| 摘要 |
A freeze-resistant hydrant (10, 110) extending between a first area having a temperature at least intermittently below freezing and a second area having a temperature constantly above freezing including, a heat-transfer tube (20, 120), a first end (21, 121) of the heat-transfer tube proximate the first area, a second end (22, 122) of the heat-transfer tube extending into the second area, a water line (35, 135) interposed within the heat-transfer tube from a location within the second area to the first end of the heat-transfer tube, a control valve (50, 150) on the, water line in proximity to the heat-transfer tube, and a heat-transfer fluid (R,R) in the heat-transfer tube for transferring heat from the second end of the heat-transfer tube to the control valve.
|
