JP3019548B2 - Heat exchanger - Google Patents

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は燃焼ガス等の高温ガスに
より冷媒を加熱し冷暖房装置に利用する熱交換器に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger in which a refrigerant is heated by a high-temperature gas such as a combustion gas and used for a cooling and heating device.

【０００２】[0002]

【従来の技術】従来の被加熱側流体に冷媒を用いて、燃
焼ガスにより加熱して液状冷媒を蒸発気化させて潜熱に
より熱を運び暖房を行うものに図４に示すような冷媒加
熱暖房機がある。これは燃焼ガスと冷媒との熱交換を行
う熱交換器１と放熱器２を循環用の密閉管路３で連結す
ると共に密閉管路３中に設けた冷媒搬送機４により冷媒
を強制循環するように構成されている。図５は、熱交換
器１の従来例を示したもので（特開昭５９−１０７１６
７号公報）、水平方向に延びる円筒状内周面に複数のフ
ィン５を設け、外周面軸方向にはパイプ保持部６及び冷
媒が内部を流れるパイプ７を設け、そして、バーナ８か
らの燃焼ガスを円筒状内面に沿い水平横方向に流して、
冷媒搬送機４により送られ、水平横方向のパイプ７内を
流れる冷媒を加熱するものである。９は温度検知器であ
り、前記パイプ保持部６の間の表面に取り付け、冷媒が
異常に温度上昇した場合に加熱を停止するように制御し
ている。2. Description of the Related Art A conventional refrigerant heating / heating machine as shown in FIG. 4 uses a refrigerant as a fluid to be heated and heats it by a combustion gas to evaporate and vaporize a liquid refrigerant to carry heat by latent heat. There is. In this method, a heat exchanger 1 for exchanging heat between a combustion gas and a refrigerant and a radiator 2 are connected by a closed conduit 3 for circulation, and the refrigerant is forcibly circulated by a refrigerant carrier 4 provided in the closed conduit 3. It is configured as follows. FIG. 5 shows a conventional example of the heat exchanger 1 (JP-A-59-10716).
No. 7), a plurality of fins 5 are provided on a cylindrical inner peripheral surface extending in a horizontal direction, a pipe holding portion 6 and a pipe 7 through which a refrigerant flows are provided in an axial direction of an outer peripheral surface, and combustion from a burner 8 is performed. The gas flows horizontally and horizontally along the inner cylindrical surface,
This is for heating the refrigerant sent by the refrigerant transporter 4 and flowing through the pipe 7 in the horizontal and horizontal direction. Reference numeral 9 denotes a temperature detector, which is mounted on the surface between the pipe holding portions 6 and controls so as to stop heating when the temperature of the refrigerant abnormally rises.

【０００３】[0003]

【発明が解決しようとする課題】しかし、この暖房シス
テムでは冷媒搬送に外部動力としての冷媒搬送機４が必
要であり、そこで暖房運転時のランニングコストを低減
することが望まれている。However, in this heating system, the refrigerant transporter 4 is required as an external power for transporting the refrigerant. Therefore, it is desired to reduce the running cost during the heating operation.

【０００４】暖房運転時のランニングコスト低減には冷
媒搬送用の外部動力を無くして無動力で熱搬送すること
が有効である。無動力熱搬送により冷媒加熱暖房を行う
場合、液状冷媒が加熱されて発生する気体冷媒の浮力に
よる自然循環力が重要となる。In order to reduce the running cost during the heating operation, it is effective to eliminate the external power for transporting the refrigerant and carry out the heat transport without power. In the case of performing heating and heating of a refrigerant by non-powered heat transfer, natural circulation force due to buoyancy of a gas refrigerant generated by heating a liquid refrigerant is important.

【０００５】しかしながら上記従来の構成では、図５に
示すように冷媒加熱の熱交換機１のような構成であり、
冷媒は水平方向に延びるパイプ７内を流れるため、加熱
されて気液二相混合状態の冷媒の気体成分がスムーズに
出口に向かって流れないため冷媒の淀みを生じ、局部的
な異常過熱を発生し、また燃焼室と熱交換部が一体であ
るため熱交換量が燃焼状態により不均一となり局部過熱
を生じ冷媒の熱分解あるいは機器の異常温度上昇など、
機器の信頼性能上、課題があった。[0005] However, in the above-mentioned conventional configuration, as shown in FIG.
Since the refrigerant flows through the pipe 7 extending in the horizontal direction, the gas component of the refrigerant in a gas-liquid two-phase mixed state does not flow smoothly toward the outlet because the refrigerant flows, causing stagnation of the refrigerant and causing local abnormal overheating. In addition, since the combustion chamber and the heat exchange unit are integrated, the heat exchange amount becomes uneven depending on the combustion state, causing local overheating, thermal decomposition of refrigerant or abnormal temperature rise of equipment, etc.
There was a problem in the reliability performance of the equipment.

【０００６】また、冷媒が異常温度上昇する時、冷媒が
潜熱変化した後顕熱変化するため、この時、冷媒は急激
に温度上昇し、温度検知器の熱容量による応答遅れが生
じた。そのため冷媒が過熱し熱分解を発生し、性能劣化
や腐食等機器の信頼性で問題であった。Further, when the refrigerant abnormally rises in temperature, the refrigerant changes in latent heat and then changes in sensible heat. At this time, the temperature of the refrigerant rises rapidly, causing a response delay due to the heat capacity of the temperature detector. As a result, the refrigerant is overheated and thermally decomposed, which is a problem in equipment reliability such as performance degradation and corrosion.

【０００７】本発明は上記課題を解決するもので、高温
燃焼ガスを燃焼室から均一に熱交換部に導き冷媒の均一
循環の維持とにより冷媒の熱分解を生じなく信頼性の高
いシステムとし、さらに冷媒加熱器に冷媒が不足した場
合等、冷媒が過熱した時直ちにこれを検知し機器の保護
とシステムの動作を正常化することを目的としたもので
ある。The present invention solves the above-mentioned problems, and a high-reliability system in which a high-temperature combustion gas is uniformly guided from a combustion chamber to a heat exchange section to maintain a uniform circulation of the refrigerant without causing thermal decomposition of the refrigerant, Further, the present invention aims to immediately detect when the refrigerant is overheated, for example, when the refrigerant is insufficient in the refrigerant heater, and to protect the equipment and normalize the operation of the system.

【０００８】[0008]

【課題を解決するための手段】本発明は上記目的を達成
するため、燃料供給装置に接続したバーナを有する燃焼
室と、前記燃焼室に燃焼ガス出口に連通して設けた高温
ガス通路と、この高温ガス通路の外周伝熱隔壁に密着し
た高温ガス通路体の多数の伝熱フィンと、前記高温ガス
通路と反対側において前記伝熱隔壁と一体にした冷媒通
路部材と、前記冷媒通路部材と対向した高温ガス通路に
位置する伝熱隔壁および高温ガス通路体に密着した伝熱
具と、前記伝熱具に対向した高温ガス通路体に温度検知
手段を設けた構成としてある。According to the present invention, there is provided a combustion system having a burner connected to a fuel supply device.
And a high-temperature chamber provided in communication with a combustion gas outlet in the combustion chamber.
The gas passage and the outer peripheral heat transfer partition of this high-temperature gas passage
Heat transfer fins of the hot gas passage body
A refrigerant passage integrated with the heat transfer partition on the side opposite to the passage.
Path member and a high-temperature gas passage facing the refrigerant passage member.
Heat transfer in close contact with the located heat transfer partition and hot gas passage
And the high temperature gas passage facing the heat transfer tool
This is a configuration provided with means .

【０００９】[0009]

【作用】本発明は上記構成によって、熱交換器で燃焼ガ
スの温度と流れを均一にでき、かつ冷媒の流れは、冷媒
入口管より液相の状態で流入し、入口ヘッダーパイプで
冷媒通路部材の各々の冷媒通路に分流し、この冷媒通路
途中で熱を受けその一部がガス化し、その後、この冷媒
は出口ヘッダーパイプで集合して冷媒出口管より冷媒回
路に流れるため、冷媒通路部材の各部を均一加熱しスム
ーズに冷媒を循環させ、かつ冷媒を局部過熱させること
がなく冷媒の熱分解を生じない。According to the present invention, the temperature and the flow of the combustion gas can be made uniform in the heat exchanger, and the flow of the refrigerant flows in a liquid state from the refrigerant inlet pipe by the heat exchanger. The refrigerant flows into each of the refrigerant passages, receives heat in the middle of the refrigerant passages, and a portion of the refrigerant gasifies.After that, the refrigerant gathers at the outlet header pipe and flows from the refrigerant outlet pipe to the refrigerant circuit. The components are uniformly heated to smoothly circulate the refrigerant, and the refrigerant does not locally overheat, so that the refrigerant is not thermally decomposed.

【００１０】そして、前記伝熱具に対向した高温ガス通
路体設けた前記温度検知手段により、冷媒加熱器に冷媒
が不足した場合等、冷媒が過熱した時直ちにこれを検知
し機器の保護とシステムの動作を正常化できる。[0010] Then, a high-temperature gas flow opposed to the heat transfer tool is provided.
The temperature detecting means provided on the road body can immediately detect when the refrigerant is overheated, for example, when the refrigerant is insufficient in the refrigerant heater, and protect the equipment and normalize the operation of the system.

【００１１】すなわち、運転中、高温燃焼ガスの熱は、
伝熱フィンと伝熱隔壁で受熱し、伝熱隔壁から冷媒通路
部材に伝熱し、冷媒を加熱する。冷媒通路内の冷媒は、
熱を受けてその一部が気化し潜熱変化するため、冷媒の
圧力に応じて常に一定である。前記冷媒通路部材と反対
側において前記伝熱隔壁および高温ガス通路体に密着し
た伝熱具と、この伝熱具に対向した高温ガス通路体に温
度検知手段を設けた構成としたことにより、温度検知手
段は、伝熱具から熱を受けて一定の温度を保っており、
この伝熱具は、高温燃焼ガスの熱を受熱し、伝熱隔壁か
ら冷媒通路部材に伝熱し冷媒を加熱することで放熱して
熱的に平衡となり一定の温度となっている。冷媒が外部
に洩れる等、充填量の減少あるいは循環量が減少した
時、冷媒が潜熱変化した後顕熱変化に移行するため急激
に温度が上昇する。そのため、伝熱具から冷媒通路部材
に放熱する熱量は急減し、伝熱具は高温ガスからの受熱
によって、伝熱具と温度検知器の温度は急速に上昇し応
答遅れ無く温度検知器は動作する。そのため冷媒加熱器
に冷媒が不足した場合等冷媒が過熱する時、温度検知手
段の温度は直ちにこれを検知し機器の保護とシステムの
動作を正常化でき、冷媒の熱分解、劣化が生じ無く信頼
性の高いシステムになる。That is, during operation, the heat of the high-temperature combustion gas is:
Heat is received by the heat transfer fins and the heat transfer partition , transferred from the heat transfer partition to the refrigerant passage member, and heats the refrigerant. The refrigerant in the refrigerant passage is
Since a part of the heat is vaporized by the heat and the latent heat is changed, the heat is always constant according to the pressure of the refrigerant. A heat transfer member closely attached to the heat transfer partition and the high-temperature gas passage body on the side opposite to the refrigerant passage member, and a structure provided with a temperature detecting means in the high-temperature gas passage body facing the heat transfer member; As a result, the temperature detecting means receives heat from the heat transfer tool and maintains a constant temperature,
The heat transfer tool receives heat of the high-temperature combustion gas, transfers the heat from the heat transfer partition to the refrigerant passage member, heats the refrigerant, radiates heat, and is thermally equilibrated to a constant temperature. When the amount of charge or the amount of circulation decreases, such as when the refrigerant leaks to the outside, the refrigerant rapidly changes its latent heat and then changes to sensible heat, causing the temperature to rise sharply. Therefore, the amount of heat radiated from the heat transfer device to the refrigerant passage member decreases sharply, and the heat transfer device receives heat from the high-temperature gas, so that the temperature of the heat transfer device and the temperature detector rise rapidly, and the temperature detector operates without a response delay. I do. Therefore, when the refrigerant overheats, such as when the refrigerant in the refrigerant heater runs short, the temperature of the temperature detection means can immediately detect this and protect the equipment and normalize the operation of the system, without causing thermal decomposition and deterioration of the refrigerant and reliability It becomes a highly responsive system.

【００１２】[0012]

【実施例】以下、本発明の実施例を添付図面を参照して
説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.

【００１３】図１から図３において、１０は内面に断熱
材２３を設けて燃焼室１０ａを形成した円筒状の燃焼室
ケースで、底部にバーナ８を臨ませている。この燃焼室
ケース１０は先端の開口面を、多数の縦方向の高温ガス
通路１２を有する高温ガス通路体１２ａの外面に接合さ
せている。高温ガス通路体１２ａは上下に２分割して両
者間に、各高温ガス通路１２が燃焼室１０ａの燃焼ガス
出口１３へ連通するように横長の入口１２ｂを形成して
いる。そして、高温ガス通路体１２ａは伝熱隔壁１１に
接合して、これに高温ガス通路１２の熱及び伝熱フィン
２２を通じて熱を均一に伝える。１４ａは燃焼室ケース
１０の先端を延長して、高温ガス通路体１２ａの各高温
ガス通路１２の上下の出口側および高温ガス通路体１２
ａの左右側を囲んで排気室１４ｂを形成した排気ケース
で、上部に排気路１４を有する。１５は伝熱隔壁１１の
外面に熱的に連結させた冷媒通路部材であり、縦方向の
通路１６が多数設けられている。１７は冷媒通路部材１
６の下端に設けた入口ヘッダー管、１８は冷媒通路部材
１６の上端に設けた出口ヘッダー管であり、それぞれ冷
媒入口管１９、冷媒出口管２０を接続しこのおのおのに
より冷媒回路と接続しており、入口ヘッダー管１７の他
端には下方に曲折しオイル抜き管２１を設けてある。入
口ヘッダー管１７と出口ヘッダー管１８はそれぞれ縦方
向の通路１６により連通している。２２は伝熱隔壁１１
の内側に熱的に接するように設けられた伝熱フィンであ
り、多数枚としてある。燃焼室１０ａの高温ガス通路１
２と接しない残りの外面は全面を覆う断熱材２３を燃焼
ケース１０の内部に設けてある。高温ガス通路１２の伝
熱隔壁１１の一部にこの伝熱隔壁１１と高温ガス通路体
１２ａに密着して伝熱具２４を設け、この冷媒通路部材
１６に対向する位置の伝熱具２４と、この伝熱具２４と
対向した高温通路体１２ａに温度検知手段として温度ス
イッチ２５を取り付けた構成としたものである。本実施
例では、伝熱具２４、フィン１２、伝熱隔壁１１をアル
ミ材とし、伝熱具２４は伝熱フィン２２に嵌合した状態
で伝熱隔壁１１にブレージングロー付けすることによ
り、伝熱隔壁１１と伝熱フィン２２に伝熱具２４を密着
して設けてある。この伝熱具２４と接した高温ガス通路
体１２ａに温度スイッチ２５を熱伝導材を塗布して固定
ビス２６で保持している。２７は温度スイッチ２５の検
出出力によりシステムを制御する制御器である。1 to 3, reference numeral 10 denotes a cylindrical combustion chamber case in which a heat insulating material 23 is provided on an inner surface to form a combustion chamber 10a, and a burner 8 faces the bottom. The combustion chamber case 10 has an opening surface at the front end joined to an outer surface of a high-temperature gas passage body 12a having a number of vertical high-temperature gas passages 12. The high-temperature gas passage body 12a is vertically divided into two parts, and a horizontally elongated inlet 12b is formed between the two so that each high-temperature gas passage 12 communicates with a combustion gas outlet 13 of the combustion chamber 10a. Then, the high-temperature gas passage body 12a is joined to the heat transfer partition 11, and the heat of the high-temperature gas passage 12 and the heat are transferred uniformly through the heat transfer fins 22 thereto. 14a is an extension of the front end of the combustion chamber case 10, and the upper and lower outlet sides of each hot gas passage 12 of the hot gas passage body 12a and the hot gas passage body 12a.
An exhaust case in which an exhaust chamber 14b is formed so as to surround the left and right sides of FIG. Reference numeral 15 denotes a refrigerant passage member thermally connected to the outer surface of the heat transfer partition 11, and a number of vertical passages 16 are provided. 17 is a refrigerant passage member 1
An inlet header pipe provided at the lower end of 6 and an outlet header pipe 18 provided at the upper end of the refrigerant passage member 16 are connected to a refrigerant inlet pipe 19 and a refrigerant outlet pipe 20, respectively, and each of them is connected to a refrigerant circuit. The other end of the inlet header pipe 17 is provided with an oil drain pipe 21 bent downward. The inlet header pipe 17 and the outlet header pipe 18 communicate with each other by a vertical passage 16. 22 is a heat transfer partition 11
The heat transfer fins are provided so as to be in thermal contact with the inside of the fin. High temperature gas passage 1 of combustion chamber 10a
A heat insulating material 23 is provided inside the combustion case 10 so as to cover the entire remaining outer surface not in contact with 2. The heat transfer partition wall 11 in a part of the heat transfer partition wall 11 of the hot gas path 12 and the hot gas passage body
The heat transfer device 24 provided in close contact with the 12a, the heat transfer member 24 in position against countercurrent to the refrigerant passage member 16, this Dennetsugu 24
In this configuration, a temperature switch 25 is attached to the opposed high-temperature passage body 12a as temperature detection means. In this embodiment, the heat transfer tool 24, the fins 12, and the heat transfer partition 11 are made of aluminum, and the heat transfer tool 24 is brazed to the heat transfer partition 11 in a state of being fitted to the heat transfer fins 22, so that the heat transfer is performed. A heat transfer tool 24 is provided in close contact with the heat partition 11 and the heat transfer fins 22. High-temperature gas passage in contact with this heat transfer tool 24
A temperature switch 25 is coated on the body 12a with a heat conductive material and held by fixing screws 26. 27 is a controller for controlling the system based on the detection output of the temperature switch 25.

【００１４】上記構成において、燃料の供給装置により
供給した燃料はバーナー８で燃焼し、燃焼室１０ａに発
生した高温ガスは燃焼ガス出口１３から入口１２ｂを通
り高温ガス通路体１２ａの上下に２分割した各々に流れ
て高温ガス通路１２である伝熱フィン２２の間の通路を
通り、高温ガス通路１２の上の出口から排気室１４ｂに
流れる高温ガスと、高温ガス通路１２の下の出口から高
温ガス通路体１２ａの左右側を囲んだ排気室１４ｂに流
れる高温ガスは排気室１４ｂで合流し排気路１４に流れ
る。冷媒入口管１９を通って入口ヘッダー管１７に入っ
た液冷媒は冷媒通路部材１５の下部より多数の縦方向の
冷媒通路１６に分流して流れ、高温ガス通路１２内を流
れる燃焼ガスから伝熱フィン２２により燃焼ガスから熱
を冷媒通路部材１５に伝熱し、この冷媒通路部材１５の
縦方向の冷媒通路１６内の冷媒を入口ヘッダー１７に近
い下部より十分に加熱する。そこで加熱された液状冷媒
は気化蒸発を開始し液の中に気泡を生じる気液二相状態
となる。発生した気泡は浮力効果で縦方向に設けた冷媒
通路１６内を下方から上方に上昇する。特に燃焼ガスは
燃焼室１０ａから燃焼ガス出口１３を出たのち高温ガス
通路１２で冷媒に伝熱するために、燃焼ガスの温度と流
れが均一となり冷媒通路部材の各部を均一加熱できスム
ーズかつ均一に冷媒を蒸発させ、かつ冷媒を局部過熱さ
せることがなく無動力熱搬送を確実におこなわせ冷媒の
熱分解を生じない。そして、均一加熱により冷媒通路１
６の各々の流量が均等となり全体として抵抗を低減さ
せ、気泡上昇力は強められ自然循環力が強くなり上部へ
冷媒を送る気泡ポンプ作用が発生する。さらに冷媒通路
１６の上部、下部においても設けた伝熱フィン２２以外
の伝熱隔壁１１全面も伝熱面積となり高温ガス通路１２
を流れる加熱流体から効率よく吸熱し冷媒通路１６内の
気液二相状態の冷媒をさらに加熱して自然循環力をさら
に増大させる。冷媒通路１６の上端に達した冷媒は出口
ヘッダー管１８に流入し冷媒出口管２０より放熱器（図
示せず）に向かって流出する。In the above configuration, the fuel supplied by the fuel supply device is burned by the burner 8, and the high-temperature gas generated in the combustion chamber 10a is divided into two parts by a hot gas passage 13a through a combustion gas outlet 13 and an inlet 12b. The high-temperature gas flows into the exhaust chamber 14b from the outlet above the high-temperature gas passage 12 through the passage between the heat transfer fins 22 as the high-temperature gas passage 12, The high-temperature gas flowing into the exhaust chamber 14b surrounding the left and right sides of the gas passage body 12a joins in the exhaust chamber 14b and flows into the exhaust path 14. The liquid refrigerant that has entered the inlet header pipe 17 through the refrigerant inlet pipe 19 branches off from the lower part of the refrigerant passage member 15 into a plurality of vertical refrigerant passages 16 and flows therethrough, and transfers heat from the combustion gas flowing in the high-temperature gas passage 12. The heat from the combustion gas is transferred from the combustion gas to the refrigerant passage member 15 by the fins 22, and the refrigerant in the refrigerant passage 16 in the vertical direction of the refrigerant passage member 15 is sufficiently heated from the lower portion near the inlet header 17. Then, the heated liquid refrigerant starts vaporizing and evaporating, and enters a gas-liquid two-phase state in which bubbles are generated in the liquid. The generated bubbles rise upward from below in the refrigerant passage 16 provided in the vertical direction by the buoyancy effect. In particular, the combustion gas exits the combustion gas outlet 13 from the combustion chamber 10a and then transfers heat to the refrigerant in the high-temperature gas passage 12, so that the temperature and flow of the combustion gas become uniform, so that each part of the refrigerant passage member can be heated uniformly and smoothly and uniformly. Thus, the refrigerant is evaporated and the refrigerant is not locally heated, so that the non-powered heat transfer is reliably performed, and the thermal decomposition of the refrigerant does not occur. Then, the refrigerant passage 1 is uniformly heated.
6, the flow rate of each of them becomes uniform, the resistance is reduced as a whole, the bubble rising force is strengthened, the natural circulation force is strengthened, and a bubble pump action for sending the refrigerant to the upper part occurs. Further, the entire surface of the heat transfer partition 11 other than the heat transfer fins 22 provided at the upper and lower portions of the refrigerant passage 16 also has a heat transfer area and the high-temperature gas passage 12
Heat is efficiently absorbed from the heating fluid flowing through the refrigerant passage, and the refrigerant in the gas-liquid two-phase state in the refrigerant passage 16 is further heated to further increase the natural circulation force. The refrigerant that has reached the upper end of the refrigerant passage 16 flows into the outlet header tube 18 and flows out of the refrigerant outlet tube 20 toward a radiator (not shown).

【００１５】また、高温ガス通路１２の内壁を前記燃焼
室１０ａで構成し外壁を構成する伝熱隔壁１１とこの伝
熱隔壁１１と密着した冷媒通路部材１５で構成した二重
壁構成により、前記内壁から伝熱フィン２２を通じて冷
媒通路１６に伝熱するため伝熱効率が上昇し、また多穴
管構成の冷媒通路部材１５で構成した二重壁構成による
冷媒の燃焼ガス部への洩れ防止と高温の燃焼室１０ａと
冷媒通路１６を高温ガス通路１２で完全に分離したため
局部過熱による冷媒の熱分解、劣化が生じ無く信頼性の
高いシステムである。燃焼室１０ａの高温ガス通路１２
と接しない残りの外面は断熱材２３で覆い放熱を防止す
る。Also, the inner wall of the high-temperature gas passage 12 is constituted by the combustion chamber 10a, and the heat transfer partition 11 constituting the outer wall and the double wall structure constituted by the refrigerant passage member 15 which is in close contact with the heat transfer partition 11, Heat is transferred from the inner wall to the refrigerant passage 16 through the heat transfer fins 22 to increase the heat transfer efficiency, and the double-wall structure formed of the refrigerant passage member 15 having a multi-hole tube structure prevents the refrigerant from leaking to the combustion gas portion and increases the temperature. Since the combustion chamber 10a and the refrigerant passage 16 are completely separated by the high-temperature gas passage 12, thermal decomposition and deterioration of the refrigerant due to local overheating do not occur and the system is highly reliable. Hot gas passage 12 of combustion chamber 10a
The remaining outer surface that is not in contact with is covered with a heat insulating material 23 to prevent heat radiation.

【００１６】さらに冷媒通路部材１６を内部に多数の穴
を持つアルミニウム製の多穴偏平押し出し管とし、伝熱
フィン２２として帯状のアルミニウム製の板を波状に屈
曲させるかアルミニウム製の押し出し材で構成し、かつ
伝熱隔壁１１はアルミニウム製心材の表裏にろう材を事
前にクラッドしたブレージングシートとしてこの素材を
用いた伝熱隔壁１１の内外面にアルミニウム製の伝熱具
を嵌合させたアルミニウム製の伝熱フィン２２およびア
ルミニウム製の多穴偏平押し出し管の冷媒通路部材１６
を用いて組立て、同時に一体ブレージングすることによ
り熱的に連結でき、接触熱抵抗が無い伝熱性能に優れた
熱交換器を軽量で、かつ低コストで実用に共することが
できる。Further, the refrigerant passage member 16 is an aluminum multi-hole flat extruded tube having a large number of holes therein, and the heat transfer fins 22 are formed by bending a strip-shaped aluminum plate into a wave shape or by using an extruded aluminum material. The heat transfer partition 11 is made of aluminum in which an aluminum heat transfer tool is fitted on the inner and outer surfaces of the heat transfer partition 11 using this material as a brazing sheet in which a brazing material is pre-clad on the front and back of an aluminum core material. Heat transfer fin 22 and refrigerant passage member 16 of aluminum multi-hole flat extruded tube
The heat exchanger which can be thermally connected by assembling and simultaneously brazing at the same time and having excellent heat transfer performance without contact heat resistance can be used practically at a low cost and at a low cost.

【００１７】運転中、高温ガス通路１２を流れる燃焼ガ
スの熱は、伝熱フィン２２とともに伝熱具２４でも受熱
する。この熱は伝熱隔壁１１から冷媒通路部材１５に伝
熱し、冷媒を加熱する。冷媒通路１６内の冷媒は熱を受
けてその一部が気化し潜熱変化するため、冷媒の圧力に
応じて常に一定温度である。冷媒通路部材１５に対向す
る伝熱具２４と、この伝熱具２４と対向した高温ガス通
路体１２ａに温度検知手段として温度スイッチ２５を設
けてあるため、この温度スイッチ２５は、伝熱具２４の
温度を検知し、伝熱具２５は伝熱フィン２２と高温ガス
から熱を受け冷媒通路部材１５に放熱して一定の温度に
平衡し保っているため、冷媒が外部に洩れる等、充填量
の減少あるいは循環量が減少した時、冷媒が潜熱変化し
た後顕熱変化に移行する時急激に温度が上昇する。その
ため、温度スイッチ２５の冷媒通路部材１５に放熱する
熱量は急減し、他方伝熱フィン２２、高温ガスからの熱
量は変わらないため、温度スイッチ２５の温度は急速に
上昇し応答遅れ無く検知し、制御器は動作する。During operation, the heat of the combustion gas flowing through the high-temperature gas passage 12 is received by the heat transfer tool 24 together with the heat transfer fins 22. This heat is transferred from the heat transfer partition 11 to the refrigerant passage member 15 to heat the refrigerant. Since the refrigerant in the refrigerant passage 16 receives heat and a part of the refrigerant evaporates and changes latent heat, the refrigerant always has a constant temperature according to the pressure of the refrigerant. A pair countercurrent to <br/>Ruden'netsugu 24 to coolant passage member 15, opposing the hot gas communication with this Dennetsugu 24
Since the road body 12a is provided with a temperature switch 25 as temperature detecting means, the temperature switch 25 detects the temperature of the heat transfer tool 24, and the heat transfer tool 25 receives heat from the heat transfer fins 22 and the high-temperature gas, Since the heat is radiated to the passage member 15 and is kept at a constant temperature, when the refrigerant leaks to the outside, the filling amount decreases or the circulation amount decreases, when the refrigerant changes latent heat and then changes to sensible heat. The temperature rises rapidly. Therefore, the amount of heat radiated to the refrigerant passage member 15 of the temperature switch 25 decreases rapidly, while the amount of heat from the heat transfer fins 22 and the high-temperature gas does not change, so that the temperature of the temperature switch 25 rises rapidly and is detected without a response delay. The controller operates.

【００１８】このことにより、冷媒加熱器に冷媒が不足
した場合等冷媒が過熱する時、温度スイッチ２５の温度
は直ちにこれを検知し機器の保護とシステムの動作を正
常化でき、冷媒の熱分解、劣化が生じ無く信頼性の高い
システムになる。Thus, when the refrigerant is overheated, such as when the refrigerant in the refrigerant heater runs short, the temperature of the temperature switch 25 is immediately detected, and the protection of the equipment and the operation of the system can be normalized, and the thermal decomposition of the refrigerant can be achieved. Thus, a highly reliable system can be obtained without deterioration.

【００１９】オイルが多く溜るとその粘性と低熱伝導の
ため冷媒の気化、循環を阻害する。この場合、冷媒が減
少した時と同様に、冷媒通路１６に流れる冷媒流量は少
なくなり、冷媒流量が所定より少なくなると全て気化
（ガス化）して顕熱による温度上昇が生じ、温度検知手
段である温度スイッチ２５の温度が上昇する。この検出
出力により冷媒通路部材１５である冷媒通路１６の底部
に設けた入口ヘッダー１７に接続したオイル抜き管２１
から排出することにより確実にオイルを加熱器から除去
し冷媒の均一循環の維持により局部過熱による冷媒の熱
分解を生じなく信頼性の高いシステムである。If a large amount of oil accumulates, its viscosity and low heat conduction hinder the vaporization and circulation of the refrigerant. In this case, the flow rate of the refrigerant flowing through the refrigerant passage 16 decreases as in the case where the amount of the refrigerant decreases, and when the refrigerant flow rate becomes lower than a predetermined value, all of the refrigerant evaporates (gasifies) and the temperature rises due to sensible heat. The temperature of a certain temperature switch 25 rises. Based on this detection output, an oil drain pipe 21 connected to an inlet header 17 provided at the bottom of the refrigerant passage 16 as the refrigerant passage member 15
The system reliably removes oil from the heater by discharging from the heater and maintains the uniform circulation of the refrigerant without causing thermal decomposition of the refrigerant due to local overheating.

【００２０】図３は本発明の他の実施例を示し、伝熱具
２４には燃焼ガスが通過する高温ガス通路１２に両端が
連通するガス通路２８が設けてある。運転中、高温ガス
通路１２を流れる燃焼ガスの熱は、伝熱具２４の外周と
ともにガス通路２８をも流れ、熱を受熱する。このた
め、伝熱具２４は燃焼ガスから受ける熱量が大きくな
り、冷媒に放熱する熱量も大きい状態で平衡となるた
め、伝熱具２４と冷媒通路１６の温度勾配が大きくな
る。このため、冷媒が過熱する時、温度スイッチ２５の
温度上昇が早くなり、直ちに温度スイッチ２５がこれを
検知し機器の保護とシステムの動作を正常化でき、冷媒
の熱分解、劣化が生じ無く信頼性の高いシステムにな
る。FIG. 3 shows another embodiment of the present invention. The heat transfer tool 24 is provided with a gas passage 28 having both ends communicating with the high-temperature gas passage 12 through which the combustion gas passes. During operation, the heat of the combustion gas flowing through the high-temperature gas passage 12 also flows through the gas passage 28 together with the outer periphery of the heat transfer tool 24 and receives the heat. Therefore, the heat transfer member 24 receives a large amount of heat from the combustion gas and becomes equilibrium with a large amount of heat radiated to the refrigerant, so that the temperature gradient between the heat transfer member 24 and the refrigerant passage 16 increases. Therefore, when the refrigerant is overheated , the temperature of the temperature switch 25 rises quickly, and the temperature switch 25 immediately detects this, and can protect the equipment and normalize the operation of the system. It becomes a highly responsive system.

【００２１】この実施例の構成によれば、冷媒加熱器に
冷媒が不足した場合等、冷媒が過熱した時、温度検知手
段の時間的応答性が向上し直ちにこれを検知し機器の保
護とシステムの動作を正常化する。According to the structure of this embodiment, when the refrigerant is overheated, for example, when the refrigerant in the refrigerant heater is insufficient, the temporal response of the temperature detecting means is improved, and this is immediately detected to protect the equipment. Normalize the operation of.

【００２２】[0022]

【発明の効果】以上説明したように本発明は、次の効果
が得られる。 （１）伝熱具は高温ガスから熱を受けることにより、温
度検知手段は応答遅れ無く検知でき、冷媒加熱器に冷媒
が不足した場合等冷媒が過熱した時、応答遅れなく直ち
にこれを検知し機器の保護とシステムの動作を正常化で
き、冷媒の熱分解、劣化が生じ無く信頼性の高いシステ
ムにできる。 （２）燃焼室から噴出した燃焼ガスは高温ガス通路を通
過させることにより、燃焼ガスの温度と流れを均一化で
き、このため冷媒通路部材の各部は均一加熱となりスム
ーズに冷媒を循環させ、かつ冷媒を局部過熱させること
無く熱分解を生じなくできる。 （３）高温ガス通路と反対側に伝熱隔壁と一体とした冷
媒通路部材を構成した二重壁構成により、冷媒を燃焼ガ
ス部と完全に分離したため、冷媒が洩れた場合も火炎に
直接冷媒ガスが触れることが無く安全性が高いものにで
きる。 （４）伝熱具に燃焼ガスが通過するガス通路を設けてい
るから、伝熱具の温度がさらに高温に保たれるため、異
常時には温度検知手段がより早く検知し機器の保護とシ
ステムの動作を正常化でき、冷媒の熱分解、劣化が生じ
無く信頼性の向上がはかれる。As described above, the present invention has the following effects. (1) heat transfer device is by receiving heat from the hot gas, the temperature detecting means can detect the response delay without, when refrigerant such as when the refrigerant is insufficient in the refrigerant heater is overheated, it detects this immediately without delay responding The protection of the equipment and the normal operation of the system can be normalized, and the system can be made highly reliable without thermal decomposition and deterioration of the refrigerant. (2) The combustion gas ejected from the combustion chamber passes through the high-temperature gas passage, so that the temperature and the flow of the combustion gas can be made uniform. Therefore, each part of the refrigerant passage member is uniformly heated and the refrigerant is smoothly circulated. Thermal decomposition can be prevented without locally overheating the refrigerant. (3) Since the refrigerant is completely separated from the combustion gas portion by the double-wall configuration in which the refrigerant passage member integrated with the heat transfer partition is provided on the opposite side to the high-temperature gas passage, even if the refrigerant leaks, the refrigerant is directly applied to the flame. High safety can be achieved without gas contact. (4) Since the gas path through which the combustion gas passes is provided in the heat transfer tool, the temperature of the heat transfer tool is maintained at a higher temperature. The operation can be normalized, and the reliability is improved without causing thermal decomposition and deterioration of the refrigerant.

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

【図１】本発明の一実施例における熱交換器の断面図FIG. 1 is a cross-sectional view of a heat exchanger according to an embodiment of the present invention.

【図２】同熱交換器の冷媒通路部材部分の断面図FIG. 2 is a sectional view of a refrigerant passage member of the heat exchanger.

【図３】本発明の他の実施例における熱交換器の部分断
面図FIG. 3 is a partial cross-sectional view of a heat exchanger according to another embodiment of the present invention.

【図４】従来の冷媒加熱機の回路構成図FIG. 4 is a circuit configuration diagram of a conventional refrigerant heater.

【図５】従来の冷媒加熱機の外観斜視図FIG. 5 is an external perspective view of a conventional refrigerant heater.

【符号の説明】[Explanation of symbols]

８ バーナー １０ａ 燃焼室 １１ 伝熱隔壁 １２ 高温ガス通路１２ａ 高温ガス通路体 １５ 冷媒通路部材 ２４ 伝熱具 ２５ 温度検知手段 ２８ ガス通路Reference Signs List 8 burner 10a combustion chamber 11 heat transfer partition 12 high temperature gas passage 12a high temperature gas passage 15 refrigerant passage member 24 heat transfer tool 25 temperature detecting means 28 gas passage

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−213665（ＪＰ，Ａ) 特開 平２−64398（ＪＰ，Ａ) (58)調査した分野(Int.Cl.⁷，ＤＢ名) F28D 7/00 F24H 1/12 F25B 41/00 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-213665 (JP, A) JP-A-2-64398 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F28D 7/00 F24H 1/12 F25B 41/00

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】燃料供給装置に接続したバーナを有する燃
焼室と、前記燃焼室に燃焼ガス出口に連通して設けた高
温ガス通路と、この高温ガス通路の外周伝熱隔壁に密着
した高温ガス通路体の多数の伝熱フィンと、前記高温ガ
ス通路と反対側において前記伝熱隔壁と一体にした冷媒
通路部材と、前記冷媒通路部材と対向した高温ガス通路
に位置する伝熱隔壁および高温ガス通路体に密着した伝
熱具と、前記伝熱具に対向した高温ガス通路体に温度検
知手段を設けた熱交換器。1. A combustion chamber having a burner connected to a fuel supply device, a high-temperature gas passage provided in the combustion chamber in communication with a combustion gas outlet, and a close contact with an outer heat transfer partition of the high-temperature gas passage.
A plurality of heat transfer fins of the high temperature gas passage body, a refrigerant passage member integrated with the heat transfer partition on a side opposite to the high temperature gas passage, and a high temperature gas passage facing the refrigerant passage member
Heat exchanger having a temperature sensing means and the heat transfer member in close contact with the heat transfer partition wall and the hot gas path member located in the hot gas passage body which is opposed to the heat transfer device to. 【請求項２】伝熱具には高温ガス通路に両端が連通する
ガス通路を設けた請求項１記載の熱交換器。2. The heat exchanger according to claim 1, wherein the heat transfer tool has a gas passage having both ends communicating with the high-temperature gas passage.