CN219996842U - Accelerated aging test device - Google Patents
Accelerated aging test device Download PDFInfo
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- CN219996842U CN219996842U CN202321022776.4U CN202321022776U CN219996842U CN 219996842 U CN219996842 U CN 219996842U CN 202321022776 U CN202321022776 U CN 202321022776U CN 219996842 U CN219996842 U CN 219996842U
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- oxygen
- chamber
- air inlet
- accelerated aging
- valve core
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- 230000032683 aging Effects 0.000 title claims abstract description 95
- 238000012360 testing method Methods 0.000 title claims abstract description 63
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 98
- 239000001301 oxygen Substances 0.000 claims abstract description 98
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 98
- 239000007789 gas Substances 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000005192 partition Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000009423 ventilation Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000005286 illumination Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- UHZZMRAGKVHANO-UHFFFAOYSA-M chlormequat chloride Chemical compound [Cl-].C[N+](C)(C)CCCl UHZZMRAGKVHANO-UHFFFAOYSA-M 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The utility model relates to the technical field of ageing tests and discloses an accelerated ageing test device which comprises a test box, an oxygen supply assembly, an air supply assembly, an oxygen concentration sensor and a controller, wherein in the test process, when the oxygen content of an ageing chamber is not in accordance with the requirements, mixed gas of oxygen and air can be supplied to the ageing chamber.
Description
Technical Field
The utility model relates to the technical field of ageing tests, in particular to an accelerated ageing test device.
Background
Accelerated aging test devices are used to test the accelerated aging characteristics of painted surfaces, fabrics, plastic films and other materials by simulating a near-atmospheric environment at a controlled temperature and humidity to observe the changes that occur. In the process of the accelerated aging test, parameters such as oxygen content and the like are required to be kept stable, so that the influence of the change of the test environment on the aging test is reduced.
The existing accelerated aging test device generally needs to use a mode of mixing nitrogen and oxygen to maintain the oxygen content, and the test cost is high.
Disclosure of Invention
The utility model aims to provide an accelerated aging test device with low cost and accurate oxygen content control.
In order to achieve the above object, the present utility model provides an accelerated aging test apparatus comprising:
a test chamber defining an aging chamber;
the oxygen supply assembly comprises an oxygen pipe, an oxygen bottle, a pressure reducing valve and an oxygen flowmeter, wherein the pressure reducing valve and the oxygen flowmeter are arranged on the oxygen pipe, and the oxygen bottle is communicated with the aging chamber through the oxygen pipe;
an air supply assembly including an intake passage, an intake valve, and a first driving device;
the air inlet channel is provided with an air inlet;
the air inlet valve comprises a valve body and a valve core arranged in the valve body, the valve core is provided with a first end and a second end which are oppositely arranged, the first end of the valve core is arranged close to the air inlet, and the cross section area of the valve core along a plane parallel to the air inlet is gradually reduced from the second end to the first end;
the first driving device is used for driving the valve core to move towards or away from the air inlet so as to change the air inlet area of the air inlet;
the oxygen concentration sensor is arranged in the aging chamber and is used for detecting the oxygen content in the aging chamber;
and the controller is electrically connected with the oxygen flow meter, the first driving device and the oxygen concentration sensor.
In some embodiments of the present utility model, the first driving device includes a motor, a driving gear, a transmission gear and a screw rod, the motor is in transmission connection with the driving gear, the driving gear is in meshed connection with the transmission gear, the screw rod is rotatably disposed in the valve body, the screw rod is perpendicular to a plane of the air inlet, the transmission gear is in rotational connection with the screw rod, a ball is disposed in the valve core, and the valve core is configured to approach or depart from the air inlet along an axial direction of the screw rod through the ball;
wherein, the motor is connected with the controller electricity.
In some embodiments of the utility model, two limit rods are symmetrically arranged on the outer peripheral wall of the valve core, limit grooves corresponding to the limit rods are formed in the inner walls of the valve body on two sides of the valve core, the limit grooves extend in a direction parallel to the screw rod, and the limit rods slidably extend into the limit grooves.
In some embodiments of the utility model, the air inlet is circular and the valve core is at least partially or entirely conical.
In some embodiments of the utility model, a ventilator in communication with the aging chamber is further included, the ventilator configured to extract gas within the aging chamber, the ventilator in electrical communication with the controller.
In some embodiments of the utility model, a partition plate is arranged in the aging chamber, the partition plate divides a cavity in the aging chamber into a mixing cavity and a reaction cavity, and the partition plate is provided with an air inlet hole communicated with the mixing cavity and the reaction cavity;
the oxygen pipe and the air inlet channel are communicated with the mixing cavity.
In some embodiments of the present utility model, the air inlet holes are provided in a plurality, and the plurality of air holes are uniformly distributed on the partition board in a matrix.
In some embodiments of the utility model, a blower is disposed within the mixing chamber, the blower configured to direct air within the intake passage and oxygen within the oxygen tube into the mixing chamber.
In some embodiments of the present utility model, the aging chamber is provided with a sample holder, and the accelerated aging test device further comprises a plurality of ultraviolet lamps, wherein the plurality of ultraviolet lamps are uniformly distributed along the periphery of the sample holder.
In some embodiments of the present utility model, a plurality of mounting seats are provided in the aging chamber, the plurality of mounting seats are uniformly distributed along the outer circumference of the sample holder, and the ultraviolet lamp is detachably provided on the mounting seats.
In some embodiments of the present utility model, the sample holder is rotatably disposed in the aging chamber through a rotating shaft, and the accelerated aging test apparatus further includes a second driving device, which is in driving connection with the rotating shaft, and is used for driving the rotating shaft to rotate.
The utility model provides an accelerated aging test device, which has the beneficial effects that compared with the prior art:
the accelerated aging test device provided by the utility model comprises a test box, an oxygen supply assembly, an air supply assembly, an oxygen concentration sensor and a controller, wherein when the oxygen content of the aging chamber is not in accordance with the requirement in the test process, mixed gas of oxygen and air is supplied to the aging chamber, the accelerated aging test device can maintain constant oxygen supply, the valve core position of the air inlet valve is regulated through the oxygen content of the aging chamber detected by the oxygen concentration sensor, so that the air inlet is opened to a certain air inlet area or closed, the air inflow of the air is regulated in real time according to the oxygen concentration requirement, the oxygen content in the aging chamber is accurately maintained in the test requirement range, the accelerated aging test is not required by using nitrogen, the cost is lower, and the control of the oxygen content is more accurate.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an accelerated aging test apparatus according to an embodiment of the present utility model;
FIG. 2 is a schematic view showing a partial structure of an air supply assembly of an accelerated aging test apparatus according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of an intake valve according to an embodiment of the present utility model;
FIG. 4 is a circuit control diagram of an accelerated aging test apparatus according to an embodiment of the present utility model.
In the figure: 1. a test chamber; 11. an aging chamber; 111. a mixing chamber; 112. a reaction chamber; 12. a partition plate; 121. an air inlet hole; 13. a blower; 14. a sample holder; 2. an oxygen supply assembly; 21. an oxygen pipe; 22. an oxygen cylinder; 23. an oxygen flow meter; 3. an air supply assembly; 31. an air intake passage; 311. an air inlet; 32. an intake valve; 321. a valve body; 322. a valve core; 33. a first driving device; 331. a motor; 332. a drive gear; 333. a transmission gear; 334. a screw rod; 335. a limit rod; 336. a limit groove; 4. an oxygen concentration sensor; 5. a controller; 6. a ventilation device; 7. an ultraviolet lamp; 8. and a second driving device.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model.
It is to be understood that in the description of the present utility model, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, i.e., features defining "first," "second," may explicitly or implicitly include one or more such features. Furthermore, unless otherwise indicated, the meaning of "a plurality" is two or more.
It should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 to 4, an embodiment of the present utility model provides an accelerated aging test apparatus including a test chamber 1, a ventilator 6, an oxygen supply assembly 2, an air supply assembly 3, an oxygen concentration sensor 4, and a controller 5.
The test chamber 1 defines an aging chamber 11, a sample holder 14 is disposed in the aging chamber 11 for holding a sample, and the accelerated aging test device further includes a plurality of ultraviolet lamps 7, wherein the plurality of ultraviolet lamps 7 are uniformly distributed along the periphery of the sample holder 14. The ultraviolet lamp 7 can be in various types such as UVA-340, UVA-351, UVB-313 and the like so as to meet the test of various illumination conditions. The wavelength range of the UVA-340 ultraviolet lamp 7 is 320nm-400nm, the wavelength range of the UVA-351 ultraviolet lamp 7 is 320nm-400nm, and the wavelength range of the UVA-313 ultraviolet lamp 7 is 280nm-320nm.
The ventilator 6 communicates with the aging chamber 11, and the ventilator 6 is configured to draw the gas in the aging chamber 11 to form a negative pressure. Specifically, the ventilation device 6 is an air pump or a vacuum pump for sucking the exhaust gas in the aging chamber 11 to the outside or a recovery system.
The oxygen supply assembly 2 comprises an oxygen pipe 21, an oxygen bottle 22, a pressure reducing valve and an oxygen flow meter 23, wherein the pressure reducing valve and the oxygen flow meter 23 are arranged on the oxygen pipe 21, and the oxygen bottle 22 is communicated with the aging chamber 11 through the oxygen pipe 21.
The air supply assembly 3 includes an intake passage 31, an intake valve 32, and a first driving device 33. The intake passage 31 is provided with an intake port 311, and the intake port 311 may be circular or square.
As shown in fig. 2 and 3, the intake valve 32 includes a valve body 321 and a valve spool 322 provided in the valve body 321, the valve body 321 having a first end and a second end that are disposed opposite to each other, the first end of the valve spool 322 being disposed near the intake port 311, the valve spool 322 gradually decreasing in cross-sectional area from the second end thereof to the first end thereof along a plane parallel to the intake port 311. Specifically, the cross-sectional shape of the valve body 322 corresponds to the shape of the intake port 311, which is partially or entirely conical or tower-shaped. Preferably, the valve core 322 adopts a conical shape, so that on one hand, the air inlet area of the air inlet 311 can be flexibly changed, and on the other hand, the conical outer circumferential surface of the valve core 322 can play a role in guiding, so that air can smoothly flow to the air inlet 311.
The first driving device 33 is used to drive the valve spool 322 to move toward or away from the intake port 311 to change the intake area of the intake port 311. Specifically, the first driving device 33 includes a motor 331, a driving gear 332, a transmission gear 333, and a screw rod 334, the motor 331 is in transmission connection with the driving gear 332, the driving gear 332 is in meshed connection with the transmission gear 333, the screw rod 334 is rotatably disposed in the valve body 321, the screw rod 334 is perpendicular to a plane of the air inlet 311, the transmission gear 333 is rotatably connected with the screw rod 334, a ball is disposed in the valve core 322, the valve core 322 is configured to approach or separate from the air inlet 311 along an axial direction of the screw rod 334 through the ball, and when the valve core 322 moves for a certain distance along a direction toward the air inlet 311, the valve core 322 blocks the air inlet 311, thereby closing the air inlet 311; when the valve element 322 moves a certain distance in a direction away from the intake port 311, the valve element 322 completely withdraws from the intake port 311, thereby completely opening the intake port 311. Of course, the first driving device 33 may be provided in other forms such as a worm gear.
The oxygen concentration sensor 4 is provided in the aging chamber 11 for detecting the oxygen content in the aging chamber 11. The controller 5 is electrically connected with the ventilator 6, the oxygen flow meter 23, the motor 331 and the oxygen concentration sensor 4.
Based on the above structure, in the test process, when the oxygen content of the aging chamber 11 does not meet the requirement, the exhaust gas can be discharged through the air extraction device, the aging chamber 11 is made to form a negative pressure or vacuum environment, and then the mixed gas of oxygen and air is supplied to the aging chamber 11, of course, the air extraction device is not required to be arranged, the mixed gas of oxygen and air is directly supplied, the original gas which does not meet the requirement is naturally discharged due to positive pressure, the accelerated aging test device can keep the constant oxygen supply, the position of the valve core 322 of the air inlet valve 32 is regulated through the oxygen content of the aging chamber 11 detected by the oxygen concentration sensor 4, so that the air inlet 311 is opened to a certain air inlet area or closed, the air inlet amount of air is regulated in real time according to the oxygen concentration requirement, the oxygen content in the aging chamber 11 is accurately kept in the test requirement range, the accelerated aging test is not required to be performed by using nitrogen, the cost is lower, and the control of the oxygen content is more accurate; and secondly, the multi-factor comprehensive aging test of oxygen and illumination can be carried out, and the test result is more accurate.
Optionally, as shown in fig. 1, in this embodiment, two limiting rods 335 are symmetrically disposed on the outer peripheral wall of the valve core 322, limiting grooves 336 corresponding to the limiting rods 335 are disposed on inner walls of the valve body 321 on two sides of the valve core 322, the limiting grooves 336 extend in a direction parallel to the screw rod 334, and the limiting rods 335 slidably extend into the limiting grooves 336. Based on this, the stop lever 335 can support the valve core 322, preventing the axial center of the valve core 322 from being shifted.
Alternatively, as shown in fig. 1, in the present embodiment, a partition plate 12 is provided in the aging chamber 11, the partition plate 12 dividing the cavity in the aging chamber 11 into a mixing chamber 111 and a reaction chamber 112, the partition plate 12 being provided with an air intake hole 121 communicating the mixing chamber 111 and the reaction chamber 112; both the oxygen pipe 21 and the intake passage 31 communicate with the mixing chamber 111. In this way, the mixing chamber 111 functions to pre-mix oxygen and air.
Alternatively, as shown in fig. 1, in the present embodiment, the air intake holes 121 are provided in a plurality, and the plurality of air holes are uniformly distributed on the partition 12 in a matrix. In this manner, the mixed gases are more uniformly introduced into the reaction chamber 112.
Alternatively, as shown in fig. 1, in the present embodiment, a blower 13 is provided in the mixing chamber 111, and the blower 13 is configured to guide air in the intake passage 31 and oxygen in the oxygen pipe 21 into the mixing chamber 111. In this way, the fan 13 further provides suction for the air flow on the one hand and plays a role in turbulence on the other hand, so that the mixture of oxygen and air is more uniform.
Alternatively, as shown in fig. 1, in the present embodiment, a plurality of mounting seats are provided in the aging chamber 11, the plurality of mounting seats being uniformly distributed along the outer circumference of the sample holder 14, and the ultraviolet lamp 7 being detachably provided on the mounting seats. In this way, different models of ultraviolet lamps 7 can be selected and replaced as desired. Specifically, the mounting seat can be provided with a slot, and ultraviolet rays are inserted on the mounting seat.
Optionally, as shown in fig. 1, in this embodiment, the sample holder 14 is rotatably disposed in the aging chamber 11 through a rotating shaft, and the accelerated aging test device further includes a second driving device 8, where the second driving device 8 is in transmission connection with the rotating shaft, and is used for driving the rotating shaft to rotate. Based on this, the second driving device 8 can drive the sample holder 14 to rotate, so that the ultraviolet light received by the sample is more uniform.
In this embodiment, the controller 5 is electrically connected to the ventilator 6, the oxygen flow meter 23, the first driving device 33, the oxygen concentration sensor 4, the second driving device 8, the blower 13, and the ultraviolet lamp 7, and its control logic is as follows:
(1) And (3) illumination control: the controller 5 sets irradiance of the ultraviolet lamp 7 to adjust different illumination intensities, and controls the rotation of the sample holder 14 through the second driving device 8;
(2) Oxygen content control: detecting real-time oxygen concentration Cs by the oxygen concentration sensor 4 and comparing with target oxygen concentration C, if Cs > C, driving the spool 322 to move forward by the first driving means 33, and decreasing the opening of the intake valve 32; if Cs < C, the valve spool 322 is driven to move backward by the first driving device 33, the opening degree of the intake valve 32 increases.
In summary, the embodiment of the utility model provides an accelerated aging test device, which mainly comprises a test chamber 1, a ventilation device 6, an oxygen supply assembly 2, an air supply assembly 3, an oxygen concentration sensor 4 and a controller 5. Compared with the prior art, the accelerated aging test device has the following advantages:
1. in the test process, when the oxygen content of the aging chamber is not in accordance with the requirement, the mixed gas of oxygen and air can be supplied to the aging chamber, the accelerated aging test device can keep the constant oxygen supply, the oxygen content of the aging chamber detected by the oxygen concentration sensor is used for adjusting the valve core position of the air inlet valve, so that the air inlet is opened to a certain air inlet area or closed, the air inflow of the air is adjusted in real time according to the oxygen concentration requirement, the oxygen content in the aging chamber is accurately kept in the test requirement range, the accelerated aging test is not required to be performed by using nitrogen, the cost is lower, and the control of the oxygen content is more accurate.
2. The valve core adopts the taper shape, so that the air inlet area of the air inlet can be flexibly changed, and the taper peripheral surface of the valve core can play a role in guiding, so that air can smoothly flow to the air inlet.
3. The limiting rod can play a supporting role on the valve core, and the axial center of the valve core is prevented from being deviated.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (10)
1. An accelerated aging test apparatus, comprising:
a test chamber defining an aging chamber;
the oxygen supply assembly comprises an oxygen pipe, an oxygen bottle, a pressure reducing valve and an oxygen flowmeter, wherein the pressure reducing valve and the oxygen flowmeter are arranged on the oxygen pipe, and the oxygen bottle is communicated with the aging chamber through the oxygen pipe;
an air supply assembly including an intake passage, an intake valve, and a first driving device;
the air inlet channel is provided with an air inlet;
the air inlet valve comprises a valve body and a valve core arranged in the valve body, the valve core is provided with a first end and a second end which are oppositely arranged, the first end of the valve core is arranged close to the air inlet, and the cross section area of the valve core along a plane parallel to the air inlet is gradually reduced from the second end to the first end;
the first driving device is used for driving the valve core to move towards or away from the air inlet so as to change the air inlet area of the air inlet;
the oxygen concentration sensor is arranged in the aging chamber and is used for detecting the oxygen content in the aging chamber;
and the controller is electrically connected with the oxygen flow meter, the first driving device and the oxygen concentration sensor.
2. The accelerated aging test apparatus of claim 1, wherein:
the first driving device comprises a motor, a driving gear, a transmission gear and a screw rod, wherein the motor is in transmission connection with the driving gear, the driving gear is in meshed connection with the transmission gear, the screw rod is rotatably arranged in the valve body and is perpendicular to the plane of the air inlet, the transmission gear is in rotational connection with the screw rod, a ball is arranged in the valve core, and the valve core is configured to be close to or far away from the air inlet along the axial direction of the screw rod through the ball;
wherein, the motor is connected with the controller electricity.
3. The accelerated aging test apparatus of claim 2, wherein:
two limit rods are symmetrically arranged on the peripheral wall of the valve core, limit grooves corresponding to the limit rods are arranged on the inner walls of the valve body on two sides of the valve core, the limiting groove extends along the direction parallel to the screw rod, and the limiting rod slidably stretches into the limiting groove.
4. The accelerated aging test apparatus of claim 1, wherein:
and a ventilation device in communication with the aging chamber, the ventilation device configured to extract gas within the aging chamber, the ventilation device in electrical communication with the controller.
5. The accelerated aging test apparatus of claim 1, wherein:
the device comprises an aging chamber, a reaction chamber and a mixing chamber, wherein a baffle is arranged in the aging chamber, the baffle divides a cavity in the aging chamber into the mixing chamber and the reaction chamber, and an air inlet hole which is communicated with the mixing chamber and the reaction chamber is formed in the baffle;
the oxygen pipe and the air inlet channel are communicated with the mixing cavity.
6. The accelerated aging test apparatus of claim 5, wherein:
the air inlets are arranged in a plurality, and the air holes are uniformly distributed on the partition plate in a matrix.
7. The accelerated aging test apparatus of claim 5, wherein:
a blower is disposed within the mixing chamber and is configured to direct air within the intake passage and oxygen within the oxygen tube into the mixing chamber.
8. The accelerated aging test apparatus of claim 1, wherein:
the aging chamber is provided with the sample frame, the accelerated aging test device also comprises a plurality of ultraviolet lamps, and a plurality of ultraviolet lamps are uniformly distributed along the periphery of the sample frame.
9. The accelerated aging test apparatus of claim 8, wherein:
a plurality of mounting seats are arranged in the aging chamber, the mounting seats are uniformly distributed along the periphery of the sample rack, and the ultraviolet lamp is detachably arranged on the mounting seats.
10. The accelerated aging test apparatus of claim 8, wherein:
the sample rack is rotatably arranged in the aging chamber through a rotating shaft, the accelerated aging test device further comprises a second driving device, and the second driving device is in transmission connection with the rotating shaft and is used for driving the rotating shaft to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321022776.4U CN219996842U (en) | 2023-04-28 | 2023-04-28 | Accelerated aging test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321022776.4U CN219996842U (en) | 2023-04-28 | 2023-04-28 | Accelerated aging test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219996842U true CN219996842U (en) | 2023-11-10 |
Family
ID=88607497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321022776.4U Active CN219996842U (en) | 2023-04-28 | 2023-04-28 | Accelerated aging test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219996842U (en) |
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2023
- 2023-04-28 CN CN202321022776.4U patent/CN219996842U/en active Active
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