Low-energy-consumption temperature-control Dewar flask
A low energy consumption, Dewar bottle technology, applied in radiation pyrometry, measuring devices, instruments, etc., can solve the problem of high energy consumption, achieve the effect of reducing a large amount of consumption and avoiding direct cooling
Inactive Publication Date: 2012-07-18
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology
[0003] The technical problem solved by the present invention is that there is a problem of excessive energy consumption in the way of controlling the temperature through the heating resistor, while the method of controlling the injection amount of liquid nitrogen by using the heating resistor and the sliding rod at the same time has the problem of complicated and inaccurate temperature control question
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[0012] Below in conjunction with accompanying drawing and example the present invention is further described.
[0013] exist figure 1 middle, figure 2 The entire temperature control module is installed on the side of the Dewar, where the Dewar transition cold block 1-6 is directly in contact with the liquid nitrogen in the Dewar, and the temperature measuring element 1-7 and the heating plate 1-3 pass through the temperature measuring interface 1-3 It is connected with the heating interface 1-4 and the Dewar temperature controller 1-5, and the whole Dewar adopts vacuum sealing welding, and the temperature controller 5 can be used to control the temperature by pouring liquid nitrogen into the Dewar after vacuum exhaust.
[0014] exist figure 2 , the Dewar transitional cold block 1-6 and the Dewar cold block 1-5 are fixed together by means of countersunk screws, and then the low heat conduction plate 1-4 and the heating plate 1-5 are installed on the Dewar cold block 1-5 in ...
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The invention relates to a low-energy-consumption temperature-control Dewar flask. A vacuum sealing container consists of internal and external metal cylinders; the lower side surface of the internal cylinder is provided with a low-heat-transfer plate, a heating piece, a Dewar cooling surface, a temperature measuring element and wiring terminals in sequence; and a current output type PID (proportion integration differentiation) temperature controller is connected with the internal cylinder. The Dewar flask adopts the low-heat-transfer plate so as to avoid direct temperature reduction of the cold amount of the internal cylinder to the cooling surface. The low-energy-consumption temperature-control Dewar flask has the advantages of accuracy in temperature control, wide temperature control range, less liquid nitrogen loss and convenience in use, and is especially applicable to variable-temperature performance test of infrared detector chips or components.
Description
technical field [0001] The invention relates to a Dewar bottle, in particular to a temperature-controlled Dewar with low energy consumption. Background technique [0002] At present, infrared detectors are generally installed in Dewar bottles for use, and liquid nitrogen is poured into the Dewar bottles to improve the detection sensitivity of the detectors. In use, it is often necessary to know the relationship between detector sensitivity and temperature. Commonly used to achieve the working range of 100-170K temperature range, which requires a temperature-controlled Dewar to achieve. The general temperature-controlled Dewar is realized in two ways: the first is to add a Heating resistance, the second type is combined with heating resistance, and at the same time, a lifting slide rod is installed in the liquid filling cylinder to control the injection amount of liquid nitrogen. The first way is to increase the temperature by resistance heating. Since the cold surface is cl...
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IPC IPC(8): G01J5/02
Inventor 陈安森汪洋
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI