JP2006133649A - Cooling fan apparatus and projector using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling fan apparatus, capable of shielding radiant heat on a motor from a cooled object without adding another member, also, capable of cooling the motor for rotating an impeller for generating cooling air current, then, capable of reducing the manufacturing cost to that extent, and to provide a projector that uses the cooling fan apparatus. <P>SOLUTION: An air flow part 251 is arranged facing the motor 22, and a gap 250 for making the air flow is formed between the air flow part 251 and the motor 22; and an air guide part 252 is connected to the air flow part 251 and arranged opposite to a region where the impeller 23 is rotated. The air current generated by the impeller 23 is taken in part into the air guide part 252, then is made to flow into the gap 250 and cools the motor 22. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a fan that cools a light source of a projector that projects by splitting and irradiating light emitted from a light source, and relates to cooling of a motor for driving the fan.

In recent years, many projectors using DLP (Digital Light Processing) (registered trademark) technology have been manufactured. The projector using the DLP (registered trademark) technology irradiates light to a DMD (Digital Mirror Device) (registered trademark) in which a large number of reflectors are arranged on a semiconductor element, and magnifies the reflected light from the reflector with a lens. To project.

FIG. 5 shows a schematic layout of a conventional projector. A projector B shown in FIG. 5 equalizes the light flux density in the axial direction of light transmitted through the color wheel 92, a white lamp 91 as a light source, a color wheel 92 for sequentially polarizing the light to the wavelengths of the RGB components. An optical tunnel 93, a mirror 94 that expands the irradiation range while reflecting light emitted from the optical tunnel 93, a DMD (registered trademark) 95 that reflects the light that is reflected by the mirror 94 and expands the irradiation range, and projection And a lens 96. By irradiating the screen Sc with light emitted from the projection lens 96, an image can be projected onto the screen Sc.

While the projector B projects an image on the screen Sc, the white lamp 91 continues to emit light. In the projector B, in order to project a vivid image on the screen Sc, the intensity of light emitted from the white lamp 91 that is a light source is high, and the white lamp 91 becomes high temperature. The white lamp 91 is detachably attached to the lamp holder 911. Since the life of the white lamp 91 is shortened if the white lamp 91 is continuously operated at a high temperature, a cooling fan 97 is attached. The cooling fan device 97 sends cold air to the white lamp 91 to cool the white lamp 91.

FIG. 6 is a perspective view of a conventional cooling fan device. The cooling fan device 97 shown in FIG. 6 includes a frame 970, a motor 971, an impeller 972 rotated by the motor 971, and a support member 97 fixed to a lamp holder 911 that supports the frame 970 and supports the white lamp 91.
3. The motor 971 operates to heat itself and is further heated by radiant heat from the white lamp 91. The motor 971 is also operated at a high temperature, which causes problems such as a shortened life and unstable operation. Therefore, a metal cooling member 974 is disposed between the motor 971 and the white lamp 91. Cooling member 974
Is fixed to the support member 973. By attaching the cooling member 974, heat radiation can be reduced.
JP-A-8-321571 JP 2002-335647 A

However, when the cooling fan device 97 having the above configuration is used, the metal cooling member 9 is used.
74 must be manufactured and attached, and the number of components of the cooling fan device 97 increases.
When the number of components increases, the manufacturing cost increases, and it takes time and labor to assemble. Further, only the metal cooling member 974 is disposed between the white lamp 91 and the motor 971, and heating by the radiant heat from the white lamp 91 can be reduced, but the motor 971 itself is heated by driving the motor 971. Can not be reduced.

Therefore, the present invention can block the radiant heat from the article to be cooled to the motor without adding another member, and can cool the motor for rotating the impeller that generates the cooling airflow. Another object of the present invention is to provide a cooling fan device and a projector using the same that can reduce the manufacturing cost.

In addition, the present invention can block the radiant heat from the article to be cooled to the motor without adding another member, can cool the motor, and can sufficiently bring out the motor performance. It is an object of the present invention to provide a cooling fan device that can increase the cooling capacity of the apparatus and extend the life of the entire apparatus and a projector using the same.

In order to achieve the above object, the present invention provides a white lamp that is supported by a lamp holder and emits white light, a cooling fan device that cools the white lamp, and rotating the white light as R.
A disk-shaped color wheel that splits light with a wavelength of / G / B, a rod tunnel that equalizes the light flux density of the light split by the liquid crystal filter, and the irradiation range of the light that exits the rod tunnel is expanded. And a DMD (including a reflector for reflecting the light transmitted through the lens)
(Registered trademark) and a projection lens that projects light onto a screen, and the cooling fan device includes a frame, and a motor disposed in the center of a through hole formed in the center of the frame,
An impeller disposed in the through-hole and generating cooling air by being rotated inside the through-hole by the motor, and a support member that supports the frame, the support member being the lamp holder The cooling fan device can be disposed adjacent to the white lamp, and the support member penetrates the portion where the frame is disposed to allow cooling air generated by the impeller to pass therethrough. A hole is provided, and a cooling part that is supported by the support member and cools the motor is provided at the center of the through hole, and the cooling part faces the motor between the motor and the white lamp. And an air flow portion disposed with a gap through which air can flow between the motor and a part of the air flow portion, and a rotation of the impeller in the through hole. Territory And a portion opposed to the air inlet portion is formed of the air introducing portion is a part or the whole is formed inclined to the impeller side with respect to the air flow section,
A projector is provided that includes an airflow rectifying unit that protrudes from a surface on the impeller side and extends in a radial direction of the impeller.

According to this configuration, the radiant heat from the white lamp, which is one of the heat sources of the projector, is blocked by the cooling unit, and part of the airflow generated by the impeller is captured by the air introduction unit, so that the air flow The motor is cooled by the airflow.

As the motor is cooled, the motor is operated while being cooled, so that it is difficult for the capacity to be reduced due to heat, and the motor can exhibit a high capacity, and accordingly, the cooling capacity of the cooling fan device is increased. Can do. Moreover, since the load of the motor can be reduced by being cooled, the occurrence of the malfunction of the projector can be prevented.

The support member and the cooling unit may be an integrally formed member such as a resin. The integrally formed member is easy to manufacture, and it is not necessary to separately manufacture or assemble the member. Therefore, it is possible to reduce the time and effort of manufacturing and mounting. Can be shortened. Moreover, it is not limited to resin.

In addition, since the air introduction unit includes an air flow rectification unit, the air flow generated by the impeller can be effectively sent to the gap between the motor and the air flow unit, so that the motor is efficiently cooled. Is possible.

In order to achieve the above object, the present invention includes a light source supported by a holder, a cooling fan device that cools the light source, and a projection lens that projects light onto a screen.
The cooling fan device is disposed in the through hole formed in the center of the frame, a through hole formed in the center of the frame, and is cooled by being rotated in the through hole by the motor. It has an impeller that generates wind and a support member that supports the frame, and the cooling fan device can be disposed adjacent to the light source by connecting the support member to the holder, The support member is provided with a through hole for passing cooling air generated by the impeller in a portion where the frame is disposed, and a cooling unit that is supported by the support member and cools the motor in the center of the through hole. And the cooling unit is disposed between the motor and the light source with an air gap between the motor and the light source so as to face the motor and allow air to flow between the motor and the light source. A projector is characterized in that an air introduction part that is integrally connected to a part of the air flow part and faces a part of a rotation region of the impeller of the through hole is provided. .

By providing the cooling unit, it is possible to introduce a part of the air flow generated by the impeller to the motor into the gap between the motor and the air flow unit. Since the motor can be cooled with the airflow, the motor can be effectively cooled, and the trouble of the projector is less likely to occur.

The projector broadens a projection-type image forming apparatus capable of forming an image by spectrally and / or synthesizing light from a light source and projecting it on a screen.

In the above configuration, a part or all of the air introduction part may be formed to be inclined toward the impeller side. Furthermore, you may provide the airflow rectification | straightening part which protrudes from the surface of the said impeller side, and is extended in the radial direction of the said impeller. Thus, part or all of the air introduction part is inclined, so that part of the airflow generated by the impeller can be effectively introduced into the gap between the motor and the air flow part.

At this time, an example in which the airflow rectification unit is disposed at an end of the air introduction unit can be exemplified. By disposing at the end portion, the airflow can be more surely flowed into the gap between the motor and the air flow portion, and the cooling capacity can be increased.

As the support member, an integrally molded member of resin can be exemplified. In the case of an integrally molded member, the molding process of the member can be greatly shortened, and the manufacturing process, time, and cost of the projector can be reduced accordingly. Moreover, it is not limited to resin, and a moldable material can be widely adopted.

Furthermore, in order to achieve the above object, the present invention provides a frame having a through hole in the center, a motor disposed in the center of the through hole of the frame, and a motor disposed in the through hole. An impeller that generates cooling air by rotating inside the hole, and a support member that supports the frame, and the support member is generated by the impeller at a portion where the frame is disposed. A through hole for passing cooling air is provided, and a cooling unit is provided at the center of the through hole, supported by the support member, for cooling the motor, and the cooling unit includes the motor and the article to be cooled. An air flow part disposed between the motor and the air flow part disposed so as to allow air to flow between the motor and a part of the air flow part; and Through-hole And a part of the air introduction part is formed to be inclined toward the impeller side with respect to the air flow part, and the impeller There is provided a cooling fan device comprising an air flow rectifying unit protruding from a side surface and extending in a radial direction of the impeller.

According to this configuration, the radiant heat from the white lamp, which is one of the heat sources of the projector, is blocked by the cooling unit, and part of the airflow generated by the impeller is captured by the air introduction unit, so that the air flow The motor is cooled by the airflow.

As the motor is cooled, the motor is operated while being cooled, so that it is difficult for the capacity to be reduced due to heat, and the motor can exhibit a high capacity, and accordingly, the cooling capacity of the cooling fan device is increased. Can do. Moreover, since the load of the motor can be reduced by being cooled, it is possible to prevent the cooling fan device from occurring.

For example, an integrally molded member such as a resin can be raised as the support member and the previous cooling portion. The integrally formed member is easy to manufacture, and it is not necessary to separately manufacture or assemble the member, so that it is possible to reduce the time for manufacturing and mounting, and that is the time for manufacturing the cooling fan device. It is possible to shorten the time. Moreover, it is not limited to resin.

In addition, since the air introduction unit includes an air flow rectification unit, the air flow generated by the impeller can be effectively sent to the gap between the motor and the air flow unit, so that the motor is efficiently cooled. Is possible.

In order to achieve the above object, the present invention provides the cooling fan device which is disposed in a frame, a motor disposed in the center of a through hole formed in the center of the frame, and the through hole.
The motor has an impeller that generates cooling air by being rotated in the through hole, and a support member that supports the frame. The support member is disposed at a portion where the frame is disposed. A through hole for allowing cooling air generated by the impeller to pass therethrough is provided, and a cooling unit that is supported by the support member and cools the motor is provided at the center of the through hole. And an air flow part that is disposed between the article to be cooled and that faces the motor and allows air to flow between the motor and the motor, and a part of the air flow part. Provided is a cooling fan device characterized in that an air introduction portion that is connected and faces a part of a rotation region of the impeller of the through hole is formed.

By providing the cooling unit, it is possible to introduce a part of the air flow generated by the impeller to the motor into the gap between the motor and the air flow unit. Since the motor can be cooled by the airflow, the motor can be effectively cooled, and accordingly, the malfunction of the cooling fan device hardly occurs.

In the above configuration, a part or all of the air introduction part may be formed to be inclined toward the impeller side. Furthermore, you may provide the airflow rectification | straightening part which protrudes from the surface of the said impeller side, and is extended in the radial direction of the said impeller. Thus, part or all of the air introduction part is inclined, so that part of the airflow generated by the impeller can be effectively introduced into the gap between the motor and the air flow part.

At this time, an example in which the airflow rectification unit is disposed at an end of the air introduction unit can be exemplified. By disposing at the end portion, the airflow can be more surely flowed into the gap between the motor and the air flow portion, and the cooling capacity can be increased.

As the support member, an integrally molded member of resin can be exemplified. In the case of an integrally formed member, the member forming process can be greatly shortened, and the manufacturing process, time, and cost of the cooling fan device can be reduced accordingly. Moreover, it is not limited to resin, and a moldable material can be widely adopted.

According to the present invention, it is possible to block the radiant heat from the article to be cooled to the motor without adding another member, and to cool the motor for rotating the impeller that generates the cooling airflow. In addition, it is possible to provide a cooling fan device capable of reducing the manufacturing cost and a projector using the same.

In addition, according to the present invention, it is possible to block radiant heat from the article to be cooled to the tar without adding another member, and to cool the motor, so that the motor performance can be sufficiently extracted, Since the life of the motor can be extended, the cooling capacity of the apparatus can be increased, and a cooling fan apparatus and a projector using the cooling fan apparatus that can extend the life of the entire apparatus can be provided.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic layout of an example of a projector using a cooling fan device according to the present invention. The projector A shown in FIG.
A white lamp 1 that is a light source, a cooling fan device 2 that cools the white lamp 1, a color wheel 3 that sequentially polarizes light into wavelengths of RGB components, and a light flux density of light emitted from the light source is made uniform. It has a rod tunnel 4, a mirror 5 that expands the irradiation range of light that has passed through the rod tunnel 4, a DMD (registered trademark) 6 that reflects light, and a projection lens 7. The white lamp 1 is detachably attached to the lamp holder 11. Although a white lamp is used here as the light source, a light source that emits light having light of all the RGB wavelengths can be widely used besides the white lamp.

The operation of the projector A is as follows. Light is applied to the color wheel 3 from the white lamp 1. The color wheel 3 rotates at a high speed and a constant speed, and the light irradiated on the color wheel 3 passes through any of the R / G / B regions. At this time, the light transmitted through the R region is polarized into light of red wavelength, the light transmitted through the G region is polarized into light of green wavelength, and the light transmitted through the B region is polarized into light of blue wavelength. The The light of each color wavelength enters the rod tunnel 4 continuously.

DMD (registered trademark) 6 reflects irradiated light in a predetermined direction, passes through the rod tunnel 4, and expands the irradiation range by the mirror 5 for light of each wavelength of red, green, and blue. Of these, what is necessary is reflected by the projection lens 7. The light incident on the projection lens 7 is magnified and the screen Sc
Irradiated and displayed. The color wheel 3 rotates at a high speed, and even if the light of each wavelength of RGB selectively reflected by the DMD (registered trademark) 6 is sequentially irradiated on the screen, the human eye can combine the RGB corresponding to the amount of reflection. Recognize as a finished color.

The white lamp 1 reaches a high temperature while irradiating light, and is cooled by blowing low-temperature air taken from the outside of the projector A by driving the cooling fan device 2. By cooling, the white lamp 1 can irradiate light stably, and the lifetime of the white lamp 1 can be extended.

FIG. 2 is a perspective view of an example of the cooling fan device according to the present invention, and FIG. 3 is a horizontal sectional view of the cooling fan device shown in FIG. 2 includes a frame 21 and a motor 22.
And an impeller 23 and a support member 24. The frame 21 has a through hole 21 at the center.
1 is formed, and the motor 22 is disposed in the center of the through hole 211 and supported by the frame 21.

An impeller 23 is attached to the motor 22, and the impeller 23 also rotates when the motor 22 is driven. The impeller 23 has a shape capable of generating an airflow in the axial direction of the motor 22 (in the direction of the arrow ar1 in the figure) by rotating around the motor 22. Motor 22
Is arranged in the center of the through hole 211, the impeller 23 is inserted into the through hole 211 in the frame 2.
1 is arranged so as not to come into contact with 1, and is arranged so as not to come into contact with the frame 21 when rotating.

The frame 21 is attached to the support member 24 with the motor 22 and the impeller 23 attached. At this time, a spacer 26 is attached between the frame 21 and the support member 24. Although attachment is not limited to this, Here, what is screwed with the volt | bolt and nut which abbreviate | omitted illustration can be illustrated. Moreover, what can fix the flame | frame 21 to the support member 24 can be employ | adopted widely. After the motor 22 and the impeller 23 are attached to the frame 21, the cooling fan device 2 can be installed by attaching the frame 21 to the support member 24 and attaching the support member to the lamp holder 11.

A through hole 241 is formed in the portion of the support member 24 where the frame 21 is disposed,
An air flow generated by the rotation of the impeller 23 can pass therethrough.
In addition, a cooling unit 25 is provided at the central portion on the downstream side of the airflow generated by the impeller 23 of the through hole 241.
Is formed. The cooling part 25 is formed with an air flow part 251 and an air introduction part 252.

The air flow portion 251 is disposed to face the motor 22. The air introduction part 252 is connected to the air flow part 251, and is arranged to face the region where the impeller 23 rotates. As shown in FIG. 3, a gap 250 for air to flow is formed between the air flow portion 251 and the motor 22.

When the impeller 23 rotates and an airflow is generated, the airflow is supplied to the article to be cooled that is not shown in the drawing through the through hole 241 of the support member 24. At this time, of the airflow passing through the through hole 241, the airflow that hits the air introduction portion 252 flows as it is along the air introduction portion 252 and passes through the gap 250 formed between the air flow portion 251 and the motor 22. (Arrow ar2 in the figure). When the airflow taken in by the air introduction unit 252 passes through the gap 250, the motor 22 can be cooled by contacting the motor 22 and removing heat from the motor 22.

The tip of the air introduction part 252 shown in FIG. 3 is bent in the direction of the impeller 23. Since the air introduction part 252 is bent in this way, the air flow generated by the impeller 23 is changed to the air introduction part 2.
52, the air flows along the air introduction part 252, so that most of the air current flows to the air flow part 251.
Therefore, a higher cooling effect can be expected.

FIG. 4 shows an enlarged cross-sectional view of the air introduction part of the cooling fan device shown in FIG. As shown in FIG. 4, the air introduction part 252 has an air flow rectification part 253 on the surface on the impeller 23 side. The airflow rectification unit 253 protrudes from the air introduction unit 252 and has a shape extending in the radial direction of the impeller 23. By forming the air flow rectifying unit 253, the air flowing along the air introducing unit 252 can be effectively flowed into the gap 250 between the air flowing unit 251 and the motor 21, so that the motor 22 can be made highly efficient. It is possible to cool.

In the above embodiment, the case where the air introduction part 252 is bent is described as an example, but it may not be bent. If the air introduction part is not bent, the amount of air flowing into the gap 250 between the air flow part 251 and the motor 22 decreases, but it is not necessary to consider contact with the impeller 23 and it is easy to process. At this time, if the airflow rectification unit 253 is formed at the end of the air introduction unit 252, air does not flow out from the end, and the airflow can be efficiently sent to the gap 250, so that the motor can be effectively used. Can be cooled.

In the above embodiment, the air inlet 252 is provided with the airflow rectifier 253 as an example, but the present invention is not limited thereto, and the airflow rectifier 253 may not be provided. Also,
The air flow rectification unit 253 may be provided in the air flow unit 251. By providing the air flow rectification unit 253 in the air flow unit 251, the air flowing in from the air introduction unit 252 can be efficiently removed from the motor 22.
Therefore, the motor 22 can be efficiently cooled.

In the above embodiment, a white lamp used in a DLP (registered trademark) projector is described as an example of the article to be cooled by the cooling fan device. However, the invention is not limited thereto, and the article to be cooled is not limited thereto. As a light source, a light source of a projection type image forming apparatus that forms an image by spectrally combining or combining light from the light source and projects it on a screen can be widely used. Moreover, it is not limited to a light source, The article cooled by blowing air can be widely used as the article to be cooled.

1 is a schematic layout diagram of a projector using a cooling fan device according to the present invention. It is a perspective view of the cooling fan apparatus concerning this invention. FIG. 3 is a horizontal sectional view of the cooling fan device shown in FIG. 2. FIG. 3 is a vertical sectional view of the cooling fan device shown in FIG. 2. It is a schematic layout of a conventional projector. It is a perspective view of the conventional cooling fan.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 White lamp 11 Lamp holder 2 Cooling fan apparatus 21 Frame 22 Motor 23 Impeller 24 Support member 25 Cooling part 251 Air introduction part 252 Air flow part 253 Air flow rectification part 26 Spacer 3 Color wheel 4 Rod tunnel 5 Mirror 6 DMD (registered trademark)
7 Projection lens

Claims (8)

A white lamp that is supported by a lamp holder and emits white light, a cooling fan device that cools the white lamp, and a disk-shaped color that rotates and separates the white light into light having a wavelength of R / G / B A wheel, a rod tunnel that equalizes the light flux density of the light dispersed by the liquid crystal filter, a mirror that expands an irradiation range of the light emitted from the rod tunnel, and a reflector that reflects the light transmitted through the lens And a projection lens that projects light onto a screen,
The cooling fan device is disposed in the through hole formed in the center of the frame, a through hole formed in the center of the frame, and is cooled by being rotated in the through hole by the motor. It has an impeller that generates wind and a support member that supports the frame, and the cooling fan device can be disposed adjacent to the white lamp by connecting the support member to the lamp holder. ,
The support member is provided with a through hole for passing cooling air generated by the impeller in a portion where the frame is disposed, and is supported by the support member at the center of the through hole to cool the motor. Part is provided,
The cooling unit is disposed between the motor and the white lamp so as to face the motor and to have an air flow between the motor and the air flow unit. An air introduction part that is integrally connected to a part and faces a part of a rotation region of the impeller of the through hole is formed,
A part or all of the air introduction part is formed to be inclined toward the impeller side with respect to the air flow part, and includes an airflow rectification part that protrudes from a surface on the impeller side and extends in a radial direction of the impeller. Characteristic projector. A light source supported by a holder, a cooling fan device that cools the light source, and a projection lens that projects light onto a screen,
The cooling fan device is disposed in the through hole formed in the center of the frame, a through hole formed in the center of the frame, and is cooled by being rotated in the through hole by the motor. It has an impeller that generates wind and a support member that supports the frame, and the cooling fan device can be disposed adjacent to the light source by connecting the support member to the holder.
The support member is provided with a through hole for passing cooling air generated by the impeller in a portion where the frame is disposed, and is supported by the support member at the center of the through hole to cool the motor. Part is provided,
The cooling unit is disposed between the motor and the light source so as to face the motor and to have an air flow between the motor and the air flow unit. And an air introduction part that is integrally connected to the part and faces a part of the rotation area of the impeller of the through hole. The projector according to claim 2, wherein a part or all of the air introduction part is inclined toward the impeller side. The projector according to claim 2, wherein the air introduction unit includes an airflow rectification unit that protrudes from a surface on the impeller side and extends in a radial direction of the impeller. A frame with a through hole in the center;
A motor disposed in the center of the through hole of the frame;
An impeller disposed in the through hole and generating cooling air by being rotated in the through hole by the motor;
A support member for supporting the frame;
The support member is provided with a through hole for passing cooling air generated by the impeller in a portion where the frame is disposed, and is supported by the support member at the center of the through hole to cool the motor. Part is provided,
The cooling section is disposed between the motor and the article to be cooled, facing the motor and having an air flow between the motor and the motor, and the air flowing section. And an air introduction portion that is integrally connected to a part of the through hole and that faces a part of the rotation region of the impeller of the through hole,
A part or all of the air introduction part is formed to be inclined toward the impeller side with respect to the air flow part, and includes an airflow rectification part that protrudes from a surface on the impeller side and extends in a radial direction of the impeller. A cooling fan device. The cooling fan device includes a frame,
A motor disposed in the center of a through hole formed in the center of the frame;
An impeller disposed in the through hole and generating cooling air by being rotated in the through hole by the motor;
A support member for supporting the frame;
The support member is provided with a through hole for passing cooling air generated by the impeller in a portion where the frame is disposed, and is supported by the support member at the center of the through hole to cool the motor. Part is provided,
The cooling section is disposed between the motor and the article to be cooled, facing the motor and having an air flow between the motor and the motor, and the air flowing section. A cooling fan device, characterized in that an air introduction portion that is integrally connected to a part of the through hole and that faces a part of a rotation region of the impeller of the through hole is formed. The cooling fan device according to claim 6, wherein a part or all of the air introduction part is inclined toward the impeller side. The cooling fan device according to claim 6, wherein the air introduction unit includes an air flow rectification unit that protrudes from a surface on the impeller side and extends in a radial direction of the impeller.

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