| 摘要 |
PURPOSE:To sharply prevent an overrun and a cycling and extensively establish a temperature range to always make its visible indication possible by providing a three way valve to divide fluid passing through a heat generating source into a cooler and a bypass circuit, a thermistor temperature detecting element, and LED indicator. CONSTITUTION:A three way valve 100 divides fluid flowing out of a engine 124 into a cooler 130 and a bypass 134 which is connected to a return conduit 132. The first port 102 of the three way valve 100 receives heated fluid, and its second port 104 and third port 106 communicate with the cooler 130 and the bypass 134 respectively. In this case, the opening shape of the second and third ports 104, 106 of the three way valve 100 is determined so that a definite relationship may be given between the opening angle and area of a rotary valve body 114. Consequently a signal according with a fluid temperature is inputted into the piston positioner 300 of a pneumatic cylinder 200 through a thermistor temperature detecting element 400 and LED conversion indicator 500, in addition an electric current/air pressure converter 600 to automatically actuate the rotary valve body 114. |
