CN115474031A

CN115474031A - Projection equipment heat dissipation method and device, projection equipment and storage medium

Info

Publication number: CN115474031A
Application number: CN202211110030.9A
Authority: CN
Inventors: 胡全友; 谭大治; 江浩
Original assignee: Formovie Chongqing Innovative Technology Co Ltd
Current assignee: Formovie Chongqing Innovative Technology Co Ltd
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2022-12-13

Abstract

The application relates to a projection equipment heat dissipation method, a projection equipment heat dissipation device, projection equipment and a storage medium. The method comprises the following steps: acquiring an ambient temperature and a device temperature of a target device in projection equipment according to a preset time interval; adjusting and identifying the brightness of the projection equipment according to at least one of the acquired current environment temperature and the current device temperature of the target device; if the brightness adjustment identification result indicates that the brightness needs to be adjusted, switching the brightness mode of the projection equipment; under the switched brightness mode, adjusting the rotating speed of a fan in the projection equipment according to the current temperature difference and the previous temperature difference so as to radiate the projection equipment; wherein the current temperature difference is a difference between a current device temperature and a preset target device temperature; the prior temperature difference is a difference between at least a device temperature acquired prior to a current device temperature and the target device temperature. By adopting the method, the heat dissipation effect of the projection equipment can be improved.

Description

Projection equipment heat dissipation method and device, projection equipment and storage medium

Technical Field

The present application relates to the field of projection devices, and in particular, to a method and an apparatus for dissipating heat of a projection device, and a storage medium.

Background

With the development of science and technology, projection equipment is more and more popular, and can be applied to various scenes such as offices, families, public places and the like. In the using process, some devices in the projection equipment generate heat, and in order to dissipate heat, a fan is generally adopted to rotate to drive air to flow so as to take away heat, so that the heat dissipation of the projection equipment is realized, and the normal use of the projection equipment is maintained. In the process of radiating the projection equipment by the fan, along with the change of the temperature of the device, the rotating speed of the fan needs to be adjusted so as to achieve the purpose of energy conservation.

In the conventional method, a step regulation method is generally adopted to regulate the rotation speed of a fan in the projection equipment, the temperature is divided into a plurality of levels, and when the temperature of a device in the projection equipment reaches a certain temperature level, the rotation speed of the fan is regulated to the rotation speed corresponding to the temperature level. However, the heat dissipation method of the projection apparatus is relatively limited in effect, and noise is likely to suddenly change due to sudden change of the rotation speed of the fan.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a method and an apparatus for dissipating heat of a projection device, and a computer-readable storage medium, which can improve heat dissipation effect.

In a first aspect, the present application provides a method for dissipating heat of a projection device. The method comprises the following steps:

collecting the ambient temperature and the device temperature of a target device in the projection equipment according to a preset time interval; the target device is a device which generates heat in the projection equipment;

adjusting and identifying the brightness of the projection equipment according to at least one of the acquired current environment temperature and the current device temperature of the target device;

if the brightness adjustment identification result indicates that the brightness needs to be adjusted, switching the brightness mode of the projection equipment;

under the switched brightness mode, adjusting the rotating speed of a fan in the projection equipment according to the current temperature difference and the previous temperature difference so as to radiate the projection equipment;

wherein the current temperature difference is a difference between a current device temperature and a preset target device temperature; the prior temperature difference is a difference between at least one device temperature acquired prior to a current device temperature and the target device temperature.

In a second aspect, the present application further provides a heat dissipation device for a projection apparatus. The device comprises:

the temperature acquisition module is used for acquiring the ambient temperature and the device temperature of a target device in the projection equipment according to a preset time interval; the target device is a device which generates heat in the projection equipment;

the brightness adjusting module is used for adjusting and identifying the brightness of the projection equipment according to at least one of the acquired current environment temperature and the current device temperature of the target device; if the brightness adjustment identification result indicates that the brightness needs to be adjusted, switching the brightness mode of the projection equipment;

the rotating speed regulating module is used for regulating the rotating speed of a fan in the projection equipment according to the current temperature difference and the previous temperature difference in the switched brightness mode so as to dissipate heat of the projection equipment;

wherein the current temperature difference is a difference between a current device temperature and a preset target device temperature; the prior temperature difference is a difference between at least a device temperature acquired prior to a current device temperature and the target device temperature.

In one embodiment, the brightness adjustment module is further configured to switch the projection device to the energy-saving brightness mode if the brightness adjustment identification result indicates that the projection device needs to be switched to the energy-saving brightness mode;

the rotating speed regulation and control module is further used for regulating the rotating speed of a fan in the projection equipment according to the current temperature difference and the previous temperature difference under the switched energy-saving brightness mode so as to dissipate heat of the projection equipment.

In one embodiment, the brightness adjustment module is further configured to exit the energy-saving brightness mode to switch to a normal brightness mode if the ambient temperature collected in the energy-saving brightness mode meets a preset energy-saving mode exit condition;

the rotating speed regulation and control module is further used for regulating the rotating speed of a fan in the projection equipment according to the current temperature difference and the previous temperature difference in the switched normal brightness mode so as to dissipate heat of the projection equipment.

In one embodiment, the brightness adjustment module is further configured to perform at least one of the following steps:

if the current environment temperature is greater than or equal to a first preset energy-saving temperature threshold value, judging that the projection equipment needs to be switched to an energy-saving brightness mode;

and if the current device temperature is greater than or equal to a second preset energy-saving temperature threshold value and the rotation speed related control quantity of the fan reaches a preset maximum amplitude limit, judging that the projection equipment needs to be switched to an energy-saving brightness mode.

In one embodiment, the apparatus further comprises:

and the abnormity judgment module is used for closing the projection equipment if at least one of the acquired current environment temperature and the current device temperature of the target device is greater than or equal to a corresponding preset shutdown temperature threshold value.

In one embodiment, the temperature acquisition module is further configured to perform the step of acquiring the ambient temperature and the device temperature of the target device in the projection apparatus at preset time intervals after the projection apparatus is powered on;

the rotating speed regulating module is also used for controlling the fan to operate at an initial rotating speed under the condition that the collected current environment temperature is smaller than a corresponding preset shutdown temperature threshold value;

the brightness adjusting module is further configured to execute brightness adjustment identification and subsequent steps on the projection apparatus according to at least one of the acquired current ambient temperature and the acquired current device temperature of the target device until a difference between the current device temperature of the target device and the target device temperature meets a preset brightness adjustment identification condition.

In a third aspect, the present application further provides a projection apparatus. The projection device comprises a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the heat dissipation method of the projection device according to the embodiments of the present application.

In a fourth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium has a computer program stored thereon, and when the computer program is executed by a processor, the processor is caused to execute the steps in the heat dissipation method for a projection apparatus according to the embodiments of the present application.

According to the projection equipment heat dissipation method, the projection equipment heat dissipation device, the projection equipment and the storage medium, the environment temperature and the device temperature of a target device in the projection equipment are collected according to the preset time interval, the brightness of the projection equipment is adjusted and identified according to at least one of the collected current environment temperature and the collected current device temperature of the target device, if the brightness adjustment identification result indicates that the brightness needs to be adjusted, the brightness mode of the projection equipment is switched, and the brightness of the projection equipment can be intelligently adapted to the current environment temperature and the current device temperature. And under the switched brightness mode, the rotating speed of the fan in the projection equipment is adjusted according to the current temperature difference and the previous temperature difference so as to radiate the projection equipment, thereby realizing stepless speed regulation and avoiding noise mutation caused by mutation of the rotating speed of the fan. The switching of the brightness mode of the projection equipment is combined with the stepless speed regulation of the fan, so that the heat dissipation control of the projection equipment is realized together, the heat dissipation control of the projection equipment is more intelligent, and the heat dissipation effect is improved.

Drawings

FIG. 1 is a flow chart illustrating a method for dissipating heat of a projection apparatus according to an embodiment;

FIG. 2 is a schematic diagram illustrating an overall flowchart of a heat dissipation method of a projection apparatus according to an embodiment;

FIG. 3 is a block diagram showing an overall configuration of a projection apparatus according to an embodiment;

FIG. 4 is a flowchart illustrating a heat dissipation method of a projection apparatus according to an embodiment;

FIG. 5 is a block diagram of a heat sink of an embodiment of a projection device;

FIG. 6 is a block diagram of a heat sink of another embodiment of a projection apparatus;

fig. 7 is an internal structural view of a projection apparatus in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In an embodiment, as shown in fig. 1, a method for dissipating heat of a projection device is provided, and this embodiment is illustrated by applying the method to the projection device, it is to be understood that the method may also be applied to a terminal, the terminal and the projection device may communicate through, but not limited to, a network connection or a bluetooth connection, and the projection device is controlled by the terminal to dissipate heat of the projection device. The terminal can be but not limited to various personal computers, notebook computers, smart phones, tablet computers, internet of things equipment and portable wearable equipment, and the internet of things equipment can be smart sound boxes, smart televisions, smart air conditioners, smart vehicle-mounted equipment and the like. The portable wearable device can be a smart watch, a smart bracelet, a head-mounted device, and the like. In this embodiment, the method includes the steps of:

step 102, collecting an ambient temperature and a device temperature of a target device in projection equipment according to a preset time interval; the target device is a device that generates heat in the projection apparatus.

The projection device is a device capable of projecting an image or video onto another object. Such as: projected on a curtain or wall, etc. The ambient temperature refers to the temperature in the environment in which the projection device is located. The device temperature refers to the temperature of the target device itself.

In one embodiment, the target device may be an opto-mechanical device or an on-board device in the projection apparatus, or the like. In one embodiment, the opto-mechanical Device may include at least one of a laser, a Digital Micromirror Device (DMD), a color wheel, or the like. The on-board device may include a chip or the like.

In one embodiment, the projection apparatus is turned off if at least one of the acquired current ambient temperature and the current device temperature of the target device meets a corresponding preset turn-off condition. And if at least one of the acquired current environment temperature and the current device temperature of the target device does not accord with the preset shutdown condition, performing brightness adjustment identification and subsequent steps on the projection equipment according to at least one of the acquired current environment temperature and the current device temperature of the target device. The preset shutdown condition is a preset condition for judging whether shutdown is required.

And 104, performing brightness adjustment identification on the projection equipment according to at least one of the acquired current environment temperature and the current device temperature of the target device.

The brightness adjustment identification is processing for identifying whether the projection equipment needs to adjust the brightness.

In one embodiment, the projection device may determine whether the projection device needs to adjust the brightness according to at least one of the acquired current ambient temperature and the current device temperature of the target device. And if the brightness needs to be adjusted, switching the brightness mode of the projection equipment. If the brightness is not required to be adjusted, the brightness of the projection equipment is kept unchanged.

And 106, if the brightness adjustment identification result indicates that the brightness needs to be adjusted, switching the brightness mode of the projection equipment.

The brightness mode refers to a mode divided for different brightness of the projection device.

In one embodiment, the projection device may perform brightness adjustment recognition according to the current ambient temperature, and switch the brightness mode of the projection device if the brightness adjustment recognition result according to the current ambient temperature indicates that the brightness needs to be adjusted. If the brightness adjustment identification result according to the current environment temperature indicates that the brightness does not need to be adjusted, the projection equipment can perform brightness adjustment identification according to the current device temperature. And if the brightness adjustment identification result according to the current device temperature indicates that the brightness needs to be adjusted, switching the brightness mode of the projection equipment. And if the brightness adjustment identification result according to the current device temperature indicates that the brightness does not need to be adjusted, keeping the brightness of the projection equipment unchanged.

In one embodiment, the luminance modes may include at least a power-saving luminance mode and a normal luminance mode, and the like.

In an embodiment, if the current ambient temperature meets the corresponding first preset energy saving condition, the projection device may determine that it needs to switch to the energy saving luminance mode, and then the projection device may switch to the energy saving luminance mode. The first preset energy-saving condition is a preset condition for judging whether to switch to the energy-saving brightness mode according to the current ambient temperature.

In an embodiment, if the current device temperature meets the second preset energy saving condition, the projection apparatus may determine that the projection apparatus needs to switch to the energy saving luminance mode, and then the projection apparatus may switch to the energy saving luminance mode. The second preset energy-saving condition is a preset condition for judging whether to switch to the energy-saving brightness mode according to the current device temperature.

And 108, in the switched brightness mode, adjusting the rotating speed of a fan in the projection equipment according to the current temperature difference and the previous temperature difference so as to dissipate the heat of the projection equipment.

Wherein the current temperature difference is a difference between the current device temperature and a preset target device temperature; the prior temperature difference is a difference between at least a device temperature acquired prior to the current device temperature and the target device temperature.

The target device temperature refers to a preset target temperature to which the device temperature of the target device reaches.

In one embodiment, the prior temperature difference may be one or two, i.e., the prior temperature difference may be the difference between the device temperature collected once or twice before the current device temperature and the target device temperature.

In one embodiment, if the previous temperature difference is two, the projection device may adjust a rotation speed of a fan in the projection device according to a Proportional-Integral-Derivative (PID) control algorithm based on the current temperature difference and the previous temperature difference.

In one embodiment, if the previous temperature difference is one, the projection device may adjust the rotation speed of a fan in the projection device according to a Proportional Integral (PI) control algorithm or a Proportional Derivative (PD) control algorithm based on the current temperature difference and the previous temperature difference.

In one embodiment, the projection apparatus may determine a regulation value of the rotation speed-related control amount of the fan based on the current temperature difference and the previous temperature difference in the switched luminance mode, and then change the rotation speed-related control amount according to the regulation value to adjust the rotation speed of the fan.

The rotation speed-related control amount is a control amount for changing the rotation speed of the fan. The rotation speed of the fan can be adjusted by changing the rotation speed-dependent control amount.

In one embodiment, the rotation speed-related control amount may be any one of a duty ratio, a voltage, or the like.

In one embodiment, the regulation value may be a variation amount of the rotation speed-related control amount. In other embodiments, the regulation value may be a target value of the rotation speed-related control amount.

It is understood that the projection apparatus continuously acquires the ambient temperature and the device temperature of the target device in the projection apparatus at preset time intervals in the switched luminance mode, and the current device temperature used for adjusting the rotation speed of the fan in the projection apparatus in the switched luminance mode is the device temperature acquired in the switched luminance mode.

In one embodiment, if the rotation speed related control quantity after being changed according to the regulation value is smaller than the preset minimum amplitude limit, the rotation speed related control quantity is changed to the preset minimum amplitude limit. And if the rotating speed related control quantity changed according to the regulating value is larger than the preset maximum amplitude limit, changing the rotating speed related control quantity to the preset maximum amplitude limit. The preset minimum amplitude limit is the minimum value that the preset rotation speed related control quantity can reach. The preset maximum amplitude limit is the maximum value which can be reached by the preset rotation speed related control quantity. In this embodiment, the limitation of the rotation speed of the fan is realized by limiting the rotation speed related control quantity, and the over-regulation of the rotation speed of the fan is avoided. Through presetting minimum amplitude limiting, the minimum rotational speed of fan has been restricted, guarantees the normal work of accuse temperature device in the projection equipment complete machine for projection equipment can provide abundant function, for example: a screen-off mode or an audio mode. The maximum rotating speed of the fan is limited by presetting the maximum amplitude limit, and the noise level of the projection equipment at high temperature can be controlled.

In an embodiment, as shown in fig. 2, an overall flowchart of a heat dissipation method for a projection apparatus in the embodiments of the present application is schematically illustrated. The method comprises the steps that firstly, the projection equipment can obtain the current environment temperature and the current device temperature, then whether preset shutdown conditions are met or not is judged according to at least one of the current environment temperature and the current device temperature, if the preset shutdown conditions are not met, the subsequent process is continued, whether brightness needs to be adjusted or not is judged according to at least one of the current environment temperature and the current device temperature, and finally the rotating speed of a fan is adjusted through a PID control algorithm.

In an embodiment, after the projection device is turned on, the projection device reads each configuration parameter from a preset heat dissipation configuration file, and executes the heat dissipation method of the projection device in each embodiment according to each configuration parameter. The heat dissipation configuration file is used for recording configuration parameters required to be used in the heat dissipation process of the projection equipment. In one embodiment, the configuration parameters may include various thresholds used in heat dissipation of the projection device, adjustment factors, and the like.

In one embodiment, a developer may write each configuration parameter in a heat dissipation configuration file through a terminal in advance, adjust each configuration parameter, and write the heat dissipation configuration file into the projection device.

In one embodiment, as shown in fig. 3, the projection device may include a data reading module, a temperature acquisition module, an abnormality determination module, a brightness adjustment module, and a rotation speed adjustment module. After the projection equipment is started, reading each configuration parameter from a heat dissipation configuration file through a data reading module, acquiring the environment temperature and the device temperature of a target device in the projection equipment according to a preset time interval through a temperature acquisition module, judging whether the projection equipment needs to be closed or not through an abnormality judgment module, performing brightness adjustment identification through a brightness adjustment module, entering or exiting an energy-saving brightness mode according to a brightness adjustment identification result, and finally adjusting the rotating speed of a fan through a rotating speed adjustment module in the switched brightness mode.

The projection equipment heat dissipation method comprises the steps of collecting the ambient temperature and the device temperature of a target device in the projection equipment according to a preset time interval, conducting brightness adjustment identification on the projection equipment according to at least one of the collected current ambient temperature and the current device temperature of the target device, switching the brightness mode of the projection equipment if the brightness adjustment identification result indicates that the brightness needs to be adjusted, enabling the brightness of the projection equipment to be intelligently adaptive to the current ambient temperature and the current device temperature, and adjusting the rotating speed of a fan in the projection equipment according to the current temperature difference and the previous temperature difference in the switched brightness mode to dissipate heat of the projection equipment, so that stepless speed regulation is achieved, and noise mutation caused by mutation of the rotating speed of the fan is avoided. The switching of the brightness mode of the projection equipment is combined with the stepless speed regulation of the fan, so that the heat dissipation control of the projection equipment is realized together, the heat dissipation control of the projection equipment is more intelligent, the heat dissipation effect is improved, and the service life of the fan is prolonged.

In one embodiment, if the brightness adjustment recognition result indicates that the brightness needs to be adjusted, switching the brightness mode of the projection device includes: if the brightness adjustment identification result indicates that the energy-saving brightness mode needs to be switched, switching the projection equipment to the energy-saving brightness mode; in the switched brightness mode, adjusting the rotation speed of a fan in the projection device according to the current temperature difference and the previous temperature difference to dissipate heat of the projection device comprises: and under the switched energy-saving brightness mode, adjusting the rotating speed of a fan in the projection equipment according to the current temperature difference and the previous temperature difference so as to dissipate the heat of the projection equipment.

Among them, the energy saving brightness mode (ECO) is a mode in which the current of the optical device in the projection apparatus is reduced to reduce the brightness.

Specifically, if the brightness adjustment recognition result of the projection device indicates that the projection device needs to be switched to the energy-saving brightness mode, the projection device is switched to the energy-saving brightness mode, the projection device can adjust the rotating speed of a fan in the projection device according to the current temperature difference and the previous temperature difference in the switched energy-saving brightness mode to dissipate heat of the projection device, continuously acquire the ambient temperature and the device temperature of a target device in the projection device according to a preset time interval, and perform brightness adjustment recognition on the projection device according to at least one of the acquired current ambient temperature and the acquired current device temperature of the target device.

In one embodiment, if the brightness adjustment recognition result of the projection device indicates that the energy-saving brightness mode needs to be switched, the projection device may change the rotation speed related control amount to the preset maximum amplitude limit, and then switch the projection device to the energy-saving brightness mode.

The preset maximum amplitude limit is the maximum value that the preset rotation speed related control quantity can reach.

In the above embodiment, the projection device may be switched to the energy-saving brightness mode, so that power consumption is reduced, heat generated by a target device is reduced, the projection device may normally operate at a higher ambient temperature, stepless speed regulation may be performed on the fan according to a current temperature difference and a previous temperature difference in the energy-saving brightness mode, sudden noise change caused by sudden fan speed change is avoided, the energy-saving brightness mode is combined with the stepless speed regulation of the fan, and a heat dissipation effect is improved.

In one embodiment, the method further comprises: if the ambient temperature collected in the energy-saving brightness mode meets a preset energy-saving mode exit condition, exiting the energy-saving brightness mode to switch to a normal brightness mode; and under the switched normal brightness mode, adjusting the rotating speed of a fan in the projection equipment according to the current temperature difference and the previous temperature difference so as to dissipate the heat of the projection equipment.

The energy-saving mode exit condition is a preset condition for judging whether the energy-saving brightness mode needs to be exited or not. The normal brightness mode is a mode in which the brightness of the projection apparatus is normal.

Specifically, if the ambient temperature collected in the energy-saving brightness mode meets a preset energy-saving mode exit condition, the projection device may exit the energy-saving brightness mode to switch to the normal brightness mode, and the projection device may adjust the rotation speed of the fan in the projection device according to the current temperature difference and the previous temperature difference in the switched normal brightness mode to dissipate heat of the projection device, continuously collect the ambient temperature and the device temperature of the target device in the projection device according to a preset time interval, and perform brightness adjustment recognition on the projection device according to at least one of the collected current ambient temperature and the collected current device temperature of the target device.

In one embodiment, the energy-saving brightness mode is exited if the ambient temperature collected in the energy-saving brightness mode is less than a first preset exit energy-saving temperature threshold. The first preset exit energy-saving temperature threshold is a preset temperature threshold for judging whether to exit the energy-saving brightness mode according to the ambient temperature.

In other embodiments, if the device temperature acquired in the energy-saving brightness mode is less than a second preset exit energy-saving temperature threshold, the energy-saving brightness mode exits, and in the switched normal brightness mode, the rotation speed of the fan in the projection device is adjusted according to the current temperature difference and the previous temperature difference, so as to dissipate heat of the projection device. The second preset exit energy-saving temperature threshold is a preset temperature threshold for judging whether to exit the energy-saving brightness mode according to the device temperature.

In the embodiment, the projection equipment can be switched to the normal brightness mode, so that the brightness of the projection equipment can be intelligently adapted to the current environment temperature and the current device temperature, and the fan is subjected to stepless speed regulation according to the current temperature difference and the previous temperature difference in the normal brightness mode, so that the sudden change of noise caused by the sudden change of the rotating speed of the fan is avoided, and the heat dissipation effect is improved.

In one embodiment, the brightness adjustment recognition of the projection device based on at least one of the acquired current ambient temperature and the current device temperature of the target device comprises at least one of: if the current environment temperature is greater than or equal to a first preset energy-saving temperature threshold value, judging that the projection equipment needs to be switched to an energy-saving brightness mode; and if the current device temperature is greater than or equal to a second preset energy-saving temperature threshold and the rotation speed associated control quantity of the fan reaches a preset maximum amplitude limit, judging that the projection equipment needs to be switched to an energy-saving brightness mode.

The first preset energy-saving temperature threshold is a preset temperature threshold used for judging whether to switch to the energy-saving brightness mode according to the current environment temperature. The second preset energy-saving temperature threshold is a preset temperature threshold for judging whether to switch to the energy-saving brightness mode according to the current device temperature.

In one embodiment, if the current ambient temperature is greater than or equal to the first preset energy-saving temperature threshold, the projection device may determine that it is necessary to switch to the energy-saving brightness mode. And if the current environment temperature is less than the first preset energy-saving temperature threshold, the current device temperature is greater than or equal to the second preset energy-saving temperature threshold, and the rotation speed associated control quantity of the fan reaches the preset maximum amplitude limit, judging that the projection equipment needs to be switched to an energy-saving brightness mode. If the current environment temperature is less than the first preset energy-saving temperature threshold value, and the current device temperature is less than the second preset energy-saving temperature threshold value or the rotation speed related control quantity of the fan does not reach the preset maximum amplitude limit, it is determined that the projection equipment does not need to be switched to the energy-saving brightness mode, and the projection equipment can continue to maintain the normal brightness mode.

In one embodiment, if the current ambient temperature is greater than or equal to the first preset energy-saving temperature threshold, the projection apparatus may determine that it is necessary to switch to the energy-saving brightness mode, change the rotation speed related control amount to the preset maximum clipping, and then switch the projection apparatus to the energy-saving brightness mode.

In the above embodiment, when the current ambient temperature is greater than or equal to the first preset energy-saving temperature threshold, or the current device temperature is greater than or equal to the second preset energy-saving temperature threshold, and the rotation speed related control amount of the fan reaches the preset maximum amplitude limit, it is determined that the power consumption needs to be switched to the energy-saving brightness mode, so that the power consumption can be reduced by switching to the energy-saving brightness mode when the ambient temperature or the device temperature is higher, and the heat generated by the target device is reduced. Under the condition that the current device temperature is greater than or equal to the second preset energy-saving temperature threshold value and the rotating speed related control quantity of the fan does not reach the preset maximum amplitude limit, the device does not need to be switched to the energy-saving brightness mode, and the rotating speed related control quantity of the fan does not reach the preset maximum amplitude limit, so that the rotating speed of the fan can be adjusted by adjusting the rotating speed related control quantity under the condition that the rotating speed related control quantity of the fan does not reach the preset maximum amplitude limit, the device temperature is reduced, the device does not need to enter the energy-saving brightness mode at the moment, the switching of the brightness mode is combined with the adjustment of the rotating speed of the fan, the heat dissipation control of the projection equipment is more intelligent, unnecessary processing is avoided, and the heat dissipation effect is improved.

In one embodiment, before performing brightness adjustment identification on the projection device according to at least one of the acquired current ambient temperature and the current device temperature of the target device, the method further comprises: and if at least one of the acquired current environment temperature and the current device temperature of the target device is greater than or equal to the corresponding preset shutdown temperature threshold, shutting down the projection equipment.

The preset shutdown temperature threshold is a preset temperature threshold for judging whether the projection device needs to be shut down.

In one embodiment, the preset shutdown temperature threshold may include a first preset shutdown temperature threshold and a second preset shutdown temperature threshold. The first preset shutdown temperature threshold is a preset temperature threshold for judging whether the projection equipment needs to be shut down according to the current ambient temperature. The second preset shutdown temperature threshold is a preset temperature threshold for judging whether the projection device needs to be shut down according to the current device temperature.

In one embodiment, if the current ambient temperature is greater than or equal to the first preset shutdown temperature threshold, the projection device is shut down. And if the current environment temperature is less than the first preset shutdown temperature threshold and the current device temperature is greater than or equal to the second preset shutdown temperature threshold, the projection equipment is closed. And if the current environment temperature is less than a first preset shutdown temperature threshold and the current device temperature is less than a second preset shutdown temperature threshold, executing brightness adjustment identification and subsequent steps of the projection equipment according to at least one of the acquired current environment temperature and the current device temperature of the target device.

In the above embodiment, if at least one of the acquired current ambient temperature and the current device temperature of the target device is greater than or equal to the corresponding preset shutdown temperature threshold, the projection device is shut down, so that damage to the projection device due to an excessively high ambient temperature or device temperature can be avoided, and the service life of the projection device is prolonged.

In one embodiment, before performing brightness adjustment identification on the projection device according to at least one of the acquired current ambient temperature and the current device temperature of the target device, the method further comprises: after the projection equipment is started, acquiring the ambient temperature and the device temperature of a target device in the projection equipment according to a preset time interval; controlling the fan to operate at an initial rotating speed under the condition that the acquired current environment temperature is less than a corresponding preset shutdown temperature threshold value; and performing brightness adjustment identification and subsequent steps on the projection equipment according to at least one of the acquired current environment temperature and the current device temperature of the target device until the difference between the current device temperature of the target device and the target device temperature meets the preset brightness adjustment identification condition.

The preset brightness adjustment identification condition is a preset condition for judging whether brightness adjustment identification can be started or not.

Specifically, after the projection apparatus is turned on, the projection apparatus may acquire the ambient temperature and the device temperature of the target device in the projection apparatus at preset time intervals. And if the current environment temperature is greater than or equal to the corresponding preset shutdown temperature threshold, the projection equipment is shut down. And if the current environment temperature is lower than the corresponding preset shutdown temperature threshold, controlling the fan to operate at the initial rotating speed, and identifying whether the preset brightness adjustment identification condition is met or not according to the difference between the current device temperature and the target device temperature. And if the difference between the current device temperature and the target device temperature does not accord with the preset brightness adjustment identification condition, continuing to control the fan to operate at the initial rotating speed. And if the difference between the current device temperature and the target device temperature meets the preset brightness adjustment identification condition, executing brightness adjustment identification and subsequent steps of the projection equipment according to at least one of the acquired current environment temperature and the acquired current device temperature of the target device.

In one embodiment, the preset brightness adjustment recognition condition may be that a difference between the current device temperature and the target device temperature is less than or equal to a preset temperature difference threshold.

In one embodiment, if the difference between the current device temperature and the target device temperature is greater than the predetermined temperature difference threshold, the predetermined brightness adjustment recognition condition is not met, and the projection apparatus may continue to control the fan to operate at the initial rotation speed. If the difference between the current device temperature and the target device temperature is smaller than or equal to the preset temperature difference threshold, the preset brightness adjustment recognition condition is met, and the projection equipment can execute brightness adjustment recognition and subsequent steps on the projection equipment according to at least one of the acquired current environment temperature and the current device temperature of the target device.

In one embodiment, if the difference between the current device temperature and the target device temperature meets a preset brightness adjustment identification condition and the current device temperature is less than a corresponding preset shutdown temperature threshold, brightness adjustment identification and subsequent steps of the projection equipment are performed according to at least one of the acquired current ambient temperature and the acquired current device temperature of the target device. And if the difference between the current device temperature and the target device temperature meets the preset brightness adjustment identification condition and the current device temperature is greater than or equal to the corresponding preset shutdown temperature threshold, shutting down the projection equipment.

It can be understood that when the projection apparatus is just started, the device temperature is relatively low, the difference between the current device temperature and the target device temperature is relatively large at this time, the device temperature needs a period of time to rise, the fan speed is relatively low, and the fan does not need to be regulated, even if the subsequent processes of brightness adjustment identification and fan speed adjustment are started at this time, the obtained fan speed-related control quantity is also the minimum value, so that the brightness adjustment identification and the fan speed adjustment are not needed at this time.

In the above embodiment, after the projection apparatus is started, the fan operates at the initial rotation speed, the rotation speed of the fan does not need to be adjusted, and brightness adjustment identification and fan rotation speed adjustment are not started until the difference between the current device temperature and the target device temperature meets the preset brightness adjustment identification condition, so that unnecessary programs are reduced, energy waste and extension of starting time are avoided, resources are saved, and starting efficiency is improved.

In one embodiment, the prior temperature differential comprises a first temperature differential and a second temperature differential; in the switched brightness mode, adjusting the rotation speed of a fan in the projection device according to the current temperature difference and the previous temperature difference to dissipate heat of the projection device comprises: under the switched brightness mode, according to a proportional-integral-derivative control algorithm, determining a regulation value of the rotation speed related control quantity of the fan according to the current temperature difference, the first temperature difference and the second temperature difference; changing the rotation speed related control quantity according to the regulation value so as to regulate the rotation speed of the fan; the first temperature difference and the second temperature difference are differences between the two device temperatures acquired before the current device temperature and the target device temperature respectively.

The Proportional-Integral-Derivative (PID) control algorithm is an algorithm for controlling Proportional, integral and Derivative of an error generated by comparing information acquired by real-time data of a controlled object with a given value.

In one embodiment, according to the pid control algorithm, the regulation value for determining the rotation speed-related control amount of the fan according to the current temperature difference, the first temperature difference, and the second temperature difference may be represented by the following formula:

Δp＝Kp*[e(t)-e(t1)]+Ki*e(t)+Kd*[e(t)+e(t2)-2*e(t1)]；(1)

wherein, Δ p is a regulation value of the rotation speed related control quantity, e (t) is a current temperature difference, e (t 1) and e (t 2) are previous temperature differences, t1 and t2 are time points of acquiring the temperature of the device respectively, kp, ki and Kd are adjusting coefficients in a proportional-integral-derivative control algorithm respectively, and Kp, ki and Kd can be preset constants.

In one embodiment, adjusting the fan speed according to a pid control algorithm may be implemented with the following code:

e(t)＝To-Tm

Δp＝a*[e(t)-e(t1)]+b*e(t)+c*[e(t)+e(t2)-2*e(t1)]

Pw+＝Δp

if(Pw<Pmin)Pw＝Pmin

else if(Pw>Pmax)Pw＝Pmax

e(t2)＝e(t1)

e(t1)＝e(t)

wherein To is a target device temperature, tm is a current device temperature, e (t) is a current temperature difference, Δ p = a × [ e (t) -e (t 1) ] + b × [ e (t) + c × [ e (t) + e (t 2) -2 × (t 1) ] has the same meaning as formula (1), pw is a rotation speed-related control amount, and Pw + = Δ p indicates a change in the rotation speed-related control amount in accordance with a control value. Pmin is a preset minimum amplitude limit, and Pmax is a preset maximum amplitude limit. if (Pw < Pmin) Pw = Pmin indicates that the rotation speed-related control amount is changed to the preset minimum limiter if the rotation speed-related control amount changed according to the control value is smaller than the preset minimum limiter. else if (Pw > Pmax) Pw = Pmax indicates that if the rotation speed related control quantity changed according to the control value is greater than the preset maximum limiter, the rotation speed related control quantity is changed to the preset maximum limiter. e (t 2) = e (t 1) and e (t 1) = e (t) represent updating the previous temperature difference.

In the above embodiment, in the switched brightness mode, according to the pid control algorithm, the regulation value of the rotation speed-related control quantity of the fan is determined according to the current temperature difference, the first temperature difference, and the second temperature difference, and the rotation speed-related control quantity is changed according to the regulation value, so that stepless speed regulation of the rotation speed of the fan is realized, and noise mutation caused by mutation of the rotation speed of the fan is avoided. The switching of the brightness mode of the projection equipment is combined with the stepless speed regulation of the fan, so that the heat dissipation control of the projection equipment is realized together, the heat dissipation control of the projection equipment is more intelligent, and the heat dissipation effect is improved.

Fig. 4 is a schematic specific flowchart of a heat dissipation method for a projection apparatus in various embodiments of the present application. Firstly, after the projection equipment is started, reading configuration parameters, and acquiring the current environment temperature Ta and the current device temperature Tm according to a preset time interval. Judging whether the current environment temperature Ta is greater than or equal to a first preset shutdown temperature threshold Tc, if so, closing the projection equipment; if not, judging whether the difference e (t) between the current device temperature and the target device temperature is less than or equal to a preset temperature difference threshold value C3, if not, controlling the fan to operate at the initial rotating speed, and returning to continuously acquire the current environment temperature Ta and the current device temperature Tm; if yes, judging whether the current device temperature Tm is greater than or equal to a second preset shutdown temperature threshold Tmc, and if yes, shutting down the projection equipment; if not, judging whether the current environment temperature Ta is greater than or equal to a first preset energy-saving temperature threshold value Tei, if so, and if not, switching to an energy-saving brightness mode ECO, namely, entering the ECO, and changing the rotating speed related control quantity p into a preset maximum amplitude limit pmax; if not, judging whether the current device temperature Tm is greater than or equal to a second preset energy-saving temperature threshold Tmei, if so, judging whether the current device temperature Tm is not in an energy-saving brightness mode ECO, and if so, switching to the energy-saving brightness mode, namely, entering the ECO, wherein the rotating speed related control quantity p accords with a preset maximum amplitude limit pmax; if not, the current brightness mode is kept, and PID control is carried out on the fan under the current brightness mode. If the current environment temperature Ta is smaller than a first preset exit energy-saving temperature threshold Teo, if so, exiting the energy-saving brightness mode ECO, carrying out PID control on the rotating speed of the fan in the normal brightness mode, otherwise, continuously maintaining the energy-saving brightness mode, and carrying out PID control on the rotating speed of the fan in the energy-saving brightness mode. And calculating to obtain a rotating speed related control quantity p through a PID control algorithm, adjusting the rotating speed of the fan according to p, and returning to continue executing the whole process.

In one embodiment, the first preset shutdown temperature threshold Tc is greater than a first preset energy saving temperature threshold Tei, which is greater than a first preset exit energy saving temperature threshold Teo.

In one embodiment, the second preset shutdown temperature threshold Tmc is greater than the second preset economizer temperature threshold Tmei.

It should be understood that, although the steps in the flowcharts related to the above embodiments are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the above embodiments may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.

Based on the same inventive concept, the embodiment of the present application further provides a projection device heat dissipation apparatus for implementing the projection device heat dissipation method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the method, so the specific limitations in one or more embodiments of the heat dissipation device for projection equipment provided below may refer to the limitations on the heat dissipation method for projection equipment in the foregoing, and are not described again here.

In one embodiment, as shown in fig. 5, there is provided a heat sink 500 for a projection device, comprising: a temperature acquisition module 502, a brightness adjustment module 504, and a rotation speed regulation module 506, wherein:

a temperature acquisition module 502, configured to acquire an ambient temperature and a device temperature of a target device in the projection apparatus at preset time intervals; the target device is a device that generates heat in the projection apparatus.

The brightness adjusting module 504 is configured to perform brightness adjustment identification on the projection apparatus according to at least one of the acquired current ambient temperature and the current device temperature of the target device; and if the brightness adjustment identification result indicates that the brightness needs to be adjusted, switching the brightness mode of the projection equipment.

And a rotation speed regulating module 506, configured to regulate a rotation speed of a fan in the projection device according to the current temperature difference and the previous temperature difference in the switched brightness mode, so as to dissipate heat of the projection device.

In one embodiment, the brightness adjustment module 504 is further configured to switch the projection device to the energy-saving brightness mode if the brightness adjustment recognition result indicates that the projection device needs to be switched to the energy-saving brightness mode. The rotation speed control module 506 is further configured to adjust a rotation speed of a fan in the projection device according to the current temperature difference and the previous temperature difference in the switched energy-saving brightness mode, so as to dissipate heat of the projection device.

In one embodiment, the brightness adjusting module 504 is further configured to exit the energy-saving brightness mode to switch to the normal brightness mode if the ambient temperature collected in the energy-saving brightness mode meets a preset energy-saving mode exit condition. The rotation speed adjusting module 506 is further configured to adjust a rotation speed of a fan in the projection device according to the current temperature difference and the previous temperature difference in the switched normal brightness mode, so as to dissipate heat of the projection device.

In one embodiment, the brightness adjustment module 504 is further configured to perform at least one of the following steps: if the current environment temperature is greater than or equal to a first preset energy-saving temperature threshold value, judging that the projection equipment needs to be switched to an energy-saving brightness mode; and if the current device temperature is greater than or equal to a second preset energy-saving temperature threshold value and the rotation speed related control quantity of the fan reaches a preset maximum amplitude limit, judging that the projection equipment needs to be switched to an energy-saving brightness mode.

In one embodiment, as shown in fig. 6, the apparatus 500 further comprises:

and an anomaly determination module 508, configured to turn off the projection apparatus if at least one of the acquired current ambient temperature and the current device temperature of the target device is greater than or equal to a corresponding preset shutdown temperature threshold.

In one embodiment, the temperature acquisition module 502 is further configured to perform the step of acquiring the ambient temperature and the device temperature of the target device in the projection apparatus at preset time intervals after the projection apparatus is turned on. The speed control module 506 is further configured to control the fan to operate at an initial speed when the collected current ambient temperature is less than the corresponding preset shutdown temperature threshold. The brightness adjustment module 504 is further configured to perform brightness adjustment identification and subsequent steps on the projection apparatus according to at least one of the acquired current ambient temperature and the acquired current device temperature of the target device until a difference between the current device temperature of the target device and the target device temperature meets a preset brightness adjustment identification condition.

The projection equipment heat dissipation device collects the ambient temperature and the device temperature of a target device in the projection equipment according to the preset time interval, conducts brightness adjustment identification on the projection equipment according to at least one of the collected current ambient temperature and the current device temperature of the target device, switches the brightness mode of the projection equipment if the brightness adjustment identification result indicates that the brightness needs to be adjusted, enables the brightness of the projection equipment to be intelligently adaptive to the current ambient temperature and the current device temperature, adjusts the rotating speed of a fan in the projection equipment according to the current temperature difference and the previous temperature difference in the switched brightness mode, dissipates the stepless speed regulation is achieved, and noise mutation caused by mutation of the rotating speed of the fan is avoided. The switching of the brightness mode of the projection equipment is combined with the stepless speed regulation of the fan, so that the heat dissipation control of the projection equipment is realized together, the heat dissipation control of the projection equipment is more intelligent, and the heat dissipation effect is improved.

All or part of each module in the heat dissipation device of the projection device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent of a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, a projection device is provided, the internal structure of which may be as shown in FIG. 7. The projection device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the projection device is configured to provide computing and control capabilities. The memory of the projection device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operating system and the computer program to run on the non-volatile storage medium. The network interface of the projection device is used for communicating with an external terminal through network connection. The computer program is executed by a processor to implement a method for heat dissipation in a projection device.

It will be appreciated by those skilled in the art that the configuration shown in fig. 7 is a block diagram of only a portion of the configuration associated with the present application, and is not intended to limit the computing device to which the present application may be applied, and that a particular computing device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.

In an embodiment, a projection device is provided, comprising a memory and a processor, wherein the memory has a computer program stored therein, and the processor implements the steps of the above method embodiments when executing the computer program.

In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.

In an embodiment, a computer program product is provided, comprising a computer program which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.

It should be noted that, the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, presented data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high-density embedded nonvolatile Memory, resistive Random Access Memory (ReRAM), magnetic Random Access Memory (MRAM), ferroelectric Random Access Memory (FRAM), phase Change Memory (PCM), graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others. The databases referred to in various embodiments provided herein may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the various embodiments provided herein may be, without limitation, general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, or the like.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A method for dissipating heat of a projection device, the method comprising:

acquiring an ambient temperature and a device temperature of a target device in projection equipment according to a preset time interval; the target device is a device which generates heat in the projection equipment;

performing brightness adjustment identification on the projection equipment according to at least one of the acquired current environment temperature and the current device temperature of the target device;

2. The method of claim 1, wherein switching the brightness mode of the projection device if the brightness adjustment recognition result indicates that the brightness needs to be adjusted comprises:

if the brightness adjustment identification result indicates that the energy-saving brightness mode needs to be switched, switching the projection equipment to the energy-saving brightness mode;

the adjusting the rotation speed of the fan in the projection device according to the current temperature difference and the previous temperature difference in the switched brightness mode to dissipate heat of the projection device comprises:

and under the switched energy-saving brightness mode, adjusting the rotating speed of a fan in the projection equipment according to the current temperature difference and the previous temperature difference so as to radiate the projection equipment.

3. The method of claim 2, further comprising:

if the ambient temperature collected in the energy-saving brightness mode meets a preset energy-saving mode exit condition, exiting the energy-saving brightness mode to switch to a normal brightness mode;

and under the switched normal brightness mode, adjusting the rotating speed of a fan in the projection equipment according to the current temperature difference and the previous temperature difference so as to radiate the projection equipment.

4. The method of claim 1, wherein the brightness adjustment identifying the projection device based on at least one of the acquired current ambient temperature and the current device temperature of the target device comprises at least one of:

5. The method of claim 1, wherein prior to said identifying the brightness adjustment for the projection device based on at least one of the captured current ambient temperature and the current device temperature of the target device, the method further comprises:

and if at least one of the acquired current environment temperature and the current device temperature of the target device is greater than or equal to a corresponding preset shutdown temperature threshold, shutting down the projection equipment.

6. The method of claim 1, wherein prior to said identifying the brightness adjustment for the projection device based on at least one of the captured current ambient temperature and the current device temperature of the target device, the method further comprises:

after the projection equipment is started, the step of collecting the ambient temperature and the device temperature of a target device in the projection equipment according to a preset time interval is executed;

controlling the fan to operate at an initial rotating speed under the condition that the acquired current environment temperature is less than a corresponding preset shutdown temperature threshold value;

and executing brightness adjustment identification and subsequent steps on the projection equipment according to at least one of the acquired current environment temperature and the current device temperature of the target device until the difference between the current device temperature of the target device and the target device temperature meets a preset brightness adjustment identification condition.

7. The method of any one of claims 1 to 6, wherein the prior temperature difference comprises a first temperature difference and a second temperature difference; the adjusting the rotation speed of the fan in the projection device according to the current temperature difference and the previous temperature difference in the switched brightness mode to dissipate the heat of the projection device comprises:

under the switched brightness mode, according to a proportional-integral-derivative control algorithm, determining a regulation value of the rotation speed related control quantity of the fan according to the current temperature difference, the first temperature difference and the second temperature difference;

changing the rotation speed related control quantity according to the regulation value so as to regulate the rotation speed of the fan;

wherein the first temperature difference and the second temperature difference are differences between the target device temperatures and the device temperatures acquired twice before the current device temperature, respectively.

8. A heat sink for a projection device, the heat sink comprising:

9. A projection device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.