JPH0323767Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an outdoor switchboard, and its purpose is to enable the electrical equipment housed in the switchboard to operate at any time, and to maintain the temperature at which it can continue to operate in the best possible condition. The purpose is to obtain a switchboard.

Conventionally, outdoor switchboards have been equipped with coolers, cooling fins, etc. to prevent the temperature inside the panel from rising due to external solar heat or heat generated by electrical equipment stored inside. In order to prevent the temperature inside the panel from dropping during shutdown, space heaters, thermostats, etc. were installed to prevent the temperature inside the panel from dropping.

However, all of these require paid energy such as a power source, and have the disadvantage that the operation cost of the outdoor switchboard becomes large.

The purpose of this invention is to eliminate these conventional drawbacks.By using a solar heat storage space heater that uses gas or liquid as a heat storage medium, there is no need for operating costs, and there is no need for internal storage. To provide an outdoor power distribution board that can always keep the temperature at a suitable operating temperature for electrical equipment.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Reference numeral 1 denotes a solar heat storage space heater, and the solar heat storage space heater 1 is constructed by storing a nonflammable gas or liquid heat storage medium having a large specific heat in a closed container.

As a heat storage medium having a large specific heat, for example, SF ₆ gas (specific heat 6.49×10 ² J/Kg·K) can be used as a gas, and silicon oil (specific heat 1.51×10 ³ J/Kg·K) can be used as a liquid.

Reference numeral 2 denotes an outdoor power distribution board, and solar heat storage space heaters 1 are mounted on the inner walls of the side panel 3, rear panel 4, ceiling panel 5, and door 6 of the outdoor power distribution panel 2, respectively.

In the above configuration, when the outdoor power distribution board 2 receives sunlight, the heat from the sunlight is stored in the solar heat storage space heater 1, and at the same time, the transmission of heat into the board is interrupted.

When the temperature outside the panel decreases due to sunset, etc., the solar heat stored in the solar heat storage space heater 1 is released into the outdoor power distribution board 2 by the convection of the heat storage medium in the container, and the temperature inside the outdoor power distribution board 2 decreases. This prevents a decrease in

In this example, solar heat storage space heaters were installed on all the inner walls of the outdoor switchboard, but the number and arrangement of the solar heat storage space heaters may vary depending on, for example, the state of sunlight irradiation and the outside air temperature. It is only necessary to set it appropriately according to the conditions at each installation location of the outdoor power distribution board (for example, only on the inner walls in the position directly irradiated with sunlight), and it is not necessary to provide it on all the inner walls of the outdoor power distribution board.

In addition, it is also possible to use a fixed heat storage medium in addition to gas or liquid, but this is not practical because convection within the container is not good and the weight of the entire outdoor switchboard becomes heavy. It is useless and cannot be used.

As described above, according to the present invention, the outdoor power distribution board is equipped with a solar heat storage space heater that uses gas or liquid as a heat storage medium on the inner wall of the surface irradiated with sunlight, thereby effectively utilizing the heat generated by sunlight irradiated during the day. At the same time, it prevents the temperature inside the panel from rising by blocking heat transfer into the panel, and even if the outside temperature drops due to sunset, etc., the solar heat stored in the solar heat storage space heater is transferred to the convection of the heat storage medium. As a result, it is naturally released into the panel, preventing the temperature inside the panel from dropping, and keeping the inside of the panel at the temperature necessary for the operation of electrical equipment.

In addition, the solar heat storage space heater of the present invention is
It does not require any special control for storage and release of thermal energy, and furthermore, because it uses sunlight as an energy source, it has practical effects such as operating costs equal to zero.

[Brief explanation of the drawing]

The figure is a sectional view of essential parts showing one embodiment of the present invention, in which 1 is a solar storage space heater, 2 is an outdoor switchboard, 3 is a side panel, 4 is a back panel, 5 is a ceiling panel, and 6 is a It's a door.

Claims (1)

[Scope of utility model registration request] In an outdoor power distribution board, a solar heat storage space heater using gas or liquid as a heat storage medium is installed on at least the inner wall of the side that is irradiated with sunlight among the side panels, back panel, ceiling board, and door that make up the power distribution board. Features an outdoor switchboard.