KR20210057512A - Electric charge saving device for interior lighting equipment - Google Patents

Abstract

The present invention relates to an electric charge-saving device for interior lighting using sunlight in which power stored by solar power is used as an auxiliary to interior lighting, such as outdoor signage in restaurants or shopping malls or indoor and outdoor lighting, etc., that uses a lot of power at night, so as to reduce costs of using commercial power. To this end, the electric charge-saving device for interior lighting according to the present invention includes: a solar power supply unit (10) for supplying power generated using sunlight; a commercial power supply unit (20) for supplying commercial power; a switching unit (30) for selectively supplying the output voltages of the solar power unit (10) and the commercial power unit (20) to a load (60); and a control unit (40) for controlling the charging and discharging of the solar power supply unit (10) and sensing the charging voltage of the solar power supply unit 10 to control the switching of the switching unit (30).

Description

Power usage cost reduction device for interior lighting {ELECTRIC CHARGE SAVING DEVICE FOR INTERIOR LIGHTING EQUIPMENT}

The present invention relates to a power usage cost saving device that can reduce the power usage cost of a load that uses power mainly at night. More specifically, power is mainly used at night, such as outdoor signage or indoor/outdoor lighting such as a restaurant or shopping mall. The present invention relates to a power usage cost reduction device for interior lighting using solar light, which allows the use of the power stored by solar power generation as a supplement to the interior lighting that is used a lot, thereby reducing the charge for the use of commercial power.

In Korea, which imports most of the raw materials to produce electricity, such as gas, crude oil, and bituminous coal, from foreign countries, capital outflows from the import of energy raw materials account for a large proportion. Accordingly, many energy-poor countries experiencing energy shortages are conducting research and development such as various energy saving campaigns for energy reduction and various smart grid technologies for energy saving. As fossil fuels are very concerned about air pollution, OECD countries around the world are rapidly strengthening emission regulations such as carbon dioxide, fine dust, and automobile emissions.

In particular, large-scale nuclear accidents, such as the accident at the Fukushima nuclear power plant in nearby Japan, are highly likely to continue to occur in the future. The central government has proposed various energy saving policies to solve this problem.

In this regard, research and development on various commercialization technologies for new and renewable energy are being actively conducted. A photovoltaic power generation device, one of the new and renewable energies, is generally configured to have a light collecting plate inclined toward the sun on the front of a box-type body, and a solar panel installed under the light collecting plate to generate power by condensed light, The main body has a structure in which a battery for storage and an inverter electrically connected to the solar panel, and a controller for controlling power supply are installed.

In such a solar power generation device, the DC power generated from the solar panel is stored in a battery for storage, or converted into AC power that can be supplied to the load or transmission line through an inverter, and the converted AC power is converted back to DC power. It brings the hassle and energy loss of the conversion.

However, when the solar power generation device is used for interior lighting that uses a lot of power at night, such as outdoor signboards or indoor/outdoor lighting such as catering companies or shopping malls, DC power is used as AC power, and AC power is converted to DC power. The hassle and inefficiency resulting from the conversion will increase the labor cost ratio and increase the construction cost, putting a burden on the owners who want to reduce the minimum cost.

Korean Patent Registration Publication No. 10-2030138 (announced on October 08, 2019) Korean Patent Registration Publication No. 10-1119522 (announced on February 28, 2012)

In view of the above circumstances, the present invention is to consider that a food service company operating at night mainly uses power for driving outdoor signboards or indoor lighting at night, so that power generation by using sunlight during the day is applied to the battery for storage. By charging it and supplying it to outdoor signboards or indoor lighting at night, it will reduce the expansion of power generation facilities or nuclear power plants that use fossil fuels, reduce power usage fees for catering companies that use a lot of power at night, and reduce construction costs. The technical task is to provide a device for reducing power usage costs for interior lighting that has been made possible.

In order to solve the above problems, the power usage cost reduction device for interior lighting of the present invention is a solar cell array that generates electricity using sunlight, and stabilizes and outputs DC electricity generated by the solar cell array to a predetermined voltage level. Solar power consisting of a DC/DC regulator, a storage battery that stores DC power output from the DC/DC regulator, and a DC/DC converter that converts DC power output from the storage battery into a DC voltage of a predetermined level and outputs it. The output power of the battery by the DC/DC converter is input to the power generation unit and one input terminal, and the output power of the commercial power supply unit is connected to the other input terminal to selectively output the output power of the battery for storage and the output power of the commercial power supply unit. When the power supply request is received from the load side, the switching unit determines the charge amount of the storage battery, and when the charge amount is higher than a predetermined charge amount, the switching unit outputs the battery output power, while the switching unit outputs the battery output power when it is less than a predetermined charge amount. It comprises a control unit for controlling the switching to output the output power.

The control unit is further connected to a charging voltage sensing unit that senses the amount of charge of the storage battery and transmits it to the main controller.

The switching unit is further connected to a distributor that distributes input power to different rated DC voltages and supplies them to outdoor signage, indoor lighting, and outdoor lighting using different levels of DC voltage, respectively.

As described above, the present invention allows a food service company that uses a lot of power at night to use the power charged by using sunlight during the day, thereby reducing the cost of using commercial power, and reducing the amount of commercial power used by customers to generate power generation facilities. It is possible to reduce the use of additional facilities related to, and in the summer when the amount of power use is high, the amount of solar power generation is rather increased, which can help to reduce power shortages.

In addition, the present invention has the advantage of storing a DC power generated using sunlight as a stabilized voltage through a DC/DC regulator and then supplying it to an outdoor signboard, indoor/outdoor lighting lamp, or an emergency lamp.

In particular, considering that most of the recently installed outdoor signboards and indoor/outdoor lighting are LEDs, the power supply system is relatively smooth compared to existing facilities, and accordingly, there is an advantage of lowering the interior construction cost.

1 is a configuration diagram according to the present invention,
2 is a flow chart illustrating a charging method according to the present invention,
3 is a flowchart illustrating a method of supplying power to a load side according to the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. This embodiment is provided to more completely describe the present invention to those with average knowledge in the art, and detailed descriptions of known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted. .

Since the embodiments according to the concept of the present invention can apply various changes and have various forms, the embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

1 shows a configuration diagram according to the present invention.

The power usage cost reduction device for interior lighting according to the present invention includes a photovoltaic power supply unit 10 for supplying power generated by using sunlight, a commercial power supply unit 20 for supplying a commercial power supply, and the photovoltaic power supply unit 10 And a switching unit 30 that selectively supplies the output voltage of the commercial power supply unit 20 to the load 60, and controls the charging/discharging of the solar power unit 10 and the charging voltage of the solar power unit 10 It includes a control unit 40 that senses and controls the switching of the switching unit 30.

The solar cell array 11 of the solar power supply unit 10 is formed by regularly arranging a plurality of solar cells, and each solar cell is composed of a set of N-type semiconductors and P-type semiconductors. It is configured to generate electricity by the photovoltaic effect through which current flows.

In addition, the solar cell array 11 is installed at a high place such as a rooftop of a building where sunlight is well lit, and the solar cell array 11 is installed to move along the sun while facing the sun direction from sunrise to sunset. It is preferable to be installed to increase the power generation efficiency by allowing the solar light to be incident efficiently.

A DC/DC regulator 12 may be additionally connected to the output side of the solar cell array 11, and the DC/DC regulator 12 converts the electric energy generated from the solar cell array 11 into a storage battery ( It functions to output by adjusting it to a constant DC voltage required for charging 14).

The charge/discharge control unit 13 charges the DC voltage output as a constant voltage from the DC/DC regulator 12 into the storage battery 14 or the external load 60 under control of the control unit 40 to be described later. It functions to output the DC voltage required for driving. That is, the charge/discharge control unit 13 controls the charge/discharge of the storage battery 14 through a predetermined program executed by the main controller 41 of the control unit 40, and in particular, the charge voltage detection unit 42 Charge/discharge is controlled according to information on the charge voltage and charge amount of the storage battery 14 sensed by ). On the other hand, although not shown in the drawing, the charging voltage sensing unit 42 detects information on the current voltage, current, or temperature of the storage battery 14 and transmits the information to the main controller 41, so that the main controller 41 ), based on this, information on the amount of charge of the storage battery 14 can be detected.

The storage battery 14 has a long lifespan and high energy density, so that a large capacity power source can be charged in a relatively small volume. As a battery having high efficiency and high output, for example, a lithium ion battery may be used.

A DC/DC converter 15 is connected to the output side of the storage battery 14 to convert the DC voltage output from the storage battery 14 into a DC voltage of a predetermined level required by the load side and output it. .

On the other hand, unlike the output power on the storage battery side supplied from the solar power unit 10, the rectifier 22 is connected to the commercial power supply unit 21 that is drawn in from a power supply institution such as a power plant that supplies commercial power. A commercial power supply unit 20 is provided.

The rectifying unit 22 of the commercial power supply unit 20 serves to rectify the AC voltage introduced through the commercial power supply unit 20 into a DC voltage and convert it into a DC voltage of a predetermined level required by the load.

The switching unit 30 is connected to each input the output power of the battery-side for storage supplied from the solar power unit 10 and the output power of the commercial power supply supplied from the commercial power supply unit 20, respectively, and the switching unit 30 is Switching action to selectively output the output power of the storage battery side supplied from the solar power unit 10 or the output power of the commercial power supply supplied from the commercial power supply unit 20 according to the control signal input from the control unit 40 Do it.

On the other hand, the control unit 40 selectively outputs the output power of the battery-side for storage supplied from the solar power unit 10 and the output power of the commercial power supply supplied from the commercial power supply unit 20 by controlling the switching unit 30 In particular, when the switching of the switching unit 30 is controlled, it is controlled according to information on the amount of charge of the storage battery 14 sensed through the charging voltage detection unit 42.

That is, when power is not mainly used in the daytime, but an interior lighting such as an outdoor signboard or indoor/outdoor lighting such as a restaurant company or a shopping mall that is used at night is used as the load 60, the controller 40 is a solar power supply unit ( 10) is controlled to charge power to the storage battery during the day, and at night when power is used by the load 60, the switching unit 30 is controlled to supply the charging power of the storage battery 14 to the load ( It is made to be supplied to 60) side. Of course, even when the load 60 needs to use power during the day, the control unit 40 can control the switching unit 30 to supply the charging power from the storage battery 14 side to the load 60 side. have.

A load 60 using DC power is connected to the output side of the switching unit 30, and the load 60 using DC power includes, for example, an outdoor signage 61 using an LED as a light source, an indoor light 62, and An outdoor light 63 or the like may be installed.

The load 60 may include electric devices using voltages of various levels, and for this purpose, a divider 50 may be connected between the switching unit 30 and the load 60. The divider 50 includes a first voltage unit 51 that outputs 5 [V] DC voltage, a second voltage unit 52 that outputs 12 [V] DC voltage, and other predetermined voltages of [V]. Dividers for outputting DC voltages of various levels, such as the n-th voltage unit 53, may be provided. One or more loads requiring a current voltage of a corresponding level may be connected to each of the voltage units to be driven by receiving a DC voltage.

2 is a flowchart illustrating a charging method according to the present invention.

First, the main controller 41 of the control unit 40 detects the charging voltage of the storage battery 14 through the charging voltage detection unit 42.

At this time, it is determined whether the charging voltage of the storage battery 14 is higher than the preset overcharging reference voltage to determine whether the charging voltage is overcharged, and if it is higher than the overcharging reference voltage, the charging/discharging control unit 13 is controlled to perform the charging action. Block.

However, when the main controller 41 determines that the charging voltage of the storage battery 14 is lower than the overcharging reference voltage, it controls the charge/discharge control unit 13 to charge the electricity generated by the solar cell array 11. The charging operation is controlled so that the main controller 41 continues until it is determined that the charging voltage of the storage battery 14 becomes higher than the overcharge reference voltage.

3 is a flowchart illustrating a method of supplying power to a load side according to the present invention.

When the main controller 41 of the control unit 40 requires power supply from the load 60 side, whether the charging voltage of the storage battery 14 remains above a predetermined charge amount through the charging voltage detection unit 42 Judge

At this time, if it is determined that the charging voltage of the storage battery 14 remains above a predetermined charge amount, the main controller 41 controls the switching unit 30 to output the battery output power from the switching unit 30, while , When the amount of charge is less than a predetermined amount, the switching unit 30 controls the switching so that the output power of the commercial power supply unit is output.

In this way, the control unit 40 is configured to first output the battery output power if the charge voltage of the storage battery 14 remains above a predetermined charge amount when there is a power supply request from the load 60 side.

Therefore, when the present invention is applied to a food service company that uses a lot of electricity at night, it is possible to reduce the cost of using commercial power by using the electricity charged by using sunlight during the day. Signboards and indoor/outdoor lighting are also in the trend of using light sources as LEDs, so there is an advantage in that construction costs can be reduced.

10--Solar power supply, 11-Cell array,
12 - DC/DC regulator, 13 - charge/discharge control unit,
14 - battery for storage, 15 - DC/DC converter,
20 - Commercial power supply, 21 - Commercial power supply,
22 - rectifying section, 30 - switching section,
40 - control unit, 41 - main controller,
42 - charging voltage sensing unit, 50 - divider,
60 - load.

Claims (3)

A solar cell array that generates electricity using sunlight, a DC/DC regulator that stabilizes and outputs DC electricity generated by the solar cell array to a predetermined voltage level, and stores DC power output from the DC/DC regulator. A solar power generation unit consisting of a storage battery, a DC/DC converter that converts and outputs DC power output from the storage battery into a DC voltage of a predetermined level, and a battery output power by the DC/DC converter is input to one input terminal. And a switching unit configured to selectively output the output power of the storage battery side and the output power of the commercial power supply unit by connecting the output power of the commercial power supply to the other input terminal, and the storage battery when a power supply request is requested from the load side. Of the interior lighting comprising a control unit that determines the charging amount of and controls the switching so that the switching unit outputs the battery output power when the charging amount is greater than or equal to the predetermined charging amount, and the switching unit outputs the output power of the commercial power supply unit when the charging amount is less than the predetermined charging amount. Power usage cost reduction device.
The method of claim 1,
The power usage cost reduction device for interior lighting, characterized in that the control unit is further connected to a charging voltage sensing unit that senses the amount of charge of the storage battery and transmits it to the main controller.
The method according to claim 1 or 2,
Power for interior lighting, characterized in that the switching unit is additionally connected to the switching unit by distributing input power to different rated DC voltages and supplying them to outdoor signage, indoor lighting, and outdoor lighting using different levels of DC voltage. Usage fee reduction device.

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