US-12627122-B2 - Switchboard provided with cooling unit

US12627122B2US 12627122 B2US12627122 B2US 12627122B2US-12627122-B2

Abstract

A switchboard having a cooling unit is provided. The switchboard having the cooling unit according to an embodiment of the present disclosure may include a housing having an inner space, an air inlet formed at one side thereof, and an air outlet formed at the other side thereof; a heat source disposed at one side of the inner space; a cooling unit for introducing an external air through the air inlet to the inside of the housing and discharging an air of the inner space through the air outlet to the outside of the housing; and a support plate disposed in the inner space and coupled to the cooling unit to allow the cooling unit to enter and exit the inner space.

Inventors

Han Young KANG
Bong Jun SONG
Yo Hwan KIM
Seog Won LEE

Assignees

LS ELECTRIC CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20211125
Priority Date: 20210421

Claims (9)

1 . A switchboard comprising: a housing having an inner space, an air inlet formed at one side thereof, and an air outlet formed at another side thereof; a heat source disposed at one side of the inner space; a support plate disposed in the inner space; a cooling unit configured to introduce an external air through the air inlet into the inner space of the housing and discharge an exhaust air from the inner space through the air outlet to an outside of the housing, the cooling unit comprising: a case having a bottom unit and a front wall formed at a front side of the bottom unit; a case handle formed at a front side of the front wall; a cooling fan disposed at one side of an upper surface of the bottom unit so as to form a flow of the external air into the inner space; and a terminal protruding rearwards from a rear surface of the case to be electrically connectable to a power source inside the housing, wherein the cooling unit is coupled to the support plate to enter and exit the inner space; a coupling unit for guiding the bottom unit to slide forward and backward on an upper surface of the support plate; and a movement adjusting unit for adjusting a sliding motion of the bottom unit, wherein the movement adjusting unit comprises: a first bracket disposed at one side of the front wall of the bottom unit, a rotating shaft coupled to the first bracket so as to be rotatably disposed in a forward and backward direction and having a screw thread formed on an outer circumferential surface thereof, a screw rack disposed on the upper surface of the support plate so as to couple to a lower side of the screw thread, and a detachable handle detachably coupled to the front side of the bottom unit to rotate the rotating shaft, wherein an opening is formed through the bottom unit, one side of the screw thread of the rotating shaft protrudes below the bottom unit through the opening and is coupled to the screw rack, and wherein the terminal is electrically connected to the power source inside the housing when the screw rack is positioned at a front end of the screw thread by rotating the detachable handle in one direction, and the terminal is separated from the power source when the screw rack is disengaged from a rear end of the screw thread by rotating the detachable handle in an opposite direction.
2 . The switchboard of claim 1 , wherein the coupling unit comprises: at least one slide fixed to a lower surface of the bottom unit of the case; and at least one guide disposed on the upper surface of the support plate and including a lift limiting unit for guiding the at least one slide forward and backward and restricting a rising of the at least one slide.
3 . The switchboard of claim 2 , wherein the coupling unit further comprises: a stopper formed at a rear side of the at least one guide so as to prevent the at least one slide from deviating backward.
4 . The switchboard of claim 1 , further comprising: a state displaying unit for displaying a position of the bottom unit; wherein the state displaying unit comprises: a first gear disposed at a front side of the rotating shaft; a second bracket disposed at a front side of the first bracket; and a second gear coupled to the second bracket so as to engage with the first gear and rotate, wherein on a front side of the second gear, a first region disposed on an upper side of the second gear in a state in which the bottom unit is disposed inside the housing and a second region disposed on the upper side of the second gear in a state in which the bottom unit protrudes forward by the screw thread is provided.
5 . The switchboard of claim 4 , wherein the front wall of the case comprises: a transparent unit for checking the first region or the second region through the front wall.
6 . The switchboard of claim 1 , wherein the cooling unit further comprises: a temperature sensor fixed to the bottom unit so as to be disposed near the heat source; and a controller for controlling an output of the cooling fan depending on a temperature measured by the temperature sensor.
7 . The switchboard of claim 6 , wherein the controller is configured to: operate the cooling fan in a low output mode when the temperature measured by the temperature sensor is higher than or equal to a first temperature and less than a second temperature, operate the cooling fan in a medium output mode when the temperature measured by the temperature sensor is higher than or equal to the second temperature and less than a third temperature, and operate the cooling fan in a maximum output mode when the temperature measured by the temperature sensor is higher than or equal to the third temperature.
8 . The switchboard of claim 7 , wherein the first temperature, the second temperature, and the third temperature are 70 degrees Celsius, 80 degrees Celsius and 100 degrees Celsius, respectively, wherein in the low output mode, the controller operates the cooling fan at 60% of a maximum output of the cooling fan, in the medium output mode, the controller operates the cooling fan at 80% of the maximum output of the cooling fan, and in the maximum output mode, the controller operates the cooling fan at the maximum output.
9 . The switchboard of claim 1 , wherein the heat source is a power breaker.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application is a National Stage of International Application No. PCT/KR2021/017492 filed on Nov. 25, 2021, which claims priority to and the benefit of Korean Utility Model Application No. 10-2021-0051686, filed Apr. 21, 2021, the disclosures of which are incorporated herein by reference in its entirety. FIELD The present disclosure relates to a switchboard having a cooling unit. BACKGROUND The switchboard mainly plays a role in receiving high-voltage power supplied by power producers in large facilities such as buildings and factories, converting it into voltage usable in the facility, and distributing it to distributing board installed in a distributed manner through main lines. To this end, various electric devices such as breakers and current transformers are accommodated and used in switchboards for operation or control of a power plants and substations, and for operation of electric motors. At this time, the electric devices used in the switchboard may inevitably generate heat during operation. Particularly, recently, as the large capacity and density of the switchboard progresses, the amount of heat generated by the electric devices disposed in the switchboard is getting higher. Accordingly, a fan is used to control the flow so that external air is sucked in inside the switchboard to cool the heat source area inside the switchboard and then discharged. However, when a filter is used, foreign substances accumulate in the filter over time, and the differential pressure increases, so that an appropriate flow rate is not generated. Therefore, the filter need to be replaced or cleaned. In this case, the conventional switchboard does not separately divide the power supplied to the switchboard and the power supplied to the cooling unit, so that there is an inconvenience that maintenance work for the cooling configuration should be performed while the operation of the switchboard is stopped by blocking the power to the cooling unit. Accordingly, there is a need for a switchboard capable of easily separating the cooling unit from the switchboard and performing maintenance even when the switchboard is in operation. Meanwhile, in the case of the conventional switchboard, the power supplied to the switchboard and the power supplied to the cooling unit are common, and even when the temperature inside the switchboard is not high, the cooling unit is continuously used, thereby reducing the durability of the cooling unit. SUMMARY An object of the present disclosure is to provide a switchboard having a cooling unit capable of separating and maintaining the cooling unit even when the switchboard is in operation. Another object of the present disclosure is to provide a switchboard having a cooling unit in which a user can easily separate the cooling unit from the switchboard. In addition, an object of the present disclosure is to provide a switchboard having a cooling unit in which a user can easily check the extent to which the cooling unit is separated from the switchboard. Another object of the present disclosure is to provide a switchboard having a cooling unit capable of operating the cooling unit depending on a temperature of the switchboard. The objects of the present disclosure are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below. To solve the above problems, a switchboard having a cooling unit according to one aspect of the present disclosure may include: a housing having an inner space, an air inlet formed at one side thereof, and an air outlet formed at the other side thereof; a heat source disposed at one side of the inner space: a cooling unit for introducing an external air through the air inlet to the inside of the housing and discharging an air of the inner space through the air outlet to the outside of the housing; and a support plate disposed in the inner space and coupled to the cooling unit to allow the cooling unit to enter and exit the inner space. In this case, the cooling unit may include: a case having a bottom unit and a front wall formed at a front side of the bottom unit: a handle formed at a front side of the front wall: a cooling fan disposed at one side of an upper surface of the bottom unit so as to form air flow in the inner space, wherein the switchboard further including: a coupling unit for guiding the bottom unit to slide forward and backward on an upper surface of the support plate. In this case, the coupling unit may include at least one slider fixed to a lower surface of the bottom unit of the case; and at least one guide disposed on an upper surface of the support plate and including a lift limiting unit for guiding the slider forward and backward and restricting an rising of the slider. In this case, coupling unit may further include: a stopper formed at a rear side of the guide so as to prevent the slider from deviating bac