CN218917903U - Efficient refrigeration camera dispels heat - Google Patents
Efficient refrigeration camera dispels heat Download PDFInfo
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- CN218917903U CN218917903U CN202122600383.4U CN202122600383U CN218917903U CN 218917903 U CN218917903 U CN 218917903U CN 202122600383 U CN202122600383 U CN 202122600383U CN 218917903 U CN218917903 U CN 218917903U
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Abstract
The utility model relates to the technical field of cameras, in particular to a refrigeration camera with high heat dissipation efficiency, which comprises a thermoelectric refrigeration piece and a shell with a cavity; the refrigeration lamination is positioned between the cold end ceramic plate and the hot end ceramic plate; the opening part of shell cavity is equipped with the seal groove, install the sealing washer in the seal groove, the hot junction potsherd compresses tightly the sealing washer, seals and is fixed in the shell. The utility model has the beneficial effects that: in the refrigeration camera with high heat dissipation efficiency, the hot end ceramic plate is exposed out of the shell, and a partition plate is not needed to be additionally arranged to fix the thermoelectric refrigeration plate or the sealing shell, so that the damage to the hot end ceramic plate is avoided due to the good elastic deformation property of the sealing ring. Therefore, the cooling camera with high heat dissipation efficiency has the advantages of excellent heat dissipation effect, simple assembly and stable structure, and can better seal the shell to prevent water vapor from entering the inside of the camera.
Description
Technical Field
The utility model relates to the technical field of cameras, in particular to a refrigeration camera with efficient heat dissipation.
Background
The refrigeration type scientific camera generally adopts thermoelectric refrigeration effect to reduce the temperature of the CCD/CMOS image sensor and improve the imaging quality. However, as the temperature decreases, moisture in the air may condense and condense or freeze to damage the image sensor, so it is necessary to seal the thermoelectric refrigerator to prevent moisture from entering.
The solutions adopted by the prior art to achieve the above-mentioned aim generally have the following drawbacks:
1. and a larger pressure is required to be applied to the refrigerating sheet to compress the hot end of the refrigerating sheet with the sealing shell, so that an air gap is eliminated. But the pressure is too high to fracture the thermoelectric cooling fins easily.
2. Because the temperature difference of the thermoelectric cooling piece is extremely variable, if the thermoelectric cooling piece is connected with the camera shell in a welding or cementing mode, the strong variation of the temperature difference can lead to relative displacement among dissimilar materials, damage the cooling piece or destroy solder.
3. The assembly of each component is complex, and the heat dissipation effect is poor due to the obstruction of the sealing component, the fixing component and other components between the thermoelectric cooling fin and the radiator.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the refrigeration camera is stable in sealing structure and high in heat dissipation efficiency.
In order to solve the technical problems, the utility model adopts the following technical scheme: a cooling camera with high heat dissipation efficiency comprises a thermoelectric cooling plate, an image sensor and a shell with a cavity;
the cavity is used for accommodating an image sensor; the cavity has an opening;
the thermoelectric refrigerating sheet comprises a refrigerating lamination of a cold end ceramic sheet, a hot end ceramic sheet and a semiconductor material; the refrigeration lamination is positioned between the cold end ceramic plate and the hot end ceramic plate;
the shell is provided with a sealing groove surrounding the opening, a sealing ring is arranged in the sealing groove, and the hot end ceramic plate seals the cavity through the pressing sealing ring.
Further, the heat radiator is positioned outside the shell and connected with the hot-end ceramic plate.
Further, the radiator is a water-cooling radiating plate, a cooling liquid circulation system formed by a serpentine water channel is arranged in the water-cooling radiating plate, and radiating fins are arranged in the serpentine water channel.
Further, the thermoelectric cooling sheet further comprises an intermediate ceramic sheet, the cooling laminated layer is divided into two layers, and the intermediate ceramic sheet is positioned between the two layers of cooling laminated layers.
Further, the area and thickness of the hot end ceramic plate are larger than those of the middle layer ceramic plate and the cold end ceramic plate.
Further, the cold end ceramic plate, the hot end ceramic plate and the middle layer ceramic plate are made of high-heat-conductivity ceramic materials, and the high-heat-conductivity ceramic materials comprise BeO ceramic or SiC ceramic.
Further, the surface roughness of the contact between the hot end ceramic piece and the sealing ring and the shell is lower than Ra0.8.
Further, the housing includes a camera lower case, a camera middle case, and a camera upper case; the middle camera shell is a tubular body, and the lower camera shell seals one end of the middle camera shell; the sealing groove is formed in the end face of one end far away from the lower camera shell, the upper camera shell is annular, and the upper camera shell is connected with the middle camera shell and compresses the hot end ceramic plate towards the sealing groove.
The utility model has the beneficial effects that: in the refrigerating camera with high heat dissipation efficiency, the heat end ceramic plate seals the cavity of the shell by extruding the sealing ring, and the sealing ring is soft made of rubber, so that the heat end ceramic plate has better elastic deformation property, compared with the heat end ceramic plate and the shell which are directly contacted and sealed, the heat end ceramic plate avoids the technical problem that the thermoelectric refrigerating plate is easy to fracture due to too high pressure, and the heat end ceramic plate is further exposed out of the shell without a partition plate to fix the thermoelectric refrigerating plate or the sealing shell, so that the heat dissipation effect is better and the structure and the assembly are simple for the image sensor to dissipate heat by directly contacting with air or a radiator; therefore, the cooling camera with high heat dissipation efficiency has the advantages of excellent heat dissipation effect, simple assembly and stable structure, and can better seal the shell to prevent water vapor from entering the inside of the camera.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a cooling camera with efficient heat dissipation according to an embodiment of the present utility model;
fig. 2 is a schematic cross-sectional view of a cooling camera with efficient heat dissipation according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a thermoelectric cooling fin of a cooling camera with high heat dissipation efficiency according to an embodiment of the present utility model;
description of the reference numerals:
1. a housing; 11. a camera lower case; 12. a camera middle shell; 121. sealing grooves; 13. a camera upper case;
2. thermoelectric cooling sheets; 21. a hot-end ceramic sheet; 22. a cold end ceramic plate; 23. an intermediate layer ceramic sheet; 24. a refrigeration stack;
3. a seal ring;
4. an image sensor;
5. a window pane;
6. a heat sink.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present utility model in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
A cooling camera with high heat dissipation efficiency comprises a thermoelectric cooling plate 2, an image sensor 4 and a shell 1 with a cavity;
the cavity is used for accommodating the image sensor 4; the cavity has an opening;
the thermoelectric refrigeration piece 2 comprises a cold end ceramic piece 22, a hot end ceramic piece 21 and a refrigeration lamination 24 made of semiconductor materials; the refrigeration lamination 24 is positioned between the cold end ceramic plate 22 and the hot end ceramic plate 21;
a sealing groove 121 surrounding the opening is formed in the shell 1, a sealing ring 3 is installed in the sealing groove 121, and the hot end ceramic piece 21 seals the cavity through pressing the sealing ring 3.
From the above description, the beneficial effects of the utility model are as follows: in the refrigeration camera with high heat dissipation efficiency, the thermoelectric refrigeration piece 2 is used as a substrate to insulate a semiconductor circuit and conduct heat of the image sensor 4 through a ceramic piece; the key point is the installation structure of the hot-end ceramic plate 21, the hot-end ceramic plate 21 is exposed outside the shell 1, and no partition plate is needed to be additionally arranged to fix the thermoelectric refrigerating plate 2 or seal the shell 1, so that the radiator 6 is directly connected, the radiating effect is better, and the structure and the assembly are simple; the hot end ceramic plate 21 seals the shell 1 and simultaneously serves as a support for some parts in the shell 1, the structure of the sealed shell 1 is mainly formed by extruding the sealing ring 3, and the sealing ring 3 is soft and made of rubber, so that the sealing groove 121 fixes the sealing ring 3, and the damage to the hot end ceramic plate 21 is avoided compared with the sealing structure of directly extruding the shell 1 and the hot end ceramic plate 21. Therefore, the cooling camera with high heat dissipation efficiency has the advantages of excellent heat dissipation effect, simple assembly and stable structure, and can better seal the shell 1 to prevent water vapor from entering the inside of the camera.
Further, the heat radiator 6 and the window 5 are also included, the heat radiator 6 is located outside the shell 1 and is connected with the hot end ceramic piece 21, and the window 5 is installed inside the shell 1.
As is apparent from the above description, the above arrangement provides a mounting structure of the louver 5 and the radiator 6, in which the radiator 5 improves the heat radiation effect of the thermoelectric cooling fin 2, the louver 5 has a filtering effect, and the housing 1 is sealed with assistance, improving the air tightness and heat radiation efficiency of the cooling camera with high heat radiation efficiency.
Further, the radiator 6 is a water-cooling radiating plate, a cooling liquid circulation system formed by a serpentine water channel is arranged in the water-cooling radiating plate, and radiating fins are arranged in the serpentine water channel.
As can be seen from the above description, the above arrangement provides an efficient heat sink 6.
Further, the thermoelectric cooling fin 2 further comprises an intermediate ceramic fin 23, the cooling stack 24 is divided into two layers, and the intermediate ceramic fin 23 is located between the two layers of cooling stacks 24.
As can be seen from the above description, the refrigeration stack 24 of the thermoelectric refrigeration piece 2 is formed by connecting P-type semiconductors and N-type semiconductors in series, and the refrigeration stack 24 is divided into two layers, so that the thermoelectric refrigeration piece 2 is a two-stage refrigeration piece, the refrigeration capacity is larger than that of a single-stage refrigeration piece, and the middle ceramic piece 23 is provided as an insulating and heat-conducting medium between the semiconductor circuits.
Further, the hot end ceramic sheet 21 has a larger area and thickness than the intermediate layer ceramic sheet 23 and the cold end ceramic sheet 22.
As is clear from the above description, the hot-end ceramic sheet 21 is used for supporting other components and sealing the housing 1, so that it has high strength and large area.
Further, the cold end ceramic plate 22, the hot end ceramic plate 21 and the intermediate layer ceramic plate 23 are made of high heat conduction ceramic materials, and the high heat conduction ceramic materials comprise BeO ceramic or SiC ceramic.
As can be seen from the above description, the cold-end ceramic plate 22, the hot-end ceramic plate 21 and the intermediate ceramic plate 23 are used as not only insulating materials for protecting semiconductor circuits, but also heat transfer media, so that ceramic materials with high thermal conductivity are used as materials.
Further, the surface roughness of the contact between the hot end ceramic piece 21 and the sealing ring 3 and the shell 1 is lower than ra0.8.
As is clear from the above description, the surface roughness is too high, and a gap is generated between the contact surfaces, which is disadvantageous for sealing the housing 1.
Further, the housing 1 includes a camera lower case 11, a camera middle case 12, and a camera upper case 13; the middle camera shell 12 is a tubular body, and the lower camera shell 11 seals one end of the middle camera shell 12; the sealing groove 121 is formed on an end surface of one end far away from the camera lower shell 11, the camera upper shell 13 is annular, and the camera upper shell 13 is connected with the camera middle shell 12 and compresses the hot end ceramic wafer 21 towards the sealing groove 121.
As can be seen from the above description, the housing 1 is assembled by dividing the housing into three parts, so that the assembly and production of the housing 1 are convenient, the camera upper housing 13 is connected with the camera middle housing 12, the camera upper housing 13 and the camera middle housing 12 clamp the sealing structure of the hot end ceramic sheet 21, so that not only is the sealing performance of the hot end ceramic sheet 21 enhanced, but also the hot end ceramic sheet 21 is stably fixed.
Example 1
Referring to fig. 1-3, the present utility model relates to a use scenario of a refrigeration camera with efficient heat dissipation: the refrigeration camera adopts thermoelectric refrigeration effect to reduce the temperature of the CCD/CMOS image sensor and improve the imaging quality.
The utility model relates to a refrigerating camera with high heat dissipation efficiency, which comprises a shell 1, a thermoelectric refrigerating sheet 2, an image sensor 4, a window sheet 5, a rubber ring and a radiator 6; wherein the shell 1 is divided into a camera lower shell 11, a camera middle shell 12 and a camera upper shell 13, and the thermoelectric refrigeration piece 2 comprises a cold end ceramic piece 22, a hot end ceramic piece 21, an intermediate layer ceramic piece 23 and a two-layer refrigeration lamination 24; the middle camera shell 12 is a tubular body, the lower camera shell 11 seals one end of the middle camera shell 12, the middle camera shell 12 is provided with a sealing groove 121 surrounding the end face of the middle camera shell 12, the sealing groove 121 is arranged at one end far away from the lower camera shell 11, a part of the sealing ring 3 is installed in the sealing groove 121, the upper camera shell 13 is connected with one end face of the middle camera shell 12 where the sealing groove 121 is located and compresses the hot end ceramic piece 21 towards the sealing groove 121, the lower camera shell 11, the middle camera shell 12 and the upper camera shell 13 form a shell 1 with an open cavity, the thermoelectric refrigerating piece 2, the image sensor 4 and the window piece 5 are all arranged in the shell 1, the window piece 5 has a filtering effect, a specific cold end ceramic piece 22, an intermediate ceramic piece 23 and the hot end ceramic piece 21 are sequentially arranged as substrates, a layer of refrigerating laminate 24 is connected between the adjacent substrates, and the cold end ceramic piece 22 is connected with the image sensor 4 at one end face of the hot end ceramic piece 21 towards the lower camera shell 11; the refrigeration lamination 24 is formed by connecting an N-type semiconductor and a P-type semiconductor in series; the substrate material is a high heat conduction ceramic material, such as BeO ceramic or SiC ceramic; the surface roughness of the contact between the hot end ceramic piece 21 and the sealing ring 3 and the shell 1 is lower than Ra0.8. The radiator 6 is connected with the hot end ceramic plate 21 outside the shell 1, and the radiator 6 can be a conventional radiator 6 with a plurality of radiating fins or a water-cooling radiating plate; the cooling plate is internally provided with a cooling liquid circulation system formed by a serpentine water channel, and the serpentine water channel is internally provided with cooling fins.
Principle of: in the cooling camera with high heat dissipation efficiency, a window 5 is arranged between the lower camera shell 11 and the middle camera shell 12 in a sealing way through a sealing ring before the lower camera shell and the middle camera shell are connected; before the thermoelectric refrigerating sheet 2 is installed, one end of the cold end ceramic sheet 22 is connected with the image sensor 4; the refrigeration lamination 24 is formed by connecting a P-type semiconductor and an N-type semiconductor in series and is electrically connected; heat is transferred from one end of the thermoelectric cooling fin 2 to the other end when the power is on due to the energy level difference of electrons on the two semiconductor materials; the semiconductor circuits are isolated and protected by a ceramic plate and conduct and dissipate heat (because of the insulation property and the heat conductivity of the ceramic material), so that the ceramic material with high heat conductivity is preferably used as a substrate of the thermoelectric cooling plate 2, such as BeO or SiC; the camera upper shell 13 is connected with the camera middle shell 12 to press the hot end ceramic piece 21 towards the sealing groove 121, so that the hot end ceramic piece 21 presses the sealing ring 3 to seal the shell 1; the sealing groove 121 stabilizes the position of the sealing ring 3; the surface roughness of the contact surfaces of the hot end ceramic piece 21, the sealing ring 3 and the shell 1 needs to be set lower than Ra0.8, so that the influence of gaps between the contact surfaces on the sealing of the shell 1 is avoided; the sealing ring 3 is soft, so that the shell 1 can be sealed without excessively extruding the hot end ceramic plate 21, the thermoelectric refrigerating plate 2 is a secondary refrigerating plate, the refrigerating capacity is improved, and the hot end ceramic plate 21 is used for sealing and also used as a support of other parts, so that the area and the thickness are set larger, and the strength of the thermoelectric refrigerating plate is ensured; the radiator 6 is directly connected with the hot end ceramic piece 21; preferably, the radiator 6 can use a cold water plate type radiator 6, the serpentine water channel of which increases the contact area between the cooling liquid and the hot end ceramic plate 21, and the radiating fins increase the radiating efficiency of the cooling liquid; the heat dissipation efficiency of the thermoelectric cooling fin 2 is improved as a whole. Therefore, the heat resistance between the thermoelectric cooling fin 2 and the radiator 6 of the cooling camera with high heat dissipation efficiency is small, the heat dissipation effect is excellent, the assembly is simple, the structure is stable, and the shell 1 can be better sealed to prevent water vapor from entering the inside of the camera.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent changes made by the specification and drawings of the present utility model, or direct or indirect application in the relevant art, are included in the scope of the present utility model.
Claims (8)
1. The refrigerating camera with high heat dissipation efficiency is characterized by comprising a thermoelectric refrigerating sheet, an image sensor and a shell with a cavity;
the cavity is used for accommodating an image sensor; the cavity has an opening;
the thermoelectric refrigerating sheet comprises a refrigerating lamination of a cold end ceramic sheet, a hot end ceramic sheet and a semiconductor material; the refrigeration lamination is positioned between the cold end ceramic plate and the hot end ceramic plate;
the shell is provided with a sealing groove surrounding the opening, a sealing ring is arranged in the sealing groove, and the hot end ceramic plate seals the cavity through the pressing sealing ring.
2. The heat dissipating, efficient refrigeration camera of claim 1, further comprising a heat sink located outside the housing and connected to the hot-side ceramic wafer.
3. The efficient cooling camera of claim 2, wherein the radiator is a water-cooled radiator plate, a cooling liquid circulation system formed by a serpentine water channel is arranged in the water-cooled radiator plate, and radiating fins are arranged in the serpentine water channel.
4. The heat-dissipating, high-efficiency, refrigerated camera of claim 1, wherein the thermoelectric refrigeration sheet further comprises an intermediate ceramic sheet, the refrigeration stack being divided into two layers, the intermediate ceramic sheet being positioned between the two refrigeration stacks.
5. The heat dissipating, efficient refrigeration camera of claim 4, wherein the hot side ceramic plate has a larger area and thickness than the intermediate layer ceramic plate and the cold side ceramic plate.
6. The heat-dissipating, efficient refrigeration camera of claim 4, wherein the cold end ceramic plate, the hot end ceramic plate, and the intermediate layer ceramic plate are made of a high thermal conductivity ceramic material, and the high thermal conductivity ceramic material comprises BeO ceramic or SiC ceramic.
7. The heat dissipating efficient refrigeration camera of claim 1, wherein the surface roughness of the contact of the hot-end ceramic plate with the sealing ring and the housing is less than ra0.8.
8. The heat sink efficient refrigeration camera of claim 1, wherein the housing comprises a camera lower shell, a camera middle shell, and a camera upper shell; the middle camera shell is a tubular body, and the lower camera shell seals one end of the middle camera shell; the sealing groove is formed in the end face of one end far away from the lower camera shell, the upper camera shell is annular, and the upper camera shell is connected with the middle camera shell and compresses the hot end ceramic plate towards the sealing groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122600383.4U CN218917903U (en) | 2021-10-27 | 2021-10-27 | Efficient refrigeration camera dispels heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122600383.4U CN218917903U (en) | 2021-10-27 | 2021-10-27 | Efficient refrigeration camera dispels heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218917903U true CN218917903U (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122600383.4U Active CN218917903U (en) | 2021-10-27 | 2021-10-27 | Efficient refrigeration camera dispels heat |
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|---|---|
| CN (1) | CN218917903U (en) |
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2021
- 2021-10-27 CN CN202122600383.4U patent/CN218917903U/en active Active
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