发明名称 |
Limit switch control especially for warm air furnaces |
摘要 |
A control system to control the operation of a furnace (10) having a fuel control unit (26) to supply fuel to a burner (24) includes a limit switch (48) within furnace (10) to detect an overheated condition. The limit switch (48) opens when a reference temperature is reached, shutting down the furnace (10). A logic unit (40) senses the state of the limit switch (48) and measures the shutdown period, and notes whether the shutdown period exceeds a predetermined interval. The logic unit (40) opens a lockout switch (38') that controls the fuel control unit (26) if the furnace is subject to a number of consecutive prolonged shutdowns that exceeds a predetermined limit.
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申请公布号 |
US5377909(A) |
申请公布日期 |
1995.01.03 |
申请号 |
US19930165354 |
申请日期 |
1993.12.10 |
申请人 |
CONSOLIDATED INDUSTRIES CORP. |
发明人 |
KIRKPATRICK, MICHAEL E. |
分类号 |
F23N1/06;F23N5/24;G05D23/19;(IPC1-7):F23N5/20 |
主分类号 |
F23N1/06 |
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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