CN202709542U - Refrigerating system of cold-mirror type dew point tester - Google Patents
Refrigerating system of cold-mirror type dew point tester Download PDFInfo
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- CN202709542U CN202709542U CN 201220352376 CN201220352376U CN202709542U CN 202709542 U CN202709542 U CN 202709542U CN 201220352376 CN201220352376 CN 201220352376 CN 201220352376 U CN201220352376 U CN 201220352376U CN 202709542 U CN202709542 U CN 202709542U
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Abstract
The utility model discloses a refrigerating system of a cold-mirror type dew point tester. The refrigerating system is used for refrigerating and heating a mirror surface of a measuring head and is characterized by comprising a stainless steel liquid nitrogen cylinder and an electric heating rod arranged in the stainless steel liquid nitrogen cylinder, where a liquid nitrogen pipe is connected with the stainless steel liquid nitrogen cylinder and a nitrogen inlet of a refrigerating body, and the heated liquid nitrogen is sprayed out from the liquid nitrogen pipe after being gasified, enters the refrigerating body through the nitrogen inlet and then flows out of a liquid nitrogen outlet after transferring most of cold quantity to the refrigerating body; a thermoelectric refrigerator is closely clung to the upper side of the refrigerating body so that the cold quantity of the refrigerating body is transferred to the thermoelectric refrigerator in a lossless manner; and the mirror surface is arranged above the thermoelectric refrigerator, and the thermoelectric refrigerator controls the temperature reduction speed of the mirror surface under the condition of a CPU (Central Processing Unit). The refrigerating system of the cold-mirror type dew point tester, provided by the utility model, has the advantages of strong refrigerating capability, small size, low manufacturing cost, simpleness and convenience for operation and suitability for industrial field service.
Description
Technical field
The utility model relates to a kind of measuring instrument for gas analysis, in particular for micro-moisture in the measurement gas, for the refrigeration system on the dew point tester of analyzing the gases such as nitrogen, oxygen, helium, argon, air and sulfur hexafluoride.
Background technology
Along with industrial circle is more and more higher to the various high-purity gas requirements of using, the analysis and detection technology of gas purity also obtains more attention.Concerning high-purity gas, its major impurity is take trace water as main, and detection method adopts electrolysis, sensor method and Cold Mirrors method usually.Front two kinds of methods are mainly used in the gas purity certainty of measurement and require not too high occasion.
Adopt the instrument of Cold Mirrors method measuring principle to be referred to as dew point hygrometer, so-called dew point refers to the gradually cooling in the constant situation of vapour pressure of given air, in this course, steam condenses into dew gradually, this adiabatic condensation temperature point is called dew point, says definitely to should be thermodynamic dew-point temperature, under this temperature, the moisture content that airborne moisture content exactly equals that this air reaches when saturated, dew-point temperature usually is used for representing trace water contained in the gas.Cold Mirrors method measuring principle is based upon on this theoretical foundation, and it has degree of accuracy height, the characteristics that measurement category is wide.The Cold Mirrors dew point hygrometer generally can be used as the secondary measurement criteria and calibrates the gas trace water tester of being made by electrolysis and sensor method.But be subject to the restriction of Refrigeration Technique and environment for use, be difficult to accomplish carry out in-site measurement in portable mode.
The utility model content
In order to overcome the technical problem that exists in the above-mentioned prior art, the utility model provides a kind of refrigeration system for the chilled-mirror type dew point tester, and refrigerating capacity is strong, and volume is little, cost is low, easy and simple to handle, is suitable as industry spot and uses.
In order to reach above-mentioned utility model purpose, the technical scheme that the utility model adopts is as follows:
A kind of refrigeration system of chilled-mirror type dew point tester, for the gage outfit minute surface being freezed and heating, comprise: stainless steel liquid nitrogen bottle and interior electrically heated rod thereof, the liquid nitrogen conduit connects the nitrogen inlet of stainless steel liquid nitrogen bottle and refrigeration body, spray from the liquid nitrogen conduit behind the liquid nitrogen gasification of heating, enter the refrigeration body by nitrogen inlet, flow out from liquid nitrogen outlet again after most of cold is passed to the refrigeration body; TEC is close to refrigeration body top, so that the break-even TEC that is delivered to of cold of refrigeration body; Minute surface is installed on the top of TEC, the cooling rate of TEC control minute surface under CPU control.
Described refrigeration body comprises three-decker, and internal layer refrigeration body, outer refrigeration body and heat-insulation layer from the ejection of liquid nitrogen conduit, at first enter the internal layer refrigeration body of instrument internal three-decker behind the liquid nitrogen gasification of heating by the nitrogen inlet of refrigeration body; The gasification liquid nitrogen passes to internal layer refrigeration body with most of cold, then enters outer refrigeration body; Final gasification liquid nitrogen flows out from the liquid nitrogen outlet after more most of cold being passed to the refrigeration body; Described outer refrigeration body is sealed by heat-insulation layer.
The refrigeration system of chilled-mirror type dew point tester disclosed in the utility model, owing to take liquid nitrogen and semiconductor thermoelectric refrigeration device compound-refrigerating technology, refrigerating capacity can reach below-100 ℃, automatically regulates cooling rate in whole measurement category.Refrigerating capacity is strong, and volume is little, cost is low, easy and simple to handle, is suitable as industry spot and uses.
Description of drawings
Fig. 1 is refrigeration system embodiment block diagram disclosed in the utility model.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the technical solution of the utility model is done a detailed explanation:
Fig. 1 is the utility model refrigeration system embodiment block diagram.Be comprised of two parts: a part is the refrigeration body of stainless steel liquid nitrogen bottle 1, electrically heated rod 2, liquid nitrogen conduit 3 and three-decker, and another part is comprised of TEC 9.Specifically comprise: stainless steel liquid nitrogen bottle 1, the electrically heated rod 2 that is positioned at stainless steel liquid nitrogen bottle 1, the liquid nitrogen conduit 3 that connects stainless steel liquid nitrogen bottle 1 and refrigeration body, nitrogen inlet 4, internal layer refrigeration body 5, outer refrigeration body 6, heat-insulation layer 7, nitrogen outlet 8, TEC 9 and minute surface 10.When dew point tester is measured, CPU opens the electrically heated rod 2 that is positioned at stainless steel liquid nitrogen bottle 1 by the heating rod control circuit in the tester first, from 3 ejections of liquid nitrogen conduit, at first enter the internal layer refrigeration body 5 of the inner three-decker of refrigeration body by the nitrogen inlet 4 of refrigeration body behind the liquid nitrogen gasification of heating; The gasification liquid nitrogen passes to internal layer refrigeration body 5 with most of cold, then enters outer refrigeration body 6, keeps the temperature of internal layer refrigeration body 5 in the time of the recycling cold; Final gasification liquid nitrogen flows out from liquid nitrogen outlet 8 after more most of cold being passed to the refrigeration body.Outer refrigeration body 6 is sealed up by heat-insulation layer 7, prevent cold to external radiation.TEC 9 is close to refrigeration body top, so that the break-even TEC 9 that is delivered to of cold of refrigeration body; Minute surface 10 is installed on the top of TEC 9, the cooling rate of TEC 9 control minute surface 10 under CPU control.
More than describing not is to be to restriction of the present utility model, can not assert that implementation of the present utility model can only be confined to above description content.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, the variation of proposition, remodeling, interpolation or replacement all belong to the utility model protection domain.
Claims (2)
1. the refrigeration system of a chilled-mirror type dew point tester, for the gage outfit minute surface being freezed and heating, it is characterized in that, comprise: stainless steel liquid nitrogen bottle (1) and interior electrically heated rod (2) thereof, liquid nitrogen conduit (3) connects the nitrogen inlet (4) of stainless steel liquid nitrogen bottle (1) and refrigeration body, spray from liquid nitrogen conduit (3) behind the liquid nitrogen gasification of heating, enter the refrigeration body by nitrogen inlet (4), flow out from liquid nitrogen outlet (8) again after most of cold is passed to the refrigeration body; TEC (9) is close to refrigeration body top, so that the break-even TEC (9) that is delivered to of cold of refrigeration body; Minute surface (10) is installed on the top of TEC (9), and TEC (9) is controlled the cooling rate of minute surface (10) under CPU control.
2. the refrigeration system of chilled-mirror type dew point tester according to claim 1, it is characterized in that, described refrigeration body comprises three-decker, internal layer refrigeration body (5), outer refrigeration body (6) and heat-insulation layer (7), from liquid nitrogen conduit (3) ejection, at first enter the internal layer refrigeration body (5) of instrument internal three-decker by the nitrogen inlet (4) of refrigeration body behind the liquid nitrogen gasification of heating; The gasification liquid nitrogen passes to internal layer refrigeration body (5) with most of cold, then enters outer refrigeration body (6); Final gasification liquid nitrogen flows out from liquid nitrogen outlet (8) after more most of cold being passed to the refrigeration body; Described outer refrigeration body (6) is sealed by heat-insulation layer (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220352376 CN202709542U (en) | 2012-07-19 | 2012-07-19 | Refrigerating system of cold-mirror type dew point tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220352376 CN202709542U (en) | 2012-07-19 | 2012-07-19 | Refrigerating system of cold-mirror type dew point tester |
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| Publication Number | Publication Date |
|---|---|
| CN202709542U true CN202709542U (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220352376 Expired - Fee Related CN202709542U (en) | 2012-07-19 | 2012-07-19 | Refrigerating system of cold-mirror type dew point tester |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103816951A (en) * | 2014-02-18 | 2014-05-28 | 河南科技大学 | Liquid nitrogen cooling device |
| CN105424751A (en) * | 2015-12-23 | 2016-03-23 | 天津市泓诚泰科技发展有限公司 | Super-low-humidity chilled mirror dew point meter, refrigeration device and refrigeration method therefor |
| CN105987930A (en) * | 2016-07-06 | 2016-10-05 | 中国人民解放军空军勤务学院 | Self-cooling type dew-point instrument |
| CN110174432A (en) * | 2019-06-26 | 2019-08-27 | 重庆理工大学 | The thermophoresis experimental provision of Electronic Packaging microbonding point |
-
2012
- 2012-07-19 CN CN 201220352376 patent/CN202709542U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103816951A (en) * | 2014-02-18 | 2014-05-28 | 河南科技大学 | Liquid nitrogen cooling device |
| CN105424751A (en) * | 2015-12-23 | 2016-03-23 | 天津市泓诚泰科技发展有限公司 | Super-low-humidity chilled mirror dew point meter, refrigeration device and refrigeration method therefor |
| CN105987930A (en) * | 2016-07-06 | 2016-10-05 | 中国人民解放军空军勤务学院 | Self-cooling type dew-point instrument |
| CN110174432A (en) * | 2019-06-26 | 2019-08-27 | 重庆理工大学 | The thermophoresis experimental provision of Electronic Packaging microbonding point |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20150719 |
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| EXPY | Termination of patent right or utility model |