CN103447100B - Constant-temperature and constant-humidity box - Google Patents
Constant-temperature and constant-humidity box Download PDFInfo
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- CN103447100B CN103447100B CN201310405505.1A CN201310405505A CN103447100B CN 103447100 B CN103447100 B CN 103447100B CN 201310405505 A CN201310405505 A CN 201310405505A CN 103447100 B CN103447100 B CN 103447100B
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- saturated solution
- gas
- chamber
- air path
- circulation air
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- 239000012047 saturated solution Substances 0.000 claims abstract description 42
- 150000003839 salts Chemical class 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000007791 dehumidification Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Devices For Use In Laboratory Experiments (AREA)
Abstract
The invention provides a constant-temperature and constant-humidity box which is simple in structure, low in cost, low in energy consumption, convenient to operate, high in accuracy and high in repeatability. The constant-temperature and constant-humidity box comprises a box body with an inner cavity, wherein a working cavity which is used for placing a workpiece is formed in the inner cavity; a container which is used for containing a saturated solution of salt is arranged in the inner cavity; a crystal of solute salt is arranged in the saturated solution; a circulating air channel is arranged in the inner cavity and is used for communicating the working cavity with the upper space of the liquid surface of the saturated solution; a circulating fan is arranged in the circulating air channel; when the circulating fan works, air circularly flows in the circulating air channel.
Description
Technical field
This technology relates to climatic chamber.
Background technology
The climatic chamber that current laboratory is commonly used mainly is divided into two classes: a class is cultivated for microorganism and breeding experiment, and its feature is because airflow circulating is bad, and humiture fluctuation is large, lack of homogeneity, and can not build low-humidity environment condition.Another kind of is high low temperature cycles test case, and it can build temperature at-20 DEG C to 150 DEG C, and humidity is in the environmental condition of the larger temperature humidity range of 30%-98%, and before being mainly used in various material properties test, internal moisture state adjusts the work of balance.High low temperature cycles test case mainly comprises the sensor probe, heating tube, steam generator, condenser etc. of measuring humiture.Heating tube (power is generally more than 1.5 kilowatts) is mainly used to the temperature of humid air in regulating box, and it controls automatically by thermometric instrument; Steam generator (power is generally also more than 1.5 kilowatts) builds relative humidity required in case by producing steam, and this part is by humidity instrument automatic control; Condenser (power is generally more than 2 kilowatts) is then used for reducing the temperature and humidity of environment, and its opening and closing are realized by manual control shift knob.Generally when the environment needing construction room temperature, less than 85% humidity such, need to make heating tube, steam generator, condenser be in opening always, namely this equipment is while at warming and humidifying, while at cooling dehumidification, by that expend some contradictions or the unnecessary energy, make heating tube, between steam generator and condenser three, realize dynamic equilibrium, reach required humiture environment.
In addition, the humidity of this kind of high low temperature cycles test case is made wet-bulb thermometer method dry up and is measured, and its certainty of measurement and stability are all very poor.If only evaluated from thermometric angle, the error of the temperature inside the box belongs to common and acceptable phenomenon at positive and negative 0.5 DEG C, but for moisture measurement, we are by calculating, be not difficult to find, the error of thermometer at positive and negative 0.5 DEG C time, the error of humidity reaches about 10%, is 12% corresponding to the moisture content error of timber under these two kinds of environment.And in fact, the moisture measurement error of this kind equipment of our a lot of laboratories use is also far away not only like this now, even twice use before and after instrument on the same stage, also can due to each side reasons such as gauze, thermometer precision, be difficult to the repeatability realizing experiment condition, thus some research works cannot be carried out effectively smoothly.In addition, because the dehumidification of condenser is limited in one's ability, and device interior has the problem of the designs such as aqueous water existence all the time, and this kind equipment is difficult to the environment building relative humidity less than 20%.
Summary of the invention
The object of this technology is to provide that a kind of structure is simple, with low cost, energy consumption is low, easy to operate, precision is high, the climatic chamber of favorable repeatability.
This climatic chamber, it comprises the casing with inner chamber, has a working chamber for place work piece in inner chamber, has the vessel of the saturated solution of a kind of salt of splendid attire, have the crystalline solid of contained solute salt in saturated solution in inner chamber; In described inner chamber, have a circulation air path, described circulation air path is connected the space of working chamber with saturated solution ullage, has circulating fan in this circulation air path, and during circulating fan work, wind is at circulation air path internal circulation flow.
The beneficial effect of this technology: under certain temperature and pressure, the gas phase relative humidity of the saturated solution of salt is constant.Circulating fan works, gas circulating flow in circulation air path, the gas of the gas in working chamber and saturated solution ullage is flowed fast, the gas in working chamber can be made consistent with the water content of the gas of saturated solution ullage all the time and be stabilized in the relative humidity of needs.During the work of this device, make the temperature that inner chamber keeps certain, required humidity can be reached, and the humidity degree of accuracy is good, repeatability is high.So this device is that a kind of structure is simple, with low cost, energy consumption is low, easy to operate, precision is high, the climatic chamber of favorable repeatability.
Above-mentioned climatic chamber, it also comprises the agitating device for stirring saturated solution.In order to avoid the concentration on saturated solution surface and the concentration of bottom inconsistent, and the relative humidity of saturated solution liquid level place gas to be impacted, by agitating device, saturated solution is stirred.Described agitating device comprises the stirring vane extend in saturated solution, and stirring vane is arranged on shaft, and shaft passes casing and is connected with the stirring power set outside casing.
Above-mentioned climatic chamber, the taper that vessel are big up and small down, the lower end of taper vessel arranges outlet.The volume opposed cylindrical vessel of taper vessel are less, can reduce the consumption of saturated solution.Meanwhile, the lower end of taper vessel arranges outlet, saturated solution can be released, and is convenient for changing different types of saturated solution.
Above-mentioned climatic chamber, it also comprises the electric liquid-heating appliance heated saturated solution; The gas electrically heating device heated gas is set in described circulation air path; This climatic chamber also comprises the fluid temperature sensor for testing saturated solution temperature and the gas temperature sensor for gas temperature in test loop air channel, the output of fluid temperature sensor and gas temperature sensor all connects Programmable Logic Controller, and the device for controlling liquid heating of control electric liquid-heating appliance, the gas-heated control device of control gas electrically heating device are all connected with Programmable Logic Controller.
By electric liquid-heating appliance, saturated solution is heated, by gas electrically heating device, the gas in circulation air path is heated, the gas in circulation air path and saturated solution can be made to be rapidly heated, the temperature that Programmable Logic Controller detects according to fluid temperature sensor and gas temperature sensor controls electric liquid-heating appliance and gas electrically heating device, and both temperature can be made to reach consistent.
Accompanying drawing explanation
Fig. 1 is the front view of climatic chamber.
Fig. 2 is the top view (omitting agitating device, gas electrically heating device, workpiece etc.) of Fig. 1.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this technology is described further.
Climatic chamber shown in Figure 1, casing 2 primarily of Qianmen 21, rear wall 22, sidewall 23,24, roof 25, the composition such as diapire 26, Qianmen 21, rear wall 22, sidewall 23,24, roof 25, diapire 26 define an inner chamber 1.
Arrange vertical dividing plate 3 in inner chamber 1, the both sides of dividing plate 3 contact with sidewall 23,24, be working chamber 12, placed work rest 4 in working chamber between dividing plate 3 and Qianmen 21, place work piece 5 on work rest 4.Vessel 6 are placed on the top place of diapire 26, are positioned at the bottom of working chamber, and near Qianmen.Gap 11,14 is had respectively between the upper and lower side of dividing plate 3 and roof 25, vessel 6 upper end.
The taper that vessel 6 are big up and small down, the lower end of taper vessel arranges outlet 61.The saturated solution 7 of vessel splendid attire salt, has the crystalline solid of contained solute salt in saturated solution.There is between dividing plate 3 and rear wall 22 passage 15, circulating fan 10 is set on the top of passage.
Agitating device comprises the stirring vane 81 extend in saturated solution, and stirring vane is arranged on shaft 82, and shaft passes diapire 26 and is connected with the stirring motor 83 be positioned in gripper shoe 27.
The space 13 of gap 11, working chamber 12, saturated solution 7 ullage, gap 14, passage 15 define a circulation air path 16.When circulating fan 10 works, humid air is at circulation air path internal circulation flow (as shown by arrows).
Be provided with the gas electrically heating device 40 heated gas in passage 15, the bottom of vessel 6 is provided with the electric liquid-heating appliance 41 heated saturated solution.In the fluid temperature sensor 42 of test saturated solution temperature and test loop air channel, the gas temperature sensor 43 of gas temperature all connects Programmable Logic Controller (not shown), controls the device for controlling liquid heating (not shown) of electric liquid-heating appliance, controls the gas-heated control device (not shown) of gas electrically heating device and be all electrically connected with Programmable Logic Controller.
Embodiment 1(relative humidity is 11.3%, and temperature is 25 DEG C):
Saturated solution is the saturated solution of lithium chloride.There is in saturated solution the crystalline solid of contained solute lithium chloride.
During use, saturated solution remains on 25 DEG C, and the gas in inner chamber remains on 25 DEG C, and the relative humidity of the humid air in working chamber is 11.3%, and temperature is 25 DEG C.
Embodiment 2:(relative humidity is 64.5%, and temperature is 50 DEG C):
Saturated solution is the saturated solution of KI.There is in saturated solution the crystalline solid of contained solute KI.
During use, saturated solution remains on 50 DEG C, and the gas in inner chamber remains on 50 DEG C, and the gas humidity in working chamber is 64.5%, and temperature is 50 DEG C.
Claims (2)
1. climatic chamber, it comprises the casing with inner chamber, has one for the working chamber of place work piece, it is characterized in that in inner chamber: the vessel having the saturated solution of a kind of salt of splendid attire in inner chamber, have the crystalline solid of contained solute salt in saturated solution; In described inner chamber, have a circulation air path, described circulation air path is connected the space of working chamber with saturated solution ullage, has circulating fan in this circulation air path, and during circulating fan work, wind is at circulation air path internal circulation flow; This climatic chamber also comprises the electric liquid-heating appliance heated saturated solution; The gas electrically heating device heated gas is set in described circulation air path; For testing the fluid temperature sensor of saturated solution temperature and all connecing Programmable Logic Controller for the output of the gas temperature sensor of gas temperature in test loop air channel, the device for controlling liquid heating of control electric liquid-heating appliance, the gas-heated control device of control gas electrically heating device are all connected with Programmable Logic Controller.
2. climatic chamber as claimed in claim 1, it is characterized in that: further comprising the agitating device for stirring saturated solution.
3. climatic chamber as claimed in claim 2, it is characterized in that: described agitating device comprises the stirring vane extend in saturated solution, stirring vane is arranged on shaft, and shaft passes casing and is connected with the stirring power set outside casing.
4. climatic chamber as claimed in claim 1, it is characterized in that: the taper that vessel are big up and small down, the lower end of taper vessel arranges outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310405505.1A CN103447100B (en) | 2013-09-09 | 2013-09-09 | Constant-temperature and constant-humidity box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310405505.1A CN103447100B (en) | 2013-09-09 | 2013-09-09 | Constant-temperature and constant-humidity box |
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| Publication Number | Publication Date |
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| CN103447100A CN103447100A (en) | 2013-12-18 |
| CN103447100B true CN103447100B (en) | 2015-03-18 |
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| CN201310405505.1A Expired - Fee Related CN103447100B (en) | 2013-09-09 | 2013-09-09 | Constant-temperature and constant-humidity box |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128213B (en) * | 2014-08-04 | 2015-11-18 | 广州赛宝计量检测中心服务有限公司 | One makes climatic environmental testing equipment wind speed stablize and uniform device |
| CN104117394B (en) * | 2014-08-04 | 2016-07-06 | 广州赛宝计量检测中心服务有限公司 | A kind of by the humiture test box of liquid heating and constant temperature |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63229152A (en) * | 1987-03-18 | 1988-09-26 | Hitachi Ltd | Thermostatic and humidistatic apparatus |
| JPH10288382A (en) * | 1997-04-14 | 1998-10-27 | Orion Mach Co Ltd | Constant temperature and humidity air supply device |
| CN1544911A (en) * | 2003-11-27 | 2004-11-10 | 中国科学院武汉岩土力学研究所 | Apparatus and method for testing maximal moisture regain and content of soil |
| CN102252932A (en) * | 2010-12-13 | 2011-11-23 | 中国建筑材料科学研究总院 | Performance testing equipment for humidifying function material and testing method |
| CN202201887U (en) * | 2011-09-13 | 2012-04-25 | 北京大北农科技集团股份有限公司 | Constant temperature and humidity chamber used for determining bacterial powder stability of feed additive |
-
2013
- 2013-09-09 CN CN201310405505.1A patent/CN103447100B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63229152A (en) * | 1987-03-18 | 1988-09-26 | Hitachi Ltd | Thermostatic and humidistatic apparatus |
| JPH10288382A (en) * | 1997-04-14 | 1998-10-27 | Orion Mach Co Ltd | Constant temperature and humidity air supply device |
| CN1544911A (en) * | 2003-11-27 | 2004-11-10 | 中国科学院武汉岩土力学研究所 | Apparatus and method for testing maximal moisture regain and content of soil |
| CN102252932A (en) * | 2010-12-13 | 2011-11-23 | 中国建筑材料科学研究总院 | Performance testing equipment for humidifying function material and testing method |
| CN202201887U (en) * | 2011-09-13 | 2012-04-25 | 北京大北农科技集团股份有限公司 | Constant temperature and humidity chamber used for determining bacterial powder stability of feed additive |
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| CN103447100A (en) | 2013-12-18 |
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Application publication date: 20131218 Assignee: Nanjing Defu Test Equipment Co.,Ltd. Assignor: Nanjing Forestry University Contract record no.: X2019320000031 Denomination of invention: Constant temperature humidity chamber Granted publication date: 20150318 License type: Common License Record date: 20190813 Application publication date: 20131218 Assignee: Nanjing Mango Automation Technology Co.,Ltd. Assignor: Nanjing Forestry University Contract record no.: X2019320000030 Denomination of invention: Constant temperature humidity chamber Granted publication date: 20150318 License type: Common License Record date: 20190813 |
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Granted publication date: 20150318 |