CN105987930A - Self-cooling type dew-point instrument - Google Patents
Self-cooling type dew-point instrument Download PDFInfo
- Publication number
- CN105987930A CN105987930A CN201610530448.3A CN201610530448A CN105987930A CN 105987930 A CN105987930 A CN 105987930A CN 201610530448 A CN201610530448 A CN 201610530448A CN 105987930 A CN105987930 A CN 105987930A
- Authority
- CN
- China
- Prior art keywords
- temperature
- self
- dew point
- lower cover
- dew
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
- G01N25/66—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point
- G01N25/68—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point by varying the temperature of a condensing surface
Abstract
The invention provides a self-cooling type dew-point instrument. An upper cover tightly sleeves the upper end of a vacuum insulation pipe; an air inlet joint and an air vent are arranged in the upper cover; the air inlet joint is connected with a voltage stabilizer; a lower cover tightly sleeves the lower end of the vacuum insulation pipe; a signal wire is embedded in the lower cover; a central pipe is mounted on the middle position in the vacuum insulation pipe; a capillary tube is wound on the central pipe from top to bottom; the upper end of the capillary tube is connected with the air inlet joint; a light sensing mirror surface is rightly opposite to the tail end of the capillary tube; a temperature sensing element is embedded in the center of the light sensing mirror surface; a light emitting element and a light receiving element are symmetrically distributed on the two sides of the light sensing mirror surface; the temperature sensing element, the light emitting element and the light receiving element are respectively wired and submerged into the lower cover and are connected with an electric controlled temperature and dew-point display arranged under the lower cover through wires. Compared with the prior art, the self-cooling type dew-point instrument has the advantages that the temperature is quickly reduced, the temperature value of the dew point is quickly acquired, the measurement is accurate, the volume is small, the energy consumption is less, the requirement of energy conservation and emission reduction of China is met and the self-cooling type dew-point instrument is suitable for use under the airport or field condition.
Description
Technical field
The present invention relates to a kind of dew point hygrometer, specifically a kind of self-cooled dew point hygrometer, belong to gas dew point field of measuring technique.
Background technology
Aircraft (especially opportunity of combat) flight needs to use high pressure oxygen and nitrogen.Oxygen is mainly used in pilot and breathes and aircraft
Oxygenating during engine flame-out in flight starts.Oxygen purity requires to be higher than 99.5%, and dew-point temperature is less than-65 DEG C.Nitrogen is flying
Effect on machine is mainly used as power and uses gas, undercarriage cushioning and accumulator supercharging gas etc., but its purity is higher than 99.9%,
Dew-point temperature is less than-65 DEG C.
Owing to aircraft is mainly filled by oxygen and nitrogen in outfield, if the dew-point temperature of gas can be carried out before Guan Chong
Accurately measurement, is possible not only to promote flight support quality, it is also possible to promote the safe coefficient of flight.At present, the dew on market
Point instrument is mostly to use semiconductor refrigerating mode, needs to consume a large amount of electric energy, is therefore not suitable for line, is also unfavorable for open country
Use under the conditions of war.
Content of the invention
The problem existing for above-mentioned prior art, the present invention provides a kind of self-cooled dew point hygrometer, volume and power consumption little, convenient
The features such as use under field condition.
To achieve these goals, the present invention includes vacuum heat-insulating pipe, and described vacuum heat-insulating pipe upper end is tightly cased with upper cover, on
Being provided with inlet suction port and steam vent in lid, wherein, inlet suction port is for being connected with voltage-stablizer；Described vacuum heat-insulating pipe
Lower end is tightly cased with lower cover, and described lower cover is embedded with holding wire；Described vacuum heat-insulating pipe bosom position is provided with center
Pipe, central tube is wound with capillary from top to bottom, and described capillary upper end is connected with inlet suction port, and capillary end is just right
Having a photosensitive minute surface, described photosensitive minute surface center is embedded with temperature-sensing element, and the bilateral symmetry of photosensitive minute surface is distributed luminous unit
Part and photo detector, described temperature-sensing element, light-emitting component and photo detector wiring respectively are slipped into lower cover, and and are arranged on down
Automatically controlled and temperature below lid, dew point display electric wire connect.
Further, inside inlet suction port, filter is installed.
Further, upper cover is provided with inlet suction port and several uniform steam vents.
Further, central tube lower end is provided with silently.
Further, automatically controlled and temperature, dew point display use touching display screen.
Operation principle: during measurement gas dew point, gases at high pressure exit into voltage-stablizer from gas cylinder valve, are reduced to certain pressure
Gas subsequently by inlet suction port enter capillary, due to reducing pressure by regulating flow, the temperature of gas can reduce, and temperature reduce
Gas reverse flow can cool down the positive gas body in capillary again, so repeatedly, can make the gas temperature at capillary outlet
It is gradually lowered.Due to capillary end just to photosensitive minute surface, when mirror temperature is higher than the dew-point temperature of gas, then in gas
Steam cannot condense, and the minute surface being dried is almost fully reflective to photo detector by the incident light of light-emitting component.Treat that mirror temperature reaches
During to the dew-point temperature of gas, there is condensation and dewfall (white) in minute surface, incident light on minute surface in diffusing reflection, photo detector defeated
Entering excitation to reduce, this temperature is demonstrated temperature value by temperature element by change-over circuit, and this temperature value is exactly dew-point temperature.
In conjunction with operation principle, contrasting prior art, the present invention lowers the temperature rapidly, can quickly obtain dew point temperature value, measurement standard
Really, and volume little and power consumption little, meet national energy-saving reduce discharging requirement, be suitable under airport or field condition use.
Brief description
Fig. 1 is present configuration schematic diagram；
Fig. 2 is the use schematic diagram of connector.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
As it is shown in figure 1, a kind of self-cooled dew point hygrometer, including vacuum heat-insulating pipe 3, described vacuum heat-insulating pipe 3 upper end is tightly cased with
Upper cover 1, is provided with inlet suction port and steam vent in upper cover 1, wherein, and true for described in being connected with voltage-stablizer of inlet suction port
Empty heat-insulated pipe 3 lower end is tightly cased with lower cover 6, and described lower cover 6 is embedded with holding wire；Described vacuum heat-insulating pipe 3 bosom
Position is provided with central tube 4, and central tube 4 is wound with capillary 2, described capillary 2 upper end and inlet suction port from top to bottom
Being connected, capillary 2 end is just to there being a photosensitive minute surface 9, and described photosensitive minute surface 9 center is embedded with temperature-sensing element 7, photosensitive
The bilateral symmetry of minute surface 9 is distributed light-emitting component 10 and photo detector 5, described temperature-sensing element the 7th, light-emitting component 10 and being subject to
Lower cover 6 is slipped in optical element 5 wiring respectively, and and is arranged on the automatically controlled and temperature below lower cover 6, dew point display 8 electric wire even
Connect.
Further improve as the present invention, filter is installed inside inlet suction port, prevent the particle being mingled with in gas from blocking up
Plug capillary.
Further improve as the present invention, upper cover 1 is provided with inlet suction port and several uniform steam vents, it is ensured that row
Gas effect.
Further improving as the present invention, central tube 4 lower end is provided with silently 11, and the cooling method of employing is throttling cooling,
And constantly cooling down positive gas body by reflux gas so that the gas temperature of capillary end constantly reduces.
Further improving as the present invention, automatically controlled and temperature, dew point display 8 use touching display screen, easy to use.
During measurement gas dew point, gases at high pressure exit into voltage-stablizer from gas cylinder valve, are reduced to the gas of certain pressure subsequently
Entering capillary by inlet suction port, due to reducing pressure by regulating flow, the temperature of gas can reduce, and the gas that temperature reduces can be anti-
Positive gas body in flowing cooling capillary, so repeatedly, can make the gas temperature at capillary outlet be gradually lowered.
Due to capillary end just to photosensitive minute surface, when mirror temperature is higher than the dew-point temperature of gas, then the steam in gas cannot coagulate
Knot, the minute surface being dried is almost fully reflective to photo detector by the incident light of light-emitting component.Treat that mirror temperature reaches the dew of gas
During point temperature, there is condensation and dewfall (white) in minute surface, and incident light is in diffusing reflection on minute surface, and the input stimulus of photo detector reduces,
This temperature is demonstrated temperature value by temperature element by change-over circuit, and this temperature value is exactly dew-point temperature.
In conjunction with operation principle, contrasting prior art, the present invention lowers the temperature rapidly, can quickly obtain dew point temperature value, measurement standard
Really, and volume little and power consumption little, meet national energy-saving reduce discharging requirement, be suitable under airport or field condition use.
Claims (5)
1. a self-cooled dew point hygrometer, including vacuum heat-insulating pipe (3), it is characterised in that:
Described vacuum heat-insulating pipe (3) upper end is tightly cased with upper cover (1), and upper cover is provided with inlet suction port and steam vent in (1),
Wherein, inlet suction port is for being connected with voltage-stablizer；
Described vacuum heat-insulating pipe (3) lower end is tightly cased with lower cover (6), and described lower cover (6) is embedded with holding wire；
Described vacuum heat-insulating pipe (3) bosom position is provided with central tube (4), on central tube (4) from top to bottom around
Having capillary (2), described capillary (2) upper end is connected with inlet suction port, and capillary (2) end is just to there being a sense
Light minute surface (9), described photosensitive minute surface (9) center is embedded with temperature-sensing element (7), and the bilateral symmetry of photosensitive minute surface (9) is divided
It is furnished with light-emitting component (10) and photo detector (5), described temperature-sensing element (7), light-emitting component (10) and photo detector
(5) lower cover (6) is slipped in wiring respectively, and and is arranged on automatically controlled and temperature, the dew point display (8) of lower cover (6) lower section
Electric wire connects.
2. a kind of self-cooled dew point hygrometer according to claim 1, it is characterised in that: described inlet suction port is internal to be installed
There is filter.
3. a kind of self-cooled dew point hygrometer according to claim 1, it is characterised in that: described upper cover (1) is arranged
Have inlet suction port and several uniform steam vents.
4. a kind of self-cooled dew point hygrometer according to claim 1, it is characterised in that: described central tube (4) lower end
Silently (11) are installed.
5. a kind of self-cooled dew point hygrometer according to claim 1, it is characterised in that: described automatically controlled and temperature, dew point
Display (8) uses touching display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610530448.3A CN105987930A (en) | 2016-07-06 | 2016-07-06 | Self-cooling type dew-point instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610530448.3A CN105987930A (en) | 2016-07-06 | 2016-07-06 | Self-cooling type dew-point instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105987930A true CN105987930A (en) | 2016-10-05 |
Family
ID=57044302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610530448.3A Pending CN105987930A (en) | 2016-07-06 | 2016-07-06 | Self-cooling type dew-point instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105987930A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006018651A2 (en) * | 2004-08-19 | 2006-02-23 | Michell Instruments Limited | Apparatus and method for measuring a condensable component of a gas sample |
| CN201000442Y (en) * | 2007-01-16 | 2008-01-02 | 丁五行 | Intelligentized rapid survey cold mirror dew point hygrometer |
| JP4504318B2 (en) * | 2006-01-20 | 2010-07-14 | 株式会社山武 | Mirror surface dew point meter |
| CN201852735U (en) * | 2010-10-29 | 2011-06-01 | 成都市倍诚分析技术有限公司 | Temperature-indicating type modular water cooler |
| CN201852346U (en) * | 2010-10-29 | 2011-06-01 | 成都市倍诚分析技术有限公司 | Modular temperature display controller capable of realizing vortex refrigeration and heat exchange |
| CN202049124U (en) * | 2011-02-12 | 2011-11-23 | 北京兴泰学成仪器有限公司 | Dew point measuring instrument for low-humidity gas |
| CN202281759U (en) * | 2011-09-20 | 2012-06-20 | 成都兰华电子工程有限公司 | High-voltage mirror surface dew point detector |
| CN202709542U (en) * | 2012-07-19 | 2013-01-30 | 上海电控研究所 | Refrigerating system of cold-mirror type dew point tester |
-
2016
- 2016-07-06 CN CN201610530448.3A patent/CN105987930A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006018651A2 (en) * | 2004-08-19 | 2006-02-23 | Michell Instruments Limited | Apparatus and method for measuring a condensable component of a gas sample |
| JP4504318B2 (en) * | 2006-01-20 | 2010-07-14 | 株式会社山武 | Mirror surface dew point meter |
| CN201000442Y (en) * | 2007-01-16 | 2008-01-02 | 丁五行 | Intelligentized rapid survey cold mirror dew point hygrometer |
| CN201852735U (en) * | 2010-10-29 | 2011-06-01 | 成都市倍诚分析技术有限公司 | Temperature-indicating type modular water cooler |
| CN201852346U (en) * | 2010-10-29 | 2011-06-01 | 成都市倍诚分析技术有限公司 | Modular temperature display controller capable of realizing vortex refrigeration and heat exchange |
| CN202049124U (en) * | 2011-02-12 | 2011-11-23 | 北京兴泰学成仪器有限公司 | Dew point measuring instrument for low-humidity gas |
| CN202281759U (en) * | 2011-09-20 | 2012-06-20 | 成都兰华电子工程有限公司 | High-voltage mirror surface dew point detector |
| CN202709542U (en) * | 2012-07-19 | 2013-01-30 | 上海电控研究所 | Refrigerating system of cold-mirror type dew point tester |
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Application publication date: 20161005 |