JP2012233677A5

JP2012233677A5 -

Info

Publication number: JP2012233677A5
Application number: JP2011271898A
Authority: JP
Filing date: 2011-12-13
Publication date: 2014-04-24
Anticipated expiration: 2031-12-13

Description

前記従来の課題を解決するために、本発明の熱交換器は、
入水口と出水口を具備したケーシングと、
発熱抵抗体を内蔵し鉛直方向に対して略平行に配置されていて互いに対向する２つの主面を伝熱面として有する平板状ヒータと、
前記平板状ヒータの前記２つの伝熱面の夫々に沿って前記平板状ヒータの下端から上端まで液体を導く流路スペースと、
前記入水口と前記流路スペースとの間に設けられたヘッダ部と、
を備え、
前記ヘッダ部は、
ヘッダ部主流路と、
流路断面積が広い前記ヘッダ部主流路から流路断面積が徐々に狭くなるヘッダ部絞り流路と、を有し、
前記ヘッダ部絞り流路の出口は、前記流路スペースに収容された前記平板状ヒータの下端面に対向して延在方向に延びるように開口されている（請求項１）。
In order to solve the conventional problems, the heat exchanger of the present invention is
A casing having a water inlet and a water outlet;
A plate-like heater having a heating resistor and having two main surfaces facing each other as a heat transfer surface, arranged substantially parallel to the vertical direction;
A flow path space for guiding liquid from the lower end to the upper end of the flat heater along each of the two heat transfer surfaces of the flat heater ;
A header portion provided between the water inlet and the flow path space;
With
The header part is
A header main flow path;
A header section throttle channel in which the channel cross-sectional area gradually narrows from the header section main channel having a wide channel cross-sectional area ;
The outlet of the header throttle channel is opened to extend in the extending direction so as to face the lower end surface of the flat heater accommodated in the channel space .

つまり、ヘッダ部絞り流路で通路断面積が徐々に狭くなるように構成されており、ヘッダ部絞り流路での流速が先に行くほど次第に速くなるため、気泡が途中に取り残されることはなく高められた流速で平板状ヒータの下端面に流れ込み、平板状ヒータの両側面の流路スペースが上下流で構成された熱交内部に流入するため、気泡は平板状ヒータの下端から上端を経て熱交上部へスムーズに流出される。 In other words, it is configured so that the passage cross-sectional area gradually decreases in the header throttle channel, and the flow rate in the header throttle channel gradually increases as it goes first, so bubbles are not left in the middle. flows into the lower end face of the plate-shaped heater at elevated flow rates, to flow into the heat交内portion flow path space on both sides is composed of upstream and downstream of the flat heater, it bubbles through the upper end from the lower end of the flat plate heater It smoothly flows out to the upper part of heat exchange.

Claims

A casing having a water inlet and a water outlet;
A plate-like heater having a heating resistor and having two main surfaces facing each other as a heat transfer surface, arranged substantially parallel to the vertical direction;
A flow path space for guiding liquid from the lower end to the upper end of the flat heater along each of the two heat transfer surfaces of the flat heater ;
A header portion provided between the water inlet and the flow path space;
With
The header part is
A header main flow path;
A header section throttle channel in which the channel cross-sectional area gradually narrows from the header section main channel having a wide channel cross-sectional area ;
The outlet of the header throttle channel is a heat exchanger opened to extend in the extending direction so as to face the lower end surface of the flat heater accommodated in the channel space .

The channel space is composed of an inlet-side channel that is a region having a thin channel thickness near the lower header portion throttle channel and an outlet-side channel that is a region having a thick channel thickness near the upper outlet. The heat exchanger according to claim 1.

The flat plate heater is formed such that a heat generation density facing a flow path space on the side close to the water outlet is smaller than a heat generation density facing a flow path space on the side close to the header section throttle flow path. 2. The heat exchanger according to 2.

The flat heater is a ceramic heater comprising a ceramic substrate, a heating resistor formed by pattern printing a resistor on the ceramic substrate, and an electrode, and the heater line width of the printed pattern is the water inlet 4. The heat exchanger according to claim 3, wherein a portion facing the flow passage space on the side closer to the water outlet is formed thicker than a portion facing the flow passage space on the header portion restricting flow passage side close to.

The flat heater is a ceramic heater comprising a ceramic substrate, a heating resistor formed by pattern printing of a resistor on the ceramic substrate, and an electrode, and a gap between lines of the printed pattern is the front. The heat exchanger according to claim 3, wherein a portion facing the channel space on the side close to the water outlet is formed wider than a portion facing the channel space on the header throttle channel side near the entry water port.

The heat exchanger according to any one of claims 1 to 5, wherein a vertical guide rib is provided on the header portion.