間隔を変化させることもでき、 又、数枚おきに作動ガス流路になる穴の大きさを変化
させたり、穴に凹凸を加工するなどして形状を変化させ
ることにより、作動ガス流路にフィンを形成させたるこ
ともでき、 又、板を数枚おきにずらして積層することにより燃焼
ガス流路、作動ガス流路を変化させ、フィンを形成させ
ることもできるようにしたものである。又、直線形切込
みを曲線形切込みに変えると燃焼ガスの接触表面積が大
きくなり、伝熱性能が更に向上される。又、Ｕベント管
の代りに穴加工した板を積層してもよい。5 is a developed perspective view of the heater of the fifth embodiment, FIG. 6 (A) is a partial sectional view of an external combustion engine equipped with the heater of the sixth embodiment, and FIG. 6 (B) is It is a partially expanded front view of the heater of 6th Example. In the fifth embodiment, as shown in FIG. 5, fins are formed by changing the groove width and hole diameter of the combustion gas passage groove 81 and the working gas passage hole 82. After joining, separate the outer circumference (which may be the inner circumference). In the sixth embodiment, as shown in FIG.
The diameters of the processed holes are two kinds, large and small, and are alternately stacked, and the surface area of the tubular passage of the working gas becomes large. That is,
The heaters of the fifth embodiment and the sixth embodiment shown in FIGS. 5 and 6 change the size and shape of the unevenness every few sheets to form fins in the combustion gas flow path, and the combustion gas flow. The fin spacing can be changed to make the holes uniform, and by changing the size of the holes that become the working gas passages every few sheets, or by changing the shape by processing irregularities in the holes. It is also possible to form fins in the working gas flow path, or to form fins by changing the combustion gas flow path and the working gas flow path by stacking several plates at intervals. It is the one. Further, when the linear cut is changed to the curved cut, the contact surface area of the combustion gas is increased and the heat transfer performance is further improved. Further, instead of the U-vent pipe, a plate having holes may be laminated.

【００１２】[0012]

【発明の効果】本発明による外燃機関の加熱器は、上述
のように構成されているので、下記の効果がある。 複数枚の板を積層するため伝熱面は凹凸ができ、伝熱
促進となり、機関効率が向上する。 積層する板の形状を変化させることにより、容易に伝
熱面にフィンを形成することができ、更に伝熱促進が期
待され、機関効率が向上する。 燃焼ガス流路となる隙間は、チューブ方式に比べると
容易に調節できる。 又、低コストの鉄板が使用できる。Since the heater of the external combustion engine according to the present invention is constructed as described above, it has the following effects. Since a plurality of plates are laminated, the heat transfer surface has irregularities, which promotes heat transfer and improves engine efficiency. By changing the shape of the plates to be laminated, fins can be easily formed on the heat transfer surface, further promotion of heat transfer is expected, and engine efficiency is improved. The gap serving as the combustion gas passage can be adjusted more easily than in the tube system. Also, a low cost iron plate can be used.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明による加熱器の第１実施例を取り付けた
外燃機関の部分断面図である。FIG. 1 is a partial cross-sectional view of an external combustion engine equipped with a first embodiment of a heater according to the present invention.

【図２】（Ａ）は図１に示す加熱器の内周面を切り取る
前の展開斜視図、（Ｂ）は内周面を切り取った後の斜視
図である。FIG. 2A is a developed perspective view of the heater shown in FIG. 1 before cutting the inner peripheral surface, and FIG. 2B is a perspective view after cutting the inner peripheral surface.

【図３】第２実施例の環状板の斜視図である。FIG. 3 is a perspective view of an annular plate according to a second embodiment.

【図４】（Ａ）は第３実施例の加熱器の展開斜視図、
（Ｂ）は第４実施例の加熱器の展開斜視図である。FIG. 4A is a developed perspective view of a heater according to a third embodiment,
(B) is a development perspective view of the heater of a 4th example.

【図５】第５実施例の加熱器の展開斜視図である。FIG. 5 is an exploded perspective view of a heater according to a fifth embodiment.

【図６】（Ａ）は第６実施例の加熱器を取り付けた外燃
機関の部分断面図、（Ｂ）は第６実施例の加熱器の部分
拡大正面図である。FIG. 6 (A) is a partial cross-sectional view of an external combustion engine equipped with a heater of the sixth embodiment, and FIG. 6 (B) is a partially enlarged front view of the heater of the sixth embodiment.

【図７】従来の加熱器が取り付けられた外燃機関の部分
断面図である。FIG. 7 is a partial cross-sectional view of an external combustion engine to which a conventional heater is attached.

【符号の説明】[Explanation of symbols]

１：シリンダ ２：ピストン ３：圧縮室 ５：再生器 ６：冷却器 １４：加熱器 ２１：環状板 ２２：凹凸（切込み） ２３：穴 ２４：接合体 ２５：Ｕベント管 ３２：凹凸（切込み） ３４：加熱器 ３４ａ：ブロック接合体 ４１：環状板 ４４：加熱器 ４４ａ：ブロック接合体 ５１：環状板 ５２：凹凸（切込み） ６１：環状板 ６２：凹凸（切込み） Ａ：流路 Ｂ：流路 Ｃ：隙間 1: Cylinder 2: Piston 3: Compression chamber 5: Regenerator 6: Cooler 14: Heater 21: Annular plate 22: Uneven (cut) 23: Hole 24: Joined body 25: U vent pipe 32: Uneven (cut) 34: Heater 34a: Block bonded body 41: Annular plate 44: Heater 44a: Block bonded body 51: Annular plate 52: Uneven (cut) 61: Annular plate 62: Uneven (cut) A: Flow path B: Flow path C: gap

フロントページの続き (72)発明者 黒澤 美暁 大阪府守口市京阪本通２丁目18番地 三洋 電機株式会社内 (72)発明者 大竹 雅久 大阪府守口市京阪本通２丁目18番地 三洋 電機株式会社内Front page continuation (72) Inventor Miaki Kurosawa 2-18 Keiyohondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Masahisa Otake 2-18-2 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. Within

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 作動ガスが封入されたシリンダと、この
シリンダ内を膨張室と圧縮室とに区画するピストンと、
これら膨張室と圧縮室との間に設置された加熱器、再生
器および冷却器とを備えた外燃機関において、前記加熱
器は、外周面に凹凸が形成され、穴加工が施された複数
枚の環状板を積層してロー付け等により接合し、前記穴
が全体として管状の流路を形成し、この流路を隣接同士
Ｕベント管で連結して作動ガスの流路Ａとし、また、接
合後内周面を切り取ることにより外周面の凹凸だけが残
り、複数個に分割された接合体の間を燃焼ガスの流路Ｂ
とし、この流路Ｂを流れる燃焼ガスと前記流路Ａを流れ
る作動ガスとで熱交換させることを特徴とする外燃機関
の加熱器。1. A cylinder in which a working gas is enclosed, and a piston which divides the inside of the cylinder into an expansion chamber and a compression chamber,
In an external combustion engine provided with a heater, a regenerator and a cooler installed between the expansion chamber and the compression chamber, the heater has a plurality of holes formed with irregularities on the outer peripheral surface thereof. The annular plates are laminated and joined by brazing or the like, the holes form a tubular flow path as a whole, and the flow paths are connected to each other by U vent pipes to form a working gas flow path A, and By cutting off the inner peripheral surface after joining, only the unevenness of the outer peripheral surface remains, and the flow path B of the combustion gas is formed between the plurality of joined bodies.
The heat exchanger of the external combustion engine, wherein heat is exchanged between the combustion gas flowing in the flow passage B and the working gas flowing in the flow passage A. 【請求項２】 作動ガスが封入されたシリンダと、この
シリンダ内を膨張室と圧縮室とに区画するピストンと、
これら膨張室と圧縮室との間に設置された加熱器、再生
器および冷却器とを備えた外燃機関において、前記加熱
器は、内周面に凹凸が形成され、穴加工が施された複数
枚の環状板を積層してロー付け等により接合し、前記穴
が全体として管状の流路を形成し、この流路を隣接同士
Ｕベント管で連結して作動ガスの流路Ａとし、また、接
合後外周面を切り取ることにより内周面の凹凸だけが残
り、複数個に分割された接合体の間を燃焼ガスの流路Ｂ
とし、この流路Ｂを流れる燃焼ガスと前記流路Ａを流れ
る作動ガスとで熱交換させることを特徴とする外燃機関
の加熱器。2. A cylinder in which a working gas is enclosed, and a piston which divides the inside of the cylinder into an expansion chamber and a compression chamber,
In an external combustion engine equipped with a heater, a regenerator and a cooler installed between the expansion chamber and the compression chamber, the heater has an uneven surface formed on its inner peripheral surface and is holed. A plurality of annular plates are laminated and joined by brazing or the like, the hole forms a tubular flow path as a whole, and the flow paths are connected to each other by U vent pipes to form a working gas flow path A, Further, by cutting off the outer peripheral surface after joining, only the unevenness of the inner peripheral surface remains, and the flow path B of the combustion gas is formed between the joined bodies divided into a plurality of parts.
The heat exchanger of the external combustion engine, wherein heat is exchanged between the combustion gas flowing in the flow passage B and the working gas flowing in the flow passage A. 【請求項３】 作動ガスが封入されたシリンダと、この
シリンダ内を膨張室と圧縮室とに区画するピストンと、
これら膨張室と圧縮室との間に設置された加熱器、再生
器および冷却器とを備えた外燃機関において、前記加熱
器は、外周面又は内周面のどちらかに凹凸が形成され、
穴加工が施された複数枚の環状板と、外周面及び内周面
のどちらにも凹凸が無く、前記環状板の巾より小さい巾
を有して穴加工された複数枚の環状板とを交互に積層す
るか、或は、外周面に凹凸が形成され、穴加工されて外
周面の直径が少し小さい複数枚の環状板と、内周面に凹
凸が形成され、穴加工されて内周面の直径が少し大きい
複数枚の環状板とを交互に積層してロー付け等により接
合後、半径方向に切断して複数個の弧状のブロック接合
体を形成することを特徴とする外燃機関の加熱器。3. A cylinder in which a working gas is sealed, and a piston which divides the inside of the cylinder into an expansion chamber and a compression chamber,
In the external combustion engine provided with a heater, a regenerator and a cooler installed between the expansion chamber and the compression chamber, the heater is formed with unevenness on either the outer peripheral surface or the inner peripheral surface,
A plurality of annular plates that have been subjected to hole processing and a plurality of annular plates that have no irregularities on either the outer peripheral surface or the inner peripheral surface and that have a width smaller than the width of the annular plate. Alternately laminated or irregularities are formed on the outer peripheral surface and holes are drilled to form multiple annular plates with a slightly smaller diameter on the outer peripheral surface, and irregularities are formed on the inner peripheral surface, and holes are drilled on the inner peripheral surface. An external combustion engine characterized in that a plurality of annular plates having a slightly larger surface diameter are alternately laminated, joined by brazing, etc., and then cut in the radial direction to form a plurality of arc-shaped block joints. Heater.