摘要 |
FIELD: power-plant engineering, particularly cooling and microcryogenic equipment. ^ SUBSTANCE: microcooler comprises heat-insulated cylinder filled with gas and separated into cold and hot cavities with piston made of low-conductivity material. Heat-exchangers with cooling medium and medium to be cooled are arranged in the cavities. Piston is provided with regenerator and air-tightened drive shaft of electric engine having crank mechanism from hot cavity side. Drive is installed in sealed case fixedly connected to heat-insulated cylinder. Piston has throttle orifice and large orifice located from cold cavity side. The throttle orifice is provided with overflow valve communicated with cold cavity. Large orifice has overflow valve communicated with hot cavity. Cylinder interior is connected with compressed gas cylinder by means of controlled valve (reducer). Crank mechanism of engine additionally has tension spring. The first end of tension spring is connected to crankshaft neck of crank mechanism by means of additional connecting-rod. Another end thereof is fastened to inner section of sealed case so that above tension spring end is arranged in holder installed in place opposite to place of tightened shaft insertion in cylinder. ^ EFFECT: provision of stable drive operation, extended life and decreased vibrations during microcooler operation. ^ 1 dwg
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