CN216083380U

CN216083380U - Projector self-adaptive air duct heat dissipation device and projector

Info

Publication number: CN216083380U
Application number: CN202122340365.7U
Authority: CN
Inventors: 余长新
Original assignee: Shenzhen Caiyi Photoelectric Technology Co ltd
Current assignee: Shenzhen Caiyi Photoelectric Technology Co ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-03-18
Anticipated expiration: 2031-09-23

Abstract

The utility model relates to a self-adaptive air duct heat dissipation device for a projector, which comprises a guide air duct, a guide air duct and an air flow generator, wherein the air flow generator is arranged at an air inlet of the guide air duct, the air inlet of the guide air duct is sleeved at an air outlet of the guide air duct, the air outlet of the guide air duct faces a heat source arranged in an optical machine shell, the guide air duct is fixed on the optical machine shell through a rotating shaft and can rotate around the rotating shaft, and the center of gravity of the guide air duct is positioned at the lower part of the rotating shaft so that the air outlet of the guide air duct is always positioned at the lower side of the heat source. The utility model also relates to a projector. According to the utility model, the external air passes through the heat source from bottom to top under the action of gravity, so that the phenomenon that the temperature in the machine is out of control due to secondary invasion of the heat source caused by hot air flow backflow is effectively avoided, the smoothness of an air path in the machine can be effectively ensured, and the normal work of the heat source is ensured.

Description

Projector self-adaptive air duct heat dissipation device and projector

Technical Field

The utility model relates to the technical field of projectors, in particular to a projector self-adaptive air duct heat dissipation device and a projector.

Background

The projector belongs to precise electro-optical equipment, has higher requirement on the temperature of the operating environment, is a relatively closed space inside most projectors, blows cold air out of a fan, is guided by a wind path pipeline, and is used for radiating and ventilating specific lens heat sources, and when the operating environment exceeds the limit temperature condition set inside the projector, the projector cannot be started to operate. Along with the difference of installation scenes, the requirements on environment temperature and humidity are extremely high, the condition that the projector is limited to be applied in more fields and the improper temperature environment can cause the service lives of a light source device and a liquid crystal screen assembly to be shortened, so that the service life of the projector is greatly reduced. With the development of projector technology, besides the installation requirement of normal projection, the projector also has installation modes such as side placement, vertical placement, hoisting and the like.

Since the projector housing is relatively closed, in the prior art, as shown in fig. 1-2, the existing heat dissipation device for the projector is generally disposed inside the projector housing and includes a fan 10, a temperature control module 20, and an air duct 30. The fan 10 is disposed at an inlet of the wind tunnel 30. The air duct 30 communicates with the outside air and the heat source 50 inside the optical chassis 40, and the temperature control module 20 is disposed behind the fan 10 along the air duct 30. The working principle is as follows: the fan 10 sucks outside air, detects the air through the temperature control module 20, and blows the air through the surface of the heat source 50 under the guidance of the air duct 30 to take away the surface heat of the heat source 50, so as to achieve the effect of heat dissipation, thereby ensuring the temperature of the heat source device of the projector and enabling the projector to work normally.

However, the conventional heat dissipation device for a projector has the following drawbacks. When it is installed in the forward direction as shown in fig. 1, i.e., with the upper casing member 1 up and the lower casing member 1 down, the outside air is blown only in the bottom direction toward the top direction because the air duct is fixed in position, and when it is installed in the reverse direction as shown in fig. 2, i.e., with the upper casing member 1 down and the lower casing member 1 up, the outside air is blown from the top toward the bottom direction. Due to the upward principle of hot air flow, heat reversely invades the heat source or circulates in the machine, which may cause abnormal temperature in the machine. Therefore, although the heat dissipation of the existing projector is good when the heat dissipation device is installed in the forward direction, the heat dissipation device can cause the backflow of the hot air flow when the heat dissipation device is installed in the reverse direction, which is not beneficial to the temperature control in the projector.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a self-adaptive air duct heat dissipation device of a projector and the projector, which can adapt to the forward and reverse installation of the projector and prevent the temperature in the projector from rising or being difficult to control due to the backflow of hot air.

The technical scheme adopted by the utility model for solving the technical problems is as follows: construct a projector self-adaptation wind channel heat abstractor, including guide wind channel, direction wind channel and air current generater, the air current generater sets up in the guide wind channel, the direction wind channel cover is established in the guide wind channel just the air outlet in direction wind channel sets up the heat source inside ray apparatus shell spare towards, the direction wind channel passes through the rotation axis to be fixed ray apparatus shell spare is last and can center on the rotation axis is rotatory, thereby the focus in direction wind channel is located thereby the lower part of rotation axis makes the air outlet in direction wind channel is located always the heat source downside.

In the projector adaptive air duct heat dissipation device according to the present invention, the optical chassis includes a first chassis and a second chassis disposed around the heat source, the guide air duct is located on a first side of the first chassis, the guide air duct includes a joint portion located on the first side of the first chassis and a guide portion located on a lower side of the first chassis, and the joint portion is sleeved in the guide air duct.

In the projector adaptive air duct heat dissipation device, the guide air duct, the joint part and the guide part are all horizontally arranged, the joint part is provided with an air inlet of the guide air duct, and the guide part is provided with an upward air outlet of the guide air duct.

In the projector adaptive air duct heat dissipation device, the inner diameter of the guide air duct is matched with the inner diameter of the joint part, and the inner diameter of the guide part is smaller than the inner diameter of the joint part.

In the projector adaptive air duct heat dissipation device of the present invention, the air flow generator includes a fan disposed at an air inlet of the guide air duct, the air inlet is circular, and a diameter of the fan is adapted to an inner diameter of the air inlet.

The projector self-adaptive air duct heat dissipation device further comprises a temperature control module arranged in the guide air duct, wherein the temperature control module is electrically connected with the air flow generator to control the operation of the air flow generator based on the detected inlet air temperature.

The other technical scheme adopted by the utility model for solving the technical problem is as follows: a projector is constructed, and comprises a projector shell, a projector assembly arranged in the projector shell, an optical machine shell and the self-adaptive air duct heat dissipation device of the projector.

According to the projector self-adaptive air duct heat dissipation device and the projector, the guide air duct is designed to rotate relative to the guide air duct, and the gravity center of the guide air duct is positioned below the rotating shaft, so that the external air can pass through the heat source from bottom to top under the action of gravity no matter the projector is installed in the forward direction or in the reverse direction, the phenomenon that the heat source is invaded secondarily due to backflow of hot air is effectively avoided, the temperature in the projector is out of control, the smooth air path in the projector can be effectively guaranteed, and the normal work of the heat source is guaranteed.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic diagram of a prior art forward mounting of a heat sink for a projector;

FIG. 2 is a schematic view of a prior art inverted mounting of a heat sink for a projector;

FIG. 3 is a schematic diagram of a forward mounting manner of the adaptive air duct heat sink of the projector according to the present invention;

fig. 4 is a schematic diagram of a reverse installation manner of the adaptive air duct heat dissipation device of the projector according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further 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 utility model and are not intended to limit the utility model.

The utility model relates to a self-adaptive air duct heat dissipation device for a projector, which comprises a guide air duct, a guide air duct and an air flow generator, wherein the air flow generator is arranged at an air inlet of the guide air duct, the air inlet of the guide air duct is sleeved at an air outlet of the guide air duct, the air outlet of the guide air duct faces a heat source arranged in an optical machine shell, the guide air duct is fixed on the optical machine shell through a rotating shaft and can rotate around the rotating shaft, and the center of gravity of the guide air duct is positioned at the lower part of the rotating shaft so that the air outlet of the guide air duct is always positioned at the lower side of the heat source. According to the utility model, the guide air duct is designed to rotate relative to the guide air duct, and the gravity center of the guide air duct is positioned below the rotating shaft, so that outside air can pass through the heat source from bottom to top under the action of gravity no matter the guide air duct is installed in a forward direction or a reverse direction, and thus, the phenomenon that the temperature in the machine is out of control due to secondary invasion of the heat source caused by hot air flow backflow is effectively avoided, the smoothness of an air path in the machine can be effectively ensured, and the normal work of the heat source is ensured.

Fig. 3 is a schematic diagram of a forward mounting manner of the adaptive air duct heat dissipation device of the projector according to the present invention. Fig. 4 is a schematic diagram of a reverse installation manner of the adaptive air duct heat dissipation device of the projector according to the present invention. Referring to fig. 3-4, the adaptive air duct heat dissipation device for a projector according to the present invention includes a guide air duct 31, a guide air duct 32, and an airflow generator 10. The air flow generator 10 is provided in the guide duct 31 so as to suck the external cold air. The air flow generator 10 may be, for example, a fan or an air extractor, etc., as long as it can form air flows that can be conducted in the guide duct 31 and the guide duct 32. In the preferred embodiment of the present invention, the airflow generator 10 is preferably a fan, and the number and the position of the fans can be set according to actual needs, and are preferably arranged at the air inlet of the guiding air duct 31.

In a preferred embodiment of the present invention, as shown in fig. 3-4, the air inlet of the guiding air duct 31 is circular, and a circular fan is disposed at the air inlet, and the diameter of the fan is adapted to the inner diameter of the air inlet, i.e. equal to or slightly smaller than the inner diameter of the air inlet.

The guide air duct 32 is sleeved on the guide air duct 31, and an air outlet of the guide air duct 32 faces the heat source 50 arranged inside the optical machine casing. The guide air duct 32 is fixed to the optical chassis member by a rotating shaft 60 and can rotate around the rotating shaft 60, and the center of gravity of the guide air duct 32 is located at the lower portion of the rotating shaft 60 so that the air outlet of the guide air duct 32 is always located at the lower side of the heat source 50. The rotation axis 60 is preferably arranged on the center axis of the light housing part.

Therefore, the guide air duct is designed to rotate relative to the guide air duct, and the gravity center of the guide air duct is positioned below the rotating shaft, so that the external air can pass through the heat source from bottom to top under the action of gravity no matter the guide air duct is installed in a forward direction or a reverse direction, the phenomenon that the temperature in the machine is out of control due to secondary invasion of the heat source caused by backflow of hot air is effectively avoided, the smooth air path in the machine can be effectively ensured, and the normal work of the heat source is ensured.

In a preferred embodiment of the present invention, the opto-mechanical housing includes a first housing 41 and a second housing 42 disposed about the heat source 50. Here, the first casing 41 and the second casing 42 may be a complete circular casing formed integrally, or may be two casings joined by welding or other processes, and together form the optical mechanical casing. The light source 50 is housed in the light housing.

In the preferred embodiment shown in fig. 3-4, the guide duct 31 is located on a first side of the first casing member 41 (i.e., on the left side of the left casing member as viewed in the drawings). The guide duct 32 includes an engaging portion 321 also on the first side of the first housing member 41 and a guide portion 322 on the lower side of the first housing member 41. The engaging portion 321 is fitted in the guide duct 31 so as to communicate with the guide duct 31. The guide duct 31, the engaging portion 321, and the guide portion 322 are all horizontally disposed. The engaging portion 321 is provided with an air inlet of the guiding air duct 32, and the guiding portion 322 is provided with an upward air outlet 323. Since the guide portion 322 is horizontally disposed at the lower side of the optical chassis member, it is also located at the lower side of the heat source 50, and an upward air outlet 323 is provided thereon, so that the external cool air introduced from the guide duct 31 and guided through the guide duct 32 is supplied upward to the heat source 50.

As shown in fig. 3 to 4, the rotating shaft 60 is disposed on a central axis of the first casing member 41, and the guide duct 32 is rotatable about the rotating shaft 60. Of course, the rotating shaft 60 may be provided with any suitable position, as long as it can ensure that the center of gravity of the guide duct 32 is located at the lower portion of the rotating shaft 60, so that the guide duct 32 can be turned over to have the guide portion 322 located at the lower side of the first casing member 41 no matter how the whole projector is turned over, i.e., forward installation or reverse installation. Those skilled in the art will appreciate that this can be accomplished by providing a weight at the inlet end of the guide duct 32, similar to a tumbler.

Preferably, the guiding air duct 31, the joint portion 321 and the guiding portion 322 are preferably cylindrical air ducts, the inner diameter of the guiding air duct 31 is matched with the inner diameter of the joint portion 321, and the inner diameter of the guiding portion is smaller than the inner diameter of the joint portion 321.

The principle of the projector adaptive air duct heat dissipation device of the present invention is further described with reference to fig. 3-4. As shown in fig. 3, when the projector is installed in the forward direction, cool outside air is sucked through the airflow generator 10, guided by the guide duct 31, and horizontally moved to the right along arrow a. And the guide duct 32 rotates within the guide duct 31 around the rotation shaft 60 under the gravity, and the guide portion 322 rotates to be located below the first housing member 41. The external cool air continues to move horizontally to the right in the guide 322 along arrow a and then reaches the air outlet 323. Since the outlet 323 is disposed upwardly, the cool external air will continue to move upwardly along arrow A past the bottom of the heat source 50 and continue to move upwardly, thereby blowing the hot air stream upwardly from the bottom of the heat source 50. Since the hot gas flow is less dense than the cold air, the hot gas flow will continue to move upward. When the projector is installed in the reverse direction, as shown in fig. 4, the outside cool air is sucked in through the airflow generator 10, guided by the guide duct 31, and horizontally moved to the right along the arrow a. And the guide duct 32 rotates within the guide duct 31 around the rotation shaft 60 under the gravity, and the guide portion 322 rotates to be located below the first housing member 41. The external cool air continues to move horizontally to the right in the guide 322 along arrow a and then reaches the air outlet 323. Since the outlet 323 is disposed upwardly, the cool external air will continue to move upwardly along arrow A past the bottom of the heat source 50 and continue to move upwardly, thereby blowing the hot air stream upwardly from the bottom of the heat source 50. Since the hot gas flow is less dense than the cold air, the hot gas flow will continue to move upward.

Therefore, according to the self-adaptive air duct heat dissipation device for the projector, the guide air duct is designed to rotate relative to the guide air duct, and the gravity center of the guide air duct is positioned below the rotating shaft, namely, one end of the air inlet of the guide air duct is heavier, so that under the action of gravity, no matter the guide air duct is installed in a forward direction or a reverse direction, outside air can pass through the heat source from bottom to top under the action of gravity, the phenomenon that the heat source is invaded secondarily due to backflow of hot air is effectively avoided, the temperature in the projector is out of control, the phenomenon of disordered air flow caused by forward and reverse installation is fundamentally solved, the smooth air path in the projector is ensured, and the normal operation of equipment is ensured.

Although the guide duct 31, the guide duct 32 and the airflow generator 10 are installed at the left side of the first casing 41 in the preferred embodiment shown in fig. 3 to 4, it is known to those skilled in the art that the guide duct, the guide duct and the airflow generator may be installed at the right side of the second casing 42 to implement the present invention, and the description thereof will not be repeated.

In a further preferred embodiment of the present invention, a temperature control module 20 is further disposed in the guiding air duct 31, and the temperature control module 20 is electrically connected to the airflow generator 10 to control the operating frequency of the airflow generator 10 based on the detected temperature of the inlet air. The temperature control module 20 may include a temperature sensor and a control chip, the temperature sensor may be configured to detect an intake air temperature entering the projector, and the control chip compares the intake air temperature with a preset temperature, so as to adjust the operating frequency of the airflow generator 10 based on the comparison result, such as reducing or increasing the rotation speed of the fan, and further ensure reliable operation of the projector.

The utility model further relates to a projector, which comprises a projector shell, a projector component arranged in the projector shell, an optical machine shell and the projector self-adaptive air duct heat dissipation device. As shown in fig. 3-4, the projector housing may be constructed of an upper housing member 1 and a lower housing member 2. The optical machine shell component and the projector component are arranged in the accommodating space enclosed by the upper shell component 1 and the lower shell component 2. A heat source 50 is disposed in the light housing member. The self-adaptive air duct heat dissipation device of the projector comprises a guide air duct 31, a guide air duct 32 and an air flow generator 10.

As known to those skilled in the art, the projector assembly, the projector housing, the carriage member and the heat source of the projector can be constructed according to the existing projector. The adaptive air duct heat sink for the projector can be constructed according to the embodiments shown in fig. 3-4, and will not be described in detail herein.

According to the projector, the guide air channel is designed to rotate relative to the guide air channel, and the gravity center of the guide air channel is located below the rotating shaft, so that outside air can pass through the heat source from bottom to top under the action of gravity no matter the projector is installed in the forward direction or the reverse direction, the phenomenon that the temperature in the projector is out of control due to secondary invasion of the heat source caused by backflow of hot air is effectively avoided, the smooth air path in the projector can be effectively guaranteed, and the normal work of the heat source is guaranteed.

While the utility model has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from its scope. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a projector self-adaptation wind channel heat abstractor, its characterized in that, is including guide wind channel, direction wind channel and air current generater, the air current generater sets up in the guide wind channel, the direction wind channel cover is established in the guide wind channel just the air outlet in direction wind channel sets up the heat source inside ray apparatus shell spare towards setting, the direction wind channel passes through the rotation axis to be fixed ray apparatus shell spare is last and can center on the rotation axis is rotatory, thereby the focus in direction wind channel is located thereby the lower part of rotation axis makes the air outlet in direction wind channel is located always the heat source downside.

2. The projector adaptive air duct heat dissipation device according to claim 1, wherein the optical chassis includes a first chassis and a second chassis disposed around the heat source, the guide air duct is located on a first side of the first chassis, the guide air duct includes a joint portion located on the first side of the first chassis and a guide portion located on a lower side of the first chassis, and the joint portion is sleeved in the guide air duct.

3. The projector adaptive air duct heat dissipation device according to claim 2, wherein the guiding air duct, the joint portion, and the guide portion are all horizontally disposed, an air inlet of the guiding air duct is disposed on the joint portion, and an upward air outlet of the guiding air duct is disposed on the guide portion.

4. The projector adaptive air duct heat sink according to claim 3, wherein an inner diameter of the guide air duct is adapted to an inner diameter of the joint portion, and an inner diameter of the guide portion is smaller than the inner diameter of the joint portion.

5. The adaptive air duct heat sink for projectors of claim 1, wherein the airflow generator comprises a fan disposed at an air inlet of the guiding air duct, the air inlet is circular, and a diameter of the fan is adapted to an inner diameter of the air inlet.

6. The adaptive air duct heat sink for projectors of any one of claims 1-5, further comprising a temperature control module disposed in the guiding air duct, the temperature control module electrically connected to the air flow generator to control the operation of the air flow generator based on the detected temperature of the inlet air.

7. A projector, comprising a projector housing, a projector assembly disposed in the projector housing, an optical chassis member, and the projector adaptive air duct heat sink according to any one of claims 1-6.