Chilled-mirror dew-point hygrometer based on Stirling low temperature refrigerator
A technology of low-temperature refrigerators and refrigerators, applied in refrigerators, refrigeration and liquefaction, compressors, etc.
Inactive Publication Date: 2013-04-03
CHANGZHOU HONGYUAN POWER TECH
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[0003] In view of the shortcomings of the traditional chilled mirror dew point meter in the above technology, such as low precision, high power consumption, and limited application range, the present invention proposes a Stirling low-temperature Chilled Mirror Dew Point Meters for Refrigerators
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[0010] The light path and air path are focused on 6 detection mirrors. The parallel light beams are sent to the detection mirror through the 2 light input channels, and are reflected back to the 3 optical output channels in parallel through the mirror. The sensor in the optical output channel collects the light intensity and sends it to the 1 control system at a set frequency; The gas path input channel blows to the detection mirror at a certain pressure and flow rate, and flows out from the 5 gas path output channels.
[0011] 7 The Stirling refrigerator is controlled by the control system and driven by the 8 intelligent power supply to start cooling. When the temperature is slightly lower than the dew point (the temperature when the water vapor in the gas is saturated), the saturated water vapor in the gas will condense into dew and adhere to The dew on the mirror surface of the cold head causes diffuse reflection of the parallel light irradiated on the detection mirror surf...
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The invention relates to a dew-point detecting device of industrial gas, and in particular relates to a high precision detecting device which adopts a small-sized Stirling refrigerator as the cold source, a cold head of the refrigerator as a detection mirror and optical detection as the technique. The dew-point detecting device disclosed by the invention mainly consists of four main parts, namely, a gas path, a light path, a Stirling refrigerator and a control system, and the signal detection, precise temperature control and refrigeration and dew-point value displaying and locking in the whole measurement process are accomplished under the cooperation of the system. The dew-point detecting device is characterized in that the small-sized Stirling refrigerator is used as the cold source, the detection mirror is directly arranged on the cold head of the refrigerator or is integrally made, and the dew-point of the industrial gas is precisely and efficiently measured through the control system. By utilizing the dew-point detecting device, practical application problems that a traditional dew-point hygrometer is large in size, poor in detection precision and the like, are solved; and the usage occasion and the range of the chilled-mirror dew-point hygrometer are greatly expanded due to the fact that the limit of modes such as liquid nitrogen, high pressure throttle gas refrigeration, semiconductor refrigerator refrigeration and mixed working medium refrigeration in convenience, size, power consumption and weight are avoided.
Description
technical field [0001] The invention relates to a dew point detection device for industrial gases, in particular a high-precision detection device using a small Stirling refrigerator as a cold source, a cold head of the refrigerator as a detection mirror, and optical detection as a technical means. technical background [0002] Traditional chilled mirror dew point meters have long relied on liquid nitrogen, high-pressure gas throttling refrigeration, semiconductor cooling, and mixed refrigerant refrigerators as cold sources. The volume of the liquid nitrogen container is large, the installation is limited, the liquid nitrogen consumption is fast during the measurement process, and the cooling speed is difficult to control, resulting in low detection accuracy and detection efficiency of the dew point meter, and it is not easy to obtain in some industrial occasions; the high-pressure gas throttling refrigeration volume is large , The use time is short; the semiconductor refrig...
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IPC IPC(8): G01N21/49F25B9/14
Inventor 梁文清刘向波姜涛
Owner CHANGZHOU HONGYUAN POWER TECH