CN108201902B - TMRadConstant temperature box of tester - Google Patents
TMRadConstant temperature box of tester Download PDFInfo
- Publication number
- CN108201902B CN108201902B CN201611168580.0A CN201611168580A CN108201902B CN 108201902 B CN108201902 B CN 108201902B CN 201611168580 A CN201611168580 A CN 201611168580A CN 108201902 B CN108201902 B CN 108201902B
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- Prior art keywords
- side wall
- guide
- box
- guide fins
- fins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L1/00—Enclosures; Chambers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
- B01L7/50—Cryostats
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
Abstract
The present invention relates to TMRadConstant temperature box of tester. This thermostated container is provided with air inlet channel and air outlet flow channel including the box that is used for holding experimental sample in the box, and air inlet channel's entry and air outlet flow channel's export all form on first lateral wall, a plurality of water conservancy diversion fins of parallel arrangement, a plurality of water conservancy diversion fins are spaced apart in the axial and install on the relative circumference lateral wall of box and extend towards the inside of box through the bracing piece respectively. The thermotank is internally provided with a plurality of guide fins which can guide hot air to form a plurality of small circular flows in the thermotank and further enable chemicals in the thermotank to be uniformly heated, so that accurate TMR is obtainedadAnd (4) data.
Description
Technical Field
The invention relates to the field of chemical storage, in particular to TMRadConstant temperature box of tester.
Background
It is widely recognized that hazardous chemicals such as peroxides, self-reacting substances, etc. tend to undergo decomposition reactions during storage and transportation, which sometimes lead to very serious safety concerns.
It has been found that ambient temperature may affect the rate of decomposition reactionThe rate of the decomposition reaction will affect the rate of heat generation within the chemical package. When the heat generation rate is greater than the heat dissipation rate of the pack, heat accumulation occurs in the pack. This accumulated heat further promotes the decomposition reaction. When the bales are stacked on a large scale, the heat transfer environment of the inner bale is similar to a thermally insulating environment due to the barrier and thermal insulation of the outer bale. In this case, the time until the decomposition reaction of the chemical in the package reaches the maximum reaction rate, i.e. TMRadIt is very important to guide the safe storage and transportation process of chemicals.
Incubators are commonly used in laboratories to simulate the aforementioned insulating environment to obtain TMR of chemicals within the incubatoradAnd (4) data. However, in general, the oven uses natural convection heat transfer of air, which causes various portions of the chemicals inside the oven to be exposed to air flows of different temperatures, i.e., uneven heating of the chemicals, resulting in the TMR obtainedadThe data is inaccurate.
Disclosure of Invention
Aiming at the problems, the invention provides a TMRadConstant temperature box of tester. The thermotank is internally provided with a plurality of guide fins which can guide hot air to form a plurality of small circular flows in the thermotank and further enable chemicals in the thermotank to be uniformly heated, so that accurate TMR is obtainedadAnd (4) data.
TMR according to the inventionadThe constant temperature box of the tester comprises a box body for accommodating an experimental sample, wherein an air inlet channel and an air outlet channel are arranged in the box body, and an inlet of the air inlet channel and an outlet of the air outlet channel are formed on a first side wall; a plurality of guide fins arranged in parallel, the plurality of guide fins being spaced apart in the axial direction and extending toward the interior of the box body by being mounted on opposite circumferential side walls of the box body by support rods, respectively.
According to the incubator of the present invention, hot air is introduced into the interior of the incubator through the intake duct. The plurality of guide fins spaced from the box side walls direct the hot air that would otherwise flow along the box walls into a plurality of sub-streams and further create a small local annular flow. These small loops have the same temperature andand the experimental sample is heated in all directions, so that the experimental sample is uniformly heated as a whole, and the TMR can be more accurately obtainedadAnd (4) data.
In one embodiment, the plurality of guide fins are each parallel to the first sidewall.
In one embodiment, the plurality of guide fins are each configured as a wedge comprising a slope facing the first sidewall and a straight face opposite the slope, a small end of the wedge facing the circumferential sidewall of the box and a large end facing the interior of the box. The inclined surfaces of the guide fins contribute to the formation of a circulating flow of the substream of hot air. In a preferred embodiment, the angle between the inclined surface and the straight surface is a first acute angle between 15 ° and 25 °, preferably 20 °. Such a small first acute angle does not block the flow of the hot air so that the plurality of small loops formed by the plurality of guide fins are substantially identical, which contributes to uniform heating of the experimental sample. Furthermore, such a small first acute angle is sufficient to guide the substream of hot air into a small circulation, since the density of the air is small.
In one embodiment, the gaps between the plurality of guide fins and the respective circumferential side wall gradually decrease in a direction axially away from the first side wall. As the hot air stream flows along the tank walls, the upstream guide fins continually intercept the hot air stream, resulting in less hot air stream reaching the downstream. Thus, positioning the downstream guide fins closer to the side wall helps to make the multiple small annular flows identical.
In one embodiment, the inlet flow channel and the outlet flow channel are spaced apart by a bent guide member, the guide member including a cylindrical portion connected to the first sidewall and a guide plate connected to the cylindrical portion and parallel to the first sidewall; an inlet flow passage is formed between the guide plate and the first side wall, an outlet flow passage is formed in the cylindrical portion, and a plurality of guide fins are located downstream of the guide plate. According to this structure, the hot air flow is guided by the guide member to flow directly to the circumferential side wall of the case through the air inlet flow passage, and a plurality of small circular flows are formed by the plurality of guide fins. Finally, the small circulation flows are converged together and flow out of the air outlet flow channel.
In one embodiment, the distal end of the deflector is configured as a ramp facing the inlet conduit, the ramp being at a second acute angle to the outer surface of the deflector. In a preferred embodiment, the second acute angle is between 15 ° and 25 °, preferably 20 °. The second acute angle of such an angle reduces the resistance of the hot air to the circumferential side wall of the case, thereby contributing to the hot air circulation by the guide fins.
In one embodiment, a support frame for supporting the experimental sample is further arranged in the box body, and the height of the support frame is greater than that of the guide fins. Through setting up the support frame, just need not to place experimental sample direct contact box inner wall to realized carrying out equally, evenly heating to each part of experimental sample, helped obtaining more accurate TMRadAnd (4) data.
In one embodiment, the box body is cuboid, a plurality of guide fins are not arranged on the first side wall and the rear wall opposite to the first side wall, and guide fins are arranged on the other side walls. The applicant found that, after the guide fins are provided on the remaining side walls, the rear wall pushes the most downstream small annulus of hot air towards the experimental sample. In this case, if a plurality of guide fins are also provided on the rear wall, they do not contribute to the flow of the most downstream thermal control air small circulation to the test sample, but rather disturb the flow thereof, which is not favorable for equally and uniformly heating the respective portions of the test sample.
Compared with the prior art, the invention has the advantages that: the thermotank is internally provided with a plurality of guide fins which can guide the hot air to form a plurality of small circular flows in the thermotank and further uniformly heat chemicals in the thermotank, thereby obtaining accurate TMRadAnd (4) data.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 schematically shows TMR according to one embodiment of the present inventionadThe structure of a constant temperature box of the tester;
FIG. 2 is a view in the direction A of FIG. 1;
FIG. 3 shows schematicallyTMR in FIG. 1adA hot air flow field of an incubator of the tester;
fig. 4 is an enlarged view of a portion B in fig. 1; and
fig. 5 shows schematically a cross section of a guide fin in an enlarged view.
In the drawings, like parts are provided with like reference numerals. The drawings are not to scale.
Detailed Description
The invention will be further explained with reference to the drawings.
FIG. 1 shows a TMR according to the present invention in one embodimentadThe structure of the oven 10 of the tester. As shown in fig. 1, the oven 10 includes a substantially rectangular parallelepiped box body 11. The interior of the case 11 forms a space for accommodating the test sample 2.
An inlet flow passage 201 and an outlet flow passage 202 are configured inside the case 11. Both the inlet 21 of the inlet flow path 201 and the outlet 22 of the outlet flow path 202 are formed in the first sidewall 1 of the case 11. A plurality of guide fins 204 extending into the case 11 are attached to the circumferential side wall 12 of the case 11, and no guide fin is provided on the first side wall 1 and the rear wall 13 of the case 11. These guide fins 204 are parallel to each other and preferably parallel to the first sidewall 1 (i.e., generally along the circumferential direction), and are spaced apart along the axial direction 15. In addition, the guide fins 204 are mounted on the circumferential side wall 12 by means of the support rods 14 spaced apart (i.e., gaps 16 are left between the guide fins 204 and the circumferential side wall 12) so that the hot air from the intake runner 201 can flow along the circumferential side wall 12 through the gaps 16 toward the inside of the case 11.
Fig. 2 schematically shows an inlet 21 and an outlet 22 on the first side wall 1. As can be seen from fig. 1 and 2, the inlet flow channel 201 and the outlet flow channel 202 are spaced apart by the bent guide 25. Specifically, the guide 25 includes a cylindrical portion 251 and a guide plate 252 connected to the cylindrical portion 251. The guide plate 252 is substantially flat-plate-mounted and has a circular hole in its middle portion matching the cylindrical portion 251, whereby the guide plate 252 can be mounted substantially perpendicularly to the cylindrical portion 251. A through hole 23 is opened in the first side wall 1. The cylindrical portion 251 has a diameter smaller than that of the through-hole 23 and is connected with the first sidewall 1 by a plurality of links 24, thereby mounting the guide 25 to the inside of the case 11. As a whole, the guide plate 252 is substantially parallel to the first side wall 1 and spaced from the first side wall 1 and the circumferential side wall 12. Thus, the cylindrical portion 251 forms the outlet flow path 202, and the inlet flow path 201 is formed between the guide plate 252 and the first side wall 1. In this case, the plurality of guide fins 204 mounted on the circumferential side wall 12 are downstream of the guide plate 252.
In using the incubator 10 of the present invention, the test sample 100 is first placed inside the housing 11, and then hot air is supplied to the inside of the housing 11 through the inlet 21 of the inlet flow passage 201. The hot air is directed toward the circumferential side wall 12 by the intake runner 201 and forms a stream 30 flowing downstream (or inside the box 11) along the circumferential side wall 12; the plurality of guide fins 204 mounted on the circumferential side wall 12 each intercept a portion of the hot air from the stream 30 to form a plurality of branch streams 33, and further promote the plurality of branch streams 33 to form local small annular streams 31, respectively; finally, these small ring flows 31 converge into an exhaust flow 32 that exits the housing 11 through the outlet flow path 202, as shown in FIG. 3. These small circular flows 31 and the exhaust flows 32 have the same temperature and heat the test sample 100 in all directions, whereby the test sample 100 is uniformly heated as a whole, which is very advantageous in obtaining more accurate TMRadAnd (4) data.
The tip of the guide plate 252 is configured to face the ramp 19 of the intake runner 201. The angle between the ramp 19 and the outer surface 200 of the guide plate 252 is a second acute angle 101, as shown in FIG. 4. Preferably, the second acute angle 101 is between 15 ° and 25 °, more preferably 20 °. The second acute angle 101 helps to direct the hot air towards the circumferential side wall 12, reducing airflow resistance.
As also shown in fig. 1 and 5, the guide fins 204 are configured like a wedge that includes a sloped surface 51 and a straight surface 55. In the mounted state, the inclined surface 51 faces the first side wall 1, and the small end 52 of the guide fin 204 faces the circumferential side wall 12, and the large end 53 faces the inside of the case 11. The inclined surface 51 and the straight surface 55 form a first acute angle 54. Preferably, the first acute angle 54 is between 15 ° and 25 °, more preferably 20 °. In this way, the distance L between the guide fins 204 and the first side wall 1 is gradually reduced in a direction away from the circumferential side wall 12, which helps the branch flow 33 to tumble up along the inclined surface 51 to form a small circulation flow 31. The same is true for the space between adjacent guide fins 204, which is not described in detail here. If the angle of the first acute angle 54 is too large, the small circulating current 31 is prevented from being formed, and therefore it is not preferable to configure the angle of the first acute angle 54 to be larger than 25 °. When the angle of the first acute angle 54 is less than 15 °, the branch flow 33 is not promoted to tumble, and the small circulation flow 31 is not formed.
Furthermore, as also shown in fig. 5, the rear wall 13 is mainly used to push the downstream small circulation of hot air towards the experimental sample 100, so that it is not necessary to provide guide fins 204 on the rear wall 13.
It is also preferred that the gaps 16 between the plurality of guide fins 204 and the respective circumferential side wall 12 gradually decrease in a direction axially away from the first side wall 1. As the hot air stream flows along the walls of the box 11, the upstream guide fins 204 continually intercept the hot air stream, resulting in less hot air stream reaching the downstream. Therefore, positioning the downstream guide fins 204 closer to the circumferential side wall 12 helps the multiple small annular flows formed to be identical in terms of flow rate, air pressure, etc., thereby improving the heating uniformity of the experimental sample 100.
Preferably, a support frame 17 for supporting the test sample 100 is further provided in the case 11, and the height of the support frame 17 is greater than the height of the guide fin 204. Thus, each face of the test sample 100 is not in contact with the inner wall of the case 11 (i.e., is in a substantially suspended state), so that the plurality of small loops of hot air can equally and uniformly heat each portion of the test sample 100, which is helpful for obtaining more accurate TMRadAnd (4) data.
In the present application, the directional terms "upstream" and "downstream" are used with reference to the flow direction of the hot air.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (11)
1.TMRadThe constant temperature box of the tester comprises a box body for accommodating an experimental sample, an air inlet flow channel and an air outlet flow channel are arranged in the box body, an inlet of the air inlet flow channel and an outlet of the air outlet flow channel are both formed on a first side wall,
a plurality of guide fins arranged in parallel, the guide fins being spaced apart in an axial direction and being installed on opposite circumferential side walls of the box body through support rods, respectively, to extend toward an inside of the box body, wherein a gap is formed between each guide fin and the opposite circumferential side walls of the box body, and
the guide fins are all constructed to comprise an inclined surface facing the first side wall and a wedge body facing the straight surface opposite to the inclined surface, the small end of the wedge body faces the circumferential side wall of the box body, and the large end of the wedge body faces the inside of the box body.
2. Oven according to claim 1, characterized in that the guide fins are each parallel to the first side wall.
3. Incubator according to claim 2, characterised in that the inclined plane forms a first acute angle with the straight plane, said first acute angle being comprised between 15 ° and 25 °.
4. Incubator according to claim 3, characterised in that said first acute angle is 20 °.
5. Incubator according to any one of claims 1 to 4, characterised in that the gaps between the plurality of guide fins and the respective circumferential side wall are progressively reduced in a direction axially away from the first side wall.
6. Incubator according to any one of claims 1 to 4, wherein the inlet flow path and the outlet flow path are spaced apart by a bent guide member comprising a cylindrical portion connected to the first side wall and a guide plate connected to the cylindrical portion and parallel to the first side wall,
the inlet flow passage is formed between the guide plate and the first side wall, the cylindrical portion forms the outlet flow passage, and the plurality of guide fins are located downstream of the guide plate.
7. Oven according to claim 6, characterized in that the end of the guide plate is configured as a bevel facing the inlet air flow channel, the bevel being at a second acute angle to the outer surface of the guide plate.
8. Incubator according to claim 7, characterised in that said second acute angle is between 15 ° and 25 °.
9. Oven according to claim 8, characterized in that the second acute angle is 20 °.
10. Incubator according to any one of claims 1 to 4, wherein a support frame for supporting the test sample is further provided in the case, and the height of the support frame is greater than the height of the guide fin.
11. Incubator according to any one of claims 1 to 4, wherein the cabinet is rectangular parallelepiped-shaped, no guide fins are provided on the first side wall and the rear wall opposite to the first side wall, and the plurality of guide fins are provided on the remaining side walls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611168580.0A CN108201902B (en) | 2016-12-16 | 2016-12-16 | TMRadConstant temperature box of tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611168580.0A CN108201902B (en) | 2016-12-16 | 2016-12-16 | TMRadConstant temperature box of tester |
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| CN108201902A CN108201902A (en) | 2018-06-26 |
| CN108201902B true CN108201902B (en) | 2020-06-26 |
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| CN201611168580.0A Active CN108201902B (en) | 2016-12-16 | 2016-12-16 | TMRadConstant temperature box of tester |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456287A (en) * | 2019-08-05 | 2019-11-15 | 厦门多彩光电子科技有限公司 | A kind of thermostat |
| CN111486742B (en) * | 2020-04-23 | 2021-04-09 | 中国空气动力研究与发展中心高速空气动力研究所 | Natural convection enhanced heat exchange structure based on semi-closed flow channel |
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| CN204170745U (en) * | 2014-10-16 | 2015-02-25 | 广西师范大学 | A kind of air bath thermostat |
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| CN205042489U (en) * | 2015-08-31 | 2016-02-24 | 广州市汉迪环境试验设备有限公司 | Calm constant temperature test case |
| CN105413763A (en) * | 2015-12-06 | 2016-03-23 | 重庆阿泰可试验设备有限公司 | High temperature high humidity constant temperature constant humidity test box |
| CN205435766U (en) * | 2016-02-24 | 2016-08-10 | 东莞市剑乔试验设备有限公司 | Air duct structure for constant temperature and constant humidity test box |
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2016
- 2016-12-16 CN CN201611168580.0A patent/CN108201902B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR920000701B1 (en) * | 1989-03-27 | 1992-01-20 | 박순홍 | Usual humiditor |
| JP2009216357A (en) * | 2008-03-12 | 2009-09-24 | Nagano Science Kk | Temperature controlled bath |
| CN104152663A (en) * | 2014-07-18 | 2014-11-19 | 新疆金风科技股份有限公司 | Heating furnace of annular component |
| CN204122133U (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 temperature test chamber by heating liquid and constant temperature |
| CN204170745U (en) * | 2014-10-16 | 2015-02-25 | 广西师范大学 | A kind of air bath thermostat |
| CN204365328U (en) * | 2014-12-29 | 2015-06-03 | 广州威锘浦环境试验设备有限公司 | Calm simulated environmental test device |
| CN205042489U (en) * | 2015-08-31 | 2016-02-24 | 广州市汉迪环境试验设备有限公司 | Calm constant temperature test case |
| CN105413763A (en) * | 2015-12-06 | 2016-03-23 | 重庆阿泰可试验设备有限公司 | High temperature high humidity constant temperature constant humidity test box |
| CN205435766U (en) * | 2016-02-24 | 2016-08-10 | 东莞市剑乔试验设备有限公司 | Air duct structure for constant temperature and constant humidity test box |
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| CN108201902A (en) | 2018-06-26 |
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