Temperature testing device provided with sample-receiving chamber from which a specimen is easily detachable and in which temperature is controllable

Claim 1

A temperature testing device comprising: (a) a vacuum vessel; (b) an elongated vertical chamber adapted to receive a sample, substantially most part of which is inserted into said vacuum vessel and having an opening with a cap exposed outside said vacuum vessel; (c) a refrigeration unit with a cooling portion which is provided in said vacuum vessel; (d) a pump which is provided outside said vacuum vessel and is used for circulating a gaseous refrigerant; (e) a first pipe which connects the outlet side of said pump to a gas inlet provided in the vicinity of the bottom of said sample-receiving chamber while passing through a heat exchanger provided on said cooling portion of said refrigeration unit and passing through a temperature control means so that said gaseous refrigerant expelled from said pump is supplied to said sample-receiving chamber; and (f) a second pipe which connects a gas outlet provided substantially in an intermediate portion of said sample-receiving chamber in the lengthwise direction thereof to a inlet side of said pump so that said gaseous refrigerant in said sample-receiving chamber is returned to said pump.