JP4186939B2 - Projector cooling system - Google Patents

Description

  The present invention relates to a projector cooling apparatus having a fan for blowing cooling air.

  In recent years, high brightness has been promoted in projectors to brighten the projection screen. In addition, with the widespread use of personal computers, electronic presentations are often used, and there is a strong demand for miniaturization and weight reduction that is excellent in portability as an image output device such as a notebook personal computer.

  For this reason, the output of the light source lamp increases as the brightness increases, and the cooling performance of the light source lamp and the optical device and the exhaust performance of the heat generated in the housing are important issues.

 The projector is provided with a cooling fan for cooling the light source lamp and the optical device in the projector and an exhaust cooling fan for discharging the heat accumulated in the housing to the outside.

 FIG. 3 is a plan view showing a configuration of a conventional projector. The projector includes an optical block unit 2 housed in a hollow casing 1 having a rectangular parallelepiped shape, a power source unit 3, an electric circuit unit 4, a cooling unit 5 for cooling these parts, and a casing. It consists of the exhaust part 6 which discharges the accumulated heat to the outside.

  The optical block unit includes a light source lamp unit 7, a spectroscopic unit 8 that splits the lamp light into RGB, a video display unit 9 composed of RGB liquid crystal panels to display video, a synthesis unit 10 that synthesizes RGB images, The projection lens unit 11 is configured to enlarge and project an image.

 Fan motors 13a and 13b are disposed in the cooling unit 5 to guide the cooling air through the duct 12 to the synthesis unit 10 and the power supply unit 3, and the light source lamp unit 7 having a high calorific value is disposed in the exhaust unit 6. The fan motor 13 c is disposed near the light source lamp unit 7 and the wall surface of the housing 1 in order to quickly discharge the heat of the outside to the outside of the housing.

 Here, the fan motor 13a is a sirocco fan, and the fan motors 13b and 13c are axial fans.

  4 is a block diagram of a sirocco fan, and FIG. 5 is a block diagram of an axial fan. As shown in FIGS. 4 and 5, motor units 15a, 15b, and 15c for rotating the blades 14a, 14b, and 14c are stored in the center portions of the blades 14a, 14b, and 14c in the fan motors 13a, 13b, and 13c, respectively. Yes.

 The motor configuration is the same for sirocco fans and axial fans. The fan motors 13a, 13b, and 13c are electrically connected to the electric circuit unit 4 via the lead wires 16a, 16b, and 16c. It functions to cool the power supply unit 3 and to discharge heat to the outside of the housing.

 Although the rotational speed of the blade 14 is increased as a means for increasing the cooling efficiency and the exhaust heat efficiency, the wind noise generated from the blade 14 is increased, so the rotational speed of the blade 14 cannot be simply increased.

 For this reason, in order to solve these problems, a space is provided in the periphery of the fan motor 13 to reduce the ventilation resistance applied to the fan motor 13, to form an air guide path for efficiently guiding the cooling air, or to the fan motor. Although the size of 13 can be increased and the generated wind noise can be reduced, there arises a problem that the size of the housing is increased.

Further, an exhaust cooling fan is generally provided in the vicinity of the light source lamp unit 7 having a large calorific value, and the fan motor 13 has a motor unit 15 mainly composed of an electronic circuit or the like for rotating itself. Therefore, the reliability for heat is low.
JP 2003-98600 A

  The problem to be solved is to provide a fan motor that has improved cooling efficiency and waste heat efficiency without increasing noise and the size of the casing, and has further improved heat reliability.

According to a first aspect of the present invention comprises a motor for driving the blade and the blade, the motor is separated from the blade, the shaft fixed to the center of gravity of the blade motor in a flexible wire The projector has a connected cooling fan, and the motor is disposed in an opening through which the cooling air from the cooling fan passes. The fan cools the motor for rotating the blade of the cooling fan itself .

The invention according to claim 2 is the projector cooling device according to claim 1 , wherein the shaft and the motor wire are respectively connected at the center of gravity, and the rotation of the motor is efficiently transmitted, It has the effect of rotating gently.

The invention according to claim 3, which wire has a projector cooling system according to claim 1, characterized in that it is formed is covered with a hollow tube, wire in place It has the effect of being fixed.

The invention described in claim 4 is the projector cooling device according to claim 1, wherein the motor is disposed at a location lower than the temperature of the blade, and the reliability of the motor against the heat is high. Has a high effect .

 As described above, the fan motor in the projector cooling device according to the present invention does not require a space for storing the motor unit in the center, and thus has an advantage that the area of the blade can be increased and the air volume can be increased. In addition, by connecting the separated motor part to the blade with a wire, the rotation operation of the separated motor can be transmitted to the blade, and the connected wire is covered with a hollow tube, and then the tube is fixed, and the wire becomes a motor It is possible to prevent movement from a predetermined position by the rotation of. For this reason, since the motor unit can be installed separately from the light source lamp unit which is a heat source, an excellent effect is obtained in that reliability is not impaired even if a thermal load is applied to the motor unit.

 Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 2 and FIG. 6.

(Embodiment 1)
FIG. 1 is a plan view showing the configuration of the projector of the present invention. Although the basic configuration of the projector according to the present invention is the same as the conventional one, the fan motors 13a, 13b, and 13c have external motor units 17a, 17b, and 17c for rotating the blades 14a, 14b, and 14c, respectively. , 13b and 13c are arranged at positions away from the blades 14a, 14b and 14c, and the external motor unit and the blades 14a, 14b and 14c are connected to the wires 18a and 18b in order to transmit the rotation of the external motor units 17a, 17b and 17c to the blades 14a, 14b and 14c. , 18c. The wires 18a, 18b, and 18c are covered with tubes 19a, 19b, and 19c so that the wires 18a, 18b, and 19c are rotated at predetermined positions even when the external motor rotates. The tubes 19a, 19b, and 19c are fixed inside the casing. Yes.

 As the tubes 19a, 19b, and 19c, for example, a Tygon tube having excellent wear resistance and flexibility can be used, and the wear of the tube generated by friction with the tube can be reduced by rotating the wire.

 The fan motors 13a, 13b, and 13c are electrically connected to the electric circuit unit 4 via the lead wires 16a, 16b, and 16c, and a current is passed through the external motor units 17a, 17b, and 17c, whereby the wires 18a, 18b, 18c rotates, and the blades 14a, 14b, 14c rotate in synchronization with the rotation of the wires 18a, 18b, 18c, and the cooling of the synthesizing unit 10 and the power supply unit 3 and the function of discharging heat to the outside of the casing are performed.

  FIG. 6 is a sectional view of a fan motor used in the configuration of a conventional projector. Here, the cross section of the axial fan is shown, but the configuration of the motor part is the same as that of the sirocco fan. In FIG. 6, 20 is a shaft, 21 is a bearing, 22 is a magnet, 23 is a stator, and 24 is a circuit board.

 FIG. 2 is a cross-sectional view of the fan motor of the present invention. In comparison with FIG. 6, the magnet 22, the stator 23, and the circuit board 24 do not exist, and the shaft 20 and the external motor unit 17 have their respective centers of gravity by the wires 18 in order to transmit the rotation efficiently and quietly to the blade 14. They are connected so as to coincide with each other, and transmit the rotation operation of the external motor unit 17.

 As described above, according to the present embodiment, since the magnet 22, the stator 23, and the circuit board 24 do not exist inside the blade, it is possible to secure a large area of the blade 14 with the same outer dimensions, and the performance of the fan motor. Can be increased.

 Moreover, since it is connected by the flexible wire 18, the external motor 17 can be arrange | positioned in arbitrary positions, and does not receive the restrictions on a design.

 The shaft 11, the external motor 17 and the wire 18 are connected so that the center of gravity of the cross section is the same at the joint, and the wire 18 and the shaft rotate without being eccentric with respect to the rotation axis of the external motor 17. Therefore, it is possible to operate silently.

 Therefore, a space is provided in the periphery of the fan motor 13 to reduce the ventilation resistance applied to the fan motor 13, to form an air guide path in order to efficiently guide the cooling air, or to increase the size of the fan motor 13. It can be reduced that the wind noise is reduced, and the problem that the size of the housing is increased can be reduced.

 Further, since there is no heat-sensitive circuit board 24, when used in the vicinity of the light source lamp unit 7 like the fan motor 13, it is in the vicinity of the light source lamp unit 7 located at a lower temperature than the blade as shown in FIG. The reliability with respect to heat can be improved by installing the external motor 17 at a position where it does not exist. Furthermore, if the external motor 17 is disposed in the opening through which the cool air of the fan motor 13 passes, there is an effect of cooling the external motor 17 itself and preventing a failure of the motor.

 Although the wire 18 is flexible, a gear may be used to connect the shaft 20 and the external motor.

 In FIG. 2, the wire 18 さ ら に is further connected to the other rotating shaft of the external motor unit 17, and the two fan motors are rotated by one external motor by connecting to the shaft 20 of the other fan motor 13. Can do. Needless to say, if the wire 18 can be connected to the other end of the shaft 20 of the fan motor 13, the rotational motion can be transmitted to another fan motor.

  The projector cooling device according to the present invention does not require a space for storing the motor unit in the center of the fan motor, so that the blade area can be increased and the air volume can be increased, and the motor unit is a heat source. Since it can be installed separately from the light source lamp unit, it has an advantage that reliability is not impaired even if a thermal load is applied to the motor unit, and is useful as a cooling device for a projector having a fan that blows cooling air.

The top view which shows the structure of the projector in embodiment of this invention Sectional drawing of the axial-flow fan in embodiment of this invention Plan view showing the configuration of a conventional projector External view of conventional sirocco fan External view of conventional axial fan Cross-sectional view of an axial fan in a conventional embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 Optical block 3 Power supply part 4 Electric circuit part 5 Cooling part 6 Exhaust part 7 Light source lamp part 8 Spectrometer part 9 Image | video display part 10 Synthesis | combination part 11 Projection lens part 12 Duct 13 Fan motor 14 Blade 15 Motor part 16 Lead wire 17 External motor part 18 Wire 19 Tube 20 Shaft 21 Bearing 22 Magnet 23 Stator 24 Circuit board

Claims (4)

Comprising a motor for driving the blade and the blade, the motor is separated from the blade, a cooling fan, wherein a shaft fixed to the center of gravity of the blade motor is connected by a flexible wire, the motor A projector cooling apparatus, which is disposed in an opening through which cool air from the cooling fan passes. The projector cooling device according to claim 1 , wherein the shaft, the motor, and the wire are connected so that the positions of the center of gravity of the cross section are the same at the joint. The projector cooling device according to claim 1 , wherein the wire is formed so as to be covered with a hollow tube. The projector cooling device according to claim 1, wherein the motor is disposed at a position lower than a temperature of the blade.

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