Range hood

Abstract

The utility model discloses a range hood. The range hood comprises a top plate, a connecting plate and a smoke suction plate which are sequentially connected, the top plate, the connecting plate and the smoke suction plate define a containing cavity, the smoke suction plate is concaved inwards to form a first smoke groove, an air inlet communicated with the containing cavity is formed in the groove wall of the first smoke groove, and a floating plate spaced from the air inlet is arranged on the side, away from the containing cavity, of the air inlet; smoke enters the air inlet through a gap between the floating plate and the first smoke groove. The range hood provided by the utility model can be kept clean and tidy during use, is low in noise and has high practicability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a range hood. BACKGROUND

[0002] With the continuous improvement of the pursuit of life quality in modern families, the range hood has become one of the indispensable devices in the kitchen. The range hood, also known as the extractor hood, is a kind of kitchen appliance for purifying the kitchen environment. Generally, the range hood used in the family is installed above the kitchen stove, which can quickly remove the waste of the stove combustion and the oil fume harmful to human body generated in the cooking process, and discharge it outdoors, while condensing and collecting the oil fume, reducing pollution, purifying air, and having the safety guarantee function of preventing poisoning and explosion.

[0003] In recent years, the domestic range hood market has always been promoting the concept of large air volume and large suction force. With the gradual increase of air volume, the noise generated by the range hood is also getting bigger and bigger. CONTENT OF THE INVENTION

[0004] The present application provides a range hood, which at least solves the technical problem that the noise generated by the range hood is getting bigger and bigger in the prior art.

[0005] To solve the above technical problems, one technical scheme adopted by the present application is to provide a range hood, which comprises: a top plate, a connecting plate and a smoke suction plate connected in sequence, wherein the top plate, the connecting plate and the smoke suction plate surround to form a containing cavity, the smoke suction plate is concave to form a first smoke slot, the slot wall of the first smoke slot is provided with an air inlet communicated with the containing cavity, the side of the air inlet away from the containing cavity is provided with a floating plate spaced from the air inlet, and the flue gas enters the air inlet through the gap between the floating plate and the first smoke slot.

[0006] Further, the floating plate is located in the first smoke slot.

[0007] Further, the floating plate completely covers the air inlet in the orthogonal projection on the plane where the air inlet is located.

[0008] Further, the floating plate is arranged in parallel with the plane where the air inlet is located.

[0009] Further, the space on the side of the floating plate close to the air inlet is communicated with the containing cavity.

[0010] Further, the depth of the first smoke slot is not less than 20mm, and the gap between the edge of the floating plate and the first smoke slot is greater than or equal to 15mm.

[0011] Further, the smoke suction plate comprises a first smoke suction plate and a second smoke suction plate connected by bending, the air inlet comprises an upper air inlet and a lower air inlet, the upper air inlet is arranged on the first smoke suction plate, the lower air inlet is arranged on the second smoke suction plate, and the upper air inlet is arranged towards the cooking top.

[0012] Further, the second smoke suction plate is arranged vertically.

[0013] Further, the second smoke suction plate is concave to form a second smoke slot, and the lower air inlet is arranged on the slot wall of the second smoke slot.

[0014] Further, the second smoke slot comprises a first slot wall and a second slot wall connected by bending, the second slot wall is located between the first slot wall and the upper air inlet, the lower air inlet is arranged on the second slot wall, and the angle between the first slot wall and the horizontal direction is less than or equal to 45 degrees.

[0015] Further, in the working state of the range hood, the air volume of the lower air inlet is greater than that of the upper air inlet, and the air volume ratio of the upper air inlet to the lower air inlet ranges from 3.5 / 6.5 to 1.5 / 8.5.

[0016] The range hood provided by the present application comprises a top plate, a connecting plate and a smoke suction plate connected in sequence, wherein the top plate, the connecting plate and the smoke suction plate form a containing cavity, the smoke suction plate is concave to form a first smoke slot, the slot wall of the first smoke slot is provided with an air inlet communicating with the containing cavity, the side of the air inlet away from the containing cavity is provided with a floating plate spaced from the air inlet, and smoke gas enters the air inlet through the gap between the floating plate and the first smoke slot. The range hood provided by the present application has simple structure and low cost. By designing the floating plate above the air inlet, the oil drops at the air inlet can be prevented from directly falling, the overall cleanliness of the range hood is improved, the noise of the range hood is reduced, and the range hood has strong practicability. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0018] Figure 1 is a structural schematic diagram of an embodiment of the range hood provided by the present application;

[0019] Figure 2 is Figure 1 is a structural schematic diagram of another view of the range hood shown in the figure.

[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] The application provides a range hood with a floating plate, which can reduce the noise of the range hood and has good smoke suction effect. In addition, the range hood can be provided with two air inlets with different heights, and the smoke suction effect of the range hood is improved through the design of the flow channel of the air inlet part of the range hood, so that the range hood can achieve better smoke suction effect with smaller air volume. The range hood provided by the application will be described in detail below.

[0026] Please refer to Figure 1 as shown, Figure 1 is a structural schematic view of an embodiment of the range hood provided by the application. Specifically, the range hood 10 comprises a top plate 11, a connecting plate 12, a smoke suction plate 13, a side plate 21 and a bottom plate 22.

[0027] The top plate 11, the connecting plate 12, the smoke suction plate 13 and the bottom plate 22 are sequentially connected, and the two ends of the top plate 11, the connecting plate 12, the smoke suction plate 13 and the bottom plate 22 are connected with the side plate 21. The top plate 11, the connecting plate 12, the smoke suction plate 13, the side plate 21 and the bottom plate 22 surround to form a containing cavity.

[0028] The containing cavity is part of the air duct of the range hood 10. The fan of the range hood 10 can be arranged in the containing cavity. In other embodiments, the fan can also be arranged at other positions of the air duct, for example, the fan can also be arranged in the air collecting cavity of the air collecting box at the top of the range hood 10. In the installed state, the outer wall of the smoke suction plate 13 is the smoke suction surface, and the smoke suction surface is arranged towards the cooking area of the cooking appliance.

[0029] Further, the smoke suction plate 13 is concave to form a first smoke slot 103, and the slot wall of the first smoke slot 103 is provided with an air inlet 100 communicating with the containing cavity. The side of the air inlet 100 away from the containing cavity is provided with a floating plate 15 spaced from the air inlet 100, and the flue gas enters the air inlet 100 through the gap between the floating plate 15 and the first smoke slot 103. The floating plate 15 is arranged above the air inlet 100, and the oil droplets at the air inlet 100 will not directly drop to the outside of the range hood 10, which can make the whole range hood 10 look more tidy, and can reduce the noise of the range hood 10 during operation.

[0030] Further, one end of the floating plate 15 can be connected with the slot wall of the first smoke slot 103, and the other end of the floating plate 15 extends towards the space in the first smoke slot 103, so that the floating plate 15 is arranged in the first smoke slot 103, reducing the overall volume of the range hood 10, and making the whole range hood 10 more tidy.

[0031] Optionally, the floating plate 15 and the smoke suction plate 13 can be fixedly connected, that is, the floating plate 15 and the smoke suction plate 13 can be arranged in a non-detachable connection manner. For example, the floating plate 15 and the smoke suction plate 13 are fixedly connected by welding, adhesion or the like. Preferably, the floating plate 15 and the smoke suction plate 13 can be integrally formed, which can improve the stability of the overall structure of the range hood 10. In other embodiments, the floating plate 15 and the smoke suction plate 13 can also be arranged in a detachable connection manner. For example, the floating plate 15 and the smoke suction plate 13 are connected by buckling, which facilitates the disassembly of the floating plate 15. The floating plate 15 and the smoke suction plate 13 can also be connected by screw holes and screws, or the floating plate 15 and the smoke suction plate 13 can also be fixed by insertion or the like.

[0032] When the floating plate 15 and the smoke suction plate 13 are detachably connected, the user can disassemble the floating plate 15 as needed. For example, when the air inlet 100 needs to be cleaned, the floating plate 15 can be disassembled, which facilitates the user to clean the first smoke slot 103 and also facilitates the cleaning of the floating plate 15, thereby greatly facilitating the user.

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

[0034] Optionally, the floating plate 15 completely covers the air inlet 100 in the normal projection of the plane where the air inlet 100 is located, that is, the area of the floating plate 15 can be greater than the area of the air inlet 100 to completely shield the air inlet 100 and improve the overall cleanliness of the range hood 10. Preferably, the floating plate 15 is arranged in parallel with the plane where the air inlet 100 is located to make the gap size around the floating plate 15 and the first smoke slot 103 the same, thereby making the stress of the flue gas more uniform.

[0035] Further, the depth of the first smoke slot 103 is not less than 20 mm, and the gap between the edge of the floating plate 15 and the first smoke slot 103 is greater than or equal to 15 mm, that is, the gap between the first smoke slot 103 and the floating plate 15 in the front, left and right directions should be not less than 15 mm to ensure sufficient space for the flue gas to pass through. Optionally, the rear side of the floating plate 15 can also have a certain gap with the first smoke slot 103 to enable the flue gas to also pass through the gap on the rear side into the air inlet 100.

[0036] The space on the side of the floating plate 15 close to the air inlet 100 is in communication with the accommodating cavity inside the range hood 10, which can enable the condensed oil on the floating plate 15 to flow into the interior of the range hood 10, thereby avoiding the accumulation and dripping of the condensed oil.

[0037] In the above embodiment, the air inlet 100 is arranged in the first smoke slot 103, and the floating plate 15 is arranged 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 outside the range hood, so that the range hood 10 is more tidy, and the smoke gas enters the air inlet 100 through the gap between the floating plate 15 and the first smoke slot 103, so that the noise of the range hood 10 is reduced, and the range hood 10 has strong practicability.

[0038] Further, as shown in Figure 1 The smoke suction plate 13 includes a first smoke suction plate 131 and a second smoke suction plate 132 connected to each other, and the air inlet 100 includes an upper air inlet 101 and a lower air inlet 102. The upper air inlet 101 is arranged on the first smoke suction plate 131, and the lower air inlet 102 is arranged on the second smoke suction plate 132. The upper air inlet 101 is arranged towards the cooktop. The first smoke slot 103 is concave in the first smoke suction plate 131, and the upper air inlet 101 is arranged on the slot wall of the first smoke slot 103. The floating plate 15 is arranged on the side of the upper air inlet 101 away from the accommodating cavity.

[0039] In the above embodiment, the upper air inlet 101 and the lower air inlet 102 are arranged on the smoke suction plate 13. The upper air inlet 101 and the lower air inlet 102 are different in height from the cooktop. The distance between the lower air inlet 102 and the cooktop is less than the distance between the upper air inlet 101 and the cooktop. The lower air inlet 102 and the upper air inlet 101 can both be used to absorb smoke gas generated during cooking. A certain amount of airflow passes through the upper air inlet 101 and the lower air inlet 102 into the range hood. Generally, but not necessarily, smoke gas passes through the two air inlets 100 into the range hood 10. Functionally, the lower air inlet 102 mainly changes the flow direction of the smoke gas, and the upper air inlet 101 mainly discharges the smoke gas in the space that is not sucked into the lower air inlet 102. The floating plate 15 arranged at the upper air inlet 101 can reduce the noise of the range hood and prevent oil droplets at the upper air inlet 101 from falling.

[0040] The design principle of the upper air inlet 101 and the lower air inlet 102 of the present application is that the smoke is additionally displaced during the process of rising due to the airflow generated by the range hood 10. The minimum air volume of the range hood is obtained when the additional displacement is 0, at which time all the smoke is discharged by gravity (i.e. the upper air inlet 101 works). However, since the smoke itself occupies a large space, the minimum air volume requires that the range hood 10 has a large depth and that the flow is not significantly forced after the air inlet 100 to prevent the pressure from affecting the upstream flow and causing smoke to run, thereby affecting the appearance of the range hood and the overall aesthetics of the kitchen. Therefore, in the present application, the lower air inlet 102 is designed to provide the smoke with a force by the negative pressure generated by the airflow so that the depth and width of the smoke are smaller when it reaches the height of the upper air inlet 101, thereby reducing the size of the range hood 10. The depth here refers to the length of the smoke in the direction perpendicular to the wall surface. The width refers to the length of the smoke in the direction from the left end to the right end of the range hood 10.

[0041] Further, the air volume of the lower air inlet 102 is greater than that of the upper air inlet 101 in the working state of the range hood 10 to achieve the smoke exhaust effect at the minimum air volume. The minimum air volume can be less than 13 cubic meters.

[0042] Optionally, 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% in the working state of the range hood 10. 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 smoke exhaust effect at the minimum air volume.

[0043] Optionally, the air volume ratio of the upper air inlet 101 and the lower air inlet 102 can be achieved by the area ratio of the two air inlets 100 (such as reducing the air passage area of the upper air inlet 101 grille) or by increasing the flow resistance structure inside the machine. The implementation structure of the air volume ratio is within the scope of understanding for those skilled in the art, and will not be described in detail here.

[0044] Further, 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 arranged to avoid the risk of smoke acceleration and oil path caused by the air exhaust of the lower air inlet 102. This arrangement makes the lower air inlet 102 generate a force pointing to the wall surface on the smoke; the upper air inlet 101 does not generate a force on the smoke or only generates a vertically upward force.

[0045] Further, 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. That is, 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] In designing the upper air inlet 101 and the lower air inlet 102 of the range hood 10, the following relationships should be met to meet the air volume requirement: the higher the lower air inlet 102 (the greater the distance from the cooktop), the greater the air volume required by the lower air inlet 102; the closer the lower air inlet 102 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 to the wall, the greater the air volume required by the lower air inlet 102.

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

[0048] In the installed state of the range hood 10, the distance between the bottom end of the lower air inlet 102 and the cooktop is greater than or equal to 200 mm and less than or equal to 400 mm, preferably not less than 300 mm but not greater than 400 mm, to ensure that the suction effect occurs early.

[0049] The height of the lower air inlet 102 in the vertical direction is greater than or equal to 50 mm and less than or equal to 150 mm, to ensure that the flow rate is fast enough, and thus the size and strength of the negative pressure zone are sufficient to affect the smoke to the designed size.

[0050] The height of the lower air inlet 102 is not less than 50 mm, to prevent the flow rate from being too fast, resulting in excessive noise or howling.

[0051] The average distance between the lower air inlet 102 and the wall is not less than 70 mm, to ensure the effect of the lower air inlet 102 on the smoke source away from the wall.

[0052] In the installed state of the range hood 10, the distance from the end (front end) of the upper air inlet 101 away from the wall to the wall is not less than 200 mm. Preferably, the distance between the end of the upper air inlet 101 away from the wall to the wall is greater than or equal to 230 mm, to ensure that the smoke affected by the lower air inlet 102 can be discharged by the force of nature without the need for a large air volume to further change its trajectory. The distance from the front end of the upper air inlet 101 to the wall is not greater than 350 mm, preferably not greater than 300 mm, to ensure the aesthetics of the entire machine.

[0053] Further, the left and right to points of the upper air inlet 101 should exactly meet the height range that the smoke can reach, to meet the requirement of discharging the smoke by the force of nature, and to make the air volume more concentrated. In some embodiments, the distance from the left and right to points to the central axis of the range hood 10 is preferably between 300-350 mm.

[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 structure of the range hood 10 provided by the application is simple, the cost is low, the oil smoke overflow is reduced, and the stability of the range hood 10 for smoke suction is improved. In the application, by designing the structure with the floating plate 15, the shielding effect of the floating plate 15 can avoid the oil droplets of the upper air inlet 101 from directly falling, improve the overall cleanliness of the range hood 10, and reduce the noise generated by the range hood 10. By designing the lower air inlet 102, the negative pressure generated by the airflow passing through the lower air inlet 102 provides the smoke with a force, so that when the smoke reaches the height of the upper air inlet 101, the depth and width of the smoke are smaller, thereby reducing the size of the range hood 10; by reasonably configuring the air volume ratio of the upper air inlet 101 and the lower air inlet 102, a smaller air volume can be used to achieve the same smoke suction effect, thereby reducing the user's hearing noise.

[0060] The above description is only an embodiment of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the application.

Claims

1. A range hood characterized by, The range hood comprises a top plate, a connecting plate and a smoke plate connected in sequence, wherein the top plate, the connecting plate and the smoke plate surround a receiving cavity, the smoke plate is concave to form a first smoke slot, the slot wall of the first smoke slot is provided with an air inlet communicating with the receiving cavity, and the side of the air inlet away from the receiving cavity is provided with a floating plate spaced from the air inlet, and flue gas enters the air inlet through the gap between the floating plate and the first smoke slot.

2. The hood according to claim 1, characterized in that, The floating plate is located in the first smoke slot.

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

4. The 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 hood according to claim 2, characterized in that, The space on the side of the floating plate close to the air inlet communicates with the receiving cavity.

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

7. The hood according to claim 1, characterized in that, The smoke plate comprises a first smoke plate and a second smoke plate connected by bending, the air inlet comprises an upper air inlet and a lower air inlet, the upper air inlet is arranged on the first smoke plate, the lower air inlet is arranged on the second smoke plate, and the upper air inlet is arranged towards the cooktop. The first smoke plate is concave to form the first smoke slot, and the upper air inlet is arranged on the slot wall of the first smoke slot.

8. The hood according to claim 7, characterized in that, The second smoke plate is arranged vertically.

9. The hood according to claim 7, characterized in that, The second smoke plate is concave to form a second smoke slot, and the lower air inlet is arranged on the slot wall of the second smoke slot.

10. The hood according to claim 9, characterized in that, The second smoke slot comprises a first slot wall and a second slot wall connected by bending, the second slot wall is located between the first slot wall and the upper air inlet, the lower air inlet is arranged on the second slot wall, and the angle between the first slot wall and the horizontal direction is less than or equal to 45 degrees.

11. The hood according to claim 7, characterized in that, In the working state of the range hood, the air volume of the lower air inlet is greater than that of the upper air inlet, and the air volume ratio of the upper air inlet to the lower air inlet ranges from 3.5 / 6.5 to 1.5 / 8.5.

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