JP2013057482A - Induction heating type liquid heater and induction heating type liquid heating apparatus - Google Patents

Induction heating type liquid heater and induction heating type liquid heating apparatus Download PDF

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JP2013057482A
JP2013057482A JP2011197124A JP2011197124A JP2013057482A JP 2013057482 A JP2013057482 A JP 2013057482A JP 2011197124 A JP2011197124 A JP 2011197124A JP 2011197124 A JP2011197124 A JP 2011197124A JP 2013057482 A JP2013057482 A JP 2013057482A
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liquid
pipe
induction heating
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Ikuo Hanazono
幾男 花園
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NIPPON SUPER INDUSTRY CO Ltd
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Abstract

PROBLEM TO BE SOLVED: To improve heating efficiency by enlarging the surface area of a heat generator.SOLUTION: A heat generation coil that is spirally wound is inserted to a pipe. A liquid channel is disposed between the pipe and the heat generation coil. An induction coil is spirally wound on the outer circumference of the pipe. A heat-generation coil in the pipe generates heat according to induction heating when a high-frequency current flows through an induction coil, and liquid in the liquid channel is heated. Two or more heat-generation coils may be inserted concentrically to the pipe, or one long heat generation coil may be disposed in the pipe while being folded a plurality of times at both axial end parts of the pipe. A liquid inlet is disposed on one axial end of the pipe, and a liquid outlet is disposed on the other end. The liquid inlet and the liquid outlet lead to the liquid channel in the pipe to heat the liquid supplied from the liquid inlet while the liquid is output from the liquid outlet.

Description

本発明は高周波誘導加熱を利用して液体を加熱（加温）する誘導加熱式液体加熱器とそれを利用した誘導加熱式液体加熱装置に関する。   The present invention relates to an induction heating type liquid heater for heating (heating) a liquid using high frequency induction heating and an induction heating type liquid heating apparatus using the same.

液体の加熱には各種加熱器が使用されており、その一つとして高周波誘導加熱を利用するものが知られている（特許文献１、２）。   Various heaters are used for heating the liquid, and one of them uses high-frequency induction heating (Patent Documents 1 and 2).

特許文献１記載の誘導加熱温水器は、誘導加熱を利用するものではあるが、水用の配管とガス用の配管を必要としたガス温水器の施工上の面倒を改善するものであり、誘導加熱による加熱効率の向上を目的とするものではない（段落番号：０００３、０００４）。   Although the induction heating water heater described in Patent Document 1 uses induction heating, it is intended to improve the construction of a gas water heater that requires water piping and gas piping. It is not intended to improve the heating efficiency by heating (paragraph numbers: 0003, 0004).

特許文献２の誘導加熱温水器は、誘導加熱を利用するものではあるが、従来は抑制の対象とされていたコイル外側の磁束を熱交換の対象として利用するものである（段落番号：００４０）。   The induction heating water heater of Patent Document 2 uses induction heating, but uses a magnetic flux outside the coil, which has been conventionally controlled, as a heat exchange target (paragraph number: 0040). .

特開平５−３０２７５５号公報JP-A-5-302755 特開平８−９４１７６号公報JP-A-8-94176

本発明の解決課題は、発熱体の表面積を大きくして加熱効率を高めた誘導加熱式液体加熱器とそれを利用した誘導加熱式液体加熱装置を提供することにある。   The problem to be solved by the present invention is to provide an induction heating liquid heater in which the heating surface area is increased by increasing the surface area of the heating element and an induction heating liquid heating apparatus using the induction heating liquid heater.

本発明の誘導加熱式液体加熱器は、誘導コイルに高周波電流を流すと発熱して液体を加熱できるようにした誘導加熱式液体加熱器において、螺旋状に巻かれた発熱コイルがパイプ内に挿入され、パイプと発熱コイルの間に液体通路が形成され、パイプの外周に加熱コイル（誘導コイル）が螺旋状に巻かれ、誘導コイルに高周波電流が流れると電磁誘導加熱によりパイプ内の発熱コイルが発熱し、前記液体通路内の液体が加熱されるようにしたものである。発熱コイルは二本以上の任意本数をパイプ内に挿入することができる。この場合、多数本の発熱コイルを同心円状に平行に挿入することも、長尺の１本の発熱コイルをパイプの軸方向両端部で複数回折り返して挿入することもできる。   The induction heating type liquid heater of the present invention is an induction heating type liquid heater that generates heat when a high-frequency current is passed through the induction coil so that the liquid can be heated. A liquid passage is formed between the pipe and the heating coil, and a heating coil (induction coil) is spirally wound around the outer periphery of the pipe. When a high-frequency current flows through the induction coil, the heating coil in the pipe is caused by electromagnetic induction heating. Heat is generated, and the liquid in the liquid passage is heated. Any number of two or more heating coils can be inserted into the pipe. In this case, a large number of heating coils can be inserted concentrically and in parallel, or a single long heating coil can be inserted back and forth at both ends in the axial direction of the pipe.

本発明の誘導加熱式液体加熱器は、パイプの軸方向一端に液体入口が、他端に液体出口が設けられ、それら液体入口と液体出口はパイプ内の液体通路と連通するものである。   In the induction heating type liquid heater of the present invention, a liquid inlet is provided at one end in the axial direction of a pipe, and a liquid outlet is provided at the other end. The liquid inlet and the liquid outlet communicate with a liquid passage in the pipe.

本発明の誘導加熱式液体加熱装置は、誘導コイルに高周波電流を流すと発熱して液体を加熱できるようにした誘導加熱式液体加熱器を用いた誘導加熱式液体加熱装置において、前記誘導加熱式液体加熱器と、誘導加熱式液体加熱器の誘導コイルに高周波電流を供給する高周波発振器を備えたものである。この場合必要に応じて、誘導コイルと高周波発振器の間にマッチングトランスを入れて両者のインピーダンスをマッチングさせて発熱効率を高めことができる。   The induction heating type liquid heating apparatus of the present invention is an induction heating type liquid heating apparatus using an induction heating type liquid heater that generates heat when a high frequency current is passed through an induction coil so that the liquid can be heated. A liquid heater and a high frequency oscillator for supplying a high frequency current to the induction coil of the induction heating type liquid heater are provided. In this case, if necessary, a matching transformer can be inserted between the induction coil and the high-frequency oscillator to match the impedances of the induction coil and the heat generation efficiency.

本発明の誘導加熱式液体加熱器及び誘導加熱式液体加熱装置は次のような効果がある。
（１）螺旋状に巻かれた発熱コイルがパイプ内に挿入され、そのパイプの外周に誘導コイルが巻かれているので構成が簡潔であり、パイプとその中に挿入する発熱コイルを長くするだけで発熱面積を広くすることができ、パイプ内で液体を効率よく加熱することができる。
（２）パイプに液体通路と連通する液体入口と液体出口を備えているので、液体を液体入口から供給すれば、パイプ内の液体通路を通過して液体出口から出る間（パイプ内を通過する間）に発熱コイルの発熱により加熱される。
（３）誘導コイルに高周波発振器から高周波電圧を印加すれば、誘導コイルの電磁誘導作用により発熱コイルが加熱され、パイプ内を通過する液体が加熱される。 The induction heating type liquid heater and the induction heating type liquid heating apparatus of the present invention have the following effects.
(1) Since the helically wound heating coil is inserted into the pipe and the induction coil is wound around the outer circumference of the pipe, the configuration is simple, and only the pipe and the heating coil inserted therein are lengthened. The heating area can be widened and the liquid can be efficiently heated in the pipe.
(2) Since the pipe has a liquid inlet and a liquid outlet communicating with the liquid passage, if the liquid is supplied from the liquid inlet, it passes through the liquid passage in the pipe and exits from the liquid outlet (passes through the pipe). In the meantime, it is heated by the heat generated by the heating coil.
(3) When a high frequency voltage is applied to the induction coil from the high frequency oscillator, the heating coil is heated by the electromagnetic induction action of the induction coil, and the liquid passing through the pipe is heated.

本発明の誘導加熱式液体加熱器の斜視図。The perspective view of the induction heating type liquid heater of this invention. （ａ）は本発明の誘導加熱式液体加熱器の縦断面図、（ｂ）は（ａ）のＡ−Ａ断面図。(A) is a longitudinal cross-sectional view of the induction heating type liquid heater of this invention, (b) is AA sectional drawing of (a).

（誘導加熱式液体加熱器の実施形態）
本発明の誘導加熱式液体加熱器の実施形態の一例を、図面を参照して説明する。図示した誘導加熱式液体加熱器は、螺旋状に巻かれた発熱コイル１がパイプ２内に挿入され、パイプ２と発熱コイル１の間に液体通路３が形成され、パイプ２の外周に加熱コイル（誘導コイル）４がパイプ２の軸方向に螺旋状に巻かれ、誘導コイル４に高周波電流が流れると電磁誘導加熱によりパイプ２内の発熱コイル１が発熱し、前記液体通路３内の液体が加熱されるようにしてある。パイプ２の軸方向一端に液体入口５が、他端に液体出口６が設けられ、それら液体入口５と液体出口６はパイプ２内の液体通路３と連通している。 (Embodiment of induction heating type liquid heater)
An example of an embodiment of the induction heating type liquid heater of the present invention will be described with reference to the drawings. In the illustrated induction heating type liquid heater, a heating coil 1 wound in a spiral shape is inserted into a pipe 2, a liquid passage 3 is formed between the pipe 2 and the heating coil 1, and a heating coil is formed around the pipe 2. When the (induction coil) 4 is spirally wound in the axial direction of the pipe 2 and a high frequency current flows through the induction coil 4, the heating coil 1 in the pipe 2 generates heat by electromagnetic induction heating, and the liquid in the liquid passage 3 flows. It is supposed to be heated. A liquid inlet 5 is provided at one axial end of the pipe 2 and a liquid outlet 6 is provided at the other end. The liquid inlet 5 and the liquid outlet 6 communicate with the liquid passage 3 in the pipe 2.

パイプ２には、例えば、硬質樹脂製の絶縁性パイプを使用するのが適する。その長さや直径等は用途に合わせて選択できるが、一例としては、外径φ４８ｍｍ、内径φ４０ｍｍ、長さ２００ｍｍのものを使用することができる。   For the pipe 2, for example, it is suitable to use an insulating pipe made of hard resin. The length, diameter, and the like can be selected in accordance with the application, but as an example, one having an outer diameter of φ48 mm, an inner diameter of φ40 mm, and a length of 200 mm can be used.

前記発熱コイル１には市販の螺旋状のニクロム線を使用することができるが、螺旋状に巻いた電熱線であれば他の材質、構造のコイルも使用でき、独自に製作することもできる。その線径、巻き径、長さ等は用途に合わせて設計することができる。材質はステンレス、金、銀、銅、アルミといった熱伝導率の高い他のものとすることもできる。一例としては、線径φ１ｍｍ、コイル径φ８ｍｍの線材を螺旋状に巻いたものを二本以上使用し、それらを前記パイプ２内に同心円状に配置してパイプ２の軸方向に挿入してある。   A commercially available spiral nichrome wire can be used for the heating coil 1, but a coil of another material and structure can be used as long as it is a spirally wound heating wire. The wire diameter, winding diameter, length, etc. can be designed according to the application. The material may be other materials having high thermal conductivity such as stainless steel, gold, silver, copper, and aluminum. As an example, two or more spirally wound wires with a wire diameter of φ1 mm and a coil diameter of φ8 mm are used, and these are arranged concentrically in the pipe 2 and inserted in the axial direction of the pipe 2. .

発熱コイル１には長尺の１本の発熱コイルを使用し、それをパイプ２内に挿入し、パイプ２の軸方向両端部で複数回折り返してパイプ内に配置することもできる。   It is also possible to use one long heating coil as the heating coil 1, insert it into the pipe 2, and fold it back at both ends in the axial direction of the pipe 2 so as to be arranged in the pipe.

前記発熱コイル１を挿入したパイプ２の軸方向両端開口部はキャップ７、８で閉塞してある。一方のキャップ７には液体入口５が、他方のキャップ８には液体出口６が設けられ、液体入口５、液体出口６はパイプ２内の液体通路３内に連通している。キャップ７、８の寸法も任意とすることができるが、一例として、外径φ６０ｍｍ、液体入口５、液体出口６の内径φ２０ｍｍ、外径φ２６ｍｍのものを使用してある。   Both ends in the axial direction of the pipe 2 into which the heat generating coil 1 is inserted are closed with caps 7 and 8. One cap 7 is provided with a liquid inlet 5, and the other cap 8 is provided with a liquid outlet 6. The liquid inlet 5 and the liquid outlet 6 communicate with the liquid passage 3 in the pipe 2. The caps 7 and 8 can be of any size, but as an example, those having an outer diameter of 60 mm, a liquid inlet 5 and an inner diameter of the liquid outlet 6 of 20 mm, and an outer diameter of 26 mm are used.

前記誘導コイル４には、高周波誘導加熱に適した材質製のものを使用でき、一例としてリッツ線を使用することができる。図１、図２の場合は巻き数２５回（２５ターン：２５Ｔ）としてある。誘導コイル４は他の材質、構造のものであってもよい。誘導コイル４は誘導加熱の効率を高める上で密巻きするのが望ましい。   The induction coil 4 can be made of a material suitable for high-frequency induction heating, and a litz wire can be used as an example. In the case of FIGS. 1 and 2, the number of windings is 25 (25 turns: 25T). The induction coil 4 may be made of other materials and structures. The induction coil 4 is preferably tightly wound to increase the efficiency of induction heating.

本発明の誘導加熱式液体加熱器では、誘導コイル４に高周波電流を流すことにより、発熱コイル２に磁界が生じ、渦電流が流れて発熱する。   In the induction heating type liquid heater of the present invention, when a high frequency current is passed through the induction coil 4, a magnetic field is generated in the heating coil 2, and an eddy current flows to generate heat.

（誘導加熱式液体加熱装置の実施形態）
本発明の誘導加熱式液体加熱装置は、前記実施形態の誘導加熱式液体加熱器のパイプ２内の液体通路３に液体を流し、高周波発振器ＲＦから誘導コイル４に高周波電流を流すと、発熱コイル１に磁界が生じ、渦電流が流れて発熱し、その熱で液体通路３内を流れる液体が加熱されて温水になるようにしてある。液体通路３内の液体は、一時的に流れを中断して間欠的に流れるようにすることもできる。高周波発振器ＲＦには各種のものを使用可能であるが、例えば、富士電機株式会社製のＨＦＲ５．０ＣＫ（５ｋＷ、３０ｋＨｚ）を用いることができる。高周波発振器ＲＦと誘導コイル４の間にはマッチングトランスＭＴを入れて、両者のインピーダンスをマッチングさせて、高周波発振器ＲＦから出力される高周波電流が効率良く誘導コイル４に流れるようにするのが望ましい。 (Embodiment of induction heating type liquid heating apparatus)
In the induction heating type liquid heating apparatus of the present invention, when a liquid is supplied to the liquid passage 3 in the pipe 2 of the induction heating type liquid heater of the above embodiment and a high frequency current is supplied from the high frequency oscillator RF to the induction coil 4, the heating coil A magnetic field is generated in 1 and an eddy current flows to generate heat, and the liquid flowing in the liquid passage 3 is heated by the heat to become hot water. The liquid in the liquid passage 3 can be temporarily interrupted to flow intermittently. Various types of high-frequency oscillators RF can be used. For example, HFR5.0CK (5 kW, 30 kHz) manufactured by Fuji Electric Co., Ltd. can be used. It is desirable to insert a matching transformer MT between the high-frequency oscillator RF and the induction coil 4 so as to match the impedances of the two so that a high-frequency current output from the high-frequency oscillator RF flows through the induction coil 4 efficiently.

本発明の誘導加熱式液体加熱器は、湯沸かし器の熱交換機、温泉の加温、農業用ハウス用の温水といった、あらゆる用途の温水器として使用することができる。   The induction heating type liquid heater of the present invention can be used as a water heater for all uses such as a heat exchanger for a water heater, warming a hot spring, and warm water for an agricultural house.

１ 発熱コイル
２ ホース
３ 液体通路
４ 加熱（誘導）コイル
５ 液体入口
６ 液体出口
７、８ キャップ
ＭＴ マッチングトランス
ＲＦ 高周波発振器 1 Heating coil 2 Hose 3 Liquid passage 4 Heating (induction) coil 5 Liquid inlet 6 Liquid outlet 7, 8 Cap MT Matching transformer RF High frequency oscillator

Claims (5)

誘導コイルに高周波電流を流すと発熱して液体を加熱できるようにした誘導加熱式液体加熱器において、
螺旋状に巻かれた発熱コイルがパイプ内に挿入され、パイプと発熱コイルの間に液体通路が形成され、パイプの外周に誘導コイルが螺旋状に巻かれ、誘導コイルに高周波電流が流れると電磁誘導加熱によりパイプ内の発熱コイルが発熱し、前記液体通路内の液体が加熱されるようにしたことを特徴とする誘導加熱式液体加熱器。 In an induction heating type liquid heater that can heat a liquid by generating heat when a high frequency current is passed through the induction coil,
A helically wound heating coil is inserted into the pipe, a liquid passage is formed between the pipe and the heating coil, an induction coil is spirally wound around the outer periphery of the pipe, and a high-frequency current flows through the induction coil. An induction heating type liquid heater, wherein a heating coil in a pipe generates heat by induction heating, and the liquid in the liquid passage is heated. 請求項１記載の誘導加熱式液体加熱器において、二本以上の発熱コイルが、パイプ内に同心円状に挿入されたことを特徴とする誘導加熱式液体加熱器。   2. The induction heating liquid heater according to claim 1, wherein two or more heating coils are concentrically inserted into the pipe. 請求項１記載の誘導加熱式液体加熱器において、長尺の１本の発熱コイルが、パイプの軸方向両端部で複数回折り返してパイプ内に設けられたことを特徴とする誘導加熱式液体加熱器。   2. The induction heating type liquid heater according to claim 1, wherein one long heating coil is provided in the pipe by being bent back and forth at both ends in the axial direction of the pipe. vessel. 請求項１ないし請求項３のいずれか１項に記載の誘導加熱式液体加熱器において、パイプの軸方向一端に液体入口が、他端に液体出口が設けられ、液体入口と液体出口はパイプ内の液体通路と連通することを特徴とする誘導加熱式液体加熱器。   The induction heating type liquid heater according to any one of claims 1 to 3, wherein a liquid inlet is provided at one end in the axial direction of the pipe, a liquid outlet is provided at the other end, and the liquid inlet and the liquid outlet are disposed in the pipe. An induction heating type liquid heater characterized by communicating with the liquid passage. 誘導コイルに高周波電流を流すと発熱して液体を加熱できるようにした誘導加熱式液体加熱器を用いた誘導加熱式液体加熱装置において、
前記誘導加熱式液体加熱器が請求項１ないし請求項４のいずれか１項に記載の誘導加熱式液体加熱器であり、
前記誘導加熱式液体加熱器の誘導コイルに高周波電流を供給する高周波発振器を備えたことを特徴とする誘導加熱式液体加熱装置。 In an induction heating type liquid heating apparatus using an induction heating type liquid heater that generates heat when a high-frequency current is passed through the induction coil to heat the liquid,
The induction heating liquid heater is the induction heating liquid heater according to any one of claims 1 to 4,
An induction heating type liquid heating apparatus comprising a high frequency oscillator for supplying a high frequency current to an induction coil of the induction heating type liquid heater.
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CN104344540B (en) * 2013-07-29 2017-11-14 美的集团股份有限公司 Electromagnetic induction heater and there is its water dispenser
CN103940072A (en) * 2014-04-30 2014-07-23 徐荣兰 Electric water heater
CN105546805A (en) * 2016-02-05 2016-05-04 赵伟 Liquid heating device
CN106196617A (en) * 2016-06-29 2016-12-07 珠海格力电器股份有限公司 Control device, water heater and the control method thereof of a kind of water heater
WO2021020527A1 (en) * 2019-07-30 2021-02-04 幸春 宮村 Method for manufacturing heat-generating element, heat-generating element, and heating unit
JPWO2021020527A1 (en) * 2019-07-30 2021-11-18 幸春 宮村 Heating element manufacturing method, heating element and heating unit
CN111726907A (en) * 2020-06-24 2020-09-29 沈阳工业大学 Electromagnetic induction heating device based on double-layer iron pipe structure and operation method
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