CN100407045C

CN100407045C - Inlet structure

Info

Publication number: CN100407045C
Application number: CN031277268A
Authority: CN
Inventors: 许年辉; 吴上炫; 苏文贤
Original assignee: Coretronic Corp
Current assignee: Coretronic Corp
Priority date: 2003-08-08
Filing date: 2003-08-08
Publication date: 2008-07-30
Anticipated expiration: 2023-08-08
Also published as: CN1580943A

Abstract

The present invention relates to an air inlet structure which is arranged in a projecting device provided with a heating element. The air inlet structure comprises an air inlet, an air guide pipe and a fan, wherein the air inlet is arranged on a projecting device shell; the inlet end of the air guide pipe is connected to the air inlet, the outlet end is positioned at one side of the heating element, and the fan is positioned nearby the heating element. Outside air current centralizes and enters the device by the air guide pipe by the air inlet through the air exhaust of the fan, and the outside air current is directly guided and flows across the heating element so that the air current performs a maximum effect so as to cool the heating element. Consequently, a cooling effect of the heating element is enhanced.

Description

Air intake structure

Technical field

The present invention relates to a kind of air intake structure, relate in particular to a kind of air intake structure that is applied to projection arrangement.

Background technology

Consult Fig. 1, Fig. 2 and Fig. 3, the air intake structure 11 of known projection arrangement 10 is offered several air admission holes 111 on projection arrangement 10 lower covers 12, and a fan 112 is set near air admission hole 111, with the heater element in the light engine housing 14 13 as: integrated post (integration rod), relay, condenser or the like are arranged near the air admission hole 111, when starting fan 112, ambient air stream is evacuated in the projection arrangement 10 by air admission hole 111, and flowing through, airflow near the heater element 13, uses cooling heating element 13.

Yet 112 in air admission hole 111 and fan do not have diversion Design, therefore ambient air stream will also flow into fan 112 as big as you please with path the shortest or that impedance is minimum, make radiating airflow can not concentrate on heater element 13, so that the maximum radiating effect of performance comes cooling heating element 13; And settling mode is to utilize the area that increases number of fans, rotating speed or increase air admission hole 111 to increase air mass flow at present, to improve the cooling effectiveness of heater element 13, but this mode easily causes light and the noise in the device 10 to be let out by air admission hole 111, influences the audiovisual impression thereby cause fan noise to improve.

Summary of the invention

One object of the present invention provides a kind of air intake structure, utilizes guide duct setting to concentrate intake, makes airflow can bring into play maximum efficiency and comes cooling heating element, avoids increasing number of fans and rotating speed, thereby reduces the temperature of heater element.

Another object of the present invention provides a kind of air intake structure, utilizes guide duct guiding air near heater element, makes the cooling air heater element of can directly flowing through, and reaches the radiating efficiency that improves forced convertion.

Another purpose of the present invention provides a kind of air intake structure, utilizes the setting of guide duct, dwindles the air inlet area, effectively blocks light leak and noise.

For achieving the above object, air intake structure of the present invention is arranged on one to have in the projection arrangement of heater element, this air intake structure comprises air intake opening, guide duct and fan, wherein air intake opening is opened on the projection arrangement, the guide duct inlet end is connected in air intake opening, endpiece is positioned at heater element one side, and fan is positioned near the heater element; Utilize the fan exhausting to make the device internal gas pressure be lower than external atmospheric pressure, force ambient air stream to concentrate air intake to device through guide duct by air intake opening, directly lead and the heater element of flowing through, make airflow can bring into play maximum efficiency and come cooling heating element, thereby reduce the temperature of heater element.

Description of drawings

For the technology used in the present invention means and all the other effects of achieving the above object, now lift two preferred embodiments and conjunction with figs. and be illustrated, in the accompanying drawing:

Fig. 1 is the stereographic map of known projection arrangement air inlet structure;

Fig. 2 is the exploded view of known projection arrangement air inlet structure;

Fig. 3 is the air flow synoptic diagram of known projection arrangement air inlet structure;

Fig. 4 is the stereographic map of air inlet structure of the present invention;

Fig. 5 is the exploded view of air inlet structure of the present invention;

Fig. 6 is the synoptic diagram of air inlet structure of the present invention;

Fig. 7 is the synoptic diagram of another air inlet structure of the present invention.

Embodiment

Consult Fig. 4 and Fig. 5, air intake structure 30 of the present invention is arranged in the projection arrangement 20, is provided with heater element 21 in the projection arrangement 20, as: integrated post, relay, condenser, electronic component or colour wheel or the like, heater element 21 is installed in the light engine housing 22.

Air intake structure 30 comprises an air intake opening 31, a guide duct 32 and a fan 33; Wherein air intake opening 31 is located at projection arrangement 20 bottoms; Guide duct 32 is the hollow tube in air channel always, the number of guide duct 32 can be according to the number or the different concentrated position setting of heater element 21, and inlet end 321 is connected in air intake opening 31, the area of air intake opening 31 is set according to the area of guide duct 32, direct airflow is concentrated in guide duct 32 enters projection arrangement 20 by air intake opening 31, guide duct 32 endpiece 322 are positioned on the heater element 21, and try one's best near heater element to improve direct cooling effect, guide duct 32 is positioned at heater element 21 (as: integrated post) downside in the present embodiment, and with heater element 21 certain distance (about 1～10mm) is arranged; Fan 33 is positioned near the heater element 21, makes the guiding ambient air stream flow in the projection arrangement 20 and the heater element 21 of can flowing through.

Consult Fig. 6, when starting fan 33, make the air pressure in the projection arrangement 20 be lower than external atmospheric pressure and form negative pressure, forcing ambient air stream to enter the back by air intake opening 31 drains in the projection arrangement 20 by guide duct 32 guidings, directly flow through and be positioned at the heater element 21 of guide duct 32 endpiece 322, to change thermal-boundary-leyer thickness and to improve forced convertion, to increase heat transfer efficiency, reach effective cooling heating element 21, take away the heat radiation air by fan 33 at last.

Because the setting of guide duct 32, can concentrate the air that enters by air intake opening 31, and guiding is positioned at the heater element 21 in guide duct 32 exits 322 fully, utilize cross-current to cool off and improve radiating efficiency, therefore, can make ambient air stream give full play to usefulness and cool off heater element 21 in the projection arrangement 20, compare with the air intake structure of known nothing guiding design, the area that air intake structure 30 of the present invention does not need to increase air intake opening 31 improves intake, perhaps increase number of fans, rotating speed can be effectively reduces by 20～30 ℃ with the temperature of heater element 21, heater element 21 maintains under the allowable temperature, guarantee that its functional operation is normal, fiduciary level and life-span be reason high temperature and decaying not.

In addition,, improve the effect and the intake of cooling heating element 21, make the area reduction of the comparable known air intake structure of area of air intake opening 31, so can lower light leak and noise owing to utilize the design of guide duct 32 that air intake is concentrated.

Consult shown in Figure 7, guide duct 32A also has the hollow tube in tortuous airflow path, more effectively to block light leak or noise, endpiece 322A with guide duct 32A in the present embodiment vertically bends, and connect several branch pipes 323 at endpiece 322A, the airflow guiding is distributed in heater element 21A, 21B, the 21C of diverse location, the number of branch pipe 32 3 and distributing position are provided with according to heater element 21, detach by fan 33 air that will dispel the heat again, with cooling heating element.

The above only is preferred embodiment of the present invention for convenience of explanation, and scope of the present invention is not limited to these preferred embodiments, and is all according to any change that the present invention made, and all belongs to claim scope of the present invention under the essence of the present invention not breaking away from.

Claims

1. an air intake structure is arranged at the projection arrangement with at least one heater element, and described air intake structure comprises:

At least one air intake opening, it is arranged on the described projection arrangement;

At least one guide duct, it is arranged in the described projection arrangement, and its inlet end directly is connected described air intake opening, and endpiece is positioned near the described heater element; And

One extraction fan is arranged in the described projection arrangement and is positioned near the described heater element, and to the inner exhausting of described projection arrangement, make described projection arrangement internal gas pressure be lower than ambient pressure, make ambient air stream, by described air intake opening, through this guide duct, the heater element of flowing through;

There are not other fans between the inlet end of wherein said guide duct and the described air intake opening.

2. air intake structure as claimed in claim 1, wherein said guide duct have tortuous airflow path.

3. air intake structure as claimed in claim 2, the endpiece of wherein said guide duct connects at least one branch pipe.

4. air intake structure as claimed in claim 1, wherein said guide duct has straight air channel.

5. air intake structure as claimed in claim 4, the endpiece of wherein said guide duct connects at least one branch pipe.

6. air intake structure as claimed in claim 1, wherein said guide duct endpiece is near described heater element.

7. air intake structure as claimed in claim 1, wherein said fan are positioned near heater element and the guide duct, with the guiding ambient air stream heater element of flowing through.

8. air intake structure as claimed in claim 1, wherein said guide duct inlet end area is provided with according to the air intake opening area.

9. air intake structure as claimed in claim 1, wherein said guide duct number is provided with according to the heater element number.

10. air intake structure as claimed in claim 1, the distance between wherein said heater element and guide duct outlet is 1～10mm.

11. air intake structure as claimed in claim 1, wherein said heater element can be integrated posts.

12. air intake structure as claimed in claim 1, wherein said heater element can be relays.

13. air intake structure as claimed in claim 1, wherein said heater element can be condensers.

14. air intake structure as claimed in claim 1, wherein said heater element can be electronic components.

15. air intake structure as claimed in claim 1, wherein said heater element can be colour wheels.