Ventilation device for assembled kitchen
By installing screens and airflow guides on kitchen windows, the direction of airflow is changed, solving the problems of difficult construction and the dispersion of fumes and steam, and achieving low-cost and efficient kitchen ventilation and air replenishment.
Patent Information
- Application Number
- CN202610094187.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-23
- Publication Date
- 2026-04-10
AI Technical Summary
Existing kitchen ventilation and air replenishment methods are difficult to construct, costly, and the fumes and steam can easily drift into other rooms, affecting the suction effect and the living environment.
Design a prefabricated kitchen ventilation device. By installing screens and airflow guiding components on the windows, and using a fan-shaped frame, a flexible self-rolling shaft, and a flexible membrane to form a vertical airflow channel, the airflow direction is changed, avoiding direct air impact on fumes and steam.
It improves the ventilation and air replenishment effect in the kitchen, prevents oil fumes and steam from spreading, reduces construction costs, and meets the needs for low-cost and high-efficiency ventilation.
Smart Images
Figure CN121828826A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of kitchen ventilation and air replenishment technology, specifically relating to a prefabricated kitchen ventilation device. Background Technology
[0002] As the core area for food preparation, the kitchen generates a large amount of fumes, steam, and heat during cooking methods such as steaming, boiling, frying, stir-frying, and deep-frying, making the stove area suffocating and hot. Therefore, exhaust systems, such as exhaust fans and range hoods, are installed during kitchen renovations to draw fumes, steam, and heat, along with the surrounding air, into the flue or outdoors, thus improving the comfort of the cooking environment. However, as the exhaust system continuously draws air out of the kitchen, ventilation is necessary to ensure air circulation. Otherwise, a negative pressure environment in the kitchen can negatively impact the exhaust system's effectiveness.
[0003] Currently, kitchen ventilation and air supply methods include: make-up air systems, kitchen doors, and windows. Make-up air systems connect the kitchen to the outside via ducts, using a fan to actively draw outdoor air into the kitchen. Since the fan and ducts are located in the kitchen ceiling, they need to be installed during kitchen renovation, and holes need to be drilled in the walls to connect the ducts to the outside. Installing make-up air systems after kitchen renovation is often difficult due to the ceiling and cabinets, requiring modifications to the ceiling and cabinets, resulting in higher installation costs. Therefore, this method is generally not used for ventilation and air supply after kitchen renovation is complete. Ventilation and air supply through opening kitchen doors or windows utilizes pressure differences to achieve natural air circulation, thereby bringing outdoor or other room air into the kitchen. Therefore, opening kitchen doors or windows is the most common and lowest-cost method for ventilation and air supply.
[0004] However, when the kitchen door is opened for ventilation, cooking fumes and steam can easily drift into other rooms, negatively impacting their living conditions. Currently, kitchens are generally ventilated by keeping the kitchen door closed and opening only the window to prevent fumes and steam from spreading to other rooms. However, when the window is opened for ventilation, and the fumes and steam are drawn upwards by the range hood, some kitchens experience the upward-moving fumes and steam shifting to one side or dispersing, making it difficult for the range hood to quickly remove them. Research has found that this situation occurs because the kitchen window is located to the side of the range hood. The lateral airflow entering the kitchen through the window impacts the upward-moving fumes and steam, causing them to disperse around the stove area. Only by reducing the window's opening can this situation be improved.
[0005] However, reducing the opening of the window will inevitably reduce the airflow and the effect of ventilation in the kitchen. This can easily lead to negative pressure inside the kitchen, affecting the suction effect. Especially when the range hood is turned on at high suction power, insufficient ventilation will further increase the negative pressure in the kitchen, making it difficult for the range hood to extract the fumes and steam. Summary of the Invention
[0006] In view of this, the present invention provides a prefabricated kitchen ventilation device to overcome the shortcomings of the prior art. The present invention can change the direction of air flow after entering the kitchen through the window, avoid the air impacting the upward-moving fumes and steam, and improve the ventilation and air replenishment effect of the kitchen.
[0007] The technical solution of this invention is: a prefabricated kitchen ventilation device, configured and installed on a kitchen window. The device includes a window frame and a screen installed inside the window frame. The window frame is vertically fixed to the kitchen window. It also includes horizontally opened mounting slots on the upper and lower crossbeams of the window frame. The width of the mounting slots is greater than the width of the screen. The airflow guiding component includes fan-shaped frames, an elastic self-winding shaft, a flexible membrane wound around the elastic self-winding shaft, and a driving mechanism. The fan-shaped frames are horizontally arranged in the mounting slots. The side of each fan-shaped frame near its apex is hinged to the middle of the mounting slot, and the fan-shaped frame away from its apex... One side of the window is located outdoors. The flexible self-rolling shaft is vertically mounted on a post on one side of the window frame. Both ends of the flexible self-rolling shaft are rotatably connected to the post. The flexible membrane is connected to the side of the two sector frames near the flexible self-rolling shaft. The drive mechanism is located on the window frame and is connected to the hinge shafts of the two sector frames respectively. It is used to drive the sector frames to rotate. When the sector frames rotate from one side of the flexible self-rolling shaft into the room, the flexible self-rolling shaft releases the flexible membrane until it covers the screen. The sector frames support the flexible membrane outside the screen to form a vertical airflow channel. The vertical airflow channel changes the direction of airflow after entering the kitchen from the window.
[0008] Preferably, a first magnetic strip is fixed on the flexible membrane along its length and located in the middle of the flexible membrane, and a second magnetic strip is fixed horizontally in the middle of the mesh. The first magnetic strip and the second magnetic strip have opposite magnetic properties and attract each other, so that the distance between the flexible membrane and the mesh gradually increases from the middle of the vertical flow channel to the upper and lower ends.
[0009] Preferably, flexible membrane driving blocks are provided in the mounting slots and are located on the side of the mounting slots closer to the interior. The flexible membrane driving blocks are slidably connected to the mounting slots along the width direction. The flexible membrane driving blocks are fixedly connected to the flexible membranes. A first inclined surface is provided on the side of the flexible membrane driving block close to the elastic self-rolling shaft. When the sector frame rotates from the side of the elastic self-rolling shaft toward the interior, the first inclined surface abuts against a straight segment of the sector frame to push the flexible membrane driving block to move away from the elastic self-rolling shaft, so that the elastic self-rolling shaft releases the flexible membrane.
[0010] Preferably, the flexible membrane driving block is provided with a second inclined surface, the second inclined surface and the first inclined surface are located on the same side of the flexible membrane driving block, and the angle between the first inclined surface and the second inclined surface is an obtuse angle.
[0011] Preferably, the inner side of the fan-shaped frame is provided with multiple ribs at equal intervals along its radial direction, the two ends of the ribs are connected to the fan-shaped frame, and the thickness of the ribs gradually decreases from the middle to the upper and lower sides.
[0012] Preferably, each end of the rib is coaxially fixed with a rotating shaft, which is rotatably connected to the sector frame around its circumference.
[0013] Preferably, the driving mechanism includes: a lead screw and a second slider. The lead screw passes through the second slider and is threadedly connected to it. The internal structure of the uprights on the side of the window frame away from the elastic roller and the horizontal beams on the upper and lower sides are hollow. The lead screw is vertically arranged in the hollow uprights and rotatably connected to them. The two ends of the lead screw are respectively connected to the hinge shaft of the sector frame through a rope transmission or gear transmission unit inside the horizontal beam. A second sliding groove is vertically opened on the side of the hollow uprights near the interior. The second slider extends into the second sliding groove and is slidably connected to it.
[0014] Preferably, it further includes: a handle, a locking rod, a countersunk hole horizontally opened on the side of the second slider closer to the interior, one end of the handle is inserted into the countersunk hole and slidably connected to it along the depth direction of the countersunk hole, two locking rods are horizontally fixed on both sides of the handle and are symmetrical to each other, and U-shaped limiting grooves are respectively opened on the inner walls of both sides of the second slide groove, the bottom of the U-shaped limiting groove is parallel to the second slide groove, the end of the locking rod away from the handle extends into the U-shaped limiting groove, and the locking rod slides along the U-shaped limiting groove.
[0015] Preferably, a spring is provided in the countersunk hole, and the spring abuts against the bottom of the countersunk hole and the handle respectively, so as to drive the handle to move away from the second slider.
[0016] Compared with existing technologies, the present invention provides a prefabricated kitchen ventilation device. Through the cooperation of a window frame, a screen, a fan-shaped frame of airflow guiding components, an elastic self-rolling shaft, a flexible membrane, and a drive mechanism, the window frame is installed on the kitchen window. Outdoor air enters the kitchen through the screen. When the kitchen's exhaust system draws upwards the fumes and steam from the stove area, the drive mechanism rotates the fan-shaped frame from one side of the elastic self-rolling shaft towards the interior. As the fan-shaped frame rotates inwards, it pulls the flexible membrane to unfold until it covers the screen. The fan-shaped frame supports the unfolded flexible membrane on the outside of the screen, forming a vertical airflow guiding channel. This changes the direction of airflow after entering the kitchen through the window, allowing air to flow from both the top and bottom sides towards the stove area for replenishment. This avoids the air directly impacting the upward-moving fumes and steam, improving the ventilation and replenishment effect in the kitchen. Furthermore, this device can be directly installed on the kitchen window, meeting the kitchen's need for convenient installation and construction for ventilation and replenishment. Attached Figure Description
[0017] Figure 1 This is a front view of the ventilation and air exchange device of the present invention; Figure 2 This is a top view of the ventilation and air exchange device of the present invention; Figure 3 This is the present invention. Figure 1 AA section view in the middle; Figure 4 This is the present invention. Figure 1 BB section view in the middle; Figure 5 This is the present invention. Figure 2 CC section view in the middle; Figure 6 This is the present invention. Figure 2 DD section view in the middle; Figure 7 This is a front view of the window frame in this invention; Figure 8 This is the present invention. Figure 7 EE section view; Figure 9 This is a top view of the sector frame in this invention; Figure 10 This is a schematic diagram of the end of the rib in this invention; Figure 11 This is a schematic diagram of the ventilation and air exchange device of the present invention in use. Detailed Implementation
[0018] This invention provides a prefabricated ventilation device for kitchens, which is described below in conjunction with... Figures 1 to 11 The present invention is illustrated by the structural diagram shown below.
[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0020] Reference Figure 1 , Figure 2 , Figure 1 This is a front view of the ventilation and air exchange device in this embodiment. Figure 2This is a top view of the ventilation device of this embodiment. A prefabricated kitchen ventilation device is installed on a kitchen window. The device includes a window frame 1 and a screen 2 disposed inside the window frame 1. The window frame 1 is vertically fixed to the kitchen window. It also includes horizontally opened mounting slots 101 on the upper and lower crossbeams 11 of the window frame 1. The width of the mounting slots 101 is greater than the width of the screen 2. The airflow guiding component includes fan-shaped frames 3, an elastic self-winding shaft 4, a flexible membrane 5 wound around the elastic self-winding shaft 4, and a driving mechanism. The fan-shaped frames 3 are horizontally disposed in the mounting slots 101. The side of the fan-shaped frame 3 near its apex is hinged to the middle of the mounting slot 101. The side of frame 3 furthest from its top corner is located outdoors. The elastic self-rolling shaft 4 is vertically mounted on the column 12 on one side of window frame 1. Both ends of the elastic self-rolling shaft 4 are rotatably connected to the column 12. The flexible membrane 5 is connected to the side of the two sector frames 3 near the elastic self-rolling shaft 4. The drive mechanism is mounted on window frame 1 and is connected to the hinge shafts of the two sector frames 3 respectively, for driving the sector frames 3 to rotate. When the sector frames 3 rotate from one side of the elastic self-rolling shaft 4 into the room, the elastic self-rolling shaft 4 releases the flexible membrane 5 until it covers the screen 2. The sector frames 3 support the flexible membrane 5 on the outside of the screen 2 to form a vertical airflow channel, which changes the direction of airflow after entering the kitchen from the window.
[0021] In this embodiment, the prefabricated kitchen ventilation device is designed based on the existing window screen. The window screen includes a window frame 1 and a mesh screen 2. The window frame 1 is directly installed on the kitchen window. Outdoor air enters the room through the mesh screen 2 on the inner side of the window frame 1. The mesh screen 2 filters large dust particles in the air. This device can be installed when the kitchen window is located to the side of the range hood. During cooking, the drive mechanism drives the fan-shaped frame 3 in the mounting slot 101 to rotate (e.g., rotate 180°) from the side near the elastic self-rolling shaft 4 into the room. Figure 11 , Figure 11 This is a schematic diagram of the ventilation and air exchange device in use according to this embodiment. The side of the sector-shaped frame 3 closest to its curved edge is positioned indoors. Simultaneously, as the sector-shaped frame 3 rotates, it pulls on the flexible membrane 5, causing the elastic roll 4 to continuously release the flexible membrane 5, thus unfolding it. Figure 11As shown, when the end of the flexible membrane 5 moves to the column 12 away from the elastic self-rolling spool 4, the width of the mounting slot 101 is greater than the width of the mesh 2, and the two mounting slots 101 are located on the upper and lower sides of the mesh 2, allowing the unfolded flexible membrane 5 to cover the mesh 2. The two fan-shaped frames 3 support the unfolded flexible membrane 5 to form a vertical airflow channel. After passing through the mesh, the outdoor air changes its flow direction using the vertical airflow channel, causing the air to flow in both upward and downward directions. Due to the lower pressure in the stove area, the upward and downward flowing air gradually approaches the stove area, allowing the air entering the kitchen to flow from the upper and lower sides to the stove area for replenishment. This avoids the air entering the kitchen from the window flowing directly to the stove area, improving the ventilation and replenishment effect in the kitchen. Furthermore, this device is prefabricated and installed on the kitchen window, requiring no modification to other facilities, thus meeting the existing demand for low-cost and high-efficiency kitchen ventilation and replenishment.
[0022] Specifically, such as Figure 1 As shown in this embodiment, the outer edge of the sector frame needs to abut against the inner wall of the mounting slot 101 (horizontal and vertical directions) so that the sector frame 3 can prevent outdoor air from passing through the mounting slot 101 and entering the room, regardless of whether it is located outdoors or indoors.
[0023] Specifically, in this embodiment, the window frame 1 and the fan-shaped frame 3 can be made of aluminum profiles, and the mounting groove 101 on the window frame 1 is directly cut during the processing of the crossbeam 11.
[0024] Specifically, during installation, the flexible self-rolling shaft 4 can be vertically fixed to the storage box 42 on any of the uprights 12 of the window frame 1 near the outside. The flexible self-rolling shaft 4 is installed in the storage box 42. The upright 12 has a vertical connecting groove that only connects to the inside of the storage box 42 to prevent outdoor air from entering the room through the connecting groove. The flexible film 5 on the flexible self-rolling shaft 4 passes through the connecting groove and enters the room, where it connects to the fan-shaped frame 3. A guide roller can be installed in the connecting groove to improve the smoothness of the flexible film 5 unfolding. The flexible film 5 should be made of a transparent material to ensure the light transmittance of the window. For example, the material is transparent polyimide with a light transmittance of ≥83% - 88%, good flexibility, and high temperature resistance.
[0025] However, if the window frame 1 is hinged to the window in the form of a casement window, so that the window frame 1 can be opened and closed, then the elastic self-rolling shaft 4 and the storage box 42 are installed on the post 12 of the window frame 1 near its hinge axis.
[0026] Reference Figure 5 , Figure 5This is a CC cross-sectional view of the ventilation and air exchange device in this embodiment. As a further optimization, in this embodiment, a first magnetic strip 6 is fixed along the length of the flexible membrane 5 and is located in the middle of the flexible membrane 5. A second magnetic strip 7 is horizontally fixed in the middle of the mesh 2. The first magnetic strip 6 and the second magnetic strip 7 have opposite magnetic properties. The first magnetic strip 6 and the second magnetic strip 7 attract each other, so that the distance between the flexible membrane 5 and the mesh 2 gradually increases from the middle of the vertical flow channel to the upper and lower ends.
[0027] In this embodiment, based on the previous embodiment, when the flexible membrane 5 is unfolded, it forms a vertical airflow channel with the fan-shaped frame 3, further improving the guiding effect of the vertical airflow channel. By utilizing the mutual attraction between the first magnetic strip 6 on the flexible membrane 5 and the second magnetic strip 7 on the mesh 2, the distance between the flexible membrane 5 and the mesh 2 gradually increases from the middle of the vertical airflow channel to the upper and lower ends. This allows the flexible membrane 5 to be divided into upper and lower parts with the middle of the vertical airflow channel as the boundary, and the upper and lower parts of the flexible membrane 5 each form a semi-trumpet shape. After the air passes through the mesh 2, it can not only avoid direct vertical impact on the flexible membrane 5 (with the mesh 2 as the vertical surface, the unfolded flexible membrane 5 is an inclined arc surface), improving the stability of the flexible membrane 5 and thus ensuring the stability of air guidance, but also avoid excessive loss of air kinetic energy, so that the airflow velocity is sufficient to ensure the ventilation and air replenishment effect.
[0028] In addition, the vertical airflow channel is semi-trumpet shaped on both the top and bottom, which allows the air to spread over a larger area after flowing out of the vertical airflow channel. This further avoids the air directly impacting the upward-moving fumes and steam in the stove area, and further improves the ventilation and air replenishment effect in the kitchen.
[0029] Specifically, since the flexible membrane 5 needs to be rolled up when the device is not in use, the material of the first magnetic strip 6 needs to be flexible, such as rubber magnet or flexible self-supporting magnetic film. The rubber magnet is made of ferrite magnetic powder mixed with synthetic rubber / plastic. The second magnetic strip 7 is long and narrow to avoid excessive impact on the effective air permeability area of the mesh.
[0030] Reference Figure 3 , Figure 3This is a cross-sectional view of the ventilation and air exchange device in this embodiment. As a further optimization, flexible membrane driving blocks 8 are respectively provided in the mounting slot 101 in this embodiment, and are located on the side of the mounting slot 101 closer to the room. The flexible membrane driving blocks 8 are slidably connected to the mounting slot 101 along its width direction. The flexible membrane driving blocks 8 are respectively fixedly connected to the flexible membrane 5. A first inclined surface 81 is provided on the side of the flexible membrane driving block 8 close to the elastic self-rolling shaft 4. When the sector frame 3 rotates from one side of the elastic self-rolling shaft 4 into the room, the first inclined surface 81 abuts against a straight segment of the sector frame 3 to push the flexible membrane driving block 8 to move away from the elastic self-rolling shaft 4, so that the elastic self-rolling shaft 4 releases the flexible membrane 5.
[0031] In this embodiment, when the sector frame 3 rotates, it is driven to move by the first inclined surface 81 of the flexible membrane drive block 8, which drives the flexible membrane 5 to unfold along the width direction of the mounting slot 101, thereby improving the stability of the unfolding of the flexible membrane 5. This allows the flexible membrane 5 and the sector frame 3 to cooperate to form a stable vertical airflow channel, thereby improving the stability of the air guiding effect.
[0032] In addition, by using the flexible membrane drive block 8 as an intermediate component to connect with the flexible membrane 5, it is possible to avoid using a connecting strap to fix the flexible membrane 5 and the sector frame 3, thus preventing the flexible membrane 5 from slipping during unfolding and increasing the stability of the flexible membrane 5 during unfolding and rewinding.
[0033] In this embodiment, positioning grooves 51 can be opened on the upper and lower sides of the flexible membrane 5 along its length direction, and the side of the fan-shaped frame 3 near its arc edge can be inserted into the positioning groove 51 to further improve the stability of the flexible membrane 5 when unfolded.
[0034] Specifically, such as Figure 3 As shown, first sliding grooves 102 are respectively provided on the upper and lower inner walls of the mounting through groove 101. The first sliding grooves 102 are located on the side of the mounting through groove 101 closer to the room. The width direction of the first sliding grooves 102 is parallel to that of the mounting through groove 101. The upper and lower sides of the flexible membrane drive block 8 are fixed with first sliders. The first sliders are embedded in the first sliding grooves 102 and slide with them.
[0035] As a further optimization, in this embodiment, a second inclined surface 82 is provided on the flexible membrane driving block 8. The second inclined surface 82 and the first inclined surface 81 are located on the same side of the flexible membrane driving block 8, and the included angle between the first inclined surface 81 and the second inclined surface 82 is an obtuse angle.
[0036] In this embodiment, the second inclined surface 82 on the flexible membrane drive block 8 enables the straight segment of the fan-shaped frame 3 to cooperate with the second inclined surface 82 to press and fix the flexible membrane drive block 8 when the fan-shaped frame 3 drives the flexible membrane drive block 8 to the end of the mounting groove 101 away from the elastic self-rolling shaft 4. This improves the stability of the flexible membrane 5 after it is unfolded and the stability of the deformation attracted by the first magnetic strip 6 and the second magnetic strip 7, thereby further improving the stability of the vertical flow channel and ensuring the effect of ventilation and air replenishment in the kitchen.
[0037] Reference Figure 9 , Figure 9 This is a top view of the sector frame in this embodiment. As a further optimization, in this embodiment, the inner side of the sector frame 3 is provided with multiple ribs 9 at equal intervals along its radial direction. The two ends of the ribs 9 are connected to the sector frame 3, and the thickness of the ribs 9 gradually decreases from the middle to the upper and lower sides.
[0038] In this embodiment, multiple ribs 9 support the fan-shaped frame 3 and the unfolded flexible membrane 5, which not only improves the stability of the vertical airflow channel, but also allows the ribs 9 to cut the airflow flowing up and down, so that the air replenished into the kitchen can quickly blend into the original air, and make the air around the stove area move towards it evenly, avoiding impact on the upward-moving fumes and steam in the stove area, and further improving the ventilation and air replenishment effect of the kitchen.
[0039] Reference Figure 10 , Figure 10 This is a schematic diagram of the end of the rib in this embodiment. As a further optimization, in this embodiment, the two ends of the rib 9 are respectively coaxially fixed with a rotating shaft 91, and the rotating shaft 91 is rotatably connected to the sector frame 3 around its circumference.
[0040] In this embodiment, the rib 9 is rotatably connected to the fan-shaped frame 3 via the pivots 91 at both ends of the rib 9. The direction of the rib 9 can be adjusted according to whether the window is on the left or right side of the range hood. When the window is on the left side of the range hood, the rib 9 is adjusted to tilt to the left, and when the window is on the right side of the range hood, the rib 9 is adjusted to tilt to the right. This further reduces the impact of the air entering the kitchen from the window on the upward-moving fumes and steam, allowing the incoming air to blend into the air around the stove area, further improving the ventilation and air replenishment effect in the kitchen.
[0041] Reference Figure 4 , Figure 6 as well as Figure 7 , Figure 4 This is a BB cross-sectional view of the ventilation and air exchange device in this embodiment. Figure 6 This is a DD cross-sectional view of the ventilation and air exchange device in this embodiment. Figure 7This is a front view of the window frame in this embodiment. This embodiment provides a specific structure of the driving mechanism, which includes a lead screw 13 and a second slider 14. The lead screw 13 passes through the second slider 14 and is threadedly connected to it. The interior of the upright 12 on the side of the window frame 1 away from the elastic roller 4 and the horizontal beams 11 on the upper and lower sides are hollow. The lead screw 13 is vertically arranged in the hollow upright 12 and is rotatably connected to it. The two ends of the lead screw 13 are respectively connected to the hinge shaft of the sector frame 3 through a rope transmission or gear transmission unit inside the horizontal beam 11. The hollow upright 12 has a second sliding groove 122 vertically opened on the side closer to the interior. The second slider 14 extends into the second sliding groove 122 and is slidably connected to it.
[0042] In this embodiment, the drive mechanism is connected to the lead screw 13 and the second slider 14 via rope transmission or gear transmission. The lead screw 13 and the second slider 14 are installed in the column 12 on the side of the window frame 1 away from the elastic self-rolling shaft 4. By moving the second slider 14 along the lead screw 13 to make it rotate, the hinge shaft of the sector frame 3 is driven to rotate by the rope transmission or gear transmission unit, thereby realizing the rotation of the sector frame 3 to the indoor or outdoor side, which facilitates the opening and closing of this device.
[0043] Specifically, in this embodiment, the hinge shaft of the sector frame 3 is fixedly connected to it, and its two ends are rotatably connected to the inner walls of the upper and lower sides of the mounting groove 101. The hinge shaft is located on the side of the first slide groove 102 near the room. The cavity inside the column 12 and the beam 11 can be molded into an integral form using a mold.
[0044] Reference Figure 8 , Figure 8 This is an EE cross-sectional view of the window frame in this embodiment. As a further optimization, this embodiment also includes a handle 15 and a locking rod 16. The second slider 14 has a horizontal countersunk hole 141 on the side closer to the interior. One end of the handle 15 is inserted into the countersunk hole 141 and is slidably connected to it along the depth direction of the countersunk hole 141. The two locking rods 16 are horizontally fixed on both sides of the handle 15 and are symmetrical to each other. U-shaped limiting grooves 123 are respectively opened on the inner walls of both sides of the second slide groove 122. The bottom of the U-shaped limiting groove 123 is parallel to the second slide groove 122. The end of the locking rod 16 away from the handle 15 extends into the U-shaped limiting groove 123 and slides along the U-shaped limiting groove 123.
[0045] In this embodiment, the handle 15, locking rod 16, countersunk hole 141 and U-shaped limiting groove 123 on the second slider 14 are used in conjunction. By positioning the handle 15 at different positions in the countersunk hole 141, the locking rod 16 on the handle 15 can move along the U-shaped limiting groove 123. Based on the rotation of the drive screw 13, the position of the second slider 14 is locked by the two open sections of the U-shaped limiting groove 123, which further improves the stability of the vertical airflow channel during use, ensures the effect of ventilation and air replenishment in the kitchen, and meets the normal working requirements of exhaust equipment such as range hoods.
[0046] As a further optimization, in this embodiment, a spring 17 is provided in the countersunk hole 141. The spring 17 abuts against the bottom of the countersunk hole 141 and the handle 15 respectively, so as to drive the handle 15 to move away from the second slider 14.
[0047] In this embodiment, the spring 17 in the countersunk hole 141 drives the handle 15 to move away from the second slider 14, so that when the device is not in use or is in use, the locking rod 16 is stably located in the two opening sections of the U-shaped limiting groove 123. When the device is not in use, the sector frame 3 is kept stable outdoors. When the device is in use, the sector frame 3 continues to be stable, thereby keeping the vertical flow channel with the flexible membrane 5 component stable, thereby further improving the stability of the airflow into the kitchen and ensuring the effect of ventilation and air replenishment in the kitchen.
[0048] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.
Claims
1. A prefabricated ventilation device for a kitchen, configured and installed on a kitchen window, the device comprising: The window frame and the screen installed inside the window frame are vertically fixed to the window of the kitchen. The window frame is characterized by further including: a horizontally opened mounting groove on the upper and lower crossbeams of the window frame, the width of the mounting groove being greater than the width of the screen. The flow guiding assembly includes: a fan-shaped frame, an elastic self-winding shaft, a flexible membrane wound on the elastic self-winding shaft, and a driving mechanism. The fan-shaped frames are horizontally arranged in the mounting slots. The side of the fan-shaped frame near its apex corner is hinged to the middle of the mounting slot, and the side of the fan-shaped frame away from its apex corner is located outdoors. The elastic self-rolling shaft is vertically mounted on a column on one side of the window frame, and both ends of the elastic self-rolling shaft are rotatably connected to the column. The flexible membrane is connected to the side of the two fan-shaped frames near the elastic self-rolling shaft. The drive mechanism is mounted on the window frame and connected to the hinge shafts of the two sector frames respectively. It is used to drive the sector frames to rotate. When the sector frames rotate from one side of the elastic self-roller towards the interior, the elastic self-roller releases the flexible membrane until it covers the screen. The sector frames support the flexible membrane on the outside of the screen to form a vertical airflow channel. The vertical airflow channel changes the direction of airflow after it enters the kitchen from the window.
2. The prefabricated kitchen ventilation device according to claim 1, characterized in that, A first magnetic strip is fixed along the length of the flexible membrane and located in the middle of the flexible membrane. A second magnetic strip is fixed horizontally in the middle of the mesh. The first magnetic strip and the second magnetic strip have opposite magnetic properties. The first magnetic strip and the second magnetic strip attract each other, so that the distance between the flexible membrane and the mesh gradually increases from the middle of the vertical flow channel to the upper and lower ends.
3. The prefabricated kitchen ventilation device according to claim 1, characterized in that, Flexible membrane driving blocks are respectively provided in the installation slots and are located on the side of the installation slots closer to the interior. The flexible membrane driving blocks are slidably connected to the installation slots along the width direction. The flexible membrane driving blocks are fixedly connected to the flexible membranes. A first inclined surface is provided on the side of the flexible membrane driving block close to the elastic self-rolling shaft. When the sector frame rotates from the side of the elastic self-rolling shaft toward the interior, the first inclined surface abuts against a straight segment of the sector frame to push the flexible membrane driving block to move away from the elastic self-rolling shaft, so that the elastic self-rolling shaft releases the flexible membrane.
4. A prefabricated kitchen ventilation device according to claim 3, characterized in that, The flexible membrane driving block is provided with a second inclined surface, which is located on the same side of the flexible membrane driving block as the first inclined surface, and the angle between the first inclined surface and the second inclined surface is an obtuse angle.
5. A prefabricated kitchen ventilation device according to claim 1, characterized in that, The inner side of the fan-shaped frame is provided with multiple ribs at equal intervals along its radial direction. The two ends of the ribs are connected to the fan-shaped frame, and the thickness of the ribs gradually decreases from the middle to the upper and lower sides.
6. A prefabricated kitchen ventilation device according to claim 5, characterized in that, The two ends of the rib are respectively coaxially fixed with rotating shafts, and the rotating shafts are rotatably connected to the sector frame around their circumference.
7. A prefabricated kitchen ventilation device according to claim 1, characterized in that, The driving mechanism includes a lead screw and a second slider. The lead screw passes through the second slider and is threadedly connected to it. The interior of the uprights on the side of the window frame away from the elastic roller and the horizontal beams on the upper and lower sides are hollow. The lead screw is vertically arranged in the hollow uprights and rotatably connected to them. The two ends of the lead screw are respectively connected to the hinge shaft of the sector frame through a rope transmission or gear transmission unit inside the horizontal beam. A second sliding groove is vertically opened on the side of the hollow uprights near the interior. The second slider extends into the second sliding groove and is slidably connected to it.
8. A prefabricated kitchen ventilation device according to claim 7, characterized in that, Also includes: The device includes a handle, a locking rod, and a second slider. A countersunk hole is horizontally provided on the side of the slider closest to the interior. One end of the handle is inserted into the countersunk hole and slidably connected to it along the depth direction of the countersunk hole. Two locking rods are horizontally fixed on both sides of the handle and are symmetrical to each other. U-shaped limiting grooves are respectively provided on the inner walls of both sides of the second slide groove. The bottom of the U-shaped limiting groove is parallel to the second slide groove. The end of the locking rod away from the handle extends into the U-shaped limiting groove and slides along the U-shaped limiting groove.
9. A prefabricated kitchen ventilation device according to claim 8, characterized in that, A spring is installed in the countersunk hole, and the spring abuts against the bottom of the countersunk hole and the handle respectively, so as to drive the handle to move away from the second slider.