| 发明名称 |
Thermal type flow sensor |
| 摘要 |
<p>The invention relates to a flow rate measuring element (1) of a thermal type flow sensor is placed in the fluid to be measured. The element includes: a first heating resistor (7) for measuring a flow rate; a second heating resistor (10) for heating a support (5) for the first heating resistor (7); and current control circuits (101, 102) and which control heating resistor supply current so that the temperature of the second heating resistor (10) is higher than the temperature of the first heating resistor (7).</p> |
| 申请公布号 |
EP2058633(A1) |
申请公布日期 |
2009.05.13 |
| 申请号 |
EP20090001884 |
申请日期 |
2007.04.12 |
| 申请人 |
HITACHI LTD. |
发明人 |
SUKEGAWA, YOSHIHIRO;TOKUYASU, NOBORU;KASHIO, KAORI;TERADA, DAISUKE |
| 分类号 |
G01F1/69;G01F1/692;G01F1/696;G01F1/699 |
主分类号 |
G01F1/69 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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