JP4021341B2

JP4021341B2 - heater

Info

Publication number: JP4021341B2
Application number: JP2003040240A
Authority: JP
Inventors: 昭文山口
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 2003-02-18
Filing date: 2003-02-18
Publication date: 2007-12-12
Anticipated expiration: 2023-02-18
Also published as: JP2004251494A

Description

【０００１】
【発明の属する技術分野】
本発明は、テーブルの天板の下方に配置される、発熱体を内蔵した暖房機に関するものである。
【０００２】
【従来の技術】
机、テーブル等の天板の下方に発熱体を設け、テーブルを囲んで着座する人々の足元を暖める暖房器具（以下、暖房機という）は、堀こたつ又はそれに類似の暖房装置として従来から用いられている。このような暖房機の第１の従来例（例えば、特許文献１を参照）では、テーブルの天板（以下、テーブル天板）を支える中空の支柱内の上部空間に電気ヒーターなどの発熱体を内蔵している。支柱の、発熱体より下部に開口を形成し、発熱体からの輻射熱が直接床面に向けて照射されるように角度を設定した下向きのルーバーを開口に設けている。ルーバーの内側には、中央部から前記ルーバーに向かって下向きに傾斜した傾斜面が設けられ、この傾斜面とテーブルの天板との間にファンが設けられている。この構成により、発熱体からの輻射熱は直接床面に照射されるとともに、ファンによって温風が床面に向けて吐出される。
【０００３】
第２の従来例（例えば、特許文献２を参照）の暖房機では、テーブル天板を支持する中空の支柱の内部に発熱体を設け、発熱体の上方に略円弧状の反射板を設けている。中空の支柱の側部には内側から外側にむけて下降する傾斜面を有するルーバーを設けて発熱体からの光が着座する人々の目に直接入るのを防止するとともに発熱体の輻射熱を床面に向けて放射させている。
第３の従来例の暖房機を、縦方向の断面を示す図８を参照して説明する。テーブル６０の天板６１は台板６２に固定された断面が正方形の筒状の支柱５１により支持されている。支柱５１の内部には中央支持体５３が設けられている。中央支持体５３に２本の棒状の発熱体５４が縦に配置されている。支柱５１の上部に複数の吸入孔５２が設けられ、下部に複数の吐出口５６が設けられている。支柱５１の前記上部及び下部除く部分に多数の孔６５が形成されている。中央支持体５３にも多数の孔６７が形成されている。支柱５１の内部の上部にはファン５０が設けられ、吸入口５２から矢印で示すように空気を吸入して発熱体５４で温風にして吐出口５６から吐出させている。発熱体５４からの輻射熱は孔６７及び６５を通って外部へ放射される（特許文献３を参照）。
【０００４】
【特許文献１】
実公昭６４−５２９号公報
【特許文献２】
実公平１−２６９６１号公報
【特許文献３】
実公平８−１４１１号公報
【０００５】
【発明が解決しようとする課題】
特許文献１あるいは特許文献２に記載の従来例では、支柱内の中央部から外側面に向けて下降する傾斜面を有するルーバーを設けているので、発熱体からの輻射熱は水平方向ではなく下向きに放射される。そのため支柱の外側の空間では上下方向の熱輻射が不均一になる。温風も下向きのルーバーによって下向きに吐出されるため、上部の温度に比べて下部の温度が上がりやすく、不均一になる。
特許文献３に記載の従来例では、発熱体５４からの輻射熱が中央支持体５３と支柱５１の両方の孔６７，６５を通って外部の空間へ放射されるため、外部へ放射される輻射熱が減少し、暖を取る人々に与える輻射熱の効果が低い。また支柱５１の周囲の輻射熱の分布については、支柱５１の発熱体５４に近い面、すなわち図の左右方向への輻射熱は強い。しかしそれ以外の方向への輻射熱は弱い。そのため支柱５１の周囲で暖房効果が不均一になる。また、支柱５１の下部の孔５６から温風が吹き出すので、支柱５１の下端部近傍の空間に温風が集中し、暖房効果が下部に偏り不均一になる。
本発明は暖房機の周囲の暖房空間の温度分布が均一になる暖房機を提供することを目的とする。
【０００６】
【課題を解決するための手段】
本発明の暖房機は、上端にテーブル天板が取り付けられ、下端に底板が取り付けられ、テーブル天板の近傍に複数の吸入口を有し、前記底板の近傍に複数の吐出口を有し、かつ前記吸入口と前記吐出口の間に複数の孔を有する筒状の支柱、
前記テーブル天板に所定の間隔を隔てて対向し、前記テーブル天板との間に第１の空間を形成するように設けられた、複数の第１の開口部を有する内天板、
前記内天板に所定の間隔を隔てて対向し、前記内天板との間に第２の空間を形成するように前記支柱の内部空間内に設けられた、複数の第２の開口部を有する中天板、
前記底板の過熱防止のために前記底板との間に第３の空間を形成し、かつ、前記中天板との間に第１の内部空間を形成するように、前記底板に所定の間隔を隔てて対向する内底板と、
前記支柱の前記第１の内部空間の中央部に第２の内部空間を形成するように前記中天板と前記内底板との間に実質的に鉛直に配置され、前記内底板に近い部分に第３の開口部を有する第１の反射板、
長手方向が実質的に鉛直になるように前記第１の反射板に沿って前記第１の内部空間内に実質的に鉛直に設けられた棒状の発熱体、
前記発熱体に所定の間隔を隔てて前記発熱体と前記支柱の内壁面との間に設けられた第２の反射板、及び
前記第２の空間に設けられ、下方へ向かう空気流を発生する電動ファンを備え、
前記電動ファンの回転によって前記吸入口から前記第１の空間に吸入された空気を、前記第２の空間へつながる前記第１の開口部、前記第２の開口部、前記第１の内部空間を順次通過させることによって前記発熱体で加熱して前記吐出口及び前記孔から吐出させ、かつ前記第２の空間からの空気を、前記第２の内部空間において、第１の反射板で暖めながら下方に流し、前記第３の開口部および、前記吐出口から吐出させ、かつ、前記第１および第２の反射板により反射された輻射を前記孔から筒状の支柱の外へ放射させることを特徴とする。
【０００７】
本発明よれば、支柱４の側面の発熱体とほぼ同じ高さの範囲に温風と輻射熱の出る孔を形成している。また第１と第２の反射板を配置して、発熱体からの輻射熱が水平方向に出やすくしている。これにより、輻射熱は支柱の側面の上下方向の位置では均一に輻射される。支柱の下部への輻射熱が上部より少なくなるので、第２の内部空間を通過する空気流を下方の吐出口から吐出させることで、暖房空間の下部の温度の不均一が改善され暖房空間全体の温度分布を均一にできる。
前記第２の内部空間を形成する第１の反射板に複数の第４の開口部を形成したことを特徴とする。
【０００８】
前記第４の開口部の近傍に、前記第２の内部空間内で斜め上方に向かって突出する空気案内板を設けたことを特徴とする。
前記発熱体、前記発熱体に所定の間隔を隔てて設けた少なくとも１つの第１および第２の反射板を鉛直方向から所定の角度だけ傾斜させて設けたことを特徴とする。
前記所定の角度は１度から５度の範囲から選択した角度であることを特徴とする。
前記支柱は、横断面の形状が多角形の中空の筒であり、少なくとも２つの任意の側面にそれぞれ複数の吐出口を形成し、１つの発熱体の輻射熱を第１の反射板と第２の反射板により前記少なくとも２つの側壁面に形成された孔へ向けて反射するように構成したことを特徴とする。
【０００９】
【発明の実施の形態】
以下に、本発明の好適な実施の形態について、図１から図７を参照しながら説明する。
【００１０】
《実施の形態１》
本発明の実施の形態１の暖房機を図１から図４を参照して説明する。
図１は本発明の実施の形態１における暖房機の側断面図である。図２は同暖房機において、輻射熱の出る方向を矢印の熱輻射ｄで示し、温風の出る方向を矢印の空気流ａで示す側断面図である。「ｄ、ａ」と併記した矢印は輻射熱と温風の両方が出ることを示している。図３は図２のIII−III断面図であり、支柱４の周囲の輻射熱の分布を、熱輻射ｄの矢印で示している。図４は図２のIV−IV断面図であり、支柱４の周囲の温風の吹き出し方向を空気流ａの矢印で示している。
【００１１】
図１から図４において、板状のテーブル天板１は、底面が、長い辺と短い辺が交互に配された八角形の筒状の支柱４によって板状の底板２の上に支持されている。支柱４の内部はテーブル天板１にほぼ平行な３つの仕切板である、内天板５、中天板８、内底板１１によって仕切られている。テーブル天板１と内天板５の間の空間を第１の空間６と呼び、内天板５と中天板８の間の空間を第２の空間９と呼ぶ。第２の空間９にはファン２０が設けられている。ファン２０のシャフトは内天板５を貫通して、第１の空間６内に設けられたモータ２１に連結されている。モータ２１を第１の空間６に配置することにより、後で詳しく説明するように熱の影響をさけることができる。中天板８と内底板１１の間の空間を第１の内部空間３と呼び、内底板１１と底板２の間の空間を第３の空間１２と呼ぶ。第１の内部空間３は最も広く、第３の空間は最も狭い。
【００１２】
第１の空間６を囲む支柱４の壁面には複数の吸入口２２が形成されている。内天板５には複数の第１の開口部７が形成されている。中天板８には複数の第２の開口部１０が形成されている。内底板１１には開口は形成されていない。中天板８と内底板１１との間の第１の内部空間３には、支柱４の内壁面に狭い間隙を保ちつつ相互に対向する一対の内支持板１３が設けられている。各内支持板１３は幅の狭い板状部材であり、その内側面には棒状の発熱体１４を保持するための一対の保持具１５が設けられている。保持具１５には発熱体１４が長手方向が実質的に鉛直になるように保持されている。各発熱体１４から所定の間隔を隔てた支柱４の中心軸寄りの位置に一対の第１の反射板１７が実質的に鉛直に設けられている。一対の第１の反射板１７によって第１の内部空間３は３つの空間に分割され、支柱４の中心軸Ｃを含む空間である第２の内部空間１６が形成される。第１の反射板１７の下部の内底板１１に近い部分には複数の第３の開口部１８が形成されている。各発熱体１４と内支持板１３との間には、発熱体１４との間に所定の間隔を保って山状の第２の反射板１９が設けられている。支柱４の前記内支持板１３が対向している側面を除く他の側面にはそれぞれ複数の輻射熱の出口２７と温風の吐出口２３が形成されている。以上のように構成された暖房機について、以下、図２から図４を参照してその動作を説明する。
【００１３】
発熱体１４及びファン２０のモータ２１に通電すると、発熱体１４が発熱するとともにファン２０が回転する。ファン２０により空気流ａが発生する。空気流ａは外部から吸入口２２を通ってファン２０の上方の第１の空間６内に導入される。導入された空気流ａは開口部７を通って第２の空間９に入る。空気流ａは支柱４の外部の上方の空気の流れである。第２の空間９内に導入された空気はファン２０によって第２の開口部１０を通って下方に送り出され、第１の内部空間３及び第２の内部空間１６内に導入される。第２の空間１６に導入された空気は第１の反射板１７に沿って下方に流れる。この空気は、発熱体１４によって加熱された第１の反射板１７に触れて加熱され、温かい空気となる。この温かい空気は第３の開口部１８及び支柱４の下部に形成されている吐出口２３を通過し図４に示すように底板２に沿って吐出される。この温かい空気により、温めたい空間である暖房空間２４の下部の空気温度が上昇する。第１の内部空間３内に導入された空気は発熱体１４によって直接加熱されて温かい空気となり出口２７から暖房空間２４へ吐出される。
【００１４】
図３に示すように各発熱体１４からの赤外線を含む輻射熱は第１の反射板１７と第２の反射板１９によって反射され、熱輻射ｄとなって複数の出口２７を通って左右それぞれ２つの方向で暖房空間２４内に輻射され、暖房空間２４を暖める。図４では、矢印ａによって温風の吐出方向を示している。
本実施例の形態によれば、図２に示すように、支柱４の下部の広い範囲に設けた出口２７から輻射熱ｄと温かい空気流ａが暖房空間２４に出るので暖房空間２４の温度分布が均一になる。温かい空気流ａは出口２７から出た後上昇するので、暖房空間２４の下部の底板２の近傍には届きにくい。しかし底板２の近傍には図４に示すように吐出口２３から温かい空気流ａが吐出されるので暖房空間２４はほぼ均一な温度になる。
【００１５】
図１に示す暖房機は、支柱４がテーブル天板１を支持する構成を有するが、図示を省略した脚によってテーブル天板を支持する構成にしてもよい。また、支柱４は八角形の底面をもつものを例に挙げたが、他の多角形の底面あるいは円形の底面のものでも同様に実施可能である。棒状の発熱体１４の数は２本に限定されるものではなく３本以上の発熱体１４を配置しても同様に実施可能である。さらに、発熱体１４は内支持板１３に固定された保持具１５により保持されている例で説明したが、保持具を内底板、中天板等の他の位置に固定しても同様に実施可能である。
【００１６】
《実施の形態２》
図５は本発明の実施の形態２における暖房機の側断面図である。図５において、図１と同じ構成要素には同じ符号を付して重複する説明は省略する。
本実施の形態の暖房機では、第１の反射板１７の長手方向において中央部付近に複数の第４の開口部３１が形成されている。各開口部３１の下端部には、第２の内部空間１６に向かって約４５°の角度で斜め上に突出するフィン３２が設けられている。その他の構成は図１に示す前記実施の形態１と同じである。
本実施の形態の暖房機では、第２の内部空間１６内に導かれた空気流の一部がフィン３２に当たって第４の開口部３１に導かれて第１の内部空間３内に流入する。第１の内部空間３に流入した空気は発熱体１４によって直接加熱され出口２７を通って暖房空間２４へと吐出される。
本実施の形態の暖房機では、第２の内部空間１６を通るときある程度温められた空気が第１の内部空間３に流入して更に加熱されるので空気の温度が高くなる。この高い温度の空気が出口２７から暖房空間２４へ吐出されるので、暖房空間２４の空気温度が高くなり、暖房効果の高い暖房機を実現することができる。
【００１７】
《実施の形態３》
図６は本発明の実施の形態３における暖房機の側断面図である。図６において、図１と同じ構成要素には同じ符号を付して重複する説明は省略する。
本実施の形態の暖房機では、内支持板１３ａを鉛直方向から１〜５度の範囲の所定の角度の傾斜をつけて設けている。そのため内支持板１３ａに設けられた第２の反射板１９と保持具１５で保持された発熱体１４及び第１の反射板１７ａも前記所定の角度傾斜する。傾斜方向は図６に示すように、内支持板１３ａの上端部は前記図１と同じ位置にあるが、下端部は支柱４の中心線Ｃに近い位置にくるような方向である。この傾斜を設けることにより、輻射熱の出射方向の水平方向に対する斜め下向きの角度が大きくなる。これにより底板２の上面近傍に達する輻射熱が強くなり、空気温度も高くなる。
本実施の形態の暖房機によると、底板２の上面近傍の輻射熱が強いので、この暖房機を囲んで着座する人の足元が特に暖かくなるという効果を奏する。
【００１８】
《実施の形態４》
図７は本発明の実施の形態４における暖房機をテーブル天板に平行な面で切った断面図である。本実施の形態の暖房機の側断面図は図１とほとんど同じであるので図１を参照して説明する。
本実施の形態では、図７に示すように、第１の反射板１７ｂの反射面を２つの放物面又は放物面に近似した面を組み合わせた形状にしている。発熱体１４を放物面の焦点近傍の所定の位置に置くことにより矢印ｄで方向を示す発熱体１４の輻射熱は中心角が約９０°の範囲に集中する。左右の２つの発熱体１４をそれぞれの反射板１７ｂの焦点近傍の所定位置に置くことにより、２つの発熱体１４の輻射熱を左右のそれぞれ中心角９０°の範囲に集中させることができる。
本実施の形態によれば、輻射熱が中心角９０°の範囲に集中するので、この範囲の暖房空間を特に有効に暖房することができる。
【００１９】
【発明の効果】
以上の各実施例で詳細に説明したように、本発明によれば、上端にテーブル天板が取り付けられ、下端に底板が取り付けられた筒状の支柱の内部空間の上部の内天板と中天板の間にファンを設け、中天板の下方の第１の内部空間に発熱体と発熱体の輻射熱を水平方向に向ける第１及び第２の反射板を設けている。この構成によって、支柱の内壁と第１の反射板との間の第２の内部空間を通過する空気は温められて暖房空間の全域及び下方へ吐出される。また、発熱体の輻射熱を第１と第２の反射板によって反射させて支柱全周の少なくとも２つの扇形の領域に放射させることができる。これにより熱輻射と温風が効率よく暖房空間を暖めることができ、暖房空間の温度分布が均一になる。また、内天板の上側に第１の空間を設け、内底板の下側に第３の空間を設けているのでテーブル天板と底板の温度上昇が防止できる。
【図面の簡単な説明】
【図１】本発明の実施の形態１における暖房機の側断面図
【図２】本発明の実施の形態１の暖房機の熱輻射および空気流の状態を示す側断面図
【図３】図２のIII−III断面図
【図４】図２のIV−IV断面図
【図５】本発明の実施の形態２における暖房機の側断面図
【図６】本発明の実施の形態３における暖房機の側断面図
【図７】本発明の実施の形態４の暖房機の熱輻射の状態を示す横断面図
【図８】従来例の暖房機の側断面図
【符号の説明】
１テーブル天板
２底板
３第１の内部空間
４支柱
５内天板
６第１の空間
７第１の開口部
８中天板
９第２の空間
１０第２の開口部
１１内底板
１２第３の空間
１３内支持板
１４発熱体
１５保持具
１６第２の内部空間
１７第１の反射板
１８第３の開口部
１９第２の反射板
２０ファン
２１モータ
２２吸入口
２３吐出口
２４暖房空間
２７出口
３１第４の開口部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heater with a built-in heating element, which is disposed below a table top.
[0002]
[Prior art]
A heater (hereinafter referred to as a heater) that heats the feet of people sitting around a table by providing a heating element below the top plate of a desk, table, etc., has been conventionally used as a heater for Hori Kotatsu or similar. ing. In the first conventional example of such a heater (for example, refer to Patent Document 1), a heating element such as an electric heater is provided in an upper space in a hollow column that supports a table top (hereinafter, table top). Built-in. An opening is formed below the heating element of the support column, and a downward louver is set in the opening so that the angle is set so that radiant heat from the heating element is irradiated directly toward the floor surface. Inside the louver, an inclined surface inclined downward from the center toward the louver is provided, and a fan is provided between the inclined surface and the top plate of the table. With this configuration, radiant heat from the heating element is directly applied to the floor surface, and warm air is discharged toward the floor surface by the fan.
[0003]
In the heater of the second conventional example (for example, see Patent Document 2), a heating element is provided inside a hollow column supporting the table top plate, and a substantially arc-shaped reflecting plate is provided above the heating element. Yes. A louver having an inclined surface that descends from the inside to the outside is provided on the side of the hollow support column to prevent light from the heating element from directly entering the eyes of the seated person and to radiate heat from the heating element to the floor surface. Radiating towards
A third conventional heater will be described with reference to FIG. 8 showing a longitudinal section. The top plate 61 of the table 60 is supported by a cylindrical column 51 having a square cross section fixed to the base plate 62. A central support 53 is provided inside the column 51. Two rod-like heating elements 54 are arranged vertically on the central support 53. A plurality of suction holes 52 are provided in the upper part of the column 51, and a plurality of discharge ports 56 are provided in the lower part. A number of holes 65 are formed in portions of the column 51 excluding the upper and lower portions. A number of holes 67 are also formed in the central support 53. A fan 50 is provided in the upper part of the column 51, and air is sucked from the suction port 52 as indicated by an arrow and is heated by the heating element 54 and discharged from the discharge port 56. Radiant heat from the heating element 54 is radiated to the outside through the holes 67 and 65 (see Patent Document 3).
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 64-529 [Patent Document 2]
Japanese Utility Model Publication 1-26961 [Patent Document 3]
Japanese Utility Model Publication No. 8-1411
[Problems to be solved by the invention]
In the conventional example described in Patent Document 1 or Patent Document 2, a louver having an inclined surface that descends from the central portion in the column toward the outer surface is provided, so that the radiant heat from the heating element is directed downward rather than horizontally. Radiated. Therefore, the heat radiation in the vertical direction becomes non-uniform in the space outside the support column. Since the warm air is also discharged downward by the downward louver, the temperature of the lower part is likely to rise compared to the temperature of the upper part, resulting in unevenness.
In the conventional example described in Patent Document 3, since the radiant heat from the heating element 54 is radiated to the external space through both the holes 67 and 65 of the central support 53 and the support column 51, the radiant heat radiated to the outside is generated. The effect of radiant heat on people who decrease and get warm is low. As for the distribution of radiant heat around the column 51, the surface near the heating element 54 of the column 51, that is, the radiant heat in the horizontal direction in the figure is strong. However, radiant heat in other directions is weak. Therefore, the heating effect becomes non-uniform around the column 51. Moreover, since warm air blows out from the hole 56 at the bottom of the support column 51, the warm air concentrates in the space near the lower end of the support column 51, and the heating effect is biased downward and uneven.
An object of this invention is to provide the heater from which the temperature distribution of the heating space around a heater becomes uniform.
[0006]
[Means for Solving the Problems]
The heater of the present invention has a table top plate attached to the upper end, a bottom plate attached to the lower end, a plurality of suction ports in the vicinity of the table top plate, and a plurality of discharge ports in the vicinity of the bottom plate, And a cylindrical column having a plurality of holes between the suction port and the discharge port,
An inner top plate having a plurality of first openings, facing the table top plate at a predetermined interval and provided to form a first space with the table top plate;
A plurality of second openings provided in the internal space of the support so as to face the inner top plate with a predetermined interval and to form a second space between the inner top plate and the inner top plate. Having a couch top,
In order to prevent overheating of the bottom plate, a predetermined space is formed in the bottom plate so that a third space is formed between the bottom plate and a first internal space is formed between the bottom plate and the central plate. An inner bottom plate facing away from each other ;
The column is disposed substantially vertically between the middle top plate and the inner bottom plate so as to form a second inner space at the center of the first inner space of the support column, and is close to the inner bottom plate. A first reflector having a third opening;
A rod-shaped heating element provided substantially vertically in the first internal space along the first reflector so that the longitudinal direction is substantially vertical;
A second reflector provided between the heating element and the inner wall surface of the support column at a predetermined interval with respect to the heating element, and provided in the second space to generate a downward air flow. Equipped with an electric fan,
The first opening, the second opening, and the first internal space that connect the air sucked into the first space from the suction port by the rotation of the electric fan to the second space. By sequentially passing, the heating element heats and discharges from the discharge port and the hole, and air from the second space is lowered in the second internal space while being warmed by the first reflector. And radiating the radiation reflected from the third opening and the ejection port and reflected by the first and second reflectors out of the cylindrical support column. And
[0007]
According to the present invention, the holes through which hot air and radiant heat are emitted are formed in a range of almost the same height as the heating element on the side surface of the support column 4. Moreover, the 1st and 2nd reflecting plate is arrange | positioned, and the radiant heat from a heat generating body tends to come out in a horizontal direction. Thereby, the radiant heat is uniformly radiated at the vertical position on the side surface of the support column. Since the radiant heat to the lower part of the column is less than the upper part, non-uniform temperature in the lower part of the heating space is improved by discharging the air flow passing through the second internal space from the lower outlet, and the entire heating space The temperature distribution can be made uniform.
A plurality of fourth openings are formed in the first reflector that forms the second internal space.
[0008]
An air guide plate that protrudes obliquely upward in the second internal space is provided in the vicinity of the fourth opening.
The heating element and at least one first and second reflecting plates provided on the heating element at a predetermined interval are provided to be inclined at a predetermined angle from a vertical direction.
The predetermined angle is an angle selected from a range of 1 to 5 degrees.
The support column is a hollow cylinder having a polygonal cross-sectional shape, and a plurality of discharge ports are formed on at least two arbitrary side surfaces, and the radiant heat of one heating element is transmitted to the first reflector and the second plate. The reflector is configured to reflect toward the holes formed in the at least two side wall surfaces.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS.
[0010]
Embodiment 1
A heater according to Embodiment 1 of the present invention will be described with reference to FIGS.
FIG. 1 is a side sectional view of a heater according to Embodiment 1 of the present invention. FIG. 2 is a side cross-sectional view showing the direction in which the radiant heat is emitted by the heat radiation d indicated by an arrow and the direction in which the hot air is emitted by an air flow a indicated by the arrow. An arrow written together with “d, a” indicates that both radiant heat and hot air are emitted. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2, and the distribution of radiant heat around the support column 4 is indicated by arrows of thermal radiation d. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2, and the blowing direction of the warm air around the support column 4 is indicated by an arrow of the air flow a.
[0011]
1 to 4, a plate-like table top 1 is supported on a plate-like bottom plate 2 by an octagonal cylindrical column 4 in which a bottom surface is alternately arranged with long sides and short sides. Yes. The inside of the column 4 is partitioned by an inner top plate 5, a middle top plate 8, and an inner bottom plate 11, which are three partition plates substantially parallel to the table top plate 1. A space between the table top plate 1 and the inner top plate 5 is referred to as a first space 6, and a space between the inner top plate 5 and the middle top plate 8 is referred to as a second space 9. A fan 20 is provided in the second space 9. The shaft of the fan 20 passes through the inner top plate 5 and is connected to a motor 21 provided in the first space 6. By arranging the motor 21 in the first space 6, the influence of heat can be avoided as will be described in detail later. A space between the middle top plate 8 and the inner bottom plate 11 is referred to as a first internal space 3, and a space between the inner bottom plate 11 and the bottom plate 2 is referred to as a third space 12. The first internal space 3 is the widest and the third space is the narrowest.
[0012]
A plurality of suction ports 22 are formed on the wall surface of the support column 4 surrounding the first space 6. A plurality of first openings 7 are formed in the inner top plate 5. A plurality of second openings 10 are formed in the middle top plate 8. No opening is formed in the inner bottom plate 11. In the first inner space 3 between the middle top plate 8 and the inner bottom plate 11, a pair of inner support plates 13 that are opposed to each other while maintaining a narrow gap on the inner wall surface of the support column 4 are provided. Each inner support plate 13 is a narrow plate-like member, and a pair of holders 15 for holding a rod-like heating element 14 are provided on the inner side surface thereof. The heater 15 holds the heating element 14 so that the longitudinal direction is substantially vertical. A pair of first reflecting plates 17 is provided substantially vertically at a position near the central axis of the support column 4 spaced from each heating element 14 by a predetermined distance. The first internal space 3 is divided into three spaces by the pair of first reflecting plates 17, and a second internal space 16 that is a space including the central axis C of the support column 4 is formed. A plurality of third openings 18 are formed in a portion near the inner bottom plate 11 below the first reflecting plate 17. Between each heat generating body 14 and the inner support plate 13, a mountain-shaped second reflecting plate 19 is provided with a predetermined space between the heat generating bodies 14. A plurality of radiant heat outlets 27 and hot air outlets 23 are formed on the other side surfaces of the support column 4 except for the side surfaces facing the inner support plate 13. About the heater comprised as mentioned above, the operation | movement is demonstrated below with reference to FIGS. 2-4.
[0013]
When the heating element 14 and the motor 21 of the fan 20 are energized, the heating element 14 generates heat and the fan 20 rotates. An air flow a is generated by the fan 20. The air flow a is introduced from the outside into the first space 6 above the fan 20 through the suction port 22. The introduced air flow a enters the second space 9 through the opening 7. The air flow a is a flow of air above the outside of the column 4. The air introduced into the second space 9 is sent downward through the second opening 10 by the fan 20 and introduced into the first internal space 3 and the second internal space 16. The air introduced into the second space 16 flows downward along the first reflector 17. This air is heated by touching the first reflecting plate 17 heated by the heating element 14, and becomes warm air. The warm air passes through the third opening 18 and the discharge port 23 formed in the lower portion of the support column 4 and is discharged along the bottom plate 2 as shown in FIG. The warm air raises the air temperature in the lower part of the heating space 24, which is the space to be warmed. The air introduced into the first internal space 3 is directly heated by the heating element 14 to become warm air and is discharged from the outlet 27 to the heating space 24.
[0014]
As shown in FIG. 3, radiant heat including infrared rays from each heating element 14 is reflected by the first reflecting plate 17 and the second reflecting plate 19 and becomes heat radiation d, and passes through the plurality of outlets 27 to the left and right respectively. The radiation is radiated into the heating space 24 in one direction to warm the heating space 24. In FIG. 4, the hot air discharge direction is indicated by an arrow a.
According to this embodiment, as shown in FIG. 2, the radiant heat d and the warm air flow a exit the heating space 24 from the outlet 27 provided in a wide range below the support column 4, so that the temperature distribution in the heating space 24 is It becomes uniform. Since the warm air flow a rises after exiting from the outlet 27, it is difficult to reach the vicinity of the bottom plate 2 at the bottom of the heating space 24. However, since the warm air flow a is discharged from the discharge port 23 in the vicinity of the bottom plate 2 as shown in FIG. 4, the heating space 24 has a substantially uniform temperature.
[0015]
The heater shown in FIG. 1 has a configuration in which the column 4 supports the table top 1, but may be configured to support the table top by a leg that is not shown. Further, although the column 4 has an octagonal bottom surface as an example, other polygonal bottom surfaces or circular bottom surfaces can be similarly implemented. The number of the rod-shaped heating elements 14 is not limited to two, and the same can be implemented by arranging three or more heating elements 14. Furthermore, although the heating element 14 has been described as an example in which it is held by the holding tool 15 fixed to the inner support plate 13, it is similarly implemented even if the holding tool is fixed to other positions such as the inner bottom plate and the middle top plate. Is possible.
[0016]
<< Embodiment 2 >>
FIG. 5 is a side sectional view of the heater according to Embodiment 2 of the present invention. In FIG. 5, the same components as those in FIG.
In the heater according to the present embodiment, a plurality of fourth openings 31 are formed near the center in the longitudinal direction of the first reflecting plate 17. A fin 32 protruding obliquely upward at an angle of about 45 ° toward the second internal space 16 is provided at the lower end of each opening 31. Other configurations are the same as those of the first embodiment shown in FIG.
In the heater of the present embodiment, a part of the air flow guided into the second internal space 16 hits the fin 32 and is guided to the fourth opening 31 to flow into the first internal space 3. The air flowing into the first internal space 3 is directly heated by the heating element 14 and discharged through the outlet 27 to the heating space 24.
In the heater of the present embodiment, air heated to some extent when passing through the second internal space 16 flows into the first internal space 3 and is further heated, so that the temperature of the air becomes high. Since this high-temperature air is discharged from the outlet 27 to the heating space 24, the air temperature in the heating space 24 becomes high, and a heater with a high heating effect can be realized.
[0017]
<< Embodiment 3 >>
FIG. 6 is a side sectional view of the heater according to Embodiment 3 of the present invention. In FIG. 6, the same components as those in FIG.
In the heater of the present embodiment, the inner support plate 13a is provided with an inclination of a predetermined angle in the range of 1 to 5 degrees from the vertical direction. Therefore, the second reflector 19 provided on the inner support plate 13a, the heating element 14 held by the holder 15 and the first reflector 17a are also inclined at the predetermined angle. As shown in FIG. 6, the upper end portion of the inner support plate 13 a is in the same position as in FIG. 1, but the lower end portion is in a direction close to the center line C of the column 4. By providing this inclination, the oblique downward angle with respect to the horizontal direction of the radiation heat emission direction is increased. As a result, the radiant heat reaching the vicinity of the upper surface of the bottom plate 2 is increased, and the air temperature is also increased.
According to the heater of the present embodiment, since the radiant heat in the vicinity of the upper surface of the bottom plate 2 is strong, there is an effect that the feet of the person sitting around the heater are particularly warm.
[0018]
<< Embodiment 4 >>
FIG. 7: is sectional drawing which cut the heater in Embodiment 4 of this invention by the surface parallel to a table top plate. A side sectional view of the heater of the present embodiment is almost the same as FIG. 1 and will be described with reference to FIG.
In the present embodiment, as shown in FIG. 7, the reflecting surface of the first reflecting plate 17 b has a shape that combines two paraboloids or surfaces that approximate a paraboloid. By placing the heating element 14 at a predetermined position in the vicinity of the focal point of the paraboloid, the radiant heat of the heating element 14 indicated by the arrow d is concentrated in a range where the central angle is about 90 °. By placing the two left and right heating elements 14 at predetermined positions in the vicinity of the focal points of the respective reflectors 17b, the radiant heat of the two heating elements 14 can be concentrated in the range of 90 ° central angles on the left and right.
According to the present embodiment, since the radiant heat is concentrated in the range of the central angle of 90 °, the heating space in this range can be particularly effectively heated.
[0019]
【The invention's effect】
As described in detail in each of the above embodiments, according to the present invention, the inner top plate and the middle of the upper part of the inner space of the cylindrical column with the table top attached to the upper end and the bottom plate attached to the lower end are provided. A fan is provided between the top plates, and a heating element and first and second reflecting plates for directing the radiant heat of the heating elements in the horizontal direction are provided in a first internal space below the middle ceiling plate. With this configuration, the air passing through the second internal space between the inner wall of the support column and the first reflector is warmed and discharged to the entire heating space and downward. Further, the radiant heat of the heating element can be reflected by the first and second reflecting plates and radiated to at least two fan-shaped regions around the support column. Thereby, heat radiation and warm air can heat a heating space efficiently, and the temperature distribution of heating space becomes uniform. Further, since the first space is provided on the upper side of the inner top plate and the third space is provided on the lower side of the inner bottom plate, the temperature rise of the table top plate and the bottom plate can be prevented.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a heater according to Embodiment 1 of the present invention. FIG. 2 is a side sectional view showing a state of heat radiation and air flow of the heater according to Embodiment 1 of the present invention. Fig. 4 is a sectional view taken along line III-III in Fig. 4. Fig. 5 is a sectional view taken along line IV-IV in Fig. 2. Fig. 5 is a side sectional view of the heater in embodiment 2 of the present invention. FIG. 7 is a cross-sectional view showing the state of heat radiation of the heater according to Embodiment 4 of the present invention. FIG. 8 is a side cross-sectional view of a conventional heater.
DESCRIPTION OF SYMBOLS 1 Table top plate 2 Bottom plate 3 1st internal space 4 Support | pillar 5 Inner top plate 6 1st space 7 1st opening part 8 Middle top plate 9 2nd space 10 2nd opening part 11 Inner bottom plate 12 3rd Space 13 inner support plate 14 heating element 15 holder 16 second internal space 17 first reflector 18 third opening 19 second reflector 20 fan 21 motor 22 suction port 23 discharge port 24 heating space 27 Outlet 31 4th opening

Claims

A table top plate is attached to the upper end, a bottom plate is attached to the lower end, a plurality of suction ports are provided near the table top plate, a plurality of discharge ports are provided near the bottom plate, and the suction ports and the discharge ports are provided. A cylindrical column having a plurality of holes between the outlets,
An inner top plate having a plurality of first openings, facing the table top plate at a predetermined interval and provided to form a first space with the table top plate;
A plurality of second openings provided in the internal space of the support so as to face the inner top plate with a predetermined interval and to form a second space between the inner top plate and the inner top plate. Having a couch top,
In order to prevent overheating of the bottom plate, a predetermined space is formed in the bottom plate so that a third space is formed between the bottom plate and a first internal space is formed between the bottom plate and the central plate. An inner bottom plate facing away from each other ;
The column is disposed substantially vertically between the middle top plate and the inner bottom plate so as to form a second inner space at the center of the first inner space of the support column, and is close to the inner bottom plate. A first reflector having a third opening;
A rod-shaped heating element provided substantially vertically in the first internal space along the first reflector so that the longitudinal direction is substantially vertical;
A second reflector provided between the heating element and the inner wall surface of the support column at a predetermined interval with respect to the heating element, and provided in the second space to generate a downward air flow. Equipped with an electric fan,
The first opening, the second opening, and the first internal space that connect the air sucked into the first space from the suction port by the rotation of the electric fan to the second space. By sequentially passing, the heating element heats and discharges from the discharge port and the hole, and air from the second space is lowered in the second internal space while being warmed by the first reflector. The radiation that is discharged from the third opening and the discharge port and reflected by the first and second reflectors is emitted from the hole to the outside of the cylindrical column. A heater characterized by that.

The heater according to claim 1, wherein a plurality of fourth openings are formed in the first reflector that forms the second internal space.

The heater according to claim 2, wherein an air guide plate that protrudes obliquely upward in the second internal space is provided in the vicinity of the fourth opening.

The at least one 1st and 2nd reflecting plate provided in the said heat generating body and the said heat generating body at predetermined intervals incline by a predetermined angle from the perpendicular direction, It provided, characterized by the above-mentioned. The heating machine described in.

The heater according to claim 4, wherein the predetermined angle is an angle selected from a range of 1 to 5 degrees.

The support column is a hollow cylinder having a polygonal cross-sectional shape, and a plurality of discharge ports are formed on each of at least two arbitrary side surfaces. The heater according to any one of claims 1 to 4, wherein the heater is configured to reflect toward a hole formed in the at least two side wall surfaces by a reflecting plate.