CN102590277A - Ventilation type wet and dry bulb temperature measuring device - Google Patents
Ventilation type wet and dry bulb temperature measuring device Download PDFInfo
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- CN102590277A CN102590277A CN2012100198352A CN201210019835A CN102590277A CN 102590277 A CN102590277 A CN 102590277A CN 2012100198352 A CN2012100198352 A CN 2012100198352A CN 201210019835 A CN201210019835 A CN 201210019835A CN 102590277 A CN102590277 A CN 102590277A
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Abstract
The invention relates to a ventilation type wet and dry bulb temperature measuring device, which comprises a standard air duct, wherein the front end of the standard air duct is provided with a standard flow pipe; a rectification gate is arranged in the standard air duct and at the joint of the standard flow pipe and the standard air flue; a dry bulb thermometer and a wet bulb thermometer are respectively fixed on the outer side of the standard air flue; a temperature bulb of the wet bulb thermometer is coated with a water infiltrated fabric, and the lower end of the fabric is soaked into a water container containing water; the rear end of the standard air flue is connected with a centrifugal fan; the centrifugal fan is connected with a frequency converter; and the frequency converter is connected with a wind speed sensor through a PID (Proportion Integration Differentiation) controller. The Ventilation type wet and dry bulb temperature measuring device disclosed by the invention has the beneficial effect that the device is applicable to the measurement of air dry wet bulb temperatures, and has the advantages of direct indication, convenience in operate, high precision, strong stability, adjustable wind speed and the like.
Description
Technical field
The present invention relates to a kind of aerial temperature and humidity proving installation, relate in particular to a kind of ventilated type wet and dry bulb temperature proving installation.
Background technology
Humidity is the physical quantity that the expression air is done wet degree, is what yardstick of expression water in air vapor content.If produce with living environment in air humidity too high or too low, the people is not felt well, consequently influence healthyly, even can influence industrial normally carrying out and the storage of historical relic and food.For the humidity of control air well, produce and requirement in life to satisfy, should measure the humidity of air; And control effectively through the air of conditioner to the room, yet, because that air humidity is influenced by external condition is too big; Brought many difficult problems for so the accurate measurement and the control of humidity; Therefore, the accurate detection of air humidity is absolutely necessary, it is the same with parameter such as temperature all to be the important indicator of weighing air condition and quality.
Air humidity method for expressing commonly used has: three kinds of absolute humidity (density), relative humidity and water capacities.In many state parameters of air; Pressure, temperature are to be prone to survey; Water capacity and density are difficult for directly measuring, and relative humidity can be surveyed, but conventional method is not accurate enough; Therefore in order accurately to obtain air humidity value (being often referred to relative humidity), adopting wet-and-dry bulb thermometer to measure air condition just becomes main means commonly used.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of ventilated type wet and dry bulb temperature proving installation, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention realizes through following technical scheme:
The present invention includes: standard air chute; Settle a normal stream buret at the front end of described standard air chute; In the junction of said normal stream buret and standard air chute, standard air chute, settle a honeycomb screen; A fixing respectively dry bulb thermometer and wet bulb thermometer on the described standard air chute outside; On the thermometer bulb of said wet bulb thermometer, be surrounded by the fabric of soakage water, the fabric lower end is immersed in the water container that is filled with water; Connect a centrifugal blower in described standard air chute rear end; Described centrifugal blower connects a frequency converter; Described frequency converter connects an air velocity transducer through the PID controller.
Compared with prior art, the invention has the beneficial effects as follows: be applicable to measurement, have advantages such as reading is directly perceived, easy to operate, precision is high, stability is strong, wind speed is adjustable the air wet and dry bulb temperature.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
Visible by Fig. 1: as to the present invention includes: standard air chute 9; Settle a normal stream buret 1 at the front end of described standard air chute 9; Arrangement one honeycomb screen 2 in the junction of said normal stream buret 1 and standard air chute 9, standard air chute 9; A fixing respectively dry bulb thermometer 3 and wet bulb thermometer 4 on described standard air chute 9 outsides; On the thermometer bulb of said wet bulb thermometer 4, be surrounded by the fabric of soakage water, the fabric lower end is immersed in the water container 5 that is filled with water; Connect a centrifugal blower 6 in described standard air chute 9 rear ends; Described centrifugal blower 6 connects a frequency converter 8; Described frequency converter 8 connects an air velocity transducer 10 through PID controller 7.
The present invention adopts suction type to introduce air in standard air chute, adds standard flowtube and honeycomb screen at its front end simultaneously, makes air-flow even and stable.Dried, wet bulb thermometer adopts two identical mercurys (or glass) thermometer; Can measure dry-bulb temperature and wet-bulb temperature simultaneously; Wherein be surrounded by the fabric of soakage water on the thermometer bulb of wet bulb thermometer, the fabric lower end is immersed in the water container that is filled with water, and two thermometers are installed on the standard air chute.Adopt frequency control, through the rotating speed of frequency converter adjustment blower fan, thus the wind speed (3～5m/s) in the control criterion air channel.Whole testing device is integrated, is easy to carry with mobile.
Principle of work of the present invention is: before device uses for the first time, the wind speed in the standard air chute is demarcated, confirmed the corresponding relation (use later on and need not to demarcate again) of wind speed in blower fan frequency and the standard air chute; Before the starter gear; The water of inspection in the water container whether meet the demands and the wet bulb thermometer thermometer bulb on the fabric of soakage water whether suitable, connect the centrifugal blower power supply then, starter gear; Change the frequency of blower fan through frequency converter; The mean wind speed of standard air chute is controlled at a certain air speed value between 3～5m/s, behind the system stability, can reads reading dried, wet bulb thermometer respectively.
Temperature-measuring range of the present invention: 0～50 ℃.
Testing process of the present invention is: check at first whether water in the water container meets the demands and the wet bulb thermometer thermometer bulb on the fabric of soakage water whether suitable; Connect the centrifugal blower power supply then; Starter gear changes the frequency of centrifugal blower through frequency converter, and the mean wind speed of standard air chute is controlled at a certain air speed value between 3～5m/s; Behind the system stability, read reading dried, wet bulb thermometer respectively.
Claims (1)
1. a ventilated type wet and dry bulb temperature proving installation is characterized in that comprising: standard air chute; Settle a normal stream buret at the front end of described standard air chute; In the junction of said normal stream buret and standard air chute, standard air chute, settle a honeycomb screen; A fixing respectively dry bulb thermometer and wet bulb thermometer on the described standard air chute outside; On the thermometer bulb of said wet bulb thermometer, be surrounded by the fabric of soakage water, the fabric lower end is immersed in the water container that is filled with water; Connect a centrifugal blower in described standard air chute rear end; Described centrifugal blower connects a frequency converter; Described frequency converter connects an air velocity transducer through the PID controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100198352A CN102590277A (en) | 2012-01-21 | 2012-01-21 | Ventilation type wet and dry bulb temperature measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100198352A CN102590277A (en) | 2012-01-21 | 2012-01-21 | Ventilation type wet and dry bulb temperature measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102590277A true CN102590277A (en) | 2012-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100198352A Pending CN102590277A (en) | 2012-01-21 | 2012-01-21 | Ventilation type wet and dry bulb temperature measuring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN102590277A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108827485A (en) * | 2018-04-24 | 2018-11-16 | 上海天谱安全技术咨询有限公司 | A kind of wet bubble globe temperature indexer |
| CN110488894A (en) * | 2019-07-31 | 2019-11-22 | 中国电器科学研究院股份有限公司 | A kind of aerial temperature and humidity test device and the method using its progress Temperature and Humidity Control |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231218A (en) * | 2008-02-02 | 2008-07-30 | 上海理工大学 | Integrated performance test method for vaporization cooling in various heat exchange models and modes |
| CN102095520A (en) * | 2011-01-21 | 2011-06-15 | 华南理工大学 | Dry bulb thermometer and wet bulb thermometer capable of preventing heat radiation of motor |
| CN202433331U (en) * | 2012-01-21 | 2012-09-12 | 上海显隆通风设备有限公司 | Ventilated dry-wet-bulb temperature test device |
-
2012
- 2012-01-21 CN CN2012100198352A patent/CN102590277A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231218A (en) * | 2008-02-02 | 2008-07-30 | 上海理工大学 | Integrated performance test method for vaporization cooling in various heat exchange models and modes |
| CN102095520A (en) * | 2011-01-21 | 2011-06-15 | 华南理工大学 | Dry bulb thermometer and wet bulb thermometer capable of preventing heat radiation of motor |
| CN202433331U (en) * | 2012-01-21 | 2012-09-12 | 上海显隆通风设备有限公司 | Ventilated dry-wet-bulb temperature test device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108827485A (en) * | 2018-04-24 | 2018-11-16 | 上海天谱安全技术咨询有限公司 | A kind of wet bubble globe temperature indexer |
| CN110488894A (en) * | 2019-07-31 | 2019-11-22 | 中国电器科学研究院股份有限公司 | A kind of aerial temperature and humidity test device and the method using its progress Temperature and Humidity Control |
| CN110488894B (en) * | 2019-07-31 | 2021-07-30 | 中国电器科学研究院股份有限公司 | Air temperature and humidity testing device and method for controlling temperature and humidity by using same |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120718 |