Intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology

Abstract

The invention discloses an intelligent cooling umbrella based on an evaporative cooling and fluid self-circulation technology, and relates to the technical field of umbrellas, in particular to the intelligent cooling umbrella based on the evaporative cooling and fluid self-circulation technology, which comprises an umbrella cover, umbrella ribs, a fluid loop, a condenser and an intelligent control system, a micro-channel fluid loop is embedded in the umbrella handle, the umbrella ribs are of hollow structures and used for containing fluid pipelines, the condenser is arranged at the top of the umbrella handle and connected with the fluid loop, and the intelligent control system comprises a temperature sensor, a controller and an executing mechanism and is used for monitoring and adjusting fluid circulation in real time. The micro-channel fluid loop is arranged in the umbrella cover, efficient cooling is achieved through phase-change heat absorption of fluid in the circulation process, meanwhile, the intelligent control system is combined, the cooling intensity is automatically adjusted according to the environment temperature and the requirements of a user, and the umbrella has the advantages of being good in cooling effect, low in energy consumption, portable and the like.

Description

Technical Field

[0001] This invention relates to the field of umbrella technology, specifically to an intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology. Background Technology

[0002] In high-temperature environments, traditional umbrellas offer only limited sunshade and cannot effectively reduce the temperature around the user, causing discomfort even in hot weather. While some umbrellas on the market have cooling functions, most suffer from poor cooling effects, high energy consumption, and complex structures. For example, some air-conditioning umbrellas using compressor cooling are bulky, heavy, and require an external power source, making them inconvenient to use; while some simple misting umbrellas offer short-lasting cooling and require frequent rehydration.

[0003] Therefore, developing a high-efficiency, energy-saving, and portable cooling umbrella is of significant practical importance.

[0004] (1) Spray cooling umbrella: By adding a micro-spray device to the umbrella surface, water is atomized and the water evaporates to absorb heat and remove heat. However, this type of umbrella depends on an external water source, and the cooling effect is significantly affected by the ambient humidity - the evaporation efficiency drops sharply in high humidity environments, and the weight of the umbrella surface may even increase and the portability may decrease due to water mist adhesion;

[0005] (2) Semiconductor cooling umbrella: Utilizing the Peltier effect, a semiconductor cooling chip is used to locally generate low temperatures on the umbrella surface. However, the semiconductor cooling chip requires a continuous power supply, which not only increases the size and weight of the umbrella, but also has problems such as short battery life and high heat generation due to high power operation, making it difficult to meet the needs of daily long-term use;

[0006] (3) Phase change material cooling umbrella: Phase change energy storage material is filled into the umbrella surface or the umbrella ribs to absorb heat through the phase change of the material. However, the energy storage density of phase change material is limited, and the cooling process is one-time, so it cannot achieve continuous cooling and has low practicality. Summary of the Invention

[0007] The purpose of this invention is to provide an intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology. By setting a microchannel fluid circuit inside the umbrella surface, efficient cooling is achieved by utilizing the phase change heat absorption of the fluid during the circulation process. At the same time, combined with an intelligent control system, the cooling intensity is automatically adjusted according to the ambient temperature and user needs. It has the advantages of good cooling effect, low energy consumption, and portability.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology, comprising an umbrella canopy, umbrella ribs, a fluid circuit, a condenser, and an intelligent control system. The umbrella canopy is made of a high thermal conductivity material and has a microchannel fluid circuit embedded inside. The umbrella ribs are hollow to accommodate fluid pipes. The condenser is located at the top of the umbrella handle and is connected to the fluid circuit. The intelligent control system includes a temperature sensor, a controller, and an actuator for real-time monitoring and adjustment of the fluid circulation. The condenser uses a 5V fan for cooling, and electricity is provided by a solar thin film.

[0009] Furthermore, the fluid in the fluid circuit is an environmentally friendly fluorinated liquid or modified ethanol.

[0010] Furthermore, the condenser has a finned structure and its surface is coated with a hydrophobic coating.

[0011] Furthermore, the intelligent control system automatically adjusts the fluid circulation speed based on the signal fed back from the temperature sensor.

[0012] Furthermore, the fluid circuit has microchannels distributed in a serpentine pattern inside the umbrella surface, which increases the heat exchange efficiency by increasing the length of the fluid flow path.

[0013] Furthermore, the hollow structure of the umbrella rib is provided with a spiral guide groove on its inner wall to guide the fluid to flow directionally along the umbrella rib axis and reduce flow resistance.

[0014] Furthermore, the condenser is tightly attached to the top of the umbrella handle via thermally conductive silicone, utilizing the high thermal conductivity of the umbrella handle material itself to assist in heat transfer.

[0015] Furthermore, the actuator is a micro pump driven by a brushless DC motor, which achieves precise control of the fluid circulation speed by adjusting the rotation speed.

[0016] Furthermore, the inlet end of the fluid circuit is connected to the outlet end of the condenser through a pipe inside the umbrella frame, and the outlet end is directly connected to the inlet end of the condenser to form a closed self-circulating path.

[0017] Furthermore, the inner surface of the umbrella surface in contact with the microchannel fluid circuit is provided with a nanoscale thermally conductive particle reinforcement layer, which reduces the temperature difference between the fluid and the umbrella surface by increasing the contact thermal resistance.

[0018] This invention provides an intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology, which has the following beneficial effects:

[0019] 1. High-efficiency cooling: It utilizes the latent heat of vaporization of the fluid to absorb heat from the umbrella surface and the surrounding environment, effectively reducing the temperature under the umbrella.

[0020] 2. Intelligent adjustment: The system monitors the ambient temperature in real time through a temperature sensor and automatically adjusts the fluid circulation speed to achieve precise cooling.

[0021] 3. Portable design: The overall structure is compact and lightweight, making it easy to carry and use.

[0022] 4. Energy-saving and environmentally friendly: No external power supply is required. Cooling is achieved through fluid self-circulation, resulting in low energy consumption and environmental friendliness. Attached Figure Description

[0023] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a structural schematic diagram of the fluid circuit of the present invention;

[0026] Figure 3 This is a plan view of the overall structure of the present invention.

[0027] Example 1

[0028] This embodiment provides an intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology, with the following specific structure:

[0029] The umbrella canopy 1 is made of high thermal conductivity aluminum alloy, with a serpentine microchannel fluid circuit 3 embedded inside. The contact area between the microchannels and the inner surface of the umbrella canopy is reinforced with nano-diamond thermally conductive particles to reduce the temperature difference in heat exchange between the fluid and the umbrella canopy. The umbrella ribs 2 are hollow stainless steel tubes with spiral guide grooves machined on the inner wall to guide the fluid to flow axially along the umbrella ribs and reduce flow resistance. The internal pipes of the umbrella ribs connect the liquid inlet end of the fluid circuit to the liquid outlet end of the condenser 4, and the liquid outlet end is directly connected to the liquid inlet end of the condenser to form a closed self-circulating path.

[0030] The fluid filled in fluid circuit 3 is an environmentally friendly fluorinated liquid with low viscosity and high latent heat of vaporization. The condenser 4 adopts a finned structure and is coated with a hydrophobic nano-silica coating to prevent condensate from adhering and affecting heat dissipation. The condenser is tightly attached to the carbon fiber umbrella handle at the top of the umbrella handle through thermally conductive silicone, and the high thermal conductivity of the umbrella handle helps to transfer heat to the external environment.

[0031] The intelligent control system 5 includes a temperature sensor 51 installed on the inner surface of the umbrella canopy, a controller 52 integrated into the umbrella handle, and a micro pump 53 driven by a brushless DC motor. When the temperature sensor detects that the umbrella canopy temperature is higher than 30°C, the controller sends a command to the micro pump to increase its speed to 8000 rpm, accelerating the flow rate of the fluorinated liquid in the microchannel and rapidly reducing the umbrella canopy temperature through evaporative heat absorption. When the temperature drops below 25°C, the pump speed drops to 3000 rpm to maintain the basic cooling requirements, thus achieving automatic adjustment of the fluid circulation speed.

[0032] Example 2

[0033] Based on Example 1, this embodiment focuses on optimizing the fluid loop layout and umbrella surface heat exchange efficiency. The specific improvements are as follows:

[0034] The canopy 1 is made of graphene composite high thermal conductivity material, and the internal microchannel fluid circuit 3 is distributed in a double-layer serpentine pattern. The outer layer of microchannels is close to the outer surface of the canopy, and the inner layer of microchannels is close to the inner surface of the canopy. The heat exchange efficiency is improved by increasing the length of the fluid flow path. The spiral guide grooves on the inner wall of the hollow structure of the canopy rib 2 adopt a gradually changing pitch design. The pitch is larger near the root of the canopy handle and smaller near the tip of the canopy. This matches the pressure change of the fluid flowing from the canopy handle to the tip of the canopy, further reducing the flow resistance.

[0035] The fluid filled in fluid loop 3 is modified ethanol, with its boiling point adjusted to 45℃. It evaporates easily at room temperature and has a higher latent heat of vaporization. The condenser 4 retains its finned structure, but the fin spacing is reduced to 1.5mm, and a superhydrophobic fluorocarbon coating is applied to its surface to enhance the rapid dripping of condensate. The condenser is attached to the magnesium alloy umbrella handle at the top of the handle using thermally conductive silicone, leveraging the high thermal conductivity of magnesium alloy to accelerate heat dissipation.

[0036] The temperature sensor 51 of the intelligent control system 5 is a flexible thin-film sensor, which is evenly distributed on the inner surface of the umbrella surface to collect temperature data at various points on the umbrella surface in real time. The controller 52 has a built-in PID algorithm to dynamically adjust the speed of the micro pump 53 according to the uniformity of the temperature distribution. If the temperature in a local area rises abnormally, the flow rate of the microchannel fluid in the corresponding area will be increased by 20% to achieve precise temperature control.

[0037] Example 3

[0038] This embodiment focuses on the self-circulation stability and energy-saving characteristics under extreme environments, and the specific structure is as follows:

[0039] The umbrella surface 1 is made of carbon fiber reinforced polymer material, and the cross-section of the internal microchannel fluid circuit 3 is elliptical, which increases the heat exchange area by 15% compared to a circular cross-section. The surface of the spiral guide grooves on the inner wall of the hollow structure of the umbrella rib 2 is polished to reduce turbulence loss of fluid flow.

[0040] The fluid filled in fluid loop 3 is low-boiling-point modified ethanol, suitable for evaporation requirements in high-temperature and high-humidity environments. The condenser 4 adopts a finned structure with a 30° fin tilt angle. Combined with the air guide groove at the top of the umbrella handle, it utilizes natural wind to accelerate airflow over the condenser surface, improving condensation efficiency. The condenser is bonded to the titanium alloy umbrella handle at the top of the handle using thermally conductive silicone. The low density and high thermal conductivity of the titanium alloy balance lightweight design with heat dissipation requirements.

[0041] The actuator 53 of the intelligent control system 5 is a brushless DC motor micro-pump with a speed range of 2000-10000 rpm, and its power is adjusted via PWM signal. The temperature sensor 51 is located at the center of the umbrella surface. When the detected temperature exceeds 35°C, the pump runs at its maximum speed, forcing the fluid to circulate rapidly and evaporate for cooling. When the temperature is below 28°C, the pump switches to intermittent mode, maintaining only a slow flow of fluid in the loop to avoid excessive power consumption. In addition, the liquid inlet of the fluid loop and the liquid outlet of the condenser are connected through a PEEK pipe inside the umbrella rib, utilizing the chemical resistance and high-temperature resistance of the PEEK material to ensure the reliability of the system.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart cooling umbrella based on evaporative cooling and fluid self-circulation technology, comprising an umbrella canopy (1), umbrella ribs (2), a fluid circuit (3), a condenser (4), and a smart control system (5), characterized in that: The umbrella surface (1) is made of a high thermal conductivity material and has a microchannel fluid circuit (3) embedded inside. The umbrella ribs (2) are hollow structures used to accommodate fluid pipes. The condenser (4) is located at the top of the umbrella handle and is connected to the fluid circuit (3). The intelligent control system (5) includes a temperature sensor (51), a controller (52), and an actuator (53) for real-time monitoring and regulation of fluid circulation. The condenser (4) uses a 5V fan for cooling and is powered by solar thin film.

2. The intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology according to claim 1, characterized in that: The fluid in the fluid circuit (3) is an environmentally friendly fluorinated liquid or modified ethanol.

3. The intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology according to claim 1, characterized in that: The condenser (4) has a finned structure and is coated with a hydrophobic coating.

4. The intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology according to claim 1, characterized in that: The intelligent control system (5) automatically adjusts the fluid circulation speed based on the signal fed back by the temperature sensor.

5. The intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology according to claim 1, characterized in that: The fluid circuit (3) has microchannels distributed in a serpentine pattern inside the umbrella surface (1), which increases the heat exchange efficiency by increasing the length of the fluid flow path.

6. The intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology according to claim 1, characterized in that: The hollow structure of the umbrella rib (2) is provided with a spiral guide groove on the inner wall to guide the fluid to flow directionally along the umbrella rib axis and reduce flow resistance.

7. The intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology according to claim 1, characterized in that: The condenser (4) is tightly attached to the top of the umbrella handle by thermally conductive silicone, and the high thermal conductivity of the umbrella handle material itself is used to assist in heat transfer.

8. The intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology according to claim 1, characterized in that: The actuator (53) is a micro pump driven by a brushless DC motor, which achieves precise control of the fluid circulation speed by adjusting the rotation speed.

9. The intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology according to claim 1, characterized in that: The inlet end of the fluid circuit (3) is connected to the outlet end of the condenser (4) through a pipe inside the umbrella rib (2), and the outlet end is directly connected to the inlet end of the condenser (4) to form a closed self-circulating path.

10. The intelligent cooling umbrella based on evaporative cooling and fluid self-circulation technology according to claim 1, characterized in that: The inner surface of the umbrella surface (1) is provided with a nano-level thermally conductive particle reinforcement layer in the contact area with the microchannel fluid circuit (3), which reduces the temperature difference of heat exchange between the fluid and the umbrella surface by increasing the contact thermal resistance.

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