摘要:
A low-temperature device for separating and purifying gas based on a small-sized low-temperature refrigerating machine includes a primary, secondary and quaternary heat exchanger, at least one small-sized low-temperature refrigerating machine, and at least one liquid collecting tank. The small-sized low-temperature refrigerating machine includes a first cold head and a second cold head, the secondary heat exchanger is provided on the first cold head to form a primary cold head heat exchanger, the quaternary heat exchanger is provided on the second cold head to form a secondary cold head heat exchanger, a mixed gas outlet is connected to an inlet of the primary cold head heat exchanger. By using primary and secondary cold heads of the small-sized low-temperature refrigerating machine as cold sources, gases having different condensing temperature are liquefied and solidified separately, and two or more gases can be separated and purified at a lower cost.
摘要:
A G-M refrigerator comprises a compressor (1), a gas inlet valve (2), an exhaust valve (3), a regenerator (4), a cylinder (5), a piston (6), a hot cavity (7), a cold cavity (8), a seal ring (9), a driving mechanism (10-12), an annular gap (13), a heat exchanger (14), an orifice valve (18) and a gas reservoir (19). By introducing a phase modulation mechanism, such as the orifice valve (18), the gas reservoir (19) and the like, the working way of gas in the annular gap (13) is changed to be the same with that of a pulse tube refrigerator with the phase modulation mechanism, expansion of the part of the gas is fully utilized for doing work so as to generate the cold effect, loss caused by gas leakage through the seal ring (9) is further eliminated and the performances of the G-M refrigerator are further improved.
摘要:
A low-temperature device for separating and purifying gas based on a small-sized low-temperature refrigerating machine includes a primary, secondary and quaternary heat exchanger, at least one small-sized low-temperature refrigerating machine, and at least one liquid collecting tank. The small-sized low-temperature refrigerating machine includes a first cold head and a second cold head, the secondary heat exchanger is provided on the first cold head to form a primary cold head heat exchanger, the quaternary heat exchanger is provided on the second cold head to form a secondary cold head heat exchanger, a mixed gas outlet is connected to an inlet of the primary cold head heat exchanger. By using primary and secondary cold heads of the small-sized low-temperature refrigerating machine as cold sources, gases having different condensing temperature are liquefied and solidified separately, and two or more gases can be separated and purified at a lower cost.
摘要:
A pulse tube refrigerator with an automatic gas flow and phase regulating device is composed by a helium compressor, an air distribution valve, a drive controller, a drive lead, a temperature sensor, a temperature measuring lead, a heat regenerator, a first-stage pulse tube, a second-stage pulse tube, a first-stage air reservoir and a second-stage air reservoir, wherein the air distribution valve is consisted of eight independent valves. According to received temperature signals from the temperature sensors the drive controller transmits order signals to the eight independent valves so as to control the open/close degree, time and sequence of the eight valves of the air distribution valve.
摘要:
The invention relates to a pulse tube refrigerator with an automatic gas flow and phase regulating device, comprising a helium compressor (1), an air distribution valve (11), a drive controller (9), a drive lead (10), a temperature sensor, a temperature measuring lead (8), a heat regenerator, a first-stage pulse tube (5), a second-stage pulse tube (6), a first-stage air reservoir (14) and a second-stage air reservoir (15), wherein said air distribution valve (11) comprises eight independent valves of a first valve (21), a second valve (22), a third valve (23), a fourth valve (24), a fifth valve (25), a sixth valve (26), a seventh valve (27) and an eighth valve (28). The invention can automatically regulate the flow and phase of the air flow entering the heat regenerator or the pulse tube in accordance with the refrigeration condition changes so as to regulate the performance of the refrigerator, maintain an optimized working state of the refrigerator and enhance the efficiency of the refrigerator and the stability of the cooling temperature.