KR20180046542A - Power control system of outdoor information display apparatus - Google Patents

Abstract

The present invention relates to a power system of an outdoor information display device, which comprises: a display panel installed at a front surface part of a housing; a thermoelectric module having a heat generation surface to be exposed to the outside through an opening formed at a rear surface part of the housing, and installed in the housing to allow a cooling surface opposite to the heat generation surface to face to the display panel; a heat radiating plate installed outside the housing while being in contact with the heat generation surface of the thermoelectric module; a cooling fan coupled to the heat radiating plate; and a control unit for controlling power supply to the thermoelectric module. When power is supplied under the control of the control unit, the thermoelectric module generates current corresponding to a difference in the temperature between the cooling surface exposed to internal air of the housing and the heat generation surface in contact with the heat radiating plate, to provide the same as driving power for driving the cooling fan. Thus, the heat radiating plate in contact with the heat generation surface of the thermoelectric device is installed outside the housing, and an electromotive force generated by the thermoelectric device is used as a power source for driving the cooling fan radiating heat of the radiating plate. Accordingly, it is possible to reduce power consumption while efficiently cooling the inside of the device.

Description

[0001] POWER CONTROL SYSTEM OF OUTDOOR INFORMATION DISPLAY APPARATUS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply system for an outdoor information display apparatus, and more particularly, to a power supply system for an outdoor information display apparatus, The present invention relates to a power supply system for an outdoor information display device that can efficiently cool the inside of a device and reduce power consumption by using the fan as a power source for driving the fan.

An information display device, also referred to as a smart board or an electronic bulletin board, is a device for receiving a command from a user through a touch interface and outputting information corresponding to the command, And the like.

Typically, a large display is applied to the information display device, and the user is configured to be able to write on the display directly. Therefore, when a presentation is performed in a lecture or a meeting using an information display apparatus, the user stays on one side (e.g., left side, right side) of the electronic board in parallel with the board and explanation, for convenience of explanation.

Since information display devices have many advantages such as diversity of information providing and ease of use, they are increasingly used in all industrial fields, and are used for outdoor lectures or presentations, Traffic information, and the like.

In terms of electronic device operation, outdoor environment is known to be very severe compared to indoor environment.

In particular, direct sunlight due to sunlight in summer and heat in the display itself may cause the temperature inside the display system to exceed 90 ° C. At this time, a blackout phenomenon occurs in the display. When a blackout phenomenon occurs on the display, the screen is displayed in black, so that a character or an image can not be displayed, thereby causing a fatal problem that the display can not function as a display. Such a blackout phenomenon is known to occur mainly due to an increase in the front surface temperature of the display due to direct sunlight.

In addition, when the information display device is used outdoors, there is a possibility that the device may be broken due to inflow of water such as rainwater or foreign matter such as dust.

Currently, the power system of an outdoor information display device is cooled according to a cooling method using a fan or a cooling method using an air conditioner.

In the case of the cooling method using the fan, since the temperature inside the apparatus can not be made lower than the outside temperature, there is a problem that reliability in cooling the apparatus is lowered in a region where the temperature is high.

In addition, in the case of using the air conditioner, not only the manufacturing cost is increased but also condensation may occur inside the apparatus, space for the air conditioner is secured, design condition is restricted, Fatal problems can occur.

Korean Registered Patent No. 10-1597973 (registered date: February 22, 2016, name: electronic board device)

The present invention uses a heat radiating plate in contact with a heat generating surface of a thermoelectric element on the outside of a housing and uses an electromotive force generated by a thermoelectric element as a power source for driving a cooling fan for radiating heat of a heat radiating plate, , And a power system of an outdoor information display device capable of reducing power consumption.

Further, the present invention provides a power supply system for an outdoor information display device which can prevent the possibility of device failure due to inflow of water such as rainwater or the inflow of foreign matter such as dust.

According to an aspect of the present invention, there is provided a power supply system for an outdoor information display device, comprising: a display panel mounted on a front surface of a housing; a heat generating surface exposed to the outside through an opening formed in a rear surface of the housing; A cooling fan coupled to the heat radiating plate, and a power source to the thermoelectric module, wherein the heat conductive plate is disposed in the housing such that the cooling surface faces the display panel, the heat radiating plate is provided outside the housing in contact with the heat generating surface of the thermoelectric module, Wherein the thermoelectric module includes a plurality of thermoelectric modules each of which corresponds to a temperature difference between a cooling surface exposed to the internal air of the housing and a heating surface contacting the heat radiating plate when power is supplied under the control of the control unit Generates a current and provides the driving power for driving the cooling fan.

In the power supply system of the outdoor information display device according to the present invention, the heat transferred to the heat radiating plate provided on the outside of the housing through the heat generating surface of the thermoelectric module is discharged from the outside of the housing without being re- .

The power supply system of the outdoor information display apparatus according to the present invention may further include a temperature sensor for sensing the internal temperature of the housing and a switch provided between the thermoelectric module and the power supply unit, And when the temperature is equal to or lower than the predetermined temperature threshold value, the switch is turned off to stop power supply to the thermoelectric module.

The power supply system of the outdoor information display apparatus according to the present invention further comprises a current sensor installed between the thermoelectric module and the power unit for sensing the amount of current flowing into the thermoelectric module and a switch provided between the thermoelectric module and the power unit, When the amount of current transferred from the current sensor is equal to or greater than a preset current threshold, the switch is turned off to control the power supply to the thermoelectric module to be cut off.

In the power supply system of the outdoor information display apparatus according to the present invention, the cooling fan is provided with a waterproof function.

According to the present invention, a heat radiating plate in contact with a heat generating surface of a thermoelectric element is provided outside the housing, and the electromotive force generated by the thermoelectric element is used as a power source for driving a cooling fan for radiating heat of the heat radiating plate, There is an effect that an outdoor information display device capable of reducing power consumption can be provided.

In addition, there is an effect that an outdoor information display device capable of preventing the possibility of device failure due to inflow of water such as rainwater or the inflow of foreign matter such as dust or the like is provided.

1 is a functional block diagram of a power supply system of an outdoor information display apparatus according to an embodiment of the present invention,
2 is a conceptual sectional view of a power system of an outdoor information display apparatus according to an embodiment of the present invention,
3 is a diagram for explaining a specific operation of a power supply system of an outdoor information display apparatus according to an embodiment of the present invention.

It is to be understood that the specific structural or functional description of embodiments of the present invention disclosed herein is for illustrative purposes only and is not intended to limit the scope of the inventive concept But may be embodied in many different forms and is not limited to the embodiments set forth herein.

The embodiments according to the concept of the present invention can make various changes and can take various forms, so that the embodiments are illustrated in the drawings and described in detail herein. It should be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms disclosed, but includes all modifications, equivalents, or alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms may be named for the purpose of distinguishing one element from another, for example, without departing from the scope of the right according to the concept of the present invention, the first element may be referred to as a second element, The component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that no other element exists in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like are used to specify that there are features, numbers, steps, operations, elements, parts or combinations thereof described herein, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a functional block diagram of a power supply system of an outdoor information display apparatus according to an embodiment of the present invention, and FIG. 2 is a conceptual sectional view of a power supply system of an outdoor information display apparatus according to an embodiment of the present invention.

1 and 2, a power supply system of an outdoor information display apparatus according to an embodiment of the present invention includes a housing 5, a protective cover 10, a display panel 20, a thermoelectric module 30, 40, a cooling fan 50, a control unit 60, a temperature sensor 70, a switch 80, a current sensor 90 and a power supply unit 100.

The housing 5 is a means for receiving the components of the power system of the outdoor information display device and constituting the appearance of the device. In the drawings, the housing 5 is described as having a rectangular parallelepiped shape, but this is only an example, and the housing 5 may be configured to have various appearance as required. The front portion of the housing 5 is the housing 5 on the side where the display panel 20 is installed or the user is located and the rear portion of the housing 5 is the housing 5 on the opposite side, to be. The housing 5 has a front surface formed with an opening for exposing a screen provided by the display panel 20 to the user so as to have a shape corresponding to the shape of the display panel 20, An opening for exposing the heat generating surface of the thermoelectric module 30 to the outside is formed.

The protective cover 10 is installed in an opening formed in the front surface of the housing 5 and functions to protect components including the display panel 20 from external physical factors. The protective cover 10 may be made of various materials having a transparent material, for example, a glass may be applied as the protective cover 10.

The display panel 20 is built in the housing 5 in a state of being protected by the protective cover 10 and performs a function of visually providing information to the user under the control of the controller 60. The screen provided by the display panel 20 is exposed to a user through an opening formed in a front portion of the housing 5. [

The thermoelectric module 30 is installed in the housing 5 such that the heat generating surface is exposed to the outside through an opening formed in the rear portion of the housing 5 and the cooling surface opposite to the heat generating surface faces the display panel 20 .

When the power is supplied under the control of the controller 60, the thermoelectric module 30 generates a current corresponding to the temperature difference between the cooling surface exposed to the air inside the housing 5 and the heat generating surface contacted with the heat sink 40, And provides it as driving power for driving the cooling fan 50.

The heat sink (40) is provided outside the housing (5) in contact with the heat generating surface of the thermoelectric module (30).

The heat transferred to the heat sink 40 provided on the outside of the housing 5 through the heat generating surface of the thermoelectric module 30 is discharged from the outside of the housing 5 without flowing into the inside of the housing 5, The cooling efficiency is increased.

The cooling fan 50 is coupled to the heat sink 40. The cooling fan 50 is rotated by a driving operation of a driving means such as a motor supplied with current from the thermoelectric module 30 to radiate the heat of the heat radiating fan to the outside do. For example, the cooling fan 50 may be configured to have a waterproof and dustproof function.

The control unit 60 performs control operations for all components, including power supply control to the thermoelectric module 30. [

The temperature sensor 70 senses the internal temperature of the housing 5 and transmits the sensed temperature to the controller 60.

The switch 80 is provided between the thermoelectric module 30 and the power source unit 100 and is turned on and off under the control of the controller 60. [

The current sensor 90 is installed between the thermoelectric module 30 and the power source unit 100 and detects the amount of current flowing into the thermoelectric module 30 and transmits the detected current amount to the controller 60.

The power supply unit 100 is a means for supplying power to the components including the thermoelectric module 30 and the display panel 20. [

When the internal temperature of the housing 5 received from the temperature sensor 70 is equal to or lower than a predetermined temperature threshold value, the controller 60 turns off the switch 80 so that the power supply to the thermoelectric module 30 is interrupted . According to this configuration, it is possible to reduce unnecessary power consumption at a low temperature that does not require a cooling action.

As another example, when the amount of current transferred from the current sensor 90 is equal to or greater than a preset current threshold, the control unit 60 can turn off the switch 80 to control the power supply to the thermoelectric module 30 to be cut off. According to this configuration, it is possible to prevent the over-current from flowing into the thermoelectric module 30 and damaging the thermoelectric module 30. [

3 is a diagram for explaining a specific operation of a power supply system of an outdoor information display apparatus according to an embodiment of the present invention.

3, in step S10, a process of receiving an operation start command of the apparatus from the user is performed. For example, this process can be performed through a power button pressing operation or the like, and this command is transmitted to the control unit 60. [

In step S20, a process of controlling the controller 60 to supply power to the thermoelectric module 30 is performed. The cooling surface of the thermoelectric module 30 supplied with power is cold, and conversely, the heat surface, which is the opposite surface, becomes hot. Since the cooling surface is exposed to the inner space of the housing 5 in which the display panel 20 is installed, the inner space of the housing 5 and the display panel 20 start to cool through the cooling surface and heat transfer, The heat is radiated to the outside through the heat sink 40 because the heat sink 40 is in contact with the heat sink 40 provided outside the housing 5.

In step S30, a process is performed in which the thermoelectric module 30 generates a current corresponding to the temperature difference between the cooling surface and the heat generating surface.

In step S40, the driving unit for driving the cooling fan 50 receives the electric charge from the thermoelectric module 30 and operates the cooling fan 50.

In step S50, a process of sensing the internal temperature of the housing 5 by the temperature sensor 70 and transmitting the sensed temperature to the controller 60 is performed.

In step S60, the controller 60 determines whether the internal temperature of the housing 5 received from the temperature sensor 70 is lower than a predetermined temperature threshold. As a result of the determination in step S60, if the internal temperature of the housing 5 is lower than or equal to the preset temperature threshold, the process proceeds to step S70; otherwise, the process proceeds to step S80.

The control unit 60 turns off the switch 80 provided between the thermoelectric module 30 and the power source unit 100 to control the power supply to the thermoelectric module 30 to be cut off in step S70. Thus, unnecessary power consumption at a low temperature, which does not require a cooling action, can be reduced.

In step S80, a current sensor 90 installed between the thermoelectric module 30 and the power source unit 100 senses the amount of current flowing into the thermoelectric module 30 and transmits the sensed amount of current to the controller 60. [

In step S90, a process of determining whether or not the amount of current transferred from the current sensor 90 by the control unit 60 is equal to or greater than a preset current threshold value is performed. As a result of the determination in step S90, if the current amount is equal to or greater than the preset current threshold value, the process proceeds to step S100. Otherwise, the process proceeds to step S110.

In step S100, the control unit 60 turns off the switch 80 provided between the thermoelectric module 30 and the power source unit 100 to control the power supply to the thermoelectric module 30 to be cut off. Accordingly, the overcurrent flows into the thermoelectric module 30 and the thermoelectric module 30 can be prevented from being damaged.

In step S110, a process of receiving an operation termination command of the apparatus from the user is performed. For example, this process can be performed through an end button push operation or the like, and this command is transmitted to the control unit 60, and the control unit 60 terminates the entire operation of the apparatus according to this command.

As described in detail above, according to the present invention, a heat radiating plate in contact with a heat generating surface of a thermoelectric element is provided outside the housing and an electromotive force generated by the thermoelectric element is used as a power source for driving a cooling fan for radiating heat of the heat radiating plate There is an effect that an outdoor information display device capable of efficiently cooling the inside of the apparatus and reducing power consumption is provided.

In addition, there is an effect that an outdoor information display device capable of preventing the possibility of device failure due to inflow of water such as rainwater or the inflow of foreign matter such as dust or the like is provided.

5: Housing
10: Protective cover
20: Display panel
30: thermoelectric module
40: heat sink
50: Cooling fan
60:
70: Temperature sensor
80: Switch
90: Current sensor
100:

Claims (5)

A display panel installed in a front portion of the housing;
A thermoelectric module provided in the housing such that a heat generating surface is exposed to the outside through an opening formed in a rear portion of the housing and a cooling surface opposite to the heat generating surface faces the display panel;
A heat sink provided outside the housing in contact with the heat generating surface of the thermoelectric module;
A cooling fan coupled to the heat sink; And
And a control unit for controlling power supply to the thermoelectric module,
The thermoelectric module includes:
When the power is supplied according to the control of the controller, generates a current corresponding to a temperature difference between a cooling surface exposed to the air inside the housing and a heating surface contacting with the heat sink, thereby driving the cooling fan The power supply system of the outdoor information display device. The method according to claim 1,
Wherein the heat transmitted from the heat generating surface of the thermoelectric module to the heat radiating plate provided outside the housing is radiated from the outside of the housing without being re-introduced into the inside of the housing. The method according to claim 1,
A temperature sensor for sensing an internal temperature of the housing; And
Further comprising a switch provided between the thermoelectric module and a power source,
Wherein,
Wherein when the internal temperature of the housing received from the temperature sensor is equal to or lower than a preset temperature threshold, the switch is turned off to control the power supply to the thermoelectric module to be cut off. The method according to claim 1,
A current sensor installed between the thermoelectric module and the power unit to sense an amount of current flowing into the thermoelectric module; And
And a switch installed between the thermoelectric module and the power unit,
Wherein,
And controls the power supply to the thermoelectric module to be cut off by turning off the switch when the amount of current received from the current sensor is equal to or greater than a preset current threshold. The method according to claim 1,
Wherein the cooling fan is provided with a waterproof function.

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