A dust removal device for a Fresnel solar collector

Abstract

The present invention provides a dust removal device for a Fresnel solar collector, belonging to the technical field of dust removal for Fresnel collectors; it includes a frame body, a wind source, a negative ion generating device and an air duct. The protective air flow is responsible for cleaning the dust accumulated on the surface of the Fresnel lens. The negative ion air flow duct is equipped with negative ions, which can cause small dust in the air to actively coagulate and settle, forming larger dust and blowing it away. Moreover, the protective air flow duct is located below, which can prevent the charged dust from detaching from the negative ion air flow and adsorbing on the surface of the Fresnel lens, and can also blow away the large dust that has not been blown away by the ion air flow; preventing impurities from affecting the light collection and light transmission effects of the Fresnel lens, effectively improving the utilization rate of the Fresnel solar collector; setting a flushing air flow to specifically remove dust from the grooves of the Fresnel lens, effectively cleaning the impurities in the grooves and gaps of the Fresnel lens, making the dust removal effect of the device better.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal for Fresnel heat collection devices, and particularly to a dust removal device for a Fresnel solar heat collection device. Background Art

[0002] In the field of solar concentration, Fresnel lenses are used to make solar concentrators. Fresnel lenses are planarized condenser lenses, which are light in weight and relatively low in price. They are used in concentrating solar cell power generation systems, and the foci of Fresnel lenses just fall on solar chips. When the lens surface is vertically facing the sun, light will be focused on the battery chips, gathering more energy. Therefore, a smaller battery chip area is required, greatly saving costs. Fresnel lenses are mostly thin sheets injection-molded from polyolefin materials, and some are made of glass. One side of the lens surface is a smooth surface, and the other side is engraved with concentric circles from small to large. Its texture is designed according to the principles of light interference and diffraction, as well as relative sensitivity and acceptance angle requirements. As shown in the appendix Figure 1 As shown, in cross-section, its surface consists of a series of serrated grooves, and the central part is an elliptical arc. Each groove has a different angle from adjacent grooves, but all concentrate light in one place to form the central focus, that is, the focus of the lens. Each groove can be regarded as an independent small lens, which adjusts light into parallel light or convergent light. This kind of lens can also eliminate part of the spherical aberration, improving the light utilization rate of the Fresnel lens.

[0003] The prior art Chinese patent CN106766240B discloses a solar furnace device, including a furnace body, a collector arranged on the heat collection plane of the furnace body, the collector being connected to a heat-using device; a condensing device for concentrating sunlight on the collector, the condensing device being a fixed-focus Fresnel lens; an adjusting device for controlling the rotation and fixation of the condensing device around the furnace body so that the condensing device always faces the sun, the adjusting device being connected to the furnace body; the adjusting device includes a solar hour angle rotating frame and a rotating motor arranged on the furnace body, and a controller with a date calculator for performing date adjustment on the declination adjusting device. In this solar furnace device, the Fresnel lens serves as a condensing device on the solar heat collection device and is an important part of the heat collection device.

[0004] The prior art Chinese patent CN115333450A discloses a six-link type sunlight tracking solar power generation device, including a six-link mechanism, an induction light detection system, a drive system, a Fresnel lens, a fixing frame, a rotatable base, and a Stirling engine. The fixing frame has two layers, including a top plate and a lens mounting frame. The Fresnel lens is fixedly connected to the lens mounting frame. The Stirling engine is fixedly connected to the top plate. The focal point of the Fresnel lens is located on the heating surface of the Stirling engine. The induction light detection system includes two photoelectric induction sensors. Among them, the first photoelectric induction sensor is fixedly connected to the lens mounting frame and is in the same plane as the Fresnel lens. The second photoelectric induction sensor is independently installed near the rotatable base. In this solar power generation device, the Fresnel lens focuses sunlight to heat the Stirling engine.

[0005] In a Fresnel type solar heat collection device, the Fresnel lens plays an important role. However, during the use of existing Fresnel type solar heat collection devices, fine dust in the air is too small in volume and weight to automatically settle, and it is difficult to blow it away and remove it with an ordinary fan. Accumulating on the lens for a long time affects its light transmission and heat collection effect, and the dust at the gaps of the Fresnel lens is difficult to clean, reducing the solar energy utilization rate of the entire heat collection device. Summary of the Invention

[0006] To overcome the above technical problems, the present invention provides a dust removal device for a Fresnel type solar heat collection device, including a frame body, a wind source, a negative ion generating device, and an air duct. The frame body is installed on one side of the Fresnel lens. The air duct is installed at one end of the frame body close to the Fresnel lens. The wind source is arranged on the side of the air duct away from the Fresnel lens, and the wind source is communicated with the air duct.

[0007] The air duct includes a protection air flow duct and a negative ion air flow duct. The negative ion air flow duct is located above the protection air flow duct. The negative ion generating end of the negative ion generating device extends into the negative ion air flow duct.

[0008] Preferably, a first air filter and a second air filter are arranged on the side of the wind source away from the air duct, and the first air filter and the second air filter are respectively connected to the frame body.

[0009] Preferably, the first air filter and the second air filter are respectively connected to the frame body through filter mesh channels, and the filter mesh channels are opened on the inner wall of the frame body.

[0010] Preferably, the distance between the first air filter and the second air filter is 3 - 6 cm, and the distance between the wind source and the first air filter is 10 - 15 cm.

[0011] Preferably, the wind source includes a plurality of fans, and the air outlet ends of the fans face the air duct.

[0012] Preferably, the negative ion generating device includes a negative ion housing, a negative ion generator, and a high-voltage needle. The negative ion housing is installed in the frame body. The negative ion generator is arranged inside the negative ion housing. One end of the high-voltage needle is electrically connected to the output end of the negative ion generator, and the other end of the high-voltage needle passes through the negative ion housing and extends into the negative ion air flow duct.

[0013] Preferably, the distance between the high-voltage needle and the air outlet of the negative ion air flow duct is 20 - 30 mm.

[0014] Preferably, a duct separation member is arranged between the protective air flow duct and the negative ion air flow duct, and the duct separation member is connected to the frame body.

[0015] Preferably, one end of the duct separation member close to the air source is an inclined surface, and the inclined surface inclines from top to bottom towards the middle of the duct separation member.

[0016] Preferably, a flushing air flow duct separation member is arranged at the bottom of the protective air flow duct, and the flushing air flow duct separation member is connected to the frame body.

[0017] A plurality of through flushing air flow ducts are formed at the lower end of the flushing air flow duct separation member. The two ends of each flushing air flow duct are respectively an air outlet and an air inlet, and the air outlets of the respective flushing air flow ducts respectively face the respective grooves of the Fresnel lens.

[0018] Preferably, the width of the flushing air flow duct gradually decreases in the direction from the air inlet to the air outlet.

[0019] Preferably, the width of the air outlet is one-third of the width of the air inlet.

[0020] Preferably, the air inlet end of the flushing air flow duct separation member is an inclined surface, and the inclined surface inclines from bottom to top towards the air outlet direction.

[0021] Preferably, the vertical center line of the air outlet is aligned with the groove of the Fresnel lens.

[0022] Preferably, a solar panel is installed above the frame body, and the solar panel is electrically connected to the negative ion generating device and the air source respectively.

[0023] A Fresnel type solar heat collection device includes a Fresnel lens and a heat collection pipe, and further includes the aforementioned dust removal device. The dust removal device is installed at one end of the Fresnel lens.

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

[0025] The present invention provides a dust removal device for a Fresnel type solar heat collection device.

[0026] 1. A protection air flow duct and a negative ion air flow duct are provided to remove dust from the Fresnel lens in the heat collection device. The protection air flow is responsible for cleaning the dust accumulated on the surface of the Fresnel lens. The negative ion air flow duct is equipped with negative ions, which can cause fine dust in the air to actively coagulate, form larger dust particles and be blown away. Moreover, the protection air flow duct is located below, which can prevent charged dust from detaching from the negative ion air flow and adsorbing on the surface of the Fresnel lens, and can also blow away the large dust particles that have not been blown away by the ion air flow. The combined protection air flow and negative ion air flow formed by the two ducts effectively achieve the effects of dust removal and protection, prevent impurities from affecting the light collection and light transmission effects of the Fresnel lens, and effectively improve the utilization rate of the Fresnel solar heat collection device.

[0027] 2. A scouring air flow duct separator and a scouring air flow duct are provided to divide the protection air flow, generate the lowest scouring air flow, and specifically remove dust from the grooves of the Fresnel lens, effectively cleaning the impurities in the grooves and gaps of the Fresnel lens, making the dust removal effect of the device better. The combination of the negative ion air flow, the protection air flow, and the scouring air flow achieves good dust removal and protection effects.

[0028] 3. This device only needs to be installed on the existing heat collection device using a Fresnel lens, does not affect the heat collection of the heat collection device, occupies little space, and can be disassembled and installed at any time according to needs. Description of the Drawings

[0029] Figure 1 Schematic cross-sectional view of the Fresnel lens used in the prior art heat collection device;

[0030] Figure 2 Schematic three-dimensional structure diagram of the present invention;

[0031] Figure 3 Schematic side three-dimensional structure diagram of the present invention;

[0032] Figure 4 Schematic diagram of the structure of the present invention in another side three-dimensional view;

[0033] Figure 5 Schematic diagram of the structure of the present invention in the state of removing the first air filter and the second air filter;

[0034] Figure 6 Schematic cross-sectional view of the internal structure of the present invention;

[0035] Figure 7 Another schematic cross-sectional view of the internal structure of the present invention;

[0036] Figure 8 Schematic three-dimensional structure diagram of the scouring air flow duct separator of the present invention;

[0037] Figure 9Schematic three-dimensional structure diagram of another scouring air duct separator of the present invention;

[0038] Figure 10 Schematic bottom view of the scouring air duct;

[0039] Figure 11 Schematic diagram of one relative position of the air outlet and the groove;

[0040] Figure 12 Schematic diagram of another relative position of the air outlet and the groove;

[0041] Wherein: 100, Fresnel lens; 200: groove; 300, heat collection tube; 400, heat collection device frame;

[0042] 1, frame body; 2, air source; 3, negative ion generating device; 4, air duct; 5, protection air duct; 6, negative ion air duct; 7, air duct separator; 8, scouring air duct separator; 9: solar panel;

[0043] 201, fan; 202, first air filter; 203, second air filter; 204, filter trough;

[0044] 301, negative ion housing; 302, negative ion generator; 303, high-voltage needle;

[0045] 801, scouring air duct; 802, air outlet; 803, air inlet. Detailed implementation mode

[0046] The accompanying drawings are only for illustrative purposes and should not be construed as limiting the present patent. For a better illustration of the present embodiment, some components in the drawings may be omitted, enlarged or reduced, which do not represent the dimensions of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. In the description of the present invention, it should be understood that the orientation or positional relationships indicated by terms such as "left side", "right side", "upper part", "lower part", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not represent the importance of the components, so they should not be construed as limiting the present invention. In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. The specific dimensions adopted in this embodiment are only for illustrative purposes of the technical solution and do not limit the protection scope of the present invention.

[0047] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0048] Embodiment 1:

[0049] As Figures 1-10 shown, a dust removal device for a Fresnel solar collector includes a frame body 1, an air source 2, a negative ion generating device 3 and an air duct 4. The frame body 1 is installed on one side of the Fresnel lens, and the air duct 4 is installed at one end of the frame body 1 close to the Fresnel lens. The air source 2 is arranged on the side of the air duct 4 away from the Fresnel lens, and the air source 2 is communicated with the air duct 4.

[0050] The air duct 4 includes a protection air flow duct 5 and a negative ion air flow duct 6. The negative ion air flow duct 6 is located above the protection air flow duct 5, and the negative ion generating end of the negative ion generating device 3 extends into the negative ion air flow duct 6.

[0051] Reference Figures 2-6, the dust removal device is installed on the Fresnel solar collector device or on one side of the Fresnel solar collector device and connected thereto. Specifically, the frame 1 is installed on one side of the Fresnel lens 100 so that it is in the same state as the Fresnel lens 100. That is, even if the Fresnel lens 100 of the collector device in the prior art changes with the sun's irradiation angle, the frame 1 can change with the angle change of the Fresnel lens 100 so that the frame 1 is in the same plane as it, enabling the air flow in the air duct 4 to flow above the Fresnel lens 100. Specifically, it protects the air flow blown out by the air flow duct 5 to flow on the surface of the Fresnel lens 100, and the air flow blown out by the negative ion generating device 3 flows above the air flow blown out by the air flow duct 5, thereby achieving the effect of protecting the surface of the Fresnel lens 100 from being clean;

[0052] In the specific implementation process, when the negative ion generating device 3 and the air source 2 are turned on, the negative ion generating device 3 can generate negative ions in the air. Negative ions can be used to purify the air. The negative ion generating device 3 can use the device of the prior art. After the negative ion generating device 3 is turned on, since the negative ion generating end of the negative ion generating device 3 extends into the negative ion air flow duct 6, there are negative ions in the negative ion air flow duct 6. When the air flow generated by the air source 2 is blown into the air duct 4, it enters the air flow duct 5 for protection and the negative ion air flow duct 6 respectively. The air outlet position of the air flow duct 5 for protection is located on the surface of the Fresnel lens 100, and the protective air flow blows across the surface of the Fresnel lens 100, blowing away dust and other impurities to keep the surface clean; the air outlet position of the negative ion air flow duct 6 is located above the air flow duct 5 for protection. The blown negative ion air flow makes the fine dust in the air actively coagulate and settle due to the negative ions generated by the negative ion generating device 3, forming larger dust and blowing it away. Due to the protective air flow below, it can prevent the charged dust from detaching from the negative ion air flow and adsorbing onto the surface of the Fresnel lens 100, and can also blow away the large dust that has not been blown away by the negative ion air flow, playing a double-layer protection role. Using the double-layer air flow not only removes the impurities on the lens surface but also effectively and actively removes the dust near the device, and the dust removal effect is good.

[0053] In a further embodiment, an air duct separator 7 is provided between the air flow duct 5 for protection and the negative ion air flow duct 6. The air duct separator 7 is connected to the frame 1. The setting of the air duct separator 7 divides the air duct 4 into the air flow duct 5 for protection and the negative ion air flow duct 6. The air flow blown out by the air source 2 enters the air flow duct 5 for protection and the negative ion air flow duct 6 respectively, sharing one air source 2, effectively saving space and improving utilization rate.

[0054] In a further embodiment, one end of the air duct separator 7 close to the air source 2 is an inclined surface, and the inclined surface is inclined from top to bottom towards the middle of the air duct separator 7. When the air flow from the air source 2 blows out, the air flow in the protective air flow duct 5 below the air duct separator 7, in the direction from the air source 2 to the Fresnel lens 100, due to the setting of the inclined surface of the air duct separator 7, the height of the protective air flow duct 5 gradually decreases, causing the air flow to accelerate. The blown air flow is more conducive to blowing away the impurities on the surface of the Fresnel lens 100. At this time, the flow rate of the protective air flow is greater than that of the negative ion air flow, which is more conducive to preventing the dust carrying charges from detaching from the negative ion air flow and adsorbing onto the surface of the Fresnel lens 100, and can effectively blow away the large dust that has not been blown away by the negative ion air flow.

[0055] In a further embodiment, the maximum height of the protective air flow duct 5 is equal to the height of the negative ion air flow duct 6, and the minimum height of the protective air flow duct 5 is equal to half of the height of the negative ion air flow duct 6.

[0056] In a further embodiment, a solar panel 9 is installed above the frame 1. The solar panel 9 is electrically connected to the negative ion generating device 3 and the air source 2 respectively. By using the solar panel 9 to provide additional power, the power consumption of the power supplies of the negative ion generating device 3 and the air source 2 themselves is reduced, saving energy.

[0057] Embodiment 2:

[0058] As Figures 1-10 shown, in a preferred embodiment, referring to Figure 6 , a first air filter 202 and a second air filter 203 are provided on the side of the air source 2 away from the air duct 6. The first air filter 202 and the second air filter 203 are respectively connected to the frame 1. By using two air filters, the air flows through the first air filter 202 and the second air filter 203 respectively, which can purify the air, keep the air flow blown by the air source 2 clean, reduce the pollution of the air duct 4 by impurities in the air, and prevent the pollution of the Fresnel lens 100.

[0059] In a further embodiment, the first air filter 202 and the second air filter 203 are respectively connected to the frame 1 through filter mesh channels 204. The filter mesh channels 204 are opened on the inner wall of the frame 1. By being movably connected through the filter mesh channels 204, it is convenient to disassemble the first air filter 202 and the second air filter 203 for cleaning and replacement.

[0060] In a further embodiment, the distance between the first air filter 202 and the second air filter 203 is 3 - 6 cm, and the distance between the air source 2 and the first air filter 202 is 10 - 15 cm. The exemplified distances can not only have a good filtering effect but also do not affect the wind speed.

[0061] In a further embodiment, the air source 2 includes a plurality of fans 201. The air outlet ends of the fans 201 face the air duct 4. The fans 201 are used for blowing air. A plurality of fans 201 are provided to meet the width requirement of the air duct 4, and fans 201 of different specifications can be selected according to the need for different wind speeds.

[0062] Embodiment 3:

[0063] As Figures 1-10 shown, in a preferred embodiment, referring to Figure 6 , the negative ion generating device 3 includes a negative ion housing 301, a negative ion generator 302 and a high-voltage needle 303. The negative ion housing 301 is installed in the frame 1. The negative ion generator 302 is provided in the negative ion housing 301. One end of the high-voltage needle 303 is electrically connected to the output end of the negative ion generator 302, and the other end of the high-voltage needle 303 passes through the negative ion housing 301 and extends into the negative ion air flow duct 6.

[0064] In the specific implementation process, the negative ion generator 302 is electrically connected to the high-voltage needle 303, which can be connected by a wire. When working, a negative DC high corona is generated at the tip of the high-voltage needle 303, and a large number of electrons are emitted at high speed, so that a large number of negative ions are generated in the air in the negative ion air flow duct 6; the negative ion housing 301 protects the negative ion generator 302 and the high-voltage needle 303 inside it to prevent accidental touch.

[0065] In a further embodiment, the distance between the high-voltage needle 303 and the air outlet of the negative ion air flow duct 6 is 20 - 30 mm, so that the air blown out by the air source 2 contains negative ions to the greatest extent.

[0066] Embodiment 4:

[0067] As Figures 1-10 shown, in a preferred embodiment, referring to Figures 7-10 , a scouring air flow duct separation member 8 is provided at the bottom of the protection air flow duct 5. The scouring air flow duct separation member 8 is connected to the frame 1.

[0068] A plurality of through scouring air flow ducts 801 are opened at the lower end of the scouring air flow duct separation member 8. The two ends of each scouring air flow duct 801 are respectively an air outlet 802 and an air inlet 803, and the air outlets 802 of each scouring air flow duct 801 respectively face the grooves of the Fresnel lens.

[0069] Since the surface of the Fresnel lens 100 is serrated with grooves 200, also known as slits, it is difficult to clean the dust and other impurities accumulated in the grooves 200, which has a great impact on the utilization rate of solar energy. In this device, a scouring air duct separator 8 is provided at the bottom of the protective air duct 5 to divide the protective air flow into an upper protective air flow and a lower scouring air flow targeting the grooves 200. When the wind blown by the wind source 2 enters the protective air duct 5, the upper air flow continues to blow out to clean the surface of the Fresnel lens 100, such as the elliptical arc position and the protruding position of the serrations. Of course, it also has a cleaning effect on the grooves 200. The lower air flow enters the scouring air duct 801 from the air inlet 803 and blows out from the air outlet 802. Since the position of the air outlet 802 corresponds to each groove 200 of the Fresnel lens 100, it can accurately clean the dust and other impurities inside the grooves 200. Combining the negative ion air flow, the protective air flow and the scouring air flow, the negative ion air flow makes the fine dust in the air actively settle, form larger dust and be blown away. The protective air flow can blow away the large dust that has not been blown away by the ion air flow, clean the dust accumulated on the surface of the Fresnel lens 100, and also prevent the charged dust from detaching from the negative ion air flow and adsorbing on the surface of the Fresnel lens 100. The scouring air flow accurately cleans the grooves 200 on the surface of the Fresnel lens 100. The three-layer air flow combines for dust removal and protection, improving the dust removal effect.

[0070] The number and spacing of the scouring air ducts 801 can be opened according to the specific structure of the Fresnel lens 100. One air outlet 802 can correspond to one groove 200. When the number of grooves 200 is large and dense, one air outlet 802 can correspond to multiple grooves 200 to reduce costs. The key is that the air outlet 802 accurately corresponds to the position where the groove 200 is located, and the blown air flow cleans the position where the groove 200 is located.

[0071] In a further embodiment, the width of the scouring air duct 801 gradually decreases along the direction from the air inlet 803 to the air outlet 802, so that the width of the air duct where the air flow enters gradually decreases, achieving the effect of increasing the wind speed and better blowing and cleaning effect.

[0072] In a further embodiment, the width of the air outlet 802 is one-third of the width of the air inlet 803.

[0073] In a further embodiment, the air inlet end of the scouring air duct separator 8 is an inclined surface, and the inclined surface is inclined from bottom to top towards the air outlet 802. The inclined surface is provided so that the air flow that has not entered the scouring air duct 801 can quickly enter the upper air duct along the inclined surface.

[0074] In a further embodiment, refer to Figure 11, the vertical center line of the air outlet 802 is directly opposite to the groove 200 of the Fresnel lens, that is, directly opposite to the vertical line of the groove 200. Half of the width of the air outlet 802 corresponds to the part between the vertical line and the inclined line of the groove 200, ensuring that the outlet air can effectively blow to the gap;

[0075] Reference Figure 12 , or the 1 / 4 dividing line is directly opposite to the groove 200 of the Fresnel lens 100. Since the groove 200 is close to a triangle, the 1 / 4 dividing line divides the width of the air outlet 802 into 1 / 4 and 3 / 4 parts. Among them, the width of the 3 / 4 part is offset towards the middle position of the Fresnel lens 100, so that the 1 / 4 dividing line coincides with the vertical line of the groove 200, that is, the 3 / 4 width part of the air outlet 802 corresponds to the part between the vertical line and the inclined line of the groove 200, making most of the air outlet 802 correspond to the position of the inclined surface of the groove 200 and a small part correspond to the position of the vertical surface of the groove 200, resulting in a better blowing effect on the groove 200.

[0076] Embodiment 5:

[0077] As Figures 1-10 shown, a Fresnel type solar heat collection device includes a Fresnel lens 100 and a heat collection pipe 300, and also includes the dust removal device of the foregoing embodiment. The dust removal device is installed at one end of the Fresnel lens 100. Specifically, the frame 1 of the dust removal device is installed on the heat collection device frame 400 of the Fresnel type solar heat collection device, and can move along with the moving direction of the Fresnel type solar heat collection device, so that the frame 1 is parallel to the Fresnel lens 100, and the air flow blown out from the air duct 4 is parallel to the Fresnel lens 100, with good dust removal effect.

[0078] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the embodiments of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A dust removal device for a Fresnel solar collector, characterized in that: It includes a frame body (1), a wind source (2), a negative ion generating device (3), and an air duct (4). The frame body (1) is installed on one side of a Fresnel lens. The air duct (4) is installed at one end of the frame body (1) close to the Fresnel lens. The wind source (2) is arranged on the side of the air duct (4) away from the Fresnel lens, and the wind source (2) is communicated with the air duct (4). The air duct (4) includes a protective air flow duct (5) and a negative ion air flow duct (6). The negative ion air flow duct (6) is located above the protective air flow duct (5). The negative ion generating end of the negative ion generating device (3) extends into the negative ion air flow duct (6). The negative ion generating device (3) includes a negative ion housing (301), a negative ion generator (302), and a high-voltage needle (303). The negative ion housing (301) is installed in the frame body (1). The negative ion generator (302) is arranged in the negative ion housing (301). One end of the high-voltage needle (303) is electrically connected to the output end of the negative ion generator (302), and the other end of the high-voltage needle (303) passes through the negative ion housing (301) and extends into the negative ion air flow duct (6). An air duct separator (7) is arranged between the protective air flow duct (5) and the negative ion air flow duct (6), and the air duct separator (7) is connected to the frame body (1). A flushing air flow duct separator (8) is arranged at the bottom of the protective air flow duct (5), and the flushing air flow duct separator (8) is connected to the frame body (1). A plurality of through flushing air flow ducts (801) are opened at the lower end of the flushing air flow duct separator (8). The two ends of each flushing air flow duct (801) are respectively an air outlet (802) and an air inlet (803). The air outlets (802) of the respective flushing air flow ducts (801) are respectively oriented towards the respective grooves of the Fresnel lens. The width of the flushing air flow duct (801) gradually decreases in the direction from the air inlet (803) to the air outlet (802).

2. The dust removal device for a Fresnel solar collector according to claim 1, characterized in that: A first air filter (202) and a second air filter (203) are arranged on the side of the wind source (2) away from the air duct (4), and the first air filter (202) and the second air filter (203) are respectively connected to the frame body (1).

3. The dust removal device for a Fresnel solar collector according to claim 1, characterized in that: The wind source (2) includes a plurality of fans (201), and the air outlet ends of the fans (201) face the air duct (4).

4. The dust removal device for a Fresnel solar collector according to claim 1, characterized in that: One end of the air duct separator (7) close to the wind source (2) is an inclined surface, and the inclined surface inclines from top to bottom towards the middle of the air duct separator (7).

5. The dust removal device for a Fresnel solar collector according to claim 1, characterized in that: The width of the air outlet (802) is one-third of the width of the air inlet (803).

6. A Fresnel solar heat collection device, comprising a Fresnel lens and a heat collection pipe, characterized in that: It further includes a dust removal device as described in any one of claims 1-5, and the dust removal device is installed at one end of the Fresnel lens.

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