Range hood, exhaust fume collecting hood and back plate of exhaust fume collecting hood

Abstract

The utility model relates to a range hood, an exhaust fume collecting hood and a back plate of the exhaust fume collecting hood, the back plate of the exhaust fume collecting hood comprises the back plate, the back plate is provided with a vibration receiving part used for receiving vibration of a draught fan and a plurality of first profiles arranged in a radial extending mode from the vibration receiving part to the periphery of the back plate, and the periphery of the back plate is connected with a wall through at least one buffering piece. The back plate of the exhaust fume collecting hood and the vibration energy generated when the fan works are transmitted to the vibration receiving part, and the back plate is provided with the plurality of first profiles which are dispersed in the radial manner, so that the vibration energy can be effectively dispersed and transmitted to the periphery of the back plate in the radial manner under the conditions that the strength is improved and the vibration is reduced; the periphery of the back plate is connected with other panels of the exhaust fume collecting hood on the exhaust fume collecting hood, so that the strength of the periphery of the back plate is relatively high, the vibration energy transmitted to the periphery of the back plate can be effectively consumed, and the low-frequency vibration of the whole machine is further reduced.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a range hood, a fume hood and a back plate thereof. Background Art

[0002] Range hoods are common kitchen appliances in daily life, which can effectively remove the fumes generated during cooking in the kitchen. Most range hoods in related technologies use fans as the main power source. When the range hood is working, the smoke entering the range hood is discharged to the outside flue through a check valve under the centrifugal action of the rotation of the fan wheel. Among them, the fan is driven by a motor to drive the fan wheel to do work. Due to manufacturing errors, the dynamic balance of the fan wheel will have a certain deviation. When the fan wheel rotates at high speed, it will generate certain vibrations. This vibration will be transmitted to the wind cabinet through the motor bracket, and then transmitted to the whole machine from the connection point between the wind cabinet and the smoke hood, causing the whole machine to produce a certain low-frequency vibration, thereby causing a large vibration noise. Summary of the invention

[0003] The first technical problem solved by the present application is to provide a back plate of a smoke hood, which can effectively reduce noise and has low cost.

[0004] The second technical problem solved by the present application is to provide a smoke collecting hood which can effectively reduce noise and has low cost.

[0005] The third technical problem solved by the present application is to provide a range hood which can effectively reduce noise while having a low cost.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A back plate of a smoke collecting hood is provided with a vibration receiving portion for receiving vibration of a fan and a plurality of first pressure profiles radially extending from the vibration receiving portion toward the periphery of the back plate.

[0008] The back plate of the smoke hood described in the present application has the following beneficial effects compared with the background technology:

[0009] The back plate of the above-mentioned smoke hood transmits the vibration energy generated by the fan when it is working to the vibration receiving part. The back plate is provided with a plurality of radially dispersed first pressure profiles, which can effectively transmit the vibration energy radially to the periphery of the back plate while improving strength and reducing vibration. Since the periphery of the back plate is connected to other panels of the smoke hood on the smoke hood, the periphery of the back plate is relatively strong, so that the vibration energy transmitted to the periphery of the back plate can be effectively consumed, so as to further reduce the low-frequency vibration of the whole machine.

[0010] In one embodiment, all of the first profiles are formed by recessing the outer wall of the back plate toward the interior of the smoke collecting hood.

[0011] In one embodiment, the vibration receiving portion is located at the top of the back plate, and all the first pressure profiles are radially extended from the top of the back plate toward the bottom of the back plate; or, the vibration receiving portion is located in the middle of the back plate, and all the first pressure profiles are radially extended from the middle of the back plate toward the four sides of the back plate.

[0012] In one embodiment, when the vibration receiving part is located at the top of the back plate, the number of the first pressure profiles is 3 to 15; when the vibration receiving part is located in the middle part of the back plate, the number of the first pressure profiles is 8 to 40.

[0013] In one of the embodiments, a second pressure profile is disposed on the back plate, and the second pressure profile is located between the vibration receiving portion and all of the first pressure profiles, so as to separate the vibration receiving portion from all of the first pressure profiles.

[0014] In one embodiment, the depth d1 of the first pressing profile is 1.5 mm to 3 mm; the depth d2 of the second pressing profile is 3 mm to 6 mm.

[0015] In one embodiment, the vibration receiving part is located at the top of the back plate, and the second pressure profile is extended along the top edge of the back plate; or, the vibration receiving part is located in the middle of the back plate, and the second pressure profile is circumferentially arranged around the vibration receiving part.

[0016] In one embodiment, when the second pressure profile is extended along the top edge of the back plate, a third pressure profile is also provided on the periphery of the back plate; the opposite ends of the third pressure profile are respectively connected to the second pressure profile to form an annular pressure profile, and the entire first pressure profile is located in the internal area of ​​the annular pressure profile.

[0017] In one embodiment, the third profile includes two first segments respectively located on opposite left and right sides of the back plate, two second segments connected to the two first segments in a one-to-one correspondence, and a third segment located at the lower part of the back plate and connected to the two second segments respectively; wherein, the two first segments are arranged at an angle to the second profile, the spacing between the top ends of the two first segments is smaller than the spacing between the bottom ends of the two first segments, and the top ends of the two first segments respectively extend obliquely upward to the opposite left and right sides of the bellows of the range hood.

[0018] In one embodiment, the bottom ends of the two first segments are respectively located above the plane where the clamping positions on the left and right opposite sides of the first condensation plate on the front panel of the smoke hood are located; the distance between the opposite ends of each first segment in a direction perpendicular to the bottom edge of the back panel is h1, and the distance between the bottom edge and the top edge of the back panel is h2, and h1≤0.5h2.

[0019] In one embodiment, the inner wall surface of the back plate is used to abut against the top of the second condensation plate at the lower air inlet of the smoke hood, all of the first pressure profiles are located above the top of the second condensation plate, and the third section is located below the top of the second condensation plate.

[0020] In one of the embodiments, at least one fourth profile is respectively provided at two corners on the left and right opposite sides of the back plate.

[0021] The above second technical problem is solved by the following technical solution:

[0022] A smoke collecting hood comprises a back plate of the smoke collecting hood.

[0023] The smoke hood described in this application has the following beneficial effects compared with the background technology:

[0024] In the above-mentioned smoke hood, the vibration energy generated by the fan when working is transmitted to the vibration receiving part. The back plate is provided with a plurality of radially dispersed first pressure profiles, which can effectively transmit the vibration energy radially to the periphery of the back plate while improving strength and reducing vibration. Since the periphery of the back plate is connected to other panels of the smoke hood on the smoke hood, the periphery of the back plate is relatively strong, so that the vibration energy transmitted to the periphery of the back plate can be effectively consumed, so as to further reduce the low-frequency vibration of the whole machine.

[0025] The third technical problem mentioned above is solved by the following technical solution:

[0026] A range hood comprises the fume collecting hood.

[0027] The range hood described in this application has the following beneficial effects compared with the background technology:

[0028] In the above-mentioned range hood, the vibration energy generated by the fan when working is transmitted to the vibration receiving part. The back plate is provided with a plurality of first pressure profiles dispersed in a radial manner, so that the vibration energy can be effectively dispersed and transmitted radially to the periphery of the back plate while improving strength and reducing vibration. Since the periphery of the back plate is connected to other panels of the smoke hood on the smoke hood, the periphery of the back plate is relatively strong, so that the vibration energy transmitted to the periphery of the back plate can be effectively consumed, so as to further reduce the low-frequency vibration of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a structural diagram of a range hood according to an embodiment of the present application.

[0032] Figure 2 for Figure 1 Diagram of the internal structure of the structure shown.

[0033] Figure 3 for Figure 1 Cross-sectional view of the structure at AA.

[0034] Figure 4 for Figure 3 Enlarged structural diagram at B.

[0035] Figure 5 for Figure 1 Structural diagram of the backplane in the structure.

[0036] Figure 6 for Figure 5 Cross-sectional structural diagram at CC.

[0037] Figure 7 This is a structural diagram of a range hood according to another embodiment of the present application.

[0038] Figure 8 for Figure 7 Exploded structure diagram of a range hood of the structure shown.

[0039] Reference numerals:

[0040] 10. Smoke hood; 11. Back panel; 111. Vibration receiving part; 112. First profile; 113. Guide groove; 114. Second profile; 115. Third profile; 1151. First section; 1152. Second section; 1153. Third section; 116. Fourth profile; 117. Front panel; 118. Lower air inlet; 12. Buffer; 20. Bellows; 21. Back panel; 30. Fan; 40. Guide plate; 50. First condensation plate; 51. Snap-in position; 60. Second condensation plate. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0042] See also Figure 1 and Figure 2 Or see Figure 7 and Figure 8 , Figure 1 and Figure 2 The structure of a range hood, for example, a 7-shaped range hood, is shown. Figure 7 and Figure 8 The structure diagram of the range hood being a side-suction range hood is shown schematically. The range hood provided in one embodiment of the present application includes but is not limited to a 7-shaped range hood or a side-suction range hood, and includes a fume hood 10. The fume hood 10 includes a back plate, that is, a wall plate on the fume hood 10 facing the cavity wall after being normally installed in the kitchen. Specifically, the back plate 11 of the fume hood 10 is provided with a vibration receiving portion 111 for receiving the vibration of the fan 30 and a plurality of first pressed profiles 112 extending radially from the vibration receiving portion 111 toward the periphery of the back plate 11.

[0043] It should be noted that the vibration receiving part 111 refers to the part on the back plate 11 that is closer to the fan 30. In this way, when the fan 30 is in use, the vibration receiving part 111 first receives the vibration of the fan 30. After receiving the vibration, the vibration receiving part 111 transfers the vibration energy to other parts on the back plate 11.

[0044] It should be noted that the radially extending arrangement in this embodiment means that all the first profiles 112 are relatively concentratedly arranged on the back plate 11 close to one end of the vibration receiving part 111, and the other ends of all the first profiles 112 are relatively dispersedly arranged on the back plate 11. In addition, the shape and design size of each first profile 112 are independently and flexibly set and adjusted according to actual needs, which can be completely the same or different from each other, and are not limited here. Among them, the contour shape of the projection of each first profile 112 on the surface of the back plate 11 along the front and rear direction of the back plate 11 includes but is not limited to various regular shapes such as triangles and trapezoids and other irregular shapes. In addition, the periphery of the back plate 11 refers to the part of the back plate 11 away from its central part, that is, the part close to the outer peripheral contour of the back plate 11, including but not limited to the bottom, top, left and right opposite sides, four corners of the back plate 11, etc., which can be flexibly adjusted and set according to actual needs, and are not specifically limited here.

[0045] In some embodiments, the fan 30 can be directly connected to the vibration receiving part 111, especially as Figure 7 and Figure 8 The side suction range hood shown in the figure has a connection portion arranged at the middle part of the back plate 11, and the fan 30 is arranged inside the smoke collecting hood 10 and is directly connected to the vibration receiving portion 111 or can also be indirectly connected to the vibration receiving portion 111 through a mounting frame, that is, the vibration energy generated by the fan 30 when working is directly transmitted to the vibration receiving portion 111 or indirectly transmitted to the vibration receiving portion 111 through the mounting frame; it can also be indirectly connected to the vibration receiving portion 111, especially, for example, Figure 1 and Figure 2 In the 7-shaped range hood shown, the vibration receiving part 111 is arranged on the top of the back plate 11, and the fan 30 is installed in the bellows 20 through a mounting frame. The vibration receiving part 111 is connected to the back panel 21 of the bellows 20 and is thereby indirectly connected to the fan 30. When the fan 30 is working, the vibration energy is transmitted to the bellows 20 through the mounting frame, and the vibration energy is transmitted to the vibration receiving part 111 by the back panel 21 of the bellows 20; or the vibration receiving part 111 is connected to the top panel of the smoke hood, and the top panel is connected to the bellows 20, and is thereby indirectly connected to the fan 30. When the fan 30 is working, the vibration energy is transmitted to the bellows 20 through the mounting frame, and the bellows 20 transmits the vibration energy downward to the top panel, and then transmits it to the vibration receiving part 111 by the top panel.

[0046] The back plate of the smoke hood 10, when the fan 30 is working, transmits the vibration energy generated to the vibration receiving part 111. The back plate 11 is provided with a plurality of radially dispersed first profiles 112, which can effectively transmit the vibration energy radially to the periphery of the back plate 11 while improving the strength and reducing the vibration. The vibration energy transmission path of the back plate is as follows: Figure 2Since the periphery of the back plate 11 is connected to other panels of the smoke hood 10 on the smoke hood 10, the periphery of the back plate 11 is relatively strong, so that the vibration energy transmitted to the periphery of the back plate 11 can be effectively consumed to further reduce the low-frequency vibration of the whole machine.

[0047] In addition, when the range hood is installed, the back panel is in contact with the wall through at least one buffer 12. When the vibration energy is transmitted to the periphery of the back panel, the buffer 12 can reduce shock and further absorb the vibration energy, thereby effectively reducing the low-frequency vibration noise generated by the local resonance of the back panel.

[0048] Among them, the buffer member 12 includes but is not limited to an elastic member, and can be set to various structural forms such as blocks, gaskets, etc., such as silicone pads, rubber pads, foam, springs, etc., as long as it can play a shock-absorbing and buffering role, it is not specifically limited here and can be selected according to actual needs.

[0049] Among them, the back panel in this embodiment includes but is not limited to a sheet metal part, and each first pressing profile 112 is obtained by synchronously processing during the sheet metal processing and manufacturing process, so that batch production can be achieved, and the production efficiency and production quality are relatively high.

[0050] In some embodiments, the pressing directions of each first pressing profile 112 are independently set. The outer wall surface of the back plate 11 can be recessed toward the internal environment of the smoke hood 10, or the inner wall surface of the back plate 11 can be recessed toward the outside of the smoke hood 10. The specific direction can be flexibly adjusted and set according to actual needs and is not limited here.

[0051] See also Figure 1 and Figure 2 Or see Figure 7 and Figure 8 In a specific embodiment, all the first profiles 112 are concavely arranged on the outer wall of the back plate 11 in the direction of the internal environment of the smoke hood 10. In this way, a convex portion corresponding to the first profile 112 is formed on the inner wall of the back plate 11, and any two adjacent convex portions cooperate to form a guide groove 113. Since all the first profiles 112 are radial, all the guide grooves 113 are also radially extended and arranged, which can play a guiding role, so that the intake airflow of the air inlet can be smoothly introduced into the air supply fan 30 when passing through the back plate 11.

[0052] Specifically, see Figure 1 and Figure 2For the 7-shaped range hood, the 7-shaped range hood is provided with a lower air inlet 118, and all the guide grooves 113 can smoothly guide the airflow of the lower air inlet 118 into the interior of the bellows 20, thereby avoiding the vortex phenomenon and improving the flow efficiency of the airflow. The airflow entering the bellows 20 is discharged outward under the power provided by the fan 30; please refer to Figure 7 and Figure 8 For the side-suction range hood, all the guide grooves 113 can enable the airflow from the air inlet to be smoothly introduced into the vibration receiving part 111, and then enter the inside of the fan 30 after converging at the vibration receiving part 111, and be discharged outward under the power of the fan 30, which can avoid the occurrence of vortex phenomenon and improve the flow efficiency of the airflow.

[0053] In a specific embodiment, see Figure 1 and Figure 2 For the 7-shaped range hood, the vibration receiving part 111 is located at the top of the back plate 11, and the vibration receiving part 111 is connected to the back plate 21 of the bellows 20 and is indirectly connected to the fan 30. All the first profiles 112 are radially extended from the top of the back plate 11 toward the bottom of the back plate 11, and the bottom of the back plate 11 is connected to the wall through a buffer 12 on both sides. The vibration energy generated by the fan 30 is transmitted to the vibration receiving part 111 through the back plate 21 of the bellows 20, and then the vibration energy is dispersed and transmitted to the bottom of the back plate 11 by each first profile 112, and is shock-absorbing through the buffers 12 on both sides of the bottom of the back plate 11, thereby effectively avoiding the resonance of the middle part of the back plate to generate low-frequency vibration noise.

[0054] In a specific embodiment, see Figure 7 and Figure 8 For the side suction range hood, the vibration receiving part 111 is located in the middle of the back plate 11, and all the first pressure profiles 112 are radially extended from the middle of the back plate 11 toward the periphery of the back plate 11, and multiple different parts of the periphery of the back plate 11 are connected to the wall through multiple buffers 12. Specifically, a buffer 12 is provided at each of the four corners of the back plate 11. The vibration energy generated by the fan 30 is directly transmitted to the vibration receiving part 111, and then the vibration energy is dispersed and transmitted to the periphery of the back plate 11 by each first pressure profile 112, and the multiple buffers 12 around the back plate 11 are used for shock absorption, thereby effectively avoiding the resonance of the middle part of the back plate to generate low-frequency vibration noise.

[0055] In one embodiment, when the vibration receiving portion 111 is located at the top of the back plate 11, for example, Figure 1 and Figure 2In the 7-shaped range hood shown, the number of the first profiles 112 is 3 to 15, specifically, for example, 3, 6, 7, 8, 10 or 15. In this way, the number of the first profiles 112 is appropriate, the flow guiding effect is obvious, the vibration reduction effect is good, and the processing cost is low. That is, it can avoid the flow guiding effect and vibration reduction effect being not obvious when the number of the first profiles 112 is too small, and avoid the processing cost being increased when the number of the first profiles 112 is too large.

[0056] In one embodiment, when the vibration receiving portion 111 is located in the middle of the back plate 11, for example, Figure 7 and Figure 8 In the side suction range hood shown, the number of the first profiles 112 is 8 to 40. In this way, the number of the first profiles 112 is appropriate, the flow guiding effect is obvious, the vibration reduction effect is good, and the processing cost is low. That is, it can avoid the situation that the flow guiding effect and the vibration reduction effect are not obvious when the number of the first profiles 112 is too small, and it can avoid the situation that the processing cost and the processing difficulty increase when the number of the first profiles 112 is too large.

[0057] See also Figure 1 and Figure 2 or Figure 7 and Figure 8 In one embodiment, a second profile 114 is provided on the back plate 11. The second profile 114 is located between the vibration receiving portion 111 and all the first profiles 112, so as to separate the vibration receiving portion 111 from all the first profiles 112. In other words, the vibration receiving portion 111 is located on one side of the second profile 114, and all the first profiles 112 are located on the other side of the second profile 114. In this way, the second profile 114 can increase the rigidity of the local position of the back plate 11 and weaken the vibration intensity, so that before the vibration receiving portion 111 transmits the vibration energy to each first profile 112, it is first separated by the second profile 114, and part of the vibration energy of the vibration receiving portion 111 can be separated, and then the remaining part of the vibration energy of the vibration receiving portion 111 is dispersed to the periphery of the back plate 11 through all the first profiles 112, so that the resonance of the middle part of the back plate to generate low-frequency vibration noise can be effectively avoided.

[0058] In addition, specifically, for Figure 1 and Figure 2 For the 7-shaped range hood shown, the second profile 114 is, for example, extended along the top edge of the back plate 11. Figure 3 and Figure 4The second press profile 114 can also be used as a predetermined position during the installation of the back plate 11 and the back panel 21 of the bellows 20, which facilitates the installation operation; the back plate is relatively long, and thin-walled sheet metal parts are prone to deformation and arching in the middle of a long distance. The top of the back plate 11 is provided with a second press profile 114, for example, in a cylindrical shape, which can effectively increase the flatness of the back plate, so that the back plate of the smoke hood 10 and the back panel 21 of the bellows 20 fit closely, avoiding the existence of assembly gaps that cause whistling noises.

[0059] In addition, for Figure 7 and Figure 8 For the side suction range hood shown, the second pressure profile 114 is arranged around the circumference of the vibration receiving portion 111. Similar to the 7-shaped range hood, the second pressure profile 114 can also be used as a predetermined position during the installation of the back plate 11 and the fan 30 to facilitate the installation operation.

[0060] In some embodiments, the cross-sectional profiles of the first press profile 112 and the second press profile 114 along the extension direction are independently set, including but not limited to regular shapes such as semicircular, semi-elliptical, polygonal, and other irregular shapes.

[0061] In some embodiments, see Figure 5 and Figure 6 The depth d1 of the first pressure profile 112 includes but is not limited to 1.5 mm to 3 mm, and specifically includes values ​​such as 1.5 mm, 2 mm, 2.5 mm, and 3 mm. The depth d1 is of appropriate size. On the one hand, the depth d1 is large enough to have good shock absorption and flow guidance effects; on the other hand, the depth d1 is not too large, so as to avoid increased processing difficulty and distortion and deformation defects of the back plate caused by excessive depth d1.

[0062] See also Figure 5 and Figure 6 In some embodiments, the depth d2 of the second pressure profile 114 includes but is not limited to 3 mm to 6 mm, specifically 3 mm, 4 mm, 5 mm, 6 mm and the like. The depth d2 is of appropriate size. On the one hand, the depth d2 is large enough to effectively increase the stiffness of the connection between the fan 30 and the vibration receiving part 111 and reduce the vibration intensity. On the other hand, the depth d2 is not too large, so as to avoid increased processing difficulty caused by excessive depth d2.

[0063] See also Figure 1 and Figure 2 In one embodiment, when the second profile 114 is extended along the top edge of the back plate 11, a third profile 115 is further provided on the periphery of the back plate 11. The third profile 115 is connected to the second profile 114 at opposite ends to form an annular profile, and all the first profiles 112 are located in the inner area of ​​the annular profile. In this way, the third profile 115 can further increase the structural strength of the periphery of the back plate 11.

[0064] See also Figure 1 and Figure 2 In some embodiments, the third profile 115 includes two first segments 1151 located at the left and right opposite sides of the back plate 11, two second segments 1152 connected to the two first segments 1151 in a one-to-one correspondence, and a third segment 1153 located at the lower part of the back plate 11 and connected to the two second segments 1152. The two first segments 1151 are arranged at an angle with the second profile 114, the distance between the top ends of the two first segments 1151 is smaller than the distance between the bottom ends of the two first segments 1151, and the top ends of the two first segments 1151 extend upwardly to the left and right opposite sides of the wind box 20, respectively. In this way, when installing two guide plates 40 for guiding the airflow of the lower air inlet to the inside of the wind box 20 inside the smoke hood 10, the two first segments 1151 respectively play a role in positioning and limiting the two guide plates 40, and the first segments 1151 can also increase the structural strength of the two opposite sides of the back plate 11.

[0065] In addition, in the present embodiment, a first condensation plate 50 is provided on the front panel 117 of the smoke hood 10, and the first condensation plate 50 is mounted on the front panel 117 by a snap-fit ​​method on the left and right opposite sides. Accordingly, the bottom ends of the two first segments 1151 are respectively located above the plane where the snap-fit ​​positions on the left and right opposite sides of the first condensation plate 50 are located, so as to avoid interference between the guide plate 40 and the snap-fit ​​positions of the first condensation plate 50, so that the two guide plates 40 can be smoothly installed inside the smoke hood 10. In addition, the distance between the opposite ends of each first segment 1151 in the direction perpendicular to the bottom edge of the back plate 11 is h1, and the distance between the bottom edge and the top edge of the back plate 11 is h2, and h1≤0.5h2. In this way, the bottom ends of the two first segments 1151 can be respectively located above the plane where the snap-fit ​​positions on the left and right opposite sides of the first condensation plate 50 are located.

[0066] See also Figure 1 , Figure 3 and Figure 5 In some embodiments, the front panel 117 of the smoke hood 10 is formed with a lower air inlet 118, and a second condensation plate 60 is provided at the lower air inlet 118. The top of the second condensation plate 60 abuts against the inner wall of the back plate 11, is higher than the third segment 1153, and is located below all the first profiles 112. In this way, after the airflow entering the lower air inlet is introduced into the interior of the smoke hood 10 through the second condensation plate 60, it will smoothly enter the guide grooves 113 formed by two adjacent first profiles 112, and after converging through each guide groove 113, enter the interior of the fan 30, and be discharged outward under the power of the fan 30.

[0067] See also Figure 1 and Figure 2Furthermore, at least one fourth profile 116 is respectively provided at two corners on the left and right sides of the back plate 11. The corner is the part of the back plate 11 where the first segment 1151 is away from the first profile 112. The fourth profile 116 can increase the structural strength of the corner, reduce vibration energy, and thus reduce noise.

[0068] In one embodiment, a smoke collecting hood 10 includes a back plate of the smoke collecting hood 10 in any of the above embodiments.

[0069] In the smoke collecting hood 10, the vibration energy generated by the fan 30 when working is transmitted to the vibration receiving part 111. The back plate 11 is provided with a plurality of radially dispersed first profiles 112, which can effectively transmit the vibration energy radially to the periphery of the back plate 11 while improving the strength and reducing the vibration. The vibration energy transmission path of the back plate is as follows: Figure 2 Since the periphery of the back plate 11 is connected to other panels of the smoke hood 10 on the smoke hood 10, the periphery of the back plate 11 is relatively strong, so that the vibration energy transmitted to the periphery of the back plate 11 can be effectively consumed to further reduce the low-frequency vibration of the whole machine.

[0070] In one embodiment, a range hood, including but not limited to a 7-shaped range hood or a side-suction range hood, comprises the fume hood 10 of any of the above embodiments.

[0071] In the above-mentioned range hood, the vibration energy generated by the fan 30 when working is transmitted to the vibration receiving part 111. The back plate 11 is provided with a plurality of radially dispersed first pressed parts 112, so that the vibration energy can be effectively transmitted radially to the periphery of the back plate 11 while improving the strength and reducing the vibration. The vibration energy transmission path of the back plate is as follows: Figure 2 Since the periphery of the back plate 11 is connected to other panels of the smoke hood 10 on the smoke hood 10, the periphery of the back plate 11 is relatively strong, so that the vibration energy transmitted to the periphery of the back plate 11 can be effectively consumed to further reduce the low-frequency vibration of the whole machine.

[0072] The following table is obtained based on the relevant data of the range hood in the prior art and the range hood of this embodiment under different working conditions:

[0073]

[0074] The following conclusions can be drawn from the above table: compared with the range hood in the prior art, the semi-anechoic chamber noise and working noise of the improved range hood are reduced, whether in stir-fry gear or high-end gear, and the reduction is more than 0.28dB. It can be seen that the improved range hood can effectively reduce low-frequency noise.

[0075] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0076] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0077] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0078] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0079] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0080] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A back plate of a smoke hood, characterized in that: The back plate (11) of the smoke collecting hood (10) is provided with a vibration receiving portion (111) for receiving the vibration of the fan (30), and a plurality of first pressure profiles (112) radially extending from the vibration receiving portion (111) toward the periphery of the back plate (11).

2. The back plate of the smoke hood according to claim 1, characterized in that: All of the first pressed shapes (112) are formed by recessing the outer wall surface of the back plate (11) in a direction toward the interior of the smoke collecting hood (10).

3. The back plate of the smoke hood according to claim 1, characterized in that: The vibration receiving portion (111) is located at the top of the back plate (11), and all the first pressure profiles (112) are arranged to extend radially from the top of the back plate (11) toward the bottom of the back plate (11); Alternatively, the vibration receiving portion (111) is located in the middle of the back plate (11), and all of the first pressure profiles (112) are arranged to extend radially from the middle of the back plate (11) toward the periphery of the back plate (11).

4. The back plate of the smoke hood according to claim 3, characterized in that: When the vibration receiving portion (111) is located at the top of the back plate (11), the number of the first pressure profiles (112) is 3 to 15; When the vibration receiving portion (111) is located in the middle portion of the back plate (11), the number of the first pressure profiles (112) is 8 to 40.

5. The back plate of the smoke hood according to claim 1, characterized in that: A second pressure profile (114) is provided on the back plate (11), and the second pressure profile (114) is located between the vibration receiving portion (111) and all of the first pressure profiles (112) so as to separate the vibration receiving portion (111) from all of the first pressure profiles (112).

6. The back plate of the smoke hood according to claim 5, characterized in that: The depth d1 of the first pressure profile (112) is 1.5 mm to 3 mm; the depth d2 of the second pressure profile (114) is 3 mm to 6 mm.

7. The back plate of the smoke hood according to claim 5, characterized in that: The vibration receiving portion (111) is located at the top of the back plate (11), and the second pressure profile (114) is extended along the top edge of the back plate (11); Alternatively, the vibration receiving portion (111) is located in the middle of the back plate (11), and the second pressure profile (114) is arranged around the circumference of the vibration receiving portion (111).

8. The back plate of the smoke hood according to claim 7, characterized in that: When the second pressure profile (114) is extended along the top edge of the back plate (11), a third pressure profile (115) is also provided on the periphery of the back plate (11); the opposite ends of the third pressure profile (115) are respectively connected to the second pressure profile (114) to form an annular pressure profile, and the entire first pressure profile (112) is located in the inner area of ​​the annular pressure profile.

9. The back plate of the smoke hood according to claim 8, characterized in that: The third profile (115) comprises two first segments (1151) respectively located on opposite left and right sides of the back plate (11), two second segments (1152) connected to the two first segments (1151) in a one-to-one correspondence, and a third segment (1153) located at the lower part of the back plate (11) and connected to the two second segments (1152) respectively; wherein the two first segments (1151) are arranged at an angle to the second profile (114), the distance between the top ends of the two first segments (1151) is smaller than the distance between the bottom ends of the two first segments (1151), and the top ends of the two first segments (1151) respectively extend upwardly in an inclined manner to the opposite left and right sides of the air box (20) of the range hood.

10. The back plate of the smoke hood according to claim 9, characterized in that: The bottom ends of the two first sections (1151) are respectively located above the plane where the clamping positions (51) on the left and right opposite sides of the first condensation plate (50) on the front panel (117) of the smoke hood (10) are located; the distance between the opposite ends of each first section (1151) in a direction perpendicular to the bottom edge of the back plate (11) is h1, and the distance between the bottom edge and the top edge of the back plate (11) is h2, and h1≤0.5h2.

11. The back plate of the smoke hood according to claim 9, characterized in that: The inner wall surface of the back plate (11) is used to abut against the top of the second condensation plate (60) at the lower air inlet (118) of the smoke hood (10), all of the first profiles (112) are located above the top of the second condensation plate (60), and the third section (1153) is located below the top of the second condensation plate (60).

12. The back plate of the smoke hood according to claim 9, characterized in that: At least one fourth pressed profile (116) is respectively provided at two corners on opposite left and right sides of the back plate (11).

13. A smoke collecting hood, characterized in that: The smoke collecting hood (10) comprises a back plate of the smoke collecting hood (10) according to any one of claims 1 to 12.

14. A range hood, characterized in that: The range hood comprises the fume hood (10) as claimed in claim 13.

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