Thermoelectric arm particle automatic arrangement positioning screen die

Abstract

The application provides a thermoelectric arm particle automatic arrangement positioning sieve die of a thermoelectric device, which comprises: a third surface and a second surface are detachably connected, so that a first die and a second die are in a first state or a second state. In the first state, a type of thermoelectric arm particles is poured, and the hollowed-out area guides the type of thermoelectric arm particles to automatically enter a part of through holes, so that the automatic arrangement of the type of thermoelectric arm particles is completed. In the second state, another type of thermoelectric arm particles is poured, and the hollowed-out area guides the type of thermoelectric arm particles to automatically enter another part of through holes, so that the automatic arrangement of the type of thermoelectric arm particles is completed. Therefore, the accurate staggered arrangement of N-type thermoelectric arm particles and P-type thermoelectric arm particles is realized, and the time cost and the labor cost are saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermoelectric device manufacturing, in particular, especially relates to a thermoelectric arm particle automatic arrangement positioning sieve die of thermoelectric device. BACKGROUND

[0002] Thermoelectric device is the core component in thermoelectric module, which is a device that can convert heat energy into electrical energy or electrical energy into heat energy. It is based on the thermoelectric effect, which uses the temperature difference between different materials to generate voltage or current. Thermoelectric effect refers to the fact that certain materials will generate voltage or current under the action of temperature difference. This effect consists of the Seebeck and Peltier effects. Thermoelectric devices have some advantages, such as high reliability, no mechanical parts, no noise and no pollution, etc. Therefore, they are widely used in some specific fields, such as temperature measurement, energy recovery, refrigeration and heating, etc.

[0003] Thermoelectric device is mainly composed of thermoelectric material, electrode, wire and packaging material. Thermoelectric material is the most critical part of thermoelectric device, which is generally divided into N-type and P-type, and is distributed in the device. They convert heat energy into electrical energy or vice versa through thermoelectric effect. Common thermoelectric materials include bismuth antimony alloy, bismuth selenide, lead selenide, tin selenide, etc. The selection of suitable thermoelectric material depends on the required thermoelectric performance, temperature range, stability and cost, etc.

[0004] The inside of thermoelectric device is composed of multiple pairs of N-type and P-type thermoelectric arms in series. The size of thermoelectric arm particles is small, and the space interval is also small. When making hundreds of pairs of thermoelectric arm devices, it takes a lot of time to manually place each particle according to the original invention, and it cannot guarantee the accuracy of the placement of thermoelectric arms. It may also cause N or P type particles to be placed in the wrong position. Therefore, it is important to have a mold that can accurately place thermoelectric arms without taking too much time.

[0005] In the prior art, there are few patents related to the arrangement and positioning of thermoelectric arms. Patent No. 202011306581.3 discloses a manufacturing method of micro thermoelectric device, which includes: opening holes on a template according to the distribution of thermoelectric arms. The size of the hole is much larger than the actual size of the thermoelectric arm, which may result in insufficient precision in placement. At the same time, it takes a lot of time to manually arrange multiple pairs of thermoelectric arm devices, greatly reducing work efficiency. Moreover, the patent requires manual judgment of the position relationship of N-type and P-type particles when manually placing particles, which may cause visual fatigue and stress, and also has a certain error rate. Patent No. 200920090279.1 discloses a crystal grain mounting die, which also requires manual judgment of the position relationship of N-type and P-type particles.

[0006] In view of this, the present invention provides a screen mold for automatically arranging and positioning thermoelectric arm particles of a thermoelectric device. Summary of the Invention

[0007] In response to the aforementioned shortcomings, a screen mold for automatically arranging and positioning thermoelectric arm particles in a thermoelectric device is provided. This invention primarily utilizes the array of through-holes in a first mold to align with the hollowed-out areas spaced apart in a second mold, thereby defining the placement of P-type and N-type thermoelectric arm particles. This improves work efficiency and device manufacturing precision, saving significant time.

[0008] The technical means adopted in the present invention are as follows:

[0009] The present invention provides a thermoelectric arm particle automatic arrangement and positioning screen mold for a thermoelectric device, comprising:

[0010] The first mold includes a first plate, wherein the first plate includes a first surface and a second surface arranged opposite to each other; the first plate includes a working area and a non-working area at least partially surrounding the working area, wherein the working area is provided with N 2 A through hole includes a first end and a second end, the first end is connected to the first surface, and the second end is connected to the second surface; the orthographic projection of the first end on the second surface is located within the orthographic projection range of the second end on the second surface, N 2 The through holes are arranged in an N×N array, where N is an even number;

[0011] The second mold includes a second plate, the second plate includes a third surface and a fourth surface arranged opposite to each other along a first direction, the first direction is the direction in which the first surface points to the second surface, and the third surface is detachably connected to the second surface; the second plate has N 2 / 2 hollow areas, each hollow area including a third end and a fourth end, the third end being connected to the third surface, the fourth end being connected to the fourth surface, the third end being shorter than the fourth end along a second direction, and the second direction being perpendicular to the first direction; N / 2 hollow areas are arranged along the second direction to form a hollow area row, the hollow area row including a first hollow area row and a second hollow area row alternately arranged along a third direction, the third direction being perpendicular to the first direction and the second direction, respectively;

[0012] In a first state, an orthographic projection of the first end of the e-th row and the f-th column on the second surface coincides with an orthographic projection of the third end of the first hollow area row on the second surface, e is an odd number and e<N, and f is an odd number and f<N; an orthographic projection of the first end of the k-th row and the h-th column on the second surface coincides with an orthographic projection of the third end of the second hollow area row on the second surface, k is an even number and k≤N, and f is an odd number and f≤N;

[0013] In the second state, the orthographic projection of the first end of the p-th column and the q-th row on the second surface coincides with the orthographic projection of the third end of the first hollow area row on the second surface, p is an even number and p≤N, q is an odd number and q<N; the orthographic projection of the first end of the x-th column and the y-th row on the second surface coincides with the orthographic projection of the third end of the second hollow area row on the second surface, x is an odd number and x<N, y is an even number and y≤N.

[0014] Furthermore, the non-working area is provided with a positioning hole, and the third surface is provided with a positioning column, and the positioning column is engaged with the positioning hole.

[0015] Furthermore, the number of the positioning holes is at least 2, and the positioning posts are arranged corresponding to the positioning holes.

[0016] Furthermore, the fourth surface is provided with a barrier;

[0017] The orthographic projection of the working area on the second surface is located within the orthographic projection range of the enclosure on the second surface.

[0018] Furthermore, a cross section is taken along the first direction, the cross section extends along the second direction, and the hollow area is an isosceles trapezoid on the cross section;

[0019] Along the second direction, the length of the second end is greater than the length of the third end.

[0020] Furthermore, a cross section is taken along the first direction, the cross section extends along the second direction, and the hollow area is funnel-shaped on the cross section;

[0021] Along the second direction, the length of the second end is greater than the length of the third end.

[0022] Furthermore, the through hole is funnel-shaped in the cross section.

[0023] Furthermore, the first plate and the second plate are both rounded.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] The present invention provides a thermoelectric device thermoelectric arm particle automatic arrangement and positioning screen mold. The third surface is detachably connected to the second surface, and the matching relationship between the first mold and the second mold can be changed. In a first state, one type of thermoelectric arm particles are poured in, and the hollow area guides the thermoelectric arm particles of that type to automatically enter a portion of the through-holes, completing the automatic arrangement of the thermoelectric arm particles of that type. In a second state, another type of thermoelectric arm particles are poured in, and the hollow area guides the thermoelectric arm particles of that type to automatically enter another portion of the through-holes, completing the automatic arrangement of the thermoelectric arm particles of that type. This achieves accurate staggered arrangement of N-type thermoelectric arm particles and P-type thermoelectric arm particles, saving time and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] Figure 1 This is a structural schematic diagram of the first mold provided by the present invention.

[0028] Figure 2 This is a structural schematic diagram of the second mold provided by the present invention.

[0029] Figure 3 for Figure 1 Cross-sectional view along the A-A' direction.

[0030] Figure 4 for Figure 2 Cross-sectional view along the BB' direction.

[0031] In the figure: 1. first mold; 2. first plate; 3. first surface; 4. second surface; 5. working area; 6. non-working area; 7. through hole; 8. first end; 9. second end; 10. second mold; 11. second plate; 12. third surface; 13. fourth surface; 14. hollow area; 15. third end; 16. fourth end; 17. positioning hole; 18. positioning column; 19. enclosure; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] Combine Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , Figure 1 A structural schematic diagram of the first mold provided by the present invention, Figure 2 A structural schematic diagram of the second mold provided by the present invention, Figure 3 for Figure 1 The cross-section along the A-A' direction, Figure 4 for Figure 2 The cross-sectional view taken along the BB' direction in the figure illustrates a specific embodiment of the automatic arrangement and positioning screen mold for thermoelectric arm particles of the thermoelectric device provided by the present invention, comprising:

[0035] The first mold 1 includes a first plate 2, the first plate 2 includes a first surface 3 and a second surface 4 arranged opposite to each other; the first plate 2 includes a working area 5 and a non-working area 6 at least partially surrounding the working area 5, and the working area 5 is provided with N 2 A through hole 7 includes a first end 8 and a second end 9. The first end 8 is connected to the first surface 3, and the second end 9 is connected to the second surface 4. The orthographic projection of the first end 8 on the second surface 4 is within the orthographic projection range of the second end 9 on the second surface 4. N 2 The through holes 7 are arranged in an N×N array, where N is an even number;

[0036] The second mold 10 includes a second plate 11, which includes a third surface 12 and a fourth surface 13 arranged opposite to each other along a first direction X. The first direction X is the direction from the first surface 3 to the second surface 4. The third surface 12 is detachably connected to the second surface 4. The second plate 11 has N 2 / 2 hollow areas 14, the hollow areas 14 including a third end 15 and a fourth end 16, the third end 15 being connected to the third surface 12, and the fourth end 16 being connected to the fourth surface 13, and the length of the third end 15 being less than the length of the fourth end 16 along the second direction Y, and the second direction Y being perpendicular to the first direction X; N / 2 hollow areas 14 are arranged along the second direction Y to form 14 rows of hollow areas, and the 14 rows of hollow areas include a first row of hollow areas 14 and a second row of hollow areas 14 alternately arranged along a third direction Z, and the third direction Z is perpendicular to the first direction X and the second direction Y, respectively;

[0037] In the first state, the orthographic projection of the first end 8 of the e-th row and the f-th column on the second surface 4 coincides with the orthographic projection of the third end 15 of the row of the first hollow area 14 on the second surface 4, e is an odd number and e<N, and f is an odd number and f<N; the orthographic projection of the first end 8 of the k-th row and the h-th column on the second surface 4 coincides with the orthographic projection of the third end 15 of the row of the second hollow area 14 on the second surface 4, k is an even number and k≤N, and f is an odd number and f≤N;

[0038] In the second state, the orthographic projection of the first end 8 of the pth column and the qth row on the second surface 4 coincides with the orthographic projection of the third end 15 of the 14th row of the first hollow area on the second surface 4, p is an even number and p≤N, q is an odd number and q<N; the orthographic projection of the first end 8 of the xth column and the yth row on the second surface 4 coincides with the orthographic projection of the third end 15 of the 14th row of the second hollow area on the second surface 4, x is an odd number and x<N, y is an even number and y≤N.

[0039] It can be understood that along the second direction Y, the length of the third end 15 is smaller than the length of the fourth end 16, and the thermoelectric arm particles placed on the side close to the fourth surface 13 are more likely to enter the hollow area 14. Under the action of gravity, the hollow area 14 guides the thermoelectric arm particles into the corresponding through holes 7 to arrange the thermoelectric arm particles.

[0040] In the first state, the orthographic projection of the first end 8 of the e-th row and f-th column on the second surface 4 coincides with the orthographic projection of the third end 15 of the first hollow area 14 row on the second surface 4. The orthographic projection of the first end 8 of the k-th row and h-th column on the second surface 4 coincides with the orthographic projection of the third end 15 of the second hollow area 14 row on the second surface 4. The through holes 7 connected to the hollow area 14 are not adjacent to each other along the second direction Y or the third direction Z. N-type thermoelectric arm particles are placed on the side close to the fourth surface 13. The N-type thermoelectric arm particles are guided by the hollow area 14 to achieve automatic spacing arrangement.

[0041] In the plane where the second plate 11 is located, the second plate 11 is rotated 90° clockwise or counterclockwise to connect the second surface 4 to the third surface 12. At this time, it is the second state. The orthographic projection of the first end 8 of the p-th column and the q-th row on the second surface 4 coincides with the orthographic projection of the third end 15 of the first hollow area 14 row on the second surface 4. The orthographic projection of the first end 8 of the x-th column and the y-th row on the second surface 4 coincides with the orthographic projection of the third end 15 of the second hollow area 14 row on the second surface 4. The through holes 7 connected to the hollow area 14 are not adjacent in the second direction Y and the third direction Z. At this time, the through holes 7 connected to the hollow area 14 are staggered with the through holes 7 connected in the first state. P-type thermoelectric arm particles are placed on the side close to the fourth surface 13. The P-type thermoelectric arm particles are automatically arranged at intervals under the guidance of the hollow area 14, thereby achieving the staggered placement of the N-type thermoelectric arm particles and the P-type thermoelectric arm particles. Of course, it is also possible to place P-type thermoelectric arm particles in the first state and N-type thermoelectric arm particles in the second state. This can be adjusted according to actual needs, and this embodiment does not impose any specific restrictions on this.

[0042] Compared with the existing technology, the automatic arrangement and positioning screen mold for the thermoelectric arm particles of the thermoelectric device provided in this embodiment can accurately arrange and position the tiny-sized N-type and P-type thermoelectric arms, minimize the error in the arrangement and positioning of the thermoelectric arms, and arrange the thermoelectric arms of the same model in a single time without having to consider whether the arrangement is wrong; it can be mass-produced, reducing the errors and mistakes in the arrangement of device sizes during manual production; the screen mold is made of metal and can be used in conjunction with the fixed mold of the ceramic sheet and directly placed in the reflow soldering furnace for use. At the same time, it also ensures the accuracy of the thermoelectric device production. They are all produced by mechanical positioning and there is no need to consider human errors.

[0043] In some embodiments, continue to refer to Figure 1 、 Figure 2 and Figure 4 The non-working area 6 is provided with a positioning hole 17 , and the third surface 12 is provided with a positioning column 18 , which is engaged with the positioning hole 17 .

[0044] It can be understood that setting the positioning column 18 and the positioning hole 17 to engage with each other as a way of detachably connecting the second surface 4 and the third surface 12, so that when the second surface 4 and the third surface 12 are bonded, the relative position of the hollow area 14 and the corresponding through hole 7 is accurate, thereby ensuring that the hollow area 14 can guide the thermoelectric arm particles into the corresponding through hole 7.

[0045] In some optional embodiments, continue to refer to Figure 1 、 Figure 2 and Figure 4 The number of the positioning holes 17 is at least 2, and the positioning columns 18 are arranged corresponding to the positioning holes 17.

[0046] It is understandable that at least two positioning holes 17 engage with the positioning posts 18 to ensure positioning accuracy and stability of the connection between the second surface 4 and the third surface 12 .

[0047] In some optional embodiments, continue to refer to Figure 2 and Figure 4 , the fourth surface 13 is provided with a barrier 19;

[0048] The orthographic projection of the working area 5 on the second surface 4 is located within the orthographic projection range of the enclosure 19 on the second surface 4 .

[0049] It is understandable that the setting of the enclosure 19 will not affect the guiding function of the hollow area 14 , and can also prevent the problem of thermoelectric arm particles falling when the thermoelectric arm particles are placed from the side close to the fourth surface 13 .

[0050] In some optional embodiments, a cross section is taken along the first direction X, and the cross section extends along the second direction Y. The hollow area 14 is an isosceles trapezoid in the cross section;

[0051] Along the second direction Y, the length of the second end 9 is greater than the length of the third end 15 .

[0052] It is understood that the cross-section of the hollow region 14 is an isosceles trapezoid, which facilitates the sliding of thermoelectric arm particles entering the hollow region 14 into the corresponding through-hole 7. The length of the second end 9 is greater than the length of the third end 15, which can prevent the thermoelectric arm particles from getting stuck at the intersection of the hollow region 14 and the through-hole 7.

[0053] In some optional embodiments, continue to refer to Figure 2 and Figure 4 , taking a cross section along the first direction X, the cross section extends along the second direction Y, and the hollow area 14 is funnel-shaped in the cross section;

[0054] Along the second direction Y, the length of the second end 9 is greater than the length of the third end 15 .

[0055] It is understood that the hollow area 14 is funnel-shaped in cross section, which facilitates the thermoelectric arm particles entering the hollow area 14 to slide into the corresponding through-hole 7. The length of the second end 9 is greater than the length of the third end 15, which can prevent the thermoelectric arm particles from getting stuck at the intersection of the hollow area 14 and the through-hole 7.

[0056] In some optional embodiments, continue to refer to Figure 1 and Figure 3 , the through hole 7 is funnel-shaped in cross section.

[0057] It is understood that the length of second end 9 is greater than that of third end 15, that is, the length of second end 9 is greater than that of first end 8. This prevents the thermoelectric arm particles from getting stuck at the intersection of hollow area 14 and through-hole 7, and also forms a slope to facilitate the sliding of the thermoelectric arm particles. The size of first end 8 is the size of the area pre-set for the placement of thermoelectric arm particles, ensuring a more precise landing point for the thermoelectric arm particles. It is more reasonable to set through-hole 7 to have a funnel-shaped cross-section.

[0058] In some optional embodiments, continue to refer to Figure 1 and Figure 2 The first plate 2 and the second plate 11 are both rounded.

[0059] It can be understood that the rounded corners can avoid sharp corners between the first plate 2 and the second plate 11, thereby improving safety in use.

[0060] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0061] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above 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 invention.

Claims

1. A thermoelectric arm particle automatic arrangement and positioning screen mold for a thermoelectric device, characterized in that: include: The first mold includes a first plate, wherein the first plate includes a first surface and a second surface arranged opposite to each other; the first plate includes a working area and a non-working area at least partially surrounding the working area, wherein the working area is provided with N 2 A through hole includes a first end and a second end, the first end is connected to the first surface, and the second end is connected to the second surface; the orthographic projection of the first end on the second surface is located within the orthographic projection range of the second end on the second surface, N 2 The through holes are arranged in an N×N array, where N is an even number; The second mold includes a second plate, the second plate includes a third surface and a fourth surface arranged opposite to each other along a first direction, the first direction is the direction in which the first surface points to the second surface, and the third surface is detachably connected to the second surface; the second plate has N 2 / 2 hollow areas, each hollow area including a third end and a fourth end, the third end being connected to the third surface, the fourth end being connected to the fourth surface, the third end being shorter than the fourth end along a second direction, and the second direction being perpendicular to the first direction; N / 2 hollow areas are arranged along the second direction to form a hollow area row, the hollow area row including a first hollow area row and a second hollow area row alternately arranged along a third direction, the third direction being perpendicular to the first direction and the second direction, respectively; In a first state, an orthographic projection of the first end of the e-th row and the f-th column on the second surface coincides with an orthographic projection of the third end of the first hollow area row on the second surface, e is an odd number and e<N, and f is an odd number and f<N; an orthographic projection of the first end of the k-th row and the h-th column on the second surface coincides with an orthographic projection of the third end of the second hollow area row on the second surface, k is an even number and k≤N, and f is an odd number and f≤N; In the second state, the orthographic projection of the first end of the p-th column and the q-th row on the second surface coincides with the orthographic projection of the third end of the first hollow area row on the second surface, p is an even number and p≤N, q is an odd number and q<N; the orthographic projection of the first end of the x-th column and the y-th row on the second surface coincides with the orthographic projection of the third end of the second hollow area row on the second surface, x is an odd number and x<N, y is an even number and y≤N.

2. The automatic positioning screen mold for thermoelectric arm particles of a thermoelectric device according to claim 1, characterized in that: The non-working area is provided with a positioning hole, and the third surface is provided with a positioning column, and the positioning column is engaged with the positioning hole.

3. The automatic positioning screen mold for thermoelectric arm particles of a thermoelectric device according to claim 2, characterized in that: The number of the positioning holes is at least 2, and the positioning posts are arranged corresponding to the positioning holes.

4. The automatic positioning screen mold for thermoelectric arm particles of a thermoelectric device according to claim 1 or 2, characterized in that: The fourth surface is provided with a fence; The orthographic projection of the working area on the second surface is located within the orthographic projection range of the enclosure on the second surface.

5. The automatic positioning screen mold for thermoelectric arm particles of a thermoelectric device according to claim 1, characterized in that: Take a cross section along the first direction, the cross section extends along the second direction, and the hollow area is an isosceles trapezoid on the cross section; Along the second direction, the length of the second end is greater than the length of the third end.

6. The automatic positioning screen mold for thermoelectric arm particles of a thermoelectric device according to claim 1, characterized in that: Take a cross section along the first direction, the cross section extends along the second direction, and the hollow area is funnel-shaped in the cross section; Along the second direction, the length of the second end is greater than the length of the third end.

7. The automatic positioning screen mold for thermoelectric arm particles of a thermoelectric device according to claim 5 or 6, characterized in that: The through hole is funnel-shaped in the cross section.

8. The automatic positioning screen mold for thermoelectric arm particles of a thermoelectric device according to claim 1, characterized in that: The first plate and the second plate are both rounded.

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