Range hood

Abstract

The utility model provides a range hood, which relates to the field of kitchen appliances, and comprises an air duct and an air duct shell, an adjusting component is arranged between the air duct shell and the air duct, and the adjusting component can adjust the stress mode of the air duct so as to adjust the vibration frequency of the air duct. According to the extractor hood, the stress mode of the air duct is adjusted through the adjusting assembly so as to adjust the vibration frequency of the air duct, the problem of abnormal noise generated by resonance of the air duct of the extractor hood and the motor can be completely solved, and the user experience feeling is improved.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliances, and in particular to a range hood. Background Technology

[0002] The sound quality produced by range hoods during operation can vary, sometimes resulting in what are known as "humming," "puffing," "whistling," or "sizzling" noises—collectively referred to as abnormal noises from range hoods. These abnormal noises can seriously affect the product quality of a range hood and cause discomfort to the listener. Therefore, controlling these abnormal noises is receiving increasing attention.

[0003] The main source of abnormal noise from a range hood is the resonance between the motor and the duct (meaning the difference in vibration frequency between the motor and the duct is within a certain range), which generates low-frequency noise. Currently, the conventional solution is to adjust the motor speed to change its vibration frequency. However, adjusting the motor speed will affect the air volume, resulting in a limited adjustable range. Utility Model Content

[0004] The purpose of this utility model is to provide a range hood to alleviate the technical problem of abnormal noise in existing range hoods.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] This utility model provides a range hood, which includes an air duct and an air duct housing. An adjustment component is installed between the air duct housing and the air duct. The adjustment component can adjust the force mode of the air duct, thereby adjusting the vibration frequency of the air duct.

[0007] The range hood provided by this utility model has an adjustment component that adjusts the force mode of the air duct inside the air duct shell, changes the vibration frequency of the air duct, and makes the vibration frequency of the air duct different from that of the motor. This eliminates the abnormal noise caused by the resonance between the air duct and the motor without affecting the air volume, thus improving the user experience.

[0008] In the optional technical solution of the range hood provided by this utility model, the adjustment component includes a driving component and a driven component; one of the driving component and the driven component is fixed to the air duct housing, and the other is fixed to the air duct; the driving component can control the driven component to move closer to or further away from the driving component.

[0009] In some alternative technical solutions, the driving component includes a first magnetic base on which an electromagnet is fixed, and the driven component includes a second magnetic base on which a magnetic material is fixed.

[0010] Optionally, the first magnetic base includes a first housing and a cover plate, the electromagnet is disposed inside the first housing, and the cover plate is sealed and fixed to the first housing by a sealing ring.

[0011] Optionally, one end of the electromagnet is embedded in a limiting groove in the inner wall of the first housing, and the other end of the electromagnet is provided with a connecting piece, which is fixed to the inner wall of the first housing by fasteners; and / or, sound-absorbing cotton is provided on the side of the cover plate facing the inside of the first housing.

[0012] Optionally, the first magnetic base is fixed to the duct housing, and a guide portion is provided on the side of the first magnetic base away from the duct. The outer surface of the guide portion forms an inclined surface capable of guiding the airflow from the air intake side of the range hood towards the center of the impeller of the range hood. Optionally, the guide portion is made of a perforated plate.

[0013] Optionally, the second magnetic base includes a second housing, and the magnetic material is fixed to one end of the second housing located away from the air duct; and / or, the housing wall of the second housing is provided with a plurality of sound-absorbing holes; and / or, the second magnetic base includes a support frame, and the support frame is fixedly installed in the air duct.

[0014] In some alternative technical solutions, the drive assembly includes an electric push rod and a push rod base, the push rod base being fixedly connected to the air duct housing, and the drive end of the electric push rod being fixedly installed on the push rod base; the driven assembly includes a fixed seat and at least one elastic element, the fixed seat being integrally or fixedly connected to the air duct, and each of the elastic elements having one end connected to the push rod end of the electric push rod and the other end connected to the fixed seat.

[0015] Optionally, an oil baffle is provided on the outside of the drive end of the electric push rod.

[0016] In particular, in the above-mentioned technical solutions of this utility model, "and / or" means that the feature before "and / or" and the feature after "and / or" are designed simultaneously or selectively. Attached Figure Description

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

[0018] Figure 1 This is a schematic diagram of the overall structure of the range hood provided in Embodiment 1 of this utility model;

[0019] Figure 2 This is a cross-sectional view of the overall structure of the first embodiment of the range hood provided by this utility model;

[0020] Figure 3 for Figure 2 A magnified view of the local structure;

[0021] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of the range hood provided by this utility model.

[0022] Icons: 100-Air duct; 200-Air duct housing; 11-First magnetic base; 111-First housing; 112-Cover plate; 113-Sealing ring; 12-Electromagnet; 121-Connecting piece; 13-Fastener; 14-Sound absorbing cotton; 15-Air guide; 16-Wire channel; 21-Second magnetic base; 211-Second housing; 212-Support frame; 22-Magnetic material; 31-Electric push rod; 32-Push rod base; 33-Fixed seat; 34-Elastic element; 35-Oil baffle. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] It should be noted that similar labels and letters in the accompanying drawings indicate similar items. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0029] The main source of abnormal noise in range hoods is the resonance between the motor and the duct (meaning the vibration frequency difference between the motor and the duct is within a certain range), which generates low-frequency noise. Based on this, this utility model provides a range hood, referring to... Figures 1 to 4 The range hood includes a duct housing 200 and a duct 100. An adjustment component is installed between the duct housing 200 and the duct 100. The adjustment component can adjust the force mode of the duct 100, thereby adjusting the vibration frequency of the duct 100.

[0030] The range hood provided by this utility model has an adjustment component that adjusts the force mode of the air duct 100 within the air duct housing 200, thereby changing the vibration frequency of the air duct 100 so that its vibration frequency is different from that of the motor. This eliminates the abnormal noise generated by the resonance between the air duct 100 and the motor without affecting the air volume, thus improving the user experience.

[0031] Specifically, in the range hood provided by this utility model, the above-mentioned adjustment component has a variety of optional structures, including but not limited to including the above-mentioned adjustment component with counterweights of different weights, and achieving the above-mentioned adjustment function by adsorbing or hooking different counterweights on the air duct 100 (preferably, but not limited to, the position of the air duct 100 near the bottom when the range hood is placed in the normal working posture), or by adopting other optional structural forms.

[0032] In order to facilitate assembly and manufacturing as well as operation, and to enable timely and efficient adjustment of the force mode of the air duct 100 using the adjustment components, thereby regulating the vibration frequency of the air duct 100, in some embodiments of this example, reference is made to... Figures 1 to 4 The aforementioned adjustment assembly includes a driving assembly and a driven assembly; wherein, one of the driving assembly and the driven assembly is fixed to the air duct housing 200 and the other is fixed to the air duct 100, and the driving assembly is capable of controlling the driven assembly to move closer to or further away from the driving assembly.

[0033] The drive component can be manually controlled or electrically controlled, preferably electrically controlled for quick adjustment. When it is electrically controlled, a vibration frequency sensor can also be installed outside the duct 100 and connected to the range hood controller to monitor the vibration frequency of the duct 100. The program can then call the sensor to determine whether the drive component needs to be activated to adjust the force mode of the duct 100 and thus change the vibration frequency of the duct 100.

[0034] Based on this, the specific optional structures of the range hood provided by this utility model include at least the following optional embodiments:

[0035] Example 1

[0036] This embodiment provides a range hood, see reference. Figures 1 to 3 The range hood includes a duct housing 200 and a duct 100. An adjustment component is installed between the duct housing 200 and the duct 100. The adjustment component includes a drive component and a driven component. One of the drive component and the driven component is fixed to the duct housing 200 and the other is fixed to the duct 100. The drive component can control the driven component to move closer to or further away from the drive component.

[0037] Specifically, continue to refer to Figures 1 to 3 The driving component includes a first magnetic base 11 on which an electromagnet 12 is fixed, and a driven component includes a second magnetic base 21 on which a magnetic material 22 is fixed. The wiring of the electromagnet 12 passes through the wire channel 16 and is connected to the controller of the range hood. The controller controls the current of the electromagnet 12 to control the magnetic force of the electromagnet 12, thereby controlling the magnetic attraction of the electromagnet 12 to the magnetic material 22. Under the action of the magnetic attraction, the magnetic material 22 approaches or is attracted to the electromagnet 12, thereby adjusting the force mode of the air duct 100.

[0038] Considering that the electromagnet 12 may be affected by oil stains, which may weaken its magnetic force when energized, in this embodiment, the first magnetic base 11 preferably includes a first housing 111 and a cover plate 112. The electromagnet 12 is disposed inside the first housing 111, and the cover plate 112 is sealed and fixed to the first housing 111 by a sealing ring 113, so as to protect the electromagnet 12 from contamination through the first housing 111.

[0039] The specific fixing method of the electromagnet 12 inside the first housing 111 includes, but is not limited to, bonding, welding, or other specific fixing and connection methods. Preferably, to facilitate assembly and ensure the stability of the structure after assembly, refer to... Figures 1 to 3 One end of the electromagnet 12 is embedded in a limiting groove provided in the inner wall of the first housing 111, and the other end of the electromagnet 12 is provided with a connecting piece 121. The connecting piece 121 is fixed to the inner wall of the first housing 111 by a fastener 13. The fastener 13 has a variety of optional types, including but not limited to screws or pins.

[0040] In this embodiment, optionally, sound-absorbing cotton 14 can be provided on the side of the cover plate 112 facing the inside of the first housing 111, so as to further absorb noise through the sound-absorbing cotton 14 and further improve the user experience.

[0041] Continue to refer to Figures 1 to 3 In this embodiment, the driving component is disposed on the air duct housing 200, and the driven component is disposed on the air duct 100, preferably but not limited to the position of the driven component at the bottom of the air duct 100 when the range hood is placed in the normal working position.

[0042] Optionally, the first magnetic base 11 of the drive assembly is fixed to the duct housing 200. A guide portion 15 is provided on the side of the first magnetic base 11 away from the duct 100. The outer surface of the guide portion 15 forms an inclined surface that guides the airflow from the intake side of the range hood towards the center of the impeller, thereby improving the smoke extraction efficiency of the range hood. Further, but not limited to, the guide portion 15 is made of a perforated plate to further absorb noise through the porous structure.

[0043] Optionally, the second magnetic base 21 of the driven component includes a second housing 211, with a magnetic material 22 fixed to the end of the second housing 211 located away from the air duct 100. To protect the magnetic material 22, it can be snap-fitted, threaded, or otherwise fixed to the outside of the second housing 211, or it can be disposed inside the second housing 211 to protect it from oil contamination. The magnetic material 22 can be, but is not limited to, a metal block or similar structure. In this embodiment, multiple sound-absorbing holes can be provided on the housing wall of the second housing 211 to further absorb noise through the porous structure. Furthermore, the second magnetic base 21 of the driven component may also include a support frame 212, which is fixedly installed in the air duct 100 to maintain the overall stability of the second magnetic base 21.

[0044] Example 2

[0045] This embodiment provides a range hood, see reference. Figure 4 The range hood includes a duct housing 200 and a duct 100. An adjustment component is installed between the duct housing 200 and the duct 100. The adjustment component includes a drive component and a driven component. One of the drive component and the driven component is fixed to the duct housing 200 and the other is fixed to the duct 100. The drive component can control the driven component to move closer to or further away from the drive component.

[0046] Specifically, continue to refer to Figure 4 The aforementioned driving assembly includes an electric push rod 31 and a push rod base 32. The push rod base 32 is fixedly connected to the duct housing 200, and the driving end of the electric push rod 31 is fixedly installed on the push rod base 32. The driven assembly includes a fixed seat 33 and at least one elastic element 34. The fixed seat 33 is integrally or fixedly connected to the duct 100. Each elastic element 34 has one end connected to the push rod end of the electric push rod 31 and the other end connected to the fixed seat 33. The driving end of the electric push rod 31 is connected to the controller of the range hood via a wire or signal. The controller controls the extension and retraction of the electric push rod 31, thereby controlling the tension of the elastic element 34 on the duct 100 and adjusting the force mode of the duct 100. The elastic element 34 can be of various types, including but not limited to springs and rubber bands.

[0047] In this embodiment, optionally, but not limited to, an oil baffle 35 is provided on the outside of the drive end of the electric push rod 31 to prevent the drive end of the electric push rod 31 from being corroded by oil.

[0048] Finally, it should be noted that:

[0049] 1. In this instruction manual, "and / or" means that the content before "and / or" and the content after "and / or" are designed into the range hood simultaneously or selectively;

[0050] 2. The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to mutually. The above embodiments in this specification are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A range hood, comprising a duct (100) and a duct housing (200), characterized in that: An adjustment component is installed between the air duct housing (200) and the air duct (100). The adjustment component can adjust the force mode of the air duct (100) and thus adjust the vibration frequency of the air duct (100).

2. The range hood according to claim 1, characterized in that: The adjustment component includes a driving component and a driven component; One of the driving component and the driven component is fixed to the air duct housing (200), and the other is fixed to the air duct (100). The driving component can control the driven component to move closer to or further away from the driving component.

3. The range hood according to claim 2, characterized in that: The driving component includes a first magnetic base (11) on which an electromagnet (12) is fixed, and the driven component includes a second magnetic base (21) on which a magnetic material (22) is fixed.

4. The range hood according to claim 3, characterized in that: The first magnetic base (11) includes a first housing (111) and a cover plate (112). The electromagnet (12) is located inside the first housing (111), and the cover plate (112) is sealed and fixed to the first housing (111) by a sealing ring (113).

5. The range hood according to claim 4, characterized in that: One end of the electromagnet (12) is embedded in a limiting groove in the inner wall of the first housing (111), and the other end of the electromagnet (12) is provided with a connecting piece (121). The connecting piece (121) is fixed to the inner wall of the first housing (111) by a fastener (13). And / or, sound-absorbing cotton (14) is provided on the side of the cover plate (112) facing the interior of the first housing (111).

6. The range hood according to any one of claims 3-5, characterized in that: The first magnetic base (11) is fixed to the air duct housing (200). The first magnetic base (11) is provided with a guide portion (15) on the side away from the air duct (100). The outer surface of the guide portion (15) forms an inclined surface that can guide the airflow from the air intake side of the range hood to the center of the impeller of the range hood.

7. The range hood according to claim 6, characterized in that: The flow guide (15) is made of a perforated plate.

8. The range hood according to any one of claims 3-5, characterized in that: The second magnetic base (21) includes a second housing (211), and the magnetic material (22) is fixed to the second housing (211) at the end away from the air duct (100); And / or, the shell wall of the second housing (211) is provided with a plurality of sound-absorbing holes; And / or, the second magnetic base (21) includes a support frame (212) which is fixedly installed in the air duct (100).

9. The range hood according to claim 2, characterized in that: The drive assembly includes an electric push rod (31) and a push rod base (32). The push rod base (32) is fixedly connected to the air duct housing (200), and the drive end of the electric push rod (31) is fixedly installed on the push rod base (32). The driven component includes a fixed base (33) and at least one elastic element (34). The fixed base (33) is integrally or fixedly connected to the air duct (100). Each elastic element (34) is connected at one end to the push rod end of the electric push rod (31) and at the other end to the fixed base (33).

10. The range hood according to claim 9, characterized in that: An oil baffle (35) is provided on the outside of the drive end of the electric push rod (31).

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