Silent range hood

Abstract

The utility model discloses a silent range hood which comprises an air cabinet, an exhaust fan is arranged in the air cabinet, an exhaust hood is arranged below the air cabinet, and an air inlet is formed in the front portion of the exhaust hood. The upper end of the ventilation pipe is communicated with the lower end of the air cabinet, the lower end of the ventilation pipe is communicated with the top of the draught hood, a front plate is arranged on the front portion of the ventilation pipe, a rear plate is arranged on the rear portion of the ventilation pipe, and side plates are arranged on the left side and the right side of the ventilation pipe respectively. And the rear end of the air guide inclined plate part is tangentially connected with the upper end of the rear concave arc plate part. According to the range hood, the noise generated when the range hood works can be reduced, and the oil net of the range hood is convenient to assemble and disassemble.

Description

Technical Field

[0001] This utility model relates to the field of range hoods, specifically to a silent range hood. Background Technology

[0002] Currently, side-draft range hoods have an upper air chamber containing an exhaust fan, and an exhaust vent at the bottom facing forward and downward. This allows the exhaust fumes from food in the cookware on the stove located directly below and in front of the vent to be drawn away. To enhance fume extraction, the exhaust fan has a larger airflow, and its impeller and motor rotate at higher speeds, resulting in greater noise. Because the exhaust vent is close to the exhaust fan, the noise easily travels outwards through it. This noise significantly impacts users cooking in front of the range hood, necessitating improvements to existing range hood technology. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a silent range hood that helps reduce the noise emitted when the range hood is working.

[0004] The objective of this utility model is achieved through the following technical solution.

[0005] The silent range hood disclosed in this utility model includes a fan cabinet, which houses an exhaust fan. An exhaust hood is located below the fan cabinet, and an air inlet is located at the front of the exhaust hood. It also includes a ventilation pipe, the upper end of which is connected to the lower end of the fan cabinet, and the lower end of which is connected to the top of the exhaust hood. A front plate is located at the front of the ventilation pipe, and a rear plate is located at the rear of the ventilation pipe. Side plates are located on the left and right sides of the ventilation pipe. The front plate includes a concave arc plate and a guide plate, with the guide plate being higher at the front and lower at the rear. The rear end of the guide plate is tangentially connected to the upper end of the concave arc plate.

[0006] Preferably, the air inlet is positioned facing forward and downward, the exhaust fan is a centrifugal fan with an impeller, the impeller's rotation axis is positioned along the front-to-back direction, the impeller is located inside the rear of the air handling unit, and the air guide plate is located below the corresponding part of the front of the air handling unit.

[0007] Preferably, the rear plate is aligned with the rear wall of the blower, and the side plates are aligned with the left and right side walls of the blower, respectively.

[0008] Preferably, the left and right ends of the exhaust hood protrude outward from the ventilation pipe.

[0009] Preferably, the air inlet is provided with an oil screen, and two wind deflectors are slidably connected to the front side of the oil screen.

[0010] Preferably, the upper and lower ends of the oil mesh are respectively formed with grooves, the upper and lower ends of the wind baffle are respectively disposed in the corresponding grooves, and the oil mesh has a rear concave portion formed in the middle of the vertical direction, and the rear concave portion has mesh holes.

[0011] Preferably, one end of the wind deflector in the left-right direction is bent forward to form a handle.

[0012] Preferably, the range hood of this utility model further includes a fastening assembly, which includes a fork and an insert. The fork forms a fork opening, and the insert is wider at the front and narrower at the back. The insert is disposed within the fork opening. A retaining ball and a spring are respectively provided on both sides of the fork opening. The retaining ball is connected to the insert by the elastic restoring force of the corresponding spring. The exhaust hood forms a slot, and the lower end of the oil filter is disposed within the slot. The fork is installed on the upper rear side of the oil filter, and the insert is fixed to the exhaust hood.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting the upper end of the ventilation pipe to connect to the lower end of the air handling unit, and the lower end of the ventilation pipe to connect to the top of the exhaust hood, the front part of the ventilation pipe is provided with a front plate, the rear part of the ventilation pipe is provided with a rear plate, and the left and right sides of the ventilation pipe are respectively provided with side plates. The front plate includes a concave arc plate and a guide plate. The guide plate is set with the front higher and the rear lower. The rear end of the guide plate is tangentially connected to the upper end of the concave arc plate, which helps to reduce the noise emitted by the range hood when it is working. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the range hood of this utility model.

[0015] Figure 2 This is a cross-sectional view of the range hood of this utility model from the right side.

[0016] Figure 3 This is a cross-sectional view of the ventilation duct of this utility model from the right-hand side.

[0017] Figure 4 This is a simplified left-side view of the front panel of the ventilation duct of this utility model.

[0018] Figure 5 This is a partial cross-sectional structural diagram of the range hood of this utility model.

[0019] Figure 6 This is a three-dimensional structural diagram of the oil mesh of this utility model.

[0020] Figure 7 This is a three-dimensional structural diagram of the wind deflector of this utility model.

[0021] Figure 8 This is a bottom-view three-dimensional structural diagram of the exhaust hood of this utility model.

[0022] Figure 9 This is a three-dimensional structural diagram of the fastening assembly of this utility model.

[0023] Figure 10 This is a top view of the cross-sectional structure of the fastening assembly of this utility model.

[0024] Labeling: 1. Air cabinet; 101. Exhaust vent; 2. Air inlet; 201. Oil screen; 21. Rear recess; 20. Mesh 2001; Slide groove; 211. Mounting plate; 203. Slot; 204. Fastening assembly; 22. Fork; 221. Fork opening; 2210. Buckle; 2211. Spring; 2212. Plug; 2213. Insert; 222. Ventilation duct; 30. Waist position; 31. Front plate; 311. Rear concave arc plate; 312. Air guide plate; 32. Side plate; 33. Rear plate; 4. Baffle plate; 41. Handle plate; 5. Exhaust fan; 51. Impeller; 511. Fan inlet; 52. Volute. Detailed Implementation

[0025] The present invention will now be further described with reference to the accompanying drawings.

[0026] The silent range hood of this utility model, such as Figure 1 and Figure 2 As shown, the device includes a blower unit 1, an exhaust fan 5 inside the blower unit 1, an exhaust hood 2 below the blower unit 1, and an air inlet 201 at the front of the exhaust hood 2. The silent range hood of this invention also includes a ventilation pipe 3. The upper end of the ventilation pipe 3 is connected to the lower end of the blower unit 1, and the lower end of the ventilation pipe 3 is connected to the top of the exhaust hood 2. The front of the ventilation pipe 3 has a front plate 31, the rear of the ventilation pipe 3 has a rear plate 33, and side plates 32 are provided on the left and right sides of the ventilation pipe 3. In other words, the front plate 31, the rear plate 33, and the side plates 32 form the ventilation duct structure of the ventilation pipe 33. Figure 3 As shown, the front plate 31 includes a concave arc plate portion 311 and an air guide inclined plate portion 312. The air guide inclined plate portion 312 is arranged with the front higher than the rear. The rear end of the air guide inclined plate portion 312 is tangentially connected to the upper end of the concave arc plate portion 311. In other words, the concave arc plate portion 311 is concave to the rear, and the air guide inclined plate portion 312 is equivalent to the upper end of the concave arc plate portion 311 extending forward and upward.

[0027] like Figure 2 As shown, when the exhaust fan 5 is running, the oily fumes generated by the food in the cookware flow upwards and backwards into the air inlet 201, then into the exhaust hood 2, and then upwards through the ventilation pipe 3 to reach the inside of the air cabinet 1. Finally, the exhaust fan 5 discharges the oily fumes outwards. Figure 2As shown, since the upper end of the ventilation duct 3 is connected to the lower end of the air handling unit 1, and the air guide plate 312 is set with the front higher than the rear, the rear end of the air guide plate 312 is tangentially connected to the upper end of the concave arc plate 311, as shown... Figure 3 As shown, when the noise generated by the operation of the exhaust fan 5 propagates downwards, as... Figure 3 As shown by the dotted arrows, some noise is reflected by the upper part of the front panel 31 and the upper part of the rear concave arc plate 311, causing the noise waves to attenuate after multiple reflections within the range hood. This results in relatively less noise directly transmitting through the air to the air inlet 201, thus reducing the noise emitted by the range hood during operation and minimizing noise interference for the user, thereby improving the user experience. Because the rear concave arc plate 311 is concave, as... Figure 3 As shown, the ventilation duct 3 can thus be designed to be wider at both ends and narrower in the middle, ensuring that the lower end of the ventilation duct 3 still has a large ventilation cross-sectional area. This facilitates the flow of air from the exhaust hood 2 into the lower end of the ventilation duct 3. Since the front panel 31 has a gently sloping arc design, it helps to guide the oil fume airflow smoothly, avoiding significant increases in wind resistance and turbulence that could lead to increased wind noise. This, in turn, helps to reduce the noise emitted by the range hood during operation. Figure 2 and Figure 3 As shown, by setting the air guide ramp 312, the upper end of the ventilation duct 3 can be connected to the width of the air handling unit 1 relatively smoothly (within...). Figure 2 (From a visual perspective) the larger lower end. For example... Figure 2 As shown, by connecting the air handling unit 1 to the exhaust hood 2 via the ventilation pipe 3, it is possible to lower the height of the exhaust hood 2 while the air handling unit 1 can still be embedded or hidden in the kitchen cabinet. Since the height of the air inlet 201 is appropriately lowered, the air inlet 201 is farther away from the user's ears, so the noise transmitted through the air inlet 201 is lighter when it reaches the human ear.

[0028] like Figure 4 As shown, with the lower rear end of ventilation duct 3 as the origin O, forward is the X-axis, upward is the Y-axis, and point D is the coordinate on the front plate 31. The specific shape of the front plate 31 is ( Figure 4 The distance from midpoint A to point B can be described by the following series of coordinates (X, Y) of point D: (110,0); (104,20); (98,40); (94,60); (90,80); (87.4,100); (86.2,120); (84.7,140); (85,160); (88,180); (95,200); (105,220); (120,240); (148,260); (245,280).

[0029] Furthermore, such as Figure 2 and Figure 5As shown, the air inlet 201 is positioned facing downwards and forwards, meaning that the upper edge of the air inlet 201 is in front of the lower edge of the air inlet 201, and the cookware is located below and in front of the air inlet 201. This facilitates the air inlet 201 in easily drawing in the fumes produced by the food inside the cookware. Figure 2 and Figure 5 As shown, the exhaust fan 5 is a centrifugal fan. The exhaust fan 5 has an impeller 51 and a volute 52. The rotation axis of the impeller 51 is set along the front-to-back direction. The impeller 51 is located inside the volute 52. The front end of the volute 52 has a fan inlet 511, which is coaxial with the impeller 51. The impeller 51 is located at the rear interior of the air handling unit 1, meaning that the impeller 51 and the volute 52 are located rearward inside the air handling unit 1. Figure 2 As shown, the guide vane 312 is located below the front of the air handling unit 1, so the oil fume airflow output from the upper part of the ventilation duct 3 can pass above the guide vane 312, and then the oil fume airflow enters the front of the air handling unit 1. After that, the oil fume airflow enters the volute 52 through the fan inlet 511, as shown. Figure 1 As shown, the top of the air handling unit 1 is provided with an exhaust port 101, and the air outlet end of the volute 52 is connected to the exhaust port 101. By setting the above-mentioned air duct structure, it is beneficial to the orderly flow of oil fume air.

[0030] Furthermore, such as Figure 1 and Figure 2 As shown, the rear panel 33 is aligned with the rear wall of the air handling unit 1, and the side panels 32 are aligned with the left and right side walls of the air handling unit 1, respectively. More specifically, both the rear panel 33 and the side panels 32 are vertically installed. The side panel 32 located on the left is integrated with the left side wall of the air handling unit 1, and the side panel 32 located on the right is integrated with the right side wall of the air handling unit 1. Therefore, when the air handling unit 1 is installed against the kitchen wall, the ventilation duct 3 is also against the wall, thus allowing the ventilation duct 3 to be arranged further back, reducing the space occupied by the ventilation duct 3 in the kitchen. During the process of embedding the air handling unit 1 into the kitchen wall cabinet, the relative positions of the range hood and the wall cabinet in the vertical direction can be adjusted according to the actual situation of the kitchen. Since the side panels 32 are aligned with the left and right side walls of the air handling unit 1, interference between the ventilation duct 3 and the bottom opening of the wall cabinet is avoided. Figure 3 As shown, a waist position 30 is formed between the concave arc plate portion 311 and the rear plate 33. The waist position 30 is a narrow area of ​​the ventilation duct 3. By setting the waist position 30, it plays a role in blocking the downward transmission of noise. However, since the concave arc plate portion 311 is an arc transition, the obstruction effect of the waist position 30 on the airflow is not obvious.

[0031] Furthermore, such as Figure 1As shown, the left and right ends of the exhaust hood 2 protrude outward from the ventilation pipe 3, meaning that the width of the exhaust hood 2 is greater than the width of the ventilation pipe 3 in the left and right direction. Moreover, the ventilation pipe 3 is centrally located, which allows for a corresponding increase in the width of the air inlet 201, thus increasing the range of fume extraction.

[0032] Furthermore, such as Figure 1 , Figure 2 and Figure 5 As shown, the air inlet 201 is equipped with an oil filter 21, so the oily fumes flow through the oil filter 21 into the exhaust hood 2. Two baffles 4 are slidably connected to the front side of the oil filter 21. Therefore, when it is necessary to concentrate the fume extraction effect in the middle of the exhaust hood 2 in the left-right direction, such as... Figure 1 As shown, the two baffles 4 can be moved to the left and right ends of the exhaust hood 2 respectively. When it is necessary to distribute the fume extraction effect to the left and right ends of the exhaust hood 2, as shown... Figure 8 Therefore, the two wind deflectors 4 can be moved by hand to the corresponding position in the middle of the exhaust hood 2, so that the distribution of exhaust intensity can be flexibly adjusted.

[0033] Furthermore, such as Figure 6 As shown, grooves 211 are formed at the upper and lower ends of the oil mesh 21. The grooves 211 can be formed by folding the upper and lower ends of the oil mesh 21 body forward, as shown. Figure 5 and Figure 8 As shown, the upper and lower ends of the wind deflector 4 are respectively set in the corresponding sliding grooves 211. That is to say, the upper end of the wind deflector 4 is slidably set in the sliding groove 211 at the upper end of the oil screen 21, while the lower end of the wind deflector 4 is slidably set in the sliding groove 211 at the lower end of the oil screen 21. Figure 6 As shown, the oil mesh 21 has a recessed portion 20 formed in the middle of its vertical direction. The recessed portion 20 is formed by a bending process. Mesh holes 2001 are formed on the recessed portion 20. In other words, the oil fume airflow enters the exhaust hood 2 through the mesh holes 2001. Since the oil in the oil fume airflow will accumulate and adhere to the edge of the mesh holes 2001, and since the mesh holes 2001 are formed in the recessed portion 20, the baffle plate 4 will not scrape the oil stains on the recessed portion 20, which helps to keep the baffle plate 4 clean and prevents the oil stains on the recessed portion 20 from hindering the sliding adjustment of the baffle plate 4.

[0034] Furthermore, such as Figure 7 As shown, one end of the wind deflector 4 in the left-right direction is bent forward to form a handle piece 41, so the user can squeeze the handle piece 41 and slide the wind deflector 4 left and right. Moreover, the above structure is simple and easy to manufacture.

[0035] Furthermore, such as Figure 5 As shown, the range hood of this utility model also includes a fastening assembly 22, such as... Figure 9 and Figure 10As shown, the fastening assembly 22 includes a fork 221 and a insert 222. The fork 221 has a fork 2210, as shown in the figure. Figure 10 As shown, the insert 222 is wider at the front and narrower at the back, meaning that the width of the insert 222 gradually increases from back to front in the left-right direction. The insert 222 is located inside the fork 2210. A retaining ball 2211 and a spring 2212 are respectively provided on the left and right sides of the fork 2210. The retaining ball 2211 is connected to the insert 222 by the elastic restoring force of the corresponding spring 2212. That is, a retaining ball 2211 is connected to the left and right sides of the insert 222. The retaining ball 2211 can be a stainless steel ball or a plastic ball. The spring 2212 is located inside the fork 221. A screw plug 2213 is screwed onto the fork 221. In the left-right direction, the spring 2212 is positioned between the corresponding screw plug 2213 and the retaining ball 2211. Figure 5 As shown, the exhaust hood 2 has a slot 204, which may be formed at the lower edge of the air inlet 201. The lower end of the oil filter 21 is located in the slot 204. The fork 221 is installed on the upper rear side of the oil filter 21, and the insert 222 is fixed to the exhaust hood 2. Specifically, the fork 221 is installed on the rear side of the oil filter 21 by corresponding screws. The rear end of the insert 222 is integrally connected to a plate, which is installed on the front side of the mounting plate 203 by corresponding screws. The mounting plate 203 is the upper edge of the air inlet 201. During the installation of the oil filter 21, as follows... Figure 5 As shown, first insert the lower end of the oil mesh 21 into the slot 204, then swing the upper part of the oil mesh 21 backward so that the insert 222 is inserted into the fork 2210. Figure 10 As shown, during this process, the front end of the insert 222 pushes open the two spike balls 2211 on the left and right, while simultaneously causing the spring 2212 connected to the spike ball 2211 to elastically compress and deform. Since the insert 222 is wider at the front and narrower at the back, after the front end of the insert 222 passes the spike ball 2211, the spike ball 2211 is pressed against the side of the insert 222 by the elastic restoring force of the corresponding spring 2212, and the two spike balls 2211 on the left and right gradually move closer to each other, thereby causing the spike ball 2211 to engage with the insert. 222, positioning the oil mesh 21. The above installation process is simple and quick. When the oil mesh 21 needs to be disassembled for cleaning, first pull the upper part of the oil mesh 21 forward, so that the insert 222 is pulled out relatively backward. During this process, the hand needs to overcome the elastic restoring force of the spring 2212 to push the insert 222 out of the buckle ball 2211, so that the fork 221 is separated from the insert 222. Then, lift the oil mesh 21 slightly upward to disengage the lower end of the oil mesh 21 from the slot 204. The above disassembly of the oil mesh 21 is simple and quick.

Claims

1. A silent range hood, comprising a fan housing (1), wherein the fan housing (1) is provided with an exhaust fan (5), characterized in that: The air handling unit (1) is provided with an exhaust hood (2) at the bottom and an air inlet (201) at the front of the exhaust hood (2). It also includes a ventilation pipe (3), the upper end of which is connected to the lower end of the air handling unit (1) and the lower end of which is connected to the top of the exhaust hood (2). The ventilation pipe (3) is provided with a front plate (31) at the front and a rear plate (33) at the rear. The ventilation pipe (3) is provided with side plates (32) on the left and right sides respectively. The front plate (31) includes a concave arc plate (311) and a guide plate (312). The guide plate (312) is set with a high front and a low rear. The rear end of the guide plate (312) is tangentially connected to the upper end of the concave arc plate (311).

2. The silent range hood according to claim 1, characterized in that: The air inlet (201) is positioned facing forward and downward. The exhaust fan (5) is a centrifugal fan. The exhaust fan (5) is equipped with an impeller (51). The rotation axis of the impeller (51) is set along the front-back direction. The impeller (51) is located inside the rear of the air handling unit (1). The air guide plate (312) is located below the front of the air handling unit (1).

3. The silent range hood according to claim 1 or 2, characterized in that: The rear plate (33) is aligned with the rear wall of the blower (1), and the side plates (32) are aligned with the left and right side walls of the blower (1) respectively.

4. The silent range hood according to claim 3, characterized in that: The left and right ends of the exhaust hood (2) protrude outward from the ventilation pipe (3).

5. The silent range hood according to claim 4, characterized in that: The air inlet (201) is equipped with an oil screen (21), and two wind baffles (4) are slidably connected to the front side of the oil screen (21).

6. The silent range hood according to claim 5, characterized in that: The oil mesh (21) has grooves (211) formed at its upper and lower ends respectively. The wind deflector (4) is set in the corresponding grooves (211) at its upper and lower ends respectively. The oil mesh (21) has a recessed portion (20) formed in the middle of its upper and lower direction. Mesh holes (2001) are formed on the recessed portion (20).

7. The silent range hood according to claim 5, characterized in that: The wind deflector (4) has a handle piece (41) formed by bending one end forward in the left-right direction.

8. The silent range hood according to claim 5, characterized in that: It also includes a fastening assembly (22), which includes a fork (221) and a insert (222). The fork (221) forms a fork opening (2210). The insert (222) is wider at the front and narrower at the back. The insert (222) is located inside the fork opening (2210). The fork opening (2210) has a buckle ball (2211) and a spring (2212) on both sides respectively. The buckle ball (2211) is attached to the insert (222) by the elastic restoring force of the corresponding spring (2212). The exhaust hood (2) forms a slot (204). The lower end of the oil mesh (21) is located in the slot (204). The fork (221) is installed on the rear side of the upper part of the oil mesh (21). The insert (222) is fixed on the exhaust hood (2).

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