JP2006309015A - Electrical apparatus and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrical apparatus capable of changing an air sucking/discharging direction of sucking/discharging air to/from the housing of the electrical apparatus. <P>SOLUTION: The electrical apparatus includes first to fourth fans 21, 22, 23 and 24 separately arranged in first to fourth ventilation parts 11, 12, 13 and 14 formed in the front, rear and both side faces of the nearly rectangular parallelepiped housing 1. By rotating the first to fourth fans 21, 22, 23 and 24 by a motor, the heat generated in a light source 6 and an optical modulation element 7 installed in the housing 1 are radiated outside the housing 1, the rotating directions of the first to fourth fans 21, 22, 23 and 24 are changed by a control part 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric device and a projector that are configured such that the inside of a casing can be cooled by air by disposing a fan in a ventilation portion of the casing.

In a conventional projector, ventilation portions are formed on the front side and the rear side of a substantially rectangular parallelepiped housing, and an intake fan and an exhaust fan are arranged in the ventilation portions, respectively. The fan rotates in a certain direction, sucks air into the housing from the front-side vent, and exhausts it from the rear-side vent, thereby radiating heat generated in the projection arc tube to the outside of the housing.
Japanese Patent Laid-Open No. 10-90794

  However, the conventional projector has a problem that the direction of intake and exhaust air is constant because the direction of rotation of the fan is constant. If the intake / exhaust direction is constant, the projector user on the back side of the casing may receive the hot air exhausted from the casing and feel uncomfortable, but unless it moves to the side of the projector, Exhausted hot air cannot be avoided.

  In addition, if the ventilation part is blocked by an object placed on the front or back side of the housing, the arc tube cannot be cooled effectively, so the control circuit of the liquid crystal panel may malfunction due to abnormal temperature. There is a problem that a part of the housing may be thermally deformed by the heat of the arc tube.

  The above-mentioned problem also has an electric device such as a copying machine or a facsimile having a heat generating load.

  The present invention has been made in view of such circumstances, and by configuring the rotation direction of the fan so that it can be switched between forward and reverse, it is possible to change the intake and exhaust directions without changing the posture of the arranged electrical equipment. An object is to provide an electric device and a projector that can be changed.

  In addition, a configuration is provided that includes a plurality of ventilation units and fans, and a detection unit that detects objects facing each other outside the ventilation units, and when the detection unit detects an object, notifies that there is an object blocking the ventilation unit. Accordingly, another object of the present invention is to provide an electric apparatus and a projector capable of notifying that the air passage direction has changed from the passage direction when the ventilation portion is not blocked.

  In addition, when three or more ventilation parts and fans are provided, and an object faces each of the ventilation parts, the rotation direction of the fans so that one fan sucks into the casing and the other fans exhaust out of the casing By providing a configuration that controls the air, it is possible to provide an electric device and a projector that can maintain a state in which air passes through the housing even when any of the ventilation portions is blocked by an object. For other purposes.

  In addition, a detection unit that detects an object opposed to the outside of the ventilation unit is provided, and when the detection unit detects the object, it is configured to notify that there is an object that blocks the ventilation unit, so that the air passage direction However, it is another object of the present invention to provide an electric device and a projector capable of notifying that a change has occurred from the passing direction when the ventilation portion is not blocked.

  Furthermore, when an object facing the ventilation part is detected, by stopping rotation of the fan arranged in the ventilation part facing the object, wasteful energy consumption due to rotation of the fan that cannot be sucked or exhausted is prevented. Another object is to provide an electrical apparatus and a projector that can be prevented.

  Furthermore, based on the detection result of the detection unit, it is determined whether or not the non-opposing airflow part is 1 or less, and if it is determined that it is 1 or less, a warning is issued. Another object is to provide an electric device and a projector that can warn that air cannot pass through the housing.

  Furthermore, based on the detection result of the detection unit, it is determined whether or not the ventilation unit that is not facing the object is 1 or less. If it is determined that the ventilation unit is 1 or less, projection light that displays an image related to a warning is displayed. It is another object of the present invention to provide a projector capable of notifying that air is in a state in which air cannot pass through the housing by an image of projection light by being configured to project.

  Furthermore, when the number of ventilation parts that are not facing each other is 1 or less, a projector capable of preventing the projection part from malfunctioning and being damaged due to an abnormal temperature rise is provided by stopping projection of projection light by the projection part. For other purposes.

  In the electrical device according to the present invention, the rotation direction of the fan is switched between forward and reverse in the electrical device in which air passes through the housing by rotating the fan disposed in the ventilation portion of the housing. Means are provided.

  The electrical apparatus according to the present invention includes a plurality of the ventilation portions, the fans are arranged in the ventilation portions, a detection unit that detects an object facing each ventilation unit on the outside, and the detection unit is an object And a means for notifying that there is an object facing the ventilation part.

  The electrical apparatus according to the present invention has three or more ventilation portions, and the fan is disposed in each of the ventilation portions. The detection means detects an object facing each ventilation portion on the outside, and the detection means Based on the detection result, a specifying unit that specifies a ventilation part that is not facing the object, and two or more ventilation parts that are specified when the specifying unit specifies two or more ventilation parts that are not facing the object And a means for controlling the rotation direction of the fans so that the rotation directions of the fans arranged forward and backward are opposite to each other.

  The electrical device according to the present invention is characterized by comprising means for notifying that there is an object facing the ventilation section when the detection means detects an object.

  The electrical equipment according to the present invention is characterized in that when the detection means detects an object, the electrical equipment includes means for stopping the rotation of the fan disposed in the ventilation portion facing the object.

  The electrical device according to the present invention is based on the detection result of the detection means, and determines whether or not the ventilation part that is not facing the object is 1 or less, and the determination means is 1 or less. And a means for issuing a warning when the determination is made.

  In the projector according to the present invention, in the projector in which the projection unit that projects the projection light for displaying the image is cooled by rotating the fan disposed in the ventilation portion of the housing, the rotation direction of the fan is changed. A means for switching between forward and reverse is provided.

  In the projector according to the present invention, there are a plurality of the ventilation portions, and the fan is disposed in each of the ventilation portions. The detection means detects an object facing the ventilation portion on the outside, and the detection means detects the object. And a means for notifying that there is an object facing the ventilation part when detected.

  In the projector according to the present invention, there are three or more ventilation portions, and the fan is disposed in each of the ventilation portions. The detection means detects an object facing each ventilation portion on the outside, and the detection means detects the detection means. Based on the result, when specifying means for identifying a ventilation portion that is not opposed to an object and two or more ventilation portions that are not opposed to the object, the identification means identifies any two ventilation portions that are identified. And a means for controlling the rotation direction of the fans so that the rotation directions of the arranged fans are opposite to each other.

  The projector according to the present invention includes means for notifying that there is an object facing the ventilation section when the detecting means detects an object.

  The projector according to the present invention is characterized by comprising means for stopping rotation of a fan disposed in a ventilation portion facing the object when the detecting means detects the object.

  The projector according to the present invention determines, based on the detection result of the detection means, whether or not the ventilation part that is not facing the object is 1 or less, and determines that the determination means is 1 or less. And a means for issuing a warning.

  The projector according to the present invention is characterized in that, when the determination unit determines that the number is 1 or less, projection light for displaying an image relating to a warning is projected onto the projection unit.

  The projector according to the present invention is characterized by comprising means for stopping projection of the projection light by the projection means when the judgment means judges that it is 1 or less.

  In the present invention, when the fan is rotating in the forward direction, the air is sucked into the housing, and when the fan is rotating in the reverse direction, the air is exhausted outside the housing. Therefore, when the rotation direction of the fan is switched between forward and reverse, the intake / exhaust direction is switched. When the intake direction is switched, the direction in which air is discharged from the housing changes.

  In the present invention, when the detecting means detects an object facing the outside of the ventilation part, that is, when an object that may block the ventilation part is detected, it is notified that there is an object facing the ventilation part. In addition, since there are a plurality of ventilation sections and fans, the fan intake and exhaust directions are such that air passes through the housing by switching the rotation direction of the fans arranged in the remaining ventilation sections not blocked by the object. Can be switched.

  In the present invention, when the detecting unit detects that there is an object facing any of the three or more fans, the specifying unit specifies a ventilation portion where the object is not facing. Then, the rotation direction of the fan is controlled so that the specified one fan sucks into the casing, and the other specified fan exhausts outside the casing. Therefore, even if any of the ventilation portions is blocked by an object, air passes through the housing.

  In the present invention, when the detecting means detects an object facing the outside of the ventilation part, that is, when an object that may block the ventilation part is detected, it is notified that there is an object facing the ventilation part.

  In the present invention, the rotation of the fan disposed in the ventilation portion facing the object is stopped. Therefore, there is no wasteful energy consumption due to the rotation of the fan that cannot be efficiently sucked and exhausted.

  In the present invention, a warning is issued when the number of ventilation portions that are not facing each other is 1 or less, that is, when there is a possibility that air cannot efficiently pass through the housing.

  In the present invention, when the number of ventilation parts that are not facing each other is 1 or less, that is, when there is a possibility that the air cannot efficiently pass through the casing, the projection unit displays the projection light that displays an image related to the warning. Project. Therefore, the user who is viewing the image displayed with the projection light can immediately recognize the abnormality of intake and exhaust.

  In the present invention, when the number of ventilation parts that are not opposed to the object is 1 or less, projection of projection light by the projection unit stops. Accordingly, the projection unit does not project the projection light in a state where the air does not efficiently pass through the casing and the heat generated by the projection unit is not discharged outside the casing. Therefore, there is no possibility of malfunction or failure of the projection means due to temperature abnormality.

  According to the present invention, it is possible to change the intake and exhaust directions without changing the posture of the arranged electrical device.

  According to this invention, it can alert | report that the passage direction of air changed from the passage direction when the ventilation part is not obstruct | occluded.

  According to the present invention, it is possible to maintain a state where air passes through the housing even when any of the ventilation portions is blocked by an object.

  According to this invention, it can alert | report that the passage direction of air changed from the passage direction when the ventilation part is not obstruct | occluded.

  According to the present invention, it is possible to prevent wasteful energy consumption due to rotation of a fan that cannot be sucked or exhausted.

  According to the present invention, it is possible to warn that the air cannot pass through the housing.

  According to the present invention, it is possible to warn with an image of projection light that air cannot pass through the housing.

  According to the present invention, it is possible to prevent malfunction and damage of the projection unit due to an abnormal temperature rise.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.

(Embodiment 1)
FIG. 1 is a block diagram showing a projector according to Embodiment 1 of the present invention. In the figure, reference numeral 1 denotes a substantially rectangular parallelepiped housing, and a lens 8 is provided on the front side of the housing 1 and on the right side of the substantially vertical central portion. A first ventilation portion 11 composed of a plurality of horizontally long slits is formed on the left side of the lens 1 of the housing 1. Inside the housing 1, a first fan 21 that faces the first ventilation portion 11 and sucks and exhausts air into and out of the housing 1 is disposed.

  An output shaft of a first motor 21a that rotates the first fan 21 is connected to a central portion of the first fan 21. The rotation, stop, and switching of the rotation direction of the first motor 21a are performed in the housing 1. It is controlled by the control unit 4 arranged at appropriate locations. The control unit 4 includes a timer 40 that measures a predetermined time, a RAM (not shown), and the like.

  Further, when viewed from the front, at a substantially central portion in the vertical direction of the housing 1, on the right side of the first ventilation portion 11, a transmitting portion (not shown) that transmits ultrasonic waves toward the outside front of the housing 1, and proceeds to the front. The 1st detection part 31 provided with the receiving part which receives an ultrasonic wave is arrange | positioned. The first detection unit 31 outputs to the control unit 4 a signal s1 that is turned on / off according to the presence / absence of an object facing the first ventilation unit 11.

  On the left side, the back and the right side of the housing 1, a second ventilation part 12, a third ventilation part 13 and a fourth ventilation part 14 similar to the first ventilation part 11 are formed, respectively. Similar second detection unit 32, third detection unit 33, and fourth detection unit 34 are provided. The second detection unit to the fourth detection unit 32, 33, and 34 are signals s2, s3 that are turned on / off according to the presence / absence of an object facing the second ventilation unit to the fourth ventilation unit 12, 13, and 14, respectively. , S4 are output to the control unit 4. In addition, a second fan 22, a third fan 23, and a fourth fan 24 are disposed in the second ventilation portion 12, the third ventilation portion 13, and the fourth ventilation portion 14, and the second fan 22, the third fan 23, and A second motor 22a, a third motor 23a, and a fourth motor 24a are connected to the central portion of the fourth fan 24. The rotation of the second to fourth motors 22a, 23a, 24a is controlled by the control unit 4.

  The control unit 4 controls the rotation direction and stop of rotation of the first to fourth motors 21a, 22a, 23a, and 24a according to the signal si output from the first to fourth detection units 31, 32, 33, and 34. A table for this is stored in the RAM. However, the signal si indicates the signals s1 to s4 output from the first detector to the fourth detectors 31, 32, 33, and 34, the signal si = 1 is an on signal, and the signal si = 0 is off. This signal will be described. For example, the control unit 4 controls the control data (f1, f2, f3, f4) = (1, 0, 0, 2) corresponding to (s1, s2, s3, s4) = (0, 0, 0, 0). Is stored in the RAM. f1 to f4 indicate the control contents of rotation and stop of the first to fourth fans 21, 22, 23, and 24, respectively. Numerical value 1 is rotation in a direction in which intake is possible, and numerical value 2 is exhaustable. The rotation in the direction, the numerical value 0, indicates the stop of the rotation. Further, the control unit 4 stores a table in which control data is associated with 16 combinations of si = 1 or 0. In particular, when si = 1 (i = 1, 2, 3, 4), 0 is set as fi (i = 1, 2, 3, 4) of the corresponding control data. Further, when two or more of the first to fourth ventilation portions 11, 12, 13, and 14 are not blocked, that is, when Σsi ≦ 2, at least one of fi is 1, and the other is 2. Some control data is set. The control unit 4 controls the rotation and stop of the first to fourth fans 21, 22, 23, 24 based on the control data (f1, f2, f3, f4).

  Further, warning light-emitting diodes 5 are disposed at a substantially central portion in the left-right direction on the upper surface side of the housing 1 and a portion closer to the rear surface. Lighting of the light emitting diode 5 is controlled by the control unit 4. Further, a cross key 90 and a setting button 91 are disposed on the left side of the light emitting diode 5, and the control unit 4 is configured to detect the operation state of the cross key 90 and the setting button 91.

  The projector also includes a light source 6 including a metal halide lamp and a reflector that reflects light emitted from the metal halide lamp in a certain direction on an air passage route that passes through the housing 1 from the first ventilation portion 11 and the fourth ventilation portion 14. More specifically, it is provided inside the housing 1 on the optical axis of the lens 8 and on the back side of the back surface. The light from the light source 6 enters the light modulation element 7 disposed on the front side of the light source 6. The light modulation element 7 includes a liquid crystal panel that displays an image based on image data output from the control unit 4. Light incident from the light source 6 is light-modulated by passing through the liquid crystal panel. The light-modulated light enters the lens 8 and is projected on the screen. The light source 6 and the light modulation element 7 constitute a projection unit.

  FIG. 2 is a flowchart showing a processing procedure relating to rotation control of the first to fourth motors 21a, 22a, 23a, 24a by the control unit.

  When the light source 6 and the light modulation element 7 are driven, the control unit 4 periodically executes processing related to rotation control. The control unit 4 acquires the signal si output from the first to fourth detection units 31, 32, 33, and 34 (step S1). That is, an array (s1, s2) in which on / off of the signal si output from the first to fourth detection units 31, 32, 33, 34 is associated with the first to fourth detection units 31, 32, 33, 34. , S3, s4).

  Next, the control unit 4 determines whether Σsi is 3 or more (step S2). That is, it is determined whether or not three or more first to fourth ventilation portions 11, 12, 13, and 14 are blocked by the process of step S2. When it is determined that Σsi is 3 or more (step S2: YES), the control unit 4 outputs a signal for turning off the light source 6 to the light source 6 (step S3), and turns on the light emitting diode 5 (step S4).

  Then, the control unit 4 issues a warning that air cannot pass through the housing 1 based on the arrangement (s1, s2, s3, s4) of the signals si stored in the RAM, and instructs the removal of the obstacle. Is output to the light modulation element 7 (step S5).

  FIG. 3 is a schematic diagram of an image instructing removal of an obstacle. The image includes a message “Warning” and “please remove the obstacle”, and diagrams of the casing 1 and the first to fourth ventilation portions 11, 12, 13, and 14. In the diagram, the casing 1 is shown as a rectangle, and the first to fourth ventilation portions 11, 12, 13, and 14 are shown as rectangles buried in the sides of the rectangle. In addition, the inside of the rectangle indicating the first to fourth fans 21, 22, 23, and 24 on the side where the signal si = 1 is output is painted red. In FIG. 3, the inside of the rectangle indicating the second to fourth fans 22, 34, 34 is painted in red.

  Next, the control unit 4 starts measuring time by the timer 40 (step S6). And the control part 4 acquires the signal si which the 1st thru | or 4th detection part 31,32,33,34 outputs (step S7), and determines whether (SIGMA) si is 2 or less (step S8). . When it is determined that Σsi is greater than 2 (step S8: NO), the control unit 4 determines whether or not the timer 40 has counted a predetermined time (step S9). When it is determined that the timer 40 has timed the predetermined time (step S9: YES), the control unit 4 turns off the power (step S10) and ends the process related to the rotation control. If it is determined that the predetermined time has not been counted (step S9: NO), the control unit 4 returns the process to step S7.

  When it determines with (SIGMA) si being 2 or less by step S8 (step S8: YES), the control part 4 outputs the signal which makes the light source 6 light to the light source 6 (step S11). When the process of step S11 is completed or when it is determined in step S2 that Σsi is not 3 or more (step S2: NO), the control unit 4 reads the table (step S12), and the control data (f1, f2, f3) , F4) and an array of signals si (s1, s2, s3, s4), control signals for controlling the rotation of the first to fourth motors 21a, 22a, 23a, 24a are sent to the first to fourth motors 21a, It outputs to 22a, 23a, 24a (step S13), and the process regarding rotation control is finished.

  For example, when all the first to fourth ventilation parts 11, 12, 13, and 14 are not blocked, the control unit 4 stores the array (0, 0, 0, 0) of the signal si in the RAM, Based on the control data (1, 0, 0, 2) corresponding to the arrangement, the control signal for rotating in the intake direction is sent to the first motor 21a, and the rotation is stopped for the second motor 22a and the third motor 23a. A control signal for rotating the fourth motor 24a in the exhaust direction is output to the first to fourth motors 21a, 21b, 21c, and 21d. When only the first ventilation part 11 is blocked, the control part 4 stores the array (1, 0, 0, 0) of the signal si in the RAM and the control data (0, 0) corresponding to the array. 1, 2, 0), the first motor 21a and the fourth motor 24a have a control signal for stopping the rotation, the second motor 22a has a control signal for rotating in the intake direction, and the third motor 23a has a control signal. A control signal for rotating in the exhaust direction is output.

  In the projector according to the first embodiment, even if any one or two of the first to fourth ventilation portions 11, 12, 13, and 14 are blocked, the projector is not blocked. Rotate any one of the first to fourth fans 21, 22, 23, and 24 disposed in the first to fourth ventilation portions 11, 12, 13, and 14 in a direction in which intake is possible, and exhaust the other one It can be rotated in a possible direction, and a state in which air can pass through the housing 1 can be maintained.

  In addition, the first to fourth fans 21, 22, 23, and 24 arranged in any one of the first to fourth ventilation portions 11, 12, 13, and 14 blocked by the obstacle are rotated. By stopping the four motors 21 a, 22 a, 23 a, and 24 a, useless energy consumption due to the rotation of the first to fourth fans 21, 22, 23, and 24 can be suppressed.

  Further, when any three or more of the first to fourth ventilation portions 11, 12, 13, and 14 are blocked and the air cannot pass through the housing 1, the air cannot pass through the housing 1. A warning can be issued and displayed with an image instructing the removal of the obstacle.

  Furthermore, when three or more of the first to fourth ventilation parts 11, 12, 13, 14 continue to be blocked by obstacles, the control unit 4 turns off the light source 6 in the process of step S3. Further, it is possible to prevent the light source 6 from being turned on in a state where air cannot pass through the housing 1, and it is possible to prevent malfunction of the control unit 4 due to temperature abnormality, thermal deformation of the housing 1, and the like.

  The projector according to the first embodiment includes four fans arranged in the four ventilation portions. However, depending on the amount of heat generated by the light source, three ventilation portions or five or more ventilation portions and You may provide the fan distribute | arranged to each this ventilation part. When three vents and fans arranged in the vents are provided, when one vent is blocked and the two vents are not blocked, the fans arranged in the two vents are respectively By rotating in the forward and reverse directions, a state where air passes through the housing can be maintained. Similarly, in the case where five or more ventilation portions and a fan are provided, when the ventilation portion is blocked and any two or more of the ventilation portions are not blocked, air can pass through the housing. it can.

  Further, as an example of an embodiment of the present invention, a projector including a light source, a light modulation element, and the like has been described. However, the present invention is applied to other electric devices that include a ventilation unit and a fan and cool a load, such as a copying machine and a facsimile. The invention may be applied. When the present invention is applied to other electric devices, the same effects as those of the first embodiment can be obtained.

(Embodiment 2)
The projector according to the second embodiment is different from the projector according to the first embodiment in that the rotation directions of the first to fourth fans 21, 22, 23, and 24 can be manually switched as appropriate. The control unit 4 controls the rotation direction of the first to fourth motors 21a, 22a, 23a, and 24a and the control data (f1, f2, f3, f4) = (1, 0, 0, 2). ) Are stored in the RAM as initial values. When the power is turned on, the control unit 4 controls the rotation of the first to fourth motors 21a, 22a, 23a, 24a based on the control data.

  FIG. 4 is a flowchart illustrating a processing procedure related to rotation control of the control unit 4 included in the projector according to the second embodiment.

  When any one of the first to fourth detection units 31, 32, 33, and 34 is turned on from the off state or when the setting button 91 is turned on, the control unit 4 The signal si output from the fourth detectors 31, 32, 33, and 34 is acquired (step S101), and it is determined whether or not Σsi is 3 or more (step S102). The processing of step S103 to step S111 executed by the control unit 4 when it is determined in step S102 that Σsi is 3 or more is the same processing as step S13 to step S11 shown in FIG. When it is determined in step S102 that Σsi is smaller than 3 (step S102: NO), or when the process of step S111 for turning on the light source 6 is finished, the control unit 4 arranges the signal si (s1, s2, s3, Based on s4), information on an obstacle that blocks the first to fourth ventilation portions 11, 12, 13, and 14, that is, data for OSD display of an image indicating the intake / exhaust state is output to the light modulation element 7 ( Step S112).

  FIG. 5 is a schematic diagram of an image showing an intake / exhaust state. The image showing the intake / exhaust state shows the casing 1 and the first to fourth fans 21, 22, 23, and 24 in the same manner as in FIG. 3. Further, the inside of the rectangle indicating the first to fourth fans 21, 22, 23 and 24 to which the signal si = 1 is output is painted in red. In FIG. 5, the inside of the rectangle indicating the third and fourth fans 23 and 24 is painted in red.

  Next, by detecting the operation state of the cross key 90, particularly the operation state of the left and right keys, it is determined whether or not the left and right keys are on (step S113). When it is determined that the left / right key is on (step S113: YES), the control unit 4 changes any one of the first to fourth fans 21, 22, 23, and 24 to be switched. (Step S114). In the initial state, the first fan 21 is a target for switching the rotation direction. In addition, the control unit 4 displays a target to be switched, for example, OSD display data for displaying an image surrounding one of the first to fourth fans 21, 22, 23, and 24 to be switched with a frame. Output to.

  When the process of step S114 is completed, or when it is determined in step S113 that the left and right keys are not on (step S113: NO), the control unit 4 detects the operation state of the cross key 90, particularly the operation state of the up and down keys. Thus, it is determined whether or not the up / down key is on (step S115). When it is determined that the up / down key is on (step S115: YES), the control unit 4 selects one of the first to fourth fans 21, 22, 23, 24 selected as the target for switching the rotation direction. The corresponding control data fi is changed from 0 to 1 or from 1 to 0 (step S116).

  When the process of step S116 is completed, or when it is determined in step S115 that the up / down key is not on (step S115: NO), the control unit 4 detects the operation state of the setting button 91, so that the setting button 91 is It is determined whether or not it is on (step S117). When it determines with the setting button 91 not being ON (step S117: NO), the control part 4 returns a process to step S112. When it is determined that the setting button 91 is on (step S117: YES), the control unit 4 performs the first to fourth motors 21a, 22a, 23a, based on the control data (f1, f2, f3, f4). A control signal for controlling the rotation and stop of 24a is output to the first to fourth motors 21a, 22a, 23a, 24a (step S118), and the processing relating to the rotation control is finished.

  In the projector according to the second embodiment, the intake and exhaust directions can be manually changed as appropriate by operating the setting button 91 and the cross key 90 without changing the attitude of the arranged projector. Therefore, for example, a projector user can avoid the hot air exhausted by changing the intake and exhaust directions.

  In addition, by displaying an image indicating that the air passage direction has changed due to an obstacle, it is possible to notify that any of the first to fourth ventilation parts 11, 12, 13, and 14 is blocked. it can. Accordingly, the projector user who has received the notification can recognize that one of the first to fourth ventilation portions 11, 12, 13, and 14 is blocked, and the air passes through the housing 1. As described above, the fans arranged in any two of the first to fourth ventilation portions 11, 12, 13, and 14 that are not blocked can be rotated in the intake and exhaust directions.

  Other configurations, operations, and effects other than the processing procedure of the control unit 4 are the same as the configurations, operations, and effects of the projector according to the first embodiment. The detailed explanation is omitted.

  Although the projector according to the second embodiment includes four fans disposed in the four ventilation portions, the projector may include two ventilation portions and a fan disposed in each of the ventilation portions. . For example, you may provide a ventilation part and a fan in the both sides | surfaces of a housing | casing. When the fan on the right side rotates in the intake / exhaust direction and the fan on the left side rotates in the exhaust / intake direction, air passes through the housing from the right / left side to the left / right side. Switches between the forward and reverse rotation directions of the fan with the setting button and the cross key to select a state where air passes through the housing from the left side to the right side and a state where air passes through the housing from the right side to the left side be able to. Therefore, the user on the left side of the casing can avoid the hot air exhausted from the casing without moving.

  Moreover, when the ventilation part is provided in the both sides | surfaces of a housing | casing, you may arrange | position one fan only to the ventilation part of a right side surface. When the fan on the right side rotates in the intake / exhaust direction, air is sucked / exhausted from the vent on the right side, and exhausted / intaked from the vent on the left side according to the intake / exhaust of the vent. Therefore, the user of the projector can avoid the hot air exhausted from the housing by appropriately switching the rotation direction of the fan, as in the case of providing two fans.

1 is a block diagram showing a projector according to Embodiment 1 of the present invention. It is a flowchart which shows the process sequence regarding rotation control of the 1st thru | or 4th motor by a control part. It is a schematic diagram of the image which instruct | indicates the removal of an obstruction. 10 is a flowchart illustrating a processing procedure related to rotation control of a control unit included in a projector according to Embodiment 2. It is a schematic diagram of an image showing an intake / exhaust state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 4 Control part 5 Light emitting diode 6 Light source 7 Light modulation element 8 Lens 9 Operation part 11 1st ventilation part 12 2nd ventilation part 13 3rd ventilation part 14 4th ventilation part 21 1st fan 22 2nd fan 23 2nd 3 fan 24 4th fan 21a 1st motor 22a 2nd motor 23a 3rd motor 24a 4th motor 31 1st detection part 32 2nd detection part 33 3rd detection part 34 4th detection part 40 timer 90 cross key 91 setting button

Claims (14)

In an electrical device in which air passes through the casing by rotating a fan disposed in the ventilation portion of the casing,
An electric device comprising means for switching the direction of rotation of the fan between forward and reverse. There are a plurality of vents,
The fan is
Are arranged in each of the ventilation parts,
Detecting means for detecting an object facing each ventilation part on the outside;
The electrical apparatus according to claim 1, further comprising: means for notifying that there is an object facing the ventilation portion when the detection means detects an object. There are three or more vents,
The fan is
Are arranged in each of the ventilation parts,
Detecting means for detecting an object facing each ventilation part on the outside;
Based on the detection result of the detection means, a specifying means for specifying a ventilation part that is not facing the object;
When the specifying means specifies two or more ventilation portions that are not opposed to an object, the rotation direction of the fans is such that the rotation directions of the fans arranged in any two specified ventilation portions are normal and reverse. The electric device according to claim 1, further comprising: The electrical apparatus according to claim 3, further comprising means for notifying that there is an object facing the ventilation section when the detection means detects an object. 5. The apparatus according to claim 2, further comprising a unit configured to stop rotation of a fan disposed in a ventilation portion facing the object when the detection unit detects the object. Electrical equipment. A determination unit that determines whether or not the ventilation portion of the object that is not facing is 1 or less based on a detection result of the detection unit;
The electrical apparatus according to claim 2, further comprising a unit that issues a warning when it is determined that the determination unit is 1 or less. In the projector in which the projection means for projecting the projection light for displaying the image is air-cooled by rotating the fan disposed in the ventilation portion of the housing.
A projector comprising means for switching the rotation direction of the fan between forward and reverse. There are a plurality of vents,
The fan is
Are arranged in each of the vents,
Detecting means for detecting an object facing each ventilation part on the outside;
The projector according to claim 7, further comprising means for notifying that there is an object facing the ventilation portion when the detection means detects an object. There are three or more vents,
The fan is
Are arranged in each of the ventilation parts,
Detecting means for detecting an object facing each ventilation part on the outside;
Based on the detection result of the detection means, a specifying means for specifying a ventilation part that is not facing the object;
When the specifying means specifies two or more ventilation portions that are not opposed to an object, the rotation direction of the fan is such that the rotation directions of the fans arranged in any two specified ventilation portions are normal and reverse. The projector according to claim 7, further comprising: means for controlling the projector. The projector according to claim 9, further comprising means for notifying that there is an object facing the ventilation portion when the detection means detects an object. The said detection means is equipped with a means to stop rotation of the fan arrange | positioned at the ventilation | gas_flowing part which the object opposes. The any one of Claims 8 thru | or 10 characterized by the above-mentioned. Projector. A determination unit that determines whether or not the ventilation portion of the object that is not facing is 1 or less based on a detection result of the detection unit;
The projector according to any one of claims 8 to 11, further comprising means for issuing a warning when it is determined that the determination means is 1 or less. The projector according to claim 12, wherein when the determination unit determines that the number is 1 or less, projection light for displaying an image related to a warning is projected onto the projection unit. The projector according to claim 12 or 13, further comprising means for stopping projection of projection light by the projection means when the determination means determines that the number is 1 or less.

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