Device for heating swimming pool by using Fresnel lens

Abstract

The utility model relates to the technical field of swimming pool heating equipment, in particular to a device for heating a swimming pool by using a Fresnel lens, which comprises a thermal converter, the swimming pool, a water circulation system, an optical focusing system and a control system, and the optical focusing system comprises the Fresnel lens, a lens support rod and a lens support; the lens supporting rod is connected with the lens support, a rotating joint is arranged at the top of the lens supporting rod, and the Fresnel lens is arranged on the rotating joint; a spiral heat conduction runner is arranged in the heat converter, and the outer surface of the heat converter is coated with a high-absorptivity coating; the water inlet and the water outlet of the swimming pool are connected with the thermal converter through the water circulation system; the control system controls the optical focusing system to heat the thermal converter. According to the solar swimming pool heating device, the high light energy utilization rate of the Fresnel lens and the high conversion efficiency of the thermal converter are fully utilized, solar energy is converted into heat energy for heating a swimming pool, the problems of high energy consumption and high carbon emission of traditional electric heating and gas heating modes are solved, and energy consumption and environmental pollution are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to swimming pool heating equipment technical field, concretely is a device of swimming pool heating with fresnel lens. BACKGROUND

[0002] In the field of swimming pool heating, the traditional heating methods mainly include electric heating and gas heating, etc., but these technologies have different degrees of limitations in practical application, and it is difficult to meet the comprehensive needs of high efficiency, environmental protection and economy.

[0003] Although the electric heater has the characteristics of convenient installation and precise temperature control, its core problem is that the energy consumption is extremely high. At the same time, the process of obtaining electric energy as secondary energy (such as thermal power generation) still accompanies high carbon emissions, which indirectly weakens environmental protection. The gas heater relies on natural gas or liquefied petroleum gas combustion, which can quickly provide high heat power, but the fuel cost fluctuates sharply, and the carbon emissions are extremely high. For large commercial swimming pools, the annual carbon emissions can reach tens of tons, which is contrary to the global carbon reduction goal.

[0004] These limitations highlight the imbalance between energy efficiency, economy and environmental friendliness of traditional heating methods. Therefore, researching a new heating method that can improve heating efficiency and energy utilization has become a hot spot of current research. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a device for heating swimming pool with fresnel lens, which solves the problems of high energy consumption and heavy pollution of traditional heating methods through optical focusing and efficient heat conversion.

[0006] To achieve the above purpose, the utility model provides the following technical scheme, a device for heating swimming pool with fresnel lens, comprising a heat converter, a swimming pool, a water circulation system, an optical focusing system and a control system,

[0007] The optical focusing system comprises a fresnel lens, a lens support rod and a lens support; the lens support rod is connected with the lens support, the top of the lens support rod is provided with a rotary joint, and the fresnel lens is arranged on the rotary joint;

[0008] The heat converter is internally provided with a spiral heat conduction channel, and the outer surface is coated with a high-absorptivity coating;

[0009] The water inlet and the water outlet of the swimming pool are connected with the heat converter through the water circulation system;

[0010] The control system controls the optical focusing system to heat the heat converter.

[0011] Furthermore, the water circulation system includes several water pipes and several water valves. The pool outlet is provided with a first cold water outlet and a second cold water outlet. The first cold water outlet and the second cold water outlet are each connected to the first cold water inlet and the second cold water inlet of the heat exchanger through a water pipe. The first hot water outlet and the second hot water outlet of the heat exchanger are each connected to the first hot water inlet and the second hot water inlet of the pool through a water pipe, forming a closed loop.

[0012] A water valve is installed near the first cold water outlet, the second cold water outlet, the first hot water inlet, and the second hot water inlet.

[0013] Furthermore, the water pipe is wrapped with an insulation layer to reduce heat loss; the water valve is an electric proportional regulating valve, which is connected in series with the water pipe via a flange.

[0014] Furthermore, the Fresnel lens is a rectangular flat lens made of polycarbonate (PC) or polymethyl methacrylate (PMMA), and there are 10 groups of Fresnel lenses arranged on the top of the lens support.

[0015] Furthermore, the control system includes a light sensor and a temperature sensor, wherein the light sensor is fixed to the side of the lens support and faces the sun.

[0016] The temperature sensor is used to detect the water temperature to adjust the opening of the water valve; multiple temperature sensors are respectively installed on the first cold water outlet, the second cold water outlet, the first hot water outlet, and the second hot water outlet.

[0017] Furthermore, the first and second cold water outlets of the swimming pool are symmetrically arranged on the bottom of the pool, at a height of 100-200mm from the bottom of the pool.

[0018] The first and second hot water inlets of the swimming pool are located at a height of 100-200mm from the bottom of the pool.

[0019] Beneficial effects

[0020] This invention fully utilizes the high light energy utilization rate of Fresnel lenses and the high conversion efficiency of heat converters to convert solar energy into thermal energy for pool heating, avoiding the high energy consumption and high carbon emissions of traditional electric heating and gas heating methods, and greatly reducing energy consumption and environmental pollution.

[0021] By monitoring light intensity and pool water temperature in real time using light and temperature sensors, the opening of the water valve and the angle of the Fresnel lens can be controlled to achieve precise adjustment of the pool water temperature and ensure that the pool water temperature is always kept within the set range. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Fig. 1 This is a front structural view of the device disclosed in this utility model;

[0024] Fig. 2 This is a rear structural view of the device disclosed in this utility model;

[0025] Fig. 3 This is a diagram showing the specific connection structure between the Fresnel lens and the connecting rod.

[0026] In the picture:

[0027] 1-Heat converter; 2-Swimming pool; 3-First cold water outlet; 4-Second cold water outlet; 5-Water valve; 6-Water pipe; 7-First cold water inlet; 8-Second cold water inlet; 9-Light sensor; 10-Lens support; 11-Lens support rod; 12-Fresnel lens; 13-Temperature sensor; 14-First hot water outlet; 15-Second hot water outlet; 16-First hot water inlet; 17-Second hot water inlet. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] To achieve the above objectives, this utility model provides the following technical solution, such as... Figs. 1-3 As shown, a device for heating a swimming pool using a Fresnel lens includes a heat exchanger 1, a swimming pool 2, a water circulation system, an optical focusing system, and a control system.

[0030] like Fig. 3 As shown, the optical focusing system includes at least one set of Fresnel lenses 12. The Fresnel lenses 12 are connected to the lens support 10 via lens support rods 11. A rotary joint is provided at the top of the lens support rods 11, and the Fresnel lenses 12 are mounted on the rotary joint. The rotary joint is a common structure on robotic arms, driven by a motor to achieve horizontal and pitch angle adjustment, used to focus sunlight onto the surface of the heat exchanger 1. For the specific structure and principle of the rotary joint, please refer to the invention patent with patent number CN103817682A, entitled "A Joint-Type Force Feedback Remote Operation Master Hand".

[0031] Fresnel lenses, as highly efficient optical elements, can increase energy density by a thousandfold by focusing parallel light to a focal point. In the field of solar energy utilization, their focusing ratio can reach 100-500 times, and the focal point temperature can reach 200-500℃, providing a heating method for swimming pools.

[0032] The heat converter 1 is a rectangular cavity that stores water for heating. The heat converter 1 is made of a highly conductive material and its outer surface is coated with a high-absorption coating to efficiently convert focused light energy into heat energy.

[0033] The inlet and outlet of pool 2 are connected to heat exchanger 1 through a water circulation system; pool 2 has an additional independent inlet pipe, through which cool water is injected into pool 2 from the outside.

[0034] The control system controls the optical focusing system to heat the heat exchanger 1.

[0035] Furthermore, the water circulation system includes several water pipes 6, several water valves 5, and a water pump that provides water pressure. The outlet end of the pool 2 is provided with a first cold water outlet 3 and a second cold water outlet 4. The first cold water outlet 3 and the second cold water outlet 4 are each connected to the first cold water inlet 7 and the second cold water inlet 8 provided on the heat converter 1 through a water pipe 6. The first hot water outlet 14 and the second hot water outlet 15 provided on the heat converter 1 are each connected to the second hot water inlet 17 and the first hot water inlet 16 provided on the pool 2 through a water pipe 6, forming a closed loop.

[0036] A water valve 5 is installed near the first cold water outlet 3, the second cold water outlet 4, the first hot water inlet 16, and the second hot water inlet 17.

[0037] Furthermore, water pipe 6 is made of high-temperature resistant polyethylene (PE-RT) pipe, with an outer insulation layer to reduce heat loss. Water valve 5 is an electric proportional regulating valve, connected in series with water pipe 6 via a flange. The electric proportional regulating valve dynamically adjusts the water flow rate according to the water temperature. When the water temperature is low, the opening is increased to accelerate water circulation, allowing more water to enter the heat exchanger for heating; when the water temperature is high, the opening is decreased to reduce the water circulation rate, preventing the water temperature from becoming too high, thus precisely controlling the pool water temperature.

[0038] Furthermore, the Fresnel lens 12 is a rectangular flat lens made of polycarbonate (PC) or polymethyl methacrylate (PMMA). The Fresnel lens 12 is an externally purchased product, and its specific structure will not be described in this application. There are 10 sets of Fresnel lenses 12 arranged on the top of the lens support 10.

[0039] Furthermore, the control system includes a light sensor 9 and a temperature sensor 13. The light sensor 9 is used to detect the light intensity and azimuth angle in real time to control the angle of the lens support 11. The light sensor 9 is fixed to the side of the lens support 10 and faces due south (Northern Hemisphere) or due north (Southern Hemisphere) to monitor the incident light intensity and the sun's azimuth in real time. This provides a basis for controlling the angle adjustment of the Fresnel lens 12 and ensures that the Fresnel lens 12 can always collect solar energy to the maximum extent.

[0040] Temperature sensors 13 are used to detect water temperature. Multiple temperature sensors 13 are respectively installed at the first cold water outlet 3, the second cold water outlet 4, the first hot water outlet 14, and the second hot water outlet 15. The temperature sensors 13 detect the pool water temperature and feed the water temperature data back to the PLC control unit. This provides real-time temperature data for the PID control module to adjust the opening of the water valve 5, achieving precise control of the pool water temperature.

[0041] The control system also includes a PLC control unit and an HMI (Human-Machine Interface). The PLC control unit integrates a solar trajectory algorithm and a PID control module. The solar trajectory algorithm calculates the solar altitude angle and azimuth angle based on latitude, longitude, date, and time to drive the motor of the rotating joint on the lens support rod 11 to adjust the angle of the Fresnel lens 12. The PID control module adjusts the opening of the water valve 5 based on the water temperature deviation. The solar trajectory algorithm and PID control module are existing technologies, and their principles will not be described in detail in this application.

[0042] Furthermore, the first cold water outlet 3 and the second cold water outlet 4 of pool 2 are symmetrically arranged on the bottom of the pool, at a height of 100-200mm from the bottom of the pool.

[0043] The first hot water inlet 16 and the second hot water inlet 17 of pool 2 are set at a height of 100-200mm from the bottom of the pool to drive natural convection of the water by utilizing temperature difference to achieve uniform heating.

[0044] The working principle and process are as follows:

[0045] The Fresnel lens 12, under the action of the rotating joint of the lens support rod 11, can achieve horizontal and pitch angle adjustment. The light intensity and azimuth angle are monitored in real time by the light sensor 9, and combined with the solar trajectory algorithm of the PLC control unit, the Fresnel lens 12 is driven to track the sun and focus sunlight onto the surface of the heat exchanger 1. The heat exchanger 1 is made of highly conductive material, and its outer surface is coated with a high-absorption coating, which can efficiently absorb the focused light energy and convert it into heat energy.

[0046] A first and second cold water outlet, symmetrically positioned at the bottom of the pool and 100-200mm above the pool bottom, can draw water at relatively low temperatures. This cold water flows through pipes into the first cold water inlet 7 and the second cold water inlet 8 of the heat exchanger 1. After being heated in the heat exchanger 1, the hot water flows out from the first hot water outlet 14 and the second hot water outlet 15, and then through pipe 6 into the first hot water inlet 16 and the second hot water inlet 17 of the pool 2, 100-200mm above the pool bottom. Simultaneously, the temperature sensor 13 monitors the water temperature of the pool 2 in real time and feeds the data back to the PLC control unit. The PID control module adjusts the opening of the water valve 5 according to the water temperature deviation. When the water temperature is lower than the set value, the opening of the water valve 5 is increased to accelerate the water circulation speed, allowing more water to enter the heat exchanger 1 for heating; when the water temperature is higher than the set value, the opening of the water valve 5 is decreased to reduce the water circulation speed, preventing the water temperature from becoming too high and precisely controlling the water temperature of the pool 2.

[0047] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An apparatus for heating a swimming pool using a Fresnel lens, characterized by: It comprises a heat converter (1), a swimming pool (2), a water circulation system, an optical focusing system and a control system, The optical focusing system comprises a Fresnel lens (12), a lens support rod (11) and a lens support (10); the lens support rod (11) is connected with the lens support (10), the top of the lens support rod (11) is provided with a rotary joint, and the Fresnel lens (12) is arranged on the rotary joint; The heat converter (1) is internally provided with a spiral heat conduction channel, and the outer surface is coated with a high-absorptivity coating; The water inlet and the water outlet of the swimming pool (2) are connected with the heat converter (1) through the water circulation system; The control system controls the optical focusing system to heat the heat converter (1).

2. The device for heating a swimming pool with a Fresnel lens according to claim 1, characterized in that: The water circulation system comprises a plurality of water pipes (6) and a plurality of water valves (5), and the swimming pool (2) is provided with a first cold water outlet (3) and a second cold water outlet (4) at the water outlet end; the first cold water outlet (3) and the second cold water outlet (4) are respectively connected with a first cold water inlet (7) and a second cold water inlet (8) arranged on the heat converter (1) through a water pipe (6), and a first hot water outlet (14) and a second hot water outlet (15) arranged on the heat converter (1) are respectively connected with a second hot water inlet (17) and a first hot water inlet (16) arranged on the swimming pool (2) through a water pipe (6), forming a closed circulation; A water valve (5) is arranged at a position close to the first cold water outlet (3), the second cold water outlet (4), the first hot water inlet (16) and the second hot water inlet (17).

3. The device for heating a swimming pool with a Fresnel lens according to claim 2, characterized in that: The outer layer of the water pipe (6) is wrapped with a heat preservation layer for reducing heat loss of the pipe; the water valve (5) is an electric proportional regulating valve, and the water valve (5) is connected in series on the water pipe (6) through a flange.

4. The apparatus for heating a swimming pool with a Fresnel lens according to claim 1, characterized in that: The Fresnel lens (12) is a rectangular flat lens, and the material is polycarbonate (PC) or polymethyl methacrylate (PMMA); the number of the Fresnel lens (12) is 10 groups, and the Fresnel lens (12) is arranged on the top of the lens support (10).

5. The apparatus for heating a swimming pool with a Fresnel lens according to claim 2, characterized in that: The control system comprises an illumination sensor (9) and a temperature sensor (13); the illumination sensor (9) is fixed to the side of the lens support (10) and faces the sun; The temperature sensor (13) is used for detecting the water temperature to adjust the opening degree of the water valve (5); a plurality of temperature sensors (13) are arranged on the first cold water outlet (3), the second cold water outlet (4), the first hot water outlet (14) and the second hot water outlet (15) respectively.

6. The apparatus for heating a swimming pool with a Fresnel lens according to claim 1, characterized in that: The first cold water outlet (3) and the second cold water outlet (4) of the swimming pool (2) are symmetrically arranged on the pool bottom, and the height from the pool bottom is 100-200 mm; The first hot water inlet (16) and the second hot water inlet (17) of the swimming pool (2) are arranged at a height of 100-200 mm from the pool bottom.

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