Self-powered floor heating water temperature meter based on water friction nanometer power generation

Abstract

The invention provides a self-powered floor heating water temperature gauge based on water friction nanometer power generation, and relates to the field of micro energy collection in intelligent buildings, and the self-powered floor heating water temperature gauge comprises an energy storage module and an energy conversion module which are located in the floor heating water temperature gauge, and an energy collection module which is installed on a floor heating pipeline, the energy collection module is a pipeline water energy collection device based on a triboelectric nano-generator, the triboelectric nano-generator comprises a PTFE pipeline and an annular conductive metal electrode, the energy collection module is connected with the energy storage module through the energy conversion module, and the energy storage module is used for providing electric energy for operation of the floor heating water temperature gauge. Domestic floor heating water energy can be fully utilized and converted into energy of the floor heating water temperature gauge to be provided, and the self-power-supply effect is achieved.

Description

Technical Field

[0001] The present invention relates to a micro energy collection device in an intelligent building, and particularly to a self-powered floor heating water temperature meter based on water friction nanogenerator. Background Art

[0002] Water energy is one of the most promising renewable and clean energies. Compared with solar energy and wind energy, the energy provided by water is much less dependent on seasons, weather, and temperature. Traditional water energy collection methods based on electromagnetic induction mainly focus on collecting energy from rivers and oceans, which requires the construction of large-scale water conservancy projects. There is a large amount of flowing water everywhere in our daily life, which can provide continuous energy. The triboelectric nanogenerator is a powerful micro energy collection technology based on the combination of triboelectrification and electrostatic induction, with the advantages of high efficiency, low cost, and simple configuration.

[0003] Flowing water can provide two kinds of energy. The first is mechanical energy, and the second is electrostatic energy transferred under the time-varying interface state between air or pipelines. Designing a simple-structured triboelectric nanogenerator to collect energy from flowing water through triboelectrification at the liquid / solid interface and convert water energy into available electric energy for powering the floor heating water temperature meter is feasible.

[0004] The triboelectric nanogenerator can convert many distributed high-entropy low-frequency energies existing in the environment into effective electric energy. In addition, the triboelectric nanogenerator can be designed into various shapes and sizes, so it can be more easily installed in various devices and structures. Besides the advantage of flexibility, the triboelectric nanogenerator is usually made of relatively inexpensive materials and has simple components, which also makes it have lower manufacturing costs and maintenance costs. Summary of the Invention

[0005] Aiming at the defects existing in the existing water energy collection technology, the present invention provides a self-powered floor heating water temperature meter based on water friction nanogenerator, which solves the problem of the energy requirement for collecting the energy of flowing water in household pipelines to supply the floor heating water temperature meter. The technical solution is as follows: A self-powered floor heating water temperature meter based on water friction nanogenerator includes an energy storage module, an energy conversion module located inside the floor heating water temperature meter, and an energy collection module installed on the floor heating pipeline. The energy collection module is a pipeline water energy collection device based on a triboelectric nanogenerator. The triboelectric nanogenerator includes a PTFE tube and a ring-shaped conductive metal electrode. The energy collection module is connected to the energy storage module through the energy conversion module. The energy storage module provides electric energy for the operation of the floor heating water temperature meter.

[0006] The PTFE tube forms one section of the floor heating pipeline, and its two ends are sealed and connected to the conventional floor heating pipeline through flange interfaces. High-temperature resistant rubber gaskets are arranged at the flange interfaces, and stainless steel clamps are installed on the outer wall of the pipeline.

[0007] The length of the PTFE tube is 10cm~18cm, and the inner diameter is consistent with the floor heating pipe. Three sections of conductive metal electrodes are arranged in a ring on the inner wall of the PTFE tube. The width of the conductive metal electrodes is 8mm~12mm, the thickness is 0.3mm~0.6mm, the distance between adjacent electrodes is 1cm~3cm, and they are connected in parallel by silver-plated copper wire.

[0008] The conductive metal electrode material is electrolytic copper foil, and the multi-segment electrode configuration can improve the energy collection efficiency.

[0009] The energy harvesting module is wrapped with a double-layer silicone insulating sleeve on the outside, and an aluminum foil shielding layer is attached to the outer layer to suppress electromagnetic interference.

[0010] The energy storage module includes a voltage stabilizing module and a battery pack. The battery pack is connected to the energy conversion module through the voltage stabilizing module. The voltage stabilizing module is used to receive the electric energy converted by the piezoelectric transducer and convert the electric energy into a stable voltage. The battery pack is used to receive the stable voltage converted by the voltage stabilizing module.

[0011] The energy conversion module is integrated with an ultra-low power consumption boost converter, which collects the input current of the energy collection module to charge the battery pack of the water temperature meter.

[0012] The conductive metal electrodes in the energy collection module are connected to the energy conversion module through wires. When the conductive metal electrodes generate current, the current is transmitted to the energy conversion module through the wires. In the energy conversion module, the current first enters an ultra-low power consumption boost converter. The converter can boost the low voltage current to a suitable voltage level.

[0013] The energy storage module has a built-in overcharge protection chip DW01, which cuts off the charging circuit when the battery voltage is ≥4.2V and discharges excess charge through a bypass resistor.

[0014] In the initial state of the friction nanogenerator, the flowing water interacts with the PTFE tube, which extracts electrons from the water and retains a layer of negative bound charge for a long time. Due to electrostatic induction, the conductive metal electrode is positively charged to maintain electrical balance. Once water approaches the metal electrode, electrons are transferred from the ground to the metal electrode, resulting in leakage of the edge electric field. The metal electrode is of limited size, thereby generating instantaneous current. The water continues to flow through the pipe, and the friction nanogenerator can continuously provide current output.

[0015] The self-powered floor heating water temperature meter based on water friction nanogenerator does not involve complex mechanical structures or devices. It collects energy from flowing water through triboelectrification at the liquid / solid interface, converts water energy into available electrical energy to supply the power requirement of the floor heating water temperature meter, and solves problems such as pollution and working life of disposable dry batteries. By making full use of the electrostatic energy generated by the friction between water and pipes and the simple and reliable characteristics of the friction nanogenerator itself, the present invention realizes the energy supply of the self-powered floor heating water temperature meter, making the whole system more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings: Figure 1 is a schematic structural diagram of the self-powered floor heating water temperature meter based on water friction nanogenerator; Figure 2 is the Figure 1 schematic structural diagram of the energy collection module numbered A therein; Figure 3 is a schematic circuit diagram of the energy conversion module; The labels in the figure are as follows: 1 - energy collection module; 2 - energy conversion module; 3 - energy storage module; 4 - floor heating water temperature meter; 5 - voltage stabilization module; 6 - PTFE tube; 7 - conductive metal electrode; 8 - battery pack. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application. The following will further elaborate on the embodiments of the present invention with reference to the drawings.

[0018] As Figure 1As shown, the self-powered floor heating water temperature meter based on water friction nanogenerator collects energy from flowing water through triboelectrification at the liquid / solid interface based on the water friction nanogenerator, converts water energy into available electric energy to supply the electric energy required by the floor heating water temperature meter, and solves the problems such as pollution and working life existing in disposable dry batteries. It includes an energy storage module 3 and an energy conversion module 2 located inside the floor heating water temperature meter 4, and an energy collection module 1 installed on the floor heating pipeline. The energy collection module 1 is a pipeline water energy collection device based on a triboelectric nanogenerator, including Figure 2 the PTFE tube 6 and the conductive metal electrode 7 as shown. The energy collection module 1 is connected to the energy storage module 3 through the energy conversion module 2, and the energy storage module 3 is used to provide electric energy for the operation of the floor heating water temperature meter 4.

[0019] The energy collection module 1 is used to convert the water energy flowing in the floor heating pipeline into available electric energy for collection. It is located on the inner wall of the pipeline and is connected to the energy conversion module inside the base meter of the floor heating water temperature meter through a high-efficiency electric wire. The outside of the energy collection module 1 is wrapped with a double-layer silicone insulation sleeve, and an aluminum foil shielding layer is added on the outer layer to suppress electromagnetic interference.

[0020] The energy collection module 1 is located in the floor heating pipeline. A triboelectric nanogenerator is formed by the PTFE tube 6 and the conductive metal electrode 7. The PTFE tube forms a section of the floor heating pipeline, and its two ends are hermetically connected to the conventional floor heating pipeline (such as PE-X, PB, PE-RT, PPR, etc.) through flange interfaces. A high-temperature resistant rubber gasket is set at the flange interface to ensure water flow tightness; a stainless steel clamp is installed on the outer wall of the pipeline to enhance mechanical stability, so as to ensure fluid continuity and structural strength. The material of the PTFE tube 6 is polytetrafluoroethylene (abbreviated as PTFE), also known as Teflon, which is a high molecular polymer obtained by polymerizing tetrafluoroethylene as a monomer, with the chemical formula (C2F4)n. It has excellent heat resistance and cold resistance and can be used for a long time at -180 to 260 °C. Its friction coefficient is relatively low compared with most solid materials.

[0021] The length of the PTFE tube 6 is 15 cm, and its inner diameter is the same as that of the floor heating pipeline. Three conductive metal electrodes are arranged annularly on the inner wall of the PTFE tube. The width of the conductive metal electrode is 10 mm, and the thickness is 0.5 mm. The distance between adjacent electrodes can be set to 2 cm and is connected in parallel through silver-plated copper wires. The PTFE tube 6 can cooperate with the conductive metal electrode to collect water energy to generate electric energy and realize self-power supply, which is a unique function not possessed by other commonly used floor heating pipeline materials. This function enables the energy collection module based on the PTFE tube to provide continuous power supply for devices such as floor heating water temperature meters without an external power supply, not only saving energy but also improving the independence and reliability of the system.

[0022] The PTFE tube and the conductive metal electrode are based on the working principle of frictional electrification and electrostatic induction coupling. In the initial state, the flowing water interacts with the PTFE tube 6. Due to the inherent properties of the insulating polymer, the PTFE tube extracts electrons from the water and retains a layer of negative bound charges for a long time. Due to electrostatic induction, the conductive metal electrode 7 becomes positively charged to maintain electrical balance. Once the water approaches the metal electrode, electrons will transfer from the ground to the conductive metal electrode 7, and since the conductive metal electrode 7 has a finite size, an instantaneous current is generated. When the water flow continuously passes through this area, continuous current output can be achieved. Specifically, the material of the conductive metal electrode 7 is selected as electrolytic copper foil (purity ≥ 99.9%).

[0023] As Figure 3 shown, the energy conversion module 2 integrates an ultra-low power boost converter to collect the input current of the energy harvesting module 1 and charge the battery pack 8 of the water temperature gauge, that is, the lithium-ion battery inside the water temperature gauge. After the energy conversion module 2 is started, it can convert the direct current collected by the energy harvesting module 1 and use an ultra-low power boost converter to achieve the operation of charging the lithium-ion battery. This module is located inside the base meter of the water temperature gauge.

[0024] The conductive metal electrode 7 in the energy harvesting module 1 is connected to the energy conversion module 2 through a wire. When the conductive metal electrode 7 generates a current, the current is transmitted to the energy conversion module 2 through the wire. In the energy conversion module 2, the current first enters the ultra-low power boost converter. This converter can raise the low-voltage current to a suitable voltage level to meet the power consumption requirements of subsequent devices. After a series of rectification and boost processes such as the rectification module and the boost conversion module, finally the electrical energy is delivered to the battery pack of the water temperature gauge for charging, providing a stable power source for the normal operation of the water temperature gauge.

[0025] The energy storage module 3 includes a voltage stabilization module 5 and a battery pack 8. The battery pack 8 is connected to the energy conversion module 2 through the voltage stabilization module 5. The voltage stabilization module 5 is used to receive the electrical energy converted by the piezoelectric transducer and convert the electrical energy into a stable voltage. The battery pack 8 is used to receive the stable voltage converted by the voltage stabilization module 5. Further, the battery pack 8 is formed by connecting multiple batteries in series and is connected to the voltage stabilization module 5 to receive the stable electrical energy converted by the voltage stabilization module 5 and store it in the battery pack in the form of chemical energy. Specifically, the battery pack 30 is a lithium-ion battery, and the lithium-ion battery supports multiple external charging operations and provides energy support for the water temperature gauge.

[0026] The energy conversion module 2 is integrated inside the water temperature gauge. Its functions include rectification, boosting, and charging to ensure the effective utilization of triboelectricity. It includes a rectification module, a boost conversion module, and a control module inside. The rectification module converts the AC signal output by the triboelectric nanogenerator into a DC signal. The boost conversion module adjusts the voltage of the triboelectric nanogenerator to a suitable charging voltage (4.2V for the lithium battery). The control module mainly includes a POR module (voltage startup judgment), a ZCS module (zero-current switch), and a hysteresis comparator. These modules cooperate with each other to achieve the boost control logic under ultra-low power consumption.

[0027] The control module needs to work properly under a certain power supply voltage. The POR module mainly detects the magnitude of the supply voltage VDD of the control module to control the startup of the control module. The hysteresis comparator detects the magnitude of the voltage VDD to judge the energy storage situation of the capacitor C store and decides whether to transfer energy to the load. The ZCS module detects the current of the inductor during the inductor discharge process. When the inductor discharges to zero, TG_P changes from high level to low level.

[0028] The energy storage module 3 is also built-in with an overcharge protection chip DW01. When the battery voltage ≥ 4.2V, it cuts off the charging circuit and discharges the excess charge through a bypass resistor. This part is used to detect whether the lithium-ion battery is fully charged during charging. When it is fully charged, the water temperature gauge will actively stop the charging operation and release the excess charge through the discharging device inside the circuit. To avoid dangerous charging operations on the lithium battery.

[0029] This invention utilizes the working principle of the triboelectric nanogenerator based on the coupling of triboelectrification and electrostatic induction. In the initial state, the flowing water interacts with the PTFE tube 6. Due to the inherent characteristics of the insulating polymer, the PTFE tube extracts electrons from the water and retains a layer of negative bound charges for a long time. Due to electrostatic induction, the conductive metal electrode 7 becomes positively charged to maintain electrical balance. Once the water approaches the metal electrode, electrons will transfer from the ground to the metal electrode, resulting in the leakage of the edge electric field, and the metal electrode has a limited size, thus generating an instantaneous current. When the water is completely aligned with the metal electrode, the transferred charge reaches the maximum amount on the electrode. When the water starts to move away from the electrode, the electrons will flow back to the ground and generate a reverse current. The water continuously flows through the floor heating pipeline, and the triboelectric nanogenerator can continuously provide current output.

[0030] The self-powered floor heating water temperature meter based on water friction nanogenerator does not involve complex mechanical structures or devices. It collects energy from flowing water through triboelectrification at the liquid / solid interface, converts water energy into available electrical energy to supply the electrical energy required by the floor heating water temperature meter, and solves the problems such as pollution and working life existing in disposable dry batteries. By making full use of the static electricity generated by the friction between water and pipes, and the simple and reliable characteristics of the friction nanogenerator itself, the present invention realizes the energy supply of the self-powered floor heating water temperature meter, making the whole system more stable and reliable.

[0031] It should be noted that in this application, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0032] The above are only specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A self-powered floor heating water temperature meter based on water friction nano-power generation, characterized by: It includes an energy storage module, an energy conversion module located inside the floor heating water temperature meter, and an energy collection module installed on the floor heating pipe. The energy collection module is a pipeline water energy collection device based on a triboelectric nanogenerator. The triboelectric nanogenerator includes a PTFE tube and a ring-shaped conductive metal electrode. The energy collection module is connected to the energy storage module through the energy conversion module. The energy storage module is used to provide electricity for the operation of the floor heating water temperature meter.

2. The self-powered floor heating water temperature meter based on water friction nano-power generation according to claim 1 is characterized by: The PTFE tube forms one section of the floor heating pipeline, and its two ends are sealed and connected to the conventional floor heating pipeline through flange interfaces. High-temperature resistant rubber gaskets are arranged at the flange interfaces, and stainless steel clamps are installed on the outer wall of the pipeline.

3. The self-powered floor heating water temperature meter based on water friction nano-power generation according to claim 1 is characterized in that: The length of the PTFE tube is 10cm~18cm, and the inner diameter is consistent with the floor heating pipe. Three sections of conductive metal electrodes are arranged in a ring on the inner wall of the PTFE tube. The width of the conductive metal electrodes is 8mm~12mm, the thickness is 0.3mm~0.6mm, the distance between adjacent electrodes is 1cm~3cm, and they are connected in parallel by silver-plated copper wire.

4. The self-powered floor heating water temperature meter based on water friction nano-power generation according to claim 1 is characterized in that: The conductive metal electrode material is electrolytic copper foil, and the multi-segment electrode configuration can improve the energy collection efficiency.

5. The self-powered floor heating water temperature meter based on water friction nano-power generation according to claim 1 is characterized by: The energy harvesting module is wrapped with a double-layer silicone insulating sleeve on the outside, and an aluminum foil shielding layer is attached to the outer layer to suppress electromagnetic interference.

6. The self-powered floor heating water temperature meter based on water friction nano-power generation according to claim 1 is characterized by: The energy storage module includes a voltage stabilizing module and a battery pack. The battery pack is connected to the energy conversion module through the voltage stabilizing module. The voltage stabilizing module is used to receive the electric energy converted by the piezoelectric transducer and convert the electric energy into a stable voltage. The battery pack is used to receive the stable voltage converted by the voltage stabilizing module.

7. The self-powered floor heating water temperature meter based on water friction nano-power generation according to claim 1 is characterized by: The energy conversion module is integrated with an ultra-low power consumption boost converter, which collects the input current of the energy collection module to charge the battery pack of the water temperature meter.

8. The self-powered floor heating water temperature meter based on water friction nano-power generation according to claim 7 is characterized by: The conductive metal electrode in the energy collection module is connected to the energy conversion module through a wire. When the conductive metal electrode generates current, the current is transmitted to the energy conversion module through the wire. In the energy conversion module, the current first enters an ultra-low power boost converter. The converter is able to boost the current from low voltage to a suitable voltage level.

9. The self-powered floor heating water temperature meter based on water friction nano-power generation according to claim 1 is characterized by: The energy storage module has a built-in overcharge protection chip DW01, which cuts off the charging circuit when the battery voltage is ≥4.2V and discharges excess charge through a bypass resistor.

10. The self-powered floor heating water temperature meter based on water friction nano-power generation according to claim 1 is characterized by: In the initial state of the friction nanogenerator, the flowing water interacts with the PTFE tube, which extracts electrons from the water and retains a layer of negative bound charge for a long time. Due to electrostatic induction, the conductive metal electrode is positively charged to maintain electrical balance. Once water approaches the metal electrode, electrons are transferred from the ground to the metal electrode, resulting in leakage of the edge electric field. The metal electrode is of limited size, thereby generating instantaneous current. The water continues to flow through the pipe, and the friction nanogenerator can continuously provide current output.

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