| 摘要 |
<p>A temperature and pressure control system for a water bed is provided and includes a temperature control circuit and a pressure control circuit. The temperature control circuitry consists of two temperature detecting elements for detecting an ambient air temperature and the mattress temperature, respectively. The detected temperatures are compared with each other and the resulting value, together with a set value from an adjusting circuit, are processed by a microprocessor to produce a target temperature. When the target temperature is higher or lower than the mattress temperature, a heater is turned on or off, respectively, so that the mattress can be maintained at a value set according to a user's preferred temperature. The pressure control circuitry consists of a pressure detecting element for detecting the air pressure within air chambers of the mattress. A signal representing the detected pressure is amplified and is converted to a digital signal by an analog-to-digital conversion circuit, to produce a pressure value. When the pressure value is higher or lower than a preset pressure value, a relief valve or an air pump is actuated to deflate or inflate the mattress, respectively, to maintain a mattress softness most preferred by a user.</p> |
