| 摘要 |
<p>Apparatus for controlling the temperature of a liquid in at least one vessel (14) comprises first heat exchanger (11) located inside the vessel through which heating fluid is circulated and a second heat exchanger (9) located inside the vessel through which coolant fluid is circulated. The temperature of the liquid in the vessel (14) is monitored by a temperature sensor (21) located inside the vessel (14). Control means (23) are provided to respond to the temperature sensor (21) in order to control the circulation of heating and coolant fluid through the first (11) and second (9) heat exchangers to control the temperature of the liquid in the vessel (14). The apparatus may be adapted to provide independent temperature control of a number of vessels and is particularly applicable to aquaria.</p> |
