A range hood

Abstract

The application discloses a range hood. The range hood comprises a top plate, a connecting plate and a smoke plate which are sequentially connected, wherein the top plate, the connecting plate and the smoke plate surround a containing cavity, the smoke plate is concave to form a first smoke slot, a slot wall of the first smoke slot is provided with an air inlet which is communicated with the containing cavity, a floating plate which is spaced from the air inlet is arranged on a side of the air inlet which is away from the containing cavity, and flue gas enters the air inlet through a gap between the floating plate and the first smoke slot. The range hood of the application can keep clean and has low noise during use, and has strong practicability.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a range hood. Background Technology

[0002] As modern families increasingly pursue a higher quality of life, range hoods have become an indispensable piece of equipment in the kitchen. Also known as a range hood, it's a kitchen appliance used to purify the kitchen environment. Typically, household range hoods are installed above the stove, quickly removing combustion waste and harmful fumes produced during cooking and expelling them outdoors. They also condense and collect the fumes, reducing pollution, purifying the air, and providing safety features such as protection against toxic substances and explosions.

[0003] In recent years, the domestic range hood market has been promoting the concept of large air volume and strong suction. As the air volume gradually increases, the noise generated by the range hood is also getting louder. Summary of the Invention

[0004] This application provides a range hood that at least solves the technical problem of increasingly loud noise generated by existing range hoods.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a range hood, which includes: a top plate, a connecting plate and a smoke extraction plate connected in sequence, wherein the top plate, the connecting plate and the smoke extraction plate form a receiving cavity, the smoke extraction plate has a first smoke groove formed in its concave shape, the groove wall of the first smoke groove is provided with an air inlet communicating with the receiving cavity, and a floating plate spaced apart from the air inlet is provided on the side of the air inlet away from the receiving cavity, and the smoke enters the air inlet through the gap between the floating plate and the first smoke groove.

[0006] Furthermore, the pontoon is located within the first flue.

[0007] Furthermore, the orthographic projection of the floating plate onto the plane where the air inlet is located completely covers the air inlet.

[0008] Furthermore, the floating plate is set parallel to the plane where the air inlet is located.

[0009] Furthermore, the space located on the side of the floating plate near the air inlet is connected to the accommodating cavity.

[0010] Furthermore, the depth of the first flue is not less than 20mm, and the gap between the edge of the float and the first flue is greater than or equal to 15mm.

[0011] Furthermore, the smoke extraction plate includes a first smoke extraction plate and a second smoke extraction plate that are bent and connected. The air inlet includes an upper air inlet and a lower air inlet. The upper air inlet is located on the first smoke extraction plate, and the lower air inlet is located on the second smoke extraction plate. The upper air inlet is positioned facing the stove surface. The first smoke extraction plate is recessed to form a first smoke groove. The upper air inlet is located on the groove wall of the first smoke groove. The float plate is located on the side of the upper air inlet away from the receiving cavity.

[0012] Furthermore, the second smoking board is set vertically.

[0013] Furthermore, the second smoke plate is recessed to form a second smoke groove, and the lower air inlet is located on the groove wall of the second smoke groove.

[0014] Furthermore, the second smoke trough includes a first trough wall and a second trough wall that are bent and connected. The second trough wall is located between the first trough wall and the upper air inlet, and the lower air inlet is located on the second trough wall. The angle between the first trough wall and the horizontal direction is less than or equal to 45 degrees.

[0015] Furthermore, when the range hood is in operation, the air volume at the lower air inlet is greater than that at the upper air inlet, and the ratio of the air volume at the upper air inlet to the lower air inlet is in the range of 3.5 / 6.5-1.5 / 8.5.

[0016] The beneficial effects of this application are as follows: Unlike existing technologies, the range hood provided in this application includes a top plate, a connecting plate, and a smoke extraction plate connected in sequence. The top plate, connecting plate, and smoke extraction plate form a receiving cavity. A first smoke groove is recessed within the smoke extraction plate. An air inlet communicating with the receiving cavity is provided on the wall of the first smoke groove. A floating plate, spaced apart from the air inlet, is provided on the side of the air inlet away from the receiving cavity. Smoke enters the air inlet through the gap between the floating plate and the first smoke groove. The range hood of this application has a simple structure and low cost. By designing a floating plate above the air inlet, it can prevent oil droplets from directly dripping from the air inlet, improving the overall cleanliness of the range hood. It can also reduce the noise of the range hood, making it highly practical. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of one embodiment of the range hood provided in this application;

[0019] Figure 2 yes Figure 1 The diagram shows a structural schematic of the range hood from another perspective.

[0020] Figure descriptions: 10. Range hood; 11. Top plate; 12. Connecting plate; 13. Smoke extraction plate; 21. Side plate; 22. Bottom plate; 100. Air inlet; 103. First smoke trough; 15. Floating plate; 131. First smoke extraction plate; 132. Second smoke extraction plate; 101. Upper air inlet; 102. Lower air inlet; 141. Second smoke trough; 1411. First trough wall; 1412. Second trough wall; 17. Upper flow obstruction; 16. Lower flow obstruction. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0022] The terms "first," "second," etc., used in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] The purpose of a range hood is to collect and expel cooking fumes from the kitchen. Its main working principle is to expel air from the kitchen, causing the cooking fumes to flow with the expelled air, thereby collecting them and expelling them through the range hood.

[0025] This application proposes a range hood with a floating plate, which can reduce noise and provide better smoke extraction. Furthermore, the range hood can be equipped with two air inlets at different heights. Through the design of the airflow channel in the air intake section, the smoke extraction effect is improved, allowing for better smoke extraction with a smaller air volume. A detailed description of the range hood provided in this application will follow.

[0026] Please see Figure 1 As shown, Figure 1 This is a schematic diagram of an embodiment of a range hood provided in this application. Specifically, the range hood 10 includes: a top plate 11, a connecting plate 12, a smoke extraction plate 13, a side plate 21, and a bottom plate 22.

[0027] The top plate 11, connecting plate 12, smoking plate 13, and bottom plate 22 are connected in sequence, and both ends of the top plate 11, connecting plate 12, smoking plate 13, and bottom plate 22 are respectively connected to the side plate 21. The top plate 11, connecting plate 12, smoking plate 13, side plate 21, and bottom plate 22 form a receiving cavity.

[0028] The receiving cavity is part of the air duct of the range hood 10. The fan of the range hood 10 can be located within this receiving cavity. In other embodiments, the fan can also be located in other locations within the air duct, for example, the fan can be located in the air collection cavity of the air collection box at the top of the range hood 10. When the range hood 10 is installed, the outer wall of the smoke extraction plate 13 is the smoke extraction surface, which faces the cooking area of ​​the stove.

[0029] Furthermore, the smoke extraction plate 13 has a recessed first smoke groove 103. The groove wall of the first smoke groove 103 is provided with an air inlet 100 communicating with the receiving cavity. A float plate 15 is provided on the side of the air inlet 100 away from the receiving cavity, spaced apart from the air inlet 100. Smoke enters the air inlet 100 through the gap between the float plate 15 and the first smoke groove 103. The float plate 15 is located above the air inlet 100, so oil droplets at the air inlet 100 will not drip directly onto the outside of the range hood 10, making the overall appearance of the range hood 10 look cleaner. Moreover, the range hood 10 can reduce noise during operation.

[0030] Furthermore, one end of the float plate 15 can be connected to the wall of the first smoke trough 103, and the other end of the float plate 15 extends into the space of the first smoke trough 103, so that the float plate 15 is placed in the first smoke trough 103, reducing the overall volume of the range hood 10 and making the entire range hood 10 cleaner.

[0031] Optionally, the float plate 15 and the smoke extraction plate 13 can be fixedly connected, that is, the float plate 15 and the smoke extraction plate 13 can be configured to be non-detachable. For example, the float plate 15 and the smoke extraction plate 13 can be fixed by welding or bonding. Preferably, the float plate 15 and the smoke extraction plate 13 can be integrally formed, which can improve the overall structural stability of the range hood 10. In other embodiments, the float plate 15 and the smoke extraction plate 13 can also be configured to be detachably connected. For example, the float plate 15 and the smoke extraction plate 13 can be connected by snap-fit, which facilitates the disassembly of the float plate 15. The float plate 15 and the smoke extraction plate 13 can also be connected by screws and threaded holes, or the float plate 15 and the smoke extraction plate 13 can be fixed by insertion.

[0032] When the float plate 15 and the smoke extraction plate 13 are detachably connected, the user can disassemble the float plate 15 as needed. For example, when it is necessary to clean the air inlet 100, the float plate 15 can be disassembled to facilitate the user to clean the first smoke trough 103 and to make it easier to clean the float plate 15, which brings great convenience to the user.

[0033] The shape of the float plate 15 can be the same as that of the air inlet 100 to better fit the air inlet 100. For example, the shape of both the float plate 15 and the air inlet 100 can be square to correspond to the cooking area.

[0034] Optionally, the orthographic projection of the float plate 15 onto the plane of the air inlet 100 completely covers the air inlet 100. That is, the area of ​​the float plate 15 can be larger than the area of ​​the air inlet 100 to completely block the air inlet 100 and improve the overall neatness of the range hood 10. Preferably, the float plate 15 is arranged parallel to the plane of the air inlet 100 so that the gap between the float plate 15 and the perimeter of the first smoke groove 103 is the same, thereby making the force on the smoke more uniform.

[0035] Furthermore, the depth of the first smoke trough 103 is not less than 20 mm, and the gap between the edge of the float plate 15 and the first smoke trough 103 is greater than or equal to 15 mm. That is, there should be a gap of not less than 15 mm between the first smoke trough 103 and the float plate 15 in the front, left, and right directions to ensure sufficient space for the flue gas to pass through. Optionally, there may also be a certain gap between the rear side of the float plate 15 and the first smoke trough 103, so that the flue gas can also enter the air inlet 100 through the rear gap.

[0036] The space on the side of the float plate 15 near the air inlet 100 is connected to the accommodating cavity inside the range hood 10. In this way, the condensed oil on the float plate 15 can flow into the interior of the range hood 10, preventing the condensed oil from accumulating and dripping.

[0037] In the above embodiment, the air inlet 100 is disposed in the first smoke trough 103, and a floating plate 15 is disposed above the air inlet 100. Due to the shielding effect of the floating plate 15, oil droplets at the air inlet 100 can be prevented from falling onto the outside of the range hood, making the range hood 10 cleaner. Moreover, the smoke enters the air inlet 100 through the gap between the floating plate 15 and the first smoke trough 103, which can reduce the noise of the range hood 10 and has strong practicality.

[0038] Furthermore, such as Figure 1 As shown, the smoke extraction plate 13 includes a first smoke extraction plate 131 and a second smoke extraction plate 132 connected to each other. The air inlet 100 includes an upper air inlet 101 and a lower air inlet 102. The upper air inlet 101 is located on the first smoke extraction plate 131, and the lower air inlet 102 is located on the second smoke extraction plate 132. The upper air inlet 101 faces the stove surface. The first smoke extraction plate 131 is recessed to form a first smoke groove 103. The upper air inlet 101 is located on the groove wall of the first smoke groove 103. The float plate 15 is located on the side of the upper air inlet 101 away from the receiving cavity.

[0039] In the above embodiment, an upper air inlet 101 and a lower air inlet 102 are provided on the smoke extraction plate 13. The upper air inlet 101 and the lower air inlet 102 are at different heights from the stove surface, with the distance between the lower air inlet 102 and the stove surface being smaller than the distance between the upper air inlet 101 and the stove surface. Both the lower air inlet 102 and the upper air inlet 101 can be used to absorb the fumes generated during cooking. A certain amount of airflow enters the range hood through both the upper air inlet 101 and the lower air inlet 102, but generally, not necessarily, any fumes enter the range hood 10 through either air inlet 100. Functionally, the lower air inlet 102 mainly changes the direction of fumes flow, while the upper air inlet 101 mainly serves to expel fumes that are not drawn into the space by the lower air inlet 102. A floating plate 15 is provided at the upper air inlet 101 to reduce the noise of the range hood and to prevent oil dripping from the upper air inlet 101.

[0040] The design principle of the upper air inlet 101 and lower air inlet 102 in this application is as follows: During the upward movement of the flue gas, it undergoes additional displacement due to the airflow generated by the work done by the range hood 10. The minimum airflow of the range hood is obtained when the additional displacement is 0, at which point all the flue gas is discharged smoothly (i.e., the function of the upper air inlet 101). However, since the flue gas itself occupies a large space, this minimum airflow requires the range hood 10 to have a large depth dimension and no significant obstruction to the flow after the air inlet 100 to prevent pressure from affecting the upstream flow and causing smoke to escape, thereby affecting the appearance of the range hood and the overall aesthetics of the kitchen. Therefore, in this application, the lower air inlet 102 is designed. The function of the lower air inlet 102 is to provide force to the flue gas through the negative pressure generated by the airflow, so that when the flue gas reaches the height of the upper air inlet 101, its depth and width are smaller, thereby reducing the volume of the range hood 10. Here, the depth refers to the length of the flue gas along the direction perpendicular to the wall. Width refers to the length of the smoke along the direction from the left end to the right end of the range hood 10.

[0041] Furthermore, when the range hood 10 is in operation, the air volume at the lower air inlet 102 is greater than the air volume at the upper air inlet 101, so as to achieve the desired smoke extraction effect even at the minimum air volume. The minimum air volume here can be less than 13 cubic meters.

[0042] Optionally, when the range hood 10 is in operation, the ratio of the air volume of the lower air inlet 102 to the total air volume of the range hood 10 is greater than or equal to 60%. Preferably, the ratio of the air volume of the lower air inlet 102 to the total air volume of the range hood 10 is greater than or equal to 75%. Further, the air volume ratio of the upper air inlet 101 to the lower air inlet 102 can be between 3.5:6.5 and 1.5:8.5 to achieve the desired smoke extraction effect even at minimum air volume.

[0043] Optionally, the airflow ratio of the upper air inlet 101 and the lower air inlet 102 can be achieved by adjusting the area ratio of the two air inlets 100 (e.g., reducing the airflow area of ​​the upper air inlet 101 grille) or by adding a flow-blocking structure inside the unit. The structure for achieving this airflow ratio is within the scope of what those skilled in the art can understand, and will not be described in detail here.

[0044] Furthermore, the angle between the upper air inlet 101 and the horizontal plane is not less than 10 degrees. The angle between the upper air inlet 101 and the horizontal plane is less than 30 degrees. The lower air inlet 102 is vertically installed to avoid the acceleration of flue gas and oil circuit risks caused by the exhaust from the lower air inlet 102. This arrangement ensures that the lower air inlet 102 exerts a force on the flue gas towards the wall; the upper air inlet 101 does not exert a force on the flue gas or only exerts a vertically upward force.

[0045] Furthermore, the air volume of the lower air inlet 102 is negatively correlated with the distance from the front end of the upper air inlet 101 to the wall. In other words, the greater the distance from the front end of the upper air inlet 101 to the wall, the smaller the air volume of the lower air inlet 102 can be designed.

[0046] When designing the upper air inlet 101 and lower air inlet 102 of the range hood 10, the following relationships should be met to satisfy the air volume requirements: the higher the lower air inlet 102 is (the greater the distance from the stove surface), the greater the air volume required by the lower air inlet 102; the closer the lower air inlet 102 is to the wall, the greater the air volume required by the lower air inlet 102; the closer the front end of the upper air inlet 101 is to the wall, the greater the air volume required by the lower air inlet 102.

[0047] Based on the above design principles, and through experimental testing, the design dimensional parameters of the upper air inlet 101 and the lower air inlet 102 are as follows:

[0048] When the range hood 10 is installed, the distance between the bottom of the lower air inlet 102 and the cooktop surface is greater than or equal to 200mm and less than or equal to 400mm, preferably not less than 300mm but not more than 400mm, to ensure that its suction power takes effect earlier.

[0049] The vertical height of the lower air inlet 102 is greater than or equal to 50mm and less than or equal to 150mm to ensure that the flow velocity is fast enough, so that the size and strength of the negative pressure zone are sufficient to have a design-sized impact on the flue gas.

[0050] The height of the lower air inlet 102 shall not be less than 50mm to prevent excessive noise or whistling caused by excessive airflow.

[0051] The average distance between the lower air inlet 102 and the wall is not less than 70mm, so as to ensure that the lower air inlet 102 can effectively control smoke sources located far from the wall.

[0052] When the range hood 10 is installed, the distance between the end of the upper air inlet 101 furthest from the wall (front end) and the wall is not less than 200mm. Preferably, the distance between the end of the upper air inlet 101 furthest from the wall and the wall is greater than or equal to 230mm, to ensure that the fumes affected by the lower air inlet 102 can be smoothly discharged without requiring a large air volume to further alter their trajectory. The distance between the front end of the upper air inlet 101 and the corresponding necessary structures and the wall is not greater than 350mm, preferably not greater than 300mm, to ensure the aesthetics of the entire unit.

[0053] Furthermore, the left and right positions of the upper air inlet 101 should be such that the smoke can reach within the range of that height, so as to meet the requirement of smooth smoke discharge and at the same time make the air volume more concentrated. In some embodiments, the distance from the left and right positions to the central axis of the range hood 10 is preferably between 300-350mm.

[0054] The dimensions described above are the dimensions corresponding to the minimum exhaust volume, and the minimum dimensions corresponding to the minimum exhaust volume that meet the smoke extraction effect without being too large.

[0055] Furthermore, such as Figure 1 and Figure 2 As shown, Figure 2 yes Figure 1 The schematic diagram of the range hood 10 from another perspective shows that the first smoke extraction plate 131 is arranged substantially parallel to the horizontal plane, and the second smoke extraction plate 132 is arranged vertically. A second smoke groove 141 is formed concave within the second smoke extraction plate 132. The lower air inlet 102 is located on the groove wall of the second smoke groove 141. The second smoke groove 141 includes a first groove wall 1411 and a second groove wall 1412 that are bent and connected. The second groove wall 1412 is located between the first groove wall 1411 and the upper air inlet 101, and the lower air inlet 102 is located on the second groove wall 1412. The angle between the first groove wall 1411 and the horizontal direction is less than or equal to 45 degrees. In the above embodiment, a guide slope (first groove wall 1411) can be added inside the lower air inlet 102 to optimize local airflow.

[0056] Furthermore, such as Figure 1 As shown, a flow-blocking structure can be added to the middle of the lower air inlet 102 and the upper air inlet 101 to make the negative pressure zone stronger near the smoke source.

[0057] Specifically, such as Figure 1 As shown, a lower flow obstruction member 16 is provided at the lower air inlet 102. The lower flow obstruction member 16 is used to block the flue gas, dividing the lower air inlet 102 into a first lower air inlet and a second lower air inlet arranged horizontally. The lower flow obstruction member 16 is added in the middle of the lower air inlet 102 to make the negative pressure zone stronger near the smoke source. Optionally, the width of the lower flow obstruction member 16 is between 100-250mm.

[0058] like Figure 1 As shown, an upper baffle 17 is provided at the upper air inlet 101. The upper baffle 17 is used to block the flue gas and divides the upper air inlet 101 into a first upper air inlet and a second upper air inlet arranged laterally, so that the air volume distribution of the upper air inlet 101 corresponds to the smoke source. Optionally, the width of the upper baffle 17 is between 100-300mm.

[0059] In summary, the range hood 10 provided in this application has a simple structure, low cost, reduces oil fume overflow, and improves the stability of oil fume extraction. The application utilizes a structure with a floating plate 15, which prevents oil droplets from directly dripping from the upper air inlet 101, improving the overall cleanliness of the range hood 10 and reducing noise. The lower air inlet 102 creates negative pressure on the airflow, providing force to the fumes, resulting in a smaller depth and width of the fumes when they reach the height of the upper air inlet 101, thus reducing the size of the range hood 10. By rationally configuring the airflow ratio between the upper air inlet 101 and the lower air inlet 102, a smaller airflow can achieve the same extraction effect, thereby reducing perceived noise for the user.

[0060] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A range hood, characterized in that, The range hood includes a top plate, a connecting plate, and a smoke extraction plate connected in sequence. The top plate, the connecting plate, and the smoke extraction plate form a receiving cavity. The smoke extraction plate has a first smoke groove recessed inward. The groove wall of the first smoke groove is provided with an air inlet communicating with the receiving cavity. A floating plate is provided on the side of the air inlet away from the receiving cavity, which is spaced apart from the air inlet. Smoke enters the air inlet through the gap between the floating plate and the first smoke groove.

2. The range hood according to claim 1, characterized in that, The floating plate is located inside the first flue.

3. The range hood according to claim 2, characterized in that, The floating plate's orthographic projection on the plane where the air inlet is located completely covers the air inlet.

4. The range hood according to claim 2, characterized in that, The floating plate is arranged parallel to the plane where the air inlet is located.

5. The range hood according to claim 2, characterized in that, The space located on the side of the float plate near the air inlet is connected to the accommodating cavity.

6. The range hood according to claim 2, characterized in that, The depth of the first smoke trough is not less than 20mm, and the gap between the edge of the float plate and the first smoke trough is greater than or equal to 15mm.

7. The range hood according to claim 1, characterized in that, The smoke extraction plate includes a first smoke extraction plate and a second smoke extraction plate that are bent and connected. The air inlet includes an upper air inlet and a lower air inlet. The upper air inlet is located on the first smoke extraction plate, and the lower air inlet is located on the second smoke extraction plate. The upper air inlet faces the stove surface. The first smoke plate is recessed to form the first smoke groove, the upper air inlet is disposed on the groove wall of the first smoke groove, and the float plate is disposed on the side of the upper air inlet away from the accommodating cavity.

8. The range hood according to claim 7, characterized in that, The second smoking plate is set vertically.

9. The range hood according to claim 7, characterized in that, The second smoke plate has a recessed second smoke groove, and the lower air inlet is located on the groove wall of the second smoke groove.

10. The range hood according to claim 9, characterized in that, The second smoke trough includes a first trough wall and a second trough wall that are bent and connected. The second trough wall is located between the first trough wall and the upper air inlet. The lower air inlet is located on the second trough wall. The angle between the first trough wall and the horizontal direction is less than or equal to 45 degrees.

11. The range hood according to claim 7, characterized in that, When the range hood is in operation, the air volume of the lower air inlet is greater than that of the upper air inlet, and the ratio of the air volume of the upper air inlet to the lower air inlet is in the range of 3.5 / 6.5-1.5 / 8.5.

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