发明名称 |
Solid state liquid level sensor and pump controller |
摘要 |
A liquid level controller for a device having a liquid reservoir includes a control board and a reservoir assembly. The reservoir assembly is disposed within the reservoir and includes a liquid level sensor, which is electrically connected to the control circuit. The control board includes a control circuit and a pump. The control circuit has a control circuit and a resistive power supply to power the control circuit. The control circuit controls the pump in response to signals from the level sensor and includes a CMOS logic gate and a MOSFET transistor to switch the pump. The control circuit further includes a second resistive power supply connected to a relay which controls an alarm. The second power supply is activated by a transistor responsive to an alarm signal from the level sensor, and powers the relay only when the alarm signal is present.
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申请公布号 |
US6499961(B1) |
申请公布日期 |
2002.12.31 |
申请号 |
US20000696905 |
申请日期 |
2000.10.26 |
申请人 |
TECUMSEH PRODUCTS COMPANY |
发明人 |
WYATT ARNOLD G.;TERRY ROBERT L. |
分类号 |
F04B49/025;G05D9/12;(IPC1-7):F04B49/00 |
主分类号 |
F04B49/025 |
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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