Hydrogen detection device
By setting up a filter and a fan in the air inlet channel of the hydrogen detection device, the problem of reducing detection accuracy caused by alkali crystal entering the device is solved, and accurate detection of hydrogen is achieved.
Patent Information
- Application Number
- CN202421568828.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-04
AI Technical Summary
During the process of solar cell processing, alkali crystals enter the hydrogen detection device through the exhaust duct, resulting in device damage and detection accuracy decrease.
A hydrogen detection device is designed, including a device housing, a detector and a fan. By setting up a filter and a fan in the air inlet passage, the filter prevents alkali crystal from entering, and the fan blows the alkali crystal attached to the filter to the outside to avoid blocking the air inlet passage.
It effectively avoids damage to the hydrogen detection device by alkali crystallization, ensures that hydrogen can enter the detector accurately, and improves the accuracy of hydrogen detection.
Smart Images
Figure CN222913608U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of solar cells, in particular to a hydrogen detection device. Background Art
[0002] Hydrogen is produced during the processing of solar cells. If the hydrogen concentration exceeds a certain range, it will bring great safety hazards, so it is necessary to monitor the hydrogen concentration in real time. However, a large amount of alkaline chemicals are used in the cleaning process, which will produce alkali crystals. The alkali crystals are attached to the hydrogen detection device through the exhaust pipe. While corroding the hydrogen detection device, it will also affect the entry of hydrogen into the detector, thereby affecting the accuracy of the detection or even making it impossible to detect. Utility Model Content
[0003] The purpose of the embodiments of the present application is to provide a hydrogen detection device, which can avoid the influence of alkali crystallization on hydrogen detection and improve the accuracy of hydrogen detection.
[0004] In order to achieve the above objectives, this application provides the following technical solutions:
[0005] The present application embodiment discloses a hydrogen detection device, which is used to detect the concentration of hydrogen generated during the processing of solar cells. The hydrogen detection device includes:
[0006] A device housing, the device housing having an air inlet channel for allowing hydrogen to pass through, the air inlet channel being provided with a filter screen, the filter screen enabling the air inlet channel to have an inner side and an outer side, the outer side being a side connected to the external environment;
[0007] A detector, the detector being disposed in the housing of the device, the detector being used to detect the hydrogen entering through the air inlet channel;
[0008] A fan is provided in the air inlet passage and is used to blow the attachments remaining on the filter to the outside.
[0009] The cleaning process of solar cells uses a large amount of alkaline compounds, which produce alkali crystals. The alkali crystals enter the hydrogen detection device through the exhaust pipe, which can easily damage the hydrogen detection device. By setting a filter on the hydrogen detection device, most alkali crystals can be prevented from entering the hydrogen detection device. By setting a fan, the alkali crystals attached to the filter can be blown to the outside to prevent the alkali crystals attached to the filter from blocking the air inlet channel, thereby improving the accuracy of the detection.
[0010] Furthermore, the fan can rotate forward and reverse. When the fan rotates forward, the fan allows the hydrogen in the external environment to enter the inner side. When the fan rotates reversely, the fan blows the attachments remaining on the filter to the outer side.
[0011] By setting the fan to rotate forward, the hydrogen can enter the detector faster, avoiding low detection values caused by too low concentration of hydrogen diffused into the detector.
[0012] Furthermore, along the axial direction of the air inlet channel, the fan and the air inlet channel are slidably connected.
[0013] In some embodiments, at least one guide rail is formed in the air inlet channel, and the guide rail extends axially along the air inlet channel; a bracket is fixed on the fan, and at least one end of the bracket is slidably connected to the guide rail.
[0014] The bracket drives the fan to slide on the guide rail set in the air inlet channel. Under the condition of constant wind speed, the relative position of the fan and the filter can be controlled to adjust the fan's blowing force on the attachments on the filter and the force of driving hydrogen into the detector.
[0015] Furthermore, a locking assembly is provided on the bracket, and the locking assembly is used to fix the fan to the guide rail.
[0016] Furthermore, the locking assembly includes a retractable supporting foot, which can be extended or retracted relative to the bracket. When the retractable supporting foot is in the extended state, the fan and the guide rail are relatively locked. When the retractable supporting foot is in the retracted state, the fan and the guide rail can slide relative to each other.
[0017] Furthermore, a driving device is provided on the bracket, and the driving device is used to drive the fan to rotate; and,
[0018] The driving device drives the fan to slide in the air inlet channel; and
[0019] The driving device drives the locking assembly to lock and unlock.
[0020] Furthermore, the fan includes blades, and a cleaning member is connected to the blades of the fan, and the cleaning member can clean the attachments on the filter when the blades rotate; and / or clean the attachments on the inner wall of the device housing.
[0021] Furthermore, the cleaning member is a brush, which includes a brush handle and bristles arranged on the brush handle, the brush handle is fixedly connected to the edge of the fan blades, and the bristles abut against the filter and / or the inner wall of the device housing.
[0022] Further, the bristles contact the air inlet passage; and / or,
[0023] When the fan is located at the intermediate position along the axis of the air inlet passage, the bristles contact the filter screen.
[0024] The cleaning member cleans the attached substances under the drive of the fan. As the fan slides on the guide rail, the cleaning member can clean the attached substances at different positions.
[0025] Compared with the prior art, the beneficial effects of the embodiments of the present application are as follows:
[0026] In the present application, a fan is provided in the air inlet passage of the hydrogen detection device. By adjusting the operation of the fan, the alkali crystals attached to the filter screen of the hydrogen detection device can be blown away, avoiding the blockage of the air inlet passage by the alkali crystals, resulting in low detection values or even inability to detect, and improving the accuracy of hydrogen detection. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0028] Figure 1 is a schematic diagram of the hydrogen detection device provided by the embodiment of the present application from the first perspective;
[0029] Figure 2 is a schematic structural diagram of the hydrogen detection device (the filter screen is not shown) provided by the embodiment of the present application;
[0030] Figure 3 is Figure 2 an enlarged view of part A in
[0031] Figure 4 is a schematic diagram of the hydrogen detection device (the filter screen is not shown) provided by the embodiment of the present application from the first perspective.
[0032] Figure 5 is a schematic diagram of the hydrogen detection device (the filter screen is not shown) provided by the embodiment of the present application from the second perspective. BRIEF DESCRIPTION OF THE DRAWINGS:
[0034] 1 - Hydrogen detection device; 11 - Device housing; 111 - Air inlet passage; 112 - Guide rail; 12 - Filter screen; 13 - Fan; 131 - Fan blade; 14 - Bracket; 141 - Locking assembly; 1411 - Fixed part; 1412, Extended part; 15 - Driving device; 16 - Cleaning member. Detailed implementation manners
[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part rather than all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.
[0036] In the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.
[0037] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances.
[0038] In addition, the terms "mounted", "arranged", "provided with", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral structure; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, or there may be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0039] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "a plurality" is two or more.
[0040] The technical solutions provided by the present application will be further described below in conjunction with the embodiments and the accompanying drawings.
[0041] Hydrogen is produced during the processing of solar cells. Hydrogen is a flammable and explosive gas. If the concentration exceeds its explosion limit, it is easy to explode when encountering open flames or high temperatures, which poses a great safety hazard. Therefore, it is necessary to detect the hydrogen concentration in real time. In actual production, the hydrogen detection device is generally set in the exhaust duct. The cleaning process of solar cells is carried out in a slot machine, which uses a large amount of alkaline compounds. The slot machine is connected to the exhaust duct. A large amount of alkaline compounds will produce alkali crystals, which enter the hydrogen detection device through the exhaust duct and easily damage the hydrogen detection device, especially the detector. By setting a filter 12 on the hydrogen detection device, most of the alkali crystals can be prevented from entering the hydrogen detection device 1. However, the alkali crystals and other impurities attached to the filter 12 will block the air inlet channel 111 of the hydrogen detection device 1, and it is difficult for hydrogen to enter the detector of the hydrogen detection device 1 through the air inlet channel 111, resulting in the measured hydrogen concentration value being low or even undetectable.
[0042] To solve this problem, Figure 1 As shown, in an embodiment of the present application, a hydrogen detection device 1 for detecting the concentration of hydrogen generated during the processing of solar cells is provided, comprising: a device housing 11, the device housing 11 having an air inlet channel 111 for allowing hydrogen to pass through, the air inlet channel 111 being provided with a filter 12, the filter 12 dividing the air inlet channel 111 into an outer side connected to the external environment and a relative inner side; a detector, the detector being arranged in the device housing 11, and being used for detecting the hydrogen entering through the air inlet channel 111; a fan 13, the fan 13 being arranged in the air inlet channel 111, and being used for blowing attachments remaining on the filter 12 to the outside.
[0043] In the embodiment of the present application, by setting a fan 13 in the air inlet channel 111, the attachments attached to the filter 12 are blown to the outside, thereby preventing the attachments from blocking the air inlet channel 111 and affecting the accuracy of hydrogen detection. The fan 13 can be set on the outside of the filter 12 or on the inside of the filter 12, and the purpose of blowing the attachments to the outside can be achieved by adjusting the wind direction of the fan 13.
[0044] In some embodiments, the fan 13 can rotate forward or reverse. By rotating forward, hydrogen in the external environment can enter the inside. It can be understood that hydrogen in the exhaust duct diffuses into the intake port channel 111 and then enters the detector for detection. During this process, affected by the gas diffusion rate and the position of the hydrogen detection device 1, the concentration of hydrogen entering the detector is often lower than the actual hydrogen concentration. By setting the fan 13 to rotate forward, the entry of hydrogen into the detector in the hydrogen detection device 1 can be accelerated, and the accuracy of hydrogen detection concentration can be improved. By rotating in reverse, the attachments on the filter screen 12 can be blown to the outside to prevent hydrogen detection from being blocked. Forward and reverse rotations can be interspersed, and the time, frequency, etc. of forward and reverse rotations can be set according to the actual situation. It should be noted that here, forward rotation means that this rotation can make the wind direction of the fan 13 the same as the direction of hydrogen entering the intake port channel 111, and reverse rotation means that this rotation can make the wind of the fan 13 face outward, rather than referring to the clockwise or counterclockwise rotation of the fan blades of the fan 13. The fan 13 in this application is not limited to a fan with fan blades, as long as it can generate a wind in the direction opposite to the direction of hydrogen entering the intake port channel 111, that is to say, a bladeless fan is also within the scope of this application.
[0045] Further, along the axial direction of the intake port channel 111, the fan 13 is slidably connected to the intake port channel 111. The fan 13 slides in the intake port channel 111, and the distance between the fan 13 and the filter screen 12 also changes accordingly. By adjusting this distance, without changing the wind speed of the fan 13 itself, the blowing force of the fan 13 on the attachments on the filter screen 12 and the force of the fan 13 driving hydrogen into the detector can be adjusted.
[0046] As an optional embodiment, at least one guide rail 112 is formed in the air inlet channel 111, and the guide rail 112 extends axially along the air inlet channel 111; a bracket 14 is fixed to the fan 13, and at least one end of the bracket 14 is slidably connected to the guide rail 112, so that the movement of the bracket 14 on the guide rail 112 can drive the fan 13 to slide on the guide rail 112. In the embodiment of the present application, the guide rail 112 can be one, or two or more. Exemplarily, two opposite guide rails 112 are set in the air inlet channel 111, and the bracket 14 of the fan 13 is axially arranged perpendicular to the air inlet channel 111, and the two ends of the bracket 14 are respectively slidably connected to the two guide rails 112, which is conducive to maintaining the stability of the fan 13 in the air inlet channel 111. For another example, two guide rails 112 in the same direction are arranged in the air inlet channel 111, the bracket 14 is V-shaped, the apex of the V is arranged at the center of the fan 13, and the two sides of the V are respectively slidably connected with the two guide rails 112. At this time, the center of the fan 13, the two points where the bracket 14 and the guide rail 112 contact form a triangle, and the sliding of the fan 13 in the air inlet channel 111 is more stable. As another optional embodiment, the fan 13 is fixed to two centrally symmetrical brackets 14, and a pulley is arranged at the position where the bracket 14 and the air inlet channel 111 contact, so that the fan 13 can slide in the air inlet channel 111.
[0047] Furthermore, a locking assembly 141 is provided on the bracket 14, and the locking assembly 141 is used to fix the fan 13 to the guide rail 112. As the bracket 14 drives the fan 13 to slide on the guide rail 112, the wind force felt by each position of the hydrogen detection device 1 is constantly changing. Under the condition of appropriate wind force, the fan 13 needs to be fixed at this position to achieve a stable detection effect. The appropriate wind force here can be the wind force that can blow the attachments attached to the filter 12 to the outside without blowing them back to the slot machine, and can be the wind speed that allows hydrogen to enter the detector evenly and stably without being too strong to affect the stability of the detector and thus cause errors in the detection results, and so on.
[0048] As an optional embodiment, the locking assembly 141 is a retractable support foot that can be extended or retracted relative to the bracket 14. When the retractable support foot is in an extended state, the fan 13 and the guide rail 112 are relatively locked, and when the retractable support foot is in a retracted state, the fan 13 and the guide rail 112 can slide relative to each other. Figures 2 to 5As shown in the figure, the telescopic support feet are fixed to the grooves. The telescopic support feet include a fixed part 1411 and a protruding part 1412. When the bracket 14 slides, the protruding part 1412 contracts towards the fixed part 1411. When the bracket 14 is fixed, the protruding part 1412 extends and contacts the guide rail 112. The telescopic support angles can be one or more, and there can be various connection methods with the bracket 14. For example, when both ends of the bracket 14 contact the air inlet channel 111, grooves are formed by the two ends of the bracket 14 close to the guide rail 112 sinking towards the inside of the bracket itself. The telescopic support angles are arranged in the grooves. One support foot can be arranged on each of the outer side and the inner side close to both ends of the bracket 14, that is to say, a total of four support feet are arranged. This setting method can make the bracket 14 more stable relative to the guide rail 112.
[0049] As another implementation manner, the locking component 141 includes a support rod with a fixed length arranged on one side of the bracket 14 close to the guide rail 112 and a plurality of telescopic limit bars arranged in the guide rail 112. One end of the support rod is fixed to the bracket 14, and the other end is a free end. When the fan 13 slides, the free end of the support rod approaches the guide rail 112 but does not contact the guide rail 112. When the fan 13 needs to be fixed, the telescopic limit bars in the guide rail 112 extend to fix the fan 13 at a specific position.
[0050] Furthermore, a driving device 15 is arranged on the bracket 14. The driving device 15 is used to control the rotation of the fan 13, as well as to control the relative sliding and relative locking between the fan 13 and the air inlet channel 111.
[0051] As an optional implementation manner, the driving device 15 is a micro servo motor. The servo motor has the characteristics of high-precision positioning, fast response, and high efficiency. High efficiency means that it can save energy to the greatest extent while meeting the control requirements. In addition, the servo motor also has programmability and high flexibility. In the embodiment of the present application, the micro servo motor is arranged on the bracket. The micro servo motor is electrically connected to the fan, the locking component arranged on the bracket, and the bracket itself. Under the action of the servo motor, the fan 13 slides on the guide rail 112 in the air inlet channel 111. After reaching the selected position, the servo motor controls the protruding part 1412 of the telescopic support foot to extend, and the fan 13 is fixed on the guide rail 112. At the same time, the servo motor can control the forward and reverse rotation of the fan 13 and can adjust the wind speed. In addition to the micro servo motor, the driving device 15 can also be an AC asynchronous motor, a linear motor, etc. The AC asynchronous motor has a simple structure and low cost, while the linear motor is suitable for occasions that require linear motion. The present application does not limit the specific driving device 15.
[0052] Furthermore, the fan 13 includes fan blades 131, and the fan blades 131 are connected to a cleaning member 16. The cleaning member 16 rotates under the action of the fan 13, thereby being able to clean the attachments on the filter 12; it is understandable that in addition to the attachments on the filter 12, there may also be attachments that pass through the filter 12 into the inner side of the air inlet channel 111 and then attach to the inner wall of the device housing 11, and the cleaning member 16 can also clean these attachments.
[0053] As an optional embodiment, the cleaning member 16 is a brush, which includes a brush handle and bristles arranged on the brush handle. The brush handle is fixedly connected to the edge of the fan blade 131 of the fan 13, and the brush handle has a side facing the filter 12 and a side facing the inner wall of the device housing 11. Bristles are arranged on the side of the brush handle facing the inner wall of the device housing 11, and the bristles abut against the inner wall of the device housing 11, so as to clean the air inlet channel 111; bristles are arranged on the side of the brush handle facing the filter 12, and the bristles abut against the filter 12, so as to clean the filter 12. The cleaning member 16 can also be a dust cloth, a sponge, etc., which is not limited in this application.
[0054] Furthermore, when the fan 13 is located at the middle position of the guide rail 112 along the axial direction of the air inlet channel 111, the bristles contact the filter 12, and then as the fan 13 slides in the air inlet channel 111, the bristles can extend out of the filter 12 or contact the inner side of the filter 12 to remove attachments on the inside and outside of the filter 12.
[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A hydrogen detection device, characterized in that: The hydrogen detection device is used to detect the concentration of hydrogen generated during the processing of solar cells, and the hydrogen detection device includes: A device housing, the device housing having an air inlet channel for allowing hydrogen to pass through, the air inlet channel being provided with a filter screen, the filter screen enabling the air inlet channel to have an inner side and an outer side, the outer side being a side connected to the external environment; A detector, the detector being disposed in the housing of the device, the detector being used to detect the hydrogen entering through the air inlet channel; A fan is provided in the air inlet passage and is used to blow the attachments remaining on the filter to the outside.
2. The hydrogen detection device according to claim 1, characterized in that: The fan can rotate forward and reverse. When the fan rotates forward, the fan allows the hydrogen in the external environment to enter the inner side. When the fan rotates reversely, the fan blows the attachments remaining on the filter to the outer side.
3. The hydrogen detection device according to claim 1, characterized in that: The fan and the air inlet channel are slidably connected along the axial direction of the air inlet channel.
4. The hydrogen detection device according to claim 3, characterized in that: At least one guide rail is formed in the air inlet channel, and the guide rail extends along the axial direction of the air inlet channel; A bracket is fixed on the fan, and at least one end of the bracket is slidably connected to the guide rail.
5. The hydrogen detection device according to claim 4, characterized in that: The bracket is provided with a locking assembly, and the locking assembly is used to fix the fan to the guide rail.
6. The hydrogen detection device according to claim 5, characterized in that: The locking assembly includes a retractable supporting foot, which can be extended or retracted relative to the bracket. When the retractable supporting foot is in an extended state, the fan and the guide rail are relatively locked. When the retractable supporting foot is in a retracted state, the fan and the guide rail can slide relative to each other.
7. The hydrogen detection device according to claim 5 or 6, characterized in that: The bracket is provided with a driving device, and the driving device drives the fan to rotate; and, The driving device drives the fan to slide in the air inlet channel; and The driving device drives the locking assembly to lock and unlock.
8. The hydrogen detection device according to claim 1, characterized in that: The fan comprises blades, and cleaning members are connected to the blades of the fan. The cleaning members can clean the attachments on the filter screen when the blades rotate; and / or clean the attachments on the inner wall of the device housing.
9. The hydrogen detection device according to claim 8, characterized in that: The cleaning member is a brush, which includes a brush handle and bristles arranged on the brush handle. The brush handle is fixedly connected to the edge of the fan blade, and the bristles abut against the filter and / or the inner wall of the device housing.
10. The hydrogen detection device according to claim 9, characterized in that: When the fan is located at the middle position of the air inlet channel along the axial direction, the bristles are in contact with the filter.