CN205879977U - Wind speed detection device of projector and projector - Google Patents

Abstract

The utility model relates to a projector wind speed detection device. The projector wind speed detection device includes an airflow channel and a dust-proof net arranged at the air inlet of the airflow channel, and also includes a detection device arranged in the airflow channel and a fan for the projector to dissipate heat; the detection device is used to detect According to the wind speed, a corresponding prompt message will be issued to provide users with information about the blockage of the dust filter and remind the user to clean the dust filter in time. At the same time, the detection device is connected with the fan to control the working voltage of the fan, adjust the wind speed of the fan to dissipate heat for the projector, and prevent the projector from being damaged due to the blockage of the dust filter or the high temperature of the projector caused by the change of air pressure. In addition, a projector including the above-mentioned projector wind speed detection device is also provided.

Description

Projector wind speed detection device and projector

technical field

The utility model relates to the technical field of projectors, in particular to a projector wind speed detection device and a projector.

Background technique

The projector is an electronic product with strong heat generation. When the projector is working, it needs multiple fans to cool it. The service life of the projector will be different in different environments, mainly due to external environmental factors, such as the ambient temperature during work. , the ambient air pressure, and the amount of dust. When the projector works in an environment with high altitude, the wind force generated by the same fan voltage will become smaller. At this time, the temperature of the optical components inside the projector will increase due to the smaller wind force, so its service life will be shortened. reduce. Similarly, when the projector works in a dusty environment, the dust filter of the projector will be blocked, and the dust filter of the projector needs to be cleaned in time, otherwise the air volume of the fan inside the projector will also be reduced.

In many projectors, when the dust filter is blocked, the internal components of the projector are damaged because the user does not clean it in time. Or if the high altitude mode is not turned on when the projector is used in a high altitude environment, it will also cause damage to the internal components of the projector.

Utility model content

Based on this, it is necessary to address the above problems and provide a projector wind speed detection device that can detect the blockage of the dust filter of the projector in real time and has high safety performance.

A projector wind speed detection device, comprising an airflow channel and a dust-proof net arranged at the air inlet of the airflow channel, and also includes a detection device arranged in the airflow channel and a fan for cooling the projector;

The detection device is used to detect the wind speed in the airflow channel, and send corresponding prompt information according to the wind speed;

The detection device is connected with the fan and is used to control the working voltage of the fan.

In one of the embodiments, the detection device includes a main control unit, a heater and a temperature sensor;

The main control unit is connected to the heater to provide a constant current source for the heater;

The temperature sensor is connected to the main control unit, and is used to detect the temperature in the airflow channel, and transmit the detected actual temperature to the main control unit for processing;

The main control unit controls and adjusts the working voltage of the fan according to the actual temperature value, wherein the wind speed is inversely proportional to the actual temperature value.

In one of the embodiments, the detection device includes a storage unit, the storage unit is connected with the main control unit, and is used to store a preset temperature value, and the preset temperature value is the projector, the dust-proof net When both are working normally, the stable temperature value measured by the temperature sensor.

In one of the embodiments, the detection device further includes a timing unit, the timing unit is respectively connected with the main control unit and the temperature sensor; and is used to record the time when the temperature sensor collects the temperature.

In one of the embodiments, the heater is a heating resistor.

In one of the embodiments, the detection device further includes an alarm unit connected to the main control unit.

In one of the embodiments, the alarm unit is at least one of a voice alarm, a buzzer or an indicator light.

In addition, a projector is also provided, including the above-mentioned wind speed detection device for the projector.

In one of the embodiments, the projector further includes a bottom case, the bottom case is provided with at least two card slots, the dust-proof net is provided with at least two buckles, and the dust-proof net passes through the The buckle cooperates with the slot and is fixed on the air inlet end of the airflow channel.

The above-mentioned projector wind speed detection device includes an airflow channel and a dust-proof net arranged at the air inlet of the airflow channel, and also includes a detection device arranged in the airflow channel and a fan for radiating heat for the projector; the detection device is used to detect airflow The wind speed in the channel, and send corresponding prompt information according to the wind speed to provide users with information about the blockage of the dust filter and remind the user to clean the dust filter in time. At the same time, the detection device is connected with the fan to control the working voltage of the fan, adjust the wind speed of the fan to dissipate heat for the projector, and prevent the projector from being damaged due to the blockage of the dust filter or the high temperature of the projector caused by the change of air pressure.

Description of drawings

Fig. 1 is the partial structure schematic diagram of projector wind speed detecting device;

FIG. 2 is a structural frame diagram of a projector wind speed detection device.

detailed description

In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. Preferred embodiments of the utility model are provided in the accompanying drawings. However, the invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present utility model more thorough and comprehensive.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terminology used in the description of the utility model herein is only for the purpose of describing specific embodiments, and is not intended to limit the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in Figure 1, it is a schematic diagram of the local structure of the projector wind speed detection device. The projector wind speed detection device includes an air flow channel 10 and a dustproof net 20 arranged at the air inlet of the air flow channel 10, and also includes a The detection device 30 and the fan 40 for cooling the projector. The detection device 30 can also be used to detect the wind speed in the airflow channel 10, and send corresponding prompt information according to the wind speed. The detection device 30 is connected with the fan 40 and can be used to control the working voltage of the fan 40. The better the working voltage of the fan 40 is, the higher the rotation speed of the fan 40 is, and the higher the wind speed is.

When there is dust accumulated on the dust-proof net 20, the gas sucked by the fan 40 inside the airflow passage 10 will decrease, and the wind speed will decrease, so that the airflow passage can be detected by the detection device 30 installed on the airflow passage 10 The wind speed within 10 is used to determine the amount of dust on the dust-proof net 20. When the dust on the dust-proof net 20 accumulates to a certain extent, the detection device 30 will send a corresponding prompt message to prompt the user to clean the dust-proof net 20.

FIG. 2 is a structural frame diagram of a wind speed detection device for a projector, wherein the detection device 30 includes a main control unit 310 , a heater 320 and a temperature sensor 330 . The main control unit 310 is connected to the heater 320 to provide a constant current source for the heater 320 . The temperature sensor 330 is connected with the heater 320 and the main control unit 310 respectively, and is used to detect the temperature in the airflow channel 10, and transmits the detected actual temperature to the main control unit 310 for processing, and the main control unit 310 controls and adjusts the fan according to the actual temperature value 40 working voltage, where the working voltage is inversely proportional to the actual temperature value.

When the projector starts to work, the main control unit 310 provides a stable power current source for the heater 320, and the stable current will generate a stable heat. In this embodiment, the heater 320 is a heating resistor. In other embodiments, it can also be a thin metal wire (called a heating wire) or other similar heaters 320 .

The detection device 30 includes a storage unit 340 connected to the main control unit 310 for storing preset temperature values.

In a normal working environment (the dust filter 20 is not blocked or is at a normal altitude), the fan 40 also works with a constant working voltage to generate a stable airflow in the airflow channel 10 . When the air flow passes through the heater 320, a certain amount of heat will be taken away, and the heat taken away by the air flow at different wind speeds in a unit time will also be different. After working for a period of time, the air flow and the heat emitted by the heater 320 reach a state of equilibrium, and the temperature sensor 330 will provide a stable temperature value, which is called a preset temperature value. The air velocity at this time can be deduced from the temperature value detected by the temperature sensor 330 .

When the dust-proof net 20 of the projector is blocked or the air pressure in the working environment of the projector changes, the airflow generated by the fan 40 inside the projector will become smaller, and the temperature of the temperature sensor 330 will be higher than the preset temperature value at this time. The amount of change can reflect that the wind speed of the airflow becomes larger, and the main control unit 310 correspondingly increases the working voltage of the fan 40 of the projector to increase the wind speed of the fan 40 to dissipate heat from the projector and prevent the projector from being blocked or blocked by the dust filter 20. Changes in air pressure make the projector overheated and damage the projector.

The detection device 30 also includes a timing unit 350, which is respectively connected to the main control unit 310 and the temperature sensor 330; and is used to record the time when the temperature sensor 330 collects the temperature. The temperature sensor 330 in the detection device 30 transmits the detected actual temperature value in the airflow channel 10 to the main control unit 310, and the main control unit 310 calls the preset temperature value stored in the storage unit 340, and compares it with the actual temperature value, If the actual temperature value is higher than the preset temperature value, the main control unit 310 controls to increase the working voltage of the fan 40 to increase the wind speed of the fan 40 to dissipate heat for the projector.

At the same time, the timing unit 350 starts counting, and detects the temperature in the airflow channel 10 every two minutes, until the temperature detected each time tends to a stable value, but the stable value is still higher than the preset temperature value, then the main control unit 310 will Send out a corresponding prompt message, prompting that the dust-proof net 20 used for the projector is blocked and needs to be cleaned; or remind the user that the projector is in a high-altitude working environment, and the projector needs to stop working until the temperature drops to a preset temperature within range. In this way, the projector can be prevented from being damaged due to the clogging of the projector dust filter 20 or the change of air pressure.

The detection device 30 also includes an alarm unit 360, which is connected to the main control unit 310. The main control unit 310 transmits the prompt signal to the alarm unit, and the alarm unit 360 performs alarm processing. In this embodiment, the alarm unit 360 is a voice alarm, and when receiving a prompt signal, the alarm unit 360 will send out a "dididi" or similar alarm tone. In other embodiments, the alarm unit 360 can also be a buzzer, an indicator light or other devices that can serve as an alarm. If the projector is working in a normal environment, the alarm signal will prompt the user that the dust-proof net 20 of the projector has been blocked and needs to be cleaned. If the projector works in a high-altitude environment, the user is prompted that the dust-proof net 20 of the projector is blocked and needs to be cleaned or the projector needs to stop working until the temperature drops within the preset temperature range. Through the prompt of the alarm unit 360, the user can timely deal with the projector accordingly, so as to avoid damage to the projector caused by the clogging of the dust filter 20 or the change of the air pressure.

Using the above-mentioned projector wind speed detection device, the detection device 30 in the projector can detect the temperature in the airflow channel 10 due to the blockage of the dust filter 20 or the change of the external ambient air pressure, and compare it with the preset temperature value, and adjust the fan in time 40 working voltage, restore the normal wind speed of the air duct, and avoid overheating and damage to the projector components. At the same time, the temperature in the airflow channel 10 can be continuously detected. If the temperature still cannot drop to the preset temperature range within a certain period of time, a prompt signal will be sent to remind the user to pay attention to cleaning the dust-proof net 20 . At the same time, it can also ensure the safe use of the projector in different working environments.

A projector includes the above-mentioned projector wind speed detection device. The projector also includes a bottom case, the bottom case is provided with at least two card slots, and the dust-proof net 20 is provided with at least two buckles, and the dust-proof net 20 is connected with the buckle through the buckles. The matching slots are fixed on the air inlet end of the airflow channel 10 . This design is convenient for removing the dust-proof net for cleaning, and it is also convenient for installation and use.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the utility model, and the description thereof is relatively specific and detailed, but it should not be interpreted as a limitation on the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (9)

1. a scialyscope wind speed detection device, it is characterised in that include gas channel and be arranged on described gas channel air intake Air Filter at Kou, it is characterised in that also include the detection device being arranged in described gas channel and dissipate for described scialyscope The fan of heat；

Described detection device is for detecting the wind speed in described gas channel, and sends according to described wind speed and point out letter accordingly Breath；

Described detection device is connected with described fan, for controlling the running voltage of fan.

Scialyscope wind speed detection device the most according to claim 1, it is characterised in that described detection device includes master control list Unit, heating element and temperature sensor；

Described main control unit is connected with described heating element, provides constant current source for described heating element；

Described temperature sensor is connected with described main control unit, for detecting the temperature in described gas channel, and by described inspection The actual temperature surveyed passes to described main control unit and processes；

Described main control unit according to described actual temperature value control to adjust described fan running voltage, wherein, described wind speed with The inversely proportional relation of described actual temperature value.

Scialyscope wind speed detection device the most according to claim 2, it is characterised in that described detection device includes that storage is single Unit, described memory element is connected with described main control unit, is used for storing preset temperature value, and described preset temperature value is described projection When machine, Air Filter the most normally work, the equilibrium temperature value that described temperature sensor records.

Scialyscope wind speed detection device the most according to claim 2, it is characterised in that described detection device also includes timing Unit, described timing unit is connected with described main control unit, temperature sensor respectively；For recording described temperature sensor collection The time of temperature.

Scialyscope wind speed detection device the most according to claim 2, it is characterised in that described heating element is heating resistor.

Scialyscope wind speed detection device the most according to claim 2, it is characterised in that described detection device also includes reporting to the police Unit, described alarm unit is connected with described main control unit.

Scialyscope wind speed detection device the most according to claim 6, it is characterised in that described alarm unit is audio alert At least one in device, buzzer or display lamp.

8. a scialyscope, including the scialyscope wind speed detection device as described in arbitrary in claim 1～7.

Scialyscope the most according to claim 8, it is characterised in that described scialyscope also includes drain pan, and described drain pan sets Having at least two draw-in groove, described Air Filter to be provided with at least two buckle, described Air Filter is by described buckle and described draw-in groove Coordinate the air inlet end being arranged in described gas channel mutually.