JP2004245467A - Steam generator - Google Patents

Steam generator Download PDF

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Publication number
JP2004245467A
JP2004245467A JP2003034102A JP2003034102A JP2004245467A JP 2004245467 A JP2004245467 A JP 2004245467A JP 2003034102 A JP2003034102 A JP 2003034102A JP 2003034102 A JP2003034102 A JP 2003034102A JP 2004245467 A JP2004245467 A JP 2004245467A
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JP
Japan
Prior art keywords
water
superheated steam
steam generator
steam
saturated
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.)
Pending
Application number
JP2003034102A
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Japanese (ja)
Inventor
Seiji Takami
星司 高見
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP2003034102A priority Critical patent/JP2004245467A/en
Publication of JP2004245467A publication Critical patent/JP2004245467A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To efficiently generate saturated or superheated steam corresponding to a given quantity of heat while suppressing harsh sounds during jetting the saturated or superheated steam. <P>SOLUTION: A water pipe 3 has a wavy cross section. Thus, its contact area with water is increased to efficiently transferring a quantity of heat from a heater 4. The flow rate of the water can be reduced and the flow rate of the water and a temperature difference are further reduced by mounting a coil spring 7 thereon. The water is stably vaporized without generating harsh vaporizing sounds and the saturated or superheated steam is efficiently generated. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、飽和水蒸気により被加熱物の加熱、加湿を行う飽和水蒸気発生装置、または100℃以上の過熱蒸気により被加熱物の加熱、殺菌、乾燥を行う過熱蒸気発生装置に関する。
【0002】
【従来の技術】
図4は、従来の蒸気発生装置の斜視図である。この蒸気発生装置1は、給水タンク等から供給された水を熱源であるシーズヒータ5をアルミ6で鋳込んだヒータ4によって加熱された水パイプ3に通過させて飽和水蒸気を生成し、噴出口2から飽和水蒸気を噴霧するものである。
【0003】
このような蒸気発生装置の応用例として、飽和水蒸気を用い食品等の被調理物の加熱、加湿または、飽和水蒸気を更に加熱した100℃以上の過熱蒸気によって、食品等の被調理物の加熱を行う加熱調理器がよく知られている。この加熱調理装置においては、上記蒸気発生装置にて発生させた飽和水蒸気を過熱蒸気発生装置にて更に加熱して、過熱蒸気を生成する。この過熱蒸気を、被調理物を収容した加熱室内に供給して、加熱調理を行う。加熱室内の温度が、被調理物に応じた所定の温度になり、被調理物に適した加熱時間が経過すると、過熱蒸気の供給が停止され、調理が完了する。
【0004】
すなわち、過熱蒸気を使用することにより、被調理物内の水分の蒸発を防止して、しっとりとした仕上りに調理することが可能である。また、過熱蒸気は空気よりも熱伝導率が高いので、調理時間を短縮することができるとともに、加熱室内が無酸素状態に近くなり、被調理物の酸化を低減することが可能である。
【0005】
このような過熱蒸気を使用した加熱調理器の構造については、過熱蒸気を加熱室内に直接供給するものが提案されている(例えば、特許文献1参照。)。
【0006】
【特許文献1】
特開平9−4849号公報
【0007】
【発明が解決しようとする課題】
しかしながら、従来の蒸気発生装置1は、水パイプ3がストレートパイプから成るので、水パイプ3を通過する水流が速くなり、ヒータ4によって与えた熱量に対して効率よく飽和水蒸気、または過熱蒸気を発生させることができず、省電力において問題があった。また、発生させた飽和水蒸気または過熱蒸気を噴出口2から噴出させる際の音が大きく、これによって家庭での使用などにおいて耳障りな音の発生という問題が生じる。
【0008】
本発明は上記の点に鑑みなされたものであり、与えられた熱量に対し効率よく飽和水蒸気または過熱蒸気を発生し、またこれら飽和蒸気または過熱蒸気を噴出する際の、耳障りな音の発生を抑えた蒸気発生装置を提供することを目的とする。
【0009】
【課題を解決するための手段】
上記目的を達成するために本発明は、飽和水蒸気または過熱蒸気を発生させるための水を流す管路を、ストレートパイプではなく断面が波型であるフレキシブルパイプとした。
【0010】
この構成によれば、管路の表面積が大きくなりヒータからの熱量を効率よく水に伝えることができ、飽和水蒸気または過熱蒸気の発生効率の向上が可能になる。また、管路を流れる水に対する抵抗が増加することにより、流速を低減させることができる。これにより水の蒸発位置が均一化され、安定して蒸発させることができるようになり噴出音の抑制が可能となる。
【0011】
また、本発明では、前記飽和水蒸気発生装置と、前記過熱蒸気発生装置が、一体に形成されているものとした。
【0012】
この構成によれば、部品の表面積が小さくなるので、熱の放散を少なくすることができる。また、これらを各々別個の装置として設ける必要がないので、部品点数を削減することが可能である。その結果、蒸気発生装置のエネルギー効率を向上することが可能となる。また、コストダウンや構造の簡素化、部品占有スペースの低減が可能となる。
【0013】
また、本発明では、前記管路内にコイルを装着させた。
【0014】
この構成によれば、前記管路を流れる水の流速を低減することができる。また、水の温度差も低減することができる。これらによって前記管路の波型形状のみの場合に加えて、さらなる蒸発音の抑制に効果を発揮することが可能となる。
【0015】
また、本発明では、前記管路内に金属メッシュを装着した。
【0016】
この構成によれば、前記管路を流れる水の流速を低減することができる。また、水の温度差も低減することができる。これらによって前記管路の波型形状のみの場合に加えて、さらなる蒸発音の抑制に効果を発揮することが可能となる。
【0017】
【発明の実施の形態】
以下、本発明の実施形態を図に基づき説明する。図1は、第1の実施形態に係る加熱調理器の概略断面図である。図1において、水は給水手段20から蒸気発生装置1へ送り込まれ、飽和水蒸気または過熱蒸気となり加熱室10に放出される。給水手段20は貯水タンクと給水ポンプ、そしてそれらを制御する装置で構成され、給水量を調節して給水することができる。蒸気発生装置1は水パイプ3とヒータ4で構成され、熱効率を上げるため周囲を断熱材(図示せず)で覆って使用する。
【0018】
給水手段20から送り込まれた水は水パイプ3を通り、ヒータ4によって加熱され飽和水蒸気または過熱蒸気となって噴出口2から加熱室10に至る。ヒータ4は、下述するように、シーズヒータ5をアルミ6で鋳込んだものをここでは用いている。アルミ中に熱電対またはサーミスタなどの温度検知手段を取り付け、それによってヒータ温度を制御する。
【0019】
図2は、その蒸気発生装置1を水パイプ3の長さ方向から見た横断面図である。ヒータ4はシーズヒータ5と鋳込みアルミによって、水パイプ3に効率よく熱量を伝える構成としている。給水手段20から供給される水は、水パイプ3を経てヒータ4中で加熱され、最終的には噴出口2から飽和水蒸気または過熱蒸気となって、加熱室10へと送り込まれる。
【0020】
水パイプ3には、断面が波型のフレキシブルパイプが使われ、水パイプ3がヒータ4とより大きな面積で接触するようにしている。また、水パイプ3と給水手段20との接続にはフレキシブルパイプ用のセージロック(図示せず)が用いられ、水漏れのない構成としている。
【0021】
図3は、第2の実施形態を示し、水パイプ3内に、適度な流水抵抗を与える部材を装着した蒸気発生装置1を水パイプ3の長さ方向から見た横断面図である。
すなわち、水パイプ3内には、コイルバネ7が装着されている。
【0022】
この構成により、水パイプ3を流れる水の流速が低減され、水の蒸発音を抑えることが可能となるとともに、均一に水を蒸発させて蒸気の安定供給が可能となる。なお、コイルバネ7は一例であり、適度な流水抵抗を与える部材であれば、金属メッシュのようなものでも同様の効果を得ることができる。
【0023】
上記のように本発明の実施形態を示したが、この他、発明の主旨を逸脱しない範囲で種々の変更を加えて実施することができる。例えば、加熱室を設けず、噴出口にノズルを装着し被加熱物に直に噴出する構成も可能である。
【0024】
【発明の効果】
本発明の蒸気発生装置によれば、流水を加熱する管路を波型としたことにより、与えた熱量に対して効率よく飽和蒸気または過熱蒸気を発生させることができる。その結果、飽和蒸気または過熱蒸気による優れた加熱効率を実現することが可能である。
【0025】
また、管路を流れる水の温度差の低減、流速の低減により蒸気噴出音を軽減することが可能となる。
【図面の簡単な説明】
【図1】本発明の第1の実施形態に係る蒸気発生装置を備えた加熱調理気の概略構成図である。
【図2】上記蒸気発生装置を水パイプの長さ方向から見た横断面図である。
【図3】本発明の第2の実施形態に係る蒸気発生装置を水パイプの長さ方向から見た横断面図である。
【図4】従来の蒸気発生装置の一例を示す斜視図である。
【符号の説明】
1 蒸気発生装置
2 噴出口
3 水パイプ
4 ヒータ
5 シーズヒータ
6 鋳込みアルミ
7 コイルバネ
10 加熱室
20 給水手段
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a saturated steam generator for heating and humidifying an object to be heated with saturated steam, or a superheated steam generator for heating, sterilizing and drying the object to be heated with superheated steam of 100 ° C. or higher.
[0002]
[Prior art]
FIG. 4 is a perspective view of a conventional steam generator. The steam generator 1 generates saturated steam by passing water supplied from a water supply tank or the like through a water pipe 3 heated by a heater 4 cast with aluminum 6 through a sheath heater 5 serving as a heat source. 2 is to spray saturated steam.
[0003]
As an application example of such a steam generator, heating of a food such as a food using saturated steam, humidification, or heating of a food such as a food by superheated steam of 100 ° C. or more in which the saturated steam is further heated. Heat cookers to perform are well known. In this cooking device, the saturated steam generated by the steam generator is further heated by the superheated steam generator to generate superheated steam. The superheated steam is supplied into a heating chamber containing the food to be cooked. When the temperature in the heating chamber reaches a predetermined temperature corresponding to the object to be cooked and the heating time suitable for the object to be cooked has elapsed, the supply of the superheated steam is stopped, and the cooking is completed.
[0004]
That is, by using the superheated steam, it is possible to prevent evaporation of water in the object to be cooked, and to cook with a moist finish. In addition, since the superheated steam has a higher thermal conductivity than air, the cooking time can be shortened, and the heating chamber becomes almost oxygen-free, so that the oxidation of the object to be cooked can be reduced.
[0005]
As for the structure of a heating cooker using such superheated steam, a type in which superheated steam is directly supplied into a heating chamber has been proposed (for example, see Patent Document 1).
[0006]
[Patent Document 1]
JP-A-9-4849
[Problems to be solved by the invention]
However, in the conventional steam generator 1, since the water pipe 3 is formed of a straight pipe, the water flow passing through the water pipe 3 is increased, and saturated steam or superheated steam is efficiently generated with respect to the amount of heat given by the heater 4. And there was a problem in power saving. In addition, the sound generated when the generated saturated steam or superheated steam is jetted from the jet port 2 is loud, which causes a problem of generating harsh sounds when used at home.
[0008]
The present invention has been made in view of the above points, and efficiently generates saturated steam or superheated steam for a given amount of heat, and suppresses generation of unpleasant noise when jetting these saturated steam or superheated steam. An object of the present invention is to provide a suppressed steam generator.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a pipe through which water for generating saturated steam or superheated steam flows is not a straight pipe but a flexible pipe having a corrugated cross section.
[0010]
According to this configuration, the surface area of the pipeline increases, and the amount of heat from the heater can be efficiently transmitted to the water, and the efficiency of generating saturated steam or superheated steam can be improved. In addition, the flow velocity can be reduced by increasing the resistance to water flowing through the pipeline. As a result, the evaporation position of the water is made uniform, the water can be stably evaporated, and the emission noise can be suppressed.
[0011]
Further, in the present invention, the saturated steam generator and the superheated steam generator are formed integrally.
[0012]
According to this configuration, since the surface area of the component is reduced, heat dissipation can be reduced. In addition, since it is not necessary to provide these as separate devices, the number of parts can be reduced. As a result, the energy efficiency of the steam generator can be improved. Further, it is possible to reduce costs, simplify the structure, and reduce the space occupied by components.
[0013]
In the present invention, a coil is mounted in the pipe.
[0014]
According to this configuration, the flow velocity of the water flowing through the pipe can be reduced. Also, the temperature difference of water can be reduced. Thus, in addition to the case where only the corrugated shape of the conduit is used, it is possible to exhibit an effect of further suppressing the evaporation sound.
[0015]
In the present invention, a metal mesh is installed in the pipe.
[0016]
According to this configuration, the flow velocity of the water flowing through the pipe can be reduced. Also, the temperature difference of water can be reduced. Thus, in addition to the case where only the corrugated shape of the conduit is used, it is possible to exhibit an effect of further suppressing the evaporation sound.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic sectional view of the heating cooker according to the first embodiment. In FIG. 1, water is sent from a water supply means 20 to a steam generator 1 and becomes saturated steam or superheated steam and is discharged to a heating chamber 10. The water supply means 20 is composed of a water storage tank, a water supply pump, and a device for controlling them, and can supply water by adjusting the amount of water supply. The steam generator 1 is composed of a water pipe 3 and a heater 4, and is used with its surroundings covered with a heat insulating material (not shown) to increase thermal efficiency.
[0018]
The water fed from the water supply means 20 passes through the water pipe 3 and is heated by the heater 4 to become saturated steam or superheated steam, and reaches the heating chamber 10 from the jet port 2. As described below, the heater 4 is formed by casting a sheath heater 5 of aluminum 6. A temperature detecting means such as a thermocouple or a thermistor is mounted in aluminum to control the heater temperature.
[0019]
FIG. 2 is a cross-sectional view of the steam generator 1 as viewed from the length direction of the water pipe 3. The heater 4 is configured to efficiently transmit heat to the water pipe 3 by means of a sheathed heater 5 and cast aluminum. The water supplied from the water supply means 20 is heated in the heater 4 via the water pipe 3, and finally is sent into the heating chamber 10 as saturated steam or superheated steam from the jet port 2.
[0020]
As the water pipe 3, a flexible pipe having a corrugated cross section is used so that the water pipe 3 contacts the heater 4 with a larger area. In addition, a sage lock (not shown) for a flexible pipe is used to connect the water pipe 3 and the water supply means 20, so that there is no water leakage.
[0021]
FIG. 3 shows the second embodiment, and is a cross-sectional view of the steam generator 1 in which a member for providing an appropriate resistance to flowing water is mounted in the water pipe 3 as viewed from the length direction of the water pipe 3.
That is, the coil spring 7 is mounted in the water pipe 3.
[0022]
With this configuration, the flow velocity of the water flowing through the water pipe 3 is reduced, so that the sound of water evaporation can be suppressed, and the water can be uniformly evaporated to provide a stable supply of steam. In addition, the coil spring 7 is an example, and a similar effect can be obtained by a member such as a metal mesh as long as it is a member that gives appropriate flowing water resistance.
[0023]
Although the embodiment of the present invention has been described above, other various modifications can be made without departing from the gist of the present invention. For example, it is also possible to adopt a configuration in which a nozzle is attached to an ejection port and a jet is directly ejected to an object to be heated without providing a heating chamber.
[0024]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the steam generator of this invention, since the pipe which heats flowing water was made into a corrugated shape, it can generate | occur | produce a saturated steam or superheated steam efficiently with respect to the given heat quantity. As a result, it is possible to realize excellent heating efficiency by using saturated steam or superheated steam.
[0025]
In addition, it is possible to reduce steam jet noise by reducing the temperature difference and the flow velocity of the water flowing through the pipeline.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a heating cooking air provided with a steam generator according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of the steam generator as viewed from a length direction of a water pipe.
FIG. 3 is a cross-sectional view of a steam generator according to a second embodiment of the present invention as viewed from a length direction of a water pipe.
FIG. 4 is a perspective view showing an example of a conventional steam generator.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 steam generator 2 jet port 3 water pipe 4 heater 5 sheathed heater 6 cast aluminum 7 coil spring 10 heating chamber 20 water supply means

Claims (4)

加熱された管路に水を通過させることにより飽和水蒸気を発生させる蒸気発生装置において、前記管路の長さ方向の断面を、波型としたことを特徴とする蒸気発生装置。What is claimed is: 1. A steam generator for generating saturated steam by passing water through a heated pipeline, wherein a cross section in the length direction of the pipeline is corrugated. 加熱された管路に水を通過させることにより過熱蒸気を発生させる蒸気発生装置において、前記管路の長さ方向の断面を、波型としたことを特徴とする蒸気発生装置。A steam generator for generating superheated steam by passing water through a heated pipe, wherein a cross section of the pipe in a longitudinal direction is corrugated. 前記管路内にコイルを装着したことを特徴とする請求項1又は2に記載の蒸気発生装置。The steam generator according to claim 1, wherein a coil is mounted in the conduit. 前記管路内に金属メッシュを装着したことを特徴とする請求項1又は2に記載の蒸気発生装置。The steam generator according to claim 1, wherein a metal mesh is mounted in the conduit.
JP2003034102A 2003-02-12 2003-02-12 Steam generator Pending JP2004245467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Country Status (1)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006130295A (en) * 2004-11-05 2006-05-25 Samsung Electronics Co Ltd Steam generator and washing machine including it
KR100747364B1 (en) * 2006-02-13 2007-08-07 동양매직 주식회사 A steam generator
CN1818461B (en) * 2006-03-16 2010-04-21 沙静明 Machining method of electric heating instant steaming generator
JP2012187173A (en) * 2011-03-09 2012-10-04 Panasonic Corp Rice cooker
CN103411309A (en) * 2013-07-15 2013-11-27 大连美莱达科技有限公司 Electrical heating cast aluminum heat exchanger
EP2896882A1 (en) * 2014-01-15 2015-07-22 Electrolux Appliances Aktiebolag Steam generator and household appliance

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006130295A (en) * 2004-11-05 2006-05-25 Samsung Electronics Co Ltd Steam generator and washing machine including it
KR100747364B1 (en) * 2006-02-13 2007-08-07 동양매직 주식회사 A steam generator
CN1818461B (en) * 2006-03-16 2010-04-21 沙静明 Machining method of electric heating instant steaming generator
JP2012187173A (en) * 2011-03-09 2012-10-04 Panasonic Corp Rice cooker
CN103411309A (en) * 2013-07-15 2013-11-27 大连美莱达科技有限公司 Electrical heating cast aluminum heat exchanger
EP2896882A1 (en) * 2014-01-15 2015-07-22 Electrolux Appliances Aktiebolag Steam generator and household appliance
WO2015106980A1 (en) * 2014-01-15 2015-07-23 Electrolux Appliances Aktiebolag Steam generator and household appliance
AU2019201222B2 (en) * 2014-01-15 2020-09-24 Electrolux Appliances Aktiebolag Steam Generator and Household Appliance
EP4063730A1 (en) * 2014-01-15 2022-09-28 Electrolux Appliances Aktiebolag Steam oven having a l-shaped steam generator
US11493201B2 (en) 2014-01-15 2022-11-08 Electrolux Appliances Aktiebolag Steam generator and household appliance

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