CN100390661C

CN100390661C - Projection radiator

Info

Publication number: CN100390661C
Application number: CNB02160438XA
Authority: CN
Inventors: 吴上炫; 许年辉; 粘庆忠
Original assignee: Coretronic Corp
Current assignee: Coretronic Corp
Priority date: 2002-12-30
Filing date: 2002-12-30
Publication date: 2008-05-28
Anticipated expiration: 2022-12-30
Also published as: CN1512262A

Abstract

The present invention relates to a projection radiator which comprises a first cooling path and a second cooling path, wherein the first cooling path is provided with a temperature sensing element and an exhaust fan which are respectively arranged at the inlet end and the outlet end of the cooling path; the second cooling path is provided with a temperature sensing element, a power supply unit and a guiding fan. When environment temperature is changed or different voltage is input, the temperature sensing elements arranged on the first cooling path and the second cooling path can respectively adjust the rotational speed of two sets of fans in time according to detection temperature so that an optimal cooling effect is obtained. The present invention prevents noise and extends the service life of the fans.

Description

The projection heat abstractor

Technical field

The present invention relates to a kind of heat abstractor, relate in particular to the heat abstractor that uses in a kind of projection display equipment.

Background technology

Because the high image quality and the convenience of projection display equipment make projection display equipment that the trend of popularizing day by day be arranged all over the world; The main heat of general projection display equipment has 75% to come from bulb approximately, and 25% comes from power-supply unit.

Known projection display equipment 10 mainly comprises bulb 11, light engine 12, power-supply unit 13 and heat abstractor 14, wherein heat abstractor 14 utilizes a fan 141 and several wind deflectors of

configuration

142A, 142B, 142C, the cooling draught that fan 141 is provided is directed to bulb 11 in proper order, optical machine engine 12 and power-supply unit 13, but it is long apart from bulb 11 its cooling paths that fan 141 is far away, cause the cooling energy loss, and the optical machine engine 12 and the power-supply unit 13 of contiguous fan 141, then bad because of the design of

light guide plate

142A and 142C, cause cooling effect limited.The difference of each national standard input voltage value (interchange) of this external cause, the heat energy that each power component (for example: the power factor (PF) of resistance, electric capacity, diode, coil etc. can change thereupon) in the power-supply unit 13 produces will decrease or raise, cause each component temperature difference in the projection display equipment, therefore known projection display equipment can not reach best radiating effect by single heat abstractor 14.

Simultaneously, the employed heat abstractor of known projection display equipment can not be according to the variation of input voltage value, adjust the rotating speed of fan in good time, therefore not only can't reach the function of instant cooling power-supply unit 13, also can't be at the difference of various places input voltage or environment for use temperature, the instant rotation speed of the fan of adjusting is to reach best cooling effect.

Summary of the invention

One object of the present invention is to provide a kind of projection heat abstractor, by the different temperatures check point, controls heat abstractor individually, with in good time raising cooling effect.

Another object of the present invention is to provide a projection heat abstractor,, provide heater element optimal air quantity demand, avoid fan operation under high rotating speed for a long time, to improve fan serviceable life and to prevent noise by instant adjustment rotation speed of the fan.

For reaching above-mentioned purpose, projection heat abstractor of the present invention comprises first cooling path, and it has a temperature sensor, is separately positioned on the entrance end of this cooling path with an extraction fan; And second cooling path, it has a temperature sensor, a power-supply unit and a guiding fan; When environment temperature changes or imports different voltage, set temperature sensor on first and second cooling path can be according to detected temperatures, the instant respectively rotating speed of adjusting two groups of fans, to obtain best cooling effect, prevent noise and prolong fan serviceable life.

Description of drawings

Fig. 1 shows known projection display equipment structural drawing;

Fig. 2 shows the synoptic diagram of projection heat abstractor of the present invention;

Fig. 3 shows the synoptic diagram of projection heat abstractor of the present invention.

Embodiment

For achieving the above object, technological means that is adopted and effect thereof are now lifted preferred embodiment and conjunction with figs. and are illustrated as follows.

Consult Fig. 2, projection display equipment 20 of the present invention, comprise mainly by heat abstractor 21, bulb 22, light engine 23 and have the supply (LVPS) 241 of LVPS and the power-supply unit 24 of ballast resistor (Ballast) 242 that wherein 24 of light engine 23 and power-supply units separate with a dividing plate 25 differentiations.

Consult Fig. 3, heat abstractor 21 of the present invention mainly comprises two

temperature sensor

211A, 211B, two guiding

fan

212A, 212B and two

extraction fan

213A, 213B; Wherein the first temperature sensor 211A is arranged near the air air inlet of light engine 23, detection enters the air themperature of projection display equipment 20, the airflow of introducing is behind light engine 23, the part air is guided fan 212A suction streams through bulb 22 rear sides by first, discharge projection display equipment 20 by the first extraction fan 213A again, form first cooling path 26; In addition, air inlet near power-supply unit 24 1 ends, the airflow order of introducing is behind the LVPS supply (LVPS) 241 and ballast resistor 242 of power-supply unit 24, by the second guiding fan 212B suction that is located at power-supply unit 24 other ends, the flow through inside and the front side of bulb 22, last air is discharged projection display equipment 20 by the second extraction fan 213B, and between the second guiding fan 212B and power-supply unit 24, establish one second temperature sensor 211B, form second cooling path 27.

Heat abstractor 21 of the present invention is positioned at the first temperature sensor 211A of first cooling path, 26 inlets, detect the gained environment temperature with abundant cool down optical 23 and bulb 22 according to air inlet, the instant guiding fan 212A that adjusts, extraction fan 213A, the suitable rotating speed of 213B, make whole projection display equipment, i.e. first and

second cooling paths

26,27 obtain an amount of cooling air, with variation according to ambient temperature, suitably raise or the reduction rotation speed of the fan, avoid fan to reduce fan life with the excessive speeds continuous running, and minimizing noise, or cross slow-speed of revolution running and cause the projection display equipment heat radiation bad, influence optical element efficient and reduce projection quality.Have again, the first temperature sensor 211A is arranged on air inlet, also can avoid temperature sensor 211A to be subjected to the interference of projection display equipment temperature variation, so that detect correct variation of ambient temperature; In addition, when the different voltages of voltage input end 28 inputs, cause the reduction of LVPS supply 241 and ballast resistor 242 temperature or when raising, the second temperature sensor 211B can be according to detected temperatures, the instant separately rotating speed of adjusting the second guiding fan 212B, LVPS supply 241 and ballast resistor 242 are suitably cooled off in good time, do not influence other rotation speeds of the fan, therefore can avoid the unnecessary rising of other rotation speeds of the fan and reduce fan life, and minimizing noise, or rotating speed reduces and to cause the projection display equipment heat radiation bad, thereby reduces projection quality.

The above only is for ease of preferred embodiment of the present invention is described, scope of the present invention is not limited to preferred embodiment, and is all according to any change that the present invention did, and do not breaking away under the essence of the present invention, all belongs to claim scope of the present invention.

Claims

1. projection heat abstractor comprises:

First cooling path, its entrance point is provided with a temperature sensor, and endpiece is provided with an extraction fan;

One light engine is positioned on first cooling path;

Second cooling path is provided with a guiding fan and a temperature sensor therebetween; And

One power-supply unit is positioned on second cooling path,

The temperature sensor of wherein said second cooling path is arranged between guiding fan and the power-supply unit.

2. projection heat abstractor according to claim 1, wherein said first cooling path also comprise a bulb and a guiding fan, guiding fan pumping unit air-cooled lamp bubble.

3. projection heat abstractor according to claim 1, wherein said power-supply unit comprise a LVPS supply and a ballast resistor.

4. projection heat abstractor according to claim 1, wherein said second cooling path also comprises a bulb and an extraction fan, and extraction fan is located at the second cooling path endpiece, and bulb is located between guiding fan and the extraction fan.

5. projection heat abstractor according to claim 4, the temperature that detects according to the temperature sensor of first cooling path wherein, the rotating speed of extraction fan etc. of extraction fan, guiding fan and second cooling path of first cooling path is adjusted in control.

6. projection heat abstractor according to claim 1, the temperature that detects according to the temperature sensor of second cooling path wherein, the rotating speed of the guiding fan of second cooling path is adjusted in control.