| 摘要 |
An apparatus for measuring the melting and boiling points of gas has a heat insulating tank, an inner tank within the insulating tank, a sample cell within the inner tank with a sample gas temperature measuring system. A piping system is provided having a heating route and a cooling route. The heating route has a heating flow rate control valve and a heating heat exchanged heated by a heating source connected in series with the control valve. The cooling route has a cooling flow rate control valve and a cooling heat exchanger connected in series with the cooling flow rate contorl valve. The heating and cooling routes are in parallel. The heating source for heating the heat exchanger has a Joule-Thomson expansion valve while the cooling part for cooling the cooling heat exchanger is coupled to a compressor for compressing and supplying a refrigerant such as Freon.
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