| 摘要 |
A television image receiver (1) includes: an internal pressure regulating valve (5) provided above a tightly sealed cabinet (2), for allowing ventilation inside and outside the cabinet (2); and moisture adjusters (7), each having a moisture absorbing function, fixed inside the cabinet (2). The internal pressure regulating valve (5) includes a ventilation filter (6), which allows air and water vapor to pass therethrough but prevents water from permeating therethrough, inside a valve body (50). The internal pressure regulating valve (5) alleviates change in pressure inside the cabinet (2). Water vapor outside the cabinet (2) enters the cabinet (2) through the internal pressure regulating valve (5). When a temperature inside the cabinet (2) is decreased, the moisture adjuster (7) absorbs the water vapor to decrease the relative humidity, thus preventing occurrence of condensation. |
