CN107743352B - Vehicle-mounted LED electronic double-display - Google Patents
Vehicle-mounted LED electronic double-display Download PDFInfo
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- CN107743352B CN107743352B CN201710975417.3A CN201710975417A CN107743352B CN 107743352 B CN107743352 B CN 107743352B CN 201710975417 A CN201710975417 A CN 201710975417A CN 107743352 B CN107743352 B CN 107743352B
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- 238000005192 partition Methods 0.000 claims description 21
- 230000009977 dual effect Effects 0.000 claims description 14
- 230000000694 effects Effects 0.000 abstract description 6
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920001690 polydopamine Polymers 0.000 description 1
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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
- H05K7/20954—Modifications to facilitate cooling, ventilating, or heating for display panels
- H05K7/20972—Forced ventilation, e.g. on heat dissipaters coupled to components
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
-
- 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
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/202—Air circulating in closed loop within enclosure wherein heat is removed through heat-exchangers
-
- 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
- H05K7/20954—Modifications to facilitate cooling, ventilating, or heating for display panels
- H05K7/20963—Heat transfer by conduction from internal heat source to heat radiating structure
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Thermal Sciences (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
Abstract
The invention discloses a vehicle-mounted LED electronic double display, which comprises an electronic display, a transparent plate, a heat conducting plate, an open airflow channel, a closed circulating airflow channel, an airflow accelerator, a shell part and the like, wherein the heat dissipation effect of the display is enhanced on the premise of not influencing the display effect of the LED electronic double display, and the service life of the display is prolonged.
Description
Technical Field
The invention relates to the technical field of electronic displays, in particular to a vehicle-mounted LED electronic double display.
Background
An LED electronic display is a display screen which is used for displaying various information such as characters, figures, images, animation, quotation, videos, video signals and the like by controlling the display mode of a semiconductor light-emitting diode. The technological progress of LEDs is the greatest driving force to expand market demand and applications. Originally, LED is only used as a micro indicator light, and is applied to high-grade equipment such as computers, audio and video recorders, and with the continuous progress of large-scale integrated circuits and computer technologies, LED displays are growing up rapidly, and gradually expanding to the fields of stock tickers, digital cameras, PDAs, mobile phones, and the like. The LED display integrates the micro-electronic technology, the computer technology and the information processing, becomes a new generation of display media with most advantages due to the advantages of bright color, wide dynamic range, high brightness, long service life, stable and reliable work and the like, and is widely applied to large squares, commercial advertisements, stadiums, information dissemination, news distribution, stock exchange and the like.
However, because the LED semiconductor generates a large amount of heat during operation, if the LED semiconductor cannot be evacuated in time or is improperly evacuated, the display effect of the LED electronic display will be directly affected, and serious people will directly damage the display and other devices.
Disclosure of Invention
The invention aims to solve the defects of the prior art, provides a vehicle-mounted LED electronic double-display device which is used for bidirectional display in a vehicle, enhances the heat dissipation effect of the display device on the premise of not influencing the display effect of the LED electronic double-display device, prolongs the service life of the display device, and improves the safety of the LED electronic double-display device in the using process of the vehicle-mounted LED electronic double-display device.
In order to realize the aim of the invention, the technical measures are as follows:
the vehicle-mounted LED electronic double display comprises: electronic display, transparent plate, heat-conducting plate, open air current passageway, closed circulation air current passageway, air current accelerator and shell spare etc:
the electronic display includes: the first electronic display and the second display are fixed in a back direction;
the transparent plate includes: first and second transparent plates respectively fixed to the first and second electronic displays
The display is arranged in front of the display end;
a heat conducting plate: the first heat conducting plate and the second heat conducting plate are respectively arranged behind the first electronic display and the second electronic display;
open airflow channel: the first heat conducting plate and the second heat conducting plate are arranged between the first heat conducting plate and the second heat conducting plate;
closed circulation gas flow channel: the first electronic board is arranged between the first transparent board and the first electronic display
A first circulation airflow channel formed between the display and the first heat-conducting plate, a second transparent plate and
the first electronic display, the second electronic display and the second heat conducting plate
Two circulating airflow channels, the first circulating airflow channel and the second circulating airflow channel are communicated through an intercommunication pipe
The first circulating airflow channel, the second circulating airflow channel and the communicating pipe form closed circulating gas
A flow channel;
an airflow accelerator: comprises a first airflow accelerator, a second airflow accelerator arranged in a closed cycle
An inter-communicating tube surrounding the gas flow passage;
the shell part is as follows: for electronic display, transparent plate, open airflow channel, and closed circulation gas
The flow channel is fixed on a housing member of the vehicle, and the housing member surrounds the first and second transparent plates and the first transparent plate
And the second electronic display, the first heat-conducting plate and the periphery of the second heat-conducting plate to ensure that the transparent plate and the display are in contact
A closed circulating airflow channel is formed between the first heat conducting plate and the second heat conducting plate
Forming an open airflow channel.
According to the vehicle-mounted LED electronic double display, the intercommunicating pipe is positioned at the top of the closed type circulating airflow channel, the vehicle-mounted LED electronic double display is in mirror symmetry with the center of the intercommunicating pipe of the closed type circulating airflow channel, and vertical parts of the vehicle-mounted LED electronic double display are mutually restrained through the top of the closed type circulating airflow channel and are fixed on a vehicle body.
The invention discloses a vehicle-mounted LED electronic double display, wherein a closed circulating airflow channel is formed by a shell member, a transparent plate, a display and a heat conducting plate, wherein the first transparent plate and the first display form a first A cavity, a first B cavity is formed between the first display and the first heat conducting plate, the second transparent plate and the second display form a second A cavity, a second B cavity is formed between the second display and the second heat conducting plate, and the upper part and the lower part of the A cavity and the lower part of the B cavity are respectively provided with an air channel which is respectively used for conducting airflow between the first A cavity and the first B cavity and conducting airflow between the second A cavity and the second B cavity.
According to the vehicle-mounted LED electronic double display, air flow between the first A cavity and the first B cavity is conducted to form first air flow, air flow between the second A cavity and the second B cavity is conducted to form second air flow, and the flow directions of the first air flow and the second air flow are vertical to the horizontal plane and respectively surround the first display and the second display.
According to the vehicle-mounted LED electronic double display, the closed communicating pipe between the first cavity B and the second cavity B is arranged at the upper parts of the first cavity B and the second cavity B, and the first airflow accelerator and the second airflow accelerator are arranged in the communicating pipe of the closed circulating airflow channel in a back-to-back mode.
According to the vehicle-mounted LED electronic double display, the heights of the first airflow accelerator and the second airflow accelerator are respectively H, the height of the communicating pipe of the closed type circulating airflow channel is H, and H is not less than 3/2H and not more than 3H.
The invention discloses a vehicle-mounted LED electronic double display, wherein two clapboards are arranged in an intercommunicating pipe of a closed circulating airflow channel, the two clapboards are separated into a hollow cavity in the middle of the intercommunicating pipe, two sides of the intercommunicating pipe are respectively divided into an upper cavity and a lower cavity by the two clapboards, the upper cavity and the lower cavity comprise a first upper cavity, a first lower cavity, a second upper cavity and a second lower cavity, and a first airflow accelerator and a second airflow accelerator are respectively arranged in the first lower cavity and the second lower cavity.
The invention relates to a vehicle-mounted LED electronic double display, wherein the side surface of a partition plate in an intercommunicating pipe is hermetically connected with the side wall of the intercommunicating pipe, the partition plate is a fan-shaped partition plate, and fan-shaped protruding spokes are arranged on the upper surface and the lower surface of the partition plate.
The vehicle-mounted LED electronic double display further comprises an airflow accelerator in the open airflow channel, and the airflow direction in the open airflow channel is perpendicular to the heat conducting plate.
The invention at least comprises the following beneficial effects:
the invention discloses a vehicle-mounted LED electronic double display, which comprises a shell part, a display, a transparent plate and a heat conducting plate, wherein a closed circulating airflow channel is formed by the shell part, the display, the transparent plate and the heat conducting plate, airflow in a closed loop continuously circularly flows from the front side of the display to the back side of the display in the running process of the LED electronic display by utilizing an airflow heat exchange principle, heat is transmitted to the heat conducting plate in the process of continuous directional circulating flow of the airflow, the heat conducting plate after heat absorption can timely and quickly disperse the heat into outside airflow by utilizing an open airflow channel, and on the other hand, the first A cavity and the first B cavity as well as the second A cavity and the second B cavity are respectively provided with an air channel from top to bottom, and the air channels are respectively used for airflow conduction between the first A cavity and the first B cavity and airflow conduction between. The airflow in the closed circulating airflow channel is fully contacted with the display, so that the heat energy of the display is evacuated from the contact area of the airflow and a heat source; on the other hand, a first airflow accelerator and a second airflow accelerator are arranged in the communicating pipe of the closed type circulating airflow channel and are respectively used for accelerating the airflow in the closed type circulating airflow channel, so that the heat dissipation of the display is improved in the aspect of improving the airflow speed.
According to the vehicle-mounted LED electronic double-display, the closed circulating airflow channel is utilized, so that heat in the working process of the display can be LED out in time, the display can be prevented from being in direct contact with the external environment, the display belongs to a sensitive device, any trace or small amount of dust, H2O and other pollutants can affect the display, the closed circulating airflow channel is utilized to directly isolate the influence of the external environment, airflow, dust and the like on the display, and the service life of the display is prolonged.
According to the vehicle-mounted LED electronic double display, the centers of the intercommunicating pipes of the closed type circulating airflow channels are in mirror symmetry, the vertical parts of the vehicle-mounted LED electronic double display are symmetrically restrained at the center parts of the intercommunicating pipes by utilizing the closed type circulating airflow channels, particularly the tops of the closed type circulating airflow channels, the two electronic display screens cannot shake after the tops of the closed type circulating airflow channels are fixed on a vehicle body, and the LED electronic double display can be firmly fixed on the vehicle body even under the action of external force.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
The drawings are included to further explain the present invention and are not intended to limit the scope of the invention.
Fig. 1 is a simplified schematic diagram of the vehicle-mounted LED electronic dual display without the housing member according to the present invention.
Fig. 2 is a schematic side sectional view of the non-interconnected pipe vehicle-mounted LED electronic dual display according to the present invention.
FIG. 3 is a schematic side sectional view of a vehicle-mounted LED electronic dual display with an airflow accelerator according to the present invention.
FIG. 4 is a schematic top sectional view of an intercommunicating duct with an airflow accelerator according to the present invention.
FIG. 5 is a schematic top view of a cross-sectional structure of an intercommunicating duct with an airflow accelerator and a partition according to the present invention.
FIG. 6 is a schematic side sectional view of the vehicle LED electronic dual display according to the present invention.
Detailed Description
The present invention is further described in detail below with reference to specific embodiments so that those skilled in the art can implement the invention without limiting the scope of the invention by referring to the description text.
In this specification, when an element is referred to as being "secured to" another element, it can be "directly" connected to the other element or "indirectly" connected to the other element, or be secured to the other element without being connected. The closed circulating airflow channel is a channel which does not exchange air with the outside, the channel is a sealed channel, and the airflow in the channel is in a regular circulating flow state. The open airflow channel is an airflow channel communicated with the external environment, or is directly integrated into the external environment, or at least must be capable of exchanging air with the external environment.
Example 1
As shown in fig. 1, the first electronic display 21 and the second electronic display 22 are fixed back to form a bidirectional LED electronic display, the first transparent plate 11 is disposed in front of the display end of the first electronic display 21, the first heat conducting plate 31 is disposed behind the first electronic display 21, the first transparent plate 12 is disposed in front of the display end of the first electronic display 22, and the first heat conducting plate 32 is disposed behind the first electronic display 22. As shown in fig. 2, the first transparent board 11 and the first display 21 form a first a cavity 41, a first B cavity 51 is formed between the first display 21 and the first heat conducting board 31, the second transparent board 12 and the second display 22 form a second a cavity 42, a second B cavity 52 is formed between the second display 22 and the second heat conducting board 32, gas channels are respectively disposed above and below the a cavity and the B cavity, the first AB cavity upper gas channel 61 and the first AB cavity lower gas channel 71 are respectively used for conducting gas flows between the first a cavity 41 and the first B cavity 51, and the second AB cavity upper gas channel 62 and the second AB cavity lower gas channel 72 are respectively used for conducting gas flows between the second a cavity 42 and the second B cavity 52. The first cavity A, the first cavity B and the shell member 9 form a first AB closed type circulating airflow channel cavity, wherein the first AB cavity upper air channel 61, the first AB cavity lower air channel 71 enable the flow direction 81 of the first airflow in the first AB closed type circulating airflow channel cavity, the second cavity A and the second cavity B form a second AB closed type circulating airflow channel cavity, the second AB cavity upper air channel 62 and the second AB cavity lower air channel 72 enable the flow direction 82 of the second airflow in the second AB closed type circulating airflow channel cavity, the flow directions 81 and 82 in the closed type circulating airflow channel cavities enable the cooling air in the first cavity B51 and the second cavity B52 to respectively flow through the first AB cavity lower air channel 71 and the second AB cavity lower air channel 72, respectively flow into the first cavity A41, the second cavity A42, the display end front of the first electronic display 21 and the display end front of the second electronic display 22 to be fully contacted, after heat released by the display end is absorbed, the heat is released from the first cavity B51 and the second cavity B52 through the first cavity AB upper gas channel 61 and the second cavity AB upper gas channel 62, and airflow in the closed type circulating airflow channel cavity circularly and repeatedly flows around the display in the process of continuously absorbing and releasing the heat.
Example 2
As shown in fig. 3, a closed communicating pipe 1 is arranged between the first B cavity 51 and the second B cavity 52, the communicating pipe 1 is arranged between the first AB cavity upper gas channel 61 and the second AB cavity upper gas channel 62, the first AB cavity upper gas channel 61 and the second AB cavity upper gas channel 62 are communicated with each other, two airflow accelerators 2 fixed back to each other are arranged in the communicating pipe 1, the airflow accelerators 2 accelerate airflow in two directions, when the display is in operation, the airflow accelerator 2 accelerates the airflow in the communicating pipe 1 as shown in fig. 4, because the left and right sides between the first a cavity 41 and the first B cavity 51, and between the second a cavity 42 and the second B cavity 52 are sealed, the flowing direction 81 of the first airflow in the first AB closed circulating airflow channel cavity and the flowing direction 82 of the second airflow in the second AB closed circulating airflow channel cavity are kept unchanged according to the thermal rise and fall of the airflow, but the faster the airflow flows, the faster the speed of the airflow in the closed circulating airflow channel cavity for absorbing and releasing heat is, so that the working temperature of the display is reduced more quickly. In order to further reduce the working temperature of the LED electronic dual display and to cool the surface of the display more uniformly, as shown in fig. 5, two partition plates, namely a first partition plate 0121 and a second partition plate 0122, are arranged in the intercommunicating pipe at the top of the closed circulating airflow channel of the vehicle-mounted LED electronic dual display, the side surfaces of the partition plates are hermetically connected with the side walls of the intercommunicating pipe, the two partition plates are separated into a hollow cavity 01 in the middle of the intercommunicating pipe, the partition plates are fan-shaped partition plates, and fan-shaped protruding spokes 0123 are arranged on the upper and lower surfaces of the partition plates. As shown in fig. 6, two partitions separate two sides of the communicating tube into an upper chamber and a lower chamber, respectively, including a first upper chamber 0141, a first lower chamber 0131, a second upper chamber 0142, and a second lower chamber 0132, and the first airflow accelerator and the second airflow accelerator are disposed in the first lower chamber 0131 and the second lower chamber 0132, respectively.
When the vehicle-mounted LED electronic double-display is in a working state, hot air in the first cavity A41 vertically rises to enter the first cavity B51, after air flow is cooled, the hot air is introduced into the first upper cavity 0141 of the intercommunicating pipe of the closed type circulating air flow channel through spokes 0123 on the upper surface of the first clapboard 0121, then flows into the two clapboards to be separated into a hollow cavity 01 in the middle of the intercommunicating pipe, and is accelerated by the airflow accelerator 2, introduced into the first lower cavity 0131 through spokes 0123 on the lower surface of the first clapboard 0121, and enters the first cavity A41 to circularly absorb heat on the surface of the display screen. The hot air in the second cavity a 42 vertically rises to enter the second cavity B52, after cooling, the air flow is introduced into the first upper cavity 0142 of the intercommunicating pipe of the closed circulating air flow channel by the spokes 0123 on the upper surface of the second partition 0122, then flows into the two partitions to be cut off into the hollow cavity 01 in the middle of the intercommunicating pipe, and is led out of the second lower cavity 0132 by the spokes 0123 on the lower surface of the second partition 0122 after being accelerated by the airflow accelerator 2, and enters the second cavity a 42 to circularly absorb the heat on the surface of the display screen.
It is obvious that those skilled in the art can obtain various effects not directly mentioned according to the respective embodiments without trouble from various structures according to the embodiments of the present invention.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (7)
1. An on-vehicle LED electronic dual display, comprising: electronic display, transparent plate, heat-conducting plate, open air current passageway, closed circulation air current passageway, air current accelerator and shell part:
the electronic display includes: the first electronic display and the second display are fixed in a back direction;
the transparent plate includes: the first transparent plate and the second transparent plate are respectively fixed in front of the display ends of the first electronic display and the second display;
a heat conducting plate: the first heat conducting plate and the second heat conducting plate are respectively arranged behind the first electronic display and the second electronic display;
open airflow channel: the first heat conducting plate and the second heat conducting plate are arranged between the first heat conducting plate and the second heat conducting plate;
closed circulation gas flow channel: a first circulating airflow channel is formed between the first transparent plate and the first electronic display, between the first electronic display and the first heat-conducting plate, a second circulating airflow channel is formed between the second transparent plate and the second electronic display, between the second electronic display and the second heat-conducting plate, the first circulating airflow channel is communicated with the second circulating airflow channel through an intercommunication pipe, and the first circulating airflow channel, the second circulating airflow channel and the intercommunication pipe form a closed circulating airflow channel; two clapboards are arranged in the intercommunicating pipe of the closed type circulating airflow channel, the two clapboards are separated into a hollow cavity in the middle of the intercommunicating pipe, the two clapboards divide the two sides of the intercommunicating pipe into an upper cavity and a lower cavity respectively, the upper cavity and the lower cavity comprise a first upper cavity, a first lower cavity, a second upper cavity and a second lower cavity, and a first airflow accelerator and a second airflow accelerator are respectively arranged in the first lower cavity and the second lower cavity; the side surface of the partition board in the communicating pipe is hermetically connected with the side wall of the communicating pipe, the partition board is a fan-shaped partition board, and fan-shaped protruding spokes are arranged on the upper surface and the lower surface of the partition board;
an airflow accelerator: the device comprises a first airflow accelerator and a second airflow accelerator which are arranged in an intercommunicating pipe of a closed circulating airflow channel;
the shell part is as follows: the shell piece surrounds the peripheries of the first and second transparent plates, the first and second electronic displays, the first heat conducting plate and the second heat conducting plate, so that a closed circulating airflow channel is formed between the transparent plates, the display and the heat conducting plates, and an open airflow channel is formed between the first heat conducting plate and the second heat conducting plate.
2. The vehicle-mounted LED electronic dual display as claimed in claim 1, wherein the communicating tube is located at the top of the closed circulating airflow channel, the vehicle-mounted LED electronic dual display is mirror-symmetrical at the center of the communicating tube of the closed circulating airflow channel, and the vertical components of the vehicle-mounted LED electronic dual display are mutually restrained by the top of the closed circulating airflow channel and fixed on the vehicle body.
3. The on-vehicle LED electronic dual display of claim 1, wherein the housing member forms a closed circulating airflow channel with the transparent plate, the display, and the heat conducting plate, wherein the first transparent plate forms a first a-chamber with the first display, a first B-chamber is formed between the first display and the first heat conducting plate, a second transparent plate forms a second a-chamber with the second display, a second B-chamber is formed between the second display and the second heat conducting plate, and the air channels are respectively disposed above and below the a-chamber and the B-chamber for airflow communication between the first a-chamber and the first B-chamber and airflow communication between the second a-chamber and the second B-chamber.
4. The on-vehicle LED electronic dual display of claim 3, wherein the airflow communication between the first A cavity and the first B cavity forms a first airflow, the airflow communication between the second A cavity and the second B cavity forms a second airflow, and the first airflow and the second airflow are vertical to the horizontal plane and respectively surround the first display and the second display.
5. The vehicular LED electronic dual display device according to claim 4, wherein the closed communicating pipe between the first cavity B and the second cavity B is arranged above the first cavity B and the second cavity B, and the first airflow accelerator and the second airflow accelerator are oppositely arranged in the communicating pipe of the closed circulating airflow channel.
6. The vehicle-mounted LED electronic double display device according to claim 5, wherein the heights of the first airflow accelerator and the second airflow accelerator are H, respectively, the height of the communicating pipe of the closed type circulating airflow channel is H, and H is greater than or equal to 3/2H and less than or equal to 3H.
7. The vehicle-mounted LED electronic dual display of claim 1, wherein the open airflow channel further comprises an airflow accelerator, and the airflow direction in the open airflow channel is perpendicular to the heat conducting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710975417.3A CN107743352B (en) | 2017-10-16 | 2017-10-16 | Vehicle-mounted LED electronic double-display |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710975417.3A CN107743352B (en) | 2017-10-16 | 2017-10-16 | Vehicle-mounted LED electronic double-display |
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| CN107743352A CN107743352A (en) | 2018-02-27 |
| CN107743352B true CN107743352B (en) | 2020-06-30 |
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| CN113984229B (en) * | 2021-12-01 | 2025-08-15 | 郑州椿长仪器仪表有限公司 | High-precision bimetal thermometer |
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| CN107743352A (en) | 2018-02-27 |
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Effective date of registration: 20240207 Address after: 315012 room 1025, Liyuan North Road, Haishu District, Ningbo, Zhejiang, China, 755 Patentee after: Ningbo yuanzhicube Energy Technology Co.,Ltd. Country or region after: China Address before: 530012 room 705, unit 3, building 2, No.1 Renmin East Road, Xingning District, Nanning City, Guangxi Zhuang Autonomous Region Patentee before: GUANGXI NANNING YINGFANDA TECHNOLOGY CO.,LTD. Country or region before: China |