A fenestration window and method of using same

Abstract

This invention discloses a Fresnel lens-type heat-concentrating ventilation window and its usage method in the field of building technology. This ventilation window, through its design, focuses sunlight to heat the outer ring of heat-absorbing metal wires, thereby heating the air. The rising hot airflow then pushes double-reversing blades with a dark heat-absorbing coating on the inner side, drawing the hot air out and blowing it into the indoor space. Furthermore, the Fresnel lens-type heat-concentrating ventilation window can rotate 180° along its central longitudinal axis. In summer, the entire window can be flipped indoors, with the other side of the double-reversing blades white and facing outwards, providing some sunlight reflection and shading. It can also be rotated to the desired angle for direct ventilation using wind pressure in summer. The Fresnel lens can also be pulled up to the desired angle to maximize sunlight focus. This heat-concentrating ventilation window can improve indoor thermal environment quality and human comfort without consuming energy.

Description

Technical Field

[0001] This invention relates to a window structure in the field of building technology, specifically a window structure with heat-retaining and ventilation functions. Background Technology

[0002] Energy-saving windows refer to windows that improve airtightness and thermal insulation performance by using technologies such as thermally broken aluminum alloy profiles and double-glazed windows. These windows typically incorporate inert gas filling processes to effectively reduce heat exchange between indoors and outdoors. Existing energy-saving windows generally use double or triple-glazed vacuum-sealed glass, allowing for ample natural light while maintaining thermal insulation. Using Low-E glass can effectively block long wavelengths of light, and adding sunshades such as louvers can further prevent overheating indoors. The application of high-efficiency energy-saving windows can significantly reduce the energy consumption of building envelopes, playing a crucial role in building energy-saving renovations and carbon emission reduction. Passive windows acquire and utilize natural energy through natural processes. To design energy-saving windows with practical value, solar energy utilization technologies can be integrated into the window structure.

[0003] Fresnel lens technology is a design approach that allows lenses to be lighter and thinner. It eliminates as much optical material as possible while preserving surface curvature, collapsing a continuous surface onto a single plane, thus making the lens lighter and thinner. The lens surface consists of a series of serrated grooves with an elliptical arc at the center. Each groove has a different angle from its adjacent grooves, but all converge light to form a central focal point, the lens's focal point. Each groove can be considered an independent microlens, adjusting the light into parallel or focused light.

[0004] A dual-reverse fan refers to a fan frame containing two fan blades rotating in opposite directions. The design of a dual-reverse fan involves complex aerodynamic principles and structural optimization techniques to ensure that the two fan blades work together to achieve higher ventilation efficiency and lower noise levels. A dual-reverse fan consists of an inner fan and an outer fan, both on the same axis and facing opposite directions. The inner fan draws in air, while the outer fan exhausts hot air. One of the advantages of a dual-reverse fan is increased ventilation efficiency. Due to the counter-rotating blades, a cross-flow is created, which covers a wider heat dissipation surface, providing more heat transfer and thus improving overall heat dissipation.

[0005] The shortcomings of the existing technology are: the existing double-reversing blades require additional power to drive the blades to rotate when they are working, which results in high energy consumption. In addition, the ventilation window with double-reversing blades itself does not have a heat-gathering effect. Summary of the Invention

[0006] The purpose of this invention is to provide a Fresnel lens heat-concentrating ventilation window that heats the air through the Fresnel lens and uses the upward movement of the hot airflow to drive the double-reversing blades, so that the heat-concentrating ventilation window can improve the quality of the indoor thermal environment and human comfort without consuming energy.

[0007] Therefore, this invention provides a Fresnel lens heat-concentrating ventilation window, comprising a Fresnel lens, a heat-blocking vacuum-sealed flat glass layer, double-reversing blades, a protective mesh, a support sleeve, and a window frame. The window frame has vertical pivots at its top and bottom center, which are inserted into a cylinder within the window opening wall, allowing the entire window frame to rotate along the vertical pivot. The heat-blocking vacuum-sealed flat glass layer is fixedly installed within the window frame and longitudinally blocks the window frame opening. The upper outer part of the window frame is connected to the Fresnel lens via a rotating hinge member, allowing the Fresnel lens to rotate outwards around the hinge member to adjust the angle of the light-facing surface. The support sleeve is located at the center of the window frame and passes through the heat-blocking vacuum-sealed flat glass layer. The device includes an internal support rod for supporting the Fresnel lens. A first unidirectional rotating shaft and a second unidirectional rotating shaft are rotatably mounted outside the support rod sleeve. The outer blade of the double-reversing blades is mounted on the first unidirectional rotating shaft, and the inner blade of the double-reversing blades is mounted on the second unidirectional rotating shaft. The outer and inner blades are installed at opposite angles to the axis of rotation, so that when airflow passes over them in the same direction, they turn in opposite directions. The outer and inner blades are located on the indoor-facing side of the heat-blocking vacuum flat glass layer. A black heat-absorbing metal wire coil is located at the root of the outer blade, at the focal point of the Fresnel lens. The protective mesh is located on the indoor-facing side of the window frame.

[0008] Furthermore, the outer and inner blades are framed with lightweight, thin metal strips covered with a thin metal film. The outer blades are elongated strips, and the inner blades are short strips. The side of the outer and inner blades facing the Fresnel lens has a black heat-absorbing coating, while the side facing away from the Fresnel lens has a white reflective coating. The Fresnel lens focuses sunlight onto the black heat-absorbing metal wire coil layer, which heats the air. The rising hot air pushes the outer and inner blades, which rotate in opposite directions, drawing the hot air out and blowing it into the room, rapidly increasing the indoor air temperature and improving the indoor thermal environment.

[0009] Furthermore, the protective mesh includes a protective bracket and a central mesh. The central mesh is located at the center of the protective bracket, and its density is greater than that of the protective bracket. The central mesh is installed at the center of the protective bracket, corresponding to the position of the black heat-absorbing metal wire coil layer, to prevent human hands from contacting the black heat-absorbing metal wire coil layer and causing burns. The protective bracket is spaced relatively sparsely to avoid obstructing airflow, while the central mesh is densely arranged to prevent human fingers from penetrating deep into the window and contacting the black heat-absorbing metal wire coil layer.

[0010] Furthermore, the Fresnel lens is provided with a sliding groove and a drainage groove. The sliding groove is vertically arranged inside the Fresnel lens, and one end of the support rod is supported in the sliding groove. The drainage groove is vertically arranged outside the Fresnel lens. Both the sliding groove and the drainage groove extend downward from the center of the Fresnel lens to the lower side of the Fresnel lens, which facilitates the rapid drainage of water accumulated in a series of sawtooth grooves on the surface of the Fresnel lens during rainy or condensing weather.

[0011] To facilitate adjustment and locking of the Fresnel lens position, the support rod includes a rod body, a handle, and an anti-detachment protrusion. The anti-detachment protrusion elastically protrudes from the rod body, and a protruding space is provided on the inner circular hole of the support rod sleeve to accommodate the anti-detachment protrusion. When the anti-detachment protrusion is located within the protruding space, the support rod can move along the support rod sleeve. When the anti-detachment protrusion disengages from the protruding space, the support rod is limited and cannot be freely moved. When the anti-detachment protrusion is located within the protruding space, the support rod can be pushed outwards along the support rod sleeve via the handle. The other end of the support rod pushes the Fresnel lens outwards along the rotating hinge component via a sliding groove. When rotated to a suitable position, the support rod can be rotated 30°, and the anti-detachment protrusion is squeezed by the internal groove of the support rod sleeve, limiting the horizontal support rod. If position adjustment is required, the support rod is rotated another 30°, the anti-detachment protrusion pops out, and the horizontal support rod can be freely moved.

[0012] Furthermore, to reduce weight while achieving good light-gathering effect, the Fresnel lens is made of a highly transparent and lightweight material.

[0013] The black heat-absorbing metal wire coil is set at the root of the outer blade via a first annular connecting bracket; the inner blade is installed outside the support sleeve via a blade connecting rod and a second annular connecting bracket.

[0014] The aforementioned Fresnel lens heat-concentrating ventilation window operates under three conditions: Operating Condition 1. Cold Season Operating Condition: With one side of the Fresnel lens facing outdoors, the Fresnel lens can be kept still or pushed outwards along the rotating hinge component by a support rod, depending on the sunlight conditions. This adjusts the angle of the light-facing side. The Fresnel lens focuses sunlight onto the black heat-absorbing metal wire ring layer, which heats the air. The rising hot air pushes the outer and inner blades to rotate in opposite directions, drawing the hot air out and blowing it into the room, thus increasing the indoor air temperature and improving the indoor thermal environment. Operating Condition 2. Hot Season Operating Condition: Rotate the window frame and Fresnel lens together along the vertical axis by °, so that one side of the Fresnel lens is placed indoors, and the Fresnel lens stops working; the white reflective coating side of the outer and inner blades faces outdoors, reflecting the sunlight entering the room; Operating Condition 3. Ventilation Condition: Rotate the window frame and Fresnel lens together along the vertical axis to create an angle between the window and the wall of the window opening, allowing for indoor and outdoor ventilation by utilizing wind pressure. In the afternoons of cold seasons, face the Fresnel lens towards the sun to focus sunlight, concentrating heat while providing ventilation. In the afternoons of hot seasons, turn the Fresnel lens away from the sun to avoid heat accumulation.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Fresnel lens heat-concentrating ventilation windows can serve as heat-blocking and energy-saving windows. In sunny weather, they heat the air in the window area, forming a heat curtain to further prevent indoor heat loss. Fresnel lens heat-concentrating ventilation windows are inexpensive and easy to install and dismantle.

[0016] 2. Fresnel lens heat-concentrating ventilation windows can also be used as heaters, utilizing solar energy to quickly raise the indoor air temperature and improve the indoor thermal environment.

[0017] 3. This product can switch between different operating conditions (ventilated or not ventilated) according to different seasons and usage needs through structural design, without the need for additional energy consumption, and can regulate the indoor temperature of the building to make it have a comfortable thermal environment. Attached Figure Description

[0018] Figure 1 This is an elevation view of one side of the Fresnel lens for a Fresnel lens-based heat-concentrating ventilation window.

[0019] Figure 2 This is an elevation view of a double-reversal blade.

[0020] Figure 3 Elevation view of one side of the protective mesh of the Fresnel lens heat-concentrating ventilation window.

[0021] Figure 4 Elevation view of one side of the Fresnel lens when the window is rotated 90 degrees (ventilation condition).

[0022] Figure 5 Elevation view of one side of the protective mesh when the window is rotated 90 degrees (ventilation condition).

[0023] Figure 6 This is a cross-sectional view of a Fresnel lens heat-concentrating ventilation window under cold season conditions.

[0024] Figure 7 This is a cross-sectional view of a Fresnel lens heat-concentrating ventilation window under light-harvesting conditions.

[0025] Figure 8 This is a cross-sectional view of a Fresnel lens heat-concentrating ventilation window under hot season conditions.

[0026] Figure 9 This is a diagram of the unidirectional rotating shaft and support system for a Fresnel lens heat-concentrating window.

[0027] Figure 10 This is a structural diagram of the support sleeve and the support rod cross-section.

[0028] Figure 11 The outer blades of the Fresnel lens heat-concentrating window.

[0029] Figure 12 The blades are inside the Fresnel lens heat-concentrating window.

[0030] In the diagram: 1-Fresnel lens, 1a-slide groove, 12-drainage groove, 2-heat-blocking vacuum plate glass layer, 3-double reversing blade, 31-outer blade, 32-inner blade, 33-first annular connecting bracket, 34-black heat-absorbing metal wire ring layer, 35-blade connecting rod, 36-second annular connecting bracket, 4-protective mesh, 41-protective bracket, 42-central mesh, 5-support rod sleeve, 6-window frame, 61-vertical pivot, 62-pivot sleeve, 63-rotational hinge component, 7-window opening wall, 8-support rod, 81-rod body, 82-handle, 83-anti-detachment protrusion, 9-support rod sleeve, 10-first one-way pivot, 11-second one-way pivot. Detailed Implementation

[0031] like Figure 1-12 The image shows a Fresnel lens heat-concentrating ventilation window. Its structure mainly includes a Fresnel lens 1, a heat-blocking vacuum-sealed flat glass layer 2, double-reversing blades 3, a protective mesh 4, a support sleeve 9, and a window frame 6. The window frame 6 has vertical pivots 61 at the top and bottom center, which are inserted into the shaft sleeve 62 of the window opening wall 7, allowing the entire window frame to rotate along the vertical pivots 61. The heat-blocking vacuum-sealed flat glass layer 2... The window frame 6 is fixedly installed inside the window frame 6 and longitudinally blocks the window frame opening. The upper outer part of the window frame 6 is connected to the Fresnel lens 1 via a rotating hinge member 63, allowing the Fresnel lens 1 to rotate outwards around the hinge member 63 to adjust the angle of the light-facing surface. The support sleeve 9 is located at the center of the window frame 6 and passes through the heat-blocking vacuum flat glass layer 2. The support sleeve 9 contains a support rod 8 for supporting the Fresnel lens 1. A first one-way rotating shaft 10 and a second one-way rotating shaft 11 are rotatably mounted on the outside of the support sleeve 9. The outer blade of the double reversing blade 3 is installed on the first one-way rotating shaft 10. The inner blade 32 of the double reversing blades 3 is installed on the second unidirectional rotating shaft 11. The outer blade 31 and the inner blade 32 are installed with opposite tilt angles to the rotation axis, so that when the airflow in the same direction blows over the outer blade 31 and the inner blade 32, they turn in opposite directions. The outer blade 31 and the inner blade 32 are located on the indoor side of the heat-blocking vacuum flat glass layer 2. A black heat-absorbing metal wire ring layer 34 is provided at the root of the outer blade 31. The black heat-absorbing metal wire ring layer 34 is located at the focal point of the Fresnel lens 1. The protective mesh 4 is set on the indoor side of the window frame 6.

[0032] The outer blade 31 and inner blade 32 are framed by lightweight thin metal strips, with a thin metal film covering the frame to form the blades. The outer blade 31 is long and narrow, while the inner blade 32 is short and narrow. The side of the outer blade 31 and inner blade 32 facing the Fresnel lens 1 has a black heat-absorbing coating, while the side facing away from the Fresnel lens 1 has a white reflective coating. The Fresnel lens 1 focuses sunlight onto the black heat-absorbing metal wire ring layer 34, which heats the air. The rising hot air pushes the outer blade 31 and inner blade 32, which rotate in opposite directions, drawing the hot air out and blowing it into the room, rapidly raising the indoor air temperature and improving the indoor thermal environment.

[0033] The protective mesh 4 includes a protective bracket 41 and a central mesh 42. The central mesh 42 is located at the center of the protective bracket 41, and its density is greater than that of the protective bracket 41. The central mesh 42 is installed at the center of the protective bracket 41, corresponding to the position of the black heat-absorbing metal wire coil layer 34, to prevent hands from contacting the black heat-absorbing metal wire coil layer 34 and causing burns. The protective bracket 41 has a sparser arrangement to allow for air circulation, while the central mesh 42 has a denser arrangement to prevent fingers from penetrating deep into the window and contacting the black heat-absorbing metal wire coil layer 34.

[0034] The Fresnel lens 1 is provided with a sliding groove 1a and a drainage groove 12. The sliding groove 1a is vertically set inside the Fresnel lens 1, and one end of the support rod 8 is supported in the sliding groove 1a. The drainage groove 12 is vertically set outside the Fresnel lens 1. Both the sliding groove 1a and the drainage groove 12 extend downward from the center of the Fresnel lens 1 to the lower side of the Fresnel lens 1, so as to facilitate the rapid drainage of water accumulated in a series of sawtooth grooves on the surface of the Fresnel lens 1 during rainy or condensing weather.

[0035] To facilitate adjustment and locking of the Fresnel lens 1, the support rod 8 includes a rod body 81, a handle 82, and an anti-detachment protrusion 83. The anti-detachment protrusion 83 elastically protrudes from the rod body 81, and a protruding space is provided on the inner circular hole cross-section of the support rod sleeve 9 to accommodate the anti-detachment protrusion 83. When the anti-detachment protrusion 83 is located within the protruding space, the support rod 8 can move along the support rod sleeve 9. When the anti-detachment protrusion 83 disengages from the protruding space, the support rod 8 is limited and cannot be freely moved. When the anti-detachment protrusion 83 is located within the protruding space, the support rod 8 can be pushed outdoors along the support rod sleeve 9 via the handle 82. The other end of the support rod 8 pushes the Fresnel lens 1 outdoors along the rotating hinge member 63 via the sliding groove 1a. When rotated to a suitable position, the support rod 8 can be rotated 90°, and the anti-detachment protrusion 83 is squeezed by the internal hole groove of the support rod sleeve 9, limiting the support rod 8. If you need to adjust the position, rotate the support rod 8 another 90°, the anti-detachment protrusion 83 pops out, and the support rod 8 can be pulled freely.

[0036] Furthermore, to reduce weight while achieving good light-gathering effect, the Fresnel lens 1 is made of a highly transparent and lightweight material.

[0037] The black heat-absorbing metal wire coil layer 34 is set at the root of the outer blade 31 via the first annular connecting bracket 33; the inner blade 32 is connected to the second annular connecting bracket 36 via the blade connecting rod 35.

[0038] The aforementioned Fresnel lens heat-concentrating ventilation window operates under the following three conditions: Operating Condition 1. Cold Season Operating Condition: With one side of the Fresnel lens 1 facing outdoors, the Fresnel lens 1 can remain stationary or be pushed by the support rod 8 to rotate outwards along the rotating hinge member 63, adjusting the angle of the light-facing side. The Fresnel lens 1 focuses sunlight onto the black heat-absorbing metal wire ring layer 34, which heats the air. The rising hot air pushes the outer blade 31 and the inner blade 32 to rotate in opposite directions, drawing the hot air out and blowing it into the room, increasing the indoor air temperature and improving the indoor thermal environment. Operating Condition 2. Hot Season Operating Condition: Rotate the window frame 6 and Fresnel lens 1 together 180° along the vertical axis 61 so that one side of Fresnel lens 1 is placed indoors and Fresnel lens 1 stops working; the white reflective coating side of the outer blade 31 and inner blade 32 faces the outside and reflects the sunlight entering the room. Operating Condition 3. Ventilation Condition: Rotating the window frame 6 along with the Fresnel lens 1 along the vertical axis 61 creates an angle between the window and the wall 7 of the window opening, allowing for indoor and outdoor ventilation using wind pressure. For example, in the afternoon during the cold season, rotating the Fresnel lens 1 45° towards the sun allows for both heat accumulation and ventilation; in the afternoon during the hot season, rotating the Fresnel lens 1 135° away from the sun avoids heat accumulation.

[0039] In summary, this device, through its window design, focuses sunlight to heat the outer ring 34 of the heat-absorbing metal wire, thereby heating the air. The rising hot airflow then drives the double-reversing blades 3, whose inner side has a dark heat-absorbing coating, to rotate, drawing the hot air out and blowing it into the indoor space. The Fresnel lens 1 can also be individually raised to the desired angle, maximizing sunlight focus. Furthermore, the window frame 6, along with the Fresnel lens 1, can rotate 180° along its central longitudinal axis. In summer, the entire window can be flipped indoors, with the other side of the double-reversing blades white and facing outwards, providing some sunlight reflection and shading. Alternatively, it can be rotated to the desired angle for direct ventilation using wind pressure in summer. This heat-concentrating ventilation window improves indoor thermal environment quality and human comfort without requiring energy consumption.

[0040] This invention is not limited to the above embodiments. Based on the technical solutions disclosed in this invention, those skilled in the art can make some substitutions and modifications to some of the technical features without creative effort, and all such substitutions and modifications are within the protection scope of this invention.

Claims

1. A Fresnel lens heat-concentrating ventilation window, characterized in that: The window frame (6) includes a Fresnel lens (1), a heat-blocking vacuum flat glass layer (2), double-reversing blades (3), a protective mesh (4), a support sleeve (9), and a window frame (6). The window frame (6) has a vertical pivot (61) at the top and bottom center. The vertical pivot (61) is inserted into the shaft sleeve (62) of the window opening wall (7), allowing the entire window frame to rotate along the vertical pivot (61). The heat-blocking vacuum flat glass layer (2) is fixedly installed inside the window frame (6) and longitudinally blocks the window frame opening. The upper outer part of the window frame (6) is connected to the Fresnel lens (1) via a rotating hinge member (63), allowing the Fresnel lens (1) to rotate outwards around the hinge member (63) to adjust the angle of the light-facing surface. The support sleeve (9) is located at the center of the window frame (6) and passes through the heat-blocking vacuum flat glass layer (2). The support sleeve (9) contains a support rod (8) for supporting the Fresnel lens (1). 9) A first unidirectional rotating shaft (10) and a second unidirectional rotating shaft (11) are rotatably mounted on the outside. The first unidirectional rotating shaft (10) is close to the Fresnel lens (1). The outer blade (31) of the double reversing blade (3) is mounted on the first unidirectional rotating shaft (10), and the inner blade (32) of the double reversing blade (3) is mounted on the second unidirectional rotating shaft (11). The outer blade (31) and the inner blade (32) are installed with opposite angles to the axis of rotation, so that when the airflow blows through the outer blade (31) and the inner blade (32), they turn in opposite directions. The outer blade (31) and the inner blade (32) are located on the indoor side of the heat-blocking vacuum flat glass layer (2). A black heat-absorbing metal wire coil layer (34) is provided at the root of the outer blade (31). The black heat-absorbing metal wire coil layer (34) is located at the focal point of the Fresnel lens (1). The protective mesh (4) is set on the indoor side of the window frame (6).

2. The Fresnel lens heat-concentrating ventilation window according to claim 1, characterized in that: The outer blade (31) and inner blade (32) are framed by a lightweight thin metal strip, and the frame is covered with a metal film as the blade. The outer blade (31) is long and strip-shaped, and the inner blade (32) is short and strip-shaped. The side of the outer blade (31) and inner blade (32) facing the Fresnel lens (1) is coated with a black heat-absorbing film, and the other side facing away from the Fresnel lens (1) is coated with a white reflective film.

3. A Fresnel lens heat-concentrating ventilation window according to claim 1, characterized in that: The protective mesh (4) includes a protective support (41) and a central mesh (42). The central mesh (42) is located at the center of the protective support (41), and the arrangement density of the central mesh (42) is greater than that of the protective support (41).

4. A Fresnel lens heat-concentrating ventilation window according to any one of claims 1-3, characterized in that: The Fresnel lens (1) is provided with a sliding groove (1a) and a drainage groove (12). The sliding groove (1a) is vertically arranged inside the Fresnel lens (1), and one end of the support rod (8) is supported inside the sliding groove (1a). The drainage groove (12) is vertically arranged outside the Fresnel lens (1). Both the sliding groove (1a) and the drainage groove (12) extend downward from the center of the Fresnel lens (1) to the lower side of the Fresnel lens (1), so as to facilitate the rapid drainage of water accumulated in a series of sawtooth grooves on the surface of the Fresnel lens (1) during rainy days and condensation weather.

5. A Fresnel lens heat-concentrating ventilation window according to claim 4, characterized in that: The support rod (8) includes a rod body (81), a handle (82), and an anti-detachment protrusion (83). The anti-detachment protrusion (83) elastically protrudes out of the rod body (81). The inner circular hole of the support rod sleeve (9) is provided with a protruding space to accommodate the anti-detachment protrusion (83). When the anti-detachment protrusion (83) is located in the protruding space, the support rod (8) can move along the support rod sleeve (9). When the anti-detachment protrusion (83) is removed from the protruding space, the support rod (8) is limited and cannot be freely pulled out.

6. A Fresnel lens heat-concentrating ventilation window according to any one of claims 1-3, characterized in that: The Fresnel lens (1) is made of a highly transparent and lightweight material.

7. A Fresnel lens heat-concentrating ventilation window according to any one of claims 1-3, characterized in that: The black heat-absorbing metal wire coil layer (34) is set at the root of the outer blade (31) via the first annular connecting bracket (33); the inner blade (32) is installed on the second annular connecting bracket via the blade connecting rod (35).

8. A method of using a Fresnel lens heat-concentrating ventilation window according to any one of claims 1-3, characterized in that, Includes one of the following three operating conditions: Operating Condition 1. Cold Season Operating Condition: One side of the Fresnel lens (1) of the ventilation window is set to the outside. The Fresnel lens (1) is kept still or pushed by the support rod (8) according to the sunlight conditions. It is flipped to the outside along the rotating hinge member (63) to adjust the angle of the light-facing side. The Fresnel lens (1) focuses the sunlight onto the black heat-absorbing metal wire ring layer (34). The black heat-absorbing metal wire ring layer (34) heats the air. The hot air rises and pushes the outer blade (31) and the inner blade (32) to rotate in opposite directions to draw out the hot air and blow it into the room, thereby increasing the indoor air temperature and improving the indoor thermal environment. Operating Condition 2. Hot Season Operating Condition: Rotate the window frame (6) and Fresnel lens (1) together along the vertical axis (61) by 180° so that the Fresnel lens (1) side of the ventilation window is placed indoors and the Fresnel lens (1) stops working; the white reflective coating side of the outer blade (31) and inner blade (32) faces the outside and reflects the sunlight entering the room. Operating Condition 3. Ventilation Condition: Rotate the window frame (6) and Fresnel lens (1) together along the vertical axis (61) to form an angle between the window and the wall of the window opening (7), so that indoor and outdoor ventilation can be carried out and ventilation can be carried out by wind pressure. In the afternoon of the cold season, the Fresnel lens (1) is turned towards the sun and the sunlight is focused by the Fresnel lens (1) to gather heat and ventilate at the same time. In the afternoon of the hot season, the Fresnel lens (1) is turned away from the sun to avoid the Fresnel lens (1) gathering heat.

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