发明名称 |
Spa pressure sensing system capable of entrapment detection |
摘要 |
A safety circuit for use with a spa system includes a pressure sensor which generates a signal representative of the pressure in the system. The safety circuit provides a constant current to the pressure sensor. A microcontroller is coupled to receive the signal from the sensor and is configured to store a first pressure level. The microprocessor compares the first pressure level with the subsequently measured pressure level and generates a control signal if the comparison indicates a change in pressure which exceeds a predetermined amount. The control signal is sent to a spa control circuit. An electronically controlled switch is coupled to receive the control signal from the microcontroller and turn electrical power to the pump off in response thereto.
|
申请公布号 |
US6390781(B1) |
申请公布日期 |
2002.05.21 |
申请号 |
US20000708201 |
申请日期 |
2000.11.07 |
申请人 |
ITT MANUFACTURING ENTERPRISES, INC. |
发明人 |
MCDONOUGH WILLIAM B. |
分类号 |
A63B69/12;A47K3/00;A61H33/00;F04D15/00;(IPC1-7):F04B49/06 |
主分类号 |
A63B69/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|