CN116456704A - Liquid crystal display television with high heat dissipation efficiency - Google Patents
Liquid crystal display television with high heat dissipation efficiency Download PDFInfo
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- CN116456704A CN116456704A CN202310702309.4A CN202310702309A CN116456704A CN 116456704 A CN116456704 A CN 116456704A CN 202310702309 A CN202310702309 A CN 202310702309A CN 116456704 A CN116456704 A CN 116456704A
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- Prior art keywords
- heat dissipation
- heat
- telescopic
- fin
- working medium
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 127
- 239000004973 liquid crystal related substance Substances 0.000 title abstract description 14
- 238000009835 boiling Methods 0.000 claims abstract description 34
- 230000000694 effects Effects 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims description 26
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000004519 grease Substances 0.000 claims description 10
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical group CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical group S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000004512 die casting Methods 0.000 claims description 2
- 230000001737 promoting effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 2
- 229920001296 polysiloxane Polymers 0.000 description 9
- 238000005192 partition Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical group S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20409—Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20263—Heat dissipaters releasing heat from coolant
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20509—Multiple-component heat spreaders; Multi-component heat-conducting support plates; Multi-component non-closed heat-conducting structures
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention relates to the technical field of televisions, in particular to a liquid crystal television with high heat dissipation efficiency, which comprises a lamp strip, a heat conducting plate, a plurality of first heat dissipation groups and a plurality of second heat dissipation groups; the lamp strip sets up along first direction and installs in the casing, and a plurality of first heat dissipation group and a plurality of second heat dissipation group set gradually alternate along first direction in the casing, and the heat energy of lamp strip can be transmitted to first heat dissipation group and second heat dissipation group through the heat conduction board. According to the liquid crystal television with high heat dissipation efficiency, the first heat dissipation plate is driven to dissipate heat by the first telescopic cavity only when the temperature of the lamp strip is higher than the boiling point of the first working medium but lower than the boiling point of the second working medium by matching the first heat dissipation group and the second heat dissipation group, and the second heat dissipation plate is driven to dissipate heat by the second telescopic cavity when the temperature of the lamp strip is higher than the boiling point of the second working medium, so that the heat dissipation effect of the television is ensured.
Description
Technical Field
The invention relates to the technical field of televisions, in particular to a liquid crystal television with high heat dissipation efficiency.
Background
When the lcd tv is in operation, the internal light emitting element (LED light bar) generates a large amount of heat, so that it is necessary to perform targeted heat dissipation on the light source. In the prior art, the heat dissipation mode of the light source is single, generally aluminum extrusion is adopted as a heat dissipation component, the heat dissipation is carried out in a natural convection mode by means of aluminum extrusion, and the heat transfer path is from the LED light bar to the aluminum extrusion and then to the air. However, with the continuous updating and upgrading of the television, the heat dissipation requirement of the television cannot be met only by means of aluminum extrusion, and the other way is to utilize the thermosiphon type heat dissipation plate to dissipate heat.
Disclosure of Invention
The invention provides a liquid crystal television with high heat dissipation efficiency, which solves the problem that the existing television cannot adjust the heat dissipation effect according to the heating condition of a television light bar, so that the heat dissipation effect is not ideal.
The liquid crystal television with high heat dissipation efficiency adopts the following technical scheme: the liquid crystal television with high heat dissipation efficiency comprises a shell, a display panel arranged in the shell, a lamp strip, a heat conducting plate, a plurality of first heat dissipation groups and a plurality of second heat dissipation groups, wherein the display panel is positioned on one side of the shell; the lamp strip is arranged along the first direction and is arranged in the shell, the plurality of first heat dissipation groups and the plurality of second heat dissipation groups are sequentially and alternately arranged in the shell along the first direction, and heat conducting plates are arranged between the plurality of first heat dissipation groups and the plurality of second heat dissipation groups and the lamp strip, so that heat energy of the lamp strip can be transferred to the first heat dissipation groups and the second heat dissipation groups through the heat conducting plates; the first heat dissipation group comprises a first heat dissipation fin and a first telescopic chamber, the first heat dissipation fin is arranged at the upper end of the first telescopic chamber, the first telescopic chamber can move in the vertical direction, the second heat dissipation group comprises a second heat dissipation fin and a second telescopic chamber, the second heat dissipation fin is arranged at the upper end of the second telescopic chamber, and the second telescopic chamber can move in the vertical direction; the first telescopic cavity is filled with a first working medium, the second telescopic cavity is filled with a second working medium, and the boiling point of the second working medium is greater than that of the first working medium; when the heat energy is transferred to the first heat dissipation group and the second heat dissipation group through the heat conducting plate by the light bar, when the temperature reaches the boiling point of the first working medium in the first telescopic cavity, the first telescopic cavity moves upwards, the first heat radiating fin is further caused to extend upwards out of the shell, when the temperature reaches the boiling point of the second working medium in the second telescopic cavity, the second telescopic cavity moves upwards, the second heat radiating fin is further caused to extend upwards out of the cavity, and the heat is dissipated under the combined action of the second heat radiating fin and the first heat radiating fin.
Further, the first working medium is carbon disulfide, and the second working medium is acetone.
Further, the first telescopic chamber comprises a first upper chamber, a first telescopic sleeve and a first lower chamber which are sequentially arranged and communicated in the vertical direction; the first working medium is filled in the first lower cavity, the second telescopic cavity comprises a second upper cavity, a second telescopic sleeve and a second lower cavity which are sequentially arranged and communicated in the vertical direction, the second working medium is filled in the second lower cavity, and the first telescopic sleeve and the second telescopic sleeve are of telescopic structures.
Further, a dustproof shell is arranged in the shell and arranged along the first direction, and a first storage groove for inserting the first radiating fins and a second storage groove for inserting the second radiating fins are formed in the dustproof shell.
Further, the first lower chamber and the second lower chamber are respectively provided with a boss, and the lower end face of the dustproof shell is in contact with the upper end face of the boss.
Further, the first radiating fin and the second radiating fin are made of die-casting aluminum, and the outer surface of the second radiating fin is coated with an aluminum nitride coating.
Further, first fin and second fin upper end all are provided with the top cap, be provided with the division board between first storage tank and the second storage tank, make there is first clearance between every two adjacent first fin and the second fin that set up, the second fin both ends all are provided with the connecting plate, and leave the second clearance between connecting plate and this second fin, the connecting plate has the heat conductivity, all be provided with flexible shell on two connecting plates, flexible shell sets up in the one side that the second fin was kept away from to relative connecting plate, flexible shell can slide at the top cap lower extreme, set gradually two elastic pieces from the top down along vertical direction in the flexible shell, the elastic piece is the arch structure, initially flexible shell is retrieved to in the second clearance, the elastic piece is compressed this moment, and keep the compression state under the effect of division board, the elastic piece is compressed, extrude flexible shell in the second clearance, make flexible shell have the trend that moves to keeping away from first fin, inject the filling chamber between two lateral walls of two elastic pieces and flexible shell, the filling chamber intussuseption is filled with silicone grease, set up at least one on the flexible shell and set up at least one through-hole along the plug, the plug is set up to the plug is small in the plug, and the plug is set up to the plug is connected to the plug.
Further, the upper elastic piece is connected with the upper top wall of the telescopic shell through the first elastic piece, and the initial first elastic piece has a tendency of promoting the lower elastic piece to move downwards.
Further, the heat conducting plate is of an L-shaped structure, the heat conducting plate comprises a first plate section and a second plate section, the first plate section is perpendicular to the second plate section, the first plate section is in contact with the lamp strip, the second plate section is in contact with a plurality of first heat dissipation groups and a plurality of second heat dissipation groups, and heat energy of the lamp strip can be transferred to the first heat dissipation groups and the second heat dissipation groups through the heat conducting plate.
The beneficial effects of the invention are as follows: according to the liquid crystal television with high heat dissipation efficiency, the first heat dissipation group is matched with the second heat dissipation group, when the lamp strip heats, heat is transmitted to the plurality of first heat dissipation groups and the plurality of second heat dissipation groups through the heat conducting plate, when the temperature reaches the boiling point of the first working medium in the first telescopic cavity, the first working medium is evaporated continuously, the internal air pressure is increased continuously, the first telescopic cavity is driven to be increased, and then the first heat radiating fin is driven to extend upwards out of the shell.
When the temperature continuously rises and reaches the boiling point of a second working medium in the second telescopic chamber, the second working medium continuously evaporates, the internal air pressure continuously rises, the second telescopic chamber is driven to rise, and then the second radiating fin is driven to extend upwards out of the shell, namely, according to the heating condition of the television lamp strip, along with the continuous rising of the temperature of the lamp strip, the first radiating group and the second radiating group are matched to radiate heat, when the temperature of the lamp strip is higher than the boiling point of the first working medium but lower than the boiling point of the second working medium, the first radiating fin is driven to radiate heat only through the first telescopic chamber, and when the temperature of the lamp strip is higher than the boiling point of the second working medium, the second radiating fin is driven to radiate heat through the second telescopic chamber, so that the radiating effect of the television is ensured.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an overall structure of an lcd tv with high heat dissipation efficiency according to an embodiment of the present invention;
fig. 2 is a front view showing the overall structure of an lcd tv with high heat dissipation efficiency according to an embodiment of the present invention;
FIG. 3 is an enlarged view taken along line A-A of FIG. 2;
fig. 4 is a schematic diagram of an internal structure of an lcd tv with high heat dissipation efficiency according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a dustproof shell structure of an embodiment of a liquid crystal display television with high heat dissipation efficiency according to the present invention;
fig. 6 is a front view showing an internal structure of an lcd tv with high heat dissipation efficiency according to an embodiment of the present invention, in which both the first heat sink and the second heat sink are retracted;
fig. 7 is a front view showing an internal structure of a liquid crystal display television with high heat dissipation efficiency when a first heat sink is lifted;
fig. 8 is a front view showing an internal structure of an lcd tv with high heat dissipation efficiency according to an embodiment of the present invention when the first heat sink and the second heat sink are raised;
fig. 9 is a schematic structural diagram of a second expansion chamber of an lcd tv with high heat dissipation efficiency according to an embodiment of the present invention;
fig. 10 is a front view of a second telescopic chamber of an embodiment of a high heat dissipation lcd tv according to the present invention;
FIG. 11 is an enlarged view of FIG. 10 taken along line B-B (telescoping shell retracted);
fig. 12 is a schematic view showing a state that a telescopic housing of a liquid crystal display television with high heat dissipation efficiency is extended.
In the figure: 100. a housing; 110. a first vent; 120. a through port; 130. a fan; 140. a bracket; 200. a display panel; 300. a light bar; 400. a heat conductive plate; 500. a first heat dissipation group; 510. a first telescoping chamber; 511. a first upper chamber; 512. a first telescoping sleeve; 513. a first lower chamber; 520. a first heat sink; 600. a second heat dissipation group; 610. a second telescoping chamber; 611. a second upper chamber; 612. the second telescopic sleeve; 613. a second lower chamber; 620. a second heat sink; 621. a connecting plate; 622. a telescoping shell; 623. an elastic sheet; 624. filling the cavity; 625. a first spring; 626. a through hole; 627. an aluminum nitride coating; 628. plugging the column; 700. a dust-proof case; 710. a first storage groove; 720. a second storage groove; 730. a partition plate; 800. a boss; 900. and a top cover.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An embodiment of a liquid crystal display television with high heat dissipation efficiency according to the present invention is shown in fig. 1 to 12.
A liquid crystal display television with high heat dissipation efficiency comprises a shell 100, a display panel 200, a light bar 300, a heat conducting plate 400, a plurality of first heat dissipation groups 500 and a plurality of second heat dissipation groups 600.
The housing 100 is disposed along a first direction, which is a horizontal direction of the housing 100. The upper end of the housing 100 is provided with a through opening 120. Two brackets 140 are provided at the lower end of the housing 100 to support and mount the housing 100. The display panel 200 is installed in the shell 100 and is located at one side of the shell 100, the light bar 300 is arranged in the shell 100 along the first direction, the light bar 300 and the display panel 200 are arranged at the same side and below the display panel 200, the normal working temperature of the light bar 300 is-25-60 ℃, a plurality of fans 130 are arranged at the other side of the shell 100, the fans 130 are uniformly distributed along the first direction and are communicated with the outside, the light bar 300 is electrically connected with the fans 130, and when the television is electrified and used, the light bar 300 and the fans 130 are synchronously started to work, and the interior of the shell 100 is cooled through the fans 130. Specifically, the casing 100 is provided with a plurality of first ventilation holes 110, and when the fan 130 is started, the first ventilation holes 110 are communicated with the outside.
The plurality of first heat dissipation groups 500 and the plurality of second heat dissipation groups 600 are all disposed in the housing 100, and the first heat dissipation groups 500 and the second heat dissipation groups 600 are sequentially and alternately disposed in the housing 100 along the first direction, and the heat conducting plates 400 are disposed between the plurality of first heat dissipation groups 500 and the plurality of second heat dissipation groups 600 and the light bars 300, so that heat energy of the light bars 300 can be transferred to the first heat dissipation groups 500 and the second heat dissipation groups 600 through the heat conducting plates 400. Specifically, the heat conducting plate 400 is in an L-shaped structure, and the heat conducting plate 400 includes a first plate segment and a second plate segment, where the first plate segment is perpendicular to the second plate segment, the first plate segment contacts the light bar 300, and the second plate segment contacts the plurality of first heat dissipation groups 500 and the plurality of second heat dissipation groups 600, so that heat energy of the light bar 300 can be transferred to the first heat dissipation groups 500 and the second heat dissipation groups 600 through the heat conducting plate 400. The first heat dissipation group 500 includes a first heat dissipation fin 520 and a first expansion chamber 510, the first heat dissipation fin 520 is installed at an upper end of the first expansion chamber 510, the first expansion chamber 510 can move in a vertical direction, the second heat dissipation group 600 includes a second heat dissipation fin 620 and a second expansion chamber 610, the second heat dissipation fin 620 is installed at an upper end of the second expansion chamber 610, and the second expansion chamber 610 can move in a vertical direction.
The first expansion chamber 510 is filled with a first working medium, the second expansion chamber 610 is filled with a second working medium, and the boiling point of the second working medium is greater than that of the first working medium; when the heat energy is transferred from the light bar 300 to the first heat dissipating unit 500 and the second heat dissipating unit 600 through the heat conducting plate 400, the first heat dissipating unit 510 moves upward when the temperature reaches the boiling point of the first working medium in the first heat dissipating unit 510, thereby causing the first heat dissipating fin 520 to extend upward out of the housing 100, and the second heat dissipating unit 610 moves upward when the temperature reaches the boiling point of the second working medium in the second heat dissipating unit 610, thereby causing the second heat dissipating fin 620 to extend upward out of the housing.
Specifically, the first working medium is carbon disulfide (boiling point 46.3 ℃), and the second working medium is acetone (boiling point 56.1 ℃), i.e., the boiling point of the second working medium is greater than that of the first working medium. The first telescopic chamber 510 includes a first upper chamber 511, a first telescopic sleeve 512, and a first lower chamber 513 which are sequentially disposed and communicated in a vertical direction; the first working medium is filled in the first lower chamber 513, the second telescopic chamber 610 includes a second upper chamber 611, a second telescopic sleeve 612 and a second lower chamber 613 which are sequentially arranged and communicated in the vertical direction, the second working medium is filled in the second lower chamber 613, and the first telescopic sleeve 512 and the second telescopic sleeve 612 are telescopic structures. After the first working medium in the first lower chamber 513 is heated to reach its boiling point, the air pressure inside the whole first expansion chamber 510 will be increased, after the air pressure inside the first expansion chamber 510 is increased, the first expansion sleeve 512 will push the first upper chamber 511 upward, and further drive the first cooling fin 520 upward, and similarly, after the second working medium in the second lower chamber 613 is heated to reach its boiling point, the air pressure inside the whole second expansion chamber 610 will be increased, and after the air pressure inside the second expansion chamber 610 is increased, the second expansion sleeve 612 will push the second upper chamber 611 upward, and further drive the second cooling fin 620 upward.
When the television is not used any more, the boiling point of the second working medium is greater than that of the first working medium, so that the second working medium is cooled to be lower than that of the first working medium, and when the temperature is gradually smaller than that of the second working medium in the second telescopic chamber 610, the internal air pressure of the second telescopic chamber 610 is gradually reduced, so that the second telescopic sleeve 612 is reset to drive the second upper chamber 611 to be reset. Similarly, when the temperature is gradually smaller than the boiling point of the first working medium in the first telescopic chamber 510, the internal air pressure of the first telescopic chamber 510 gradually becomes smaller, so that the first telescopic sleeve 512 is reset, and the first upper chamber 511 is driven to be reset.
In this embodiment, the top covers 900 are disposed on the upper ends of the first heat sink 520 and the second heat sink 620, and the top covers 900 can protrude upward from the through openings 120 to the housing 100. The first heat sink 520 and the second heat sink 620 are made of die-cast aluminum ADC12 (with a heat conductivity of 96.2W/m·k), which has simple process and low cost, and the second heat sink 620 has an aluminum nitride coating 627 (with a heat conductivity of 320W/m·k) coated on an outer surface thereof, the heat conductivity of the aluminum nitride coating 627 can be greater than that of die-cast aluminum, and when the first heat sink 500 and the second heat sink 600 are in the second state in the housing 100, the heat dissipation performance of the television is further increased and the heat dissipation effect of the television is improved by coating the aluminum nitride coating 627 on the outer surface of the second heat sink 620.
In this embodiment, by setting the first heat dissipation group 500 and the second heat dissipation group 600 to cooperate, when the light bar 300 generates heat, the fan 130 starts to work, and meanwhile, heat is also transferred to the plurality of first heat dissipation groups 500 and the plurality of second heat dissipation groups 600 through the heat conducting plate 400, when the temperature reaches the boiling point of the first working medium in the first expansion chamber 510, the first working medium is continuously evaporated, the internal air pressure is continuously increased, the first expansion sleeve 512 is driven to be increased, and the first heat dissipating fins 520 are further driven to extend upwards out of the housing 100.
When the temperature continuously rises and reaches the boiling point of the second working medium in the second telescopic chamber 610, the second working medium continuously evaporates, the internal air pressure continuously rises, the second telescopic sleeve 612 is driven to rise, and then the second cooling fin 620 is driven to extend upwards out of the shell 100, namely, as the temperature of the light bar 300 continuously rises, the first cooling fin 520 and the second cooling fin 620 are automatically retracted under the action of the first telescopic sleeve 512 and the second telescopic sleeve 612, so that the light bar 300 is enabled to radiate heat only when the temperature of the light bar 300 is higher than the boiling point of the first working medium but lower than the boiling point of the second working medium, the first cooling fin 520 and the second cooling fin 520 are driven to radiate heat only through the first telescopic sleeve 512, and when the temperature of the light bar 300 is higher than the boiling point of the second working medium, the second cooling fin 620 is driven to radiate heat further through the second telescopic sleeve 612, and the first working medium and the second working medium are cooled after the temperature of the light bar 300 is reduced, and the first cooling fin 520 and the second cooling fin 620 are automatically retracted under the action of the first telescopic sleeve 512 and the second telescopic sleeve 612, so that the long-time exposure to the outside is avoided to cause the first fin 520 and the second fin 620 and the second cooling fin 620 to accumulate and the ash and the aluminum nitride coating 627.
In this embodiment, a dust-proof case 700 is disposed in the housing 100, and the dust-proof case 700 is disposed along the first direction, and a first receiving groove 710 for inserting the first heat sink 520 and a second receiving groove 720 for inserting the second heat sink 620 are disposed on the dust-proof case 700. Further, the first lower chamber 513 and the second lower chamber 613 are respectively provided with a boss 800, the lower end surface of the dust-proof shell 700 is in contact with the upper end surface of the boss 800, and the dust-proof shell 700 is limited by the boss 800.
In this embodiment, a spacer 730 is disposed between the first receiving slot 710 and the second receiving slot 720, so that a first gap exists between each two adjacent first cooling fins 520 and second cooling fins 620, two ends of each second cooling fin 620 are respectively provided with a connecting plate 621, a second gap is left between each connecting plate 621 and each second cooling fin 620, each connecting plate 621 has thermal conductivity, two connecting plates 621 are respectively provided with a telescopic shell 622, and the telescopic shells 622 are disposed on one side of the opposite connecting plates 621 away from the second cooling fins 620. The telescopic shell 622 can slide at the lower end of the top cover 900, two elastic sheets 623 are sequentially arranged in the telescopic shell 622 from top to bottom along the vertical direction, the elastic sheets 623 are of an arch structure, the initial telescopic shell 622 is retracted into the second gap, at this time, the elastic sheets 623 are compressed and kept in a compressed state under the action of a partition plate 730, the telescopic shell 622 has a trend of moving away from the second radiating fin 620, a filling cavity 624 is defined between the two elastic sheets 623 and the two side walls of the telescopic shell 622, silicone grease is filled in the filling cavity 624, the silicone grease is known to have good heat conducting performance, at least one through hole 626 is formed in the telescopic shell 622, the through hole 626 is communicated with the filling cavity 624, at least one plugging column 628 is arranged in the filling cavity 624, the plugging column 628 is arranged along the first direction, the initial plugging column 628 is inserted into the through hole 626, silicone grease is prevented from leaking out, and the length of the plugging column 628 is smaller than the moving distance of the telescopic shell 622. The lower end of the telescopic case 622 is provided with a slope, and when the second heat sink 620 is retracted, the telescopic case 622 will contact the partition plate 730 downward along the slope, so that the telescopic case 622 is retracted into the second gap.
Further, the upper elastic piece 623 and the upper top wall of the telescopic case 622 are connected by a first elastic member, and the initial first elastic member has a tendency to urge the upper elastic piece 623 to move downward, and the first elastic member is a first spring 625, and the initial first spring 625 is in a compressed state.
That is, the initial second heat sink 620 is located between the two partition plates 730, and the extension cases 622 at both ends of the second heat sink 620 are kept in the second gap under the limitation of the partition plates 730, so that the initial extension cases 622 are retracted into the second gap, at this time, the elastic pieces 623 are compressed and kept in a compressed state under the action of the partition plates 730, when the second heat sink 620 extends upward out of the housing 100, under the action of the elastic pieces 623, the extension cases 622 are moved and extended in a direction away from the first heat sink 520, and because the length of the plugging columns 628 is smaller than that of the extension cases 622, after the extension cases 622 are moved, the through holes 626 are leaked, under the action of the elastic pieces 623 and the first springs 625, silicone grease can be discharged from the through holes 626 to be in contact with the first heat sink 520, and the first gap between each two adjacently arranged first heat sink 520 and the second heat sink 620 is filled, so that heat on the first heat sink 520 can be transferred to the second heat sink 620 via silicone grease, thereby helping the first heat sink 520 and the heat sink 520 to improve the heat dissipation effect of the first heat sink 520 and the second heat sink 620.
By combining the above embodiments, the specific working principle and working process are as follows: when the television is electrified and used, the lamp strip 300 heats, the lamp strip 300 and the fan 130 are synchronously started to work, the inside of the shell 100 is cooled by the fan 130, meanwhile, heat is also transferred to the plurality of first heat dissipation groups 500 and the plurality of second heat dissipation groups 600 through the heat conducting plate 400, when the temperature reaches the boiling point of a first working medium in the first telescopic cavity 510, the first working medium is continuously evaporated, the air pressure in the first telescopic cavity 510 is continuously increased, the first telescopic sleeve 512 is driven to be increased, and the first heat radiating fins 520 are driven to extend out of the shell 100 upwards.
When the temperature continuously rises and reaches the boiling point of the second working medium in the second telescopic chamber 610, the second working medium continuously evaporates, the air pressure inside the second telescopic chamber 610 continuously rises, the second telescopic sleeve 612 is driven to rise, and then the second cooling fin 620 is driven to extend upwards out of the shell 100, that is, along with the continuous rise of the temperature of the light bar 300, the first cooling group 500 and the second cooling group 600 are matched to cool, so that when the temperature of the light bar 300 is greater than the boiling point of the first working medium but less than the boiling point of the second working medium, the first cooling fin 520 is driven to cool only through the first telescopic sleeve 512. When the temperature of the light bar 300 is greater than the boiling point of the second working medium, the second heat dissipation fins 620 are driven to dissipate heat by the second telescopic sleeve 612, when the second heat dissipation fins 620 extend upwards out of the shell 100, under the action of the elastic fins 623, the telescopic shell 622 moves and extends away from the second heat dissipation fins 620, since the length of the plugging column 628 is smaller than that of the telescopic shell 622, after the telescopic shell 622 moves, the silicone grease leaks out through the through holes 626, the silicone grease can be discharged from the through holes 626 to be in contact with the first heat dissipation fins 520 under the action of the elastic fins 623 and the first springs 625, and a first gap between each two adjacently arranged first heat dissipation fins 520 and second heat dissipation fins 620 is filled, so that heat on the first heat dissipation fins 520 can be transferred to the second heat dissipation fins 620 through the silicone grease, the first heat dissipation fins 520 are helped, and the heat dissipation effect of the first heat dissipation fins 520 and the second heat dissipation fins 620 is improved.
After the temperature of the light bar 300 is reduced after the television is not used any more, the first working medium and the second working medium are cooled, and the first cooling fin 520 and the second cooling fin 620 are automatically retracted under the action of the first telescopic sleeve 512 and the second telescopic sleeve 612, so that the first cooling fin 520 and the second cooling fin 620 are prevented from being accumulated and the aluminum nitride coating 627 is prevented from being hydrolyzed due to long-time exposure to the outside (the aluminum nitride coating 627 is known to be easy to hydrolyze). And when the second heat sink 620 is retracted, the telescoping shell 622 will contact the spacer plate 730 downwardly along the incline, retracting the telescoping shell 622 into the second gap.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. The utility model provides a LCD TV of high radiating efficiency, includes the casing and installs the display panel in the casing, and display panel is located casing one side, its characterized in that: the LED lamp also comprises a lamp strip, a heat-conducting plate, a plurality of first heat dissipation groups and a plurality of second heat dissipation groups; the lamp strip is arranged along the first direction and is arranged in the shell, the plurality of first heat dissipation groups and the plurality of second heat dissipation groups are sequentially and alternately arranged in the shell along the first direction, and heat conducting plates are arranged between the plurality of first heat dissipation groups and the plurality of second heat dissipation groups and the lamp strip, so that heat energy of the lamp strip can be transferred to the first heat dissipation groups and the second heat dissipation groups through the heat conducting plates; the first heat dissipation group comprises a first heat dissipation fin and a first telescopic chamber, the first heat dissipation fin is arranged at the upper end of the first telescopic chamber, the first telescopic chamber can move in the vertical direction, the second heat dissipation group comprises a second heat dissipation fin and a second telescopic chamber, the second heat dissipation fin is arranged at the upper end of the second telescopic chamber, and the second telescopic chamber can move in the vertical direction;
the first telescopic cavity is filled with a first working medium, the second telescopic cavity is filled with a second working medium, and the boiling point of the second working medium is greater than that of the first working medium; when the heat energy is transferred to the first heat dissipation group and the second heat dissipation group through the heat conducting plate by the light bar, when the temperature reaches the boiling point of the first working medium in the first telescopic cavity, the first telescopic cavity moves upwards, the first heat radiating fin is further caused to extend upwards out of the shell, when the temperature reaches the boiling point of the second working medium in the second telescopic cavity, the second telescopic cavity moves upwards, the second heat radiating fin is further caused to extend upwards out of the cavity, and the heat is dissipated under the combined action of the second heat radiating fin and the first heat radiating fin.
2. The lcd tv of claim 1, wherein: the first working medium is carbon disulfide, and the second working medium is acetone.
3. The lcd tv of claim 1 or 2, wherein: the first telescopic chamber comprises a first upper chamber, a first telescopic sleeve and a first lower chamber which are sequentially arranged and communicated in the vertical direction; the first working medium is filled in the first lower cavity, the second telescopic cavity comprises a second upper cavity, a second telescopic sleeve and a second lower cavity which are sequentially arranged and communicated in the vertical direction, the second working medium is filled in the second lower cavity, and the first telescopic sleeve and the second telescopic sleeve are of telescopic structures.
4. The lcd tv of claim 3, wherein: be provided with the dirt proof boot in the casing, the dirt proof boot sets up along first direction, is provided with the second of being used for grafting first cooling fin and grafting second cooling fin and accomodates the groove on the dirt proof boot.
5. The lcd tv of claim 4, wherein: the first lower cavity and the second lower cavity are respectively provided with a boss, and the lower end face of the dustproof shell is contacted with the upper end face of the boss.
6. The lcd tv of claim 4, wherein: the first radiating fin and the second radiating fin are made of die-casting aluminum, and the outer surface of the second radiating fin is coated with an aluminum nitride coating.
7. The lcd tv of claim 6, wherein: the utility model provides a sealing plug, the sealing plug is characterized in that the top cap is all provided with on first fin and the second fin, be provided with the division board between first storage tank and the second storage tank, make there is first clearance between every two adjacent first fin and the second fin that set up, the second fin both ends all are provided with the connecting plate, and leave the second clearance between connecting plate and this second fin, the connecting plate has the heat conductivity, all be provided with flexible shell on two connecting plates, flexible shell sets up in the one side that the second fin was kept away from to the relative connecting plate, flexible shell can slide at the top cap lower extreme, set gradually two elastic pieces from the top down along vertical direction in the flexible shell, the elastic piece is the arch structure, initially flexible shell is retrieved to in the second clearance, the elastic piece is compressed this moment, and keep compression state under the effect of division board, extrude flexible shell in the second clearance, make flexible shell have the orientation that is kept away from first fin, inject the filling chamber between two lateral walls of two elastic pieces and flexible shell, the filling chamber intussuseption is filled with grease, set up at least one through-hole on the flexible shell, set up at least one through-hole with the plug is set up to the plug is connected with the plug in the plug, at least one plug is set up to the plug is small in the plug length along the plug, and the plug is set up to the plug.
8. The lcd tv of claim 7, wherein: the upper elastic piece is connected with the upper top wall of the telescopic shell through a first elastic piece, and the initial first elastic piece has a tendency of promoting the upper elastic piece to move downwards.
9. The lcd tv of claim 1, wherein: the heat conducting plate is of an L-shaped structure and comprises a first plate section and a second plate section, the first plate section is perpendicular to the second plate section, the first plate section is in contact with the lamp strip, the second plate section is in contact with a plurality of first heat dissipation groups and a plurality of second heat dissipation groups, and heat energy of the lamp strip can be transferred to the first heat dissipation groups and the second heat dissipation groups through the heat conducting plate.
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| CN116456704B (en) | 2023-08-15 |
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