Noritz Corporation

Kozo Uehara

Tetsurou Hamada

Hitoshi Hara

Hideaki Yoshitomi

Hiroaki Takashima

Kazuhiro Kimura

Koji Shimomura

Hidenori Hata

Shingo Kimura

Akinobu Nakamura

Minoru Ikuta

Hideya Suyama

Shunji Tanba

Atsushi Yoshimoto

Masaaki Kumon

Mitufuku Asakawa

Satoshi Nakai

Noriyuki Kuribayashi

Kazuya Kawauchi

Takuji Saiki

Naomi Tanaka

A tube spacer S formed by bending a wire, includes a plurality of projectionsand a base-bending portion. Each of the projectionsis inserted between tubes, and has a pair of extending portionsextend in X direction and a front-bending portionfor connecting both front ends of the pair of extending portions. The base-bending portionconnects both rear ends of the projectionsso that the projectionsare arranged at interval in Z direction. With this structure, manufacturing cost for the tube spacer S can be low, and the tubes can be stably supported.

Tube spacer, method of manufacturing the same, and heat exchanger

A heat exchanger Aincludes a partitionpartitioning the spacesurrounded by a coiled tubeat an axially intermediate portion of a housinginto a first and a second regionsandand partitioning the coiled tubeinto a first and a second heat exchanging portions HTand HT. The combustion gas supplied to the first regionflows to a combustion gas pathby passing through a clearanceof the first heat exchanging portion HTand then passes through a clearanceof the second heat exchanging portion HT. With this structure, the amount of heat recovery is increased, and the heat exchange efficiency is enhanced while simplifying the overall structure of the heat exchanger Aand reducing the size of the heat exchanger.

Heat exchanger and water heater

A heat exchanger Aincludes a coiled tubeincluding a plurality of loopsand a spacesurrounded by the coiled tubeand having an end closed by a partitionThe heat exchanger is so designed that combustion gas flows from the spaceto a combustion gas pathby passing through clearancesof the loopsof the coiled tubeThe loopsare made of a tube having a thickness tand a width Lwhich is larger than the thickness, so that the amount of heat recovery when the combustion gas passes through the clearancesis large. Therefore, the heat exchange efficiency is enhanced while simplifying the overall structure of the heat exchanger Aand reducing the size of the heat exchanger.

An ignition unit promotes the efficiency of assembly because connections on the high voltage output side and the ground side are completed by a single operation, when an ignition electrode part and a main unit are connected together directly. A guide rail of the main unit is insertion-engaged into a slit between clamp pieces of a bracket so that the main unit is mounted onto the bracket. With the insertion engagement, a high voltage output terminal receives therein a high voltage input terminal of a spark plug supported by the bracket, a plate terminal which is a part of the bracket is driven into a ground-side connection terminal, and a convex portion of a projected piece is engaged into an engagement hole, for positioning and slipping-off prevention.

Ignition unit

Disclosed is a burner head capable of securing heat resistance and durability characteristics and improving the quality of machining at the same time, capable of easily and stably machining a material into a complicated shape. A second metal primary material of the iron family having high workability and first metal primary materials of the SUS family having high heat resistance are rolled out. Their side plate ends are butt-welded by laser to form a one-piece metal flat-plate material. A press molding machine is operated to press mold recessed portions of a pair of plate members simultaneously with cutting along a contour line. Then, folding is carried out, and they are closely joined together. A gas passage is formed by a recessed portion of the second metal primary material section. A burner port is formed by a recessed portion of the first metal primary material section.

Burner head and gas burning appliance provided with such a burner head

Growing community of inventors

Hyogo, Japan

Kozo Uehara