Magnetic flow controller for enhancing circulation of solar heat transfer medium

Abstract

A magnetic flow controller for strengthening the circulation of solar heat-conducting medium includes a photovoltaic power generation device, a magnetic fluid driver and a controller. The magnetic fluid driver is electrically connected to the photovoltaic power generation device, and the magnetic fluid driver is connected to the controller; the magnetic fluid driver includes a heat-conducting medium annular channel, a magnetic field generator and an electric field generator. The magnetic field generator and the electric field generator are arranged in the heat-conducting medium annular channel, and both are connected to the photovoltaic power generation device through wires. The magnetic field generator is used to generate an annular magnetic field in the heat-conducting medium annular channel, and the electric field generator is used to generate an electric field perpendicular to the magnetic field in the heat-conducting medium annular channel. The present invention strengthens or suppresses the circulation of the heat-conducting medium to achieve flow control of the heat-conducting medium, solves the problem of not heating or overheating in solar thermal utilization, is conducive to the optimized movement of the solar water heating system, prevents the overheating of the water storage tank, and improves the life of the solar water heating system.

Description

Technical Field

[0001] The invention relates to a protective device for strengthening the circulation of solar heat-conducting medium and improving the phenomenon of solar energy not being heated or being overheated, and belongs to the technical field of solar energy heating. Background Art

[0002] With the popularization of solar thermal utilization technology and the need for energy conservation and emission reduction, there will be more and more solar thermal utilization projects in high-rise buildings. However, due to air blockage, reverse slope and other reasons, the circulation of heat transfer medium is not smooth, resulting in frequent problems of solar energy not heating.

[0003] To solve the above problems, circulating water pumps are currently used for forced circulation. However, mechanical parts are easily damaged due to long-term operation, and are accompanied by noise and vibration, which affects the daily life of residents.

[0004] In addition, when the sunlight intensity is too strong, solar overheating is likely to occur, endangering system safety and personal health.

[0005] In view of the above problems, it is necessary to improve the existing solar heat transfer circulation pipeline, control the circulation flow of the heat transfer medium, and realize the full utilization of solar energy. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a magnetic flow controller that realizes automatic regulation of the circulation of solar heat transfer medium, so as to strengthen or inhibit the circulation of heat transfer medium according to specific working conditions, solve the problem of insufficient heat or overheating in solar heat utilization, and protect the water storage tank to increase the life of the solar water heating system.

[0007] The magnetic flow controller for strengthening the circulation flow of solar heat-conducting medium of the present invention adopts the following technical scheme.

[0008] The magnetic flow controller comprises a photovoltaic power generation device, a magnetic fluid driver and a controller. The magnetic fluid driver is electrically connected to the photovoltaic power generation device, and the magnetic fluid driver is connected to the controller.

[0009] The photovoltaic power generation device adopts existing photovoltaic power generation equipment to directly convert light energy into electrical energy, which is an existing technology. The photovoltaic power generation device provides power for the magnetic fluid drive and controller. The photovoltaic power generation device can change the power supply amount due to changes in solar radiation intensity, thereby realizing self-regulation of the operation of the magnetic fluid drive.

[0010] The magnetic fluid driver comprises a heat-conducting medium annular channel, a magnetic field generator and an electric field generator. The magnetic field generator and the electric field generator are arranged in the heat-conducting medium annular channel, and both are connected to the photovoltaic power generation device through wires. The magnetic field generator is used to generate an annular magnetic field in the heat-conducting medium annular channel, and the electric field generator is used to generate an electric field perpendicular to the magnetic field in the heat-conducting medium annular channel.

[0011] The heat-conducting medium annular channel is an intermediate annular cavity formed between an inner shell and an outer shell that are sheathed inside and outside.

[0012] The magnetic field generator is a magnetic induction coil, which is connected to the photovoltaic power generation device through a wire. The coil can be a superconducting coil.

[0013] The electric field generator includes an inner electrode plate, an outer electrode plate and a control circuit. The inner electrode plate and the outer electrode plate are respectively arranged on the inner wall and the outer wall of the annular channel of the heat-conducting medium. The inner electrode plate and the outer electrode plate are circumferentially spaced apart, and the magnetic field generator is radially arranged in the space between them.

[0014] The control circuit includes a series-connected conversion switch, a main switch, a power supply and an adjustable resistor, and the inner electrode plate and the outer electrode plate are connected to the conversion switch. The positive and negative of the inner electrode plate and the outer electrode plate are changed by the conversion switch, and the current size is adjusted by the adjustable resistor, thereby changing the size and direction of the electric field and controlling the flow direction and flow speed of the heat-conducting medium.

[0015] The electric field generator can adjust the positive and negative of the electrode plate by switching the switch combination on and off according to the actual heat demand, control the flow of the heat transfer medium, and solve the problem of insufficient heat or overheating in the utilization of solar thermal energy.

[0016] The controller is controlled by a single chip microcomputer.

[0017] When in use, the magnetic fluid drive is connected to the heat transfer medium circulation pipeline between the collector and the water tank in the solar water heating system. The heat transfer medium with charged particles moves under the action of the electric field force in the magnetic fluid drive. The magnetic field generator in the magnetic fluid drive generates a magnetic field. The moving charged particles are affected by the Lorentz force in the magnetic field and move along the heat transfer medium circulation pipeline to drive the heat transfer medium to flow. The magnetic fluid drive is controlled by a controller. According to the actual working conditions and the water temperature changes in the water tank, the size and direction of the electric field in the magnetic fluid drive are controlled, the size and direction of the Lorentz force are changed, and the flow direction and flow speed of the heat transfer medium are controlled; considering that the solar water heating system itself has the self-circulation of the heat transfer medium, it will strengthen or inhibit the circulation flow of the heat transfer medium, and obtain a heat transfer medium circulation mode that fully utilizes solar energy.

[0018] The present invention strengthens or inhibits the circulation flow of the heat-conducting medium, realizes the flow control of the heat-conducting medium, solves the problem of underheating or overheating in solar thermal utilization, and is beneficial to the optimization movement of the solar water heating system.

[0019] On the one hand, the present invention can strengthen the forward flow of the heat-conducting medium, generate a positive Lorentz force by adjusting the magnetic fluid drive, accelerate the flow of the heat-conducting medium, increase the speed of heat transfer between the collector and the water tank, and solve the problem of heat dissipation in solar thermal utilization; on the other hand, the circulation flow of the heat-conducting medium can be suppressed. When the water temperature in the water tank is too high, the reverse Lorentz force is formed by adjusting the magnetic fluid drive, the speed of heat transfer between the collector and the water tank is reduced, and the circulation flow of the heat-conducting medium is suppressed. At this time, most of the heat is stored in the collector, the heat collection efficiency of the collector is reduced, the heat loss is increased, the heat dissipation speed is accelerated, the overheating of the water tank is prevented, and the life of the solar water heating system is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the magnetic flow controller of the present invention.

[0021] Figure 2 It is a schematic diagram of the structure of the magnetic fluid drive in the present invention.

[0022] Figure 3 It is a circuit schematic diagram of the electric field generator in the present invention.

[0023] In the figure: 1. Photovoltaic power generation device, 2. Controller, 3. Magnetic fluid drive, 4. Magnetic field generator, 5. Inner electrode plate, 6. Collector, 7. Water storage tank, 8. Heat transfer medium annular channel, 9. Heat transfer medium circulation pipeline, 10. Outer shell, 11. Inner shell, 12. Outer electrode plate; 13. Power supply, 14. Adjustable resistor, 15. Switch, 16. Main switch. DETAILED DESCRIPTION

[0024] The main purpose of the present invention is to strengthen or suppress the circulation of the heat-conducting medium, realize the flow control of the heat-conducting medium, solve the problem of not heating or overheating in the utilization of solar thermal energy, and is conducive to the optimization of the movement of the solar water heating system, while protecting the water tank and improving the life of the solar water heating system. The magnetic flow controller changes the magnitude and direction of the Lorentz force on the charged particles in the heat-conducting medium by changing the positive and negative electrodes and the current, thereby strengthening or suppressing the circulation of the heat-conducting medium, obtaining a heat-conducting medium circulation mode that fully utilizes solar energy, and solving the problem of not heating or overheating in the utilization of solar thermal energy.

[0025] like Figure 1As shown, the magnetic flow controller of the present invention includes a photovoltaic power generation device 1, a controller 2 and a magnetic fluid driver 3. The controller 2 and the magnetic fluid driver 3 are electrically connected to the photovoltaic power generation device 1. The photovoltaic power generation device 1 provides power for the controller 2 and the magnetic fluid driver 3. The photovoltaic power generation device 1 changes the power supply amount due to the change in the intensity of solar radiation, so as to realize the self-regulation of the operation of the magnetic fluid driver 3. The photovoltaic power generation device 1 adopts the existing photovoltaic power generation equipment to directly convert light energy into electrical energy. It is a prior art. The photovoltaic components in the photovoltaic power generation device 1 are placed on one side of the lighting surface of the solar water heater collector to receive solar radiation together with the solar collector. The magnetic fluid driver 3 is connected to the controller 2. The controller 2 is controlled by a single-chip microcomputer, and the water temperature parameters and the input interface of the pipeline matching can be manually input. The controller 2 can be set on the outer shell of the water storage tank 7 in the solar water heating system, and the temperature sensor in the water storage tank 7 is connected to the controller 2 to collect the water temperature parameters in the water storage tank 7 in real time.

[0026] The magnetic fluid driver 3 is connected to the heat transfer medium circulation pipeline 9 between the collector 6 and the water storage tank 7 in the solar water heating system, and the outer side of the heat transfer medium circulation pipeline 9 is insulated with heat insulation sponge. The two ends of the magnetic fluid driver 3 can be connected to pipe joints of different diameters to ensure that the connection between the magnetic fluid driver 3 and the heat transfer medium circulation pipeline 9 is normal.

[0027] like Figure 2 As shown, the magnetic fluid driver 3 includes a heat-conducting medium annular channel 8, a magnetic field generator 4 and an electric field generator. The magnetic field generator 4 and the electric field generator are two independent parts. The magnetic field generator 4 is used to generate an annular magnetic field in the heat-conducting medium annular channel 8. The electric field generator is used to generate an electric field perpendicular to the magnetic field in the heat-conducting medium annular channel. The photovoltaic power generation device 1 provides power to the magnetic field generator 4 and the electric field generator 5 respectively. The heat-conducting medium with charged particles moves under the action of the electric field force, and the magnetic field generator 4 generates a magnetic field. The moving charged particles are affected by the Lorentz force in the magnetic field and move along the heat-conducting medium annular channel 8, driving the heat-conducting medium to flow. The heat-conducting medium annular channel 8 is connected to the heat-conducting medium circulation pipeline 9 in the solar water heating system, and the heat-conducting medium flows therein.

[0028] The magnetic field generator 4 is a magnetic induction coil, which can be a superconducting coil, and the coil is connected to the photovoltaic power generation device 1. The self-regulation of the magnetic field strength of the magnetic fluid driver 3 is achieved by changing the power supply of the photovoltaic power generation device 1 itself, changing the Lorentz force on the moving charged particles in the magnetic field, and adjusting the flow speed of the heat-conducting medium.

[0029] The electric field generator includes an inner electrode plate 5 and an outer electrode plate 12. Connectors (not shown) are provided at both ends of the heat-conducting medium annular channel 8 for connecting to the heat-conducting medium circulation pipeline 9 of the solar water heating system. The heat-conducting medium annular channel 8 is formed by the middle annular cavity between the inner shell 11 and the outer shell 10 which are set inside and outside. The magnetic field generator 4 and the electric field generator are both arranged in the heat-conducting medium annular channel 8 between the inner and outer shells, wherein the inner electrode plate 5 and the outer electrode plate 12 of the electric field generator are respectively placed on the inner wall (outer wall of the inner shell 11) and the outer wall (inner wall of the outer shell 10) of the heat-conducting medium circulation flow channel 8. The inner electrode plate 5 and the outer electrode plate 12 of the electric field generator are circumferentially spaced in the heat-conducting medium annular channel 8, and the magnetic field generator 4 is arranged in the space between the adjacent inner electrode plates 5 and the outer electrode plates 12, and each magnetic field generator 4 is radially distributed in the heat-conducting medium annular channel 8. The magnetic field generator 4 can also be embedded in the inner and outer walls of the heat-conducting medium annular channel 8.

[0030] The electric field generator generates an electric field perpendicular to the magnetic field in the heat-conducting medium annular channel 8, and includes not only the inner electrode plate 5 and the outer electrode plate 12, but also a control circuit. Figure 3 As shown, the control circuit includes a conversion switch 15, a main switch 16, a power supply 13 and an adjustable resistor 14, the conversion switch 15, the main switch 16, the power supply 13 and the adjustable resistor 14 are connected in series, the inner electrode plate 5 and the outer electrode plate 12 are connected to the conversion switch 15, and the conversion switch 15 can be an electric double-pole double-throw switch, and the connection method is as follows Figure 3 , so as to realize the positive and negative conversion of the inner electrode plate 5 and the outer electrode plate 12. The adjustable resistor 14 can be a digital potentiometer. The power supply 13 is provided by the photovoltaic power generation device 1, and is connected to the photovoltaic power generation device 1 through a wire through the adjustable resistor 14 and the conversion switch 15. The conversion switch 15 and the adjustable resistor 14 are both connected to the controller 2, and the controller 2 can adopt existing technologies such as a single-chip microcomputer. The controller 2 controls the automatic switching of the conversion switch 15 and adjusts the resistance value of the digital potentiometer.

[0031] The magnetic fluid driver 3 is controlled by the controller 2, and the conversion switch 15 and the adjustable resistor 14 are automatically controlled by the controller 2. The water temperature signal is collected by the temperature sensor set in the water tank 7. After receiving the water temperature signal, the controller 2 makes a judgment and makes a judgment on whether to adjust the conversion switch 15 and the adjustable resistor 14. According to the actual working conditions and the change of water temperature in the water tank 7, the positive and negative of the inner electrode plate 5 and the outer electrode plate 12 are adjusted by the combination of the conversion switch 15, and the electric field size is changed by adjusting the resistance value of the sliding rheostat 14, thereby changing the size and direction of the Lorentz force, and then controlling the speed and direction of the flow of the heat-conducting medium. Considering that the solar water heating system itself has the self-circulation of the heat-conducting medium, it will strengthen or inhibit the circulation of the heat-conducting medium, and obtain a heat-conducting medium circulation mode that fully utilizes solar energy.

Claims

1. A magnetic flow controller for strengthening the circulation of solar heat transfer medium, characterized by: It includes a photovoltaic power generation device, a magnetic fluid driver and a controller, wherein the magnetic fluid driver is electrically connected to the photovoltaic power generation device, and the magnetic fluid driver is connected to the controller; The magnetic fluid driver comprises a heat-conducting medium annular channel, a magnetic field generator and an electric field generator. The magnetic field generator and the electric field generator are arranged in the heat-conducting medium annular channel, and both are connected to the photovoltaic power generation device through wires. The magnetic field generator is used to generate an annular magnetic field in the heat-conducting medium annular channel, and the electric field generator is used to generate an electric field perpendicular to the magnetic field in the heat-conducting medium annular channel. The heat-conducting medium annular channel is an intermediate annular cavity formed between the inner shell and the outer shell. The magnetic field generator is a magnetic induction coil, and the coil is connected to the photovoltaic power generation device through a wire; The electric field generator comprises an inner electrode plate, an outer electrode plate and a control circuit, the inner electrode plate and the outer electrode plate are respectively arranged on the inner wall and the outer wall of the annular channel of the heat-conducting medium, the inner electrode plate and the outer electrode plate are circumferentially spaced, and the magnetic field generator is radially arranged in the space between them; The control circuit includes a conversion switch, a main switch, a power supply and an adjustable resistor connected in series, and the inner electrode plate and the outer electrode plate are connected to the conversion switch; The magnetic fluid drive is connected to the heat transfer medium circulation pipeline between the collector and the water tank in the solar water heating system. The heat transfer medium with charged particles moves under the action of the electric field force in the magnetic fluid drive. The magnetic field generator in the magnetic fluid drive generates a magnetic field. The moving charged particles are affected by the Lorentz force in the magnetic field and move along the heat transfer medium circulation pipeline to drive the heat transfer medium to flow. The magnetic fluid drive is controlled by a controller. According to the actual working conditions and the water temperature change in the water tank, the size and direction of the electric field in the magnetic fluid drive are controlled, the size and direction of the Lorentz force are changed, and the flow direction and flow speed of the heat transfer medium are controlled. Since the solar water heating system itself has self-circulation of the heat transfer medium, the circulation flow of the heat transfer medium will be strengthened or suppressed, and a heat transfer medium circulation mode that fully utilizes solar energy will be obtained.

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