KR101633807B1 - Switching board with function of inner temperature controlling - Google Patents

Abstract

More particularly, the present invention relates to a switchgear having an internal temperature control function, and more particularly, to a switchgear having an internal temperature control function, which continuously discharges heat generated in the switchgear during operation of the switchgear to optimize the temperature inside the switchgear, And an internal temperature control function capable of increasing the service life.
According to an aspect of the present invention, there is provided a switchboard having an internal temperature control function, the switchboard being installed inside the switchboard and detecting an internal temperature of the switchboard; An exhaust unit for exhausting the air inside the switchgear to the outside; A temperature controller for outputting a driving signal for controlling the speed of the exhaust fan of the exhaust unit based on the internal temperature detected by the temperature detector; And an inverter unit for applying power to the exhaust unit according to a driving signal outputted from the temperature control unit. The temperature control unit outputs a driving signal so that the exhaust fan of the exhaust unit rotates at least minimum.

Description

{SWITCHING BOARD WITH FUNCTION OF INNER TEMPERATURE CONTROLLING}

More particularly, the present invention relates to a switchgear having an internal temperature control function, and more particularly, to a switchgear having an internal temperature control function, which continuously discharges heat generated in the switchgear during operation of the switchgear to optimize the temperature inside the switchgear, And an internal temperature control function capable of increasing the service life.

The switchgear is a facility for receiving and distributing power of extraordinary high voltage in the state of being installed on the side of power consumers such as apartments, buildings, factories and substations, and it is equipped with load switchgear, switchgear, breaker and protective relay inside.

Such a switchboard is operated and maintained in a state where the internal space is shielded from the outside to protect various electric devices installed inside the enclosure and to prevent a safety accident.

However, in the process of distributing the electric power supplied from the outside, such a switchgear generates heat from various electric devices installed therein. In addition, in the case of an outdoor type outdoor switchboard installed outside, the temperature rise inside the enclosure due to solar heat is further accelerated.

As a result, when the temperature inside the switchgear increases, problems such as deterioration of the electric equipment and an increase in the resistance of the cable (bus bar, etc.) occur.

In particular, when the resistance of the cable increases, the allowable current decreases, and the decrease of the allowable current causes deterioration of the electric equipment and arcing, which causes secondary accident.

In order to solve the above problems, Japanese Patent Application Laid-Open No. 10-1239761 discloses a switchboard with anti-salt and automatic internal temperature control function.

The above-described technique includes several blowing fans for external air sucking operation in response to output signals of inverters; A plurality of blowing fans for internal air discharge, which are provided at the upper portion of the main body of the switchgear and are rotated in response to the output signals of the inverters under the control of the control unit; A temperature detection sensor for detecting the temperature in the power transmission / reception panel in real time and transmitting the detected temperature to the control unit; A plurality of intake air quantity detection sensors respectively installed at the outlet ducts of the air discharge ducts of the blowing fans for external air suction, respectively, for detecting the amounts of intake air of the blowing fans by electric signals and delivering them to the control unit; A display unit for displaying the temperature inside the main body, the driving state of the blowing fans, and the state information of the anti-salt filter in response to the output signal of the control unit in a state where the main body is installed outside the main body of the switchgear; A control unit having a predetermined control program and performing overall control functions of the system; And a plurality of blower fan driving units for operating the inverters in response to the output signal of the control unit to control the driving of the blower fan for sucking the outside air and the blower fans for discharging the inside air.

When the control unit that performs the control function detects a value equal to or higher than the predetermined temperature, the exhaust fan and the blower fan are driven based on the detected temperature, When the value is detected, the driving of the exhaust fan and the blowing fan is stopped. The driving of the exhaust fan and the blowing fan is controlled according to the set value.

In the above configuration, the internal capacity of the switchgear varies depending on the receiving voltage (capacity) and the distribution voltage (capacity), but the amount of air contained in the interior due to the volume occupied by the structure, When the exhaust fan and the blower fan are driven according to the voltage detected temperature, the time for reaching the set target temperature becomes very short. Also, since the amount of air inside the switchgear is small, the time for restarting the exhaust fan and the blower fan is short. That is, the on / off operation cycle of the exhaust fan and the blower fan is short, and this operation cycle increases the mechanical fatigue of the exhaust fan and the blower fan, and shortens the operating life.

KR 10-1239761 B1 (2013. 02. 27.)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the related art, and an object of the present invention is to provide a system and method for continuously discharging a temperature that is naturally increased in accordance with operation of a power plant by continuously operating an exhaust fan, And to provide an interior temperature control function with an internal temperature control function capable of maintaining the temperature below the temperature.

Another object of the present invention is to provide an interior and exterior panel having an internal temperature control function for confirming whether or not an exhaust fan is faulty by visually observing the operation of the exhaust fan.

According to an aspect of the present invention, there is provided a switchboard having an internal temperature control function, the switchboard being installed inside the switchboard and detecting an internal temperature of the switchboard; An exhaust unit for exhausting the air inside the switchgear to the outside; A temperature controller for outputting a driving signal for controlling the speed of the exhaust fan of the exhaust unit based on the internal temperature detected by the temperature detector; And an inverter unit for applying power to the exhaust unit according to a driving signal outputted from the temperature control unit. The temperature control unit outputs a driving signal so that the exhaust fan of the exhaust unit rotates at least minimum.

Here, the minimum rotation is determined by the operation of the switchgear, the capacity for the internal volume of the switchgear, the number distribution capacity of the switchgear, and the external temperature.

Further, the air conditioner may further include a suction unit for drawing air outside the switchgear, wherein the temperature control unit drives and controls the suction fan of the suction unit to rotate at least to a minimum.

According to the present invention, the driving of the exhaust fan is continuously performed, but the temperature of the interior of the switchgear can be kept below the set temperature by varying the speed according to the temperature change.

Further, as the exhaust fan is continuously driven, the mechanical fatigue due to on / off of the exhaust fan can be reduced to prolong the service life of the exhaust fan. When the exhaust fan is floating, Therefore, it is easy to check the failure of the exhaust fan, and it is possible to maintain an optimal internal temperature of the power plant due to the maintenance of the exhaust fan.

1 is a perspective view of a switchboard having an internal temperature control function according to the present invention;
2 is a cross-sectional view illustrating an internal configuration of a switchboard having an internal temperature control function according to the present invention;
3 is a schematic configuration diagram of a switchboard having an internal temperature control function according to the present invention;

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

The present invention relates to a control panel having an internal temperature control function capable of increasing the operating life of an exhaust fan for discharging heat while discharging the continuous heat generated in the interior of the control panel will be.

FIG. 1 is a perspective view of a switchboard having an internal temperature control function according to the present invention, FIG. 2 is a cross-sectional view illustrating an internal configuration of a switchboard having an internal temperature control function according to the present invention, Fig. 2 is a schematic diagram showing a configuration of a switchboard having a temperature control function; Fig.

1 and 3, a switchboard having an internal temperature control function according to the present invention includes a temperature detection unit 10, an exhaust unit 20, a temperature control unit 30, an inverter unit 40, a suction unit 50, an alarm unit 60, and a duct 70.

The temperature detecting unit 10 detects and outputs the temperature inside the switchgear, and includes a temperature detecting sensor and a temperature detecting module.

Depending on the design conditions, the temperature detector 10 may include a plurality of temperature sensors so as to detect not only the internal temperature of the switchboard but also the external temperature of the switchboard. At this time, The data can be configured to be output respectively.

The exhaust unit 20 may include an exhaust fan and an exhaust motor for driving the exhaust fan to exhaust the air inside the switchgear to the outside.

At this time, the exhaust fan and the exhaust motor constituting the exhaust unit 20 may be constituted by one module and may be installed on the outer upper panel of the switchboard. That is, the exhaust unit 20 may be installed on the upper part where the heated air is collected to increase efficiency of heat discharge.

The temperature control unit 30 outputs a driving signal for controlling the exhaust fan speed of the exhaust unit based on the internal temperature detected by the temperature detection unit, and a temperature control program can be installed.

The temperature control unit 30 of the present invention outputs a driving signal for controlling the driving speed, that is, the rotational speed of the exhaust fan, not the configuration for turning on / off the driving of the exhaust unit 20. [ Further, the rotation of the exhaust fan is continuously performed, but the rotation speed is variable.

Inside the switchboard, there are various electric devices for transforming the received power to an appropriate voltage for distribution. For example, there are various devices such as a transformer T, a bus bar, a circuit breaker, a disconnecting device, a power factor compensator, and a power control device, which are different in configuration according to the number distribution power. . Accordingly, operation of the switchboard raises the internal temperature naturally.

Accordingly, in accordance with the present invention, the exhaust unit is continuously driven so as to continuously discharge the inside air of the switchgear in response to the temperature naturally rising.

Here, as the factors raising the internal temperature of the switchboard, not only the electric equipment installed in the interior of the switchgear but also the temperature raised by the volume (size) of the switchboard, the received power received and the distribution power capacity are different . In addition, when the switchboard is exposed to the outside, it can also be raised by the external temperature caused by the sunlight.

Accordingly, the temperature control unit 30 outputs a driving signal so that the exhaust fan of the exhaust unit 20 rotates at least at least in consideration of the temperature of the rising air, so that the heated air is continuously discharged by the operation of the exhaust fan So that the temperature of the air in the switchboard does not rise above a certain temperature.

At this time, the minimum speed at which the exhaust fan of the exhaust unit 20 rotates may be set to such a degree that the temperature of the air is not elevated inside the switchgear. This condition may be determined by the operation of the switchgear, the capacity with respect to the internal volume of the switchgear , The number distribution capacity of the switchboard, and the external temperature. More preferably, the exhaust speed of the exhaust fan (discharge capacity per minute), so that the minimum speed is set.

The temperature controller 30 may be configured to set the minimum rotational speed of the exhaust fan by applying such a condition.

On the other hand, sudden temperature changes may occur inside and outside the switchgear. For example, the air inside the switchgear can be raised by a cause such as deterioration due to arc or an increase in ambient temperature due to sunlight. In this case, the temperature rise due to the external and external abnormalities may be higher than the temperature decrease due to the heated air discharged by the minimum rotational speed of the exhaust fan.

Of course, although the temperature rise can be made gradually by driving the exhaust fan continuously, if the temperature rise due to the abnormal phenomenon is higher than the temperature decrease due to the air discharge, the internal temperature of the switchboard can be increased as a result. Therefore, the temperature control unit 30 may be configured to control the exhaust fan to be driven at a rotational speed higher than the minimum rotational speed when the detection temperature inside the switchgear exceeds the set temperature.

That is, the temperature control unit 30 outputs a driving signal for rotating the exhaust fan at the minimum rotational speed when the temperature is lower than a predetermined temperature, and outputs a driving signal for rotating the exhaust fan in proportion to the difference between the set temperature and the detected temperature And can be configured to be controlled so as to continuously raise the rotation speed of the fan to appropriately discharge the heated air. At this time, the rotational speed of the exhaust fan increases in proportion to the difference between the set temperature and the detected temperature, but the maximum rotational speed of the exhaust fan is configured to be within the maximum rotational speed range of the exhaust motor that drives the exhaust fan.

The inverter unit 40 applies power to the exhaust unit according to a driving signal outputted from the temperature control unit 30 and converts the applied commercial power into a usable power in the exhaust unit 10, And controls the magnitude of the current based on the driving signal output from the temperature control unit 30.

The suction unit 50 is for supplying outside air to the inside of the switchgear by drawing air outside the switchgear to the inside of the switchgear, and may be provided on one side of the lower portion of the switchgear.

The suction unit 50 may include a suction fan and a suction motor for driving the suction fan. The suction unit 50 may be operated by a driving signal output from the temperature control unit 30.

When the intake unit 50 is configured to be operated by the drive signal outputted from the temperature control unit 30, the intake fan of the suction unit 50 is controlled to be at least minimum such as the exhaust unit 10, And more specifically, may be configured to equalize the amount of exhaustion due to the driving of the exhaust part 10 and the amount of suction of the suction part 50 by driving.

The alarm unit 60 generates an alarm signal according to the control signal of the temperature control unit 30, and may include a speaker for outputting an alarm sound or a visually identifiable light lamp.

When the detected temperature rises continuously due to an abnormal phenomenon inside or outside the switchboard and the temperature rises to the minimum temperature that can cause an error in the electrical equipment installed inside the switchgear due to the temperature rise, (60) to provide a visual and / or audible notification to the user.

If the minimum temperature that can cause an error in the electric apparatus is a temperature higher than the set temperature (the temperature at which the exhaust fan rotates at minimum) and a temperature close to the minimum temperature that may cause an error in the electric apparatus is detected The temperature control unit 30 rotates the exhaust unit 10 and the suction unit 50 at a maximum speed.

That is, in the case where the temperature of the exhaust part 10 and the suction part 50 is constantly increased even when the suction part 50 rotates at the maximum speed and the air is sucked and exhausted, it is necessary to generate an alarm signal to inform the outside .

In the above, at least one of the exhaust part or the suction part may be caused by a driving error or by an external or internal abnormality such as deterioration or surge.

The duct 70 is a pipe for guiding the heat generated in the main electric equipment installed in the power plant to the exhaust unit 20 and may include a hopper 71 installed on the suction side. At this time, the main electric device may be a transformer T. The transformer (T) is a device used to step up or down the voltage by using the mutual induction principle. The maximum allowable temperature is applied differently depending on the type. For example, when using insulating oil in an inflow transformer, a temperature rise limit of 55 ° C is applied to the transformer in the case of non-contact with outside air, which is the temperature at which the ambient temperature is excluded. That is, when the ambient temperature of the transformer (internal temperature of the switchboard) is 40 ° C, the temperature rise limit of the transformer with respect to the above type is 95 ° C.

Accordingly, in the present invention, it is possible to lower the ambient temperature of the transformer by constructing the duct 70 that forcibly induces the air in direct contact with the transformer and discharges the air through the exhaust unit 20, It is possible to keep the transformer in an optimal state and to operate the transformer in a healthy state. The air coming into contact with the transformer T can be sucked up to the exhaust part 20 side by the hopper 71 provided on the intake side of the duct 70 as much as possible.

According to the present invention, since the driving of the exhaust fan is continuously performed, the mechanical fatigue caused by the on / off of the exhaust fan can be reduced to prolong the service life of the exhaust fan. In the floating state of the exhaust fan, It is possible to easily check the failure of the exhaust fan. Accordingly, it is possible to maintain the internal temperature of the power plant due to the maintenance of the exhaust fan at an optimal level and to continuously change the speed according to the temperature change while continuously driving the exhaust fan It is possible to maintain the internal temperature of the switchboard below the set temperature.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: Temperature detection unit 20:
30: Temperature control unit 40: Inverter unit
50: Suction section 60: Alarm section
70: duct 71: hopper

Claims (3)

In a switchboard having an internal temperature control function,
A temperature detection unit having a plurality of temperature detection sensors for detecting temperature inside and outside the switchgear and outputting temperature data of the inside and the outside of the switchgear detected by the temperature detection sensor;
And an exhaust motor for driving the exhaust fan and the exhaust fan to discharge the air inside the switchgear to the outside, wherein the exhaust fan and the exhaust motor are installed on the outer upper panel of the power plant with one module An exhaust part;
A temperature controller for outputting a driving signal for continuously rotating the exhaust fan of the exhaust unit based on the internal temperature detected by the temperature detector, and controlling the rotation speed to be variable;
An inverter unit for applying power to the exhaust unit according to a driving signal outputted from the temperature control unit, and converting the applied commercial power into a power source usable in the exhaust unit;
And a suction motor for driving the suction fan and the suction fan so as to supply air outside the switchgear to the inside of the switchgear and supply outside air to the inside of the switchgear and is operated by a drive signal outputted from the temperature controller, A suction unit configured to have the same amount of exhaust and suction as the exhaust unit is driven; And
An alarm signal is generated in accordance with the control signal of the temperature control unit and the detected temperature rises continuously due to an abnormal phenomenon in the interior and exterior of the switchgear and rises to a minimum temperature that can cause an error in the electric equipment installed inside the power- An alarm unit for generating an alarm signal when the temperature continuously increases even when the exhaust unit and the suction unit are driven at the maximum speed to exhaust air and suck air;
And,
The temperature control unit includes:
A control unit configured to control the exhaust fan to be driven at a rotational speed higher than a minimum number of rotations when the detection temperature inside the switchgear unit is equal to or higher than a predetermined temperature, and to output a driving signal at least at least to rotate the exhaust fan of the exhaust unit continuously The exhaust fan is rotated at a speed lower than the set temperature by a minimum rotation speed, and the rotation speed of the exhaust fan is continuously increased in proportion to the difference between the set temperature and the detected temperature So that air can be discharged,
The minimum speed at which the exhaust fan rotates is determined by the following equation
A capacity for the internal volume of the switchgear, a number distribution capacity of the switchgear, an external temperature, and a discharge capacity per minute of the exhaust fan,
A duct having a hopper installed on a suction side for guiding heat generated in an electric device installed in the power transmission /
Wherein the duct forcibly induces air in direct contact with the transformer and discharges the air through the exhaust to lower the ambient temperature of the transformer, and the hopper sucks the air in contact with the transformer and guides the air to the exhaust part side. The switchboard with.
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