CN203422335U - Standard aspirated psychrometer - Google Patents
Standard aspirated psychrometer Download PDFInfo
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- CN203422335U CN203422335U CN201320537909.1U CN201320537909U CN203422335U CN 203422335 U CN203422335 U CN 203422335U CN 201320537909 U CN201320537909 U CN 201320537909U CN 203422335 U CN203422335 U CN 203422335U
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- wet bulb
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Abstract
The utility model discloses a standard aspirated psychrometer. A dry bulb thermometer and a wet bulb thermometer are mounted on a ventilation structure body through a dry bulb heat insulation mounting jacket and a wet bulb heat insulation mounting jacket respectively; a dry bulb anti-radiation jacket and a wet bulb anti-radiation jacket respectively cover the dry bulb thermometer and the wet bulb thermometer; the dry bulb anti-radiation jacket and the wet bulb anti-radiation jacket are connected together with the ventilation structure body through a dry bulb heat insulation connection pipe and a wet bulb heat insulation connection pipe respectively; a water supply cooling device comprises a stainless steel sleeve, a first water feed jacket, a second water feed jacket, a third water feed jacket, a heat insulation body and a water storage container; the first water feed jacket is arranged on the outer wall of the stainless steel sleeve; the second water feed jacket clings to the inner wall of the stainless steel sleeve through the heat insulation body; the third water feed sleeve is arranged on the outer wall of the wet bulb anti-radiation jacket; water guiding lines led out through the water feed jackets are immersed into the water storage container; an extension section led out through the second water feed jacket is connected together with a wet bulb water feed jacket arranged on the wet bulb thermometer, so that the wet bulb water feed jacket feeds water through the second water feed jacket. The standard aspirated psychrometer disclosed by the utility model reaches a level that the measurement error is less than +/-1% RH (relative humidity).
Description
Technical field
The utility model relates to a kind of standard aspirated psychrometer, relates in particular to a kind of standard aspirated psychrometer that adopts measurement with wet.
Background technology
Measurement with wet is measured humidity and in humidity measuring method, is occupied critical role, and the standard aspirated psychrometer of measurement with wet is for a long time as other hygroscopic standard of calibrating.Current standard aspirated psychrometer is divided into First class standard and second-class standard.First class standard physical dimension is larger, belongs to main equipment, mainly under laboratory condition, uses, and for the measurement of humidity transmission of quantity value, is not suitable for use in the moisture measurement in general work.Compare with First class standard aspirated psychrometer, the physical dimension of second-class standard aspirated psychrometer is smaller, both can, for the measurement of humidity transmission of quantity value, also can be used for moisture measurement general in work.The general only outfit use in national laboratory of aspirated psychrometer of First class standard is second-class standard at the standard aspirated psychrometer that can buy on the market and use in routine duties at present.Current standard aspirated psychrometer designs mainly for the moisture measurement of atmospheric environment, be not suitable for using in the moisture measurement of environmental test equipment, this is mainly because the problem and shortage of depositing in the following areas causes: 1) physical dimension is larger, cannot be placed on work space compared with in the testing equipment of circlet border; 2) temperature range when temperature range during moisture measurement can not the moisture measurement of overlay environment testing equipment; 3) aspirated psychrometer of second-class standard can not meet the requirement to the franchise of moisture measurement.
During the moisture measurement of environmental test equipment, temperature range is generally at 0 ℃～65 ℃, and it is very large that work space has, and what have is very little, the minimum work space that approximately only has 200mm * 200mm * 200mm, be generally ± 3%RH of the franchise of humidity.
The standard aspirated psychrometer that uses glass-stem thermometer measurement dry-bulb temperature and wet-bulb temperature and design, physical dimension is about 400mm * 90mm * 90mm, and temperature measurement range during moisture measurement is about 0 ℃～40 ℃, humidity franchise ± 2%RH.Obviously in the moisture measurement of environmental test equipment work space, cannot be placed on work space compared with in the testing equipment of circlet border, temperature range during moisture measurement also fails to cover, be placed in the environmental test equipment of larger work space, also can, because of the airtight reason of environmental test equipment work space, cause reading difficulty.
The standard aspirated psychrometer that uses platinum-resistance thermometer measurement dry-bulb temperature and wet-bulb temperature and design, physical dimension is about 250mm * 90mm * 90mm, and temperature measurement range during moisture measurement is about 0 ℃～40 ℃, humidity franchise ± 2%RH.Except not causing the difficulty on reading, there is the identical technical matters of standard aspirated psychrometer designing with using glass-stem thermometer measurement dry-bulb temperature and wet-bulb temperature in this aspirated psychrometer.
Moisture measurement accuracy about standard aspirated psychrometer, except some problems that theory and practice all exists, also there is some other problem, for example the water temperature problem not identical with wet-bulb temperature of wet and dry bulb temperature accuracy of measurement problem, radiation problem, supply wet bulb upper water sleeve.This is embodied in: current standard aspirated psychrometer, wet bulb radiation protection sleeve adopts double-decker polishing surfaces externally and internally, though this method can effectively reduce the impact of external radiation on the direct radiation of wet bulb thermometer, but the temperature of radiation-proof protecting cover is all the time higher than wet-bulb temperature, wet bulb thermometer is produced to radiant heat transfer, cause wet-bulb temperature to measure inaccurate; Current standard aspirated psychrometer, basic identical with the temperature of tested air for the water temperature that wet bulb upper water sleeve supplies water, higher than wet-bulb temperature, this measurement to wet-bulb temperature has brought error.
Utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, the standard aspirated psychrometer that provides the performance aspect a kind of at least accuracy of measurement when moisture measurement to be significantly improved.
The technical solution adopted in the utility model is: a kind of standard aspirated psychrometer, comprise aeration structure body, be installed on the dry bulb thermometer on a crosswind road of aeration structure body lower end and be installed on the wet bulb thermometer on the opposite side air channel of aeration structure body lower end, described dry bulb thermometer and wet bulb thermometer are installed on aeration structure body by dry bulb and the adiabatic installation sleeve of wet bulb respectively, described dry bulb thermometer and wet bulb thermometer are covered with respectively dry bulb and wet bulb radiation protection sleeve outward, described dry bulb and wet bulb radiation protection sleeve link together by the adiabatic connecting pipe of dry bulb and wet bulb and aeration structure body respectively,
Described standard aspirated psychrometer also comprises water supply heat sink, described water supply heat sink comprises stainless steel sleeve pipe, first, the second and the 3rd upper water sleeve, heat guard, and tank, described the first upper water sleeve is arranged on the outer wall of stainless steel sleeve pipe, described the second upper water sleeve is installed by the adaptation between heat guard and stainless steel sleeve pipe and is close to the inwall of stainless steel sleeve pipe, described the 3rd upper water sleeve is arranged on the outer wall of described wet bulb radiation protection sleeve, through described first, the diversion line that the second and the 3rd upper water sleeve is drawn immerses in tank, the extension of drawing through described the second upper water sleeve is connected as a single entity with the wet bulb upper water sleeve being arranged on wet bulb thermometer, make wet bulb upper water sleeve water on the second upper water sleeve, described water supply heat sink is fixedly installed on described aeration structure body.
Preferably, described dry bulb and wet bulb thermometer are compensation by thermistor.
Preferably, the overall dimensions of described standard aspirated psychrometer is in 100mm * 30mm * 30mm.
The airborne part that is exposed to of the diversion line of preferably, drawing through described first, second, and third upper water sleeve all covers in sleeve pipe.
The part between stainless steel sleeve pipe and wet bulb thermometer of the extension that preferably, described the second upper water sleeve is drawn is covered with insulation casing outward.
Preferably, described heat guard is elastic body, and described heat guard is pressed in the inner chamber of stainless steel sleeve pipe by there is elastic deformation.
Preferably, the adiabatic installation sleeve of described dry bulb and wet bulb is threaded connection structure and is installed on aeration structure body, and described dry bulb and wet bulb thermometer are arranged in respectively in dry bulb and the adiabatic installation sleeve of wet bulb.
Preferably, one end of the adiabatic connecting pipe of described dry bulb and wet bulb is threaded connection structure and is installed on aeration structure body, and described dry bulb and wet bulb radiation protection sleeve are threaded connection structural correspondence and are installed on the other end of dry bulb and the adiabatic connecting pipe of wet bulb.
Preferably, described aeration structure body has the neck cervical part of esophagus inside contracting the top of blower fan being installed and forming between the lower end in air channel, both sides.
Preferably, the blower fan of standard aspirated psychrometer adopts silicon dioxide to carry out plated film.
The beneficial effects of the utility model are: by water supply heat sink being set on the basis at existing standard aspirated psychrometer and carrying out various insulation, make the moisture measurement accuracy of standard aspirated psychrometer of the present utility model obtain significantly improving, reached the level of be less than ± 1%RH, than existing standard aspirated psychrometer, improved approximately 1 times, reached the level of the large-scale standard aspirated psychrometer that can only use under laboratory condition.In addition, wet-and-dry bulb thermometer is replaced with to compensation by thermistor by existing glass or platinum-resistance thermometer, coordinating selects small-sized fan can make whole aspirated psychrometer physical dimension significantly reduce, can be made into miniature standard aspirated psychrometer, be suitable for carrying out the moisture measurement of environmental test equipment.Have again, by selecting the blower fan through plated film design, the temperature range in the time of can widening moisture measurement.
Accompanying drawing explanation
Fig. 1 shows the cross-sectional schematic according to standard aspirated psychrometer described in the utility model;
Fig. 2 shows according to a kind of cut-open view of implementing structure of the removal water supply heat sink part of standard aspirated psychrometer described in the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.
As illustrated in fig. 1 and 2, standard aspirated psychrometer of the present utility model comprises aeration structure body 1, be installed on the dry bulb thermometer 3 on a crosswind road 13a of aeration structure body lower end 13 and be installed on the wet bulb thermometer 2 on the opposite side air channel 13b of aeration structure body lower end 13, at this, dry bulb thermometer 3 and wet bulb thermometer 2 are installed on the lower end 13 of aeration structure body 1 by the adiabatic installation sleeve 4a of dry bulb and the adiabatic installation sleeve 4b of wet bulb respectively, in case stop-pass wind structure 1 conducts its heat to dry bulb thermometer 3 and wet bulb thermometer 2; Outer dry bulb radiation protection sleeve 9a and the wet bulb radiation protection sleeve 9b of being covered with respectively of dry bulb thermometer 3 and wet bulb thermometer 2, dry bulb and wet bulb radiation protection sleeve 9a, 9b link together by the lower end 13 of the adiabatic connecting pipe 5a of dry bulb and the adiabatic connecting pipe 5b of wet bulb and aeration structure body 1 respectively, can prevent that like this aeration structure body 1 from conducting heat to dry bulb and wet bulb radiation protection sleeve 9a, 9b.
Standard aspirated psychrometer of the present utility model also comprises water supply heat sink, it comprises stainless steel sleeve pipe 61, the first to the 3rd upper water sleeve, heat guard 62 and tank 69, the first upper water sleeve 63 is wound around or is sheathed on (at this, can on outer wall, form upper water sleeve by directly wet bulb gauze being wound in, also can adopt the upper water sleeve finished product with specific modality having wound) on the outer wall of stainless steel sleeve pipe 61, the second upper water sleeve 67 is by being installed in the inner chamber of this stainless steel sleeve pipe 61 heat guard adaptation and being close to the inwall of stainless steel sleeve pipe 61, the 3rd upper water sleeve 64 is wound around or is sheathed on the outer wall of above wet bulb radiation protection sleeve 9b, through first, the second and the 3rd upper water sleeve 63, 67, the diversion line 63a that 64 correspondences are drawn, 67a, 64a all immerses in tank 69, the extension of drawing through the second upper water sleeve 67 is connected as a single entity with the wet bulb upper water sleeve 7 being arranged on wet bulb thermometer 2, make wet bulb upper water sleeve 7 water on the second upper water sleeve 67, the heat sink that more than supplies water for example can be fixedly installed on aeration structure body 1 by connecting screw rod 6a, this connecting screw rod 6a can be for wearing stainless steel sleeve pipe, the same connecting screw rod of heat guard and tank, also can be connection segment stainless steel sleeve pipe with aeration structure body and be connected heat guard and two connecting screw rods of tank 69.At this, for the first upper water sleeve 63, based on evaporation of water effect in the first upper water sleeve 63, can make the temperature of stainless steel sleeve pipe 61 drop to and approach wet-bulb temperature; Wet bulb upper water sleeve 7 be connected as a single entity with the second upper water sleeve 67 (the two can be entwined by same wet bulb gauze) make the temperature of wet bulb upper water sleeve 7 identical with the temperature of stainless steel sleeve pipe 61, basic identical with wet-bulb temperature, outside the part between stainless steel sleeve pipe 61 and wet bulb radiation protection sleeve 9b of extension, can cover and establish an insulation casing 65, with to extension insulation, can further guarantee the consistance of the temperature of wet bulb upper water sleeve 7 and the temperature of stainless steel sleeve pipe 61; And the 3rd upper water sleeve 64 on wet bulb radiation protection sleeve 9b, based on evaporation of water effect in the 3rd upper water sleeve 64 equally, the temperature of wet bulb radiation protection sleeve 9b will drop to wet-bulb temperature basically identical, so just can effectively reduce and between wet bulb radiation protection sleeve 9b and wet bulb thermometer, carry out radiant heat exchange.Like this, in wet bulb upper water sleeve 7, the temperature of water and wet-bulb temperature are basic identical, the evaporation process that makes moisture in wet bulb upper water sleeve is ideal process, the isobaric process from common standard aspirated psychrometer becomes adiabatic process, approach real thermodynamic wet-bult temperature, can effectively reduce measuring error like this.
For the ease of the setting of the second upper water sleeve 67, this heat guard can adopt external diameter to be slightly larger than the elastic body of stainless steel sleeve pipe 61, like this by elastic body being pressed in the inner chamber of stainless steel sleeve pipe 61, just can guarantee that the inwall of the second upper water sleeve 67 and stainless steel sleeve pipe 61 is close to.
The diversion line 63a that first, second, and third above upper water sleeve 63,67,64 correspondences are drawn, 67a, 64a are exposed to airborne part (i.e. not water-immersed part) and can cover by sleeve pipe, to prevent that entering wet-bulb temperature after the moisture evaporation of diversion line measures in passage.In the present embodiment, because the position of the first and second upper water sleeves is approaching, diversion line 63a, 67a can be covered in same sleeve pipe 68, diversion line 64a covers in another sleeve pipe 66.
For the ease of standard aspirated psychrometer of the present utility model being designed to be specially adapted to carry out the miniature psychrometer of the moisture measurement of environmental test equipment, above dry bulb and wet bulb thermometer can be the compensation by thermistor that size is less (its size can be only φ 3mm * 13mm), in addition, due to the error of compensation by thermistor can be controlled in ± 0.01 ℃, the platinum-resistance thermometer that phase ratio error is ± 0.06 ℃ can further reduce measuring error.On this basis, coordinating example in this way size only has the mini fan of φ 25mm * 10mm, and the overall dimensions of standard aspirated psychrometer can be controlled in 100mm * 30mm * 30mm.Like this, compare with the standard aspirated psychrometer that uses glass-stem thermometer to measure dry-bulb temperature and wet-bulb temperature, the physical dimension of standard aspirated psychrometer of the present utility model approximately only have its 1/4, compare with the standard aspirated psychrometer that uses platinum-resistance thermometer to measure dry-bulb temperature and wet-bulb temperature, the physical dimension of standard aspirated psychrometer of the present utility model approximately only have its 1/2.
As shown in Figure 2, the adiabatic installation sleeve 4a of dry bulb and wet bulb, 4b for example can be threaded connection on the lower end 13 that structure is installed on aeration structure body 1, and dry bulb and wet bulb thermometer 3,2 are arranged in respectively in dry bulb and the adiabatic installation sleeve 4a of wet bulb, 4b.In like manner, one end of the adiabatic connecting pipe 5a of dry bulb and wet bulb, 5b can be threaded connection on the lower end 13 that structure is installed on aeration structure body 1, and dry bulb and wet bulb radiation protection sleeve 9a, 9b also can be threaded connection structural correspondence and be installed on the other end of dry bulb and the adiabatic connecting pipe 5a of wet bulb, 5b.
As illustrated in fig. 1 and 2, aeration structure body 1 has the neck cervical part of esophagus 12 inside contracting the top 11 of blower fan 24 being installed and forming between the lower end 13 in air channel, both sides, during measurement, the air suction mode of blower fan 24, tested gas flows to top discharge through dry bulb and the wet bulb thermometer 3,2 of the lower end 13 of aeration structure body 1, middle neck cervical part of esophagus 12 can make gas flow rate increase, and increases the homogeneity of gas flow rate.Above aeration structure body 1 can be one-body molded, also can adopt the structure of top 11, neck cervical part of esophagus 12 and lower end 13 split designs, and three parts can be threaded connection structure and fit together.
In addition, the temperature that the temperature range that can bear during due to moisture measurement mainly be can bear by blower fan 24 determines, therefore, as the circuit of blower fan 24 carried out to coating film treatment, not only can make blower fan there is water-proof function, also can make 70 ℃ of above high temperature of blower fan tolerance, temperature range while meeting environmental test equipment moisture measurement, this Coating Materials both can be used can waterproof, again can resistant to elevated temperatures silicon dioxide.
Be only the utility model preferred embodiment in sum, be not used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modify, all should belong to technology category of the present utility model.
Claims (10)
1. a standard aspirated psychrometer, comprise aeration structure body, be installed on the dry bulb thermometer on a crosswind road of aeration structure body lower end and be installed on the wet bulb thermometer on the opposite side air channel of aeration structure body lower end, it is characterized in that: described dry bulb thermometer and wet bulb thermometer are installed on aeration structure body by dry bulb and the adiabatic installation sleeve of wet bulb respectively, described dry bulb thermometer and wet bulb thermometer are covered with respectively dry bulb and wet bulb radiation protection sleeve outward, described dry bulb and wet bulb radiation protection sleeve link together by the adiabatic connecting pipe of dry bulb and wet bulb and aeration structure body respectively,
Described standard aspirated psychrometer also comprises water supply heat sink, described water supply heat sink comprises stainless steel sleeve pipe, first, the second and the 3rd upper water sleeve, heat guard, and tank, described the first upper water sleeve is arranged on the outer wall of stainless steel sleeve pipe, described the second upper water sleeve is installed by the adaptation between heat guard and stainless steel sleeve pipe and is close to the inwall of stainless steel sleeve pipe, described the 3rd upper water sleeve is arranged on the outer wall of described wet bulb radiation protection sleeve, through described first, the diversion line that the second and the 3rd upper water sleeve is drawn immerses in tank, the extension of drawing through described the second upper water sleeve is connected as a single entity with the wet bulb upper water sleeve being arranged on wet bulb thermometer, make wet bulb upper water sleeve water on the second upper water sleeve, described water supply heat sink is fixedly installed on described aeration structure body.
2. standard aspirated psychrometer according to claim 1, is characterized in that: described dry bulb and wet bulb thermometer are compensation by thermistor.
3. standard aspirated psychrometer according to claim 2, is characterized in that: the overall dimensions of described standard aspirated psychrometer is in 100mm * 30mm * 30mm.
4. standard aspirated psychrometer according to claim 1 and 2, is characterized in that: the airborne part that is exposed to of the diversion line of drawing through described first, second, and third upper water sleeve all covers in sleeve pipe.
5. standard aspirated psychrometer according to claim 1 and 2, is characterized in that: the part between stainless steel sleeve pipe and wet bulb thermometer of the extension that described the second upper water sleeve is drawn is covered with insulation casing outward.
6. standard aspirated psychrometer according to claim 1, is characterized in that: described heat guard is elastic body, and described heat guard is pressed in the inner chamber of stainless steel sleeve pipe by there is elastic deformation.
7. standard aspirated psychrometer according to claim 1, it is characterized in that: the adiabatic installation sleeve of described dry bulb and wet bulb is threaded connection structure and is installed on aeration structure body, described dry bulb and wet bulb thermometer are arranged in respectively in dry bulb and the adiabatic installation sleeve of wet bulb.
8. according to the standard aspirated psychrometer described in claim 1 or 7, it is characterized in that: one end of the adiabatic connecting pipe of described dry bulb and wet bulb is threaded connection structure and is installed on aeration structure body, described dry bulb and wet bulb radiation protection sleeve are threaded connection structural correspondence and are installed on the other end of dry bulb and the adiabatic connecting pipe of wet bulb.
9. standard aspirated psychrometer according to claim 1, is characterized in that: described aeration structure body has the neck cervical part of esophagus inside contracting the top of blower fan being installed and forming between the lower end in air channel, both sides.
10. according to the standard aspirated psychrometer described in claim 1 or 9, it is characterized in that: the blower fan of standard aspirated psychrometer adopts silicon dioxide to carry out plated film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320537909.1U CN203422335U (en) | 2013-08-30 | 2013-08-30 | Standard aspirated psychrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320537909.1U CN203422335U (en) | 2013-08-30 | 2013-08-30 | Standard aspirated psychrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203422335U true CN203422335U (en) | 2014-02-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320537909.1U Withdrawn - After Issue CN203422335U (en) | 2013-08-30 | 2013-08-30 | Standard aspirated psychrometer |
Country Status (1)
| Country | Link |
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| CN (1) | CN203422335U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439361A (en) * | 2013-08-30 | 2013-12-11 | 广州赛宝计量检测中心服务有限公司 | Standard ventilation psychrometer |
-
2013
- 2013-08-30 CN CN201320537909.1U patent/CN203422335U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439361A (en) * | 2013-08-30 | 2013-12-11 | 广州赛宝计量检测中心服务有限公司 | Standard ventilation psychrometer |
| CN103439361B (en) * | 2013-08-30 | 2015-10-07 | 广州赛宝计量检测中心服务有限公司 | A kind of standard aspirated psychrometer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140205 Effective date of abandoning: 20150513 |
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| RGAV | Abandon patent right to avoid regrant |