Heat dissipation method and laser projection equipment

Abstract

The embodiment of the invention belongs to the display technology, and provides a heat dissipation method and laser projection equipment, and the laser projection equipment comprises a shell, a laser assembly located in the shell, a heat dissipation assembly located on one side of the laser assembly and used for dissipating heat of the laser assembly, and a heating assembly used for heating air in the shell. And when the environment temperature is within the first preset temperature range, the heating assembly is controlled to heat the air entering the shell, the temperature of the air in the shell is increased, and therefore the medium in the heat conduction pipe can be unfrozen when the medium in the heat conduction pipe in the heat dissipation assembly is frozen. After the preset time, whether the medium in the heat conduction pipe is frozen or not is detected, if yes, the heating assembly is controlled to increase the heating temperature of the air entering the shell so that the medium in the heat conduction pipe can be unfrozen continuously, and if not, the heating assembly is controlled to keep the heating temperature of the air in the shell so that the medium in the heat conduction pipe can be prevented from being frozen again; therefore, normal heat dissipation of the heat conduction pipe can be guaranteed, and normal operation of equipment is guaranteed.

Description

Technical Field

[0001] The embodiments of the present application relate to display technology, and more specifically, to a heat dissipation method and a laser projection device. Background Art

[0002] Laser projection equipment is a device that can generate images with lasers and project them onto a screen. Laser projection equipment includes a laser, which generates heat while emitting laser light, causing the laser temperature to rise. When the temperature of the laser is too high, it will affect the laser's luminous efficiency and shorten the laser's service life.

[0003] At present, a heat sink can be set in the laser projection device. The heat sink includes a heat sink, a heat pipe and a heat conductive plate. The heat conductive plate can contact the laser and transfer the heat of the laser to the heat sink through the heat pipe to reduce the temperature of the laser.

[0004] However, when the laser projection device is in an outdoor environment with low temperature, the working medium in the heat pipe is prone to ice, which affects the heat dissipation effect of the heat pipe and causes the laser projection device to trigger thermal protection and fail to work normally. Summary of the invention

[0005] The embodiments of the present application provide a heat dissipation method and a laser projection device, which can defrost the working medium in the heat pipe in time to ensure the normal operation of the laser.

[0006] In a first aspect, an embodiment of the present application provides a heat dissipation method, the method being used for a laser projection device, the laser projection device comprising a housing, a laser component located in the housing, and a heat dissipation component located on one side of the laser component, the heat dissipation component being configured to dissipate heat for the laser component, the laser projection device further comprising a heating component, the heating component being configured to heat air in the housing, the method comprising:

[0007] When the ambient temperature is within a first preset temperature range, controlling the heating component to heat the air entering the shell to increase the temperature of the air in the shell;

[0008] After a preset time, it is detected whether the medium in the heat pipe in the heat dissipation component is frozen. If so, the heating component is controlled to increase the heating temperature of the air entering the shell. If not, the heating component is controlled to maintain the heating temperature of the air entering the shell.

[0009] The heat dissipation method provided in the embodiment of the present application controls the heating component to heat the air entering the shell when the ambient temperature is within the first preset temperature range, thereby raising the air temperature in the shell, so that the medium in the heat pipe can be thawed when the medium in the heat pipe is frozen. After a preset time, it is detected whether the medium in the heat pipe is frozen. If so, the heating component is controlled to increase the heating temperature of the air entering the shell to continue to thaw the medium in the heat pipe. If not, the heating component is controlled to maintain the heating temperature of the air in the shell to prevent the medium in the heat pipe from freezing again, thereby ensuring normal heat dissipation of the heat pipe and ensuring the normal operation of the laser projection device.

[0010] In some embodiments of the present application, the heat dissipation assembly includes an air inlet fan and an air outlet fan;

[0011] The detecting whether the medium in the heat pipe in the heat dissipation component is frozen specifically includes:

[0012] Detect whether the current gear position of the air inlet fan and / or the air outlet fan reaches the preset gear position, or detect whether the difference between the thermal protection temperature of the laser component and the current temperature is within a second preset temperature range, or detect whether the outlet temperature of the air outlet fan is less than the preset temperature.

[0013] The heat dissipation method provided in this embodiment determines that the performance has deteriorated due to freezing of the medium in the heat pipe when the current gear position of the air inlet fan and / or the air outlet fan reaches a preset gear position, or when the difference between the thermal protection temperature of the laser component and the current temperature is within a second preset range, or when the air outlet temperature of the air outlet fan is lower than a preset temperature, so as to defrost the red medium in the heat pipe in time.

[0014] In some embodiments of the present application, the laser projection device includes a first temperature sensor;

[0015] When the ambient temperature is within a first preset temperature range, controlling the heating component to heat the air entering the housing specifically includes:

[0016] Controlling the first temperature sensor to detect the ambient temperature, and when the ambient temperature is within a first preset temperature range, controlling the heating component to heat the air entering the housing;

[0017] After a first preset time has passed, the laser assembly is controlled to be powered on.

[0018] The heat dissipation method provided in this embodiment detects the ambient temperature before the laser component is powered on. When the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air in the shell to increase the air temperature in the shell, so as to preheat the air in the shell before the laser is powered on, so that when the medium in the heat pipe in the heat dissipation component is frozen, the frozen medium can be thawed. After the first preset time, the laser component is controlled to be powered on, which can ensure the normal operation of the heat pipe, thereby ensuring that the heat-conducting component can effectively dissipate heat.

[0019] In some embodiments of the present application, the laser projection device includes a first temperature sensor;

[0020] When the ambient temperature is within a first preset temperature range, controlling the heating component to heat the air entering the housing specifically includes:

[0021] After the laser assembly is powered on, the first temperature sensor is controlled to detect the ambient temperature;

[0022] When the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air entering the housing, and the air inlet fan and the air outlet fan are controlled to work in an initial gear position in advance;

[0023] After the preset time has passed, detecting whether the medium in the heat pipe in the heat dissipation component is frozen specifically includes:

[0024] After a first preset time has passed, it is detected whether the current gear position of the air inlet fan and / or the air outlet fan reaches the preset gear position.

[0025] The heat dissipation method provided in this embodiment detects the ambient temperature after the laser component is powered on. When the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air entering the shell and the air inlet fan and the air outlet fan are controlled to operate at an initial gear position. Then, it is detected whether the current gear positions of the air inlet fan and the air outlet fan reach the preset gear position. If so, it is determined that the medium in the heat pipe is frozen, and the heating component is controlled to increase the heating temperature of the air entering the shell to continue to thaw the medium in the heat pipe. If not, the heating component is controlled to maintain the heating temperature of the air in the shell, thereby ensuring normal heat dissipation of the heat pipe and ensuring the normal operation of the laser projection equipment.

[0026] In some embodiments of the present application, the laser projection device includes a first temperature sensor and a second temperature sensor;

[0027] When the ambient temperature is within a first preset temperature range, controlling the heating component to heat the air entering the housing specifically includes:

[0028] After the laser assembly is powered on, the first temperature sensor is controlled to detect the ambient temperature;

[0029] When the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air entering the housing, and the air inlet fan and the air outlet fan are controlled to work fixedly at an initial gear position;

[0030] After the preset time has passed, detecting whether the medium in the heat pipe in the heat dissipation component is frozen specifically includes:

[0031] After a first preset time has passed, the second temperature sensor is controlled to detect the current temperature of the laser assembly, and a difference between the thermal protection temperature and the current temperature is compared to determine whether it is within a second preset temperature range.

[0032] The heat dissipation method provided in this embodiment detects the ambient temperature after the laser component is powered on. When the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air entering the shell and the air inlet fan and the air outlet fan are controlled to work fixedly at the initial gear position. Then the second temperature sensor is controlled to detect the current temperature of the laser component, and the difference between the thermal protection temperature of the laser component and the current temperature is compared to see whether it is within a second preset range. If so, it is determined that the medium in the heat pipe is frozen, and the heating component is controlled to increase the heating temperature of the air entering the shell to continue to thaw the medium in the heat pipe. If not, the heating component is controlled to maintain the heating temperature of the air in the shell, thereby ensuring normal heat dissipation of the heat pipe and ensuring the normal operation of the laser projection equipment.

[0033] In some embodiments of the present application, the laser projection device includes a first temperature sensor and a third temperature sensor;

[0034] When the ambient temperature is within a first preset temperature range, controlling the heating component to heat the air entering the housing specifically includes:

[0035] After the laser assembly is powered on, the first temperature sensor is controlled to detect the ambient temperature;

[0036] When the ambient temperature is within a first preset temperature range, controlling the heating component to heat the air entering the housing;

[0037] After the preset time has passed, detecting whether the medium in the heat pipe in the heat dissipation component is frozen specifically includes:

[0038] After a second preset time has passed, the third temperature sensor is controlled to detect the outlet air temperature of the outlet fan, and a comparison is made to see whether the outlet air temperature is less than a preset temperature.

[0039] The heat dissipation method provided in this embodiment detects the ambient temperature after the laser component is powered on. When the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air entering the shell, and then the third temperature sensor is controlled to detect the outlet temperature of the air outlet fan, and the outlet temperature is compared to see whether it is less than the preset temperature. If so, it is determined that the medium in the heat pipe is frozen, and the heating component is controlled to increase the heating temperature of the air entering the shell to continue to thaw the medium in the heat pipe. If not, the heating component is controlled to maintain the heating temperature of the air in the shell, thereby ensuring normal heat dissipation of the heat pipe and the normal operation of the laser projection equipment.

[0040] In some embodiments of the present application, the method further includes:

[0041] When the ambient temperature is greater than a third preset temperature threshold, the heating component is controlled to stop heating the air entering the shell.

[0042] In the heat dissipation method provided in this embodiment, when the ambient temperature is greater than the third preset temperature threshold, the heating component is turned off to avoid increasing the temperature of the laser component and affecting the light emission of the laser component.

[0043] In a second aspect, an embodiment of the present application provides a laser projection device, the device comprising:

[0044] A housing, a laser assembly, a heat dissipation assembly, a heating assembly and a processing assembly located in the housing;

[0045] The heat dissipation component is configured to dissipate heat for the laser component;

[0046] The processing component is configured to control the heating component to heat the air entering the housing to increase the temperature of the air in the housing when the ambient temperature is within a first preset temperature range;

[0047] After a preset time, it is detected whether the medium in the heat pipe in the heat dissipation component is frozen. If so, the heating component is controlled to increase the heating temperature of the air entering the shell. If not, the heating component is controlled to maintain the heating temperature of the air entering the shell.

[0048] The laser projection device provided in the embodiment of the present application includes a heating component. When the ambient temperature is at a first preset temperature, the heating component is controlled to heat the air entering the housing to increase the air temperature in the housing, so that the medium in the heat pipe can be thawed when the medium in the heat pipe is frozen. After a preset time, it is detected whether the medium in the heat pipe is frozen. If so, the heating component is controlled to increase the heating temperature of the air entering the housing to continue to thaw the medium in the heat pipe. If not, the heating component is controlled to maintain the heating temperature of the air in the housing, so as to ensure the normal heat dissipation of the heat pipe and the normal operation of the laser projection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0050] Figure 1 This is an application scenario diagram of a laser projection device provided by the present application according to an exemplary embodiment;

[0051] Figure 2 A schematic diagram of the structure of a laser projection device provided by the present application according to an exemplary embodiment;

[0052] Figure 3 This is a schematic structural diagram of a heat dissipation assembly provided by the present application according to an exemplary embodiment;

[0053] Figure 4 This is a schematic structural diagram of a heat dissipation assembly provided by the present application according to an exemplary embodiment;

[0054] Figure 5 A schematic diagram of a heat dissipation method according to an exemplary embodiment of the present application;

[0055] Figure 6 A schematic diagram of the structure of a laser projection device provided by the present application according to an exemplary embodiment;

[0056] Figure 7 A schematic diagram of a heat dissipation method according to an exemplary embodiment of the present application;

[0057] Figure 8 A schematic flow chart of a heat dissipation method provided by the present application according to another exemplary embodiment;

[0058] Fig. 9 A schematic flow chart of a heat dissipation method provided by the present application according to another exemplary embodiment;

[0059] Fig.10 The figure is a flow chart of a heat dissipation method provided by the present application according to yet another exemplary embodiment. DETAILED DESCRIPTION

[0060] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0061] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0062] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0063] Figure 1 Schematic diagram of the operation scene between the laser projection device and the control device in the embodiment of the present application. Figure 1 As shown, the user can operate the laser projection device 10 via the smart device 30 or the control device 20 .

[0064] In some embodiments, the control device 20 may be a remote controller, and the communication between the remote controller and the laser projection device includes infrared protocol communication or Bluetooth protocol communication, and other short-distance communication methods, and the laser projection device 10 is controlled wirelessly or wired. The user can input user commands through buttons on the remote controller, voice input, control panel input, etc. to control the laser projection device 10.

[0065] In some embodiments, a smart device 30 (such as a mobile terminal, a tablet computer, a computer, a laptop computer, etc.) may also be used to control the laser projection device 10. For example, the laser projection device 10 is controlled using an application running on the smart device.

[0066] In some embodiments, the laser projection device 10 may not use the above-mentioned smart device or control device to receive instructions, but may receive user control through touch or gestures.

[0067] In some embodiments, the laser device 10 can also be controlled in a manner other than the control device 20 and the smart device 30. For example, the user's voice command control can be directly received through a module for obtaining voice commands configured inside the laser projection device 10, or the user's voice command control can be received through a voice control device set outside the laser projection device 10.

[0068] In some embodiments, the laser projection device 10 also communicates data with the server 40. The laser projection device 10 may be allowed to communicate via a local area network (LAN), a wireless local area network (WLAN), and other networks. The server 40 may provide various content and interactions to the laser projection device 10. The server 10 may be a cluster or multiple clusters, and may include one or more types of servers.

[0069] Figure 2 The schematic diagram of the structure of a laser projection device is shown. The laser projection device 10 includes a housing (not shown in the figure), a light source 100 arranged in the housing, an optical engine 200 and a lens 300. The laser beam emitted by the light source 100 enters the optical engine 200, and the optical engine 200 modulates the laser beam so that the laser beam carries image information. The light beam output by the optical engine 200 is magnified by the lens 300 to form a projection image.

[0070] The light source 100 includes a laser assembly, which includes three-color lasers, namely a red laser, a blue laser and a green laser. The red laser emits a red laser beam, the blue laser emits a blue laser beam, and the green laser emits a green laser beam.

[0071] like Figure 2 As shown, the laser projection device 10 further includes a PCB board 500 disposed in the housing, and the PCB board 500 includes a power board, a TV board, a control board, a display board, etc. The PCB board 500 can provide driving force for other components in the laser projection device 10 and control the input and output of signals of the laser projection device 10, such as providing a driving signal for the laser, and the driving signal drives the laser to operate.

[0072] The laser can emit laser after being powered on. However, the photoelectric conversion efficiency of the laser is usually around 40%, and the remaining electrical energy is converted into heat energy, that is, the laser will generate heat during operation. When the heat causes the laser temperature to be too high, the laser will not be able to maintain a specific luminous rate, thereby causing imaging display problems, such as color cast problems.

[0073] like Figure 2-Figure 4As shown, the laser projection device 10 includes a heat dissipation component 400, and the heat dissipation component 400 includes a heat sink 401 and an air outlet fan 402 located on one side or both sides of the heat sink 401. The heat dissipation component 400 may also include a heat pipe 403 and a heat conducting plate 404, and the heat pipe 403 and the heat conducting plate 404 are used to transfer heat. The heat conducting plate 404 can be in contact with the laser, and transfer the heat of the laser to the heat sink 401 through the heat pipe 403, and the heat on the heat sink 401 can be sent out of the housing through the air outlet fan 402. The laser projection device 10 may also include an air inlet fan 405, and the air inlet fan 405 is used to draw air into the housing to ensure air circulation in the housing, and can also cool the PCB board 500. The air outlet fan 402 and the air inlet fan 405 are arranged relative to each other, and the whole machine can be cooled by convection wind.

[0074] It should be noted that when the laser projection device 10 is not in operation in an outdoor environment with a relatively low temperature, the working medium in the heat pipe 403 is prone to ice. Alternatively, when the laser projection device 10 is in operation in an outdoor environment with a relatively low temperature, forced convection heat is dissipated through the air inlet fan 403 and the air outlet fan 405, causing the temperature of the heat pipe 403 to drop sharply, thereby causing the working medium in the heat pipe 403 to freeze. When the working medium in the heat pipe 403 freezes, the heat dissipation effect of the heat pipe 403 deteriorates, causing the laser projection device 10 to trigger thermal protection and fail to work normally.

[0075] Generally, the ambient temperature for normal operation of laser projection equipment is between 5℃ and 35℃. However, some commercial laser projection equipment may be used outdoors. When the outdoor environment is below 0℃, the working medium in the heat pipe of the laser projection equipment is easy to freeze, causing the heat pipe to fail, thus causing the laser projection equipment to trigger thermal protection and fail to work properly. Among them, commercial laser projection equipment has the same working principle as ordinary laser projection equipment. Commercial laser projection equipment may require higher display brightness, which makes the heat generated by the laser higher.

[0076] In some embodiments, the brightness of the laser can be reduced. Reducing the brightness of the laser can prevent the laser projection device from triggering thermal protection when the working medium in the heat pipe of the laser projection device freezes, so that the laser projection device can operate normally. However, reducing the brightness of the laser will cause the display brightness of the laser projection device to decrease, affecting the user experience.

[0077] The present application provides a heat dissipation method, which controls a heating component in a laser projection device to heat the air in a shell to increase the air temperature in the shell, so that the medium in the heat pipe can be thawed when the medium in the heat pipe is frozen. After a period of time, it is detected whether the medium in the heat pipe is thawed. If not, the heating temperature of the air in the shell is increased to continue to thaw the medium in the heat pipe, so as to ensure that the heat pipe effectively dissipates heat and ensure the normal operation of the laser projection device.

[0078] The technical solution of the present application is described in detail below in conjunction with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0079] Figure 5 A schematic diagram of a heat dissipation method provided in this application. Figure 5 As shown, the method comprises the following steps:

[0080] S101. When the ambient temperature is within a first preset temperature range, control the heating component to heat the air entering the shell to increase the temperature of the air in the shell.

[0081] Optional, such as Figure 2-Figure 4 As shown, the laser projection device includes a laser assembly 100. The laser assembly includes a laser to generate a light beam, wherein the laser may include a red laser, a green laser and a blue laser, the red laser generates a red light beam, the green laser generates a green light beam, and the blue laser generates a blue light beam.

[0082] The laser assembly generates heat during operation, so the laser projection device further includes a heat dissipation assembly 400, such as Figure 3 and Figure 4 As shown, the heat dissipation assembly 400 includes a heat sink 401, a heat pipe 403 and a heat conducting plate 404. The heat conducting plate 404 contacts the laser assembly and is connected to the heat pipe 403. The heat conducting plate 404 transfers the heat of the laser assembly to the heat conducting pipe 403. The heat conducting pipe 403 extends into the heat sink 401 to transfer the heat of the laser assembly to the heat sink 401. The heat sink 401 dissipates the heat outside the housing.

[0083] When the ambient temperature of the laser projection device is within the first preset temperature range, the heat pipe 403 in the laser projection device is prone to freezing. Figure 6 As shown, the laser projection device also includes a heating component 600. When the ambient temperature of the laser projection device is within a first preset temperature range, the heating component is controlled to heat the air entering the shell, thereby increasing the temperature of the air in the shell, so as to thaw the medium in the heat pipe when the medium in the heat pipe is frozen.

[0084] For example, when the ambient temperature of the laser projection device is less than or equal to a first preset temperature threshold, the heating component is controlled to heat the air entering the housing to increase the temperature of the air in the housing. The first preset temperature threshold may be an upper limit of a first preset temperature range. Optionally, the first preset temperature range may be below 0°C, and the first preset temperature threshold may be 0°C.

[0085] In some embodiments, before the laser is powered on, the ambient temperature is detected. When the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air in the housing to increase the air temperature in the housing, so as to preheat the air in the housing before the laser component is powered on, so that when the medium in the heat pipe in the heat dissipation component is frozen, the frozen medium can be thawed. After the first preset time, the laser component is controlled to be powered on, so that the heat pipe can work normally, thereby ensuring that the heat conduction component can effectively dissipate heat. The first preset time can be determined according to actual conditions, for example, it can be 2 minutes.

[0086] In this embodiment, before the laser component is powered on, the ambient temperature is detected. When the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air in the shell. At the same time, the air inlet fan and the air outlet fan in the heat dissipation component can be controlled to be in a working state. The heating component heats the air to increase the air temperature so as to defrost the frozen medium in the heat pipe. The air inlet fan and the air outlet fan can promote the circulation of the heated air so that the heated air can quickly circulate to the heat pipe, thereby increasing the thawing rate of the heat pipe.

[0087] For example, the laser projection device further includes a first temperature sensor, which is controlled to detect the ambient temperature before the laser component is powered on, and when the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air entering the housing. After a first preset time, the laser component is controlled to be powered on, so that the frozen medium in the heat pipe is thawed before the laser component is powered on, thereby ensuring the normal operation of the heat pipe.

[0088] In other embodiments, after the laser assembly is powered on, the ambient temperature may be detected. When the ambient temperature is within a first preset temperature threshold, the heating assembly may be controlled to heat the air entering the housing to increase the air temperature in the housing.

[0089] S102: After a preset time has passed, detect whether the medium in the heat pipe in the heat dissipation component is frozen.

[0090] Optionally, after the heating component is controlled to heat the air entering the housing for a preset time, the medium in the heat pipe is detected to be frozen, that is, the medium in the heat pipe is detected to be thawed. For example, the medium in the heat pipe may be detected to be frozen at every preset time.

[0091] In some embodiments, whether the medium in the heat pipe is frozen can be detected by detecting whether the current gear of the air inlet fan and the air outlet fan reaches the preset gear, wherein the gears of the air inlet fan and the air outlet fan are consistent. Usually, when the heat pipe is in a normal state, for example, when it is not frozen, the air inlet fan and the air outlet fan work at the initial gear, which is sufficient to control the temperature of the laser assembly at a very low level to ensure that the laser assembly maintains a specific luminous efficiency. At this time, there is no need to increase the gear of the air inlet fan and the air outlet fan; if the air inlet fan and the air outlet fan are upgraded, for example, the current gear of the air inlet fan and the air outlet fan reaches the preset gear, it can be determined that the medium in the heat pipe is frozen, resulting in performance deterioration. Among them, the preset gear is greater than the initial gear.

[0092] In other embodiments, whether the medium in the heat pipe is frozen can be detected by detecting whether the difference between the thermal protection temperature of the laser assembly and the current temperature is within the second preset temperature range. Usually, when the heat pipe is in a normal state, if the ambient temperature is within the first preset temperature range, the heating assembly is controlled to heat the air entering the shell, causing the air temperature in the shell to rise. If the heating assembly is controlled to heat the air entering the shell while the air inlet fan and the outlet fan are controlled to be in working state, the rising speed of the air in the shell will be accelerated. When the air temperature in the shell rises, the temperature of the laser assembly will rise but not much. At this time, if it is detected that the difference between the thermal protection temperature of the laser assembly and the current temperature is small to a certain extent, for example, within the second preset temperature range, it can be determined that the medium in the heat pipe is frozen.

[0093] For example, it can be detected whether the difference between the thermal protection temperature of the laser component and the current temperature is less than or equal to the second preset temperature threshold, and the second preset temperature threshold can be the upper limit of the second preset temperature range. For example, the second preset temperature range is within 20°C, and the second preset temperature threshold is 20°C.

[0094] In some other embodiments, whether the medium in the heat pipe is frozen can be detected by detecting whether the air outlet temperature of the air outlet fan is less than a preset temperature. Usually, when the external ambient temperature is very low, the temperature of the air entering the housing is very low, and the temperature of the air flowing through the heat sink is also very low. The more heat the air flowing through the heat sink takes away, the faster the temperature of the heat pipe decreases, and the more freezing of the medium in the heat pipe is aggravated. When the air outlet temperature of the air outlet fan is very low, for example, when the air outlet temperature of the air outlet fan is less than a preset temperature, it can be determined that the medium in the heat pipe is frozen. The preset temperature can be determined according to actual conditions.

[0095] When the medium in the heat pipe is frozen, step S103 may be executed, and when the medium in the heat pipe is not frozen, step S104 may be executed.

[0096] In some embodiments, before detecting whether the medium in the heat pipe is frozen, when the ambient temperature is outside the first preset temperature range, after the first preset time, the ambient temperature, the current temperature of the laser assembly, and the current gear of the air inlet fan and / or the air outlet fan are detected, wherein the current gear of the air inlet fan is the same as the current gear of the air outlet fan, and only the current gear of the air inlet fan or the air outlet fan can be detected, or the current gear of the air inlet fan and the air outlet fan can be detected. When the ambient temperature is within the first preset temperature range, or when the ambient temperature is greater than the first preset temperature threshold and less than or equal to the third preset temperature threshold and the current gear of the air inlet fan reaches the preset gear, or when the difference between the thermal protection temperature of the laser assembly and the current temperature is within the second preset temperature range, it is determined that the medium in the heat pipe is frozen, and therefore, the heating assembly can be controlled to heat the air in the housing. Then, after the preset time, it is detected whether the medium in the heat pipe is frozen, that is, whether the medium in the heat pipe is thawed. The first preset temperature threshold is, for example, 0°C, and the third preset temperature threshold can be, for example, 5°C.

[0097] S103, controlling the heating component to increase the heating temperature of the air entering the shell.

[0098] When the medium in the heat pipe is still frozen, it can be determined that the heating component is controlled to heat the air entering the shell, and the medium in the heat pipe is still not thawed. At this time, the heating component can be controlled to increase the heating temperature of the air entering the shell so that the medium in the heat pipe can be thawed.

[0099] In practical applications, the heating component may include multiple gears. When the ambient temperature is within a first preset temperature range, the heating component may be controlled to operate at an initial gear to heat the air entering the housing. After a preset time, if the medium in the heat pipe is still frozen, the heating component may be controlled to increase the gear to increase the heating temperature of the air entering the housing, thereby further increasing the air temperature in the housing. The higher the gear, the higher the heating temperature.

[0100] For example, when the ambient temperature is within a first preset temperature range, the heating component can be controlled to operate at an initial gear. After a preset time, if the medium in the heat pipe is still frozen, the heating component is controlled to operate at a preset gear, wherein the preset gear is greater than the initial gear.

[0101] S104, controlling the heating component to maintain the heating temperature of the air entering the shell.

[0102] When the medium in the heat pipe is not frozen, it can be determined that the heating component is controlled to heat the air entering the shell so that the medium in the heat pipe is thawed. In order to prevent the medium in the heat pipe from freezing again, the heating component can be controlled to continue heating the air in the shell and keep the heating temperature unchanged.

[0103] For example, when the ambient temperature is within a first preset temperature range, the heating component can be controlled to operate at an initial gear. After a preset time, if the medium in the heat pipe is not frozen, the heating component is controlled to continue operating at the preset gear.

[0104] In some embodiments, when the ambient temperature is greater than a third preset temperature threshold, the heating component is controlled to stop heating the air entering the housing. When the ambient temperature is high, the medium in the heat pipe will not freeze. If the air in the housing is continued to be heated, the temperature of the laser component will increase, affecting the light emission of the laser component. Therefore, when the ambient temperature is greater than the third preset temperature threshold, the heating component is turned off. The third preset temperature threshold is, for example, 5°C.

[0105] It should be noted that the heat dissipation method provided in this embodiment can be implemented by a processing component on a PCB board.

[0106] The heat dissipation method provided by the present application controls the heating component to heat the air entering the shell when the ambient temperature is within the first preset temperature range, thereby raising the air temperature in the shell, so that the medium in the heat pipe can be thawed when the medium in the heat pipe is frozen. After a preset time, it is detected whether the medium in the heat pipe is frozen. If so, the heating component is controlled to increase the heating temperature of the air entering the shell to continue to thaw the medium in the heat pipe. If not, the heating component is controlled to maintain the heating temperature of the air in the shell, so as to ensure normal heat dissipation of the heat pipe and ensure the normal operation of the laser projection device.

[0107] Figure 7 A schematic diagram of a heat dissipation method provided in this application. Figure 7 As shown, the method comprises the following steps:

[0108] S201, controlling a first temperature sensor to detect ambient temperature.

[0109] Before the laser is powered on, the first temperature sensor is controlled to detect the ambient temperature Ta. Optionally, the first temperature sensor may be a NTC (Negative Temperature Coefficient thermistor).

[0110] S202: Determine whether the ambient temperature is within a first preset temperature range.

[0111] Optionally, it is determined whether the ambient temperature Ta is less than or equal to a first preset temperature threshold, where the first preset temperature threshold is an upper limit of a first preset temperature range. For example, it is determined whether Ta is ≤ 0°C.

[0112] If not, execute step S203; if so, execute step S206.

[0113] S203, control the laser assembly to power on, and after a first preset time, detect the ambient temperature, the current temperature of the laser assembly, and the current gear position of the air inlet fan and / or the air outlet fan, and calculate the difference between the thermal protection temperature of the laser assembly and the current temperature.

[0114] Optionally, when the ambient temperature Ta is greater than a first preset temperature threshold, the electric heating component on the laser assembly is controlled not to turn on, and the ambient temperature Ta, the current gear position of the air inlet fan and / or the air outlet fan, and the current temperature Tm of the laser assembly are detected once every first preset time, and the difference between the thermal protection temperature Tmax and the current temperature Tm is calculated.

[0115] Then, execute step S204.

[0116] S204, determine whether the ambient temperature is within a first preset temperature range, or determine whether the ambient temperature is greater than a first preset temperature threshold and less than or equal to a third preset temperature threshold, and whether the current temperature level of the air inlet fan and / or the air outlet fan reaches a preset level, or determine whether the difference between the thermal protection temperature of the laser assembly and the current temperature is within a second preset temperature range.

[0117] Optionally, when the ambient temperature Ta is within a first preset temperature range, or when the ambient temperature Ta is greater than a first preset temperature threshold and less than or equal to a third preset temperature threshold and the current gear of the air inlet fan and / or the air outlet fan reaches a preset gear, or when the difference between the thermal protection temperature Tmax of the laser component and the current temperature Tm is within a second preset temperature range, execute step S205.

[0118] When the ambient temperature Ta is not within the first preset temperature range, or the ambient temperature Ta is less than or equal to the first preset temperature threshold, or the current gear of the air inlet fan and / or the air outlet fan does not reach the preset gear, or the difference between the thermal protection temperature Tmax of the laser component and the current temperature Tm is outside the second preset temperature range, execute step S203.

[0119] For example, when Ta≤0°C, or 0<Ta≤5°C and the current gear of the air inlet fan and / or the air outlet fan is ≥2, or Tmax-Tm≤20°C, step S206 is performed. In this example, the initial gear is 1 and the preset gear is 2.

[0120] S205, controlling the heating component to heat the air in the shell to increase the temperature of the air in the shell.

[0121] Optionally, when the ambient temperature Ta is within a first preset temperature range, or when the ambient temperature Ta is greater than the first preset temperature threshold and less than or equal to the third preset temperature threshold and the current gear of the air inlet fan and / or the air outlet fan reaches the preset gear, or when the difference between the thermal protection temperature Tmax of the laser component and the current temperature Tm is within a second preset temperature range, the heating component is controlled to heat the air in the shell to increase the air temperature in the shell to defrost the medium in the heat pipe.

[0122] Then, execute step S207.

[0123] S206, controlling the air inlet fan and the air outlet fan to work at the initial gear position in advance, and controlling the heating component to heat the air in the shell to increase the air temperature in the shell, and controlling the laser component to power on after a first preset time.

[0124] Optionally, before the laser assembly is powered on, the air inlet fan and the air outlet fan are controlled to work, and the heating assembly is controlled to heat the air in the housing, thereby thawing the medium in the heat pipe in the heat dissipation assembly so that the heat pipe can circulate normally.

[0125] In some embodiments, after the air inlet fan and the air outlet fan are controlled to work at the initial gear position in advance, the air inlet fan and the air outlet fan can be controlled to maintain the initial gear position, that is, the gear position of the air inlet fan and the air outlet fan is fixed; the air inlet fan and the air outlet fan can also be controlled to work according to the preset working logic, at which time the gear position of the air inlet fan and the air outlet fan is variable, for example, it can be continuously increased. For example, the air inlet fan and the air outlet fan are pre-operated at the initial gear position for a first preset time, and the first preset time is, for example, 2 minutes.

[0126] Then, execute step S207.

[0127] S207. After a first preset time, detect whether the current gear position of the air inlet fan and / or the air outlet fan reaches the preset gear position, or detect whether the difference between the thermal protection temperature of the laser component and the current temperature is within a second preset temperature range, or detect whether the air outlet temperature of the air outlet fan is lower than the preset temperature.

[0128] Optionally, when the air inlet fan and the air outlet fan are working according to the preset working logic, it can be detected whether the gear position of the air inlet fan and / or the air outlet fan is increased, that is, whether the preset gear position is reached, or it can be detected whether the air outlet temperature of the air outlet fan is less than the preset temperature. When the air inlet fan and the air outlet fan are fixedly working at the initial gear position, it can be detected whether the difference between the thermal protection temperature of the laser component and the current temperature is within the second preset temperature range.

[0129] When the current gear position of the air inlet fan and / or the air outlet fan reaches the preset gear position, or the difference between the thermal protection temperature of the laser component and the current temperature is within the second preset temperature range, or the outlet temperature of the air outlet fan is lower than the preset temperature, execute step S208; if the current gear position of the air outlet fan and / or the air inlet fan does not reach the preset gear position, and the difference between the thermal protection temperature of the laser component and the current temperature is outside the second preset temperature range, and the outlet temperature of the air outlet fan is greater than or equal to the preset temperature, execute step S209.

[0130] S208, controlling the heating component to increase the heating temperature of the air entering the shell.

[0131] Optionally, the heating component is controlled to increase a gear, such as operating at a preset gear, to increase the heating temperature of the air entering the shell.

[0132] Then, execute step S207.

[0133] S209, controlling the heating component to maintain the heating temperature of the air entering the shell.

[0134] Optionally, the heating component is controlled to maintain an initial gear position to maintain the heating temperature of the air entering the shell.

[0135] Then, execute step S210.

[0136] S210: Detect whether the ambient temperature is greater than a third preset temperature threshold.

[0137] Optionally, the first temperature sensor is controlled to detect whether the ambient temperature is greater than a third preset temperature threshold.

[0138] If yes, execute step S211, if no, execute step S207.

[0139] S211. When the ambient temperature is greater than a third preset temperature threshold, the heating component is controlled to stop heating the air entering the shell.

[0140] Optionally, when the ambient temperature is greater than a third preset temperature threshold, the heating component is turned off.

[0141] Then, after a first preset time has passed, step S201 may be executed.

[0142] The heat dissipation method provided in this embodiment detects the ambient temperature before the laser component is powered on. When the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air in the shell to increase the air temperature in the shell, so as to preheat the air in the shell before the laser is powered on, so that when the medium in the heat pipe in the heat dissipation component is frozen, the frozen medium can be thawed. After the first preset time, the laser component is controlled to be powered on, which can ensure the normal operation of the heat pipe, thereby ensuring that the heat-conducting component can effectively dissipate heat.

[0143] Figure 8 A schematic diagram of a heat dissipation method provided in this application. Figure 8 As shown, the method comprises the following steps:

[0144] S301 , after the laser assembly is powered on, the first temperature sensor is controlled to detect the ambient temperature.

[0145] S302: Determine whether the ambient temperature is within a first preset temperature range.

[0146] If yes, execute step S305; if no, execute step S303.

[0147] S303: After a first preset time, detect the ambient temperature, the current temperature of the laser assembly, and the current gear position of the air inlet fan and / or the air outlet fan, and calculate the difference between the thermal protection temperature of the laser assembly and the current temperature.

[0148] Optionally, when the ambient temperature is outside the first preset temperature range, the heating component is not turned on, and the ambient temperature Ta, the current gear position of the air inlet fan and / or the air outlet fan, and the current temperature Tm of the laser component are detected once every first preset time, and the difference between the thermal protection temperature Tmax and the current temperature Tm is calculated.

[0149] Then, execute step S304.

[0150] S304, determine whether the ambient temperature is within a first preset temperature range, or determine whether the ambient temperature is greater than a first preset temperature threshold and less than or equal to a third preset temperature threshold, and whether the current temperature level of the air inlet fan and / or the air outlet fan reaches a preset level, or determine whether the difference between the thermal protection temperature of the laser assembly and the current temperature is within a second preset temperature range.

[0151] When the ambient temperature Ta is within the first preset temperature range, or when the ambient temperature Ta is greater than the first preset temperature threshold and less than or equal to the third preset temperature threshold and the current gear of the air inlet fan and / or the air outlet fan reaches the preset gear, or when the difference between the thermal protection temperature Tmax of the laser component and the current temperature Tm is within the second preset temperature range, execute step S305.

[0152] When the ambient temperature Ta is not within the first preset temperature range, or the ambient temperature Ta is less than or equal to the first preset temperature threshold, or the current gear of the air inlet fan and / or the air outlet fan does not reach the preset gear, or the difference between the thermal protection temperature Tmax of the laser component and the current temperature Tm is outside the second preset temperature range, execute step S303.

[0153] S305, controlling the heating component to heat the air in the shell to increase the temperature of the air in the shell, and controlling the air inlet fan and the air outlet fan to work at the initial gear position in advance.

[0154] Then, execute step S306.

[0155] S306: After a first preset time has passed, detect whether the current gear position of the air inlet fan and / or the air outlet fan reaches a preset gear position.

[0156] If yes, execute step S307, if no, execute step S308.

[0157] S307, controlling the heating component to increase the heating temperature of the air entering the shell.

[0158] Then, execute step S306.

[0159] S308, controlling the heating component to maintain the heating temperature of the air entering the shell.

[0160] Then, execute step S309.

[0161] S309: Detect whether the ambient temperature is greater than a third preset temperature threshold.

[0162] If yes, execute step S310, if no, execute step S306.

[0163] S310: When the ambient temperature is greater than a third preset temperature threshold, the heating component is controlled to stop heating the air entering the housing.

[0164] Then, step S301 may be executed.

[0165] The heat dissipation method provided in this embodiment detects the ambient temperature after the laser component is powered on. When the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air entering the shell and the air inlet fan and the air outlet fan are controlled to operate at an initial gear position. Then, it is detected whether the current gear positions of the air inlet fan and the air outlet fan reach the preset gear position. If so, it is determined that the medium in the heat pipe is frozen, and the heating component is controlled to increase the heating temperature of the air entering the shell to continue to thaw the medium in the heat pipe. If not, the heating component is controlled to maintain the heating temperature of the air in the shell, thereby ensuring normal heat dissipation of the heat pipe and ensuring the normal operation of the laser projection equipment.

[0166] Fig. 9 A schematic diagram of a heat dissipation method provided in this application. Fig. 9 As shown, the method comprises the following steps:

[0167] S401, after the laser assembly is powered on, the first temperature sensor is controlled to detect the ambient temperature.

[0168] S402: Determine whether the ambient temperature is within a first preset temperature range.

[0169] If yes, execute step S405; if no, execute step S403.

[0170] S403: After a first preset time, detect the ambient temperature, the current temperature of the laser assembly, and the current gear position of the air inlet fan and / or the air outlet fan, and calculate the difference between the thermal protection temperature of the laser assembly and the current temperature.

[0171] Optionally, when the ambient temperature is outside the first preset temperature range, the heating component is not turned on, and the fan is controlled according to normal fan logic. The ambient temperature Ta, the current gear position of the air inlet fan and / or the air outlet fan, and the current temperature Tm of the laser component are detected once every first preset time, and the difference between the thermal protection temperature Tmax and the current temperature Tm is calculated.

[0172] Then, execute step S404.

[0173] S404, determine whether the ambient temperature is within a first preset temperature range, or determine whether the ambient temperature is greater than a first preset temperature threshold and less than or equal to a third preset temperature threshold, and whether the current temperature level of the air inlet fan and / or the air outlet fan reaches a preset level, or determine whether the difference between the thermal protection temperature of the laser assembly and the current temperature is within a second preset temperature range.

[0174] When the ambient temperature Ta is within the first preset temperature range, or when the ambient temperature Ta is greater than the first preset temperature threshold and less than or equal to the third preset temperature threshold and the current gear of the air inlet fan and / or the air outlet fan reaches the preset gear, or when the difference between the thermal protection temperature Tmax of the laser component and the current temperature Tm is within the second preset temperature range, execute step S405.

[0175] When the ambient temperature Ta is not within the first preset temperature range, or the ambient temperature Ta is less than or equal to the first preset temperature threshold, or the current gear of the air inlet fan and / or the air outlet fan does not reach the preset gear, or the difference between the thermal protection temperature Tmax of the laser component and the current temperature Tm is outside the second preset temperature range, execute step S403.

[0176] S405, controlling the heating component to heat the air in the shell to increase the air temperature in the shell, and controlling the air inlet fan and the air outlet fan to work at the initial gear position.

[0177] Then, execute step S406.

[0178] S406: After a first preset time has passed, control the second temperature sensor to detect the current temperature of the laser assembly.

[0179] Then, execute step S407.

[0180] S407: Compare whether the difference between the thermal protection temperature of the laser assembly and the current temperature is within a second preset range.

[0181] If yes, execute step S408, if no, execute step S409.

[0182] S408, controlling the heating component to increase the heating temperature of the air entering the shell.

[0183] Then, execute step S407.

[0184] S409, controlling the heating component to maintain the heating temperature of the air entering the shell.

[0185] Then, execute step S410.

[0186] S410: Detect whether the ambient temperature is greater than a third preset temperature threshold.

[0187] If yes, execute step S411, if no, execute step S406.

[0188] S411. When the ambient temperature is greater than a third preset temperature threshold, the heating component is controlled to stop heating the air entering the shell, and the air inlet fan and the air outlet fan are controlled to restore normal control logic.

[0189] Then, step S401 may be executed.

[0190] The heat dissipation method provided in this embodiment detects the ambient temperature after the laser component is powered on. When the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air entering the shell and the air inlet fan and the air outlet fan are controlled to work fixedly at the initial gear position. Then the second temperature sensor is controlled to detect the current temperature of the laser component, and the difference between the thermal protection temperature of the laser component and the current temperature is compared to see whether it is within a second preset range. If so, it is determined that the medium in the heat pipe is frozen, and the heating component is controlled to increase the heating temperature of the air entering the shell to continue to thaw the medium in the heat pipe. If not, the heating component is controlled to maintain the heating temperature of the air in the shell, thereby ensuring normal heat dissipation of the heat pipe and ensuring the normal operation of the laser projection equipment.

[0191] Fig.10 A schematic diagram of a heat dissipation method provided in this application. Fig.10 As shown, the method comprises the following steps:

[0192] S501 , after the laser assembly is powered on, the first temperature sensor is controlled to detect the ambient temperature.

[0193] S502: Determine whether the ambient temperature is within a first preset temperature range.

[0194] If yes, execute step S505; if no, execute step S503.

[0195] S503: After a first preset time, detect the ambient temperature, the current temperature of the laser assembly, and the current gear position of the air inlet fan and / or the air outlet fan, and calculate the difference between the thermal protection temperature of the laser assembly and the current temperature.

[0196] Optionally, when the ambient temperature is outside the first preset temperature range, the heating component is not turned on, and the fan is controlled according to normal fan logic. The ambient temperature Ta, the current gear position of the air inlet fan and / or the air outlet fan, and the current temperature Tm of the laser component are detected once every first preset time, and the difference between the thermal protection temperature Tmax and the current temperature Tm is calculated.

[0197] Then, execute step S504.

[0198] S504, determine whether the ambient temperature is within a first preset temperature range, or determine whether the ambient temperature is greater than a first preset temperature threshold and less than or equal to a third preset temperature threshold, and whether the current gear position of the air inlet fan and / or the air outlet fan reaches the preset gear position, or determine whether the difference between the thermal protection temperature of the laser component and the current temperature is within a second preset temperature range.

[0199] When the ambient temperature Ta is within the first preset temperature range, or when the ambient temperature Ta is greater than the first preset temperature threshold and less than or equal to the third preset temperature threshold and the current gear of the air inlet fan and / or the air outlet fan reaches the preset gear, or when the difference between the thermal protection temperature Tmax of the laser component and the current temperature Tm is within the second preset temperature range, execute step S505.

[0200] When the ambient temperature Ta is not within the first preset temperature range, or the ambient temperature Ta is less than or equal to the first preset temperature threshold, or the current gear of the air inlet fan and / or the air outlet fan does not reach the preset gear, or the difference between the thermal protection temperature Tmax of the laser component and the current temperature Tm is outside the second preset temperature range, execute step S503.

[0201] S505: Control the heating component to heat the air in the shell to increase the temperature of the air in the shell.

[0202] Then, execute step S506.

[0203] S506: After a second preset time has passed, control the third temperature sensor to detect the air outlet temperature of the air outlet fan.

[0204] Then, execute step S507.

[0205] S507: Compare whether the air outlet temperature is lower than a preset temperature.

[0206] If yes, go to step S508, if no, go to step S509.

[0207] S508: Control the heating component to increase the heating temperature of the air entering the shell.

[0208] Then, execute step S506.

[0209] S509: Control the heating component to maintain the heating temperature of the air entering the shell.

[0210] Then, execute step S510.

[0211] S510: Detect whether the ambient temperature is greater than a third preset temperature threshold.

[0212] If yes, execute step S511, if no, execute step S506.

[0213] S511. When the ambient temperature is greater than a third preset temperature threshold, the heating component is controlled to stop heating the air entering the shell.

[0214] Then, step S501 may be executed.

[0215] The heat dissipation method provided in this embodiment detects the ambient temperature after the laser component is powered on. When the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air entering the shell, and then the third temperature sensor is controlled to detect the outlet temperature of the air outlet fan, and the outlet temperature is compared to see whether it is less than the preset temperature. If so, it is determined that the medium in the heat pipe is frozen, and the heating component is controlled to increase the heating temperature of the air entering the shell to continue to thaw the medium in the heat pipe. If not, the heating component is controlled to maintain the heating temperature of the air in the shell, thereby ensuring normal heat dissipation of the heat pipe and the normal operation of the laser projection equipment.

[0216] Figure 6 This is a schematic diagram of the structure of a laser projection device provided in this application. Figure 6As shown, the device includes: a housing, a laser assembly 100 located in the housing, a heat dissipation assembly, a heating assembly 600 and a processing assembly;

[0217] The heat dissipation component is configured to dissipate heat for the laser component 100;

[0218] The processing component is configured to control the heating component 600 to heat the air entering the housing to increase the temperature of the air in the housing when the ambient temperature is within a first preset temperature range;

[0219] After a preset time, it is detected whether the medium in the heat pipe in the heat dissipation component is frozen. If so, the heating component 600 is controlled to increase the heating temperature of the air entering the shell. If not, the heating component 600 is controlled to maintain the heating temperature of the air entering the shell.

[0220] Optionally, the processing component may be located in the PCB board 500. For example, the PCB board 500 may include a power board of a laser projection device, and the heating component is controlled by the power board of the laser projection device.

[0221] Optional, such as Figure 6 As shown, the heat dissipation assembly includes a heat sink 401, an air inlet fan 405 and an air outlet fan 402. The air inlet fan 405 is used to draw air into the shell to ensure air circulation in the shell and to cool the PCB board 500. The air outlet fan 402 and the air inlet fan 405 are arranged relative to each other and can cool the entire machine by convection wind.

[0222] In some embodiments, the heating component 600 can be located on the side of the shell away from the air inlet fan 405, that is, at the air inlet of the shell, so as to heat the air drawn into the shell by the air inlet fan 405, increase the air temperature in the shell, reduce the convective heat transfer coefficient of the heat pipe, and avoid the heat pipe from freezing and failing due to excessive heat dissipation.

[0223] In other embodiments, the heating assembly 600 may also be located near the heat pipe to increase the temperature of the air at the heat pipe and accelerate the thawing of the heat pipe.

[0224] The laser projection device provided by the present application includes a heating component. When the ambient temperature is at a first preset temperature, the heating component is controlled to heat the air entering the housing to increase the air temperature in the housing, so that the medium in the heat pipe can be thawed when the medium in the heat pipe is frozen. After a preset time, it is detected whether the medium in the heat pipe is frozen. If so, the heating component is controlled to increase the heating temperature of the air entering the housing to continue to thaw the medium in the heat pipe. If not, the heating component is controlled to maintain the heating temperature of the air in the housing, so as to ensure the normal heat dissipation of the heat pipe and the normal operation of the laser projection device.

[0225] The present application also provides a computer-readable storage medium, which may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes. Specifically, the computer-readable storage medium stores program instructions, and the program instructions are used for the methods in the above embodiments.

[0226] The present application also provides a program product, which includes an execution instruction, which is stored in a readable storage medium. At least one control module of the display device can read the execution instruction from the readable storage medium, and at least one control module executes the execution instruction so that the display device implements the handwriting erasing method provided by the various embodiments described above.

[0227] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0228] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A heat dissipation method, characterized in that: The method is used for a laser projection device, the laser projection device comprises a housing, a laser component located in the housing, and a heat dissipation component located on one side of the laser component, the heat dissipation component being configured to dissipate heat from the laser component, the laser projection device further comprises a heating component located in the housing, the heating component being configured to heat air in the housing, the method comprising: When the ambient temperature is within a first preset temperature range, controlling the heating component to heat the air entering the shell to increase the temperature of the air in the shell; After a preset time, it is detected whether the medium in the heat pipe in the heat dissipation component is frozen. If so, the heating component is controlled to increase the heating temperature of the air entering the shell. If not, the heating component is controlled to maintain the heating temperature of the air entering the shell.

2. The method according to claim 1, characterized in that The heat dissipation component includes an air inlet fan and an air outlet fan; The detecting whether the medium in the heat pipe in the heat dissipation component is frozen specifically includes: Detect whether the current gear position of the air inlet fan and / or the air outlet fan reaches the preset gear position, or detect whether the difference between the thermal protection temperature of the laser component and the current temperature is within a second preset temperature range, or detect whether the outlet temperature of the air outlet fan is less than the preset temperature.

3. The method according to claim 2, characterized in that The laser projection device includes a first temperature sensor; When the ambient temperature is within a first preset temperature range, controlling the heating component to heat the air entering the housing specifically includes: Controlling the first temperature sensor to detect the ambient temperature, and when the ambient temperature is within a first preset temperature range, controlling the heating component to heat the air entering the housing; After a first preset time has passed, the laser assembly is controlled to be powered on.

4. The method according to claim 2, characterized in that: The laser projection device includes a first temperature sensor; When the ambient temperature is within a first preset temperature range, controlling the heating component to heat the air entering the housing specifically includes: After the laser assembly is powered on, the first temperature sensor is controlled to detect the ambient temperature; When the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air entering the housing, and the air inlet fan and the air outlet fan are controlled to work in an initial gear position in advance; After the preset time has passed, detecting whether the medium in the heat pipe in the heat dissipation component is frozen specifically includes: After a first preset time has passed, it is detected whether the current gear position of the air inlet fan and / or the air outlet fan reaches the preset gear position.

5. The method according to claim 2, characterized in that: The laser projection device includes a first temperature sensor and a second temperature sensor; When the ambient temperature is within a first preset temperature range, controlling the heating component to heat the air entering the housing specifically includes: After the laser assembly is powered on, the first temperature sensor is controlled to detect the ambient temperature; When the ambient temperature is within a first preset temperature range, the heating component is controlled to heat the air entering the housing, and the air inlet fan and the air outlet fan are controlled to work fixedly at an initial gear position; After the preset time has passed, detecting whether the medium in the heat pipe in the heat dissipation component is frozen specifically includes: After a first preset time has passed, the second temperature sensor is controlled to detect the current temperature of the laser assembly, and a difference between the thermal protection temperature and the current temperature is compared to determine whether it is within a second preset temperature range.

6. The method according to claim 2, characterized in that The laser projection device includes a first temperature sensor and a third temperature sensor; When the ambient temperature is within a first preset temperature range, controlling the heating component to heat the air entering the housing specifically includes: After the laser assembly is powered on, the first temperature sensor is controlled to detect the ambient temperature; When the ambient temperature is within a first preset temperature range, controlling the heating component to heat the air entering the housing; After the preset time has passed, detecting whether the medium in the heat pipe in the heat dissipation component is frozen specifically includes: After a second preset time has passed, the third temperature sensor is controlled to detect the outlet air temperature of the outlet fan, and a comparison is made to see whether the outlet air temperature is less than a preset temperature.

7. The method according to any one of claims 4 to 6, characterized in that: After the preset time has passed, before detecting whether the medium in the heat pipe in the heat dissipation component is frozen, the method further includes: When the ambient temperature is outside the first preset temperature range, after a first preset time, it is determined whether the ambient temperature is within the first preset temperature range, or whether the ambient temperature is greater than the first preset temperature threshold and less than or equal to the third preset temperature threshold, and whether the current gear position of the air inlet fan and / or the air outlet fan reaches the preset gear position, or whether the difference between the thermal protection temperature of the laser assembly and the current temperature is within the second preset temperature range; When the ambient temperature is within the first preset temperature range, or when the ambient temperature is greater than the first preset temperature threshold and less than or equal to the third preset temperature threshold and the current gear of the air inlet fan and / or the air outlet fan reaches the preset gear, or when the difference between the thermal protection temperature of the laser component and the current temperature is within the second preset temperature range, the heating component is controlled to heat the air entering the shell.

8. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: When the ambient temperature is greater than a third preset temperature threshold, the heating component is controlled to stop heating the air entering the shell.

9. The method according to any one of claims 1 to 6, characterized in that: The step of controlling the heating component to heat the air entering the housing specifically includes: Controlling the heating component to operate at an initial gear position to heat the air in the housing; The controlling the heating component to increase the heating temperature of the air entering the housing specifically includes: The heating component is controlled to operate at a preset gear position to increase the heating temperature of the air entering the shell.

10. A laser projection device, characterized in that: The device comprises: A housing, a laser assembly, a heat dissipation assembly, a heating assembly and a processing assembly located in the housing; The heat dissipation component is configured to dissipate heat for the laser component; The processing component is configured to control the heating component to heat the air entering the housing to increase the temperature of the air in the housing when the ambient temperature is within a first preset temperature range; After a preset time, it is detected whether the medium in the heat pipe in the heat dissipation component is frozen. If so, the heating component is controlled to increase the heating temperature of the air entering the shell. If not, the heating component is controlled to maintain the heating temperature of the air entering the shell.

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