JP3818134B2

JP3818134B2 - Snow melting equipment

Info

Publication number: JP3818134B2
Application number: JP2001352736A
Authority: JP
Inventors: 政樹由良; 智彰梶浦; 克徳財前; 洋次上谷; 信二近藤
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 2001-11-19
Filing date: 2001-11-19
Publication date: 2006-09-06
Anticipated expiration: 2021-11-19
Also published as: JP2003147744A

Description

【０００１】
【発明の属する技術分野】
本発明は、一般家庭や店舗の敷地内の雪を効率的に融雪するための融雪装置にに関するものである。
【０００２】
【従来の技術】
積雪の多い寒冷地においては、公共の道路はもとより、一般家庭や店舗の敷地の、特に歩道から一般家庭の玄関、車庫あるいは駐車スペースまでのアプローチの除雪作業が、積雪期の日常生活での大きな問題とされてきている。
【０００３】
これを解決するためのものとしては、発熱体として電熱線や温水パイプ等を敷地内の地面に埋設して、路面の加熱を行うことで融雪を行う融雪装置がある。電熱線は通電することでジュール熱によって発熱するものであり、温水パイプは灯油ボイラーの燃焼で加熱した温水（実際は不凍液）を熱媒として循環することで発熱するものである。これらの加熱によって路面温度を上昇させて、路面上の雪を融雪することが一般的である。このような融雪装置は、ロードヒーティング装置、あるいはロードヒーティングとも呼ばれる。
【０００４】
その一例を図１８〜図２１に基づいて説明する。図１８は一般的な住宅３０が歩道３１に面して、玄関３２および駐車スペース３３を有している事例を示している。図において駐車スペース３３および玄関３２に至るアプローチには融雪装置３５が埋設されていて、その範囲を融雪領域４０として示している。
【０００５】
この融雪装置３５は、図１９に示すように、地盤に砕石を敷き詰めた路床部４１、コンクリート路盤部４２、アスファルト舗装部４３からなる地面に埋設されている。路床部４１、コンクリート路盤部４２、アスファルト舗装部４３は、それぞれ土木工事にて、深さＤ１（一例として約３００ｍｍ）、Ｄ２（約７０ｍｍ）、Ｄ３（約３０ｍｍ）にて形成される。加熱手段としてのヒータ４４は、路床部４１の上面に金属メッシュ（図示省略）とともに敷設されて、コンクリート路盤部４２、アスファルト舗装部４３にて埋設されている。なお、ヒータ４４の位置に温水パイプを埋設したものもあるが、その埋設部の基本的な構成は同様である。
【０００６】
このような融雪装置５５は降雪を検知するために、降雪センサ、外気温センサ、地温センサ（センサ類の図示は省略）を備えて、各センサからの信号に応じて自動運転したり、あるいは使用者の判断で手動運転するための制御装置を備えている。
【０００７】
【発明が解決しようとする課題】
上述の従来構成の融雪装置３５では、加熱手段であるヒータ４４や温水パイプを地表から深さＤ２＋Ｄ３である、約１００ｍｍの地中に埋設している。このため、降雪センサの検知信号に基づいて、ただちに自動運転を開始したり、または手動による運転を開始しても、しばらくの間は、加熱手段であるヒータ４４はその上部の地面を加熱することに終始する。融雪装置３５全体の温度を上昇させて、実際に融雪を開始するまでに、長時間の運転時間と多量の電気エネルギーを必要として、地表に堆積し続ける降雪をただちに融雪するには至らない。温水パイプでも、この点では同様である。
【０００８】
また、降雪は２４時間連続的に発生することは少なくて、間欠的に降雪することが多い。したがって、融雪装置３５の運転も、間欠的であることが多くて、その都度、融雪装置３５すなわち融雪領域４０の地温は低下する。そこで次の降雪時には、冷却した路面全体を再度加温するために時間が必要である。このような原因によっても、電気あるいは灯油の消費量が多くなるので、融雪装置３５は運転経費が高い。
【０００９】
また、図２９、図２１に示すように、自動運転では地温が所定温度Ｔ２０となると、予備運転ｔ５１を行い所定温度Ｔ１０まで温度を上げ、降雪検知後は本運転ｔ５２を行なう。また、降雪終了後も追加運転ｔ５３を行なうことで、融雪残りを防止して、融雪水の再凍結も防止するものである。ここで、予熱運転ｔ５１は実施したものの、降雪がない場合は消費したエネルギーが無駄となることも多いものである。
【００１０】
上記問題点を解決するものとして、いくつかの方式が提案されている。その一つの方法は、直列または並列に切換可能に接続された発熱体と地温センサおよび降雪センサを備えたロードヒーティングがある。地温センサの検知温度が設定温度より低くなると、発熱体を直列にして小電力で予備運転（予熱運転とも呼ぶ）を開始して、降雪センサが降雪を検知後には、発熱体を並列にして大電力で融雪する本運転を行う。その後は、一定の時間間隔で直列と並列を切換えて本運転を継続して、降雪センサが降雪の停止を検知した後は、小電力で予備運転を行なって、地温センサが設定温度より高くなると、予備運転を停止する。これにより、融雪運転の高効率化、省エネルギー化が可能となるものとされている。
【００１１】
また、他の方式としては、屋外の明るさも加熱温度設定データとして採用することで、路面加熱装置の余熱時間を短くして、効率よく路面を予熱、融雪あるいは凍結防止するものである。特に、外気温が低くとも良く晴れて明るい時は短時間のうちに降雪が開始することは少なく殆どない点に着目して、予熱運転温度を低くするものであって、予熱電力の省エネルギーが可能とされているものである。
【００１２】
しかしながら、上記二つの方式はいずれも省エネルギー化を意図したものであるが、実際の使用履歴に基づき運転制御するものではなく、その融雪性能、実使用時のエネルギーに関してそれぞれに課題を有する。
【００１３】
本発明は、以上のような従来の融雪装置が有している課題を解決するために、寒冷地の降雪特性および使用実態に最適な融雪性能を発揮する融雪装置を提供することを目的としているものである。
【００１４】
【課題を解決するための手段】
前記目的を達成するために、本発明の融雪装置は、各検知手段からの検知信号に基づいて加熱手段の運転を制御する制御手段は、融雪パネルの使用履歴を記憶する使用履歴記録手段を有して、使用履歴に応じて加熱手段の運転方法を設定し、前記融雪パネル上を移動する移動体を検出する移動体検知手段を有するものである。
【００１５】
これにより、特に、使用履歴記録手段よる使用履歴を参照して、本運転や予備運転での加熱手段の能力を調整した運転方法が設定でき、使用実績の多い時間帯では高速に融雪したり、他の時間帯では省エネルギーな融雪を行うことができ、降雪特性および使用実態に最適な融雪性能を発揮する。さらに、車両、人等の状況を検知してその実態に応じた融雪性能を発揮する。
【００１６】
【発明の実施の形態】
請求項１に記載の発明は、加熱手段によって加熱される融雪パネルと、前記融雪パネルの温度を検出する温度検知手段と、外気の温度を検出する外気温検知手段と、降雪の有無を検出する降雪検知手段と、前記各検知手段からの検知信号に基づいて加熱手段の運転を制御する制御手段とを備え、前記制御手段は融雪パネルの使用履歴を記憶する使用履歴記録手段を有して、使用履歴に応じて加熱手段の運転方法を設定し、前記融雪パネル上を移動する移動体を検出する移動体検知手段を有する融雪装置とすることにより、制御手段は降雪検知信号に基づいて、加熱手段によって融雪パネルを加熱して、融雪作用を発揮する本運転を行なう。また、降雪検知信号がなくとも、融雪パネル温度検知信号や外気温検知信号に基づいて、加熱手段によって融雪パネルを加熱する予備運転を行なって、その後の降雪検知信号に基づく本運転を短時間で行なう。特に、使用履歴記録手段よる使用履歴を参照して、本運転や予備運転での加熱手段の能力を調整した運転方法が設定でき、使用実績の多い時間帯では高速に融雪したり、他の時間帯では省エネルギーな融雪を行うことができ、降雪特性および使用実態に最適な融雪性能を発揮する。
【００１７】
さらに、車両、人等の状況を検知してその実態に応じた融雪性能を発揮する。
【００１８】
請求項２に記載の発明は、加熱手段によって加熱される融雪パネルと、前記融雪パネルの温度を検出する温度検知手段と、外気の温度を検出する外気温検知手段と、降雪の有無を検出する降雪検知手段と、前記各検知手段からの検知信号に基づいて加熱手段の運転を制御する制御手段とを備え、前記制御手段は融雪パネルの使用履歴を記憶する使用履歴記録手段を有して、使用履歴に応じて加熱手段の運転方法を設定するとともに降雪検知信号がない状態で、他の検知信号に基づいて加熱手段を予め運転する予備運転において、加熱手段の出力を使用履歴に応じて調整する融雪装置とすることにより、降雪検知信号がない状態において予備運転を行う場合に、使用履歴に基づいて使用頻度が多くて、短時間での融雪が必要と判断される時間帯では、加熱手段の出力を増大して、短時間で融雪パネル温度を高めて、降雪検知後は短時間で融雪するための予備運転を行うことができる。
【００１９】
請求項３に記載の発明は、加熱手段によって加熱される融雪パネルと、前記融雪パネルの温度を検出する温度検知手段と、外気の温度を検出する外気温検知手段と、降雪の有無を検出する降雪検知手段と、前記各検知手段からの検知信号に基づいて加熱手段の運転を制御する制御手段とを備え、前記制御手段は融雪パネルの使用履歴を記憶する使用履歴記録手段を有して、使用履歴に応じて加熱手段の運転方法を設定するとともに使用履歴記録手段により使用実績の少ない時間帯では、予備運転による温度上昇値を他の時間帯よりも小さくした融雪装置とすることにより、使用履歴に基づいて使用頻度が少なくて、ほとんど使わない時間帯では、予備運転による融雪パネルの温度上昇値を小さくして、低温度で維持することにより、実際に降雪を検知するまでの予備運転で省エネルギーな運転を行うことができる。
【００２０】
請求項４に記載の発明は、加熱手段によって加熱される融雪パネルと、前記融雪パネルの温度を検出する温度検知手段と、外気の温度を検出する外気温検知手段と、降雪の有無を検出する降雪検知手段と、前記各検知手段からの検知信号に基づいて加熱手段の運転を制御する制御手段とを備え、前記制御手段は融雪パネルの使用履歴を記憶する使用履歴記録手段を有して、使用履歴に応じて加熱手段の運転方法を設定するとともに計時手段を有しその出力信号に基づいて、昼間は予備運転による温度上昇値を夜間よりも少なく予め設定された融雪装置とすることにより、昼間では太陽光による融雪効果を想定して、予備運転の融雪パネルの温度上昇値を小さくすることでより省エネルギーな運転を行うことができる。
【００２１】
請求項５に記載の発明は、加熱手段によって加熱される融雪パネルと、前記融雪パネルの温度を検出する温度検知手段と、外気の温度を検出する外気温検知手段と、降雪の有無を検出する降雪検知手段と、前記各検知手段からの検知信号に基づいて加熱手段の運転を制御する制御手段とを備え、前記制御手段は融雪パネルの使用履歴を記憶する使用履歴記録手段を有して、使用履歴に応じて加熱手段の運転方法を設定するとともに融雪装置に電力が供給されない電源停止時間帯を認知して、前記電源停止時間帯まで予備運転が必要と判断された時に、使用履歴に応じて直前の予備運転による温度上昇値を高めた融雪装置とすることにより、電源停止時間帯を認知して、前記電源停止時間帯まで予備運転が必要と判断された時には、使用履歴に応じて直前の予備運転による融雪パネルの温度上昇値を高めた予備運転を行う。このことで使用履歴に基づいて使用実績がある電源停止時間帯での降雪時に対して、少量の降雪は融雪できるうえに、電源停止時間帯直後に速やかに融雪できる。また、この予備運転によって、電源停止時間帯および直後の降雪検知時にあたり、融雪を速やかに行うことができて適切な運転ができる。
【００２２】
請求項６に記載の発明は、加熱手段によって加熱される融雪パネルと、前記融雪パネルの温度を検出する温度検知手段と、外気の温度を検出する外気温検知手段と、降雪の有無を検出する降雪検知手段と、前記各検知手段からの検知信号に基づいて加熱手段の運転を制御する制御手段とを備え、前記制御手段は融雪パネルの使用履歴を記憶する使用履歴記録手段を有して、使用履歴に応じて加熱手段の運転方法を設定するとともに降雪検知信号を検出時に、融雪パネルの温度検知信号が外気温検知信号より高いときには、加熱手段の運転を開始するまでの間に遅延時間を設けた融雪装置とすることにより、融雪パネルの温度検知信号が外気温検知信号より高いときには、融雪パネルが有する温度エネルギーで融雪効果を発揮させて、融雪パネルの温度が所定温度以下となった後に加熱手段の運転を開始するので、より省エネルギーな運転を行うことができる。なお、制御手段は、予備運転において、融雪パネルの温度が外気温より低く且つ所定温度以下であるときには、降雪の有無に関わらず加熱手段の運転を開始して、融雪パネルの温度を外気温より高くさせることもできる。
【００２３】
請求項７に記載の発明は、加熱手段によって加熱される融雪パネルと、前記融雪パネルの温度を検出する温度検知手段と、外気の温度を検出する外気温検知手段と、降雪の有無を検出する降雪検知手段と、前記各検知手段からの検知信号に基づいて加熱手段の運転を制御する制御手段とを備え、前記制御手段は融雪パネルの使用履歴を記憶する使用履歴記録手段を有して、使用履歴に応じて加熱手段の運転方法を設定するとともに使用頻度予測に対応した複数個の運転モードを有して、加熱手段の運転を行う融雪装置とすることにより、設定された複数個の運転モードの内から設置場所および使用方法に応じた適切な運転方法を予め選択できる。すなわち、制御手段に、昼間に多く使用する運転モード、夜間に多く使用する運転モード、特定時間に集中して使用する運転モード等の運転モードがあって、一般家庭、店舗等設置場所での使用実態に合わせて予め設定できる。したがって、設置場所に応じた適切な加熱手段の運転を行うので、降雪時にも速やかに融雪できて、快適であるし省エネルギーである。
【００２４】
請求項８に記載の発明は、加熱手段によって加熱される融雪パネルと、前記融雪パネルの温度を検出する温度検知手段と、外気の温度を検出する外気温検知手段と、降雪の有無を検出する降雪検知手段と、前記各検知手段からの検知信号に基づいて加熱手段の運転を制御する制御手段とを備え、前記制御手段は融雪パネルの使用履歴を記憶する使用履歴記録手段を有して、使用履歴に応じて加熱手段の運転方法を設定するとともに予め設定された運転モードによる加熱手段の運転方法を、使用履歴に基づいて修正する融雪装置とすることにより、装置の設置場所に応じた適切な運転に変更を繰り返して、より省エネルギーな運転方法を実現する。
【００２５】
請求項９に記載の発明は、加熱手段によって加熱される融雪パネルと、前記融雪パネルの温度を検出する温度検知手段と、外気の温度を検出する外気温検知手段と、降雪の有無を検出する降雪検知手段と、前記各検知手段からの検知信号に基づいて加熱手段の運転を制御する制御手段とを備え、前記制御手段は融雪パネルの使用履歴を記憶する使用履歴記録手段を有して、使用履歴に応じて加熱手段の運転方法を設定するとともに運転モードの初期状態への再設定方法を有する融雪装置とすることにより、制御手段が行った運転モードの設定変更および使用履歴に基づいた運転モードの修正内容を破棄して初期状態に再設定でき、使用者の生活パターン、主たる利用目的の変更、さらには設置場所の変更等に対応できるものである。
【００２６】
請求項１０に記載の発明は、加熱手段によって加熱される融雪パネルと、前記融雪パネルの温度を検出する温度検知手段と、外気の温度を検出する外気温検知手段と、降雪の有無を検出する降雪検知手段と、前記各検知手段からの検知信号に基づいて加熱手段の運転を制御する制御手段とを備え、前記制御手段は融雪パネルの使用履歴を記憶する使用履歴記録手段を有して、使用履歴に応じて加熱手段の運転方法を設定し、前記加熱手段は、金属材料で形成した融雪プレートを加熱コイルで誘導加熱する融雪装置とすることにより、加熱手段が積雪する融雪プレートを直接加熱するので、より高速な融雪が可能である。しかも、制御手段は、時刻や使用履歴に対して適切に対応できて、使い勝手と維持費の両面で優れたものである。
【００２７】
【実施例】
以下、この発明の実施例について、図面を参照しつつ説明する。
【００２８】
（実施例１）
本発明の実施例１における融雪装置を図１〜図５に示している。図１〜図３において、融雪パネル１は、融雪用熱量を供給する加熱手段として電熱線による線状の加熱手段（ヒータ）２と、融雪パネル１の温度を検出する温度検知手段３とを有している。また加熱手段２を下方より覆う保護カバー７を備えて、加熱手段２は融雪パネル１上面の発熱部に対して押し付けられた構成となっている。また、保護カバー７は渦巻き形状に配置された複数個の加熱手段２を保護するとともに、設置面とは空隙（本実施例では約５ｍｍ）を有している。なお、この融雪パネル１は全体で所定の厚さ（本実施例では約２０ｍｍ）を有するものである。
【００２９】
また、外気の温度を検出する外気温検知手段４と、降雪の有無を検出する降雪検知手段５と、融雪パネル１上を移動する自動車、人等を検出する移動体検知手段６と、各検知手段からの検知信号に基づいて加熱手段２の運転を制御する制御手段８を有している。降雪検知手段５や移動体検知手段６には、赤外線センサを応用した検知手段を設けているが、圧力や画像等、いかなる検知方法であっても良いものである。
【００３０】
制御手段８は運転時刻を検出する計時手段８ａ、使用履歴記録手段８ｂを有しており、図４のように、運転時刻および使用履歴を参照して、加熱手段２の予備運転や本運転の運転方法を設定するものである。図５に示すように、運転時刻と使用頻度の実績が、使用履歴記録手段８ｂに使用履歴として蓄積されているものである。ここでは、１日を使用頻度によって、高使用頻度時間帯Ｂ１と低使用頻度時間帯Ｂ２に分割できる状況を示している（時刻Ａ、Ｂと使用頻度Ｎによる）。
【００３１】
制御装置８は、融雪電力９から加熱手段２に電力を供給して、融雪パネル１を加熱する。また、制御装置８には、通常の電源から電力を供給して運転するのが通常である。１０は融雪パネル１の設置場所、１１は積雪の様子を示す。
【００３２】
次に、本実施例における融雪装置の運転方法について説明する。ここでは、各検知手段の検知信号に基づいた自動運転を開始した場合において、降雪検知信号を得て本運転を行うが、低使用頻度時間帯Ｂ２から高使用頻度時間帯Ｂ１に渡って運転を行った場合を想定する。
【００３３】
図６に示すように、制御装置８は、降雪検知手段５の降雪検知信号に基づいて本運転ｔ２を開始する。これに先行して、融雪パネル１の温度検知手段３が、温度Ｔ２以下であれば、予備運転を行うものではあるが、ここではＴ２以上であって、直ちに本運転ｔ２を行う。
【００３４】
制御装置８は、低使用頻度時間帯Ｂ２では、加熱手段２の出力を少なくして、比較的低速に融雪パネル１の温度が上昇する。温度Ｔ１にて融雪が行われ、降雪終了後の追加運転ｔ３を行う。これにより、確実に融雪して融雪水の再凍結を防止するものである。その後、高使用頻度時間帯Ｂ１（図６のＡ以降）において、降雪検知手段５の降雪検知信号に基づいて本運転ｔ２を開始するにあたり、加熱手段２の出力を増大して、短時間で融雪パネル１の温度を上昇させる。温度Ｔ１にて融雪が行われ、降雪終了後の追加運転ｔ３を行う。同様に、確実に融雪して融雪水の再凍結を防止するものである。
【００３５】
また、制御手段８は、図７に示すように、低使用頻度時間帯Ｂ２での予備運転ｔ１では、加熱手段２の出力を少なくして、比較的低速に融雪パネル１の温度を上昇させる。すなわち、予備運転ｔ１では、本運転ｔ２よりも低出力で加熱するものであって、降雪検知後に高出力で加熱して、本運転ｔ２、追加運転ｔ３をして融雪するものである。融雪パネル１は短時間で温度上昇するので、適切に短時間で融雪が行えるし、予備運転ｔ１での無駄な消費エネルギーを抑制できるものである。
【００３６】
また、制御手段８は、図８に示すように、予備運転ｔ１１において、低使用頻度時間帯Ｂ２では融雪パネル１の温度をＴ４、高使用頻度時間帯Ｂ１では融雪パネル１の温度をＴ３として、Ｔ４をＴ３より低くする。このことで、高使用頻度時間帯Ｂ１での降雪時は速やかに融雪を開始して、快適に使用できるものである。一方、低使用頻度時間帯Ｂ２では、融雪パネル１を低温度に保持するので、予備運転ｔ１１での無駄な消費エネルギーを抑制できるものである。もちろん、降雪時は融雪パネル１であるから、適切な時刻で融雪を開始できるものである。
【００３７】
（実施例２）
図９は本発明の実施例２における融雪装置を示している。基本構成は実施例１と同様であるのでその説明は省略する。
【００３８】
制御手段８は、計時手段８ａの検知信号に基づいて、夜間は融雪パネル１の温度が他の時間帯よりも高い予備運転温度にて予備運転ｔ２１を行なう運転方法を有する。すなわち、両時間帯の予備運転温度を比較すると、昼間の予備運転温度Ｔ６よりも、夜間の予備運転温度Ｔ５を高めているものである。なお、本実施例では一例として１６：００にて昼間と夜間を区別しているが、これに限定するものではない。
【００３９】
このような運転方法では、制御装置８は、計時手段の検知信号に基づいて、夜間では太陽光による融雪効果が殆どないもの判断して、他の時間帯よりも高い予備運転温度Ｔ５にて予備運転を行なうので、その後、降雪検知信号に基づいて本運転ｔ２２を実行したときには、融雪時間を短縮できる（なお、ｔ２３は追加運転を示す）。もちろん、昼間には低い予備運転温度Ｔ６にて予備運転を行なって、省エネルギーな融雪が行なえる。
【００４０】
（実施例３）
図１０〜図１２は本発明の実施例３における融雪装置を示している。基本構成は実施例１と同様であるのでその説明は省略する。
【００４１】
本実施例の融雪装置も、実施例１と同様に、寒冷地において一般的なことではあるが、融雪装置用に専用に接続された融雪電力９にて加熱手段２に電力を供給するものである。制御装置８は、図１０に示すように、自動運転では、運転時刻および電力停止時刻の情報に基づいて、予備運転の運転方法を調整するものである。そして、図１１に示すように、１日の内で、所定時刻に電力供給が停止する融雪電力停止時間帯Ｑを有するものである。この融雪電力停止時間帯Ｑは、通常は夕方を含んで、約２〜５時間は設定されるものである。しかも、この時間帯での降雪の可能性、自動車、人の通過は頻繁に起こりうる時間帯である。
【００４２】
実施例の運転方法について、図１２を用いて説明する。制御装置８は、融雪パネル１の温度がＴ２まで低下したという温度検知信号に基づいて、予備運転ｔ４１を開始する。これにより融雪パネル１の温度を所定温度に高めて保持し、その後に降雪検知信号に基づいて本運転ｔ４２および追加運転ｔ４３を行って、融雪を行う。
【００４３】
この予備運転ｔ４１では、計時手段８ａの出力信号を参照して、予備運転温度を設定している。この時点で、予備運転中に融雪電力停止時間帯Ｑに重複することが判断されると、比較的高い予備運転温度（温度Ｔ１以上）まで加熱手段２を運転して、予備運転ｔ４１を行なう。その後、融雪電力停止時間帯Ｑになって、融雪パネル１は放熱あるいは降雪を融雪することによって温度が低下する。
【００４４】
融雪電力停止時間帯Ｑの直後に、降雪検知信号を得ると、本運転ｔ４２を行なって、急速に融雪パネル１の温度をＴ１まで上昇させて融雪する。降雪検知信号が停止した後も、引き続いて追加運転ｔ４３を行なって、確実に融雪して融雪水の再凍結を防止するものである。
【００４５】
このように予備運転ｔ４１で融雪電力停止時間帯Ｑまでに、融雪パネル１の温度を通常の本運転ｔ４２での温度Ｔ１よりも、高い予備運転温度まで加熱して、その温度を維持するものであるから、融雪電力停止時間帯Ｑにおいて、降雪があった場合にも、部分的には融雪できるという効果が得られる。したがって、直後の本運転ｔ４２での融雪はより短時間で行なえるものである。また融雪電力停止時間帯Ｑであっても、自動車、人の通過には支障なく安全である。
【００４６】
（実施例４）
図１３は本発明の実施例４における融雪装置を示している。基本構成は実施例１と同様であるのでその説明は省略する。
【００４７】
この実施例３では、制御手段８は、図に示すような運転方法を有しており、自動運転を開始して、予備運転および本運転に先行して、融雪パネル１の温度を外気温と比較するものである。
【００４８】
まず、外気温より高い状態で降雪検知信号を検出した場合は、融雪パネル１の温度が所定温度に低下するまでの間、そのまま放置する。すなわち、加熱手段２を運転するまでの間に遅延時間ｔｄを有して、この遅延時間ｔｄで融雪パネル１の温度が所定温度以下となった後に、加熱手段２の運転を開始する運転方法を行なうものである。
【００４９】
この遅延時間ｔｄでの融雪は消費エネルギーが殆どない状態で行えるものである。なお、このような遅延時間ｔｄを設けても、融雪パネル１の予備運転および本運転での温度は速やかに上昇して、必要な融雪性能を発揮できる。
【００５０】
（実施例５）
図１４〜図１６は本発明の実施例５における融雪装置を示している。基本構成は実施例１と同様であるのでその説明は省略する。
【００５１】
この実施例５では、制御手段８は、図１４に示すような運転方法を有しており、自動運転を開始して、予備運転および本運転に先行して、設定使用モードに基づいて、加熱手段２の運転方法を制御するものである。
【００５２】
制御手段８は、予め運転時刻ごとに使用頻度を予測した使用頻度予測曲線を有しており、これを選択することで使用頻度に対応した複数個の運転モードを行う。
【００５３】
すなわち、制御装置８は、複数個の運転モードの内から設置場所および使用方法に応じた適切な運転方法を予め選択できる。例えば、制御手段８に、図１５に示すように、昼間に多く使用する運転モード１、図１６に示すように、夜間に多く使用する運転モード２、特定時間に集中して使用する運転モード３（図示せず）等の運転モードがあって、一般家庭、店舗等設置場所での使用実態に合わせて予め設定できる。制御手段８は、設置場所１０に応じた適切な加熱手段２の運転を行うので、降雪時にも速やかに融雪できて、快適であるし省エネルギーである。
【００５４】
なお、Ｂ１０は高使用頻度時間帯、Ｂ２０は低使用頻度時間帯、Ｎは使用頻度を示しており、実施例１と同様である。
【００５５】
また、制御手段８は、予め設定された運転モードによる加熱手段２の運転方法を、使用履歴に基づいて修正することができる。すなわち、制御手段８は、使用履歴に応じて運転モードの内容を変更するものである。図１７には、運転モード１が実際の使用履歴に基づいて、高使用頻度時間帯Ｂ１０の運転時刻（時刻ＡからＡ１、時刻ＢからＢ１）を修正し高使用頻度時間帯Ｂ１１とする事例を示す。このように制御手段８は、使用履歴に基づいて、加熱手段２の能力、融雪パネル１の温度等の運転方法を制御する。設置場所１０に応じた適切な運転に変更を繰り返して、より省エネルギーな運転方法を実現する。
【００５６】
また、制御手段８は、運転モードを初期状態への再設定方法を有する。すなわち、制御手段８が行った運転モードの設定変更および使用履歴に基づいた運転モードの修正内容を破棄して初期状態に再設定できる。
【００５７】
このように、制御手段８が初期状態への再設定方法を有することは、使用者の生活パターン、主たる利用目的の変更、さらには設置場所の変更等に対応できる融雪装置を提供できる。
【００５８】
なお、上記の各実施例で、加熱手段２にはヒータを使用しているが、融雪パネル１の加熱部を金属材料よりなる金属プレートで形成して、これを誘導加熱する加熱コイルを加熱手段２としても良いものである。このように構成すれば、融雪パネル１の加熱部を誘導加熱するので、計時手段８ａの検知信号に基づいて、加熱手段２の出力にて速やかな加熱作用を得るので、より短時間で、省エネルギーで予備運転および本運転で行なうことができる。もちろん、基本構成となる制御手段８についても、上記実施例とは具体的な制御回路としては異なるものであるが、誘導加熱で金属プレートを発熱させることは公知技術であり、ここでは詳細な説明は省略する。
【００５９】
また、上記の各実施例で加熱手段２がヒータや加熱コイルでなくて、熱媒体が循環する温水パイプであっても、薄型の融雪パネル１を実現できるものであれば、上記実施例と同様の効果が得られることも明白である。
【００６０】
また、上記の各実施例で融雪装置の融雪パネル１は、その外形が矩形であるものとして構成したが、円形および多角形等であってもよい。なお、実施例の融雪パネル１の外形サイズは１：２であることによって、縦横自在に組み合わせて必要な領域に隙間なく設置することができるが、これに限定するものでもなく、１：１、１：３等、様々な外形サイズであってよいものである。
【００６１】
また、上記の各実施例で融雪装置の融雪パネル１は、融雪パネル１の外形サイズが縦５０ｃｍ、横１００ｃｍの矩形のものを想定した場合であって、これらは種々に設定可能なものである。外形サイズによって、材質、設置場所等によって、適宜変更しても何ら問題ないものである。
【００６２】
また、上記の各実施例で融雪装置の融雪パネル１は、既存の舗装部の上部に設置されているが、その舗装部を融雪パネル１の厚さだけ掘削してから、周囲の舗装部と高さが同一となるか、少しだけ高くなるように設置してもよいものであることは言うまでもない。もちろん、設置場所の状態によっては、路盤部を掘削して、舗装部を融雪パネル１の設置場所として整地してから、融雪装置の融雪パネル１を設置してもよいことは言うまでもない。いずれにせよ、融雪パネル１の上面を露出させて、融雪装置として形成すれば良いものである。
【００６３】
また、上記の各実施例で、降雪は２４時間連続的に発生することは少なくて、夜間から早朝に降って、日中は降らないといったように、間欠的に降雪することが多い。したがって、融雪装置の運転も、間欠的であることが多くなる。その都度、融雪パネル１は一度冷却するものの、再度の加温には時間が短時間で行える。そのためにも、融雪パネル１の消費電力量が少なくてよいので、融雪装置のランニングコストも安価である。すなわち、従来の地中に埋設する融雪装置に比べて、短時間で、すなわち少ない消費電力量で融雪ができるものである。そこで積雪期全体を通じて考えると、融雪装置において融雪パネル１の表面温度の上昇が高速化することにより、間欠的な運転でのエネルギーの利用効率が高い。この融雪パネル１による融雪装置は、実際の降雪条件に対して適切な融雪性能を発揮して、運転効率が高いと言える。すなわち、優れた融雪性能を実現する。
【００６４】
また、上記の各実施例で、融雪水や雨水が融雪パネル１の上面に残存した状態に対しては、微細な凹凸を有する滑り止めの防滑仕上層を形成することによって、人や自動車が不用意に滑ることを防止できるので、通年でも安心して使用できる融雪装置である。防滑仕上層としては、融雪パネル１の表面に塗布されて、滑り止め効果を発揮する粒子状の混合物を含む塗料（この不純物は、骨材とも呼ばれる）で仕上げられたものでよい。また、融雪パネル１自体に、凹凸を形成したものであっても良いし、防滑仕上層自体が凹凸を有する金属板であってもよいものである。また、防滑仕上層は融雪パネル１の全面に形成されているが、全体に形成することに限定するものではなく、一部分であっても十分にその効果を発揮することもできるものである。
【００６５】
また、上記の各実施例で、融雪パネル１を１枚の金属板で形成しているが、これに限定するものではない。樹脂のプレートや、樹脂と金属の多層板、金属と金属の多層板等、種々の構成でもよくて、加熱手段の保護を果たすと共に、薄型の部材であれば、その部分の加熱容量が小さくて、短時間でその表面を加温できるものである。例えば、樹脂と金属の多層板とすれば、樹脂の表面形状で、滑り止め効果や、融雪水の流出経路を簡単に形成できると共に、下部の金属板で荷重に対する強度を確保できる。また、少なくとも一層を金属材料とすることにより、種々な負荷、特に鋭利な物体が押し付けられたとしても、強度が得られて加熱素子の損傷が防止できる。さらに金属と金属の多層板とすれば、上部には耐食性の高い金属材料、下部には高強度の金属材料を組み合わせることが可能となり、薄型でありながら、必要な加熱性能と耐久強度が得られるものである。
【００６６】
また、本発明の融雪パネルは、本来は融雪用ではあるが、全体を均一に速やかに加熱することができるものであるから、一般住宅の床はもちろん、倉庫、作業場、店舗等の床面や壁面にて加温する暖房装置としても使えるものである。なおまた、水滴が付着することの多い食品工場、調理場、食堂等の床面にも、防滑性のある暖房装置として、効果的に使用できるものであることも明白である。
【００６７】
【発明の効果】
以上のように本発明は、使用履歴に応じて加熱手段の運転方法を設定することにより、寒冷地の降雪特性および使用実態に最適な融雪性能を発揮する融雪装置を提供することことができるものである。
【図面の簡単な説明】
【図１】本発明の実施例１における融雪装置の基本構成を示す要部断面図
【図２】同実施例１の融雪パネルの要部断面図
【図３】同実施例１の融雪パネルを示す平面図
【図４】同実施例１の融雪装置の運転方法を示すフローチャート
【図５】同実施例１の融雪装置の使用頻度履歴を示すタイムチャート
【図６】同実施例１の本運転における融雪パネルの温度を示すタイムチャート
【図７】同実施例１の予備運転における融雪パネルの温度を示すタイムチャート
【図８】同実施例１の予備運転における融雪パネルの温度を示すタイムチャート
【図９】本発明の実施例２における融雪パネルの温度を示すタイムチャート
【図１０】本発明の実施例３における融雪装置の運転方法を示すフローチャート
【図１１】同実施例３における融雪電力の供給を示すタイムチャート
【図１２】同実施例３の融雪パネルの温度を示すタイムチャート
【図１３】本発明の実施例４における融雪装置の運転方法を示すフローチャート
【図１４】本発明の実施例４における融雪装置の運転方法を示すフローチャート
【図１５】同実施例４における運転モード１の使用頻度予測を示すタイムチャート
【図１６】同実施例４における運転モード２の使用頻度予測を示すタイムチャート
【図１７】同実施例４における運転モード１の使用頻度の修正を示すタイムチャート
【図１８】従来の融雪装置の設置場所を示す外観図
【図１９】従来の融雪装置の設置構造を示す要部断面図
【図２０】従来の融雪装置の温度を示すタイムチャート
【図２１】従来の融雪装置の運転方法を示すフローチャート
【符号の説明】
１融雪パネル
２加熱手段
３温度検知手段
４外気温検知手段
５降雪検知手段
６移動体検知手段
８制御手段
８ａ計時手段
８ｂ使用履歴記録手段[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a snow melting device for efficiently melting snow in a general household or store site.
[0002]
[Prior art]
  In cold regions where there is a lot of snow, snow removal work not only on public roads but also on general households and store sites, especially from the sidewalks to general household entrances, garages or parking spaces, is a major part of everyday life in the snowy season. It has been considered a problem.
[0003]
  In order to solve this problem, there is a snow melting device that melts snow by heating a road surface by burying a heating wire, a hot water pipe, or the like as a heating element on the ground in the site. The heating wire generates heat by Joule heat when energized, and the hot water pipe generates heat by circulating hot water (actually antifreeze) heated by combustion of a kerosene boiler as a heat medium. Generally, the temperature of the road surface is increased by such heating to melt the snow on the road surface. Such a snow melting device is also called a road heating device or a road heating.
[0004]
  One example will be described with reference to FIGS. FIG. 18 shows an example in which a general house 30 faces a sidewalk 31 and has an entrance 32 and a parking space 33. In the figure, a snow melting device 35 is embedded in the approach to the parking space 33 and the entrance 32, and the range is shown as a snow melting region 40.
[0005]
  As shown in FIG. 19, the snow melting device 35 is embedded in the ground made up of a road bed portion 41, a concrete roadbed portion 42, and an asphalt pavement portion 43 laid with crushed stones on the ground. The road bed portion 41, the concrete roadbed portion 42, and the asphalt pavement portion 43 are formed at a depth D1 (about 300 mm as an example), D2 (about 70 mm), and D3 (about 30 mm), respectively, by civil engineering work. The heater 44 as a heating means is laid together with a metal mesh (not shown) on the upper surface of the road bed portion 41 and is embedded in the concrete roadbed portion 42 and the asphalt pavement portion 43. Some heaters 44 have a hot water pipe embedded therein, but the basic configuration of the embedded portion is the same.
[0006]
  In order to detect snowfall, such a snow melting device 55 includes a snowfall sensor, an outside air temperature sensor, and a ground temperature sensor (sensors are not shown), and is automatically operated or used in response to signals from each sensor. A control device for manual operation at the discretion of the operator.
[0007]
[Problems to be solved by the invention]
  In the snow melting device 35 having the above-described conventional configuration, the heater 44 and the hot water pipe, which are heating means, are embedded in the ground at a depth of D2 + D3 and about 100 mm. For this reason, even if the automatic operation is started immediately or the manual operation is started based on the detection signal of the snowfall sensor, the heater 44 as the heating means heats the ground on the upper part for a while. From beginning to end. It takes a long operation time and a large amount of electric energy to raise the temperature of the entire snow melting device 35 and actually start the snow melting, and the snowfall that continues to accumulate on the ground cannot be melted immediately. The same is true for hot water pipes.
[0008]
  In addition, snowfall rarely occurs continuously for 24 hours and often snows intermittently. Therefore, the operation of the snow melting device 35 is often intermittent, and the ground temperature of the snow melting device 35, that is, the snow melting region 40 is lowered each time. Therefore, at the next snowfall, it takes time to reheat the entire cooled road surface. Because of this cause, the consumption of electricity or kerosene increases, so the snow melting device 35 has high operating costs.
[0009]
  As shown in FIGS. 29 and 21, when the ground temperature reaches a predetermined temperature T20 in the automatic operation, the preliminary operation t51 is performed to raise the temperature to the predetermined temperature T10, and after the snowfall is detected, the main operation t52 is performed. Further, the additional operation t53 is also performed after the end of snowfall, so that the remaining snow melt is prevented and refreezing of the snow melt water is also prevented. Here, although the preheating operation t51 is performed, the consumed energy is often wasted when there is no snowfall.
[0010]
  Several methods have been proposed to solve the above problems. One of the methods is road heating including a heating element, a ground temperature sensor, and a snowfall sensor that are switchably connected in series or in parallel. When the detection temperature of the ground temperature sensor becomes lower than the set temperature, a preliminary operation (also called preheating operation) is started with a small amount of power in series with the heating element. After the snowfall sensor detects snowfall, the heating element is placed in parallel. The main operation is to melt snow with electric power. After that, the series operation and the parallel operation are switched at regular time intervals and the main operation is continued.After the snowfall sensor detects the stoppage of snowfall, the preliminary operation is performed with a small amount of power, and the earth temperature sensor becomes higher than the set temperature. , Stop preliminary operation. Thereby, it is supposed that the efficiency and energy saving of snow melting operation can be achieved.
[0011]
  As another method, the outdoor brightness is also used as the heating temperature setting data, so that the remaining heat time of the road surface heating device is shortened and the road surface is efficiently preheated, melted or frozen. In particular, when the outside air temperature is low and it is clear and bright, it is rare to start snowing in a short period of time and it is rare that the preheating operation temperature is lowered, and it is possible to save energy of preheating power. It is what is said.
[0012]
  However, both of the above two methods are intended to save energy, but do not control operation based on the actual use history, and have respective problems with respect to snow melting performance and energy during actual use.
[0013]
  In order to solve the problems of the conventional snow melting apparatus as described above, an object of the present invention is to provide a snow melting apparatus that exhibits snow melting performance that is optimum for snowfall characteristics and actual usage in cold regions. Is.
[0014]
[Means for Solving the Problems]
  In order to achieve the above object, in the snow melting device of the present invention, the control means for controlling the operation of the heating means based on the detection signal from each detecting means has a use history recording means for storing a use history of the snow melting panel. And set the operation method of the heating means according to the usage historyAnd moving body detecting means for detecting a moving body moving on the snow melting panel.To do.
[0015]
  Thereby, in particular, with reference to the use history by the use history recording means, it is possible to set an operation method that adjusts the ability of the heating means in the main operation and the preliminary operation, and in a time zone with a lot of use results, Energy-saving snow melting can be performed in other time zones, and snow melting performance optimal for snowfall characteristics and usage conditions is exhibited.Furthermore, it detects the situation of vehicles, people, etc., and demonstrates snow melting performance according to the actual situation.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
  According to the first aspect of the present invention, the snow melting panel heated by the heating means, the temperature detecting means for detecting the temperature of the snow melting panel, the outside air temperature detecting means for detecting the temperature of the outside air, and the presence or absence of snowfall are detected. Snowfall detection means, and control means for controlling the operation of the heating means based on the detection signal from each detection means, the control means has a use history recording means for storing the use history of the snow melting panel, Set operation method of heating means according to usage historyAnd moving body detecting means for detecting a moving body moving on the snow melting panel.By using the snow melting device, the control means heats the snow melting panel by the heating means based on the snowfall detection signal, and performs the main operation to exert the snow melting action. Further, even if there is no snowfall detection signal, a preliminary operation for heating the snowmelt panel by the heating means is performed based on the snowmelt panel temperature detection signal or the outside air temperature detection signal, and the subsequent main operation based on the snowfall detection signal is performed in a short time. Do. In particular, it is possible to set an operation method that adjusts the capacity of the heating means in the main operation and preliminary operation with reference to the use history by the use history recording means. In the belt, energy-saving snow melting can be performed, and snow melting performance optimal for snowfall characteristics and usage conditions is demonstrated.
[0017]
  further,It detects the situation of vehicles, people, etc. and demonstrates snow melting performance according to the actual situation.
[0018]
  Claim2The invention described inA snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history As well as setting the methodIn the absence of a snowfall detection signal, in a preliminary operation in which the heating means is operated in advance based on other detection signals, a snowmelt device that adjusts the output of the heating means according to the usage history results in no snowfall detection signal. When the preliminary operation is performed in the time zone in which the usage frequency is high based on the usage history and it is determined that snow melting in a short time is necessary, the output of the heating means is increased so that the temperature of the snow melting panel is reduced in a short time. It is possible to perform preliminary operation for melting snow in a short time after detecting snowfall.
[0019]
  Claim3The invention described inA snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history As well as setting the methodBy using a snow melting device in which the temperature rise value due to preliminary operation is smaller than in other time zones, the usage frequency is low based on the usage history, and it is rarely used in the time zone when the usage history recording means does not use much. In the belt, by reducing the temperature rise value of the snow melting panel by the preliminary operation and maintaining it at a low temperature, it is possible to perform an energy saving operation in the preliminary operation until the actual snowfall is detected.
[0020]
  Claim4The invention described inSnow melting panel heated by heating means, and the snow melting panel Temperature detecting means for detecting the temperature of the air, outside air temperature detecting means for detecting the temperature of the outside air, snowfall detecting means for detecting the presence or absence of snowfall, and operation of the heating means based on the detection signal from each of the detecting means And a control unit that includes a use history recording unit that stores a use history of the snow melting panel, and sets an operation method of the heating unit according to the use history.Timekeeping meansHaveBased on the output signal, the temperature of the snowmelt panel in the preliminary operation is assumed in the daytime by assuming a snowmelting effect by sunlight by setting the temperature rise value in the preliminary operation to be lower in the daytime than that in the nighttime. By reducing the increase value, it is possible to perform more energy-saving operation.
[0021]
  Claim5The invention described inA snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history As well as setting the methodA snow melting device that recognizes a power stop time period during which no power is supplied to the snow melting device, and when it is determined that a preliminary operation is necessary until the power stop time zone, the temperature rise value due to the previous preliminary operation is increased according to the use history By recognizing the power outage time zone, and when it is determined that the preliminary operation is necessary until the power outage time zone, the preliminary increase in the temperature increase value of the snow melting panel by the previous preliminary operation according to the use history is performed. Do the driving. In this way, a small amount of snow can be melted in response to snowfall in a power supply stop time zone that has been used based on the use history, and it can be melted quickly immediately after the power stop time zone. Further, by this preliminary operation, snow can be melted quickly and appropriate operation can be performed at the time of power-off time and when snowfall is detected immediately after.
[0022]
  Claim6The invention described inA snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history As well as setting the methodWhen detecting the snowfall detection signal, if the temperature detection signal of the snow melting panel is higher than the outside air temperature detection signal, the temperature of the snow melting panel is detected by providing a snow melting device with a delay time until the heating means starts operating. When the signal is higher than the outside air temperature detection signal, the snow melting effect is exhibited with the temperature energy of the snow melting panel, and the heating means starts operating after the temperature of the snow melting panel falls below a predetermined temperature, so that more energy saving operation is possible. It can be carried out. In the preliminary operation, when the temperature of the snow melting panel is lower than the outside air temperature and equal to or lower than the predetermined temperature in the preliminary operation, the control means starts the operation of the heating means regardless of the presence or absence of snow, and sets the temperature of the snow melting panel from the outside air temperature. It can also be raised.
[0023]
  Claim7The invention described inA snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history As well as setting the methodBy having a plurality of operation modes corresponding to the usage frequency prediction and operating the heating means, it is possible to select an appropriate one according to the installation location and the use method from among the plurality of operation modes set. The driving method can be selected in advance. In other words, the control means has operation modes such as an operation mode that is frequently used in the daytime, an operation mode that is frequently used at night, and an operation mode that is used intensively at a specific time. It can be set in advance according to the actual situation. Therefore, since an appropriate heating means is operated according to the installation location, it is possible to quickly melt snow even during snowfall, which is comfortable and energy saving.
[0024]
  Claim8The invention described inA snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history As well as setting the methodBy changing the operation method of the heating means according to the preset operation mode to a snow melting device that corrects based on the usage history, it is possible to repeat the change to an appropriate operation according to the installation location of the device, and a more energy-saving operation method Realize.
[0025]
  Claim9The invention described inA snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history As well as setting the methodBy adopting a snow melting device that has a method for resetting the operation mode to the initial state, the operation mode setting change made by the control means and the operation mode correction contents based on the usage history can be discarded and reset to the initial state. It is possible to cope with changes in the user's life pattern, main purpose of use, and change in installation location.
[0026]
  Claim10The invention described inA snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history Set the methodThe heating means is a snow melting device that induction-heats a snow melting plate formed of a metal material with a heating coil, whereby the heating means directly heats the snow melting plate that accumulates snow, so that higher-speed snow melting is possible. In addition, the control means can respond appropriately to the time and usage history, and is excellent in both usability and maintenance costs.
[0027]
【Example】
  Embodiments of the present invention will be described below with reference to the drawings.
[0028]
  (Example 1)
  The snow melting apparatus in Example 1 of this invention is shown in FIGS. 1 to 3, the snow melting panel 1 has a linear heating means (heater) 2 using a heating wire as a heating means for supplying the amount of heat for melting snow, and a temperature detection means 3 for detecting the temperature of the snow melting panel 1. is doing. Moreover, the protective cover 7 which covers the heating means 2 from below is provided, and the heating means 2 is configured to be pressed against the heat generating portion on the upper surface of the snow melting panel 1. The protective cover 7 protects the plurality of heating means 2 arranged in a spiral shape, and has a gap (about 5 mm in this embodiment) from the installation surface. The snow melting panel 1 has a predetermined thickness as a whole (about 20 mm in this embodiment).
[0029]
  Further, an outside air temperature detecting means 4 for detecting the temperature of the outside air, a snowfall detecting means 5 for detecting the presence or absence of snowfall, a moving body detecting means 6 for detecting a car, a person or the like moving on the snow melting panel 1, and each detection Control means 8 for controlling the operation of the heating means 2 based on a detection signal from the means is provided. The snowfall detection means 5 and the moving body detection means 6 are provided with detection means applying an infrared sensor, but any detection method such as pressure or image may be used.
[0030]
  The control means 8 has time measuring means 8a for detecting the operation time and use history recording means 8b. As shown in FIG. 4, referring to the operation time and the use history, the preliminary operation of the heating means 2 and the main operation are performed. The operation method is set. As shown in FIG. 5, the operation time and the actual frequency of use are accumulated as the use history in the use history recording means 8b. Here, a situation is shown in which one day can be divided into a high usage frequency time zone B1 and a low usage frequency time zone B2 according to the usage frequency (according to times A and B and usage frequency N).
[0031]
  The control device 8 supplies power from the snow melting power 9 to the heating means 2 to heat the snow melting panel 1. The control device 8 is usually operated by supplying power from a normal power source. Reference numeral 10 denotes a place where the snow melting panel 1 is installed, and 11 denotes a state of snow accumulation.
[0032]
  Next, a method for operating the snow melting device in the present embodiment will be described. Here, when the automatic operation based on the detection signal of each detection means is started, the snowfall detection signal is obtained and the main operation is performed, but the operation is performed from the low use frequency time zone B2 to the high use frequency time zone B1. Assume that you have done so.
[0033]
  As shown in FIG. 6, the control device 8 starts the main operation t <b> 2 based on the snowfall detection signal of the snowfall detection means 5. Prior to this, if the temperature detecting means 3 of the snow melting panel 1 is equal to or lower than the temperature T2, the preliminary operation is performed, but here it is equal to or higher than T2 and the main operation t2 is immediately performed.
[0034]
  In the low usage frequency period B2, the control device 8 reduces the output of the heating means 2 and raises the temperature of the snow melting panel 1 at a relatively low speed. Snow melting is performed at the temperature T1, and an additional operation t3 after the end of snowfall is performed. As a result, it is possible to reliably melt snow and prevent refreezing of the snowmelt water. Thereafter, in the high usage frequency period B1 (after A in FIG. 6), when starting the main operation t2 based on the snowfall detection signal of the snowfall detection means 5, the output of the heating means 2 is increased, and the snow melting in a short time. The temperature of panel 1 is raised. Snow melting is performed at the temperature T1, and an additional operation t3 after the end of snowfall is performed. Similarly, the snow melts reliably to prevent refreezing of the snow melt water.
[0035]
  Further, as shown in FIG. 7, in the preliminary operation t1 in the low use frequency time zone B2, the control means 8 decreases the output of the heating means 2 and raises the temperature of the snow melting panel 1 at a relatively low speed. That is, in the preliminary operation t1, heating is performed at a lower output than in the main operation t2, and heating is performed at a high output after the snowfall is detected, and the main operation t2 and the additional operation t3 are performed to melt the snow. Since the temperature of the snow melting panel 1 rises in a short time, the snow can be melted appropriately in a short time, and useless energy consumption in the preliminary operation t1 can be suppressed.
[0036]
  Further, as shown in FIG. 8, in the preliminary operation t11, the control means 8 sets the temperature of the snow melting panel 1 to T4 in the low usage frequency time zone B2, and sets the temperature of the snow melting panel 1 to T3 in the high usage frequency time zone B1, T4 is set lower than T3. As a result, during snowfall in the high usage frequency period B1, snow melting can be started promptly and used comfortably. On the other hand, in the low usage frequency period B2, the snow melting panel 1 is kept at a low temperature, so that wasteful energy consumption in the preliminary operation t11 can be suppressed. Of course, since it is the snow melting panel 1 at the time of snowfall, snow melting can be started at an appropriate time.
[0037]
  (Example 2)
  FIG. 9 shows a snow melting apparatus in Embodiment 2 of the present invention. Since the basic configuration is the same as that of the first embodiment, the description thereof is omitted.
[0038]
  The control means 8 has an operation method of performing the preliminary operation t21 at the preliminary operation temperature at which the temperature of the snow melting panel 1 is higher than the other time zones at night based on the detection signal of the timing means 8a. That is, when comparing the preliminary operation temperatures in both time zones, the nighttime preliminary operation temperature T5 is higher than the daytime preliminary operation temperature T6. In this embodiment, daytime and nighttime are distinguished at 16:00 as an example, but the present invention is not limited to this.
[0039]
  In such an operation method, the control device 8 determines that there is almost no snow melting effect due to sunlight at night based on the detection signal of the time measuring means, and reserves at a preliminary operation temperature T5 higher than other time zones. Since the operation is performed, when the main operation t22 is subsequently executed based on the snowfall detection signal, the snow melting time can be shortened (t23 indicates an additional operation). Of course, it is possible to perform energy-saving snow melting by performing preliminary operation at a low preliminary operation temperature T6 in the daytime.
[0040]
  (Example 3)
  10 to 12 show a snow melting apparatus in Embodiment 3 of the present invention. Since the basic configuration is the same as that of the first embodiment, the description thereof is omitted.
[0041]
  As in the first embodiment, the snow melting device according to the present embodiment supplies power to the heating means 2 with the snow melting power 9 connected exclusively for the snow melting device, although it is common in cold regions. is there. As shown in FIG. 10, in the automatic operation, the control device 8 adjusts the operation method of the preliminary operation based on information on the operation time and the power stop time. And as shown in FIG. 11, it has the snow-melting power stop time zone Q in which power supply stops at a predetermined time within one day. This snow melting power stop time zone Q is usually set for about 2 to 5 hours including the evening. Moreover, the possibility of snowfall in this time zone, the passage of cars and people is a time zone that can occur frequently.
[0042]
  The operation method of the embodiment will be described with reference to FIG. The control device 8 starts the preliminary operation t41 based on the temperature detection signal that the temperature of the snow melting panel 1 has decreased to T2. As a result, the temperature of the snow melting panel 1 is raised to a predetermined temperature and held, and then the main operation t42 and the additional operation t43 are performed based on the snowfall detection signal to perform snow melting.
[0043]
  In this preliminary operation t41, the preliminary operation temperature is set with reference to the output signal of the time measuring means 8a. At this point, if it is determined that the snowmelt power stop time zone Q overlaps during the preliminary operation, the heating means 2 is operated to a relatively high preliminary operation temperature (temperature T1 or higher), and the preliminary operation t41 is performed. Thereafter, the snow melting power stop time zone Q is reached, and the temperature of the snow melting panel 1 is decreased by heat dissipation or melting snow.
[0044]
  When a snowfall detection signal is obtained immediately after the snowmelt power stop time period Q, the actual operation t42 is performed, and the temperature of the snowmelt panel 1 is rapidly increased to T1 to melt snow. Even after the snowfall detection signal is stopped, the additional operation t43 is subsequently performed to surely melt the snow and prevent refreezing of the melted water.
[0045]
  As described above, the temperature of the snow melting panel 1 is heated to the preliminary operation temperature higher than the temperature T1 in the normal main operation t42 by the snow melting power stop time period Q in the preliminary operation t41, and the temperature is maintained. Therefore, even if there is snowfall in the snowmelt power stop time zone Q, the effect that snow can be partially melted can be obtained. Therefore, the snow melting in the main operation t42 immediately after can be performed in a shorter time. Even in the snowmelt power stoppage time period Q, it is safe for vehicles and people to pass.
[0046]
  (Example 4)
  FIG. 13 shows a snow melting apparatus in Embodiment 4 of the present invention. Since the basic configuration is the same as that of the first embodiment, the description thereof is omitted.
[0047]
  In the third embodiment, the control means 8 has an operation method as shown in the figure, starts automatic operation, and sets the temperature of the snow melting panel 1 as the outside air temperature prior to the preliminary operation and the main operation. It is for comparison.
[0048]
  First, when a snowfall detection signal is detected in a state higher than the outside air temperature, the snowmelt detection panel 1 is left as it is until the temperature of the snow melting panel 1 decreases to a predetermined temperature. That is, there is a delay time td until the heating means 2 is operated, and an operation method for starting the operation of the heating means 2 after the temperature of the snow melting panel 1 becomes a predetermined temperature or less at the delay time td. To do.
[0049]
  The snow melting at the delay time td can be performed with almost no energy consumption. Even if such a delay time td is provided, the temperature in the preliminary operation and the main operation of the snow melting panel 1 can be quickly increased, and the necessary snow melting performance can be exhibited.
[0050]
  (Example 5)
  FIGS. 14-16 has shown the snow melting apparatus in Example 5 of this invention. Since the basic configuration is the same as that of the first embodiment, the description thereof is omitted.
[0051]
  In the fifth embodiment, the control means 8 has an operation method as shown in FIG. 14, starts automatic operation, precedes preliminary operation and main operation, and performs heating based on the set use mode. The operation method of the means 2 is controlled.
[0052]
  The control means 8 has a usage frequency prediction curve in which the usage frequency is predicted in advance for each driving time, and by selecting this, a plurality of operation modes corresponding to the usage frequency are performed.
[0053]
  That is, the control device 8 can select in advance an appropriate operation method according to the installation location and the usage method from among a plurality of operation modes. For example, as shown in FIG. 15, the control mode 8 has an operation mode 1 that is frequently used during the day, an operation mode 2 that is frequently used at night as shown in FIG. 16, and an operation mode 3 that is used concentrated on a specific time. There is an operation mode such as (not shown), and it can be set in advance according to the actual usage in an installation place such as a general home or a store. Since the control means 8 operates the heating means 2 appropriately according to the installation place 10, it can melt snow quickly even during snowfall, and is comfortable and energy saving.
[0054]
  B10 is a high usage frequency time zone, B20 is a low usage frequency time zone, and N is a usage frequency, which is the same as in the first embodiment.
[0055]
  Moreover, the control means 8 can correct the operation method of the heating means 2 in the preset operation mode based on the usage history. That is, the control means 8 changes the content of the operation mode according to the usage history. FIG. 17 shows an example in which the operation mode 1 corrects the operation time (time A to A1 and time B to B1) of the high usage frequency time zone B10 based on the actual usage history to obtain the high usage frequency time zone B11. Show. As described above, the control means 8 controls the operation method such as the capacity of the heating means 2 and the temperature of the snow melting panel 1 based on the use history. A more energy-saving operation method is realized by repeating the change to an appropriate operation according to the installation place 10.
[0056]
  Further, the control means 8 has a method for resetting the operation mode to the initial state. That is, the operation mode setting change and the operation mode correction contents based on the usage history performed by the control means 8 can be discarded and reset to the initial state.
[0057]
  Thus, the fact that the control means 8 has the resetting method to the initial state can provide a snow melting device that can cope with the change of the user's life pattern, the main purpose of use, the change of the installation location, and the like.
[0058]
  In each of the above embodiments, a heater is used as the heating means 2, but the heating portion of the snow melting panel 1 is formed of a metal plate made of a metal material, and a heating coil for induction heating the heating coil is used as the heating means. 2 is also acceptable. If comprised in this way, since the heating part of the snow melting panel 1 will be induction-heated, based on the detection signal of the time measuring means 8a, since the quick heating effect | action will be obtained by the output of the heating means 2, it will save energy in a shorter time. Can be performed in preliminary operation and main operation. Of course, the control means 8 serving as the basic configuration is also different from the above-described embodiment as a specific control circuit. However, it is a known technique to heat the metal plate by induction heating. Is omitted.
[0059]
  Moreover, even if the heating means 2 is not a heater or a heating coil in each of the above embodiments but is a hot water pipe through which a heat medium circulates, as long as the thin snow melting panel 1 can be realized, the same as in the above embodiments. It is also obvious that the effect of can be obtained.
[0060]
  In each of the above embodiments, the snow melting panel 1 of the snow melting device is configured to have a rectangular outer shape, but it may be circular, polygonal, or the like. In addition, since the external size of the snow melting panel 1 of an Example is 1: 2, it can be installed in a required area | region freely combining vertically and horizontally, but it is not limited to this, 1: 1, Various external sizes such as 1: 3 may be used.
[0061]
  Further, in each of the above embodiments, the snow melting panel 1 of the snow melting device is a case where the snow melting panel 1 is assumed to have a rectangular shape with an outer size of 50 cm in length and 100 cm in width, and these can be variously set. . There is no problem even if it is appropriately changed depending on the outer size, material, installation location, and the like.
[0062]
  Further, in each of the above embodiments, the snow melting panel 1 of the snow melting device is installed on the upper part of the existing pavement, but after excavating the pavement by the thickness of the snow melting panel 1, the surrounding pavement and Needless to say, the heights may be the same or slightly higher. Of course, depending on the state of the installation location, it goes without saying that the snow melting panel 1 of the snow melting device may be installed after excavating the roadbed portion and leveling the pavement as the installation location of the snow melting panel 1. In any case, the upper surface of the snow melting panel 1 may be exposed and formed as a snow melting device.
[0063]
  In each of the above embodiments, snowfall rarely occurs continuously for 24 hours, and often falls intermittently, such as falling from night to early morning and not falling during the day. Therefore, the operation of the snow melting device is often intermittent. In each case, the snow melting panel 1 is cooled once, but reheating can be performed in a short time. Therefore, since the power consumption of the snow melting panel 1 may be small, the running cost of the snow melting device is also low. That is, it is possible to melt snow in a short time, that is, with a small amount of power consumption, as compared with a conventional snow melting device buried in the ground. Therefore, considering the whole snow season, the use efficiency of energy in intermittent operation is high by increasing the surface temperature of the snow melting panel 1 in the snow melting device. It can be said that the snow melting device using the snow melting panel 1 exhibits a snow melting performance appropriate for the actual snowfall conditions and has high operation efficiency. That is, excellent snow melting performance is realized.
[0064]
  Further, in each of the above-described embodiments, for the state in which snowmelt water or rainwater remains on the upper surface of the snowmelt panel 1, a non-slip anti-slip finish layer having fine unevenness is formed, thereby preventing people and automobiles. It is a snow melting device that can be used with peace of mind throughout the year because it can prevent slipping. The anti-slip finishing layer may be applied to the surface of the snow melting panel 1 and finished with a paint containing a particulate mixture that exhibits an anti-slip effect (this impurity is also called aggregate). Further, the snow melting panel 1 itself may be provided with unevenness, or the anti-slip finishing layer itself may be a metal plate having unevenness. Moreover, although the anti-slip finish layer is formed on the entire surface of the snow melting panel 1, it is not limited to being formed on the entire surface, and even if it is a part, the effect can be sufficiently exhibited.
[0065]
  Moreover, in each said Example, although the snow melting panel 1 is formed with one metal plate, it is not limited to this. Various configurations such as a resin plate, a resin-metal multilayer plate, a metal-metal multilayer plate, and the like may be used, and while protecting the heating means, a thin member has a small heating capacity. The surface can be heated in a short time. For example, if a multi-layer plate of resin and metal is used, the anti-slip effect and the flow path of snowmelt water can be easily formed with the surface shape of the resin, and the strength against the load can be secured with the lower metal plate. Further, by using at least one layer as a metal material, even if various loads, particularly sharp objects, are pressed, strength can be obtained and damage to the heating element can be prevented. Furthermore, if a metal-metal multilayer board is used, it is possible to combine a metal material with high corrosion resistance at the upper part and a high-strength metal material at the lower part, and the required heating performance and durability can be obtained while being thin. Is.
[0066]
  In addition, the snow melting panel of the present invention is originally intended for melting snow, but since the whole can be heated uniformly and quickly, the floor surface of warehouses, workplaces, stores, etc. as well as floors of ordinary houses, It can also be used as a heating device that heats on the wall. In addition, it is obvious that it can be effectively used as a non-slip heating device on floors of food factories, kitchens, restaurants, etc. where water droplets often adhere.
[0067]
【The invention's effect】
  As described above, the present invention can provide a snow melting device that exhibits optimum snow melting performance in terms of snowfall characteristics and actual usage in cold regions by setting the operation method of the heating means according to the use history. It is.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part showing a basic configuration of a snow melting device in Embodiment 1 of the present invention.
FIG. 2 is a cross-sectional view of a main part of the snow melting panel of the first embodiment.
FIG. 3 is a plan view showing the snow melting panel of the first embodiment.
FIG. 4 is a flowchart showing an operation method of the snow melting device of the first embodiment.
FIG. 5 is a time chart showing a usage frequency history of the snow melting device of the first embodiment.
FIG. 6 is a time chart showing the temperature of the snow melting panel in the actual operation of the first embodiment.
FIG. 7 is a time chart showing the temperature of the snow melting panel in the preliminary operation of the first embodiment.
FIG. 8 is a time chart showing the temperature of the snow melting panel in the preliminary operation of the first embodiment.
FIG. 9 is a time chart showing the temperature of the snow melting panel in Embodiment 2 of the present invention.
FIG. 10 is a flowchart showing a method of operating a snow melting device in Embodiment 3 of the present invention.
FIG. 11 is a time chart showing supply of snowmelt power in the third embodiment.
12 is a time chart showing the temperature of the snow melting panel of Example 3. FIG.
FIG. 13 is a flowchart showing a method of operating a snow melting device in Embodiment 4 of the present invention.
FIG. 14 is a flowchart showing a method of operating a snow melting device in Embodiment 4 of the present invention.
FIG. 15 is a time chart showing the use frequency prediction of the operation mode 1 in the fourth embodiment.
FIG. 16 is a time chart showing the use frequency prediction of the operation mode 2 in the fourth embodiment.
FIG. 17 is a time chart showing the correction of the usage frequency of operation mode 1 in the fourth embodiment.
FIG. 18 is an external view showing the installation location of a conventional snow melting device.
FIG. 19 is a cross-sectional view of an essential part showing the installation structure of a conventional snow melting device.
FIG. 20 is a time chart showing the temperature of a conventional snow melting device.
FIG. 21 is a flowchart showing a method of operating a conventional snow melting device.
[Explanation of symbols]
  1 Snow melting panel
  2 Heating means
  3 Temperature detection means
  4 Outside air temperature detection means
  5 Snowfall detection means
  6 Moving body detection means
  8 Control means
  8a Timekeeping means
  8b Usage history recording means

Claims

A snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history A snow melting apparatus comprising a moving body detecting means for setting a method and detecting a moving body moving on the snow melting panel .

A snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history the method in the absence of snow detection signal and sets the other in a preliminary operation in advance to operate the heating means based on the detection signal, snow melting apparatus to adjust in accordance with the use history of the output of the heating means.

A snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history with the quiet time use record by use history recording unit, preliminary operation other time zones small Kushida snow melting apparatus than the temperature rise value by setting the process.

A snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history A snow melting device which has a time setting means and sets a method, and based on its output signal, a temperature rise value due to preliminary operation is set to be smaller in the daytime than in the nighttime.

A snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history When the power stop time zone in which power is not supplied to the snow melting device is recognized and it is determined that the preliminary operation is necessary until the power stop time zone, the temperature rise value due to the previous preliminary operation according to the usage history A snowmelting device with improved performance .

A snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history method upon detection snowfall detection signal sets a, when the temperature detection signal of the snow melting panel is higher than the outside air temperature detection signal, snow melting apparatus in which a delay time until starting the operation of the heating means.

A snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history a plurality operation modes corresponding to the use frequency prediction sets a method, snow melting apparatus for performing the operation of the heating means.

A snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history the method of operating the heating means according to a preset operation mode and sets the method, snow melting apparatus for positive Osamu based on usage history.

A snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history A snow melting device having a method and a method for resetting an operation mode to an initial state.

A snow melting panel heated by a heating means, a temperature detection means for detecting the temperature of the snow melting panel, an outside air temperature detection means for detecting the temperature of the outside air, a snowfall detection means for detecting the presence or absence of snowfall, and each of the detection means Control means for controlling the operation of the heating means based on the detection signal from the control means, the control means having a use history recording means for storing the use history of the snow melting panel, and the operation of the heating means according to the use history set the method, the heating means, induction pressurized heat snow melting apparatus with a heating coil snow melting plate formed of a metal material.