Range hood

Abstract

The utility model belongs to the technical field of range hoods, and particularly discloses a range hood. The range hood comprises a fan assembly, a smoke collecting shell and a flow guide and noise reduction assembly, a smoke inlet and a smoke outlet are formed in the smoke collecting shell, a smoke collecting cavity communicated with the smoke inlet and the smoke outlet is formed in the smoke collecting shell, and the smoke outlet is communicated with a smoke exhaust channel of the fan assembly; the flow guide and noise reduction assembly comprises a first noise reduction part and a second noise reduction part, the first noise reduction part and the second noise reduction part are arranged in the smoke collection cavity and located on the two sides of the smoke outlet correspondingly to form a flow guide channel, and the width of the flow guide channel is gradually reduced in the oil smoke flowing direction; the first noise reduction part and the second noise reduction part are asymmetrically arranged so as to be matched with the air inlet amount of the two sides of the smoke outlet, and the first noise reduction part and the second noise reduction part are each provided with a sound absorption noise reduction part. According to the range hood disclosed by the utility model, vortexes in the smoke collecting cavity can be reduced, vortex noise is reduced, the problem that flow guide and noise reduction requirements are different due to different air inlet amounts in different directions of a fan is solved, and the use experience of a user on the range hood is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a range hood. Background Art

[0002] A range hood is an appliance that is hung above the kitchen stove and uses the suction force generated by the fan to extract harmful substances such as grease, smoke and steam generated during cooking, and then filters them and discharges them to the outside. Range hoods have a variety of structural types, suitable for different kitchen environments and cooking needs. Among them, the 7-shaped top-side double-suction range hood is deeply loved by consumers because of its slim appearance that does not hit the head, and the main air inlet is sunken, closer to the smoke source, and has excellent smoke extraction effect.

[0003] The air inlet space of the 7-shaped top-side double-suction range hood is small, and the oil smoke is forcibly sucked in by the suction force of the fan, resulting in a loud sound of the oil smoke airflow. The noise will cause the body to shake and make the kitchen environment noisy. In addition, the smoke collection cavity outlet of the 7-shaped top-side double-suction range hood is small, and the oil smoke airflow will not flow smoothly when it enters the larger fan cabinet from the smoke collection cavity, forming vortices on the shoulders of the two sides of the body, such as the attached Figure 1 As shown; the vortex affects the smoke-intake effect of the fan, which in turn affects the air intake efficiency and generates broadband vortex noise; moreover, since the air intake volume of the fan in the entire circumference is different, the range and vortex noise of the vortex formed on both sides of the fuselage are also different, which will affect the uniformity of the smoke intake at the smoke inlet, and the difference in noise will also amplify the user's discomfort. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a range hood which can solve the problems that vortices are formed on the shoulders on both sides of the existing range hood body, affecting the air intake efficiency and generating broadband vortex noise, as well as the problems of poor smoke intake uniformity and strong user discomfort due to different vortex areas and broadband vortex noises caused by different air intake amounts at different directions of the fan.

[0005] The above technical problems are solved by the following technical solutions:

[0006] Provided is a range hood, comprising a fan assembly, wherein the fan assembly has a smoke exhaust passage, and the range hood further comprises:

[0007] A smoke collecting housing, wherein the smoke collecting housing is provided with a smoke inlet and a smoke outlet, wherein a smoke collecting cavity communicating with the smoke inlet and the smoke outlet is provided in the smoke collecting housing, and the smoke outlet is communicated with the smoke exhaust passage;

[0008] A flow guide and noise reduction component, the flow guide and noise reduction component includes a first noise reduction component and a second noise reduction component, the first noise reduction component and the second noise reduction component are arranged in the smoke collecting chamber and are respectively located on both sides of the smoke outlet to form a flow guide channel, and the width of the flow guide channel gradually decreases along the flow direction of the oil smoke; the first noise reduction component and the second noise reduction component are asymmetrically arranged to adapt to the air intake volume on both sides of the smoke outlet, and the first noise reduction component and the second noise reduction component are both provided with sound absorbing noise reduction components.

[0009] Compared with the background technology, the range hood described in the utility model has the following beneficial effects: the range hood includes a first noise reduction component and a second noise reduction component, which are arranged in the smoke collecting chamber and respectively located on both sides of the smoke outlet to form a guide channel; along the flow direction of the oil smoke, the width of the guide channel gradually decreases. The first noise reduction component and the second noise reduction component are arranged at the shoulder positions on both sides of the smoke collecting chamber, which can guide the flow of the oil smoke and make it flow along the guide channel with a gradually decreasing width; because the width of the guide channel is gradually reduced, the oil smoke is prevented from forming vortices due to the sudden change in the size of the guide channel, thereby eliminating broadband vortex noise. The first noise reduction component and the second noise reduction component are both provided with sound absorbing and noise reduction components, which can absorb the noise generated by the flow of oil smoke through the smoke inlet, and further reduce the noise decibel value of the range hood; since the air intake of the fan in the entire circumference is different, no matter whether the fan is set upright or horizontally, the air intake on both sides of the smoke outlet is different. The side with a larger air intake has a larger vortex area and greater vortex noise due to the large oil smoke flow rate and fast flow rate. Therefore, the first noise reduction component and the second noise reduction component are asymmetrically arranged to adapt to the air intake on both sides of the smoke outlet, eliminate the vortex areas on both sides, so that the smoke inlet can intake smoke evenly, improve the smoke intake efficiency, avoid user discomfort due to the amplified noise difference on both sides, and enhance the user experience of the range hood.

[0010] In one embodiment, the first noise reduction component has a first guide surface, and the second noise reduction component has a second guide surface. The first guide surface and the second guide surface are arranged opposite to each other to form the guide channel. The length of the first guide surface is smaller than the length of the second guide surface to form the asymmetric setting.

[0011] In one embodiment, the upper end of the first noise reduction member and the upper end of the second noise reduction member are respectively located on the left and right sides of the smoke outlet, and the lower end of the first noise reduction member is higher than the lower end of the second noise reduction member so that the length of the first guide surface is smaller than the length of the second guide surface to form the asymmetric arrangement; and / or,

[0012] The first guide surface extends along a straight line and the second guide surface extends along a curve to form the asymmetric arrangement.

[0013] In one of the embodiments, the first noise reduction component and the second noise reduction component are both provided with a fixed bracket, the fixed bracket is connected to the smoke collecting shell, and the fixed bracket is inclined from bottom to top toward the direction close to the other fixed bracket so that the width of the guide channel gradually decreases; the fixed bracket is provided with a plurality of sound-absorbing through holes, and the sound-absorbing noise reduction component is arranged on a side of the fixed bracket away from the guide channel.

[0014] In one embodiment, the diameter of the sound absorbing through hole is 0.9 mm-2 mm; and / or,

[0015] The hole spacing between adjacent sound-absorbing through holes is 4 mm to 8 mm; and / or,

[0016] The opening rate of the fixing bracket is 5%-10%.

[0017] In one of the embodiments, the fixed bracket includes a support plate and a plurality of mounting clips connected to the support plate, the plurality of mounting clips are respectively arranged on both sides of the support plate to form a mounting groove, the sound-absorbing through hole is arranged on the support plate, and the sound-absorbing and noise-reducing component is attached to the support plate and clamped in the mounting groove.

[0018] In one embodiment, the fixing bracket further includes a first mounting portion, the first mounting portion is disposed at the lower end of the support plate, and the first mounting portion is connected to the inner cavity wall of the smoke collecting housing; and / or,

[0019] The fixing bracket further includes a second mounting portion, which is disposed at the upper end of the support plate, and the second mounting portion is connected to the inner cavity wall of the fan assembly or the inner cavity wall of the smoke collecting housing.

[0020] In one embodiment, a plurality of the mounting buckles are spaced apart on one side of the support plate; and / or,

[0021] The mounting buckle is provided with a bending hole, and the mounting buckle can be bent along the bending hole to limit the sound absorbing and noise reducing component from leaving the mounting groove.

[0022] In one embodiment, the fan assembly includes a bellows housing and a fan disposed in the bellows housing, the smoke exhaust passage is disposed in the bellows housing, and the fan is uprightly disposed with an air inlet facing the rear cavity wall of the bellows housing.

[0023] In one embodiment, the range hood further includes an oil filter net, which is detachably connected to the smoke collecting shell and is arranged in the smoke collecting chamber. Along the flow direction of the oil smoke, the oil filter net is located between the smoke inlet and the flow guide and noise reduction component, and the oil filter net is a double-layer filter net. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a vortex formed in a smoke collecting chamber of a conventional range hood;

[0025] Figure 2 The structure diagram of the range hood provided by the embodiment of the utility model Figure 1 ;

[0026] Figure 3 The structure diagram of the range hood provided by the embodiment of the utility model Figure 2 ;

[0027] Figure 4 A structural cross-sectional view of a range hood provided by an embodiment of the utility model;

[0028] Figure 5 A schematic diagram of the disassembly of the structure of the first noise reduction component provided in an embodiment of the utility model;

[0029] Figure 6 A schematic diagram of the structure of the fixing bracket provided in an embodiment of the utility model when the mounting buckle is not bent;

[0030] Figure 7 The structure diagram of the range hood provided by the embodiment of the utility model Figure 1 ;

[0031] Figure 8 The structure diagram of the range hood provided by the embodiment of the utility model Figure 2 .

[0032] Description of labels:

[0033] 1. Smoke collecting shell; 11. Smoke inlet; 12. Smoke outlet; 2. Diversion and noise reduction assembly; 21. First noise reduction member; 211. Sound absorption and noise reduction member; 212. First diversion surface; 213. Fixed bracket; 2131. Sound absorption through hole; 2132. Support plate; 2133. Mounting buckle; 21331. Bending hole; 2134. Mounting groove; 2135. First mounting part; 2136. Second mounting part; 22. Second noise reduction member; 221. Second diversion surface; 23. Diversion channel;

[0034] 100, fan assembly; 101, bellows housing; 102, fan; 200, oil filter;

[0035] 300. Eddy current. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] In the description of the present application, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do 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 should not be understood as a limitation on the present application.

[0038] The terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] like Figure 2-Figure 8 As shown, the embodiment of the utility model provides a range hood, the range hood includes a fan assembly 100, the fan assembly 100 includes a bellows housing 101 with a smoke exhaust channel, and a fan 102 is arranged in the bellows housing 101. The range hood also includes a smoke collecting housing 1 and a flow guide and noise reduction assembly 2, the smoke collecting housing 1 is provided with a smoke inlet 11 and a smoke outlet 12, and the smoke collecting housing 1 has a smoke collecting cavity connecting the smoke inlet 11 and the smoke outlet 12. The fan assembly 100 is arranged above the smoke outlet 12, and the smoke inlet 11 faces the stove. Under the action of the fan assembly 100, the oil smoke generated by cooking enters the smoke collecting cavity from the smoke inlet 11, and flows to the fan assembly 100 above through the smoke outlet 12, and is discharged outdoors through the fan assembly 100.

[0041] The guide noise reduction assembly 2 includes a first noise reduction member 21 and a second noise reduction member 22. The first noise reduction member 21 and the second noise reduction member 22 are arranged in the smoke collecting chamber and are respectively located on the left and right sides of the smoke outlet 12 to form a guide channel 23. Along the flow direction of the oil smoke, the width of the guide channel 23 gradually decreases. Figure 2 As shown. The first noise reduction member 21 and the second noise reduction member 22 are arranged at the shoulder positions on both sides of the smoke collecting chamber, which can guide the flow of oil smoke and make it flow along the guide channel 23 with a gradually decreasing width; since the width of the guide channel 23 is gradually reduced, the oil smoke is prevented from forming a vortex 300 due to the sudden change in the size of the guide channel 23, thereby eliminating the broadband vortex noise. The first noise reduction member 21 and the second noise reduction member 22 are both provided with a sound absorbing and noise reducing member 211, which can absorb the noise generated by the flow of oil smoke through the smoke inlet 11, further reduce the decibel value of the noise of the range hood, avoid the noise difference on both sides, and enhance the user experience of the range hood. The sound absorbing and noise reducing member 211 is made of porous sound absorbing material. Preferably, the sound absorption coefficient of the sound absorbing and noise reducing member 211 is greater than 0.8.

[0042] Since the air intake of the fan 102 is different in the entire circumference, no matter whether the fan 102 is set upright or horizontally, the air intake on both sides of the smoke outlet 12 is different. The side with a larger air intake has a larger vortex area and a larger vortex noise due to the large oil smoke flow rate and fast flow rate. Therefore, the first noise reduction component 21 and the second noise reduction component 22 are asymmetrically arranged to adapt to the air intake on both sides of the smoke outlet 12, eliminate the vortex areas on both sides, so that the smoke inlet 11 can evenly intake smoke, improve the smoke intake efficiency, and avoid the user's discomfort caused by the amplification of the noise difference on both sides. This asymmetrical setting structure has multiple implementation forms, and its purpose is to make the diversion area area and diversion path length on both sides of the formed diversion channel 23 different, so as to achieve adaptation with the air intake on both sides of the smoke outlet 12.

[0043] In one embodiment, the first noise reducing member 21 has a first guide surface 212, and the second noise reducing member 22 has a second guide surface 221. The first guide surface 212 and the second guide surface 221 face each other to form a guide channel 23. The length of the first guide surface 212 is less than the length of the second guide surface 221 to form an asymmetric arrangement. It can be understood that the length of the second guide surface 221 is longer, so that the guide channel 23 has a larger guide area and a longer guide path length on the side of the second guide surface 221, or the second guide surface 221 contacts the oil smoke flowing upward earlier, and the oil smoke has a more significant guide effect. In this way, even if the air intake at different directions of the fan is different, the second guide surface 221 with a longer length can meet the guide requirements of the oil smoke with a larger flow rate and a faster flow rate, so that the oil smoke flows in an orderly manner along the second guide surface 221 to avoid vortex 300.

[0044] In order to achieve that the length of the first guide surface 212 is smaller than the length of the second guide surface 221, in one embodiment, along the height direction of the smoke collecting chamber, the lower end of the first noise reduction member 21 is higher than the lower end of the second noise reduction member 22 so that the length of the first guide surface 212 is smaller than the length of the second guide surface 221 to form an asymmetric arrangement; at this time, the first guide surface 212 and the second guide surface 221 can extend along a straight line at the same time, such as Figure 2 As shown; or at the same time extending along the curve with an arc, such as Figure 3 When the upper end of the first noise reduction member 21 and the upper end of the second noise reduction member 22 are both arranged at the smoke inlet 11 and are at the same height, the length of the first guide surface 212 and the second guide surface 221 are determined by their lower ends: when the lower end of the first noise reduction member 21 is higher than the lower end of the second noise reduction member 22, the length of the first guide surface 212 is smaller than the length of the second guide surface 221, and the second guide surface 221 can contact the oil smoke earlier to guide the oil smoke, so as to adapt to more oil smoke and faster oil smoke flow rate.

[0045] In another embodiment, in order to achieve that the length of the first guide surface 212 is less than the length of the second guide surface 221, the first guide surface 212 extends along a straight line and the second guide surface 221 extends along a curve to form an asymmetric arrangement; it can be understood that when the upper end of the first noise reduction component 21 and the upper end of the second noise reduction component 22 are at the same height, and the lower end of the first noise reduction component 21 and the lower end of the second noise reduction component 22 are at the same height, the length of the first guide surface 212 extending along the straight line is less than the length of the second guide surface 221 extending along the curve, and the second noise reduction component 22 can form a larger guide area.

[0046] It should be noted that the air intake of the fan 102 is generally the largest in the third quadrant along the circumferential direction; Figure 4 As shown, when the fan 102 is arranged upright and the air inlet is facing the rear wall of the bellows housing 101, the oil smoke flow rate on the right side of the smoke outlet 12 is the largest and the flow rate is the fastest. At this time, it is necessary to form a larger guide area and a longer guide path length on the right side of the guide channel 23. In other embodiments, when the arrangement position of the fan 102 changes, the positions of the first noise reduction member 21 and the second noise reduction member 22 also change accordingly, which is not limited to the drawings of this embodiment.

[0047] In one embodiment, the first noise reduction member 21 and the second noise reduction member 22 both include a fixing bracket 213, the fixing bracket 213 is connected to the smoke collecting housing 1, and the fixing bracket 213 is tilted from bottom to top toward the direction close to the other fixing bracket 213 so that the width of the guide channel 23 gradually decreases, and the fixing bracket 213 is used to support the sound absorbing and noise reduction member 211. Figure 5As shown, the fixed bracket 213 is provided with a plurality of sound-absorbing through holes 2131, which face the flow guide channel 23 and are connected to the sound-absorbing and noise-reducing component 211. Noise passes through the sound-absorbing through holes 2131 and is absorbed by the sound-absorbing and noise-reducing component 211. The sound-absorbing and noise-reducing component 211 is in a strip-shaped structure, preferably with a thickness of 15 mm to 50 mm, and is disposed on a side of the fixed bracket 213 away from the flow guide channel 23.

[0048] In order to better fix the position of the sound absorbing and noise reducing member 211, in one embodiment, the fixing bracket 213 includes a support plate 2132 and a plurality of mounting buckles 2133 connected to the support plate 2132. The plurality of mounting buckles 2133 are respectively arranged on both sides of the support plate 2132 to form mounting grooves 2134, the sound absorbing through holes 2131 are arranged on the support plate 2132, and the sound absorbing and noise reducing member 211 is attached to the support plate 2132 and is mounted in the mounting grooves 2134.

[0049] In one embodiment, the fixed bracket 213 also includes a first mounting portion 2135, which is arranged at the lower end of the support plate 2132, and the first mounting portion 2135 and the support plate 2132 are arranged at an angle, and the first mounting portion 2135 is in contact with the inner cavity wall of the smoke collecting housing 1, so as to realize the inclined setting of the support plate 2132. The detachable connection between the first mounting portion 2135 and the inner cavity wall of the smoke collecting housing 1 can be realized by fasteners such as screws. Specifically, the first mounting portion 2135 can be installed on the cavity walls on both sides of the smoke collecting housing 1, so that the fixed bracket 213 can be extended obliquely from the side cavity wall to the bellows housing 101; moreover, the first mounting portion 2135 is in contact with the side cavity wall, so as to form a better seal for the shoulder positions on both sides in the smoke collecting cavity, and the oil smoke flows completely along the diversion and noise reduction component 2, and will not flow to the shoulders on both sides in the smoke collecting cavity.

[0050] In one embodiment, the fixing bracket 213 further includes a second mounting portion 2136, which is disposed at the upper end of the support plate 2132, and the second mounting portion 2136 is connected to the inner cavity wall of the fan assembly 100 or the inner cavity wall of the smoke collecting housing 1. The second mounting portion 2136 and the support plate 2132 are also disposed at an angle to realize the inclined setting of the support plate 2132. This method of fixing the support plate 2132 from both ends increases the stability of the first noise reduction member 21 and the second noise reduction member 22.

[0051] Specifically, the second mounting portion 2136 has a plurality of mounting positions, and the different mounting positions also make the angle between the second mounting portion 2136 and the support plate 2132 different. For example, when the second mounting portion 2136 is connected to the inner cavity wall of the fan assembly 100 (refer to Figure 2), the angle between the second mounting portion 2136 and the support plate 2132 is greater than 90°, the outlet area of ​​the guide channel 23 is equal to the cross-sectional area of ​​the smoke outlet 12, and the flow of oil smoke is smoother. Of course, the second mounting portion 2136 can also be connected to the upper cavity wall of the smoke collecting shell 1. When the angle between the second mounting portion 2136 and the support plate 2132 is greater than 90°, the second mounting portion 2136 fits the upper cavity wall of the smoke collecting shell 1 and extends toward the direction of the bellows shell 101; or, when the angle between the second mounting portion 2136 and the support plate 2132 is less than 90°, the second mounting portion 2136 fits the upper cavity wall of the smoke collecting shell 1 and extends away from the bellows shell 101. Both are possible. The specific design can be selected according to the internal structure of the range hood.

[0052] In one embodiment, a plurality of mounting buckles 2133 are arranged at intervals on one side of the support plate 2132, so that the clamping of the sound absorbing and noise reducing member 211 is more stable. Optionally, the mounting buckle 2133 is provided with a bending hole 21331, and the mounting buckle 2133 can be bent along the bending hole 21331 to limit the sound absorbing and noise reducing member 211 so that it does not leave the mounting groove 2134, further increasing the reliability of the sound absorbing and noise reducing member 211, and avoiding the displacement of the sound absorbing and noise reducing member 211 and affecting the noise reduction effect. Due to the existence of the bending hole 21331, the mounting buckle 2133 can be easily bent, without the need to use bending equipment such as a bending machine, and can be bent manually, thereby simplifying the processing technology. The mounting buckle 2133 can be provided with a plurality of bending holes 21331, and the spacing between adjacent bending holes 21331 is 5mm-10mm, so that the mounting buckle 2133 has sufficient structural strength to avoid being broken.

[0053] In one embodiment, the diameter of the sound-absorbing through hole 2131 is 0.9 mm to 2 mm. A plurality of sound-absorbing through holes 2131 are spaced apart and arranged in an array, and the hole spacing between adjacent sound-absorbing through holes 2131 is 4 mm to 8 mm. In order to ensure the noise transmission rate, the diameter of the sound-absorbing through hole 2131 is positively correlated with the hole spacing, that is, when the diameter of the sound-absorbing through hole 2131 increases, the hole spacing thereof also increases accordingly, and when the diameter of the sound-absorbing through hole 2131 is smaller, the hole spacing thereof also decreases accordingly, so that the opening rate of the fixed bracket 213 reaches 5% to 10%. The size design values ​​of the above-mentioned sound-absorbing through holes 2131 may meet one or more of the requirements, and this embodiment does not impose any specific restrictions.

[0054] In one embodiment, if Figure 7As shown, the fan 102 of the fan assembly 100 is arranged upright and the air inlet is facing the rear cavity wall of the bellows housing 101. This arrangement of the fan 102 can reduce the impact of the noise of the air inlet on the indoor environment of the kitchen; and, as mentioned above, the air intake of the fan 102 is usually the largest in the third quadrant along the circumferential direction. When the fan 102 is arranged upright and the air inlet is facing the rear cavity wall of the bellows housing 101, the oil smoke flow rate on the right side of the smoke outlet 12 is the largest and the flow rate is the fastest. In this way, it is convenient to arrange the second noise reduction member 22 on the right side of the smoke collecting chamber. The second noise reduction member 22 can cover the thickness range of the smoke collecting chamber (reference Figure 4 ) to ensure the sealing of the guide channel 23, so that the oil smoke can only enter the bellows housing 101 through the guide channel 23.

[0055] In one embodiment, the range hood further comprises an oil filter 200, such as Figure 8 As shown; the oil filter 200 is detachably connected to the smoke collecting housing 1 and is arranged in the smoke collecting chamber. Along the flow direction of the oil smoke, the oil filter 200 is located between the smoke inlet 11 and the guide noise reduction component 2. The oil filter 200 is set as a double-layer oil filter structure. The oil filter 200 can separate the oil smoke flowing into the smoke collecting chamber through the smoke inlet 11, reduce the concentration of particulate matter in the oil smoke, and protect the fan 102. Due to the existence of the oil filter 200, the oil smoke will generate greater noise when passing through the oil filter 200, and it is easier to form vortices due to the flow resistance brought by the oil filter 200. At this time, the first noise reduction component 21 and the second noise reduction component 22 can guide the flow of the oil smoke, eliminate the vortex 300 and the vortex noise, and absorb the noise generated when the oil smoke passes through the oil filter 200, so that the range hood has multiple advantages such as good oil smoke filtering effect, high smoke intake efficiency, and low noise. The oil filter 200 is arranged in the smoke collecting chamber, closer to the guide noise reduction component 2 , and the first noise reduction component 21 and the second noise reduction component 22 have a better effect of eliminating the noise generated by the oil filter 200 .

[0056] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features 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.

[0057] The specific contents of the above specific implementations only express several implementations of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A range hood, comprising a fan assembly (100), wherein the fan assembly (100) has a smoke exhaust passage, characterized in that: The range hood further comprises: A smoke collecting housing (1), the smoke collecting housing (1) being provided with a smoke inlet (11) and a smoke outlet (12), the smoke collecting housing (1) having a smoke collecting cavity communicating with the smoke inlet (11) and the smoke outlet (12), the smoke outlet (12) being communicated with the smoke exhaust channel; A flow guide noise reduction component (2), the flow guide noise reduction component (2) comprising a first noise reduction component (21) and a second noise reduction component (22), the first noise reduction component (21) and the second noise reduction component (22) being arranged in the smoke collecting chamber and respectively located on both sides of the smoke outlet (12) to form a flow guide channel (23), the width of the flow guide channel (23) gradually decreasing along the flow direction of the oil smoke; the first noise reduction component (21) and the second noise reduction component (22) being asymmetrically arranged to adapt to the air intake volume on both sides of the smoke outlet (12), and the first noise reduction component (21) and the second noise reduction component (22) being both provided with a sound absorbing noise reduction component (211).

2. The range hood according to claim 1, characterized in that: The first noise reduction component (21) has a first flow guide surface (212), and the second noise reduction component (22) has a second flow guide surface (221); the first flow guide surface (212) and the second flow guide surface (221) are arranged relative to each other to form the flow guide channel (23); the length of the first flow guide surface (212) is smaller than the length of the second flow guide surface (221) to form the asymmetric arrangement.

3. The range hood according to claim 2, characterized in that: The upper end of the first noise reduction member (21) and the upper end of the second noise reduction member (22) are respectively located on the left and right sides of the smoke outlet (12), and the lower end of the first noise reduction member (21) is higher than the lower end of the second noise reduction member (22) so that the length of the first guide surface (212) is smaller than the length of the second guide surface (221) to form the asymmetric arrangement; and / or, The first flow guiding surface (212) extends along a straight line and the second flow guiding surface (221) extends along a curve to form the asymmetric arrangement.

4. The range hood according to claim 1, characterized in that: The first noise reduction component (21) and the second noise reduction component (22) are both provided with a fixed bracket (213), the fixed bracket (213) is connected to the smoke collecting shell (1), and the fixed bracket (213) is inclined from bottom to top in a direction close to the other fixed bracket (213) so that the width of the guide channel (23) is gradually reduced; the fixed bracket (213) is provided with a plurality of sound-absorbing through holes (2131), and the sound-absorbing noise reduction component (211) is arranged on a side of the fixed bracket (213) away from the guide channel (23).

5. The range hood according to claim 4, characterized in that: The diameter of the sound-absorbing through hole (2131) is 0.9 mm to 2 mm; and / or, The hole spacing between adjacent sound-absorbing through holes (2131) is 4 mm to 8 mm; and / or, The opening rate of the fixing bracket (213) is 5%-10%.

6. The range hood according to claim 4, characterized in that: The fixing bracket (213) comprises a support plate (2132) and a plurality of mounting buckles (2133) connected to the support plate (2132); the plurality of mounting buckles (2133) are respectively arranged on both sides of the support plate (2132) to form a mounting groove (2134); the sound absorbing through hole (2131) is arranged on the support plate (2132); and the sound absorbing and noise reducing component (211) is attached to the support plate (2132) and is mounted in the mounting groove (2134).

7. The range hood according to claim 6, characterized in that: The fixing bracket (213) further comprises a first mounting portion (2135), the first mounting portion (2135) being arranged at the lower end of the supporting plate (2132), the first mounting portion (2135) being connected to the inner cavity wall of the smoke collecting housing (1); and / or, The fixing bracket (213) further comprises a second mounting portion (2136), wherein the second mounting portion (2136) is arranged at the upper end of the support plate (2132), and the second mounting portion (2136) is connected to the inner cavity wall of the fan assembly (100) or the inner cavity wall of the smoke collecting shell (1).

8. The range hood according to claim 6, characterized in that: A plurality of the mounting buckles (2133) are arranged at intervals on one side of the support plate (2132); and / or, The mounting buckle (2133) is provided with a bending hole (21331), and the mounting buckle (2133) can be bent along the bending hole (21331) to limit the sound absorption and noise reduction component (211) from being separated from the mounting groove (2134).

9. The range hood according to any one of claims 1 to 8, characterized in that: The fan assembly (100) comprises a bellows housing (101) and a fan (102) arranged in the bellows housing (101); the smoke exhaust passage is arranged in the bellows housing (101); the fan (102) is arranged upright with its air inlet facing the rear cavity wall of the bellows housing (101).

10. The range hood according to any one of claims 1 to 8, characterized in that: The range hood further comprises an oil filter (200), the oil filter (200) being detachably connected to the smoke collecting housing (1) and arranged in the smoke collecting chamber; along the flow direction of the oil smoke, the oil filter (200) is located between the smoke inlet (11) and the flow guide and noise reduction component (2); the oil filter (200) is a double-layer filter.

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