An energy-saving advertising display device

Abstract

This invention discloses an energy-saving advertising display device, belonging to the field of power transmission. The device includes a column, multiple billboards, a water storage tank, a water-cooled heat dissipation plate, a solar panel, a cryogenic generator, and a central controller. The water storage tank is divided into upper and lower layers with a valve separating them. The water-cooled heat dissipation plate is installed on the back of the billboards to absorb waste heat and heat the water in the upper layer of the tank. The lower layer has an electric heating element, powered by the solar panel after the energy storage battery is fully charged. The cryogenic generator is installed in the lower layer and generates electricity using the hot water. The central controller prioritizes power supply from the cryogenic generator according to operating conditions, then switches to the energy storage battery and mains power. When the hot water in the lower layer is insufficient, it drains the water and introduces hot water from the upper layer to continue generating electricity. This invention achieves cascade utilization of waste heat from the billboards and solar energy, and internal energy circulation, improving the overall energy utilization rate and reducing mains power consumption.

Description

Technical Field

[0001] This invention relates to the field of power transmission, specifically to an energy-saving advertising display device. Background Technology

[0002] With the acceleration of urbanization, large advertising display devices, such as streetlight billboards, play an important role in the urban landscape. Traditional advertising display devices are usually directly connected to the mains power grid, resulting in high energy consumption. To reduce energy consumption, solar photovoltaic panels are often introduced as supplementary energy sources, or even conventional energy sources such as wind turbines. These solutions involve mutual supplementation or simple superposition of energy sources, which achieves energy-saving goals to a certain extent.

[0003] However, the applicant discovered that the existing solutions merely involve switching or substituting between several conventional energy sources, such as storing solar-powered electricity during the day for nighttime use and switching back to grid power when solar power is exhausted. These solutions fail to fully utilize the advantages of the advertising display device, and there is no efficient management system for various energy sources to achieve energy-efficient utilization. Summary of the Invention

[0004] To address the technical problem of inefficient energy utilization in existing outdoor advertising devices, this invention provides an energy-saving advertising display device.

[0005] To achieve the above objectives, the present invention provides an energy-saving advertising display device, including a column on which multiple advertising boards are mounted, and further comprising:

[0006] A water storage tank is installed in the gap between each billboard; the water storage tank is divided into upper and lower layers, and a partition valve is installed between the upper and lower layers of the water storage tank.

[0007] A water-cooled heat dissipation plate is installed on the back of the billboard. The water-cooled heat dissipation plate is used to absorb the heat emitted by the billboard. The water-cooled heat dissipation plate is connected to the upper layer of the water storage tank to heat the water in the upper layer of the water storage tank.

[0008] An electric heating tube is installed in the lower layer of the water storage tank, and the electric heating tube is used to heat the water in the lower layer;

[0009] Multiple solar panels are installed above the water storage tank. The solar panels are connected to the energy storage battery and the electric heating tube respectively. When the energy storage battery is fully charged by solar energy, the solar panels supply power to the electric heating tube to heat the water in the lower layer of the water storage tank.

[0010] A cryogenic generator is installed in the lower layer of the water storage tank, and the cryogenic generator is connected to the billboard;

[0011] When the billboard needs power, the central controller first controls the cryogenic generator to generate electricity using the hot water in the lower layer of the water tank to power the billboard. When the hot water in the lower layer of the water tank cannot drive the cryogenic generator to generate electricity, the controller controls the water tank to drain the water in the lower layer and then controls the isolation valve to open to allow the hot water in the upper layer to continue generating electricity in the lower layer. When the cryogenic generator cannot work, the controller switches to the energy storage battery for power supply. When the energy storage battery cannot provide power, the controller switches to the mains power supply.

[0012] As a further improvement, an external water tank is provided below the column to collect the discharged water.

[0013] As a further improvement, the outlet of the water-cooled heat dissipation plate is connected to the upper layer of the water storage tank, and the inlet is connected to an external water tank. A water pump is installed on the inlet pipe.

[0014] As a further improvement, a hydroelectric generator is also included, which is installed on the drainage pipe of the lower layer of the water storage tank and its outlet extends into an external water tank, for generating electricity by the impact of water flow when the lower layer of the water storage tank is drained.

[0015] As a further improvement, water level sensors are respectively installed in the upper and lower layers of the water storage tank. The water level sensors are connected to the central controller and are used to monitor the water level in the upper and lower layers.

[0016] As a further improvement, the central controller controls the water pump to pump water from the external water tank back to the upper layer of the water tank according to the water level of the water storage tank and the power generation demand, so as to realize the recycling of water resources.

[0017] As a further improvement, when the temperature difference between the lower layer of the water in the storage tank and the ambient temperature is detected to be higher than the start-up temperature difference threshold, the cryogenic generator is started first to generate electricity. The electricity generated by the cryogenic generator is used for the low-power load of the billboard or for trickle charging of the energy storage battery.

[0018] As a further improvement, the billboard is an electronic billboard or an LED billboard, and the billboard is equipped with a brightness adjustment module. The central controller automatically adjusts the display brightness of the billboard according to the ambient light intensity.

[0019] As a further improvement, the cryogenic generator employs an organic Rankine cycle assembly with R134a, R245fa, or pentane as the working fluid.

[0020] As a further improvement, when the system switches to the mains power supply circuit, the controller executes the following battery replenishment and charging management strategy:

[0021] Constant current charging is performed at a rate not exceeding 0.2C of the rated capacity of the energy storage battery until the battery charge reaches the preset "mains charging cutoff charge", which is 80% SOC;

[0022] When the battery level reaches the cutoff level, the mains charging will automatically stop, and the battery self-discharge will be checked every 30 minutes. If the battery level drops by more than 1%, it will be charged again for 2 minutes to keep the battery in a healthy float charging state.

[0023] If the controller detects that the peak period of photovoltaic power generation for the next day is approaching, it will terminate the grid charging in advance to reserve charging space for photovoltaic power generation.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] This patent adds a water storage tank to the traditional external energy source, dividing the tank into upper and lower layers. The upper tank is connected to a water-cooled heat sink, which absorbs the heat emitted by the billboard and heats the water in the upper layer of the tank. This hot water flows into the lower tank, where a low-temperature generator converts the heat from the billboard into electricity, thus achieving partial internal energy circulation and better energy-saving effects. Furthermore, the water in the lower tank can be stored by heating excess energy from the solar panels (when the storage battery is fully charged by solar energy, the solar panels power the electric heating element to heat the water in the lower tank), allowing this application to fully utilize the energy of solar cells while simultaneously achieving internal energy circulation.

[0026] When this application is used, if the billboard requires power, the central controller first controls the cryogenic generator to generate electricity using the hot water in the lower layer of the water tank to power the billboard. If the hot water in the lower layer of the water tank cannot power the cryogenic generator, the controller controls the water tank to drain the water from the lower layer and then controls the isolation valve to open the upper layer of hot water to continue generating electricity in the lower layer. When the cryogenic generator cannot work, the system switches to power supply from the energy storage battery. When the energy storage battery cannot provide power, the system switches to mains power. This application effectively utilizes the water in the water tank to collect energy lost by other devices, and then converts and reuses it through the cryogenic generator, making the energy utilization efficiency of this application higher.

[0027] This application creatively divides the water tank into upper and lower layers, allowing the hot water used for power generation in the lower layer to operate in a closed space, which can minimize energy loss.

[0028] Therefore, this application changes the conventional approach (adding external energy) and instead starts from the inside: by collecting energy lost from other devices and managing energy in a systematic, tiered manner, it improves the overall energy utilization rate, extends the life of energy storage batteries, and achieves high self-sufficiency, high reliability, and low operating costs for the advertising display device. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the energy-saving advertising display device of the present invention;

[0030] Figure 2 This is a front view structural cross-sectional view of the energy-saving advertising display device of the present invention;

[0031] Figure 3 This is a schematic diagram of the controllable spotlight structure of the present invention;

[0032] Figure 4 This is a flowchart of the main steps of the control method of the present invention;

[0033] Figure 5 This is a flowchart of the solar panel power supply section of the present invention;

[0034] Figure 6 This is a flowchart of the thermal power supply and temperature difference power supply parts of the present invention;

[0035] Figure 7 This is a flowchart of the mains power supply part of the present invention.

[0036] In the picture:

[0037] 1. Column; 2. Water storage tank; 21. Isolation valve; 3. Billboard; 31. Water-cooled heat sink; 4. Controllable spotlight; 5. Solar panel; 6. Sprinkler system; 7. Filtration system; 8. Water pump; 9. Energy storage battery; 10. Central controller; 11. Electric heating element; 12. Low temperature generator; 13. Hydroelectric generator. Detailed Implementation

[0038] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0039] Example 1

[0040] like Figures 1 to 3 As shown, an energy-saving advertising display device includes a column 1 vertically fixed to the ground. Multiple billboards 3 are installed on the column 1. A water storage tank 2 is installed in the gap between each billboard 3. The water storage tank 2 is divided into upper and lower layers, and an isolation valve 21 is installed between the upper and lower layers to control the opening and closing of the water supply from the upper layer to the lower layer.

[0041] A water-cooled heat sink 31 is installed on the back of the billboard 3 to absorb the heat generated during operation. The outlet of the water-cooled heat sink 31 is connected to the upper layer of the water storage tank 2 to heat the water in the upper layer; the inlet of the water-cooled heat sink 31 is connected to an external water tank through a pipe, and a water pump 8 is installed on the inlet pipe to pump water from the external water tank into the water-cooled heat sink 31 for circulation. An electric heating tube 11 is installed in the lower layer of the water storage tank 2 to heat the water in the lower layer.

[0042] Multiple solar panels 5 are installed above the water storage tank 2, and the solar panels 5 are electrically connected to the energy storage battery 9 and the electric heating tube 11, respectively. When the energy storage battery 9 is fully charged by solar energy, the solar panels 5 switch to power the electric heating tube 11 to heat the water in the lower layer of the water storage tank 2, converting excess solar energy into heat energy for storage. A spray device 6 is also installed above the water storage tank 2 for cleaning the surface of the solar panels 5. The solar panels 5 are funnel-shaped, and a filter device 7 is connected to their lower edge. The outlet of the filter device 7 is connected to the water storage tank 2 for collecting rainwater or washing water and filtering it.

[0043] The cryogenic generator 12 is installed in the lower layer of the water storage tank 2. The cryogenic generator 12 uses an organic Rankine cycle assembly, with R134a, R245fa, or pentane as the working fluid. Its hot end is submerged in the lower water layer, while its cold end is exposed to the external atmosphere, generating electricity using the temperature difference between the lower hot water and the environment. The cryogenic generator 12 is electrically connected to the billboard 3, providing it with power.

[0044] A hydroelectric generator 13 is installed on the drainage pipe of the lower layer of the water storage tank 2. The outlet of the hydroelectric generator 13 extends into an external water tank to generate electricity by the impact of water flow when the lower layer of the water storage tank 2 is drained. An external water tank is located below the column 1 to collect the discharged water. Water level sensors are installed on the upper and lower layers of the water storage tank 2, respectively. The water level sensors are connected to the central controller 10 to monitor the water level of the upper and lower layers in real time.

[0045] The central controller 10 is built into the column 1 and is electrically connected to the controllable spotlight 4, solar panel 5, sprinkler device 6, filter device 7, water pump 8, energy storage battery 9, electric heating tube 11, cryogenic generator 12, hydroelectric generator 13 and various sensors to execute the following control strategies.

[0046] The billboard 3 is internally equipped with multiple controllable spotlights 4. Each spotlight 4 can be driven by an independent micro motor to change its illumination angle, and its brightness can be adjusted by the central controller 10, thereby achieving precise illumination of different areas of the advertising image. The billboard 3 is an electronic billboard or an LED billboard, and it is equipped with a brightness adjustment module. The central controller 10 automatically adjusts the display brightness of the billboard 3 according to the ambient light intensity.

[0047] Example 2

[0048] like Figures 4 to 7 As shown, this embodiment describes the control method of the device.

[0049] The central controller 10 monitors parameters such as the power of the energy storage battery 9, the water temperature of the lower layer of the water storage tank 2, the ambient temperature, and the water levels of the upper and lower layers in real time.

[0050] When the billboard 3 needs power, the central controller 10 first controls the cryogenic generator 12 to generate electricity using the hot water in the lower layer of the water storage tank 2 to power the billboard 3. Specifically, if the temperature difference between the lower layer water and the ambient temperature is higher than the start-up temperature difference threshold (e.g., 8°C), the cryogenic generator 12 is started, and its power is preferentially supplied to the controllable spotlights 4 and display unit of the billboard 3.

[0051] When the operation of the cryogenic generator 12 causes the temperature of the lower water layer to drop to a level where the temperature difference cannot maintain effective power generation (e.g., temperature difference <8℃), the central controller 10 controls the drain valve of the lower layer of the water storage tank 2 to open, draining the lower water. The drained water flows through the hydroelectric generator 13 and generates electricity, which is also used for the billboard 3 or to charge the energy storage battery 9. After the drainage is completed, the central controller 10 controls the isolation valve 21 to open, guiding the hot water from the upper layer (which has been heated by the waste hot water cooling plate 31 of the billboard) to the lower layer, continuing to use the temperature difference to drive the cryogenic generator 12 to generate electricity.

[0052] If the hot water on the upper layer has cooled to the point where it can no longer sustain the operation of the cryogenic generator 12, the central controller 10 switches to the energy storage battery 9 to power the billboard 3. When the energy storage battery 9's charge level falls below a first charge threshold (e.g., 30% SOC), it switches to mains power.

[0053] Furthermore, during periods of ample solar energy, the solar panel 5 prioritizes charging the energy storage battery 9. Once the battery 9 is fully charged, the solar panel 5 automatically switches to power the electric heating element 11, heating the water in the lower layer of the water storage tank 2 and storing excess electrical energy as heat. Simultaneously, the water-cooled heat dissipation plate 31 continuously recovers waste heat from the billboard 3, heating the upper layer of water, thus achieving cascade utilization of heat. The spray device 6 can be activated as needed to clean the surface of the solar panel 5. The cleaning water is filtered by the filter device 7 and then returned to the water storage tank 2, achieving water resource recycling.

[0054] When the difference between the lower water temperature of the water tank 2 and the ambient temperature is detected to be higher than the start-up temperature difference threshold, the central controller 10 will prioritize starting the cryogenic generator 12 to generate electricity, even if the billboard 3 does not require high power supply. The electricity is used for the low-power loads of the billboard 3 (such as standby display, sensors, controllers) or for trickle charging of the energy storage battery 9 to maintain the system's self-operation.

[0055] The central controller 10 also controls the water pump 8 to pump water from the external water tank back to the upper layer of the water storage tank 2 based on the water level of the storage tank 2 and the power generation requirements, thereby realizing the recycling of water resources. Regarding the controllable spotlights 4 inside the billboard 3, the central controller 10 can analyze the coordinates of the highlighted information area based on the bitmap of the content to be displayed, and control the adjustment motor of each controllable spotlight 4 to drive the corresponding light source, so that the light spot accurately covers the highlighted area, while the light sources located in non-information areas are turned off or dimly lit, further reducing lighting energy consumption.

[0056] When the system switches to the mains power supply circuit, the central controller 10 executes the battery supplementary charging management strategy: constant current charging is performed at a rate not exceeding 0.2C of the rated capacity of the energy storage battery 9 until the battery level reaches the preset "mains charging cutoff level", which is 80% SOC; when the battery level reaches the cutoff level, mains charging is automatically stopped, and the battery self-discharge is checked every 30 minutes. If the battery level drops by more than 1%, it is supplemented with charging for 2 minutes to maintain the battery in a healthy float charging state; if the central controller 10 detects that the peak period of photovoltaic power generation for the next day is about to begin, mains charging is terminated in advance to reserve charging space for photovoltaic power generation.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An energy-saving advertising display device, comprising a column on which multiple advertising boards are mounted, characterized in that, It also includes: A water storage tank, which is installed in the gap between each billboard; The water storage tank is divided into upper and lower layers, and a partition valve is installed between the upper and lower layers of the water storage tank. A water-cooled heat dissipation plate is installed on the back of the billboard. The water-cooled heat dissipation plate is used to absorb the heat emitted by the billboard. The water-cooled heat dissipation plate is connected to the upper layer of the water storage tank to heat the water in the upper layer of the water storage tank. An electric heating tube is installed in the lower layer of the water storage tank, and the electric heating tube is used to heat the water in the lower layer; Multiple solar panels are installed above the water storage tank. The solar panels are connected to the energy storage battery and the electric heating tube respectively. When the energy storage battery is fully charged by solar energy, the solar panels supply power to the electric heating tube to heat the water in the lower layer of the water storage tank. A cryogenic generator is installed in the lower layer of the water storage tank, and the cryogenic generator is connected to the billboard; When the billboard needs power, the central controller first controls the cryogenic generator to generate electricity using the hot water in the lower layer of the water tank to power the billboard. When the hot water in the lower layer of the water tank cannot drive the cryogenic generator to generate electricity, the controller controls the water tank to drain the water in the lower layer and then controls the isolation valve to open to allow the hot water in the upper layer to continue generating electricity in the lower layer. When the cryogenic generator cannot work, the controller switches to the energy storage battery for power supply. When the energy storage battery cannot provide power, the controller switches to the mains power supply.

2. The energy-saving advertising display device according to claim 1, characterized in that, It also includes: An external water tank is located below the column to collect discharged water.

3. The energy-saving advertising display device according to claim 2, characterized in that: The outlet of the water-cooled heat dissipation plate is connected to the upper layer of the water storage tank, and the inlet is connected to an external water tank. A water pump is installed on the inlet pipe.

4. The energy-saving advertising display device according to claim 3, characterized in that: It also includes a hydroelectric generator, which is installed on the drainage pipe of the lower layer of the water storage tank, with its outlet extending into an external water tank, and is used to generate electricity by the impact of water flow when the lower layer of the water storage tank is drained.

5. The energy-saving advertising display device according to claim 1, characterized in that: The upper and lower layers of the water storage tank are respectively equipped with water level sensors, which are connected to the central controller to monitor the water level of the upper and lower layers.

6. The energy-saving advertising display device according to claim 3, characterized in that: The central controller controls the water pump to pump water from the external water tank back to the upper layer of the water tank based on the water level in the storage tank and the power generation demand, so as to realize the recycling of water resources.

7. The energy-saving advertising display device according to claim 1, characterized in that: When the temperature difference between the lower layer of water in the storage tank and the ambient temperature is detected to be higher than the start-up temperature difference threshold, the cryogenic generator is started first to generate electricity. The electricity generated by the cryogenic generator is used for the low-power load of the billboard or for trickle charging of the energy storage battery.

8. The energy-saving advertising display device according to claim 1, characterized in that: The billboard is an electronic billboard or an LED billboard, and the billboard is equipped with a brightness adjustment module. The central controller automatically adjusts the display brightness of the billboard according to the ambient light intensity.

9. The energy-saving advertising display device according to claim 1, characterized in that: The cryogenic generator uses an organic Rankine cycle assembly, with R134a, R245fa, or pentane as the working fluid.

10. The energy-saving advertising display device according to claim 1, characterized in that: When the system switches to the mains power supply circuit, the central controller executes the following battery replenishment and charging management strategy: Constant current charging is performed at a rate not exceeding 0.2C of the rated capacity of the energy storage battery until the battery charge reaches the preset "mains charging cutoff charge", which is 80% SOC; When the battery level reaches the cutoff level, the mains charging will automatically stop, and the battery self-discharge will be checked every 30 minutes. If the battery level drops by more than 1%, it will be charged again for 2 minutes to keep the battery in a healthy float charging state. If the central controller detects that the peak period of photovoltaic power generation for the next day is approaching, it will terminate the grid charging in advance to reserve charging space for photovoltaic power generation.

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