Liquid crystal display screen with heat dissipation function

Abstract

The invention relates to the technical field of display screens, in particular to a liquid crystal display screen with a heat dissipation function, which comprises a fixing frame, a display, an electric winding drum, a protective film and the like, a display is mounted on the fixing frame; the display is provided with two placing cavities; an electric winding drum is mounted in each placement cavity; a protective film for protecting the display is wound on the two electric winding drums together; the left side and the right side of the display are respectively provided with a through groove, and the two through grooves are respectively communicated with the corresponding placing cavities. Brushing cleaning is conducted on the passing protective film through bristles on a rotating rod, dust attached to the surface of the protective film is brushed down and cleaned, so that follow-up recycling of the protective film is facilitated, a penetrating groove and a through groove are made to be in a perpendicular state again, and therefore the bristles are driven to rotate to be isolated from the outside, the through groove is blocked again, and the protective film is cleaned. And external dust is prevented from being in contact with the bristles, so that the subsequent cleaning effect is not influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of display screens, and in particular to a liquid crystal display screen with a heat dissipation function. Background Art

[0002] In modern society, multimedia LCD screens have become an important carrier of information dissemination in outdoor places such as bus stops and tourist attractions. Such devices can not only display real-time information and play video advertisements, but also significantly improve user participation through integrated touch interaction modules, thereby enhancing the advertising dissemination effect. However, due to the long-term exposure of the device to the outdoors, environmental dust easily accumulates on its surface, and frequent touch interactions lead to residual fingerprint stains. The superposition of multiple pollution sources will gradually reduce the screen transmittance and touch sensitivity. This continuous performance degradation not only affects the visual presentation effect, but also weakens the human-computer interaction experience, and ultimately has a negative impact on information transmission efficiency and user satisfaction. Summary of the invention

[0003] In order to overcome the disadvantages that the display device is exposed to the outdoors for a long time, environmental dust is easily accumulated on its surface, and frequent touch interactions lead to residual fingerprint stains. The superposition of multiple pollution sources will gradually reduce the screen transmittance and touch sensitivity. The present invention provides a liquid crystal display screen with heat dissipation function.

[0004] The technical implementation scheme of the present invention is: a liquid crystal display screen with heat dissipation function, including a fixing frame and a display; the fixing frame is equipped with a display; it also includes an electric winding drum, a protective film, a motor, a rotating rod, bristles and a cleaning unit; the display has two placement cavities; each placement cavity is equipped with an electric winding drum; the two electric winding drums jointly wind up a protective film for protecting the display; the left and right sides of the display are each equipped with a through groove, and the two through grooves are respectively connected to the corresponding placement cavities; each through groove is rotatably connected to a rotating rod; a plurality of motors with the same number as the rotating rods are fixed in the display, and each motor output shaft is respectively fixed to the corresponding rotating rod; each rotating rod has a through groove, and each through groove is fixed with a plurality of bristles; the fixing frame is connected to a cleaning unit for cleaning the protective film.

[0005] Optionally, the cleaning unit includes a liquid storage tank, an infusion tube and a wiping sponge; a wiping sponge is fixedly connected to each placement cavity, and each wiping sponge is in contact with the protective film; a liquid storage tank is detachably connected to each placement cavity, and the liquid storage tank is filled with disinfectant alcohol; each liquid storage tank is connected to an infusion tube, an electric-controlled valve is provided on the infusion tube, and the infusion tube is connected to the inside of the wiping sponge through a plurality of liquid outlets.

[0006] Optionally, it also includes an extrusion plate, an elastic telescopic rod and a pressing plate; a pressing plate is elastically connected to the upper and lower sides of the display; a plurality of elastic telescopic rods are fixedly connected to the upper and lower sides of the display, and the telescopic parts of all the elastic telescopic rods on the same side are fixedly connected to the corresponding pressing plate; a protrusion is provided on the left and right sides of each pressing plate; an extrusion plate is fixedly connected to the upper and lower sides of each rotating rod, and the positions of the extrusion plate and the protrusion correspond to each other.

[0007] Optionally, the upper end of the pressing plate is arranged as an inclined surface sloping downward from the back to the front.

[0008] Optionally, it also includes a cooling fan and a heat sink; a plurality of cooling fans are fixedly connected in the display; a plurality of air inlet holes are opened at positions corresponding to the cooling fans on the rear side of the display; a plurality of heat sinks for heat dissipation are fixedly connected in the display; a plurality of exhaust holes are opened on the partition in the display, and the exhaust holes are connected to the placement cavity; each heat sink is located between two adjacent exhaust holes; a plurality of air outlet holes are opened on the left and right sides of the display, and the air outlet holes are connected to the placement cavity.

[0009] Optionally, a dustproof net is also included; a dustproof net is fixedly connected to the rear side of each cooling fan.

[0010] Optionally, it also includes a sliding block and a wedge block; a sliding block is slidably connected to each of the left and right sides of the display, the sliding block is set to a high-density metal material, each sliding block has a number of through holes, and the through holes correspond to the air outlet holes; a wedge-shaped portion is set on the lower side of each sliding block; each rotating rod is fixed with a wedge block, and the wedge block corresponds to the wedge-shaped portion of the sliding block.

[0011] Optionally, a rain shield is also included; the fixing frame is fixedly connected with the rain shield for shielding and diverting rainwater, and the rain shield is located above the display.

[0012] Optionally, a drainage pipe is also included; a circular collecting groove is opened on the upper edge of the rain shield; a drainage pipe is fixedly connected to the left and right sides of the fixing frame, and all the drainage pipes are connected to the collecting groove.

[0013] Optionally, the distance between the outlet of the drain pipe and the ground is less than .

[0014] The present invention has the following advantages: The bristles on the rotating rod are used to brush and clean the protective film passing through, and the dust attached to the surface of the protective film is brushed off and cleaned, so as to facilitate the subsequent recycling of the protective film; and after the protective film is wound up and switched, the motor is controlled to drive the rotating rod to rotate, so that the through groove and the through groove are vertical again, thereby driving the bristles to rotate and isolate them from the outside world, and re-blocking the through groove to prevent external dust from contacting the bristles and affecting its subsequent cleaning effect.

[0015] The upper and lower ends of the protective film are pressed against the surface of the display screen by a pressing plate, thereby closing the gap between the two and preventing external dust from entering between the display screen and the protective film, thereby reducing the light transmittance and touch sensitivity of the display screen.

[0016] By moving the sliding block upward, the through hole and the air outlet are staggered, and the sliding block blocks the air outlet, so that the heat-dissipating gas is blown out through the through groove, and then the bristles on the through groove are recoiled, and the dust remaining on the bristles is blown off, thereby ensuring the cleaning effect of the bristles for continuous use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure disclosed by the liquid crystal display screen with heat dissipation function of the present invention; Figure 2 It is a schematic diagram of the back structure of the liquid crystal display screen with heat dissipation function disclosed in the present invention; Figure 3 A schematic diagram of the structure inside the display disclosed by the liquid crystal display screen with heat dissipation function of the present invention; Figure 4 A schematic diagram of the combined structure of a display, an electric winding drum, a liquid storage tank, an infusion tube and a wiping sponge disclosed in the liquid crystal display screen with heat dissipation function of the present invention; Figure 5 A schematic diagram of the combined structure of a display, an electric winding drum, a protective film, a motor and a rotating rod disclosed in the liquid crystal display screen with heat dissipation function of the present invention; Figure 6 A schematic diagram of the combined structure of the rotating rod and the brush bristles disclosed in the liquid crystal display screen with heat dissipation function of the present invention; Figure 7 It is a schematic diagram of the combined structure of the rotating rod, the extruding plate, the elastic telescopic rod and the pressing plate disclosed in the liquid crystal display screen with heat dissipation function of the present invention; Figure 8 A schematic diagram of the combined structure of a heat dissipation fan, a heat sink and a dustproof net disclosed by the liquid crystal display screen with heat dissipation function of the present invention; Fig. 9 A state diagram of the sliding block moving to block the air outlet disclosed by the liquid crystal display screen with heat dissipation function of the present invention; Fig.10 It is a schematic diagram of the combined structure of the rotating rod, the sliding block and the wedge block disclosed by the liquid crystal display screen with heat dissipation function of the present invention; Fig.11 The present invention is a schematic diagram of the combined structure of a rain shield and a drain pipe disclosed by the liquid crystal display screen with heat dissipation function.

[0018] The meanings of the reference numerals in the figure are: 1-fixed frame, 2-display, 3-electric winding drum, 4-protective film, 5-motor, 6-rotating rod, 7-bristles, 101-liquid storage tank, 102-infusion tube, 103-wiping sponge, 111-squeezing plate, 112-elastic telescopic rod, 113-pressing plate, 201-cooling fan, 202-heat sink, 203-dustproof net, 211-sliding block, 212-wedge block, 301-rain shield, 302-drain pipe, 01-placing cavity, 02-through groove, 03-air inlet, 04-exhaust hole, 05-air outlet, 601-through groove, 11301-bump, 21101-through hole, 21102-wedge portion, 30101-collecting groove. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0020] Example 1 A liquid crystal display screen with heat dissipation function, such as Figure 1-Figure 7 As shown, it includes a fixing frame 1 and a display 2; the fixing frame 1 is installed with the display 2; It also includes an electric winding drum 3, a protective film 4, a motor 5, a rotating rod 6, bristles 7 and a cleaning unit; the display 2 has two placement cavities 01; each placement cavity 01 is equipped with an electric winding drum 3; the two electric winding drums 3 wind up a protective film 4 together; the left and right sides of the display 2 each have a through slot 02, and the two through slots 02 are respectively connected to the corresponding placement cavity 01; each through slot 02 is rotatably connected to a rotating rod 6; a number of motors 5, the same number as the rotating rod 6, are fixedly connected to the display 2, and the output shaft of each motor 5 is respectively fixedly connected to the corresponding rotating rod 6; each rotating rod 6 has a through slot 601, and each through slot 601 is fixedly connected to a number of bristles 7, the protective film 4 covers the display part on the front side of the display 2, and the two ends respectively pass through the through slot 601 of the rotating rod 6 from the through slot 02, enter the placement cavity 01, and are respectively rolled up in the two electric winding drums 3 in the placement cavity 01; the fixing frame 1 is connected to the cleaning unit.

[0021] The cleaning unit includes a liquid storage tank 101, an infusion tube 102 and a wiping sponge 103; a wiping sponge 103 is fixedly connected in each placement cavity 01, and each wiping sponge 103 is in contact with the protective film 4; a liquid storage tank 101 is bolted in each placement cavity 01, and the liquid storage tank 101 is filled with disinfectant alcohol; each liquid storage tank 101 is connected to an infusion tube 102, an electric control valve is provided on the infusion tube 102, and the infusion tube 102 is connected to the inside of the wiping sponge 103 through a plurality of liquid outlets.

[0022] It also includes an extrusion plate 111, an elastic telescopic rod 112 and a pressing plate 113; a pressing plate 113 is elastically connected to the upper and lower sides of the display 2; a plurality of elastic telescopic rods 112 are fixedly connected to the upper and lower sides of the display 2, and the telescopic parts of all the elastic telescopic rods 112 on the same side are fixedly connected to the corresponding pressing plates 113, and the upper and lower sides of the protective film 4 are covered and pressed by the two pressing plates 113, so as to prevent external dust from entering between the protective film 4 and the display 2 through the gap on the upper or lower side of the protective film 4, thereby affecting the display clarity of the display 2; a protrusion 11301 is respectively arranged on the left and right sides of each pressing plate 113; a extrusion plate 111 is respectively fixedly connected to the upper and lower sides of each rotating rod 6, and the extrusion plate 111 corresponds to the position of the protrusion 11301.

[0023] The upper end of the pressing plate 113 is configured as an inclined surface that slopes downward from the back to the front, so as to guide the dust that falls on the pressing plate 113 and prevent the dust from remaining on the pressing plate 113 .

[0024] When the display screen is working outdoors, environmental dust is easily accumulated on its surface, and frequent touch interactions lead to residual fingerprint stains. The superposition of multiple pollution sources will gradually reduce the screen transmittance and touch sensitivity. Therefore, a protective film 4 is set on the front side of the screen of the display 2, and the screen of the display 2 is covered and protected by the protective film 4 to prevent external dust or fingerprint stains from touch interactions from remaining directly on the screen surface of the display 2, thereby reducing its screen transmittance and touch sensitivity. In addition, when the display 2 is working, one of the electric winding drums 3 is periodically controlled to rotate and rewind the protective film 4, and the other electric winding drum 3 is rotated to release the protective film 4, so that the part of the protective film 4 with residual dust and stains is rolled up and transferred, and the clean part of the protective film 4 is pulled out and re-covered in front of the screen of the display 2, thereby ensuring that the screen transmittance and touch sensitivity are always kept in a good state when the display 2 is working.

[0025] Moreover, initially, the through slot 601 of the rotating rod 6 is oriented perpendicular to the through slot 02, and the through slot 02 is blocked by the rotating rod 6. When the electric winding drum 3 rotates to roll up the protective film 4, the motor 5 is first controlled to drive the rotating rod 6 to rotate, so that the through slot 601 is oriented in the same direction as the through slot 02. Figure 6As shown, the electric winding drum 3 is then controlled to rotate to wind up and unwind the protective film 4; and in the process of winding up the protective film 4, the bristles 7 on the rotating rod 6 are used to brush and clean the protective film 4 passing through the through groove 601, and the dust attached to the surface of the protective film 4 is brushed off, so as to facilitate the subsequent recycling of the protective film 4.

[0026] At the same time, it is taken into consideration that if the bristles 7 are always in contact with the outside world, after long-term use, the dust from the outside world will adhere to the bristles 7, reducing the cleanliness of the bristles 7, and further reducing the cleaning effect of the bristles 7 on the protective film 4. Therefore, when the protective film 4 completes the winding and switching, the motor 5 is then controlled to drive the rotating rod 6 to rotate, so that the through groove 601 and the through groove 02 are in a vertical state again, thereby driving the bristles 7 to rotate and isolate them from the outside world, and re-blocking the through groove 02 to prevent the dust from the outside world from contacting the bristles 7 and affecting its subsequent cleaning effect; and the motor 5 on the left side is controlled to drive the rotating rod 6 to rotate clockwise when viewed from top to bottom, and the motor 5 on the right side is controlled to drive the rotating rod 6 to rotate counterclockwise when viewed from top to bottom, and the rotating rods 6 on both sides are rotated in opposite directions, thereby tightening the part of the protective film 4 covering the front of the screen of the display 2 to prevent it from wrinkling during the winding and switching process and affecting the light transmittance of the screen of the display 2.

[0027] Secondly, when the dust on the surface of the protective film 4 is brushed off and cleaned by the bristles 7, there are still residual fingerprints on the surface of the protective film 4, which are easily cross-contaminated when subsequently rolled up into the electric winding drum 3. Therefore, in the process of rolling up and switching the protective film 4, the electric control valve on the infusion tube 102 is controlled to open at the same time, and the disinfecting alcohol in the storage tank 101 is transported to the wiping sponge 103 through the infusion tube 102. When the protective film 4 is cleaned by the bristles 7 and enters the placement cavity 01, the protective film 4 passes through the wiping sponge 103, and the surface of the protective film 4 is wiped and disinfected by the wiping sponge 103. The disinfected protective film 4 is finally rolled up into the electric winding drum 3, thereby avoiding the problem of cross-contamination between the rolled-up protective films 4.

[0028] It is also considered that when the protective film 4 is pulled out to cover the surface of the screen of the display 2, there is a gap between the upper and lower ends of the protective film 4 and the screen of the display 2, and external dust can easily enter between the screen of the display 2 and the protective film 4 through the gap, thereby reducing the light transmittance and touch sensitivity of the screen of the display 2; therefore, when the protective film 4 covers the surface of the screen of the display 2, the pressing plate 113 presses the upper and lower ends of the protective film 4 to fit the surface of the screen of the display 2 under the action of the elastic telescopic rod 112, thereby closing the gap between the two, preventing external dust from entering between the screen of the display 2 and the protective film 4, and reducing the light transmittance and touch sensitivity of the screen of the display 2; and, when the rewinding and switching are required, When the protective film 4 is rolled up, the motor 5 drives the rotating rod 6 to rotate, and the rotating rod 6 drives the squeezing plate 111 to rotate. The squeezing plate 111 rotates to squeeze the protrusion 11301 of the pressing plate 113, pushing the pressing plate 113 to move and separate from the screen of the display 2, and the elastic telescopic rod 112 is stretched, thereby stopping the pressing on the upper and lower ends of the protective film 4. When the winding and switching of the protective film 4 is completed, the motor 5 drives the rotating rod 6 to rotate and reset, the squeezing plate 111 stops squeezing the protrusion 11301, and the pressing plate 113 is reset under the action of the elastic telescopic rod 112, and continues to press the upper and lower ends of the protective film 4 to prevent external dust from entering and affecting the light transmittance and touch sensitivity of the screen of the display 2.

[0029] In addition, the upper end of the pressing plate 113 is set as a slope sloping downward from the back to the front, which can guide the dust falling on the pressing plate 113 to prevent the dust from remaining on the pressing plate 113. When the pressing plate 113 is subsequently moved and opened, the dust is prevented from falling directly between the protective film 4 and the display 2 screen.

[0030] Example 2 On the basis of Example 1, Figure 3 and Figure 8-Figure 10 As shown, it also includes a cooling fan 201 and a heat sink 202; two cooling fans 201 are fixedly connected to the display 2; a plurality of air inlet holes 03 are opened at positions corresponding to the cooling fans 201 on the rear side of the display 2; a plurality of heat sinks 202 are fixedly connected to the display 2; a plurality of exhaust holes 04 are opened on the partition plate in the display 2, and the exhaust holes 04 are connected to the placement cavity 01; each heat sink 202 is located between two adjacent exhaust holes 04; a plurality of air outlet holes 05 are opened on the left and right sides of the display 2, and the air outlet holes 05 are connected to the placement cavity 01.

[0031] A dustproof net 203 is also included; each cooling fan 201 is fixedly connected to a dustproof net 203 on the rear side, through which the blown gas can be filtered to isolate the dust in the gas, thereby preventing external dust from entering the display 2 and affecting the normal operation of the display 2.

[0032] It also includes a sliding block 211 and a wedge block 212; a sliding block 211 is slidably connected to the left and right sides of the display 2, and the sliding block 211 is set to a high-density metal material. Each sliding block 211 has a plurality of through holes 21101, and the through holes 21101 correspond to the air outlet 05; a wedge portion 21102 is set on the lower side of each sliding block 211; each rotating rod 6 is fixedly connected to a wedge block 212, and the wedge block 212 corresponds to the wedge portion 21102 of the sliding block 211.

[0033] When the display screen is working, a fan is usually set to dissipate heat for the display screen to prevent the working temperature from being too high, which may cause bulging, leakage, and failure of other key components of the electronic components inside the display screen. Therefore, when the display 2 is working, the cooling fan 201 is controlled to work at the same time, driving the external air flow to enter the display 2 from the air inlet 03, contact the internal heat sink 202, and pass through the exhaust hole 04 and the placement cavity 01 in turn, and be discharged to the outside from the air outlet 05; the heat generated by the display 2 during operation is transferred to the heat sink 202, and the air flow is driven by the cooling fan 201, and contact the heat sink 202, so as to take away the heat transferred to the heat sink 202, thereby dissipating the heat of the display 2.

[0034] At the same time, as the bristles 7 continue to brush and clean, the cleaned dust will gradually accumulate on the bristles 7, resulting in a decrease in the cleaning effect of the bristles 7, thereby affecting the cleaning efficiency of the protective film 4; therefore, when the motor 5 drives the rotating rod 6 to rotate so that the through groove 601 is aligned with the through groove 02 and the protective film 4 is wound up, the rotating rod 6 simultaneously drives the wedge block 212 to rotate and push the wedge-shaped portion 21102 of the sliding block 211, so that the sliding block 211 moves upward, the through hole 21101 is staggered with the air outlet 05, and the sliding block 211 blocks the air outlet 05, which prevents the gas that passes through the exhaust hole 04 and enters the placement cavity 01 from being discharged to the outside through the air outlet 05 during the heat dissipation process. Boundary, and at this time, the through groove 601 is oriented in the same direction as the through groove 02, and the through groove 601 is connected with the placement chamber 01. As the cooling fan 201 continues to rotate and work, the gas entering the placement chamber 01 is blown out from the through groove 601 under the action of air pressure, and then the bristles 7 on the through groove 601 are recoiled, and the dust remaining on the bristles 7 is blown off, thereby ensuring the cleaning effect of the bristles 7 for continuous use; when the winding and switching of the protective film 4 is completed, the rotating rod 6 rotates and resets, and the rotating rod 6 drives the wedge block 212 to rotate and reset, and stops pushing and squeezing the sliding block 211. The sliding block 211 resets under the action of its own gravity, so that the through hole 21101 is aligned and connected with the air outlet 05 again.

[0035] It should be noted that the power of the cooling fan 201 can be intelligently controlled. During normal cooling, the cooling fan 201 is controlled to operate at a lower power to reduce energy consumption during the cooling process. When the air outlet 05 is blocked and the bristles 7 are cleaned, the cooling fan 201 is controlled to operate at a higher power to provide a stronger airflow to clean the bristles 7, thereby ensuring the cleaning effect of the bristles 7.

[0036] Example 3 On the basis of Example 2, Figure 1 and Fig.11 As shown, a rain shield 301 is also included; the fixing frame 1 is fixedly connected with the rain shield 301 , and the rain shield 301 is located above the display 2 .

[0037] It also includes a drainage pipe 302; a round-shaped collecting groove 30101 is opened on the upper edge of the rain shield 301; a drainage pipe 302 is fixedly connected to the left and right sides of the fixing frame 1, and all the drainage pipes 302 are connected to the collecting groove 30101.

[0038] The pipe opening of the drainage pipe 302 is located less than 10 m from the ground to prevent splashing during drainage, which would affect nearby pedestrians.

[0039] Considering that the display screen is set in an outdoor environment, by setting a rain shield 301 above the display 2, the display 2 can be shielded from rain to prevent rain from falling directly on the display 2 and affecting the normal use of the display 2; at the same time, considering that if the rain on the upper side of the rain shield 301 flows down from the edge of the rain shield 301, a water curtain will be formed in front of the display 2, which will make it inconvenient for the user to observe the display content of the display 2 and hinder the user's interactive use of the display 2. Therefore, a circular collecting groove 30101 is opened on the rain shield 301. In the process of the rain shield 301 shielding the rain, the rain on the upper side of the rain shield 301 can be guided to flow into the collecting groove 30101 and discharged through the drain pipe 302, thereby preventing the blocked rain from flowing down from the edge of the rain shield 301 and forming a water curtain in front of the display 2, reducing the clarity of the display 2 and hindering the use of the display 2 by surrounding users; and the pipe mouth of the drain pipe 302 is less than 10m away from the ground to prevent splashing during drainage and affect surrounding pedestrians.

[0040] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid crystal display screen with a heat dissipation function, comprising a fixing frame (1); a display (2) is mounted on the fixing frame (1); the characteristics are: The display (2) has two placement cavities (01); each placement cavity (01) is provided with an electric winding drum (3); the two electric winding drums (3) jointly wind up a protective film (4) for protecting the display (2); a through slot (02) is provided on the left and right sides of the display (2), and the two through slots (02) are respectively connected to the corresponding placement cavities (01); each through slot (02) is rotatably connected to a rotating rod (6); a plurality of motors (5) having the same number as the rotating rods (6) are fixedly connected to the display (2), and the output shaft of each motor (5) is respectively fixedly connected to the corresponding rotating rod (6); each rotating rod (6) has a through slot (601), and each through slot (601) is fixedly connected to a plurality of brushes (7); the fixing frame (1) is connected to a cleaning unit for cleaning the protective film (4).

2. The liquid crystal display screen with heat dissipation function according to claim 1, characterized in that: The cleaning unit comprises a wiping sponge (103); each placement cavity (01) is fixedly connected with a wiping sponge (103), and each wiping sponge (103) is in contact with a protective film (4); each placement cavity (01) is detachably connected with a liquid storage tank (101), and the liquid storage tank (101) is filled with disinfectant alcohol; each liquid storage tank (101) is connected with an infusion tube (102), and an electric control valve is provided on the infusion tube (102), and the infusion tube (102) is connected with the inside of the wiping sponge (103) through a plurality of liquid outlets.

3. The liquid crystal display screen with heat dissipation function according to claim 2, characterized in that: It also comprises a pressing plate (113); the upper side and the lower side of the display (2) are each elastically connected to a pressing plate (113); the upper side and the lower side of the display (2) are each fixedly connected to a plurality of elastic telescopic rods (112), and the telescopic parts of all the elastic telescopic rods (112) on the same side are fixedly connected to the corresponding pressing plate (113); a convex block (11301) is respectively arranged on the left side and the right side of each pressing plate (113); and a pressing plate (111) is respectively fixedly connected to the upper side and the lower side of each rotating rod (6), and the positions of the pressing plates (111) and the convex blocks (11301) correspond to each other.

4. The liquid crystal display screen with heat dissipation function according to claim 3, characterized in that: The upper end of the pressing plate (113) is arranged as an inclined surface which inclines downward from the back to the front.

5. The liquid crystal display screen with heat dissipation function according to claim 1, characterized in that: The display (2) also comprises a heat dissipation fan (201); a plurality of heat dissipation fans (201) are fixedly connected inside the display (2); a plurality of air inlet holes (03) are opened at positions corresponding to the heat dissipation fans (201) on the rear side of the display (2); a plurality of heat sinks (202) for heat dissipation are fixedly connected inside the display (2); a plurality of exhaust holes (04) are opened on a partition plate inside the display (2), and the exhaust holes (04) are connected to the placement cavity (01); each heat sink (202) is located between two adjacent exhaust holes (04); a plurality of air outlet holes (05) are opened on the left and right sides of the display (2), and the air outlet holes (05) are connected to the placement cavity (01).

6. The liquid crystal display screen with heat dissipation function according to claim 5, characterized in that: A dustproof net (203) is also included; a dustproof net (203) is fixedly connected to the rear side of each cooling fan (201).

7. A liquid crystal display screen with heat dissipation function according to any one of claims 5-6, characterized in that: The invention also comprises a sliding block (211); the left side and the right side of the display (2) are each slidably connected to a sliding block (211); the sliding block (211) is made of a high-density metal material; each sliding block (211) is provided with a plurality of through holes (21101), and the through holes (21101) correspond to the air outlet holes (05); a wedge-shaped portion (21102) is provided on the lower side of each sliding block (211); each rotating rod (6) is fixedly connected to a wedge-shaped block (212), and the wedge-shaped block (212) corresponds to the wedge-shaped portion (21102) of the sliding block (211).

8. The liquid crystal display screen with heat dissipation function according to claim 1, characterized in that: It also includes a rain shield (301); the fixing frame (1) is fixedly connected with the rain shield (301) for shielding and diverting rainwater, and the rain shield (301) is located above the display (2).

9. The liquid crystal display screen with heat dissipation function according to claim 8, characterized in that: It also includes a drainage pipe (302); a circular collecting groove (30101) is provided on the upper edge of the rain shield (301); a drainage pipe (302) is fixedly connected to the left and right sides of the fixing frame (1), and all the drainage pipes (302) are connected to the collecting groove (30101).

10. The liquid crystal display screen with heat dissipation function according to claim 9, characterized in that: The distance between the outlet of the drainage pipe (302) and the ground is less than .

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