CN112162455A - Projector temperature control method, device and equipment and projector - Google Patents
Projector temperature control method, device and equipment and projector Download PDFInfo
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- CN112162455A CN112162455A CN202011089858.1A CN202011089858A CN112162455A CN 112162455 A CN112162455 A CN 112162455A CN 202011089858 A CN202011089858 A CN 202011089858A CN 112162455 A CN112162455 A CN 112162455A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
Abstract
The method obtains the internal temperature of the projector acquired by a temperature monitoring device, wherein the temperature comprises the temperatures of two different positions in the direction of the air flow in the projector; calculating the difference value of the internal temperature of the projector according to the internal temperature of the projector; and when the difference value of the internal temperature of the projector exceeds the preset threshold range, adjusting the parameters of the temperature adjusting device, and controlling the temperature of the projector. The difference of the temperatures of two different positions in the direction of the air flow inside the projector represents the heat dissipation condition of the projector, and the temperature of the projector is controlled according to the heat dissipation condition of the projector, so that the heat dissipation effect can be improved.
Description
Technical Field
The application relates to the technical field of projection, in particular to a projector temperature control method, device, equipment and a projector.
Background
As is well known, a projector generates a certain amount of heat during operation, and the projector is usually required to be subjected to a heat dissipation treatment to prolong the service life of the projector.
In a conventional temperature control method for a projector, a plurality of fans are arranged in the projector, and fixed direct-current voltages are respectively set to drive the fans according to the different positions of the fans, so as to achieve a heat dissipation effect. However, as the dust of the dust screen is gradually accumulated in the airflow channel, the convective air in the airflow channel is less and less, and the expected heat dissipation effect cannot be achieved. Therefore, the conventional temperature control method for the projector has the defect of poor heat dissipation effect.
Disclosure of Invention
In view of the above, it is necessary to provide a projector temperature control method, apparatus, device and projector with good heat dissipation effect.
In a first aspect, a method for controlling temperature of a projector is provided, including:
acquiring the internal temperature of the projector acquired by a temperature monitoring device, wherein the internal temperature of the projector comprises the temperatures of two different positions in the direction of the internal airflow of the projector;
calculating the difference value of the internal temperature of the projector according to the internal temperature of the projector;
and when the difference value of the internal temperature of the projector exceeds the range of a preset threshold value, adjusting the parameters of the temperature adjusting device, and controlling the temperature of the projector.
In one embodiment, after calculating the difference between the projector internal temperatures according to the projector internal temperatures, the method further includes:
and when the difference value of the internal temperature of the projector is within the preset threshold range, returning to the step of acquiring the internal temperature of the projector acquired by the temperature monitoring device.
In one embodiment, the internal temperature of the projector includes a temperature of an air inlet of the projector, and after acquiring the internal temperature of the projector acquired by the temperature monitoring device, the method further includes:
and when the temperature of the air inlet of the projector exceeds a preset temperature threshold value, switching the projector to a standby protection mode.
In one embodiment, the temperature adjustment device includes a fan, and when the difference value of the internal temperature of the projector exceeds a preset threshold range, adjusting a parameter of the temperature adjustment device to perform projector temperature control includes:
when the difference value of the internal temperature of the projector is lower than the lower limit of the preset threshold range, reducing the rotating speed of the fan, and returning to the step of acquiring the internal temperature of the projector acquired by the temperature monitoring device;
and when the difference value of the internal temperature of the projector exceeds the upper limit of the preset threshold range, increasing the rotating speed of the fan, and returning to the step of acquiring the internal temperature of the projector acquired by the temperature monitoring device.
In one embodiment, the increasing the rotation speed of the fan when the difference value of the internal temperatures of the projectors exceeds the upper limit of the preset threshold range includes:
when the difference value of the internal temperature of the projector exceeds the upper limit of a preset threshold range, judging whether the rotating speed of the fan reaches a preset rotating speed threshold value;
if so, reducing the luminous power of the projector, and returning to the step of obtaining the internal temperature of the projector acquired by the temperature monitoring device;
if not, the rotating speed of the fan is increased.
In one embodiment, when the fan speed reaches a preset speed threshold, before the reducing the light emitting power of the projector power supply, the method further includes:
detecting whether the luminous power of the projector is smaller than a preset power threshold value;
if yes, sending prompt information;
and if not, reducing the luminous power of the projector, and returning to the step of acquiring the internal temperature of the projector acquired by the temperature monitoring device.
In a second aspect, there is provided a projector temperature control apparatus comprising:
the temperature acquisition module is used for acquiring the internal temperature of the projector acquired by the temperature monitoring device, wherein the internal temperature of the projector comprises the temperatures of two different positions in the airflow direction in the projector;
the difference value calculating module is used for calculating the difference value of the internal temperature of the projector according to the internal temperature of the projector;
and the temperature control module is used for adjusting the parameters of the temperature adjusting device to control the temperature of the projector when the difference value of the internal temperature of the projector exceeds the range of a preset threshold value.
In a third aspect, a projector temperature control device is provided, which comprises a temperature monitoring device, a temperature adjusting device and a controller, wherein the controller is connected with the temperature monitoring device, the temperature adjusting device and a projector light source;
the temperature monitoring device is used for acquiring the internal temperature of the projector and sending the internal temperature of the projector to the controller; the internal temperature of the projector comprises the temperature of two different positions in the direction of the air flow in the projector; the controller is used for controlling the temperature of the projector according to the method.
In one embodiment, the temperature monitoring device includes a first temperature sensor, a heat generating body, and a second temperature sensor; the dust screen, the temperature adjusting device, the first temperature sensor, the heating body and the second temperature sensor of the projector are sequentially arranged along the airflow direction;
the first temperature sensor is used for acquiring the temperature of the air inlet of the projector; the second temperature sensor is used for collecting the temperature of the heating body; the heating body works at fixed heating power.
In a fourth aspect, there is provided a projector including the projector temperature control apparatus described above.
According to the projector temperature control method, the internal temperature of the projector acquired by the temperature monitoring device is acquired, wherein the temperature comprises the temperature of two different positions in the direction of the airflow in the projector; calculating the difference value of the internal temperature of the projector according to the internal temperature of the projector; and when the difference value of the internal temperature of the projector exceeds the preset threshold range, adjusting the parameters of the temperature adjusting device, and controlling the temperature of the projector. The difference of the temperatures of two different positions in the direction of the air flow inside the projector represents the heat dissipation condition of the projector, and the temperature of the projector is controlled according to the heat dissipation condition of the projector, so that the heat dissipation effect can be improved.
Drawings
FIG. 1 is a schematic flow chart of a method for controlling temperature of a projector according to an embodiment;
FIG. 2 is a schematic flow chart illustrating a method for controlling the temperature of a projector according to another embodiment;
FIG. 3 is a schematic flow chart showing a temperature control method of a projector according to still another embodiment;
FIG. 4 is a schematic diagram illustrating a process of increasing the rotation speed of the fan when the difference between the internal temperatures of the projectors exceeds the upper limit of the preset threshold range in one embodiment;
FIG. 5 is a schematic diagram illustrating a process of increasing the rotation speed of the fan when the difference between the internal temperatures of the projectors exceeds the upper limit of the preset threshold range in another embodiment;
FIG. 6 is a block diagram showing the structure of a temperature control apparatus for a projector according to an embodiment;
FIG. 7 is a schematic diagram showing relative positions of a dust-proof screen, a temperature adjusting device, a first temperature sensor, a heating element, and a second temperature sensor in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first temperature sensor may be referred to as a second temperature sensor, and similarly, a second temperature sensor may be referred to as a first temperature sensor, without departing from the scope of the present application. The first temperature sensor and the second temperature sensor are both temperature sensors, but they are not the same temperature sensor.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
The projector temperature control method provided by the embodiment of the application is applied to a projector. Specifically, after the projector is started, the fan rotates according to a preset starting rotating speed, meanwhile, the temperature monitoring device collects the internal temperature of the projector and sends the collected internal temperature of the projector to the controller, and the controller controls the temperature of the projector according to the internal temperature of the projector. After the projector is shut down, the temperature monitoring device stops collecting work, and the fan stops rotating or stops rotating after continuously maintaining the rotating speed during shutdown for a period of time.
In one embodiment, referring to fig. 1, a method for controlling a temperature of a projector is provided, the method includes steps S200 to S600.
Step S200: and acquiring the internal temperature of the projector acquired by the temperature monitoring device.
As is well known, projectors have multiple sources of heat during operation, including light sources, display screens, power supplies, and host processors. These heat sources bring a great burden to the heat dissipation of the projector, and if the heat cannot be dissipated in time, the projection effect and the service life of the projector will be affected. According to different principles, heat dissipation methods can be divided into conduction heat dissipation and convection heat dissipation, and the heat dissipation method of the projector related to the application is the convection heat dissipation. After an airflow loop is formed inside the projector, heat can be dissipated to the external environment in a convection mode. The low-temperature airflow of the external environment enters the projector, and after passing through the heat source, the low-temperature airflow exchanges heat with the heat source, and after taking away part of heat, the low-temperature airflow is discharged to the external environment. The path taken by the air flow is the direction of the air flow inside the projector. It will be appreciated that in a projector, the air inlets are not unique and, correspondingly, the air flow circuits are not unique. Temperature acquisition needs to be performed separately for each airflow loop. Two different positions in the direction of the air flow inside the projector for temperature acquisition need to be separated by a certain distance to ensure that the temperature between the two different positions cannot form crosstalk. For example, the temperatures near and far from the air inlet may be collected in the internal airflow direction, respectively.
Specifically, after the temperature monitoring device collects the temperatures of two different positions in the direction of the air flow in the projector, the controller can directly read the temperature result in the projector collected by the temperature monitoring device, and can also analyze the parameter change condition to obtain the internal temperature of the projector by acquiring the parameter change condition of the temperature monitoring device.
Step S400: and calculating the difference value of the internal temperature of the projector according to the internal temperature of the projector.
Specifically, the difference between the projector internal temperatures is obtained by subtracting the reduced temperature from the higher temperature among the projector internal temperatures obtained in step S100, and thus the difference between the projector internal temperatures is a non-negative number. Further, after the controller calculates the difference value of the internal temperature of the projector, whether the difference value exceeds a preset threshold range is judged. Specifically, the preset threshold range can be set according to the difference between the temperature acquisition position inside the projector and the heat source parameter inside the projector. Within the preset threshold range, the operation condition of the projector temperature adjusting device is matched with the heating condition of the projector during normal operation.
Step S600: and when the difference value of the internal temperature of the projector exceeds the preset threshold range, adjusting the parameters of the temperature adjusting device, and controlling the temperature of the projector.
The difference value of the internal temperature of the projector exceeds a preset threshold range, including exceeding the upper limit of the preset threshold range or being lower than the lower limit of the preset threshold range. As described above, the preset threshold range may be set according to the difference between the projector internal temperature collection position and the projector internal heat source parameter. When the difference value of the internal temperature of the projector exceeds the preset threshold range, the parameters of the temperature adjusting device need to be adjusted to control the temperature of the projector.
According to the projector temperature control method, the internal temperature of the projector acquired by the temperature monitoring device is acquired, wherein the temperature comprises the temperature of two different positions in the direction of the airflow in the projector; calculating the difference value of the internal temperature of the projector according to the internal temperature of the projector; and when the difference value of the internal temperature of the projector exceeds the preset threshold range, adjusting the parameters of the temperature adjusting device, and controlling the temperature of the projector. The difference of the temperature of two different positions in the inside air current direction of projecting apparatus promptly comes the heat dissipation condition of representation projecting apparatus to carry out the temperature control of projecting apparatus according to the heat dissipation condition of projecting apparatus, can promote the radiating effect, increase the life of projecting apparatus.
In one embodiment, the projector internal temperature obtained in step S200 includes a temperature of a projector air inlet, and after step S200, the method further includes the steps of: and when the temperature of the air inlet of the projector exceeds a preset temperature threshold value, switching the projector to a standby protection mode.
The projector air inlet refers to a passage for air flow of the external environment to enter the projector. The temperature of the projector air inlet may be equal to the temperature of the external environment. Correspondingly, the preset temperature threshold refers to the highest ambient temperature at which the projector normally works. When the external environment temperature exceeds the preset temperature threshold, the projector cannot radiate heat, and the damage is easily caused by overheating of devices. Therefore, when the temperature of the air inlet of the projector exceeds the preset temperature threshold, the projector is switched to the standby protection mode, so that the projector runs at low power, overheating is avoided, and the service life of the projector is prolonged.
In an embodiment, referring to fig. 2, after step S400, the method further includes: when the difference value of the internal temperature of the projector is within the preset threshold range, the process returns to step S200.
Specifically, when the difference value of the internal temperature of the projector is within the preset threshold range, it indicates that the operation condition of the projector temperature adjusting device matches with the working condition of the projector, and the projector temperature control is not needed. At this time, the process returns to step S200, and the subsequent steps are performed according to the obtained difference value of the internal temperature of the projector.
In the above embodiment, when the difference value of the internal temperature of the projector is within the preset threshold range, the step of obtaining the internal temperature of the projector acquired by the temperature monitoring device is returned, so that the cyclic adjustment of the temperature control of the projector is formed, and the improvement of the scientificity of the temperature control method of the projector is facilitated.
In one embodiment, the temperature adjusting device includes a fan, and referring to fig. 3, step S600 includes step S610 and step S620.
Step S610: and when the difference value of the internal temperature of the projector is lower than the lower limit of the preset threshold range, reducing the rotating speed of the fan.
The temperature adjustment device may include one or more fans. When the temperature adjusting device comprises a plurality of fans, each fan corresponds to one air inlet to form an air flow loop. And respectively carrying out projector internal temperature acquisition aiming at each airflow loop, and respectively carrying out projector temperature control according to the acquired temperature difference values at different positions. When the difference value of the internal temperature of the projector is lower than the lower limit of the preset threshold range, the cooling effect of the air flow in the projector is beyond expectation, and at the moment, the heat dissipation requirement can be met by properly reducing the air flow. The size of the airflow entering the projector is determined by the air volume of the fan, and is mainly related to parameters such as the shape and size of the fan blades, the rotating speed of the fan and the like. Because the shape and the size of the fan blades are fixed after the fan leaves the factory, the air flow can be adjusted by adjusting the rotating speed of the fan. Specifically, the fan speed may be reduced by reducing the fan driving voltage, or may be reduced by switching the capacitor. The reduction range of the rotating speed of the fan can be gradually reduced according to a preset rotating speed span; the rotating speed can be adjusted according to the difference degree between the difference value of the internal temperature of the projector and the lower limit of the preset threshold range, when the difference degree is large, the reduction range of the rotating speed of the fan is increased, and when the difference degree is small, the reduction range of the rotating speed of the fan is reduced. In summary, the embodiment does not limit the specific manner of reducing the fan speed and the reduction range of the fan speed. And after the rotating speed of the fan is reduced, returning to the step S200, and acquiring the internal temperature of the projector acquired by the temperature monitoring device again.
Step S620: and when the difference value of the internal temperature of the projector exceeds the upper limit of the preset threshold range, the rotating speed of the fan is increased.
When the difference of the inside temperature of projecting apparatus surpassed and predetermine threshold value scope upper limit, it can't satisfy the heat dissipation demand of projecting apparatus to show the inside air current cooling effect of projecting apparatus, at this moment, needs increase air flow in order to promote the radiating effect. As described above, since the shape and size of the fan blades are fixed after shipment, the amount of airflow can be adjusted by adjusting the rotation speed of the fan. Specifically, the fan speed may be increased by increasing the fan driving voltage, or may be increased by switching the capacitor. The increasing range of the rotating speed of the fan can be gradually reduced according to the preset rotating speed span; the rotating speed can be adjusted according to the difference degree between the difference value of the internal temperature of the projector and the upper limit of the preset threshold range, when the difference degree is large, the adjusting range of the rotating speed of the fan is increased, and when the difference degree is small, the adjusting range of the rotating speed of the fan is reduced. In summary, the embodiment does not limit the specific manner of increasing the fan speed and the reduction range of the fan speed. Furthermore, after the rotating speed of the fan is increased, the internal temperature of the projector acquired by the temperature monitoring device is acquired again.
In the above embodiment, according to the difference of the inside temperature of the projector and the size relation of the upper limit or the lower limit of the preset threshold range, the control of the rotating speed of the fan is performed, the temperature of the projector can be controlled according to actual conditions, the energy utilization rate is improved, and the heat dissipation effect is improved.
In one embodiment, referring to fig. 4, step S620 includes step S621, step S624, and step S625.
Step S621: and when the difference value of the internal temperature of the projector exceeds the upper limit of the preset threshold range, judging whether the rotating speed of the fan reaches a preset rotating speed threshold value.
As described above, when the difference value of the internal temperature of the projector exceeds the upper limit of the preset threshold range, it is described that the cooling effect of the air flow inside the projector cannot meet the heat dissipation requirement of the projector, and at this moment, the heat dissipation effect of the projector needs to be improved through parameter adjustment. The preset rotating speed threshold value refers to the rated maximum rotating speed value of the fan. When the rotation speed of the fan exceeds the preset rotation speed threshold, damage to the inside of the fan may be caused, and the service life of the fan may be reduced. Therefore, the fan rotation speed needs to be determined before the fan rotation speed is increased. Specifically, a magnetic element can be installed at a rotating part of the fan based on a hall effect, the magnetic element forms a hall inductive switch in the rotating process of the fan, and the rotating speed of the fan is measured by acquiring a pulse signal of the hall inductive switch; the actual rotational speed of the fan can also be measured based on the photoelectric effect. In short, the embodiment does not limit the manner of obtaining the fan speed.
Further, if the fan speed reaches the preset speed threshold, go to step S624; otherwise, step S625 is executed.
Step S624: the luminous power of the projector is reduced.
When the rotating speed of the fan reaches the preset rotating speed threshold value, the airflow cannot be increased by increasing the rotating speed of the fan so as to improve the heat dissipation effect. At this moment, can reduce the luminous power of projecting apparatus, reduce the inside temperature difference of projecting apparatus through reducing to generate heat, promote the radiating effect. Further, after the light emitting power of the projector is reduced, the step S200 is returned to, and the internal temperature of the projector acquired by the temperature monitoring device is acquired again.
Step S625: the fan speed is increased.
When the rotating speed of the fan does not reach the preset rotating speed threshold value, the rotating speed of the fan is increased to increase airflow so as to improve the heat dissipation effect. As described above, the fan speed may be increased by increasing the fan driving voltage, or may be increased by switching the capacitance. The increasing range of the rotating speed of the fan can be gradually reduced according to the preset rotating speed span; the rotating speed can be adjusted according to the difference degree between the difference value of the internal temperature of the projector and the upper limit of the preset threshold range, when the difference degree is large, the adjusting range of the rotating speed of the fan is increased, and when the difference degree is small, the adjusting range of the rotating speed of the fan is reduced. In summary, the embodiment does not limit the specific manner of increasing the fan speed and the reduction range of the fan speed. Further, after the rotating speed of the fan is increased, the step of acquiring the internal temperature of the projector acquired by the temperature monitoring device is carried out again.
In the above embodiment, when the difference value of the internal temperature of the projector exceeds the upper limit of the preset threshold range, it is determined whether the rotation speed of the fan reaches the preset rotation speed threshold, and then the temperature of the projector is controlled according to the magnitude relation between the current rotation speed of the fan and the preset rotation speed threshold, so that the service life of the projector fan can be prolonged.
In one embodiment, referring to fig. 5, before step S624, step S620 further includes step S622 when the fan speed reaches the preset speed threshold.
Step S622: and detecting whether the luminous power of the projector is smaller than a preset power threshold value.
The luminous power of the projector determines the brightness of the projector. Brightness is the intensity of light output by the projector onto the screen and also the brightness of the projected image. Generally, the higher the brightness of the projector, the brighter the image of the same size projected onto the screen, and the sharper the image. However, the brightness of the image that can be perceived by the human eye is not only dependent on the brightness of the projector, but also has a large relationship with the ambient light intensity and the size of the image. The stronger the ambient light, the less bright the image perceived by the human eye is. Therefore, before leaving the factory, the corresponding relationship between the ambient light intensity and the minimum value of the projector brightness can be established, that is, the preset power threshold of the projector luminous power corresponding to the ambient light intensity is set. Under a certain environment, the use requirement can be met only by reaching a preset power threshold. Specifically, the ambient light sensor may be used to sense the ambient light intensity, and then the light emitting power threshold of the projector may be determined according to the sensed ambient light intensity and the corresponding relationship between the ambient light intensity and the light emitting power threshold of the projector.
Further, if the light emitting power of the projector is smaller than the preset power threshold, step S623 is executed; otherwise, step S624 is executed.
Step S623: and sending prompt information.
When the luminous power of the projector is smaller than the preset power threshold, the projector cannot improve the heat dissipation effect by adjusting the parameters, and prompt information needs to be sent to remind the projector to maintain. Specifically, the prompt message can be sent to the signal lamp and/or the buzzer, and the signal lamp and/or the buzzer generates an alarm signal to give an alarm. The alarm signal can be sound, light or a combination of sound and light. The prompt message may be a fault code or a text message. The prompt information can be output to a projection screen for display, and also can be sent to a terminal, wherein the terminal can be a mobile terminal such as a mobile phone and a tablet, and can also be an upper computer. The present embodiment does not limit the sending method of the prompt message and the specific content of the prompt message.
Step S624: the luminous power of the projector is reduced.
When the luminous power of the projector is not less than the preset power threshold, the luminous power of the projector can be properly reduced, the internal temperature difference of the projector is reduced by reducing heating, and the heat dissipation effect is improved. Specifically, the power can be reduced step by step according to a preset power span; the power can also be adjusted according to the difference degree between the current luminous power of the projector and the preset power threshold, when the difference degree is large, the adjustment range of the luminous power is increased, and when the difference degree is small, the adjustment range of the luminous power is reduced. In summary, the present embodiment does not limit the reduction range of the light emission power of the projector. And after the luminous power of the projector is reduced, the step of acquiring the internal temperature of the projector acquired by the temperature monitoring device is carried out again.
In the above embodiment, the light emitting power threshold of the projector is preset according to the ambient temperature, and the internal temperature of the projector is controlled on the premise of ensuring the projection effect, so that the scientificity of the projector temperature control method can be improved. When the luminous power of projecting apparatus is less than predetermineeing the power threshold value, send tip information, the user can in time carry out the maintenance of projecting apparatus according to tip information, for example change dust screen etc. can increase the life of projecting apparatus.
Further, in an embodiment, after the temperature of the projector is controlled, after a period of time, the process returns to step S200 to obtain the internal temperature of the projector again, which is acquired by the temperature monitoring device. Specifically, the internal temperature of the projector acquired by the temperature monitoring device can be acquired again after a fixed interval, and the interval corresponding to the adjustment range of the rotating speed of the fan can be obtained according to the temperature control experimental data before leaving the factory. In a temperature control experiment before leaving a factory, after the rotating speed of the fan is adjusted, the difference value of the internal temperature of the projector returns to the range of the preset threshold value after the corresponding interval time. In summary, the present embodiment does not limit the interval time for reacquiring the internal temperature of the projector acquired by the temperature monitoring device.
In the above embodiment, the controller does not need to acquire the internal temperature of the projector in real time, but after the temperature of the projector is controlled, the internal temperature of the projector acquired by the temperature monitoring device is acquired again after a period of time, so that the operation cost of the controller is greatly saved, and the processing speed is increased.
It should be understood that although the various steps in the flow charts of fig. 1-5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order 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 some of the steps in fig. 1-5 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, referring to fig. 6, an apparatus for controlling temperature of a projector is provided, which includes a temperature obtaining module 200, a difference calculating module 400 and a temperature control module 600. The temperature acquisition module 200 is configured to acquire the internal temperature of the projector acquired by the temperature monitoring device, where the internal temperature of the projector includes temperatures at two different positions in the direction of the internal airflow of the projector; a difference value calculating module 400, configured to calculate a difference value of the projector internal temperature according to the projector internal temperature; and the temperature control module 600 is configured to adjust parameters of the temperature adjustment device to control the temperature of the projector when the difference value of the internal temperature of the projector exceeds a preset threshold range.
In one embodiment, the temperature control module 600 is further configured to: and when the difference value of the internal temperature of the projector is within the preset threshold range, returning to the step of acquiring the internal temperature of the projector acquired by the temperature monitoring device.
In one embodiment, the projector internal temperature includes a temperature of the projector air inlet, and the temperature control module 600 is further configured to: and when the temperature of the air inlet of the projector exceeds a preset temperature threshold value, switching the projector to a standby protection mode.
In one embodiment, the temperature control module 600 is specifically configured to: when the difference value of the internal temperature of the projector is lower than the lower limit of the preset threshold range, reducing the rotating speed of the fan, and returning to the step of acquiring the internal temperature of the projector acquired by the temperature monitoring device; and when the difference value of the internal temperature of the projector exceeds the upper limit of the preset threshold range, increasing the rotating speed of the fan, and returning to the step of acquiring the internal temperature of the projector acquired by the temperature monitoring device.
In one embodiment, the temperature control module 600 is further configured to: when the difference value of the internal temperature of the projector exceeds the upper limit of the preset threshold range, judging whether the rotating speed of the fan reaches a preset rotating speed threshold value or not; if so, reducing the luminous power of the projector, and returning to the step of obtaining the internal temperature of the projector acquired by the temperature monitoring device; if not, increasing the rotating speed of the fan, and returning to the step of acquiring the internal temperature of the projector acquired by the temperature monitoring device.
In one embodiment, the temperature control module 600 is further configured to: when the rotating speed of the fan reaches a preset rotating speed threshold value, detecting whether the luminous power of the projector is smaller than a preset power threshold value; if yes, sending prompt information; if not, reducing the luminous power of the projector, and returning to the step of obtaining the internal temperature of the projector acquired by the temperature monitoring device.
For specific definition of the projector temperature control device, reference may be made to the above definition of the projector temperature control method, which is not described herein again. The modules in the projector temperature control device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from 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 projector temperature control apparatus is provided that includes a temperature monitoring device, a temperature adjustment device, and a controller. The controller is connected with the temperature monitoring device, the temperature adjusting device and the projector light source; the temperature monitoring device is used for acquiring the internal temperature of the projector and sending the internal temperature of the projector to the controller; the temperature inside the projector acquired by the temperature monitoring device comprises the temperatures of two different positions in the airflow direction inside the projector; the controller is used for realizing the control method in any one of the above embodiments.
As described above, according to the number of the projector air inlets, a corresponding number of temperature detection devices and temperature adjustment devices may be provided to perform temperature acquisition and temperature control, respectively. Specifically, after the temperature monitoring device collects the temperatures of two different positions in the air flow direction in the projector, the collected temperatures are sent to the controller, the controller calculates the difference value of the temperatures in the projector, and when the difference value exceeds a preset threshold range, a temperature control instruction is sent to the corresponding temperature adjusting device; and the temperature adjusting device controls the temperature of the projector according to the temperature control instruction.
According to the projector temperature control equipment, the temperature monitoring device acquires the temperatures of two different positions in the air flow direction in the projector, the controller calculates the difference of the temperatures of the different positions, when the difference exceeds the range of the preset threshold value, the controller sends the temperature control instruction to the temperature adjusting device, and finally the temperature adjusting device controls the temperature of the projector according to the temperature control instruction, so that the temperature of the projector can be controlled according to actual conditions, and the heat dissipation effect is improved.
In one embodiment, referring to fig. 7, the temperature monitoring device includes a first temperature sensor, a heating element, and a second temperature sensor; the dust prevention 1, the temperature adjusting device 2, the first temperature sensor 3, the heating body 4 and the second temperature sensor 5 of the projector are sequentially arranged along the airflow direction; the first temperature sensor 3 is used for acquiring the temperature of the air inlet of the projector; the second temperature sensor 5 is used for collecting the temperature of the heating body 4; the heating element 4 operates at a fixed heating power.
A certain distance is required to be arranged between the first temperature sensor 3 and the second temperature sensor 5 to avoid crosstalk and influence on a temperature acquisition result. The first temperature sensor 3, the heating body 4 and the second temperature sensor 5 can be fixed on the circuit board as discrete components, or can be packaged into a device and then fixed. Specifically, the low-temperature gas in the external environment reaches the first temperature sensor 3 after passing through the dust screen 1 and the temperature adjusting device 2, and the temperature of the gas flow collected by the first temperature sensor 3 is equivalent to the temperature of the external environment. The heating element 4 works at a fixed heating power, and when the air flow or the external environment temperature changes, the heat dissipation effect of the air flow on the heating element 4 changes, and the change of the temperature of the heating element 4 collected by the second temperature sensor 5 is directly influenced. The change condition of the difference between the heating element temperature 4 and the environment temperature can reflect the change condition of the heat dissipation effect of the projector. The first temperature sensor 3 and the second temperature sensor 5 are connected with the controller, the collected temperature is sent to the controller, the controller sends a temperature control instruction to the temperature adjusting device according to the difference change condition of the temperature of the heating body and the ambient temperature, and finally the temperature adjusting device 2 controls the temperature of the projector according to the temperature control instruction.
In the above embodiment, the first sensor is used to collect the ambient temperature, the second sensor is used to collect the temperature of the heating element operating at the fixed heating power, and the collected temperature is sent to the controller. And the controller calculates the difference between the two temperatures, sends a temperature control instruction to the temperature adjusting device according to the change condition of the difference between the two temperatures, and finally performs temperature control on the projector by the temperature adjusting device according to the temperature control instruction. Can carry out projecting apparatus temperature control according to actual conditions, promote the radiating effect.
In one embodiment, there is provided a projector including the projector temperature control device of any of the above embodiments.
The projector may be a reflective projector or a portable projector, and in short, the present embodiment does not limit the type of the projector. For specific limitations on the structure and operation of the temperature control device of the projector, reference is made to the above description, which is not repeated herein.
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 examples 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 invention. 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 patent shall be subject to the appended claims.
Claims (10)
1. A method for controlling temperature of a projector, comprising:
acquiring the internal temperature of the projector acquired by a temperature monitoring device, wherein the internal temperature of the projector comprises the temperatures of two different positions in the direction of the internal airflow of the projector;
calculating the difference value of the internal temperature of the projector according to the internal temperature of the projector;
and when the difference value of the internal temperature of the projector exceeds the range of a preset threshold value, adjusting the parameters of the temperature adjusting device, and controlling the temperature of the projector.
2. The projector temperature control method according to claim 1, wherein after calculating the difference in the projector internal temperature from the projector internal temperature, the method further comprises:
and when the difference value of the internal temperature of the projector is within the preset threshold range, returning to the step of acquiring the internal temperature of the projector acquired by the temperature monitoring device.
3. The method according to claim 1, wherein the projector internal temperature includes a temperature of a projector air inlet, and after acquiring the projector internal temperature acquired by the temperature monitoring device, the method further includes:
and when the temperature of the air inlet of the projector exceeds a preset temperature threshold value, switching the projector to a standby protection mode.
4. The method as claimed in claim 1, wherein the temperature adjustment device comprises a fan, and when the difference value of the internal temperature of the projector exceeds a preset threshold range, adjusting the parameter of the temperature adjustment device to perform projector temperature control comprises:
when the difference value of the internal temperature of the projector is lower than the lower limit of the preset threshold range, reducing the rotating speed of the fan, and returning to the step of acquiring the internal temperature of the projector acquired by the temperature monitoring device;
and when the difference value of the internal temperature of the projector exceeds the upper limit of the preset threshold range, increasing the rotating speed of the fan, and returning to the step of acquiring the internal temperature of the projector acquired by the temperature monitoring device.
5. The projector temperature control method according to claim 4, wherein the increasing the fan speed when the difference value of the projector internal temperature exceeds the upper limit of the preset threshold range comprises:
when the difference value of the internal temperature of the projector exceeds the upper limit of a preset threshold range, judging whether the rotating speed of the fan reaches a preset rotating speed threshold value;
if so, reducing the luminous power of the projector, and returning to the step of obtaining the internal temperature of the projector acquired by the temperature monitoring device;
if not, the rotating speed of the fan is increased.
6. The method of claim 5, wherein when the fan speed reaches a preset speed threshold, before the reducing the light emitting power of the projector power supply, further comprising:
detecting whether the luminous power of the projector is smaller than a preset power threshold value;
if yes, sending prompt information;
and if not, reducing the luminous power of the projector, and returning to the step of acquiring the internal temperature of the projector acquired by the temperature monitoring device.
7. A temperature control apparatus for a projector, comprising:
the temperature acquisition module is used for acquiring the internal temperature of the projector acquired by the temperature monitoring device, wherein the internal temperature of the projector comprises the temperatures of two different positions in the airflow direction in the projector;
the difference value calculating module is used for calculating the difference value of the internal temperature of the projector according to the internal temperature of the projector;
and the temperature control module is used for adjusting the parameters of the temperature adjusting device to control the temperature of the projector when the difference value of the internal temperature of the projector exceeds the range of a preset threshold value.
8. The projector temperature control equipment is characterized by comprising a temperature monitoring device, a temperature adjusting device and a controller, wherein the controller is connected with the temperature monitoring device, the temperature adjusting device and a projector light source;
the temperature monitoring device is used for acquiring the internal temperature of the projector and sending the internal temperature of the projector to the controller; the internal temperature of the projector comprises the temperature of two different positions in the direction of the air flow in the projector; the controller is used for projector temperature control according to the method of any one of claims 1-6.
9. The projector temperature control apparatus according to claim 8, wherein the temperature monitoring apparatus includes a first temperature sensor, a heat generating body, and a second temperature sensor; the dust screen, the temperature adjusting device, the first temperature sensor, the heating body and the second temperature sensor of the projector are sequentially arranged along the airflow direction;
the first temperature sensor is used for acquiring the temperature of the air inlet of the projector; the second temperature sensor is used for collecting the temperature of the heating body; the heating body works at fixed heating power.
10. A projector characterized by comprising the projector temperature control apparatus according to any one of claims 8 to 9.
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| CN202011089858.1A CN112162455A (en) | 2020-10-13 | 2020-10-13 | Projector temperature control method, device and equipment and projector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011089858.1A CN112162455A (en) | 2020-10-13 | 2020-10-13 | Projector temperature control method, device and equipment and projector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114501720A (en) * | 2021-12-03 | 2022-05-13 | 青岛海泰新光科技股份有限公司 | Control method and device for stable output of cold light source |
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| US20120075599A1 (en) * | 2009-06-09 | 2012-03-29 | Park Yong S | Method for controlling a projector |
| CN107315308A (en) * | 2016-04-27 | 2017-11-03 | 深圳市光峰光电技术有限公司 | Projecting apparatus and its cooling control method |
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| CN101673033A (en) * | 2008-09-11 | 2010-03-17 | 中强光电股份有限公司 | Device and method for controlling heat dissipation of projector |
| US20120075599A1 (en) * | 2009-06-09 | 2012-03-29 | Park Yong S | Method for controlling a projector |
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| CN114501720A (en) * | 2021-12-03 | 2022-05-13 | 青岛海泰新光科技股份有限公司 | Control method and device for stable output of cold light source |
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