CN104117394A - Thermostatic temperature and humidity experimental box heated by liquid - Google Patents
Thermostatic temperature and humidity experimental box heated by liquid Download PDFInfo
- Publication number
- CN104117394A CN104117394A CN201410380254.0A CN201410380254A CN104117394A CN 104117394 A CN104117394 A CN 104117394A CN 201410380254 A CN201410380254 A CN 201410380254A CN 104117394 A CN104117394 A CN 104117394A
- Authority
- CN
- China
- Prior art keywords
- air channel
- liquid
- test box
- air
- constant temperature
- 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.)
- Granted
Links
Landscapes
- Devices For Use In Laboratory Experiments (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a thermostatic temperature and humidity experimental box heated by a liquid. The experimental box is structurally characterized by comprising a liquid thermostatic treatment device and an air channel positioned in the body of the experimental box, wherein the vertically arranged liquid thermostatic treatment device and the air channel are separated by a metal plate; the upper and lower ends of the air channel are provided with the air outlet section and air intake section of the air channel respectively; a humidifier and a dehumidifier which are used for adjusting the temperature and humidity of air are arranged in the air intake section of the air channel; the inner wall, which is dead against the air outlet section and the air intake section of the air channel, of the experimental box is of an arc-shaped structure. Within the temperature range of minus 70 to 180 DEG C, the stability and uniformity of the temperature can reach the level of +/- 0.05 DEG C and 0.1 DEG C respectively; within the humidity range of 30% to 98%RH, the stability and uniformity of the humidity can reach the level of +/- 0.5%RH and 1%RH; the stability and uniformity of both the temperature and humidity are improved and the quality improvement of temperature and humidity environment experiment is facilitated.
Description
Technical field
The present invention relates to a kind of environmental test equipment, relate in particular to a kind of humiture test box by heating liquid and constant temperature.
Background technology
Any product all can stand the increasingly extensive electric and electronic product of different environmental conditions, particularly application, and the environmental condition standing becomes increasingly complex various.Thereby it is to guarantee the requisite important step of its high-quality that electric and electronic product is carried out to manual simulation's environmental test.Manual simulation's environmental test is the scientific epitomization of actual environment impact, has typification, standardization, easy to use and the feature such as be convenient to relatively.The variation of environmental condition and the importance of environmental test, also proposed stricter requirement to environmental test equipment.
Humidity Test is most important test in environmental test.Fault analysis to air environment whole year shows, more than 50% fault is caused by various environmental factors, and humiture environmental factor causes the fault rate of electronic equipment approximately 32.2%, the importance of visible Humidity Test in environmental test.
Therefore, make great efforts to improve the technical performance of humiture test box (equipment), to improving the environmental test quality of product, have important effect.
Current humiture test box, in-70 ℃～180 ℃ temperature ranges, the stability of temperature and uniformity, generally can only reach respectively ± 0.5 ℃ and 4 ℃, small part is (being generally at 0 ℃～100 ℃) in narrower temperature range, can reach respectively ± 0.2 ℃ and 2 ℃.In the humidity range of 30%RH～98%RH (at this moment gas temperature is at 20 ℃～90 ℃), the stability of humidity and uniformity, generally can only reach respectively ± 1%RH and 6%RH.
Temperature stability and the uniformity of at present best liquid thermostatic bath, reached respectively ± 0.0008 ℃ and 0.002 ℃.Simple liquid thermostatic bath that commonly use, very common, in-70 ℃～180 ℃ temperature ranges, the stability of temperature and uniformity, can easily reach ± level of 0.02 ℃ and 0.05 ℃.
The humiture test box that the air of take is medium, the stability of temperature and uniformity, and take the thermostat that liquid is medium and compare, more than differing several orders of magnitude.Tracing it to its cause, is mainly that character and the mode of heating by air causes.
Poor thermal conductivity and thermal capacity are little is the inherent characteristic of air, and in contrast, the good and thermal capacity of thermal conductivity is greatly the inherent characteristic of liquid.
This is that the project organization of current humiture test box adopts structure as shown in Figure 3 without exception, it comprise casing 1, heat-insulation layer 2, wind direction adjusting plate 3, blower fan drive motors 4, blower fan 5, air-duct clapboard 6, heating element heater 7, regulate air channel 8, refrigerator 9 (condenser) and humidifier 10.It arranges at the rear portion of working space and regulates air channel 8, regulates in air channel 8 humidifier 10, refrigerator 9 (condenser) and heater 7 are installed.Air, regulating interior, the heating element heater heating cooling through humidifier 10 humidifications, refrigerator 9 in air channel 8, regulates 8 tops, air channel blower fan 5 forced-air circulation to be installed to working space, and air is back to the interior formation circulation in air channel 8 again through working space bottom.
The major defect of above-mentioned project organization can be summarized as:
(1) heating surface (area) (HS of heating element heater is less, the heat exchange of air and heating surface is insufficient, and mobile air in air channel has considerable part directly to contact with the heating surface of heating element heater, this has just caused part air directly to be heated, and has part air directly not heated; Similar with it, the refrigeration area of refrigerator is also less, can cause identical problem;
(2) control to heating element heater, is that a kind of energising of discontinuous is controlled, and heating element heater is not the thermal source of a temperature stabilization, this when having caused air and be heated, time and be not heated;
(3) blower fan that forced-air circulation is used, fan blade does not cover whole air channel, and it is inhomogeneous that this has just caused air to flow in air channel, flows also inhomogeneous in working space;
(4) temperature is unstable and inhomogeneous, causes the unstable and inhomogeneous of humidity;
(5) working space is square structure, is unfavorable for the Uniform Flow of air.
Due to air poor thermal conductivity, inherent characteristic that thermal capacity is little, this has just caused the stability of humiture test box temperature and uniformity can not reach higher level.Meanwhile, be subject to the unstable and inhomogeneous impact of temperature, the stability of humidity and uniformity can not reach higher level.
Humidity in environmental test represents by relative humidity, and the definition of relative humidity is corresponding with the temperature conditions of humid air, and under the condition that in air, contained aqueous vapor is identical, air themperature is different, and the relative humidity of air is different.Research shows, the aerial distribution of aqueous vapor is that relative humidity unstability and inhomogeneities are mainly unstable and inhomogeneous the causing due to temperature uniformly.Improving stability and the uniformity of air humidity, is in fact mainly stability and the uniformity that improves air themperature.Therefore, improve stability and the uniformity of humiture test box humidity, need to set about from improving air themperature stability and uniformity.
With the incompatibility of air, the good and thermal capacity of thermal conductivity is greatly the inherent characteristic of liquid.Use heating element heater, refrigerator directly to heating liquid and cooling, by stirring, liquid is flowed in test chamber, the stability of the temperature of the liquid thermostatic bath obtaining like this and uniformity, can exceed the several orders of magnitude of humiture test box.
Summary of the invention
The object of this invention is to provide a kind of humiture test box by heating liquid and constant temperature, stability and the uniformity of its temperature and humidity are all significantly improved, and have also improved the quality of humiture environmental test.
The present invention is achieved like this, and for current humiture test box, adopts heating element heater, refrigerator directly to air heat and cooling, can not obtain good stability and homogeneity question, and the technical scheme that the present invention takes is:
(1) use the liquid of temperature stabilization in liquid thermostatic bath to heat and constant temperature air, solving heating element heater is not the heat source of a temperature stabilization;
(2) use a large-area metallic plate to serve as heat exchanger plate, heating liquid and the constant temperature of face of metallic plate in liquid thermostatic bath, another heats and constant temperature in the face of air, and the heating surface (area) (HS that solves heating element heater is less, the insufficient problem of heat exchange of air and heating surface;
(3) use crossflow fan forced-air circulation, the fan blade of crossflow fan covers whole air channel, impels like this air Uniform Flow in air channel;
(4) wall on air channel air outlet slit opposite, is designed to arc surface, and effective like this air that improves is in working space Uniform Flow problem;
(5) adopt dehumidifier and humidifier to air dewetting or humidification.
Concrete structure of the present invention is, it comprises test box body and is filled in the heat-preservation cotton layer in inner walls, its design feature is, it also comprises liquid constant temperature treating apparatus and the air channel that is positioned at test box body, between the vertical liquid constant temperature treating apparatus arranging and air channel, by metallic plate, separated, the top and bottom in described air channel are respectively air channel wind outlet section and air channel wind feeding section, in the wind feeding section of described air channel, be provided with humidifier and the dehumidifier for adjustments of gas temperature and humidity, test box body inwall over against air channel wind outlet section and air channel wind feeding section is convex structure, this impels air to be back to equably air channel, so also for improving the uniformity of workspace temperature, created condition.Described metallic plate top and test box body inwall junction are provided with fluid sealant.
Described air channel is the slype consisting of metallic plate and air-duct clapboard, the wind outlet section end, air channel in described air channel is provided with several and is fan-shaped wind direction adjusting plate of arranging, in the wind outlet section of air channel, be also provided with crossflow fan, described crossflow fan and the second drive motors are in transmission connection.Described crossflow fan is for to run through the tubular structure of whole air channel wind outlet section along its length, as shown in Figure 2.
The liquid thermostatic bath agitator that described liquid constant temperature treating apparatus comprises liquid thermostatic bath and is positioned at liquid thermostatic bath, described liquid thermostatic bath agitator is in transmission connection with the first drive motors being positioned at outside test box body; Described liquid thermostatic bath madial wall top is provided with spout hole.Described liquid thermostatic bath and test box body have a madial wall, and this madial wall is provided with fluid sealant.
Beneficial effect of the present invention is: the deficiency that the present invention be directed to existing humiture test box is carried out innovative design, owing to having adopted liquid in liquid thermostatic bath to heat air and the method for constant temperature, stability and the uniformity of resulting standard atmosphere chamber temperature, basic identical with stability and the uniformity of liquid thermostatic bath; It is in humiture test box-70 ℃～180 ℃ of temperature ranges, and the stability of temperature and uniformity can reach respectively ± level of 0.05 ℃ and 0.1 ℃; In the humidity range of 30%RH～98%RH, the level of can reach respectively ± 0.5%RH of the stability of humidity and uniformity and 1%RH; The stability of humiture test box temperature, humidity and uniformity are brought up to a new height, thereby improve the quality of humiture environmental test.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the syndeton schematic diagram of crossflow fan of the present invention and the second drive motors.
Fig. 3 is the structural representation of traditional humiture test box.
In the drawings, 1, the drive motors 5 of casing 2, heat-insulation layer 3, wind direction adjusting plate 4, blower fan, blower fan 6, air-duct clapboard 7, heating element heater 8, regulate air channel 9, refrigerator 10, humidifier.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
As shown in Figure 1, a lateral layout of liquid thermostatic bath 114 is become not have to the metallic plate 106 of heat-insulation layer 102, block of metal plate 106 serves as the whole side of 112 the insides, air channel of standard atmosphere chamber.A face of metallic plate 106, by heating liquid and the constant temperature of liquid thermostatic bath 114, utilizes the heat conductivility that metal is good, and another face just can, to air heat and constant temperature, so just have been realized liquid to the heating of air and constant temperature.Due to the inherent characteristic that liquid thermal conductivity is good, thermal capacity is large etc., fluid temperature stability in liquid thermostatic bath 114 and uniformity are very good, the temperature stability of block of metal plate 106 and uniformity, basic identical with fluid temperature stability and uniformity, metallic plate 106 has just become temperature stabilization uniform thermostat metal plate again.This has just solved current humiture test box use heating element heater is not the thermal source of temperature stabilization, the problem that heating surface (area) (HS is again little.
Bottom 115 designs of dehumidifier 116 and humidifier at working space, the air channel 112 of thermostat metal plate 106 sides adopts narrows design, the benefit narrowing is that air more can be contacted with thermostat metal plate 106 fully, to carry out sufficient heat exchange with thermostat metal plate 106.
Adopt the design of crossflow fan 105 forced-air circulation, the fan blade of crossflow fan 105 covers whole air channel 112, the benefit of design is to make air flow through equably whole air channel 112 like this, i.e. 112 different positions in air channel, make air can enter air channel 112 simultaneously, leave air channel 112 simultaneously, because air is identical with the heat exchanger time of thermostat metal plate 106 in air channel 112, when air leaves behind air channel 112, the air themperature of air channel 112 outlet diverse locations is identical, and this has created condition for improving the uniformity of workspace temperature.
Concrete structure of the present invention is, it comprises test box body 101 and is connected to the heat-preservation cotton layer 102 in inner walls, its design feature is, it also comprises liquid constant temperature treating apparatus and the air channel 112 that is positioned at test box body 101, between the vertical liquid constant temperature treating apparatus arranging and air channel 112, by metallic plate 106, separated, the top and bottom in described air channel 112 are respectively air channel wind outlet section 109 and air channel wind feeding section 117, in described air channel wind feeding section 117, be provided with humidifier 115 and dehumidifier 116 for adjustments of gas temperature and humidity, test box body 101 inwalls over against air channel wind outlet section 109 and air channel wind feeding section 117 are convex structure, this impels air to be back to equably air channel, so also for improving the uniformity of workspace temperature, created condition.Described metallic plate 106 tops and test box body 101 inwall junctions are provided with fluid sealant 107.
Described air channel 112 is the slypes that consist of metallic plate 106 and air-duct clapboard 103, air channel wind outlet section 109 ends in described air channel 112 are provided with several and are the fan-shaped wind direction adjusting plate of arranging 104, in air channel wind outlet section 109, be also provided with crossflow fan 105, described crossflow fan 105 and the second drive motors 118 are in transmission connection.Described crossflow fan 105 is for to run through the tubular structure of whole air channel wind outlet section 109 along its length, as shown in Figure 2.
The liquid thermostatic bath agitator 113 that described liquid constant temperature treating apparatus comprises liquid thermostatic bath 114 and is positioned at liquid thermostatic bath 114, described liquid thermostatic bath agitator 113 is in transmission connection with the first drive motors 108 being positioned at outside test box body 101; Described liquid thermostatic bath 114 madial wall tops are provided with spout hole 111.Described liquid thermostatic bath 114 has a madial wall with test box body 101, and this madial wall is provided with fluid sealant 110.
By the structural design of details described above, thereby obtain the highly stable and uniform standard atmosphere chamber by heating liquid and constant temperature of a kind of temperature and humidity.
Operation principle of the present invention is, crossflow fan 105 drives Air Flows, through wind direction adjusting plate 104, regulates air flow working space diverse locations, and air is back to air channel wind feeding section 117 from top to bottom, enters air channel 112 and forms circulation.
When air enters air channel wind feeding section 117, dehumidified device 116 dehumidifying, or by humidifier 115 humidifications.Heating liquid and the constant temperature of metallic plate 106 in liquid thermostatic bath 114, due to the thermal conductive resin of metal, air 112 is interiorly heated and constant temperature by metallic plate 106 when mobile in air channel.
Compare with the conventional apparatus structure of schematic diagram 3, the method for the invention is summarized as follows:
(1) traditional method is used heating element heater and refrigerator directly to air heat and cooling, this method is used temperature stabilization in liquid thermostatic bath with uniform liquid, air to be heated and constant temperature, the air themperature and the fluid temperature that obtain are like this basic identical, and stability is also basic identical; The raising of temperature stability makes the stability of humidity be improved simultaneously;
(2) by a large metallic plate, realize the heat exchange of liquid-to-air;
(3) current method is used general blower fan, and fan blade does not cover whole air channel, and this method is used crossflow fan, and fan blade covers whole air channel, and air is flowed more equably in air channel;
(4) this method adopts the design that narrow in air channel, approximately only has 1/10 of current air channel, makes air carry out more fully heat exchange with thermostat metal plate;
(5) this method adopts the circular-arc design in side on opposite, air channel, and air can be back in air channel more equably;
(6) dehumidifier and humidifier design are in working space bottom.
Claims (7)
1. the humiture test box by heating liquid and constant temperature, it comprises test box body (101) and is filled in the heat-preservation cotton layer (102) in inner walls, it is characterized in that, it also comprises liquid constant temperature treating apparatus and air channel (112) that are positioned at test box body (101), between the vertical liquid constant temperature treating apparatus arranging and air channel (112), by metallic plate (106), separated, the top and bottom in described air channel (112) are respectively air channel wind outlet section (109) and air channel wind feeding section (117), in described air channel wind feeding section (117), be provided with humidifier (115) and dehumidifier (116) for adjustments of gas temperature and humidity, test box body (101) inwall over against air channel wind outlet section (109) and air channel wind feeding section (117) is convex structure.
2. the humiture test box by heating liquid and constant temperature as claimed in claim 1, it is characterized in that, described air channel (112) is the slype consisting of metallic plate (106) and air-duct clapboard (103), air channel wind outlet section (109) end in described air channel (112) is provided with several and is fan-shaped wind direction adjusting plate of arranging (104), in air channel wind outlet section (109), be also provided with crossflow fan (105), described crossflow fan (105) is in transmission connection with the second drive motors (118).
3. the humiture test box by heating liquid and constant temperature as claimed in claim 2, is characterized in that, described crossflow fan (105) is for running through along its length the tubular structure of whole air channel wind outlet section (109).
4. the humiture test box by heating liquid and constant temperature as claimed in claim 1, it is characterized in that, the liquid thermostatic bath agitator (113) that described liquid constant temperature treating apparatus comprises liquid thermostatic bath (114) and is positioned at liquid thermostatic bath (114), described liquid thermostatic bath agitator (113) first drive motors (108) outer with being positioned at test box body (101) is in transmission connection.
5. the humiture test box by heating liquid and constant temperature as claimed in claim 4, is characterized in that, described liquid thermostatic bath (114) madial wall top is provided with spout hole (111).
6. the humiture test box by heating liquid and constant temperature as described in claim 4 or 5, is characterized in that, described liquid thermostatic bath (114) has a madial wall with test box body (101), and this madial wall is provided with fluid sealant (110).
7. the humiture test box by heating liquid and constant temperature as claimed in claim 1, is characterized in that, described metallic plate (106) top and test box body (101) inwall junction are provided with fluid sealant (107).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410380254.0A CN104117394B (en) | 2014-08-04 | 2014-08-04 | A kind of by the humiture test box of liquid heating and constant temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410380254.0A CN104117394B (en) | 2014-08-04 | 2014-08-04 | A kind of by the humiture test box of liquid heating and constant temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104117394A true CN104117394A (en) | 2014-10-29 |
| CN104117394B CN104117394B (en) | 2016-07-06 |
Family
ID=51763163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410380254.0A Active CN104117394B (en) | 2014-08-04 | 2014-08-04 | A kind of by the humiture test box of liquid heating and constant temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104117394B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519193A (en) * | 2018-06-08 | 2018-09-11 | 北京市计量检测科学研究院 | An environmental test device for the verification of pressure measuring instruments |
| CN114994078A (en) * | 2022-08-01 | 2022-09-02 | 深圳市南德谱光电有限公司 | A kind of polarizer assembly line production bubble detection device |
| CN115212929A (en) * | 2022-06-28 | 2022-10-21 | 太原煤科检测技术有限公司 | Environmental test chamber |
| CN115382584A (en) * | 2022-09-02 | 2022-11-25 | 江苏拓米洛环境试验设备有限公司 | Damp-heat test box |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06141752A (en) * | 1992-10-30 | 1994-05-24 | Sanyo Electric Co Ltd | Constant temperature and humidity device |
| CN201579061U (en) * | 2010-01-07 | 2010-09-15 | 东莞市立佳精密仪器有限公司 | A constant temperature and humidity chamber |
| CN102974406A (en) * | 2012-11-14 | 2013-03-20 | 天津天维移动通讯终端检测有限公司 | Constant temperature humidity chamber |
| CN203170340U (en) * | 2013-03-12 | 2013-09-04 | 东莞市升微机电设备科技有限公司 | Constant temperature and humidity test chamber |
| CN203170337U (en) * | 2013-03-12 | 2013-09-04 | 东莞市升微机电设备科技有限公司 | Constant temperature and humidity test chamber air duct structure |
| CN103447100A (en) * | 2013-09-09 | 2013-12-18 | 南京林业大学 | Constant-temperature and constant-humidity box |
| CN204122131U (en) * | 2014-08-04 | 2015-01-28 | 广州赛宝计量检测中心服务有限公司 | A kind of humiture test box by heating liquid and constant temperature |
-
2014
- 2014-08-04 CN CN201410380254.0A patent/CN104117394B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06141752A (en) * | 1992-10-30 | 1994-05-24 | Sanyo Electric Co Ltd | Constant temperature and humidity device |
| CN201579061U (en) * | 2010-01-07 | 2010-09-15 | 东莞市立佳精密仪器有限公司 | A constant temperature and humidity chamber |
| CN102974406A (en) * | 2012-11-14 | 2013-03-20 | 天津天维移动通讯终端检测有限公司 | Constant temperature humidity chamber |
| CN203170340U (en) * | 2013-03-12 | 2013-09-04 | 东莞市升微机电设备科技有限公司 | Constant temperature and humidity test chamber |
| CN203170337U (en) * | 2013-03-12 | 2013-09-04 | 东莞市升微机电设备科技有限公司 | Constant temperature and humidity test chamber air duct structure |
| CN103447100A (en) * | 2013-09-09 | 2013-12-18 | 南京林业大学 | Constant-temperature and constant-humidity box |
| CN204122131U (en) * | 2014-08-04 | 2015-01-28 | 广州赛宝计量检测中心服务有限公司 | A kind of humiture test box by heating liquid and constant temperature |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519193A (en) * | 2018-06-08 | 2018-09-11 | 北京市计量检测科学研究院 | An environmental test device for the verification of pressure measuring instruments |
| CN115212929A (en) * | 2022-06-28 | 2022-10-21 | 太原煤科检测技术有限公司 | Environmental test chamber |
| CN114994078A (en) * | 2022-08-01 | 2022-09-02 | 深圳市南德谱光电有限公司 | A kind of polarizer assembly line production bubble detection device |
| CN115382584A (en) * | 2022-09-02 | 2022-11-25 | 江苏拓米洛环境试验设备有限公司 | Damp-heat test box |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104117394B (en) | 2016-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104128213B (en) | One makes climatic environmental testing equipment wind speed stablize and uniform device | |
| CN104117394A (en) | Thermostatic temperature and humidity experimental box heated by liquid | |
| CN202130128U (en) | Ink thermostatic control device for inkjet machine | |
| CN106167134A (en) | An intelligent cigar box structure | |
| CN103697746B (en) | A kind of heat exchanger flow equalizer | |
| CN204122131U (en) | A kind of humiture test box by heating liquid and constant temperature | |
| CN204122132U (en) | One makes climatic environmental testing equipment wind speed stablize and uniform device | |
| CN203577811U (en) | Constant-temperature and constant-humidity chamber | |
| CN102168014B (en) | Cell culture drying test box | |
| CN104132686B (en) | Thermostatic temperature and humidity calibration box heated through liquid | |
| CN204128587U (en) | A kind of temperature/humidity verification box by heating liquid and constant temperature | |
| CN204544215U (en) | A kind of biochemical cultivation case | |
| CN104107731B (en) | A kind of temperature test chamber by heating liquid and constant temperature | |
| CN204122133U (en) | A kind of temperature test chamber by heating liquid and constant temperature | |
| CN208653524U (en) | A kind of novel warm hygrostat | |
| CN110308755A (en) | The controllable flow-control equipment of gas temperature humidity | |
| CN206262563U (en) | A constant temperature and humidity test chamber air outlet structure | |
| CN205216233U (en) | Continuous board -like liquid enrichment facility | |
| CN206771533U (en) | Ceiling machine | |
| CN206721209U (en) | A kind of experiment insulating box | |
| CN205540354U (en) | Solar energy air heat collector thermal behavior detects wet device of air accuse control by temperature change of usefulness | |
| CN218328465U (en) | Temperature adjusting equipment | |
| CN203814289U (en) | Greenhouse indoor temperature-regulating device | |
| CN203642774U (en) | Flow equalizing device of heat exchanger | |
| CN204128995U (en) | A kind of humidity generator of high temperature of variable wind speed |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |