TWI673561B - Mercury lamp cooling system and projector - Google Patents

Abstract

A mercury lamp cooling device includes an inclination detector for detecting the inclination angle of a projector, a controller, a first fan, a second fan, and a wind guide structure. The air guiding structure includes a first air duct, a second air duct, and two air flow switching devices respectively disposed in the first air duct and the second air duct. The controller is electrically connected to the inclination detector, the first fan and the second fan, and two air flow switching devices. The first air duct has a first opening facing the first fan and a second opening and a third opening facing the mercury lamp, and the second air duct has a fourth opening facing the second fan and a fifth opening and sixth facing the mercury lamp. Opening. The controller controls the airflow switching device to pass airflow through at least one of the second opening and the third opening and at least one of the fifth opening and the sixth opening according to the inclination angle.

Description

Mercury lamp cooling device and projector

The invention relates to a mercury lamp cooling device and a projector having a mercury lamp cooling device.

Generally, the projection angle changes the projection angle according to the operation requirements, so the optimal cooling position of the light source will also change accordingly. Taking a mercury lamp as an example, if the cooling direction is fixed relative to the mercury lamp, it is difficult to maintain the cooling effect when the projection angle of the projector is changed.

One aspect of the present disclosure is a cooling device applied to a projector.

According to some embodiments of the present disclosure, the projector has a housing and a mercury lamp. The cooling device includes an inclination detector, a controller, a first fan and a second fan, and an air guiding structure. The inclination detector is arranged in the casing and used to detect the inclination angle of the projector. The controller is electrically connected to the inclination detector. The first fan and the second fan are electrically connected to the controller and configured to form an air flow. The air guiding structure includes a first air duct, a second air duct, and two air flow switching devices. The first air duct has a first opening, a second opening, and a third opening. The first opening faces the first fan, and the second opening and the third opening face the mercury lamp. The second air duct has a fourth opening, a fifth opening and a sixth opening, the fourth opening faces the second fan, and the fifth opening and the sixth opening face the mercury lamp. The two air flow switching devices are respectively disposed in the first air duct and the second air duct, and are electrically connected to the controller. The controller controls the airflow switching device to pass airflow through at least one of the second opening and the third opening and at least one of the fifth opening and the sixth opening according to the inclination angle.

In some embodiments of the disclosure, the mercury lamp of the cooling device has a wick, and the long axis of the wick is perpendicular to the direction of the second opening and the third opening of the first air duct, and is perpendicular to the fifth opening of the second air duct. Direction with sixth opening.

In some embodiments of the present disclosure, the wick of the mercury lamp is surrounded by the second opening and the third opening of the first air duct, and the fifth opening and the sixth opening of the second air duct.

In some embodiments of the present disclosure, the second opening and the third opening of the first air duct are opposite to the fifth opening and the sixth opening of the second air duct, respectively.

In some embodiments of the present disclosure, the second and third openings of the first air duct are located on the left and lower sides of the mercury lamp, respectively, and the fifth and sixth openings of the second air duct are located on the right and the right of the mercury lamp, respectively. Upside.

In some embodiments of the present disclosure, the first air duct includes a first extension portion, a second extension portion, and a first communication portion adjacent to the first extension portion and the second extension portion. The second air duct includes a third extension portion, a fourth extension portion, and a second communication portion adjacent to the third extension portion and the fourth extension portion. The first extension portion and the second extension portion have a second opening and a third opening, the third extension portion and the fourth extension portion have a fifth opening and a sixth opening, respectively, and the two air flow switching devices are located at the first communication portion, respectively. And the second communicating portion.

In some embodiments of the present disclosure, the first extension portion and the third extension portion are located on the left and right sides of the mercury lamp, respectively, and the second extension portion and the fourth extension portion are located on the upper and lower sides of the mercury lamp, respectively.

In some embodiments of the present disclosure, each of the two air flow switching devices has a sensor, and the sensor is electrically connected to the controller.

Another technical aspect of this disclosure is a projector.

According to some embodiments of the present disclosure, the projector includes a casing, a mercury lamp, an inclination detector, a controller, a first fan and a second fan, and a wind guide structure. Mercury lamps have a wick. The inclination detector is arranged in the casing and used to detect the inclination angle of the projector. The controller is electrically connected to the inclination detector. The first fan and the second fan are electrically connected to the controller and configured to form an air flow. The air guiding structure includes a first air duct, a second air duct, and two air flow switching devices. The first air duct has a first opening, a second opening, and a third opening. The first opening faces the first fan, and the second opening and the third opening face the mercury lamp. The second air duct has a fourth opening, a fifth opening and a sixth opening, the fourth opening faces the second fan, and the fifth opening and the sixth opening face the mercury lamp. The two air flow switching devices are respectively disposed in the first air duct and the second air duct, and are electrically connected to the controller. The controller controls the airflow switching device to pass airflow through at least one of the second opening and the third opening and at least one of the fifth opening and the sixth opening according to the inclination angle.

In some embodiments of the disclosure, the mercury lamp of the projector has a wick, and the long axis of the wick is perpendicular to the direction of the second opening and the third opening of the first air duct, and perpendicular to the fifth opening of the second air duct. Direction with sixth opening.

In some embodiments of the present disclosure, the wick of the mercury lamp is surrounded by the second opening and the third opening of the first air duct, and the fifth opening and the sixth opening of the second air duct.

In some embodiments of the present disclosure, the second opening and the third opening of the first air duct are opposite to the fifth opening and the sixth opening of the second air duct, respectively.

In some embodiments of the present disclosure, the second and third openings of the first air duct are located on the left and lower sides of the mercury lamp, respectively, and the fifth and sixth openings of the second air duct are located on the right and the right of the mercury lamp, respectively. Upside.

In some embodiments of the present disclosure, the first air duct includes a first extension portion, a second extension portion, and a first communication portion adjacent to the first extension portion and the second extension portion. The second air duct includes a third extension portion, a fourth extension portion, and a second communication portion adjacent to the third extension portion and the fourth extension portion. The first extension portion and the second extension portion have a second opening and a third opening, the third extension portion and the fourth extension portion have a fifth opening and a sixth opening, respectively, and the two air flow switching devices are located at the first communication portion, respectively. And the second communicating portion.

In some embodiments of the present disclosure, the first extension portion and the third extension portion are located on the left and right sides of the mercury lamp, respectively, and the second extension portion and the fourth extension portion are located on the upper and lower sides of the mercury lamp, respectively.

In some embodiments of the present disclosure, each of the two air flow switching devices has a sensor, and the sensor is electrically connected to the controller.

In some embodiments of the present disclosure, when the projector is rotated by an angle and the angle falls in the first interval, the two air flow switching devices are respectively located at the positions where the second extension portion and the fourth extension portion are opened. In the second interval, one of the two air flow switching devices is in a position where the first extension portion and the second extension portion are opened, and the other is in a position where the third extension portion and the fourth extension portion are opened. In three sections, the two air flow switching devices are respectively located at the positions where the first extension section and the third extension section are opened, wherein the first section is greater than 0 degrees and smaller than the second section, and the third section is smaller than 90 degrees and larger than the second section.

In some embodiments of the present disclosure, when the angle falls in the first interval, the airflow formed by the first fan and the second fan sequentially passes through the second extension, the mercury lamp, and the fourth extension, or the airflow sequentially passes through the first Four extensions, a mercury lamp, and a second extension.

In some embodiments of the present disclosure, when the angle falls in the second interval, the airflow formed by the first fan and the second fan sequentially passes through the first air duct, the mercury lamp, and the second air duct, or the airflow passes sequentially through the first air duct. Second air duct, mercury lamp and first air duct.

In some embodiments of the present disclosure, when the angle falls in the third interval, the airflow formed by the first fan and the second fan sequentially passes through the first extension, the mercury lamp, and the third extension, or the airflow passes through the first in sequence. Three extensions, a mercury lamp, and a first extension.

In the above-mentioned embodiment of the present disclosure, since the projection angle changes the projection angle according to operation requirements, the optimal cooling position of the mercury lamp will also change accordingly. Therefore, by controlling the two air flow switching devices according to the inclination angle measured by the inclination detector, the cooling device can cool the mercury lamp in different directions. In this way, the cooling effect of the mercury lamp can be prevented from being reduced due to different tilt angles when the projector is used, and the temperature of the mercury lamp can be maintained within a reasonable range to extend the life of the mercury lamp.

In the following, a plurality of embodiments of the present invention will be disclosed graphically. For the sake of clarity, many practical details will be described in the following description. It should be understood, however, that these practical details should not be used to limit the invention. That is, in some embodiments of the present invention, these practical details are unnecessary. In addition, in order to simplify the drawings, some conventional structures and components will be shown in the drawings in a simple and schematic manner. And for the sake of clarity, the thickness of the layers and regions in the drawings may be exaggerated, and in the description of the drawings, the same element symbols represent the same elements.

FIG. 1 is a side view of a projector 10 having a cooling device 100 according to an embodiment of the present invention. The projector 10 includes a casing 12, a mercury lamp 14, a lens 16, and a cooling device 100. The mercury lamp 14 has a wick 18. In this embodiment, the mercury lamp 14 is a high-pressure mercury lamp. In this embodiment, the lens 16 is located on the left side of the projector 10 and is arranged to project horizontally to the left (direction A0).

The cooling device 100 includes an inclination detector 110, a controller 120, a first fan 130a, a second fan 130b, and an air guiding structure 140. The inclination detector 110 is disposed on the casing 12 to detect the inclination angle of the projector 10. The controller 120 is electrically connected to the inclination detector 110. The first fan 130a and the second fan 130b are electrically connected to the controller 120 and are configured to form an air flow. The air guiding structure 140 includes a first air duct 150, a second air duct 160, a first air flow switching device 170, and a second air flow switching device 180.

The first air duct 150 of the air guiding structure 140 has a first opening 151, a second opening 152 and a third opening 153. The first opening 151 faces the first fan 130 a, and the second opening 152 and the third opening 153 face the mercury lamp 14. The second air duct 160 of the air guiding structure 140 has a fourth opening 161, a fifth opening 162, and a sixth opening 163. The fourth opening 161 faces the second fan 130b, and the fifth opening 162 and the sixth opening 163 face the mercury lamp 14.

The first air flow switching device 170 is disposed in the first air duct 150 and is electrically connected to the controller 120, and the second air flow switching device 180 is disposed in the second air duct 160 and is electrically connected to the controller 120. The controller 120 controls the first airflow switching device 170 to allow the airflow to pass through the second opening 152 of the first air duct 150 or the third opening 153 or simultaneously through the second airflow according to the inclination angle measured by the inclination detector 110. The opening 152 and the third opening 153. The controller 120 controls the second airflow switching device 180 to allow the airflow to pass through the fifth opening 162 of the second air duct 160, or through the sixth opening 163, or through the fifth simultaneously according to the inclination angle measured by the inclination detector 110. The opening 162 and the sixth opening 163.

Generally, in the process of using the mercury lamp 14 as the light source, the mercury lamp 14 should be maintained within a suitable temperature range (such as the data provided by the mercury lamp 14 manufacturer after testing) to ensure that it can reach Reasonable use of mercury lamp 14 hours. It can be seen that, because the projector 10 changes the projection angle according to the operation requirements, the optimal cooling position of the mercury lamp 14 also changes accordingly. Therefore, by the controller 120 controlling the first air flow switching device 170 and the second air flow switching device 180 according to the inclination angle measured by the inclination detector 110, the cooling device 100 can cool the mercury lamp 14 in different directions. In this way, the cooling effect of the mercury lamp 14 can be prevented from being reduced due to different tilting angles of the projector 10, and the temperature of the mercury lamp 14 can be maintained within a reasonable range, thereby extending the service life of the mercury lamp 14.

Fig. 2 is a top view of the projector 10 of Fig. 1. In this embodiment, the lens 16 of the projector 10 is located in front of the projector 10. As shown in the direction A0, the projector 10 is arranged to project forward. The wick 18 of the mercury lamp 14 has a long axis R. It should be understood that the long axis R is also a rotation axis when the projector 10 rotates. In other words, when the projector 10 is rotated about the long axis R as the axis, the mercury lamp 14 is substantially rotated along the wick 18. Therefore, the projection direction indicated by the direction A will also follow the swing, and the change in the angle of the direction A0 is the tilt angle of the aforementioned projector 10.

For example, in the embodiment shown in FIG. 2, the projector 10 may be placed horizontally on a table or hung horizontally on the ceiling, and the image may be projected on a wall or a projection screen (as indicated by the direction A0). Projection direction). When the user wants to adjust the projection angle, the projector 10 is rotated by an angle with the long axis R as an axis to adjust the position of the image on the wall or the projection screen.

Generally, the heat generated when the mercury lamp 14 emits light is accumulated above it. In order to maintain the mercury lamp 14 in a proper temperature range, generating airflow in a direction perpendicular to the wick 18 (such as direction D in FIG. 1) has a better cooling effect for the mercury lamp 14, thereby extending the life of the mercury lamp 14. .

FIG. 3 is a partial perspective view of the mercury lamp 14 of FIG. 2. According to the above, when the projector 10 (see FIG. 2) is rotated around the long axis R of the wick 18, the heat generated by the mercury lamp 14 is accumulated at different positions of the mercury lamp 14 itself. That is, if the cooling direction is fixed with respect to the mercury lamp 14, the cooling effect cannot be maintained when the projector 10 is tilted at different angles.

For example, when the mercury lamp 14 in FIG. 3 rotates around the long axis R of the wick 18, the second opening 152, the third opening 153, the fifth opening 162 (see FIG. 1), and the sixth It is possible that the openings 163 are in a relatively vertical direction D after the rotation. In other words, the heat generated by the mercury lamp 14 is accumulated in different positions of the mercury lamp 14 in different use states. Therefore, in the cooling device 100 of the present disclosure, the second opening 152, the third opening 153 of the first air duct 150, and the fifth opening 162, the sixth opening 163 of the second air duct 160 are the wick 18 provided to surround the mercury lamp 14. . Specifically, the second opening 152 and the third opening 153 of the first air duct 150 have an opening direction D1 and an opening direction D2, respectively, and the fourth opening 162 and the fourth opening 163 of the second air duct 160 have an opening direction D3 and The opening direction D4, and the opening directions D1, D2, D3, and D4 are all perpendicular to the long axis R of the wick 18. In this way, after the inclination detector 110 measures the inclination angle of the projector 10, the controller 120 may control the first airflow switching device 170 and the second airflow switching device 180 to adjust the cooling direction relative to the mercury lamp according to the inclination angle. 14Vertical direction D.

Please return to Figure 1. In the cooling device 100 of the present disclosure, the second opening 152 of the first air duct 150 is opposite to the fifth opening 162 of the second air duct 160, and the third opening 153 of the first air duct 150 and the first opening 153 of the second air duct 160 are opposite. The six openings 163 are opposed. In addition, the second opening 152, the third opening 153, the fifth opening 162, and the sixth opening 163 are located on four different sides around the mercury lamp 14, respectively. Specifically, the relative positions of the second opening 152, the third opening 153, the fifth opening 162, and the sixth opening 163 and the mercury lamp 14 are fixed. As shown in FIG. 1, the second opening 152 and the fifth opening 162 are located at the left and right sides of the mercury lamp 14, and the third opening 153 and the sixth opening 163 are located at the horizontal position of the projector 10. The mercury lamp 14 has a lower side and an upper side. That is, when the projector 10 rotates around the long axis R of the wick 18, the mercury lamp 14 rotates in synchronization with the second opening 152, the third opening 153, the fifth opening 162, and the sixth opening 163.

In order to make the subsequent embodiments clear, the above-mentioned opening directions D1, D2, D3, and D4 are used to define a direction relative to a space in which the projector 10 is placed, or a direction relative to a user. For example, in the embodiment shown in FIG. 1, since the projector 10 is placed horizontally, the opening direction D1 of the second opening 152 is from the left to the mercury lamp 14, and the opening direction D3 of the fifth opening 162 is from The opening direction D2 of the right side pointing to the mercury lamp 14 and the third opening 153 is directed to the mercury lamp 14 from below, and the opening direction D4 of the sixth opening 163 is pointing to the mercury lamp 14 from above. Here, the upper direction may refer to the direction toward the aforementioned ceiling, and the lower direction may refer to the direction toward the aforementioned floor. In other words, when the projector 10 rotates around the long axis R of the wick 18, the opening directions D1, D2, D3, and D4 may be located at or near any of the upper, lower, left, and right sides, respectively. . In this way, when the projector 10 is rotated to different angles, the openings close to the vertical direction (that is, above and below) may be selected to perform cooling, so as to maintain a better cooling effect of the mercury lamp 14.

The first air duct 150 of the wind guide structure 140 includes a first extension portion 155, a second extension portion 156, and a first communication portion 154 adjacent to the first extension portion 155 and the second extension portion 156. The first extension portion 155 has a second opening 152, the second extension portion 156 has a third opening 153, and the first communication portion 154 has a first opening 151. The second air duct 160 includes a third extension portion 165, a fourth extension portion 166, and a second communication portion 164 adjacent to the third extension portion 165 and the fourth extension portion 166. The third extension portion 165 has a fifth opening 162, the fourth extension portion 166 has a sixth opening 163, and the second communication portion 164 has a fourth opening 161. That is, in this embodiment, the first extension portion 155 is located on the left side of the mercury lamp 14, and the second extension portion 156 is located on the lower side of the mercury lamp 14. The third extension portion 165 is located on the right side of the mercury lamp 14, and the fourth extension portion 166 is located on the side above the mercury lamp 14.

In this embodiment, the first air duct 150 and the second air duct 160 are disposed substantially symmetrically. That is, the lengths of the first extension portion 155 and the second extension portion 156 are substantially the same, and the lengths of the third extension portion 165 and the fourth extension portion 166 are also approximately the same. In this way, the airflow provided by the first fan 130a can evenly pass through the first extension portion 155, the second extension portion 156, or both the first extension portion 155 and the second extension portion 156. Similarly, the airflow provided by the second fan 130b can pass through the third extension portion 165, the fourth extension portion 166, or both the third extension portion 165 and the fourth extension portion 166 uniformly. However, the configuration of the first air duct 150 and the second air duct 160 shown in the figure is merely an example, which is not intended to limit the present invention.

The first air flow switching device 170 is located in the first communication portion 154 of the first air duct 150, and the second air flow switching device 180 is located in the second communication portion 164 of the second air duct 160. The first air flow switching device 170 has a sensor 172, and the second air flow switching device 180 has a sensor 182. The sensor 172 of the first air flow switching device 170 is disposed in the first communication portion 154 of the first air duct 150 and is electrically connected to the controller 120. The sensor 182 of the second air flow switching device 180 is disposed in the second air duct 160. The second communication portion 164 is electrically connected to the controller 120.

In some embodiments, the first airflow switching device 170 and the second airflow switching device 180 may be controlled by power, such as a stepping motor. In some embodiments, the first airflow switching device 170 and the second airflow switching device 180 may be controlled by a magnetic force, such as an electromagnet. Specifically, in some embodiments, the first airflow switching device 170 and the second airflow switching device 180 may pass through structures such as a baffle or a valve to allow airflow to pass through different extensions and openings, respectively. The sensors 172 and 182 can sense whether the above-mentioned structure performs the switching operation correctly and return this information to the controller 120.

In this way, if the sensor 172 does not sense a signal corresponding to the switching action of the first airflow switching device 170, or the sensor 182 does not sense a signal corresponding to the switching action of the second airflow switching device 180, The controller 120 may take protective measures to avoid damage to the mercury lamp 14. For example, the controller 120 can automatically stop projection and send a warning signal to remind the user that the cooling device 100 of the projector 10 is abnormal. Therefore, the cooling device 100 of the present disclosure can ensure the operation of the airflow switching device and maintain the mercury lamp 14 in a better cooling condition.

The following describes the manner in which the cooling device 100 performs the cooling of the mercury lamp 14 when the projector 10 rotates at different angles according to the different embodiments shown in FIGS. 4 to 6.

FIG. 4 is a front view when the projector 10 of FIG. 1 is rotated by an angle θ1. As can be seen from the embodiments of FIG. 2 and FIG. 3, the projector 10 rotates with the long axis R of the wick 18 as an axis. Therefore, in this embodiment, the projector 10 is rotated from the state shown in FIG. 1 (that is, the state in which the lens 16 in FIG. 4 faces the horizontal direction A0 and A0 is directed to the left) by rotating the angle θ1 clockwise to make the lens 16 Turn to direction A1. Specifically, the projection direction of the projector 10 can be rotated upward from the horizontal direction, for example, rotated toward the ceiling direction. In this embodiment, the angle θ1 falls within the first interval S1. In some embodiments, the first interval S1 may be between 0 degrees and 30 degrees, but it is not intended to limit the present invention. For example, the embodiment of FIG. 1 may correspond to a state when the angle θ1 is zero degrees, and the embodiment of FIG. 4 may correspond to a state when the angle θ1 is 10 degrees. As shown in FIG. 4, when the projector 10 is rotated by the angle θ1 in the first interval S1, the opening direction D1 and the opening direction D3 are respectively approaching the left side (and the direction indicated by A0) and the right side toward the mercury lamp 14 respectively. , And the opening direction D2 and the opening direction D4 point toward the mercury lamp 14 from directions close to the lower side and close to the upper side, respectively. Therefore, the inclination detector 110 can control the first airflow switching device 170 to open the second extension 156 corresponding to the opening direction D2 near the lower side (that is, to close the corresponding to the opening direction D1 near the left side) according to the inclination angle θ1. The first extension 155), and controls the second airflow switching device 180 to open the fourth extension 166 corresponding to the opening direction D4 near the upper side (that is, to close the third extension 165 corresponding to the opening direction D3 near the right side). The sensors 172 and 182 can respectively detect whether the first airflow switching device 170 and the second airflow switching device 180 correctly perform the switching operation, and return this information to the controller 120.

In this way, the first fan 130a and the second fan 130b may form the airflow F1 passing sequentially through the second extension 156, the mercury lamp 14, and the fourth extension 166, or may form the air passing through the fourth extension 166 and mercury in order. The airflow F2 of the lamp 14 and the second extension 156. Specifically, as shown in FIG. 4, the airflow F1 can be blown by the first fan 130 a toward the first communication portion 154, and the airflow F1 passes through the second extension portion 156, the mercury lamp 14, and the fourth extension portion 166 in order, and is then transmitted by the first The second fan 130b blows out, or the second fan 130b can blow the airflow F2 to the second communication portion 164, and the airflow F2 passes through the fourth extension portion 166, the mercury lamp 14, and the second extension portion 156 in order and is blown out by the first fan 130a. In addition, in some embodiments, when the first fan 130a blows the airflow F1 toward the first communication portion 154, the second fan 130b can perform air extraction to form a stronger and smoother airflow F1. Alternatively, when the airflow F2 is blown by the second fan 130b toward the second communication portion 164, the first fan 130a may perform air extraction to form a stronger and smoother airflow F2.

FIG. 5 is a front view when the projector 10 of FIG. 1 is rotated by an angle θ2. In this embodiment, the projector 10 is rotated clockwise by an angle θ2 from the state shown in FIG. 1 (that is, the state in which the lens 16 in FIG. 4 faces the horizontal direction A0 and A0 points to the left), so that the lens 16 is rotated to Direction A2. Specifically, the projection direction of the projector 10 can be rotated upward from the horizontal direction, for example, rotated toward the ceiling direction.

In this embodiment, the angle θ2 falls within the second interval S2. In some embodiments, the second interval S2 may be between 30 degrees and 60 degrees, but it is not intended to limit the present invention. As shown in FIG. 5, when the projector 10 is rotated by the angle θ2 in the second interval S2, the opening direction D1 and the opening direction D3 point toward the mercury lamp 14 from directions close to the upper left side and near the lower right side, respectively, and the opening direction D2 and the opening direction D4 point toward the mercury lamp 14 from directions close to the lower left side and close to the upper right side, respectively. Therefore, the inclination detector 110 can control the first airflow switching device 170 to simultaneously open the first extension 155 corresponding to the opening direction D1 near the upper side and the second corresponding to the opening direction D2 near the lower side according to the inclination angle θ2. The extension portion 156 controls the second airflow switching device 180 to simultaneously open the fourth extension portion 166 corresponding to the opening direction D4 near the upper side and the third extension portion 165 corresponding to the opening direction D3 near the lower side. The sensors 172 and 182 can individually detect whether the first airflow switching device 170 and the second airflow switching device 180 correctly perform the switching operation, and individually return the information to the controller 120.

In this way, the first fan 130a and the second fan 130b may form the airflow F3 passing through the first air duct 150, the mercury lamp 14, and the second air duct 160 in sequence, or may form the airflow F3 passing sequentially through the second air duct 160, mercury The airflow F4 of the lamp 14 and the first air duct 150. Specifically, the first fan 130a can blow the airflow F3 to the first communication portion 154, and the airflow F3 passes through the first air duct 150, the mercury lamp 14, and the second air duct 160 in order and is blown out by the second fan 130b. The second fan 130b blows the airflow F4 toward the second communication portion 164, and the airflow F4 passes through the second air duct 160, the mercury lamp 14, and the first air duct 150 in this order and is blown out by the first fan 130a. In addition, in some embodiments, when the first fan 130a blows the airflow F3 toward the first communication portion 154, the second fan 130b can perform air extraction to form a stronger and smoother airflow F3. Alternatively, when the airflow F4 is blown from the second fan 130b to the second communication portion 164, the first fan 130a may perform air extraction to form a stronger and smoother airflow F4.

FIG. 6 is a front view when the projector 10 of FIG. 1 is rotated by an angle θ3. In this embodiment, the projector 10 is rotated clockwise by an angle θ3 from the state shown in FIG. 1 (that is, the state in which the lens 16 in FIG. 4 is facing the horizontal direction A0 and A0 is pointing to the left) to Direction A3. Specifically, the projection direction of the projector 10 can be rotated upward from the horizontal direction, for example, rotated toward the ceiling direction.

In this embodiment, the angle θ3 falls in the third interval S3. In some embodiments, the third interval S3 may be between 60 degrees and 90 degrees, but it is not intended to limit the present invention. As shown in FIG. 6, when the projector 10 is rotated by the angle θ3 in the third section S3, the opening direction D1 and the opening direction D3 point toward the mercury lamp 14 from directions close to the upper side and close to the lower side, respectively, and the sides 102 and The side edges 104 point toward the mercury lamp 14 from directions close to the left and close to the right, respectively. Therefore, the inclination detector 110 can control the first airflow switching device 170 to open the first extension 155 corresponding to the opening direction D1 on the upper side (that is, the opening direction D2 on the left side is closed according to the inclination angle θ3. Corresponding second extension 156), and controls the second airflow switching device 180 to open the third extension 165 corresponding to the opening direction D3 located on the lower side (that is, the fourth corresponding to the opening direction D4 closed on the right side) Extension 166). The sensors 172 and 182 can respectively detect whether the first airflow switching device 170 and the second airflow switching device 180 correctly perform the switching operation, and return this information to the controller 120.

In this way, the first fan 130a and the second fan 130b may form the airflow F5 passing through the first extension 155, the mercury lamp 14, and the third extension 165 in sequence, or may form the air passing through the third extension 165 and mercury in order. The airflow F6 of the lamp 14 and the first extension 155. Specifically, the first fan 130a can blow the airflow F5 to the first communication portion 154, and the airflow F5 passes through the first extension portion 155, the mercury lamp 14, and the third extension portion 165 in sequence and is blown out by the second fan 130b, or The second fan 130b blows the airflow F6 to the second communication portion 164, and the airflow F6 passes through the third extension portion 165, the mercury lamp 14, and the first extension portion 155 in order and is blown out by the first fan 130a. In addition, in some embodiments, when the first fan 130a blows the airflow F5 toward the first communication portion 154, the second fan 130b can perform air extraction to form a stronger and smoother airflow F5. Alternatively, when the airflow F6 is blown by the second fan 130b toward the second communication portion 164, the first fan 130a may perform air extraction to form a stronger and smoother airflow F6.

According to the embodiments shown in FIGS. 4 to 6, the controller 120 controls the first airflow switching device 170 and the second airflow switching device 180 according to the inclination angle measured by the inclination detector 110. The combination of the extension portion 155, the second extension portion 156, the third extension portion 165, and the fourth extension portion 166 can ensure that the cooling device 100 cools the mercury lamp 14 in the vertical direction. In this way, the cooling effect of the mercury lamp 14 can be prevented from being reduced due to different tilt angles of the projector 10, and the temperature of the mercury lamp 14 can be maintained within a reasonable range, so as to extend the service life of the mercury lamp 14 and the projector 10.

Although the present invention has been disclosed as above by way of example, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and retouches without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be determined by the scope of the attached patent application.

10‧‧‧ Projector

12‧‧‧shell

14‧‧‧ Mercury lamp

16‧‧‧ lens

18‧‧‧ Wick

100‧‧‧cooling device

110‧‧‧Inclination detector

120‧‧‧ Controller

130a‧‧‧first fan

130b‧‧‧Second Fan

140‧‧‧ wind guide structure

150‧‧‧first wind tunnel

151‧‧‧First opening

152‧‧‧Second opening

153‧‧‧ third opening

154‧‧‧First connecting department

155‧‧‧First extension

156‧‧‧second extension

160‧‧‧second air duct

161‧‧‧Fourth opening

162‧‧‧Fifth opening

163‧‧‧ sixth opening

164‧‧‧Second connection

165‧‧‧Third Extension

166‧‧‧Fourth Extension

170‧‧‧The first air flow switching device

172‧‧‧Sensor

180‧‧‧Second air flow switching device

182‧‧‧Sensor

R‧‧‧long axis

θ1, θ2, θ3‧‧‧ angle

A0, A1, A2, A3‧‧‧ direction

D‧‧‧ direction

D1, D2, D3, D4‧‧‧ opening direction

S1‧‧‧First Interval

S2‧‧‧Second Section

S3‧‧‧ third interval

FIG. 1 is a side view of a projector having a cooling device according to an embodiment of the present invention. Figure 2 is a top view of the projector of Figure 1. FIG. 3 is a partial perspective view of the mercury lamp of FIG. 2. Figure 4 is a front view when the projector of Figure 1 is rotated by an angle. Figure 5 is a front view when the projector of Figure 1 is rotated by an angle. Figure 6 is a front view when the projector of Figure 1 is rotated by an angle.

Claims (18)

A cooling device is applied to a projector. The projector has a casing and a mercury lamp. The cooling device includes: an inclination detector disposed in the casing to detect an inclination angle of the projector. A controller electrically connected to the inclination detector; a first fan and a second fan electrically connected to the controller and arranged to form an airflow; and a wind-conducting structure including: a first air duct Having a first opening, a first extension, a second extension, and a first communication portion adjacent to the first extension and the second extension, the first extension and the second extension Do not have a second opening and a third opening, the first opening is facing the first fan, the second opening and the third opening are facing the mercury lamp; a second air duct having a fourth opening, a first opening Three extensions, a fourth extension, and a second communication portion adjacent to the third extension and the fourth extension. The third extension and the fourth extension have a fifth opening and a sixth, respectively. Opening, the fourth opening facing the second fan, the fifth opening and The sixth opening faces the mercury lamp; and two airflow switching devices are respectively disposed in the first communication portion and the second communication portion and are electrically connected to the controller, wherein the controller controls the airflows according to the inclination angle Switching device The airflow passes through at least one of the second opening and the third opening and at least one of the fifth opening and the sixth opening. The cooling device according to claim 1, wherein the mercury lamp has a wick, and a long axis of the wick is perpendicular to the direction of the second opening and the third opening of the first air duct, and is perpendicular to the second air duct. Directions of the fifth opening and the sixth opening. The cooling device according to claim 2, wherein the wick is surrounded by the second opening and the third opening of the first air duct, and the fifth opening and the sixth opening of the second air duct. The cooling device according to claim 1, wherein the second opening and the third opening of the first air duct are respectively opposite to the fifth opening and the sixth opening of the second air duct. The cooling device according to claim 1, wherein the second opening and the third opening are located on the left and lower sides of the mercury lamp, respectively, and the fifth opening and the sixth opening are located on the right and upper sides of the mercury lamp, respectively. The cooling device according to claim 1, wherein the first extension portion and the third extension portion are located on the left and right sides of the mercury lamp, and the fourth extension portion and the second extension portion are located above and below the mercury lamp, respectively. On both sides. The cooling device according to claim 1, wherein each of the two air flow switching devices has a sensor, and the sensor is electrically connected to the controller. A projector includes: a casing; a mercury lamp having a wick; an inclination detector disposed in the casing to detect an inclination angle of the projector; and a controller electrically connected to the An inclination detector; a first fan and a second fan, which are electrically connected to the controller and arranged to form an airflow; and a wind-conducting structure including: a first air duct having a first opening, a first An extension portion, a second extension portion, and a first communication portion adjacent to the first extension portion and the second extension portion. The first extension portion and the second extension portion have a second opening and a first portion, respectively. Three openings, the first opening facing the first fan, the second opening and the third opening facing the mercury lamp; a second air duct having a fourth opening, a third extension, and a fourth extension And a second communication portion adjacent to the third extension portion and the fourth extension portion, the third extension portion and the fourth extension portion have a fifth opening and a sixth opening, respectively, Four openings face the second fan, the fifth opening and the sixth opening face the mercury lamp; and two air flow switching devices are respectively disposed in the first communication portion and the second communication portion and are electrically connected to the control. The controller controls the airflow switching devices to pass the airflow through at least one of the second opening and the third opening and at least one of the fifth opening and the sixth opening according to the tilt angle. The projector according to claim 8, wherein the mercury lamp has a wick, and a long axis of the wick is perpendicular to the direction of the second opening and the third opening of the first air duct, and is perpendicular to the second air duct. Directions of the fifth opening and the sixth opening. The projector according to claim 9, wherein the wick is surrounded by the second opening and the third opening of the first air duct, and the fifth opening and the sixth opening of the second air duct. The projector according to claim 8, wherein the second opening and the third opening of the first air duct are respectively opposite to the fifth opening and the sixth opening of the second air duct. The projector according to claim 8, wherein the second opening and the third opening are located on the left and lower sides of the mercury lamp, respectively, and the fifth opening and the sixth opening are located on the right and upper sides of the mercury lamp, respectively. The projector according to claim 8, wherein the first extension portion and the third extension portion are located on the left and right sides of the mercury lamp, and the fourth extension portion and the second extension portion are located above and below the mercury lamp, respectively. On both sides. The projector according to claim 8, wherein each of the two airflow switching devices has a sensor, and the sensor is electrically connected to the controller. The projector according to claim 8, wherein when the projector is rotated by an angle and the angle falls within a first interval, the two air flow switching devices are respectively located to open the second extension portion and the fourth extension portion. Position, when the angle falls in a second interval, one of the two air flow switching devices is in a position to open the first extension and the second extension, and the other is to open the third extension and For the position of the fourth extension, when the angle falls in a third interval, the two air flow switching devices are respectively located at the positions where the first extension and the third extension are opened. The first interval is less than 90 degrees and Greater than the second interval, the third interval is greater than 0 degrees and smaller than the second interval. The projector according to claim 15, wherein when the angle falls in the first interval, the airflow formed by the first fan and the second fan sequentially passes through the second extension, the mercury lamp, and the first fan. Four extensions, or the airflow sequentially passes through the fourth extension, the mercury lamp, and the second extension. The projector according to claim 15, wherein when the angle falls in the second interval, the airflow formed by the first fan and the second fan sequentially passes through the first air duct, the mercury lamp, and the first fan. Two air ducts, or the airflow sequentially passes through the second air duct, the mercury lamp, and the first air duct. The projector according to claim 15, wherein when the angle falls in the third interval, the airflow formed by the first fan and the second fan sequentially passes through the first extension, the mercury lamp, and the first fan. Three extensions, or the airflow sequentially passes through the third extension, the mercury lamp, and the first extension.