| 摘要 |
<p>A transfer valve operative in response to variation in temperature at two predetermined setting points includes a valve member slidable in a valve passage which is provided with an output passage and two input passages. The valve member is divided into two sections coupled to each other with an intermediate rod member. One of the valve sections is provided by a through hole extending axially and one of the input passages is provided with a branch passage opened to a different position from that of the input passage from which it branches off. The valve passage is provided at one end thereof with an thermal expansible wax chamber bounded with a diaphragm. The valve member is slided axially in the valve passage by the force of expansion of the wax in one direction and by a force of a compression spring in the opposite direction.</p> |
