Range hood and vehicle

Abstract

The application discloses a range hood and a vehicle, wherein the range hood comprises a box body, a fan and a first flow blocking ring, the box body is provided with a containing cavity, an air inlet and an air outlet which are communicated with the containing cavity, the fan is at least partially accommodated in the containing cavity, the fan comprises an impeller and a motor which is drivingly connected with the impeller, in the axial direction of the impeller, the projection of the impeller is located in the projection of the air inlet, and the projection of the impeller and the projection of the air inlet have a gap therebetween, and the first flow blocking ring is in the axial direction of the impeller, and the projection of the first flow blocking ring blocks the gap. The technical scheme of the application aims to reduce the backflow of gas as much as possible, so that the noise emitted by the range hood during operation is small, and the user experience is improved.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and particularly to a range hood and vehicle. Background Technology

[0002] Range hoods are used to remove cooking fumes. However, during operation, traditional range hoods generate backflow of gas inside the hood, which flows out through the air inlet. This backflow generates significant noise and reduces the user experience. Summary of the Invention

[0003] The main objective of this invention is to provide a range hood that minimizes backflow gas, thereby reducing the noise emitted during operation and improving the user experience.

[0004] To achieve the above objectives, the range hood proposed in this invention includes:

[0005] The housing has a receiving cavity and an air inlet and an air outlet that connect to the receiving cavity;

[0006] A fan, at least partially housed in the receiving cavity, includes an impeller and a motor drivenly connected to the impeller. Along the axial direction of the impeller, the projection of the impeller lies within the projection of the air inlet, and a gap exists between the projection of the impeller and the projection of the air inlet.

[0007] A first baffle ring, in the axial direction of the impeller, has its projection obscuring the gap.

[0008] Optionally, the impeller includes an impeller body connected to the motor drive and a second baffle ring connected to the outer periphery of the impeller body. The second baffle ring extends along the axial direction of the impeller, and the first baffle ring extends along the radial direction of the impeller. The inner ring of the first baffle ring is connected to the second baffle ring.

[0009] Optionally, the side of the first baffle ring opposite to the receiving cavity smoothly transitions to the inner ring of the second baffle ring.

[0010] Optionally, the inner ring of the first baffle ring extends into a guide arch ring protruding in a direction away from the motor, and the guide arch ring is connected to the second baffle ring.

[0011] Optionally, the first baffle ring is connected to the outer periphery of the impeller, and the first baffle ring and the housing define an air passage that communicates with the gap.

[0012] Optionally, the depth of the air passage along the axial direction of the impeller ranges from 3mm to 8mm.

[0013] Optionally, the first baffle ring, the second baffle ring, and the impeller are integrally formed.

[0014] Optionally, the enclosure includes a main body having the accommodating cavity and the air outlet, and a first housing detachably connected to the main body, the first housing having the air inlet, the air inlet being tapered toward the fan.

[0015] Optionally, the range hood further includes a motor bracket detachably connected to the outer surface of the housing, the motor bracket extending from the air inlet into the receiving cavity, and the motor being mounted on the motor bracket.

[0016] Optionally, the motor bracket is screwed onto the housing.

[0017] Optionally, the extension direction of the air inlet is different from the extension direction of the air outlet.

[0018] Optionally, the fan is configured as an axial flow fan.

[0019] The present invention also proposes a vehicle that includes the aforementioned range hood.

[0020] In the technical solution of this invention, the projection of the impeller is located within the projection of the air inlet along the axial direction of the impeller, and there is a gap between the projection of the impeller and the projection of the air inlet. It can be understood that backflow gas can flow out of the air inlet along the axial direction of the impeller through this gap. Therefore, a first baffle ring is provided. Along the axial direction of the impeller, the projection of the first baffle ring blocks this gap, thus blocking the backflow gas, increasing the difficulty for the backflow gas to flow out of the air inlet through this gap, suppressing the formation of backflow gas, and reducing backflow gas. This results in lower noise during the operation of the range hood, thereby improving the user experience. It is worth mentioning that the projection of the air inlet is annular, and the projection of the impeller is surrounded by the projection of the air inlet. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the range hood of the present invention;

[0023] Figure 2 for Figure 1 A three-dimensional sectional view of a center-draft range hood;

[0024] Figure 3 for Figure 1 A cross-sectional view of a central-range hood from one angle;

[0025] Figure 4 for Figure 1 A schematic diagram showing the connection between the middle impeller, the first baffle ring, and the second baffle ring;

[0026] Figure 5 for Figure 4 Three-dimensional sectional view of the impeller, the first baffle ring, and the second baffle ring.

[0027] Explanation of icon numbers:

[0028] 100 Range hood 400 Fan 300 Box 410 impeller 310 Box body 411 wheel hub 320 First shell 412 fan blades 330 Container cavity 420 First flow-blocking ring 340 air inlet 430 Second flow-blocking ring 350 air vent 440 Guide arch ring 360 Reflux gas channel 450 motor 361 air passage 500 Motor bracket 370 Air intake channel

[0029] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0034] Range hoods are used to remove cooking fumes. However, during operation, traditional range hoods generate backflow of gas from the air inlet, which produces significant noise and reduces user experience. To address this, this invention proposes a range hood that minimizes backflow, thereby reducing noise during operation and improving user experience.

[0035] Reference Figures 1 to 5 In one embodiment of the present invention, the range hood 100 includes:

[0036] The housing 300 is provided with a receiving cavity 330, and an air inlet 340 and an air outlet 350 communicating with the receiving cavity 330;

[0037] A fan 400 is at least partially housed in the receiving cavity 330. The fan 400 includes an impeller 410 and a motor 450 drivenly connected to the impeller 410. Along the axial direction of the impeller 410, the projection of the impeller 410 lies within the projection of the air inlet 340, and a gap exists between the projection of the impeller 410 and the projection of the air inlet 340.

[0038] The first baffle ring 420, along the axial direction of the impeller 410, has its projection obscuring the gap.

[0039] In the technical solution of this invention, the projection of the impeller 410 is located within the projection of the air inlet 340 along the axial direction of the impeller 410. There is a gap between the projection of the impeller 410 and the projection of the air inlet 340. It can be understood that the return gas can flow out from the air inlet 340 along the axial direction of the impeller 410 through this gap. For this purpose, a first baffle ring 420 is provided along the axial direction of the impeller 410.

[0040] The projection of the first baffle ring 420 blocks the gap, thus preventing backflow of gas and increasing the difficulty for it to flow out of the air inlet 340 through the gap. This suppresses the formation of backflow gas, reduces its amount, and consequently reduces the noise emitted by the range hood 100 during operation, thereby improving the user experience. It is worth noting that the projection of the air inlet 340 is ring-shaped, and the projection of the impeller 410 is surrounded by the projection of the air inlet 340.

[0041] It should be noted that, Figure 3 The non-solid arrows near the air inlet indicate the air intake direction, the non-solid arrows near the air outlet indicate the air outlet direction, and the solid arrows indicate the direction of the return air flow.

[0042] Although the first baffle ring 420 reduces the amount of recirculated gas, some of the recirculated gas may still come into contact with the first baffle ring 420 and flow along the wall of the first baffle ring 420 towards its inner ring. This flow, under the action of the fan 400, will then flow towards the fan 400, causing the fan 400 to cut through this portion of the recirculated gas, thus generating noise. Therefore, in one embodiment, the impeller 410 includes an impeller 410 body driven and connected to the motor 450, and a second baffle ring 430 connecting the outer periphery of the impeller 410 body. The second baffle ring 430 extends axially along the impeller 410, and the first baffle ring 420 extends radially along the impeller 410. The inner ring of the first baffle ring 420 is connected to the second baffle ring 430. In this way, the part of the return gas will flow along the wall of the first baffle ring 420 toward the outer ring of the first baffle ring 420, preventing the part of the return gas from flowing to the fan 400 under the suction of the fan 400, thereby preventing the part of the gas from being cut by the fan 400. This results in lower noise during the operation of the range hood 100 and improves the user experience.

[0043] It is understood that the first baffle ring 420 and the second baffle ring 430 are connected into a whole, which is ring-shaped. At this time, the whole restricts the air inlet 340 to form a return gas channel 360 for the flow of return gas and an air inlet channel 370 for the smoke to enter the accommodating cavity 330. The return gas channel 360 is outside the whole, and the air inlet channel 370 is inside the whole. In this way, the whole helps to block the return gas from flowing from the return gas channel 360 to the air inlet channel 370, and avoids the return gas being cut by the fan 400, thereby reducing the noise of the range hood 100 during operation.

[0044] Specifically, in one embodiment, the impeller 410 includes a hub 411 driven by a motor 450 and multiple fan blades 412 connected to the hub 411. The multiple fan blades 412 are spaced apart in the circumferential direction of the hub 411. It can be understood that without the second baffle ring 430, the return gas would easily enter between two adjacent fan blades 412, and the cutting of the return gas by each fan blade 412 would generate a large noise. Therefore, the tip of the fan blade 412 is connected to the inner ring of the second baffle ring 430. In this way, when the return gas flows radially along the impeller 410, it will first come into contact with the second baffle ring 430 and be blocked by the second baffle ring 430, preventing the return gas from continuing to flow toward the fan blades 412 and being cut by the fan blades 412. In addition, the connection of the tip of each fan blade 412 to the inner ring of the second baffle ring 430 also makes the structure of the fan 400 more robust.

[0045] It is worth mentioning that the multiple fan blades 412 here refers to three or more fan blades 412. In other embodiments, the fan blades 412 of the fan 400 can also be set to two depending on the actual situation.

[0046] Optionally, in one embodiment, the hub 411 is provided with multiple reinforcing ribs, which makes the hub 411 have high structural strength.

[0047] To ensure a high connection strength between the first baffle ring 420, the second baffle ring 430, and the impeller 410, in one embodiment, the first baffle ring 420, the second baffle ring 430, and the impeller 410 are integrally formed. Of course, in other embodiments, the first baffle ring 420, the second baffle ring 430, and the impeller 410 are detachably connected. When the first baffle ring 420, the second baffle ring 430, and the impeller 410 are damaged, the corresponding parts can be replaced to save maintenance costs.

[0048] Optionally, in one embodiment, the side of the first baffle ring 420 facing away from the receiving cavity smoothly transitions to the inner ring of the second baffle ring 430. In this way, the wall surface of the air inlet channel 370 is relatively smooth, which is beneficial for the flue gas to flow from the air inlet channel 370 into the receiving cavity 330 and reduce the noise generated when the flue gas flows.

[0049] Optionally, in one embodiment, the side of the first baffle ring 420 near the receiving cavity smoothly transitions to the outer ring of the second baffle ring 430. In this way, the wall surface of the return gas channel 360 is relatively smooth, which facilitates the smooth flow of return gas out of the air inlet 340 and reduces the noise generated when the return gas flows.

[0050] Optionally, in one embodiment, the inner ring of the first baffle ring 420 extends into a guide arch ring 440 protruding away from the motor 450. The guide arch ring 440 connects to the second baffle ring 430. Thus, the guide arch not only facilitates smoother flow of flue gas into the receiving cavity but also facilitates smoother flow of return gas out of the air inlet 340, greatly reducing the noise of the range hood 100 during operation and improving the user experience. Furthermore, the guide arch ring 440 is concave on the side near the return gas channel 360. When the return gas flows along this side of the guide arch ring 440, the guide arch ring 440 exerts a force on the return gas to flow into the receiving cavity, thus preventing subsequent return gas from flowing out of the air inlet 340 and further suppressing the formation of return gas.

[0051] Optionally, in one embodiment, the first baffle ring 420 is connected to the outer periphery of the impeller 410. The first baffle ring 420 and the housing 300 define an air passage 361 that connects to the gap. This air passage 361 extends the path of the return gas to the outside of the range hood 100. During the flow of the return gas through the air passage 361, the kinetic energy is greatly consumed. When the return gas flows out of the opening of the air passage 361, the velocity of the return gas is relatively low, reducing the whistling sound when the return gas flows out of the range hood 100. Specifically, in one embodiment, the first baffle ring 420 and the side of the housing 300 with the air inlet are arranged parallel to each other and spaced apart, thus defining the air passage 361. It is worth mentioning that the return gas passage 360 ​​mentioned above includes the air passage 361.

[0052] Optionally, in one embodiment, the depth of the air passage 361 along the axial direction of the impeller 410 is in the range of 3mm-8mm. If the depth is small, the first baffle ring 420 is likely to interfere with the housing 300. If the depth is large, it is not conducive to consuming the kinetic energy of the return gas. Therefore, when the depth is in the range of 3mm-8mm, the possibility of interference between the first baffle ring 420 and the housing 300 is avoided, and the kinetic energy of the return gas can be consumed.

[0053] Optionally, in one embodiment, the housing 300 includes a housing body 310 having the accommodating cavity 330 and the air outlet 350, and a first housing 320 detachably connected to the housing body 310. The first housing 320 has an air inlet 340 extending toward the accommodating cavity 330. This facilitates the separate molding of the housing body 310 and the first housing 320, making the housing 300 easier to process. Furthermore, the extension of the air inlet 340 toward the accommodating cavity 330 increases the travel distance of the return gas on the wall of the air inlet 340, thus consuming the kinetic energy of the return gas. However, this design is not limited to this; in other embodiments, the housing 300 and the first housing 320 can be integrally molded.

[0054] Optionally, in one embodiment, the range hood 100 further includes a motor bracket 500 detachably connected to the outer surface of the housing 300. The motor bracket 500 extends from the air inlet 340 into the receiving cavity 330, and the motor 450 is disposed on the motor bracket 500. Thus, the motor bracket 500 can be assembled to the housing 300 along the axial direction of the impeller 410, and the fan 400 can be assembled to the motor bracket 500, facilitating the assembly of the range hood 100. However, this design is not limited to this; in other embodiments, the motor bracket 500 is housed within the receiving cavity 330.

[0055] Specifically, in one embodiment, the housing body 310, the first housing 320, the motor bracket 500 and the fan 400 are sequentially assembled on the former along the axial direction of the fan 400, which is beneficial for the mass production of the range hood 100.

[0056] Optionally, in one embodiment, the motor bracket 500 is screwed onto the first housing 320, which greatly improves the connection stability between the motor bracket 500 and the housing 300. Specifically, in one embodiment, the motor bracket 500 includes a mounting base for mounting the motor 450 and support arms radially distributed on both sides of the mounting base. The support arms have a mounting portion screwed onto the first housing 320 and an extension portion connecting the mounting portion and the mounting base. The mounting portion extends radially along the impeller 410, and the extension portion extends axially along the impeller 410, passing through the air inlet 340. In this way, the motor bracket 500 hardly affects the air intake of the air inlet 340 while providing a mounting position for the fan 400. Of course, in other embodiments, considering the structural strength of the motor bracket 500 and the first housing 320, the motor bracket 500 can be fastened to the first housing 320.

[0057] It is worth mentioning that, in one embodiment, the extending direction of the air inlet 340 is different from that of the air outlet 350, which facilitates the design of the appearance of the housing 300 and increases the sales of the range hood 100. Of course, in other embodiments, the axis of the air inlet 340 passes through the air outlet 350 to allow the smoke to be quickly discharged from the receiving cavity 330.

[0058] Nowadays, many export-oriented range hoods 100 and vehicle-mounted range hoods 100 have lower static pressure requirements. In one embodiment, the fan 400 can be configured as an axial flow fan 400. Of course, in other embodiments, the fan 400 can also be configured as a mixed flow fan 400.

[0059] The present invention also proposes a vehicle comprising the aforementioned range hood 100. The specific structure of the range hood 100 is as described in the above embodiments. Since this vehicle adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. It is worth mentioning that this vehicle may be, but is not limited to, a motorhome.

[0060] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A range hood, characterized in that, include: The housing has a receiving cavity and an air inlet and an air outlet that connect to the receiving cavity; A fan, at least partially housed in the receiving cavity, includes an impeller and a motor drivenly connected to the impeller. Along the axial direction of the impeller, the projection of the impeller lies within the projection of the air inlet, and a gap exists between the projection of the impeller and the projection of the air inlet. A first baffle ring, in the axial direction of the impeller, the projection of the first baffle ring blocks the gap; The impeller includes an impeller body connected to the motor drive and a second baffle ring connected to the outer periphery of the impeller body. The second baffle ring extends along the axial direction of the impeller, and the first baffle ring extends along the radial direction of the impeller. The inner ring of the first baffle ring is connected to the second baffle ring. The inner ring of the first baffle ring extends into a guide arch ring protruding in a direction away from the motor. The guide arch ring is connected to the second baffle ring.

2. The range hood as described in claim 1, characterized in that, The side of the first baffle ring opposite to the accommodating cavity smoothly transitions to the inner ring of the second baffle ring.

3. The range hood as described in claim 1, characterized in that, The first baffle ring is connected to the outer periphery of the impeller, and the first baffle ring and the housing define an air passage that communicates with the gap.

4. The range hood as described in claim 3, characterized in that, The depth of the air passage along the axial direction of the impeller ranges from 3mm to 8mm.

5. The range hood as described in claim 1, characterized in that, The first baffle ring, the second baffle ring, and the impeller are integrally formed.

6. The range hood as described in claim 1, characterized in that, The enclosure includes a main body with the accommodating cavity and the air outlet, and a first housing detachably connected to the main body. The first housing has the air inlet, which tapers toward the fan.

7. The range hood as described in claim 1, characterized in that, The range hood also includes a motor bracket detachably connected to the outer surface of the housing, the motor bracket extending into the accommodating cavity from the air inlet, and the motor being mounted on the motor bracket.

8. The range hood as described in claim 7, characterized in that, The motor bracket is screwed onto the housing.

9. The range hood as described in claim 1, characterized in that, The direction of the air inlet is different from the direction of the air outlet.

10. The range hood according to any one of claims 1 to 9, characterized in that, The fan is configured as an axial flow fan.

11. A vehicle, characterized in that, Including the range hood as described in any one of claims 1 to 10.

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