KR102419152B1 - Beam projector to control lamp cooling during shutdown time - Google Patents

Abstract

The present invention relates to a beam projector for cooling and controlling a lamp during a shutdown time. The beam projector according to the present invention comprises: a main body irradiating an image on a screen by light emission of a lamp; a cooling unit cooling the lamp and including a cooling mode classified by high and low voltage; a detecting unit detecting on/off of the main body and generating driving and shutdown signals; a timer interlocked with the detecting unit to check a first shutdown time from an off point of a first driving time of the main body to an on point of a second driving time of the main body; and a control unit including a learning part which receives the first shutdown time from the timer and classifies the first shutdown time into a plurality of levels according to a length of the first shutdown time, and a cooling and driving part which controls driving of the cooling unit by selecting a cooling mode of the cooling unit according to the level of the first shutdown time in a second shutdown time from an off point of the second driving time to an on point of a third driving time of the main body. According to the beam projector for cooling and controlling a lamp during a shutdown time according to the present invention, the operation stability of the beam projector can be guaranteed by learning the shutdown time immediately after driving the main body, that is, the lamp, and a length of the same, and then cooling the lamp at a subsequent shutdown time.

Description

Beam projector to control lamp cooling during shutdown time

The present invention relates to a beam projector including a function to control cooling of a lamp at shutdown time, and more specifically, to learn the shutdown time when driving past the so-called shutdown time in which the image transmission function, which can be said to be a basic function of the projector, is turned off Accordingly, it relates to a beam projector that differentially cools and controls a lamp through a cooling unit according to the high and low of the shutdown time of the last driving.

A beam projector is a display device widely used in educational institutions as well as public institutions because it can project images in various directions and express the images on screens of various sizes.

Such a beam projector is generally equipped with a lamp made of a high-pressure mercury lamp, and the high-pressure mercury lamp has the advantage of providing high illuminance while being relatively inexpensive.

However, such a high-pressure mercury lamp has a disadvantage in that it emits a large amount of heat while being driven for image projection.

In general, the lifespan of a mercury lamp is very closely related to the temperature, so it is necessary for the manager to professionally manage the temperature control of the lamp, but the problem is that it is cumbersome or difficult for the manager to perform the temperature control individually.

In order to prevent the lamp made of such a mercury lamp from being easily damaged, cooling treatment must be performed after turning on the power and driving the lamp as well as before operation, otherwise it may seriously affect the life and stability of the lamp.

In other words, the beam projector must take a long enough time to cool the lamp when the power is turned off, but many users are not aware of this fact.

In fact, general beam projectors turn off immediately or turn off within 10 seconds when the power is turned off. When a high-pressure mercury lamp is driven, the temperature can rise to 1000 degrees. There is a risk of burning and damaging the surrounding parts, and in reality, it is a beam projector that is broken for this reason.

As a result of researching domestic and foreign prior art for cooling the lamp of the beam projector, Korean Patent Publication No. 10-2010-0020232 discloses, in a cooling device of a portable communication device having a camera lens module or a beam projector, the camera lens module a lens cover opening and closing the lens opening or the lens opening of the beam projector according to sliding movement; at least one input/output unit formed in the main body of the communication device and provided on a rear surface of the lens cover unit; and formed in the lens cover part, when opening the lens openings, coincide with the inlet and outlet parts to be opened, and hot air generated inside the body is discharged to the outside or cold air from the outside is introduced to the body of the body. It lowers the internal temperature and includes at least one inlet/outlet cooling unit that also closes the inlet and outlet when the openings of the lens are closed, eliminating the need for an existing air-cooled or water-cooled cooling device, thereby reducing the manufacturing cost and slimming the size of the product It has been shown to be effective.

However, according to the above technique, in general, if the lamp is cooled while the lamp of the beam projector is being driven, cooling efficiency decreases, so it is necessary to cool the lamp during the so-called shutdown time when the lamp is not driven. There is a problem in that it does not provide a special solution for properly cooling the lamp.

Therefore, it is possible to efficiently cool the lamp during the lamp shutdown time, including immediately after the lamp is driven, but to maximize the cooling efficiency by differentially controlling the cooling intensity or time according to the length of the lamp's past shutdown time. And the need to develop an advanced beam projector is emerging.

The present invention has been devised to overcome the problems of the above technology, and efficiently cools the lamp during the shutdown time of the lamp including immediately after the lamp is driven, but the cooling intensity or time is reduced according to the length of the lamp's past shutdown time. Its main purpose is to provide a beam projector that maximizes cooling efficiency by differentially controlling it.

Another object of the present invention is to divide the length of the shutdown time into multi-level levels and differentially control the voltage supplied to the cooling unit according to the corresponding level.

Another object of the present invention is to provide an alarm means capable of notifying an administrator of the need for cooling when the shutdown time is shorter than a predetermined time by learning the past shutdown time several times.

It is a further object of the present invention to provide a separate functional coolant capable of enhancing cooling performance in addition to the blowing function of a cooling unit composed of a fan.

In order to achieve the above object, in accordance with the present invention, there is provided a beam projector for controlling cooling of a lamp during shutdown, comprising: a main body for irradiating an image on a screen by light emission of the lamp; A cooling unit that cools the lamp and includes a cooling mode divided by high and low voltages; a detection unit that detects on/off of the main body and generates driving and shutdown signals; a timer interlocking with the detection unit to check a first shutdown time from an off time point of the first driving time of the main body to an on time point of the second driving; a learning part that receives the first shutdown time from the timer and divides the first shutdown time into a plurality of levels according to the length of the first shutdown time; and a control unit including a cooling driving part for controlling driving of the cooling unit by selecting a cooling mode of the cooling unit according to the level of the first shutdown time in the second shutdown time up to the time on time.

In addition, in a state in which the cooling unit consists of a fan, the cooling mode is divided into a first operating mode of 11 to 13V, a second operating mode of 8 to 10V, and a third operating mode of 6 to 7V, and the level is, The first shutdown time is divided into a first level of 1 to 30 seconds, a second level of 31 to 90 seconds, and a third level of 91 seconds or more, and the cooling driving part includes the first, second, and third levels of the first, 2, 3 It is characterized in that by selecting a cooling mode of the cooling unit to correspond to the operation mode to drive and control the cooling unit.

In addition, the learning part identifies past shutdown times that are a plurality of shutdown times prior to the first shutdown time, the beam projector includes an alarm unit, and the control unit determines that the past shutdown time is less than a predetermined time It is characterized in that it includes an alarm driving part for outputting alarm information through the alarm unit.

According to the beam projector for cooling control of the lamp during the shutdown time according to the present invention,

1) It is possible to ensure the stability of the operation of the beam projector by learning the main body, that is, the shutdown time and its length immediately after the lamp is driven, and then cooling the lamp at the subsequent shutdown time,

2) A more efficient lamp cooling function can be exhibited by making a difference in cooling performance depending on the length of the shutdown time.

3) If the shutdown time is repeated and the short state persists, it is possible to prevent damage to the beam projector in advance by forcibly cooling the projector.

4) When forcibly cooling the lamp, it has the effect of cooling the lamp more quickly by providing the lamp with a functional coolant.

1 is a block diagram showing a schematic configuration of a beam projector of the present invention.
2 is a conceptual diagram illustrating the concept of a driving time and a shutdown time according to the present invention.
3 is a conceptual diagram illustrating a cooling mode selected for each level of a shutdown time.
Figure 4 is a cross-sectional view showing a structure in which the injection unit connected to the injection nozzle is installed in the cooling path of the beam projector of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are not drawn to scale, and like reference numbers in each drawing refer to like elements.

1 is a block diagram showing a schematic configuration of a system of the present invention.

As can be seen from FIG. 1 , the projector of the present invention is based on including a main body 10 , a cooling unit 20 , a detection unit 30 , a timer 40 , and a control unit 50 .

First, the main body 10 is expressed by integrating various parts that perform the basic functions of a known projector, and these parts are included in the housing to emit an image to the screen (not shown) by the light emission of the lamp 11 . to provide. Since the main body 10 has the same configuration as that of a known beam projector, a separate description thereof will be omitted.

In the present invention, the projection of the image on the screen by the beam projector is expressed as 'the beam projector drives' or 'the main body 10 drives (operates)'.

In addition, the detection unit 30 and the timer 40, which will be described later, are communication-connected in a wired/wireless manner, and the cooling unit 20 and the memory (not shown) are each electrically connected to the control unit 50 for signal processing. . Furthermore, it is preferable that the detection unit 30 and the timer 40 , the cooling unit 20 and the memory are electrically connected to the control unit 50 for quick and efficient control of the control unit 50 .

In addition, in various configurations of the present invention to be described later, power is arranged so that electricity can be supplied through a power supply means provided in the beam projector even when the main body 10 is turned off, so that the lamp 11 in the main body 10, etc. It has a foundation to perform its original function while receiving power stably even when the power is off.

The cooling unit 20 of the present invention may be mounted around the lamp 11 to cool the lamp 11, which is a core component of the beam projector. More specifically, the lamp 11 and the lamp 11 through the cooling path 21 This is to cool the lamp 11 through the cooling path 21 through internal communication, and the lamp 11 of the beam projector generates high pressure and high heat. In order to perform a function of efficiently cooling the lamp 11 .

In particular, in the present invention, when the cooling unit 20 is driven together with the operation of the main body 10 for image output, noise generated by driving the cooling unit 20 may interfere with image viewing. It provides a key function of efficiently driving and controlling the above-described cooling unit 20 during a time when is not operated, that is, a shutdown time.

The cooling unit 20 may be applied to various known cooling means such as an electric cooler, specifically a fan, which is cooled by power supply, and in particular, in the present invention, the operating voltage of a cooling device such as an electrically operated cooler. It may include a function of setting and then controlling it through the control unit 50 .

Specifically, when the cooling unit 20 is composed of a fan (a cooling fan in which the blades rotate by driving the motor including the motor and the blades), the operation mode of the fan is high/medium/low according to the high/low operating voltage. can be divided into operating modes.

The present invention is based on the principle that the intensity of the fan (the number of rotations of the fan) is proportional to the operating voltage, that is, the higher the working voltage, the faster the fan operates at a faster rotation speed to cool the lamp 11 more quickly. Assuming that you can.

Specifically, the high operating voltage (high voltage) that can be referred to as the first operating mode is 11 to 13V, the middle operating voltage (medium voltage) as the second operating mode is 8 to 10V, and the third operating mode is low operating voltage (low voltage) may be set to 6 to 7V.

A difference in the rotation speed of the fan occurs according to the operation mode setting with such a difference in operating voltage. In other words, when a higher voltage than a lower voltage is applied to the fan, the fan rotates faster.

The detection unit 30 and the control unit 130 of the present invention are implemented through hardware such as CPU and memory provided in the beam projector, and the steps of the method or algorithm described in relation to the above configuration of the present invention are directly implemented in hardware It may be implemented as a software module executed by hardware, or may be implemented by a combination thereof. A software module is a random access memory (RAM), read only memory (ROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), flash memory, hard disk or well in the art to which the present invention pertains. It may reside in any known computer-readable recording medium.

That is, the detection unit 30 and the control unit 50 of the present invention may be implemented as a program (or application) to be executed in combination with a computer, which is hardware, and stored in a medium. Components of the present invention may be implemented as software programming or software components, and similarly, embodiments may include various algorithms implemented as data structures, processes, routines, or combinations of other programming constructs, including C, C++ , may be implemented in a programming or scripting language such as Java, assembler, or the like. Functional aspects may be implemented in an algorithm running on one or more processors.

The configuration of these 'modules' or 'parts' or 'interfaces' means a configuration of hardware such as software or FPGA or ASIC that is executed via CPU and memory in a state installed and stored in a storage means installed in the beam projector. In this case, the configuration of 'module', 'unit', and 'interface' is not limited to hardware, and may be configured to be in an addressable storage medium or may be configured to reproduce one or more processors.

Specifically, the detection unit 30 detects the off state of the main body 10, that is, the shutdown state, and generates a shutdown signal, and detects the on state of the main body 10, that is, the driving state, and drives As generating a signal, a function of transmitting the generated driving signal and shutdown signal to the timer 40 to be described later is performed.

Here, the 'shutdown state of the projector' means a state in which the operation of the beam projector, specifically the main body 10, is turned off, that is, the main function of a general beam projector projected on the screen by enlarging the image is off. it means

That is, the user operates the on/off switch of the beam projector to indicate a state in which the processing is turned off.

The timer 40 is operated at the time when the off signal transmitted by the detection unit 30 is received, as well as performing a function of measuring the time that the lamp 11 is operated, that is, the detection unit 30 described above. In conjunction with the main body 10 performs a function of checking the first shutdown time from the off point of the first drive to the on point of the second drive.

In the present invention, the concepts of first, second, and third driving times and first and second shutdown times are used. For a clear explanation of these concepts, reference is made to FIG. 2 attached thereto.

2 is a conceptual diagram illustrating the concept of a driving time and a shutdown time according to the present invention.

In the present invention, "driving time" refers to the time from the on point to the off point of the main body, and as can be seen from FIG. 2, when the main body 10 is driven three times, the first, second, It can be divided into 3 driving times.

The shutdown time is a time during which the main body 10 stops driving, and may also be referred to as a time between the above-described driving times.

Referring to FIG. 2 , a time between the first driving time and the second driving time may be understood as a first shutdown time, and a time between the second driving time and the third driving time may be understood as a second shutdown time.

According to this, the timer 40 interlocks with the detection unit 30 to check the shutdown time, which is the time from when the main body 10 stops driving to the next driving.

According to this time check function, the timer 40 can check the first, second, and third driving times as well as check the second shutdown time as well as the above-described first shutdown time.

In the beam projector of the present invention, when the on/off operation for the driving of the main body 10 occurred in the past at the second shutdown time point for substantially driving the cooling unit 20, the length of the previous shutdown time It can be said to provide a function of differentially driving the cooling unit at the second shutdown time, which is the current time, according to the learning result after learning in advance whether to have

In other words, by grasping the past (previous) driving and shutdown times (the first and second driving times and the first shutdown time), the cooling unit 20 ) to run efficiently.

The beam projector of the present invention learns the past shutdown time (first shutdown time) and differentially drives the cooling unit 20 at the current shutdown time (second shutdown time), the learning part 51 and the cooling driving part 52 ) includes a control unit 50 having a.

The control unit 50 is interlocked with the memory, and the memory stores the signals transmitted from the control unit 50, for example, the first, second, and third driving times as well as the first and second shutdown times, and the time of the first shutdown time. It stores the cooling mode of the cooling unit 20 selected according to the level and transmits the above-mentioned signal to the control unit 50 by calling the control unit 50 when the main body 10 is driven (third drive) do.

The learning part 51 of the controller 50 receives the first shutdown time from the timer 40 and provides a function of dividing the first shutdown time into a plurality of levels according to the length of the first shutdown time.

At this time, the 'level' is a concept for corresponding to the first, second, and third operation modes described above. Specifically, the first level is the first operation mode, the second level is the second operation mode, and the third level is the third operation mode. corresponding to the mode.

In this case, the first level may be designated as a first shutdown time of 1 to 30 seconds, the second level as 31 to 90 seconds, and the third level as 91 seconds or longer.

That is, the learning part 51 performs a function of learning the shutdown time in a manner that detects the length of the past shutdown time in order to differentially drive the cooling unit 20 at the current shutdown time (the second shutdown time).

The cooling drive part 52 has a second shutdown time (the time from the off point of the second drive time to the on point of the third drive time of the main body 10) at the level (ie, length) of the first shutdown time described above. The function of driving and controlling the cooling unit 20 is performed by selecting the cooling mode of the cooling unit 20 according to the length of the short or long).

3 is a conceptual diagram illustrating a cooling mode selected for each level of a shutdown time.

As can be seen from FIG. 3 , the cooling driving part 52 selects and controls the operation mode of the cooling unit 20 that is also divided into three levels in a state divided into three levels according to the length of the first shutdown time. function can be performed.

The first operating mode of the cooling unit 20, in which the first shutdown time is selected as the first level, applies an operating voltage of 11 to 13V to the cooling unit 20 for a predetermined time, for example, within 30 seconds to select one of three operating modes. The temperature of the lamp 11 is cooled the fastest.

At this time, the reason that the driving time of the cooling unit 20 is set to 30 seconds or less is that the highest voltage is applied among the three operation modes, and thus the time is set as short as possible to prevent power wastage.

Although this first operation mode has an advantage of rapidly cooling the lamp 11, the cooling unit 20, that is, the rotation speed (number of rotations) of the fan is relatively high, and noise may occur.

The second operating mode of the cooling unit 20 in which the first shutdown time is selected as the second level applies an operating voltage of 8 to 10V to the cooling unit 20 for 30 to 90 seconds to relatively quickly increase the temperature of the lamp 11 Cool down. In this second operation mode, the driving time of the cooling unit 20 is set to 30 seconds to 90 seconds, which is a longer time than the first operation mode, because a lower voltage is required compared to the first operation mode.

The third operation mode of the cooling unit 20 in which the first shutdown time is selected as the third level is to apply an operating voltage of 6 to 7V to the cooling unit 20 for 90 seconds or more to cool the lamp 11 . Since this requires the most operating voltage, it can be set as the longest driving time of the cooling unit 20 and has the best cooling effect as well as the lowest fan noise.

If the main body 10 is driven again before the above-described driving time of the cooling unit 20 has elapsed, the driving of the cooling unit 20 may be terminated without fully filling the above-described driving time, but the lamp 11 ), even when the main body 10 is driven, it is more preferable to set the cooling unit 20 to stop after filling the above-described driving time for efficient cooling.

That is, the beam projector of the present invention does not secure sufficient time to cool the lamp 11 as the shutdown time is shorter. It provides the purpose of securing additional cooling performance.

To sum up, the beam projector of the present invention cools the lamp 11 actively and efficiently by differentially adjusting the intensity or time of the cooling unit 20 according to the long and short duration of the previously learned shutdown time, thereby significantly reducing the occurrence of malfunctions and providing stability. As a result, it provides a characteristic capable of driving the main body 10 .

In the above-described example, although the driving start time of the main body 10 has been described as the first driving time, the main body 10 may be driven even at a time before the first driving time, and in this case, before the first driving time The driving time of the main body 10 can be grasped from the learning part 51 linked to the timer 40 .

In other words, the learning part 51 may include a function of identifying a past shutdown time that is before the above-described first shutdown time, and furthermore, a plurality of past shutdown times.

At this time, the beam projector of the present invention may further include an alarm unit (60).

The alarm unit is mounted on one side of the main body to perform a function of outputting an alarm sound to the speaker in a state in which a visual alarm, that is, a light emission of an alarm or an audible alarm, and a speaker is provided.

More preferably, the alarm unit 60 may be formed of a display (not shown) mounted on one side of the main body 10 .

This display provides the administrator with the ability to transmit an alarm message or a visual signal that an alarm lamp can emit in a specific color (including flashing lighting).

Correspondingly, the control unit 50 may additionally provide a function of outputting alarm information through the alarm unit 60 when it is determined that the above-described past shutdown time is less than a predetermined time. In this case, the 'predetermined time' may be set to 10 seconds.

For example, when the arithmetic mean value of the three shutdown times before the first shutdown time is less than 10 seconds, time to sufficiently drive the cooling unit 20 is not secured by the shutdown time, so that the lamp 11 is not properly cooled. Alarm information through the alarm unit 60, for example, a visual message consisting of characters such as “Because additional lamp cooling is required, please control the operation of the cooling unit manually.” to the alarm unit 60 (display) It is processed to ensure additional cooling of the lamp 11 by outputting it.

At this time, since the manager may overlook or ignore this alarm information and may not be able to additionally drive the cooling unit 20 , further, the cooling driving part 52 operates the cooling unit 20 for a certain period of time regardless of the length of the second shutdown time. It is possible to include a function to force the drive for (for example, 60 seconds).

That is, this is to prevent the lamp 11 from being not properly cooled because the shutdown time is too short before the first shutdown time, and the cooling unit 20 is forcibly turned off even if the second shutdown time is short. It can be said that the cooling state of the lamp 11 is secured by driving for a predetermined time such as 60 seconds.

As a result, when the user frequently turns on/off the main body 10 or turns off the main body 10 and then immediately turns on the main body 10 again, the shutdown time is short and the cooling time is not secured automatically. By forcibly cooling the lamp 11 , it provides a characteristic capable of securing stability due to efficient cooling of the lamp 11 .

4 is a cross-sectional view showing a structure in which the injection unit connected to the injection nozzle is installed in the cooling path of the beam projector of the present invention.

As mentioned above, when the cooling unit 20 composed of a fan is driven, a path for transmitting the wind generated by the rotation of the fan to the lamp 11 is required, which is referred to as the cooling path 21 .

That is, it is the principle of cooling the lamp 11 by transferring the wind generated by the rotation of the fan through the cooling path 21 to the lamp 11 . When the cooling unit 20 is forcibly driven, the cooling path 20 In addition, it is possible to spray a functional coolant.

To this end, it is possible for the beam projector of the present invention to include the tank 70 and the injection unit 80 as well as the cooling path 21 described above. At this time, a plurality of spray nozzles connected to the spray unit 80 are installed in the cooling furnace 21 , and when the functional coolant is sprayed from the spray nozzles, the functional coolant is supplied to the lamp 11 through the cooling furnace 21 together with the wind of the fan. ) can be passed to

The tank 70 is mounted on one side of the main body 10 within the housing and performs a function of storing a functional coolant to be described later, and the spray unit 80 is connected to the tank 70 and the spray nozzle in a state including a pump. and provides a function of spraying the functional coolant stored in the tank 70 to the spray nozzle of the cooling furnace 21 by the operation of the pump.

At this time, the functional coolant injected from the spray nozzle is sprayed diagonally to the lamp 11 rather than directly injected into the lamp 11 , so that the functional coolant directly contacts the lamp 11 and sparks at the high temperature of the lamp 11 . It is desirable to prevent the problem of splashing or rather impairing the stability of the lamp 11 .

In addition, it is possible to adjust the diameter of the spray nozzle and the pressure of the pump so that the functional coolant sprayed from the spray nozzle can be sprayed as a mist through a spray in a state where the particles are processed to a small size at the level of fine powder (droplets). . Accordingly, it is possible to minimize the problem of the functional coolant sticking to the inside of the cooling furnace 21 or the lamp 11 itself in a state in which it is enlarged like a lump having a certain diameter.

Furthermore, the spray nozzle can be arranged as far away as possible from the ramp 11, for example, to be concentrated around the air inlet to minimize the problem of direct contact of the functional coolant to the ramp 11, or otherwise to the air inlet. The functional coolant injected from the installed spray nozzle is sprayed toward the porous air filter additionally installed on the side of the air inlet, so that the air introduced into the air inlet can contact the functional coolant while passing through the air filter, so that the functional coolant is transferred to the lamp (11). ) can be prevented as much as possible from adversely affecting the

The functional coolant of the present invention preferably includes methylene chloride, which has a boiling point of 39.6° C., has a high level of volatility, and has a large heat of vaporization absorbed during volatilization. Spraying a functional coolant containing methylene chloride When spraying from the nozzle, the functional coolant is delivered to the lamp 11 through the cooling path 21 together with the wind of the cooling fan, so that a high level of cooling function can be delivered to the lamp.

With this structure, when the lamp 11 is forcibly cooled, which is a point when cooling of the lamp 11 is desperately needed, a functional coolant is additionally delivered to the lamp 11 in addition to the wind of the fan, so that the cooling efficiency is instantaneous even in a short cooling time. to provide a characteristic that can further ensure the stability of the lamp 11 .
As described so far, the configuration and operation of the beam projector for cooling and controlling the lamp during the shutdown time according to the present invention are expressed in the above description and drawings, but these are merely examples and the spirit of the present invention is reflected in the above description and drawings. It is not limited, and various changes and modifications are possible without departing from the technical spirit of the present invention.

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10: body 11: lamp
20: cooling unit 21: cooling furnace
22: spray nozzle 30: detection part
40: timer 50: control unit
51: learning part 52: cooling drive part
60: alarm unit 70: tank
80: injection unit

Claims (8)

A beam projector with a function to control cooling of a lamp during shutdown, comprising:
a body irradiating an image on the screen by the light emission of the lamp;
A cooling unit that cools the lamp and includes a cooling mode divided by high and low voltages;
a detection unit that detects on/off of the main body and generates driving and shutdown signals;
a timer interlocking with the detection unit to check a first shutdown time from an off time point of the first driving time of the main body to an on time point of the second driving;
alarm unit;
Learning to receive the first shutdown time from the timer, divide the first shutdown time into a plurality of levels according to the length of the first shutdown time, and identify past shutdown times that are a plurality of shutdown times before the first shutdown time A part and a cooling mode of the cooling unit are selected according to the level of the first shutdown time in a second shutdown time from an off point of the second driving time to an on time of the third driving time of the main body to drive the cooling unit A beam projector comprising: a cooling driving part for controlling the cooling driving part; and an alarm driving part outputting alarm information through the alarm unit when it is determined that the past shutdown time is less than a predetermined time. The method of claim 1,
In a state in which the cooling unit consists of a fan,
The cooling mode is
divided into a first operating mode of 11-13V, a second operating mode of 8-10V, and a third operating mode of 6-7V,
The level is
The first shutdown time is divided into a first level of 1 to 30 seconds, a second level of 31 to 90 seconds, and a third level of 91 seconds or more,
The cooling drive part,
The first, second, and third levels correspond to the first, second, and third operation modes, characterized in that by selecting the cooling mode of the cooling unit to drive and control the cooling unit, the beam projector. The method of claim 1,
The alarm unit,
A beam projector, characterized in that the display is installed on one side of the main body. The method of claim 1,
The cooling drive part,
When the alarm information is output by the alarm unit, the beam projector, characterized in that forcibly driving the cooling unit for a predetermined time regardless of the length of the second shutdown time. 5. The method of claim 4,
The beam projector,
A cooling path connecting the cooling unit and the lamp, the cooling path including a plurality of injection nozzles;
A tank storing a functional coolant containing methylene chloride, and
and a spraying part for spraying the functional coolant to the spraying nozzle,
The cooling drive part,
When the forced driving, the beam projector, characterized in that by driving the injection unit to inject the functional coolant to the cooling path through the injection nozzle. delete delete delete

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