Volute assembly and range hood

Abstract

The utility model relates to a volute assembly and a range hood. The volute assembly comprises a volute top plate and a volute cover plate, the volute front plate and the volute rear plate are arranged on the two opposite sides of the volute top plate at intervals in the first direction; the volute coaming is arranged between the volute front plate and the volute rear plate in the first direction and connected to the volute top plate, and the volute coaming, the volute front plate and the volute rear plate jointly define a containing cavity; the volute tongue body is arranged at the end, close to the volute top plate, of the volute surrounding plate and located in the containing cavity. According to the volute assembly and the volute tongue body arranged in the containing cavity, airflow can flow in the containing cavity more smoothly, so that noise generated by the airflow in the volute assembly can be effectively reduced, the working noise of the range hood provided with the volute assembly is reduced, and the use experience of the range hood is optimized.

Description

[0001] This application refers to Chinese Patent Application No. 202323400029.2, filed on December 13, 2023, entitled “Volcane Assembly and Range Hood”, which is incorporated herein by reference in its entirety. Technical Field

[0002] The present application relates to the technical field of kitchen appliances, and in particular to a volute assembly and a range hood. Background Art

[0003] With the development of science and technology and the improvement of people's living standards, people have higher and higher requirements for the cleanliness of their living environment and the comfort of their lives. As a commonly used kitchen appliance, the range hood (also known as the oil hood) can absorb the oil smoke generated during cooking and discharge it to the outside, effectively preventing users from inhaling too much oil smoke, thereby effectively improving people's comfort during cooking and effectively preventing excessive oil smoke from affecting users' health.

[0004] Centrifugal fans are widely used in range hoods as a component for air ducts. Centrifugal fans are usually fixed in the volute assembly. When the range hood is working, the centrifugal fan rotates driven by the motor, and the external atmosphere forms an airflow under the action of negative pressure and is sucked into the volute assembly. The rotation of the centrifugal fan drives the airflow to flow out from the top of the volute assembly along the direction of rotation of the wind wheel, and finally discharged into the public flue through the check valve and the exhaust pipe, thereby realizing the renewal of kitchen air.

[0005] However, during the operation of the range hood, due to the structural defects of the volute assembly, the airflow in the volute is still not smooth enough, and the range hood often generates a lot of noise during operation, thereby forming noise pollution that affects the user experience and reduces the user's cooking comfort. Therefore, how to reduce the operating noise of the range hood is one of the technical problems that technicians in this field have been working on. Summary of the invention

[0006] Based on this, it is necessary to provide a volute assembly and a range hood that can reduce the working noise in order to solve the problem of high working noise in range hoods.

[0007] A volute assembly, comprising:

[0008] volute top plate;

[0009] A volute front plate and a volute rear plate are arranged at intervals on opposite sides of the volute top plate in a first direction;

[0010] a volute enclosure plate, which is disposed between the volute front plate and the volute rear plate in the first direction and connected to the volute top plate, wherein the volute enclosure plate, the volute front plate and the volute rear plate together enclose a receiving chamber; and

[0011] A volute tongue body is provided at one end of the volute enclosure plate close to the volute top plate and is located in the accommodating cavity;

[0012] In which, the volute tongue body has a first guide surface facing away from the volute top plate and a second guide surface facing the volute top plate, the first guide surface extends longitudinally along the first direction, the second guide surface includes a first sub-guide surface close to the volute rear plate and a second sub-guide surface close to the volute front plate, the first sub-guide surface extends longitudinally along the first direction, and the second sub-guide surface extends obliquely toward the volute top plate from a side close to the volute rear plate to a side close to the volute front plate.

[0013] In one embodiment, a first edge line M1 is formed at the connection between the first sub-guide surface and the volute shroud, and a second edge line M2 is formed at the connection between the second sub-guide surface and the volute shroud; an angle formed between the first edge line M1 and the second edge line M2 is 120° to 165°.

[0014] In one of the embodiments, the length of the volute tongue in the first direction is equal to the width of the accommodating cavity in the first direction.

[0015] In one embodiment, a connection between the first sub-guiding surface and the volute shroud forms a first edge line M1, and a connection between the first sub-guiding surface and the volute shroud forms a third edge line M3; the first edge line M1 is parallel to the third edge line M3.

[0016] In one embodiment, the ratio of the length of the first edge line M1 to the length of the third edge line M3 is 0.5-0.65.

[0017] In one embodiment, the volute shroud comprises:

[0018] spiral part;

[0019] A first extension portion, one end of which is connected to one end of the spiral portion, and the other end of which is connected to one side of the top plate; and

[0020] A second extension portion, one end of which is connected to an end of the spiral portion away from the first extension portion, and the other end of which is connected to a side of the top plate away from the first extension portion;

[0021] The volute tongue body is arranged to protrude toward the accommodating cavity, the first guide surface is connected to the spiral portion, and the second guide surface is connected to the second extension portion.

[0022] In one embodiment, the volute enclosure includes a spiral portion, the first guide surface is connected to the spiral portion, the first guide surface is a curved surface recessed toward the second guide surface, and the curvature of the first guide surface is the same as the curvature of one end of the spiral portion connected to the first guide surface.

[0023] In one embodiment, the first sub-guiding surface and the second sub-guiding surface are both planes, and an angle formed by the first sub-guiding surface and the second sub-guiding surface is 143° to 175°.

[0024] In one of the embodiments, the angle formed between the second sub-guiding surface and a plane perpendicular to the first direction is 60° to 70°.

[0025] In one of the embodiments, the volute tongue body further includes an intermediate guide surface, which is connected between the first guide surface and the second guide surface and is an arc-shaped surface protruding toward the accommodating cavity.

[0026] In one embodiment, the intermediate flow guiding surface includes a first sub-intermediate flow guiding surface and a second sub-intermediate flow guiding surface, the first sub-intermediate flow guiding surface is connected between the first sub-flow guiding surface and the first flow guiding surface, and the second sub-intermediate flow guiding surface is connected between the second sub-flow guiding surface and the first flow guiding surface;

[0027] The first sub-middle guide surface extends longitudinally along the first direction, and the second sub-middle guide surface extends obliquely from a side close to the volute rear plate to a side close to the volute front plate in a direction away from the volute enclosure.

[0028] In one embodiment, the connection between the first sub-intermediate guide surface and the first sub-intermediate guide surface forms a fourth edge line M4, and the connection between the second sub-intermediate guide surface and the second sub-intermediate guide surface forms a fifth edge line M5; the angle formed between the fourth edge line M4 and the fifth edge line M5 is 120° to 165°.

[0029] In one embodiment, the arc formed by the first sub-intermediate guide surface in a cross section toward the outer wall of the accommodating cavity in the third direction has the same curvature and / or arc length as the arc formed by the second sub-intermediate guide surface in a cross section toward the outer wall of the accommodating cavity in the third direction.

[0030] In one of the embodiments, the volute enclosure is provided with at least two noise reduction holes.

[0031] In one of the embodiments, the diameter of the noise reduction hole is 6 mm-14 mm, and / or the minimum distance between the edges of two adjacent noise reduction holes is 8 mm-16 mm.

[0032] In one of the embodiments, the volute assembly further includes a sound absorbing member, and the sound absorbing member is coated on the outside of a side of the volute enclosure facing away from the accommodating chamber.

[0033] In one of the embodiments, a bonding layer is provided on the side of the sound absorbing member facing the volute enclosure, and the sound absorbing member is bonded to the volute enclosure through the bonding layer.

[0034] In one of the embodiments, the volute assembly further includes at least two fixing brackets, all of which span the sound absorbing component along the first direction and are connected to the volute enclosure.

[0035] A range hood comprises the above-mentioned volute assembly.

[0036] The above-mentioned volute assembly, the volute tongue body arranged in the accommodating cavity can make the airflow in the accommodating cavity flow more smoothly, thereby effectively reducing the noise generated by the airflow in the volute assembly, thereby reducing the working noise of the range hood equipped with the volute assembly, and optimizing the user experience of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of a volute assembly according to an embodiment of the present application.

[0038] Figure 2 It is a schematic diagram of a partial structure of a volute assembly according to an embodiment of the present application.

[0039] Figure 3 for Figure 2 A partial enlarged view of point A of the volute assembly shown.

[0040] Figure 4 It is a schematic structural diagram of the volute tongue body of the volute assembly according to one embodiment of the present application.

[0041] Figure 5 for Figure 4 A schematic structural diagram of the volute tongue body shown at another angle.

[0042] Figure 6 for Figure 4 A schematic structural diagram of the volute tongue body shown at another angle.

[0043] Figure 7 for Figure 3 A side view of the tongue of the volute is shown.

[0044] Figure 8 for Figure 3 A frontal schematic diagram of the lingual body of the volute is shown.

[0045] Fig. 9 for Figure 3 A schematic structural diagram of the volute tongue body shown at another angle.

[0046] Fig.10 for Figure 3 A schematic structural diagram of the volute tongue body shown at another angle.

[0047] Fig.11 This is a simulation diagram of the airflow in the volute assembly in the prior art.

[0048] Fig.12 This is a simulation diagram of the airflow in the volute assembly of the present application.

[0049] Fig.13 This is an exploded view of a volute assembly according to an embodiment of the present application.

[0050] Fig.14 It is a schematic diagram of assembling the sound absorbing component of the volute assembly according to one embodiment of the present application.

[0051] Description of reference numerals:

[0052] 100, volute assembly; 110, volute top plate; 110a, air outlet; 120, volute front plate; 120a, air inlet; 130, volute rear plate; 140, volute enclosure; 141, spiral portion; 141a, noise reduction hole; 143, first extension portion; 145, second extension portion; 150, volute tongue body; 152, first guide surface; 154, second guide surface; 1541, first sub-guide surface; 1543, second sub-guide surface; 156, intermediate guide surface; 160, sound absorbing member; 170, fixed bracket; 172, bracket body; 174, fixed portion. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0054] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0055] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0057] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0059] See also Figure 1 , Figure 1 The schematic diagram of the structure of the volute assembly in one embodiment of the present application is shown. The range hood provided in one embodiment of the present application (not shown) includes a volute assembly 100 and a centrifugal fan (not shown) installed in the volute assembly 100. When the range hood is working, the centrifugal fan rotates, and air is sucked into the volute assembly 100 from the external environment. The rotation of the centrifugal fan drives the airflow to flow out of the volute assembly 100 along its rotation direction, and then enters the public flue through the exhaust pipe, thereby exhausting the fumes in the kitchen and maintaining the cleanliness of the air in the kitchen.

[0060] It can be understood that the centrifugal fan and other components of the range hood do not belong to the main invention points of the present application, so they will not be described here in detail. The specific structures of these components can be set as needed to meet different requirements.

[0061] Please combine Figure 1 and Figure 2 As shown, the volute assembly 100 is a hollow shell structure, including a volute top plate 110, a volute front plate 120, a volute rear plate 130 and a volute enclosure 140. The volute top plate 110, the volute front plate 120, the volute rear plate 130 and the volute enclosure 140 are spliced ​​with each other to form a accommodating chamber for accommodating a centrifugal fan.

[0062] Specifically, the volute top plate 110 is located at the top of the volute assembly 100 and is a rectangular flat plate structure. In the following embodiments, the width direction of the volute top plate 110 is defined as the first direction (i.e. Figure 1 The length direction of the volute top plate 110 is the second direction (i.e. Figure 1 The thickness direction of the volute top plate 110 is the third direction (i.e. Figure 1 It can be understood that the shape of the volute top plate 110 is not limited and can be set as needed to meet different requirements.

[0063] The volute front plate 120 and the volute rear plate 130 are both flat plate structures perpendicular to the first direction. The volute front plate 120 and the volute rear plate 130 are spaced apart on opposite sides of the volute top plate 110 in the first direction, and are located on the same side of the volute top plate 110 in the third direction. Specifically, one end of the volute front plate 120 is connected to one side of the volute top plate 110 in the first direction, and the other end of the volute front plate 120 extends in the first direction away from the volute top plate 110, and one end of the volute rear plate 130 is connected to the other side of the volute top plate 110 in the first direction, and the other end of the volute rear plate 130 extends in the first direction away from the volute top plate 110.

[0064] The volute enclosure 140 is arranged between the volute front plate 120 and the volute rear plate 130 in the first direction and is connected to the volute top plate 110. The volute front plate 120 and the volute rear plate 130 are respectively connected to the two side edges of the volute enclosure 140 in the first direction, so that a accommodating cavity is formed between the volute enclosure 140, the volute front plate 120, the volute rear plate 130 and the volute top plate 110.

[0065] Specifically, in one embodiment, the volute enclosure 140 includes a spiral portion 141, a first extension portion 143, and a second extension portion 145. The spiral portion 141 is generally in a curved and extended spiral shape; one end of the first extension portion 143 is connected to one end of the spiral portion 141, and the other end of the first extension portion 143 extends in a direction close to the volute top plate 110 to connect to one side of the volute top plate 110 in the second direction; one end of the second extension portion 145 is connected to one end of the spiral portion 141 away from the first extension portion 143, and the other end of the second extension portion 145 extends in a direction close to the volute top plate 110 to connect to one side of the top plate away from the first extension portion 143 in the second direction.

[0066] Further, the volute front plate 120 and / or the volute rear plate 130 are provided with an air inlet 120a connecting the accommodating chamber and the external atmosphere, and the axial direction of the air inlet 120a extends along the first direction, and the volute top plate 110 is provided with an air outlet 110a connecting the accommodating chamber and the external atmosphere, and the axial direction of the air outlet 110a extends along the third direction. In this way, the airflow in the external environment can flow into the accommodating chamber from the air inlet 120a, and then flow out through the air outlet 110a driven by the centrifugal fan in the accommodating chamber.

[0067] Please combine Figure 2 and Figure 3 As shown, in the present application, in order to guide the airflow to flow smoothly and reduce the working noise of the range hood, the volute assembly 100 also includes a volute tongue body 150. The volute tongue body 150 is arranged at one end of the volute enclosure 140 close to the volute top plate 110 and is located in the accommodating cavity. Specifically, the volute tongue body 150 is protruding toward the accommodating cavity.

[0068] like Figures 3 to 7 As shown, the cross section of the volute tongue body 150 perpendicular to the first direction is generally in a "V" shape, and has a first guide surface 152 away from the volute top plate 110 and a second guide surface 154 facing the volute top plate 110. The first guide surface 152 extends longitudinally along the first direction; the second guide surface 154 includes a first sub-guide surface 1541 close to the volute rear plate 130 and a second sub-guide surface 1543 close to the volute front plate 120, the first sub-guide surface 1541 and the second sub-guide surface 1543 are connected to each other, the first sub-guide surface 1541 extends longitudinally along the first direction, and the second sub-guide surface 1543 extends obliquely toward the volute top plate 110 from the side close to the volute rear plate 130 to the side close to the volute front plate 120.

[0069] In this way, the volute tongue body 150 is divided into two sections with different shapes in the first direction. Specifically, the portion of the volute tongue body 150 close to the volute rear plate 130 in the first direction extends straightly along the first direction, that is, in the direction from the volute rear plate 130 to the volute front plate 120, as shown in FIG. Figure 3 As shown, the connection between the first sub-guiding surface 1541 and the volute shroud 140 forms a first edge line M1, and the connection between the first guiding surface 152 and the volute shroud 140 forms a third edge line M3, and the first edge line M1 is parallel to the third edge line M3. The connection between the second sub-guiding surface 1543 and the volute shroud 140 forms a second edge line M2, and the portion of the volute tongue 150 close to the volute front plate 120 in the first direction gradually increases in the direction from the volute rear plate 130 to the volute front plate 120.

[0070] As a preferred embodiment, the ratio of the length of the first edge line M1 to the length of the third edge line M3 is 0.5-0.65, preferably 0.5, 0.6 or 0.65, so as to have a better noise reduction effect.

[0071] See also Fig.11 and Fig.12 , Fig.11 This is a simulation effect diagram of the airflow in the receiving chamber provided with a "I"-shaped volute tongue in the prior art. Fig.12 This is a simulation effect diagram of the airflow in the accommodation cavity of this application. It should be noted that: Fig.11 and Fig.12 It only reflects the flow of airflow, but cannot reflect the specific structure of the volute assembly. Fig.11 and Fig.12 The shape of the volute assembly of the prior art and the present application is obtained.

[0072] Through the above simulation tests, it can be known that the volute tongue body 150 of the present application can make the airflow flow in the accommodating cavity smoother, thereby effectively reducing the noise generated by the airflow in the volute assembly 100, thereby reducing the working noise of the range hood equipped with the volute assembly 100 and optimizing the user experience of the range hood.

[0073] Furthermore, the volute tongue body 150 further includes an intermediate guide surface 156, which is connected between the first guide surface 152 and the second guide surface 154 and is an arc-shaped surface convex toward the accommodating cavity, and the first guide surface 152 and the second guide surface 154 smoothly transition through the intermediate guide surface 156. Furthermore, the side of the first guide surface 152 away from the intermediate guide surface 156 is connected to the spiral portion 141 and smoothly transitions, and the side of the second guide surface 154 away from the intermediate guide surface 156 is connected to the second extension portion 145, so that the flow of airflow is smoother.

[0074] In some embodiments, Figure 8 As shown, the length L1 of the volute tongue body 150 in the first direction is equal to the width of the accommodation chamber in the first direction, one end face of the volute tongue body 150 in the first direction abuts against the volute rear plate 130, and the other end face of the volute tongue body 150 in the first direction abuts against the volute front plate 120, so the airflow entering the accommodation chamber from the air inlet 120a must flow out through the volute tongue body 150, thereby ensuring the noise reduction effect of the volute tongue body 150. It can be understood that in some other embodiments, the length L1 of the volute tongue body 150 in the first direction may also be less than the width of the accommodation chamber in the first direction.

[0075] In some embodiments, Figure 3 and Figure 7 As shown, the first sub-guiding surface 1541 is connected to the edge of the volute shroud 140 and extends in a straight line, the second sub-guiding surface 1543 is connected to the edge of the volute shroud 140 and extends in a straight line, the first sub-guiding surface 1541 and the volute shroud 140 are connected to form a first edge line M1, and the second sub-guiding surface 1543 and the volute shroud 140 are connected to form a second edge line M2, and the angle α formed between the first edge line M1 and the second edge line M2 is 120° to 165°, preferably 120° or 156° or 165°, so as to achieve a better noise reduction effect. It can be understood that the size of the angle α formed between the first edge line M1 and the second edge line M2 is not limited to this, and can be set as needed to match different volute assemblies 100, so as to achieve the best noise reduction effect.

[0076] Furthermore, in some embodiments, the first guide surface 152 is a curved surface recessed toward the second guide surface 154, the bending direction of the first guide surface 152 is consistent with the bending direction of the spiral portion 141, the cross-section of the first guide surface 152 perpendicular to the first direction is an arc-shaped surface, and the curvature of the first guide surface 152 is the same as the curvature of one end of the spiral portion 141 connected to the first guide surface 152.

[0077] In some embodiments, the first sub-guiding surface 1541 and the second sub-guiding surface 1543 are both planes, and the angle formed by the first sub-guiding surface 1541 and the second sub-guiding surface 1543 is 143° to 175°, preferably 143°, 168° or 175°. Fig.10 As shown, the included angle γ formed between the second sub-guiding surface 1543 and the plane perpendicular to the first direction is 60° to 70°, preferably 60°, 65° or 70°. Fig.10 In the figure, plane L is a plane perpendicular to the first direction, and plane M is a plane where the second sub-guiding surface 1543 is located. Plane L and plane M intersect at a straight line P, and an angle γ is formed between plane L and plane M, that is, angle γ is an angle formed between the second sub-guiding surface 1543 and the plane perpendicular to the first direction.

[0078] In other embodiments, the first sub-guide surface 1541 and the second sub-guide surface 1543 are both curved surfaces concave toward the first guide surface 152, the cross-section of the first guide surface 152 perpendicular to the first direction is an arc-shaped surface, and the curvature of the first sub-guide surface 1541 is the same as the curvature of one end of the second extension portion 145 connected to the first sub-guide surface 1541.

[0079] See also Figure 8 , Fig. 9 and Fig.11 In some embodiments, the intermediate guide surface 156 extends longitudinally along the first direction. In other embodiments, the intermediate guide surface 156 includes a first sub-intermediate guide surface 1561 close to the volute rear plate 130 and a second sub-intermediate guide surface 1563 close to the volute front plate 120, the first sub-intermediate guide surface 1561 is connected between the first sub-guide surface 1541 and the first guide surface 152, and the second sub-intermediate guide surface 1563 is connected between the second sub-guide surface 1543 and the first guide surface 152. Among them, the first sub-intermediate guide surface 1561 extends longitudinally along the first direction, and the second sub-intermediate guide surface 1563 extends obliquely from the side close to the volute rear plate 130 to the side close to the volute front plate 120 in the direction away from the volute shroud 140, so as to have a better noise reduction effect.

[0080] As a preferred embodiment, the connection between the first sub-intermediate guide surface 1561 and the first sub-guide surface 1541 forms a fourth edge line M4, and the connection between the second sub-intermediate guide surface 1563 and the second sub-guide surface 1543 forms a fifth edge line M5. The angle β formed between the fourth edge line M4 and the fifth edge line M5 is preferably 120° to 165°, preferably 120° or 145° or 165°.

[0081] In some embodiments, the arc formed by the first sub-middle guide surface 1561 in the cross-section toward the outer wall of the accommodating cavity in the third direction has the same arc angle and / or arc length as the arc formed by the second sub-middle guide surface 1563 in the cross-section toward the outer wall of the accommodating cavity in the third direction, thereby facilitating smooth flow of airflow.

[0082] See also Fig.13 and Fig.14 In some embodiments, the volute shroud 140 is provided with at least two noise reduction holes 141a, each of which penetrates the volute shroud 140 along the thickness direction of the volute shroud 140. The volute assembly 100 further includes a sound absorbing member 160, which is coated on the side of the volute shroud 140 facing away from the accommodating cavity. In this way, the noise generated in the accommodating cavity can enter the sound absorbing member 160 through the noise reduction holes 141a and then be absorbed by the sound absorbing member 160, thereby further reducing the working noise of the volute assembly 100.

[0083] Specifically in one embodiment, all the noise reduction holes 141a are opened in the spiral portion 141 of the volute shroud 140 and cover the entire spiral portion 141, and all the noise reduction holes 141a are arranged in a matrix, each noise reduction hole 141a is circular, and the aperture of each noise reduction hole 141a is 6mm-14mm, preferably 6mm or 10mm or 14mm, and the minimum distance between the edges of two adjacent noise reduction holes 141a is 14mm, preferably 8mm or 14mm or 16mm. It can be understood that the opening position, arrangement, number, shape and size of the noise reduction holes 141a can be set as needed to meet different noise reduction requirements and the structural strength of the volute shroud 140.

[0084] The sound absorbing member 160 is formed of a soft porous material such as sound absorbing cotton. The sound absorbing member 160 is circumferentially wrapped around the outer side of the volute enclosure 140 and covers the entire area of ​​the volute enclosure 140 . Therefore, the sound waves propagating from the noise reduction holes 141 a can enter the sound absorbing member 160 and be absorbed by the sound absorbing member 160 .

[0085] Further, in some embodiments, a bonding layer (not shown) formed by a bonding agent is provided on the side of the sound absorbing member 160 facing the volute shroud 140, so that the sound absorbing member 160 is bonded to the volute shroud 140 through the bonding layer. As a preferred embodiment, the volute assembly 100 also includes at least two fixing brackets 170, all of which are arranged at intervals in the circumferential direction of the volute shroud 140, and all of the fixing brackets 170 span the sound absorbing member 160 along the first direction and are matched to the volute shroud 140, thereby preventing the sound absorbing member 160 from falling off the volute shroud 140. Specifically in one embodiment, the volute assembly 100 includes five fixing brackets 170. It can be understood that the number of fixing brackets 170 is not limited, and can be set as needed to meet the fixing requirements of sound absorbing members 160 of different sizes.

[0086] Specifically, in some embodiments, the fixed bracket 170 includes a bracket body 172 and a fixing portion 174 protruding from both ends of the bracket body 172. The two fixing portions 174 are respectively fixed to the opposite side edges of the volute enclosure 140 in the first direction by fasteners such as screws. The bracket body 172 extends along the first direction to cross the sound absorbing component 160.

[0087] The above-mentioned volute assembly 100 and the range hood equipped with the same, on the one hand, make the airflow in the volute assembly 100 flow more smoothly through the special shape of the volute tongue body 150, thereby effectively reducing the working noise of the volute assembly 100; on the other hand, by opening a noise reduction hole 141a on the volute enclosure 140 and covering the outside of the volute enclosure 140 with a sound-absorbing member, the noise is effectively prevented from propagating outward, thereby further reducing the working noise of the volute assembly 100. Therefore, the range hood using the volute assembly 100 also has lower working noise, thereby improving the user experience of the range hood.

[0088] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A volute assembly, characterized in that: include: A volute top plate (110); A volute front plate (120) and a volute rear plate (130) are arranged at intervals on opposite sides of the volute top plate (110) in a first direction; a volute enclosure (140), which is disposed between the volute front plate (120) and the volute rear plate (130) in the first direction and connected to the volute top plate (110), wherein the volute enclosure (140), the volute front plate (120) and the volute rear plate (130) together enclose a receiving cavity; and A volute tongue (150) is provided at one end of the volute enclosure (140) close to the volute top plate (110) and is located in the accommodating chamber; The volute tongue body (150) has a first guide surface (152) facing away from the volute top plate (110) and a second guide surface (154) facing the volute top plate (110), the first guide surface (152) extending longitudinally along the first direction, the second guide surface (154) including a first sub-guide surface (1541) close to the volute rear plate (130) and a second sub-guide surface (1543) close to the volute front plate (120), the first sub-guide surface (1541) extending longitudinally along the first direction, the second sub-guide surface (1543) extending obliquely toward the volute top plate (110) from a side close to the volute rear plate (130) to a side close to the volute front plate (120).

2. The volute assembly according to claim 1, characterized in that: A first edge line M1 is formed at the connection between the first sub-guide surface (1541) and the volute shroud (140), and a second edge line M2 is formed at the connection between the second sub-guide surface (1543) and the volute shroud (140); an angle formed between the first edge line M1 and the second edge line M2 is 120° to 165°.

3. The volute assembly according to claim 1, characterized in that: The length of the volute tongue body (150) in the first direction is equal to the width of the accommodating cavity in the first direction.

4. The volute assembly according to claim 1, characterized in that: A first edge line M1 is formed at a connection between the first sub-guiding surface (1541) and the volute shroud (140), and a third edge line M3 is formed at a connection between the first guide surface (152) and the volute shroud (140); the first edge line M1 is parallel to the third edge line M3.

5. The volute assembly according to claim 4, characterized in that: The ratio of the length of the first edge line M1 to the length of the third edge line M3 is 0.5-0.

65.

6. The volute assembly according to claim 1, characterized in that: The volute shroud (140) comprises: Helical portion (141); A first extension portion (143), one end of which is connected to one end of the spiral portion (141), and the other end of which is connected to one side of the top plate; and A second extension portion (145), one end of which is connected to an end of the spiral portion (141) away from the first extension portion (143), and the other end of which is connected to a side of the top plate away from the first extension portion (143); The volute tongue body (150) is arranged to protrude toward the accommodating cavity, the first guide surface (152) is connected to the spiral portion (141), and the second guide surface (154) is connected to the second extension portion (145).

7. The volute assembly according to claim 1, characterized in that: The volute shroud (140) comprises a spiral portion (141), the first flow guide surface (152) is connected to the spiral portion (141), the first flow guide surface (152) is a curved surface recessed toward the second flow guide surface (154), and the curvature of the first flow guide surface (152) is the same as the curvature of one end of the spiral portion (141) connected to the first flow guide surface (152).

8. The volute assembly according to claim 1, characterized in that: The first sub-guiding surface (1541) and the second sub-guiding surface (1543) are both planes, and the angle formed by the first sub-guiding surface (1541) and the second sub-guiding surface (1543) is 143° to 175°.

9. The volute assembly according to claim 1, characterized in that: The angle formed between the second sub-guiding surface (1543) and a plane perpendicular to the first direction is 60° to 70°.

10. The volute assembly according to claim 1, characterized in that: The volute tongue body (150) further comprises an intermediate flow guiding surface (156), wherein the intermediate flow guiding surface (156) is connected between the first flow guiding surface (152) and the second flow guiding surface (154) and is an arc-shaped surface protruding toward the accommodating cavity.

11. The volute assembly according to claim 10, characterized in that: The intermediate flow guide surface (156) comprises a first sub-intermediate flow guide surface (1561) and a second sub-intermediate flow guide surface (1563), wherein the first sub-intermediate flow guide surface (1561) is connected between the first sub-flow guide surface (1541) and the first flow guide surface (152), and the second sub-intermediate flow guide surface (1563) is connected between the second sub-flow guide surface (1543) and the first flow guide surface (152); The first sub-intermediate guide surface (1561) extends longitudinally along the first direction, and the second sub-intermediate guide surface (1563) extends obliquely from a side close to the volute rear plate (130) to a side close to the volute front plate (120) in a direction away from the volute enclosure (140).

12. The volute assembly according to claim 11, characterized in that: The connection between the first sub-intermediate guide surface (1561) and the first sub-guide surface (1541) forms a fourth edge line M4, and the connection between the second sub-intermediate guide surface (1563) and the second sub-guide surface (1543) forms a fifth edge line M5; the angle formed between the fourth edge line M4 and the fifth edge line M5 is 120° to 165°.

13. The volute assembly according to claim 11, characterized in that: The arc formed by the first sub-intermediate guide surface (1561) in the cross section toward the outer wall of the accommodating cavity in the third direction has the same curvature and / or arc length as the arc formed by the second sub-intermediate guide surface (1563) in the cross section toward the outer wall of the accommodating cavity in the third direction.

14. The volute assembly according to any one of claims 1 to 13, characterized in that: The volute enclosure (140) is provided with at least two noise reduction holes (141a).

15. The volute assembly according to claim 14, characterized in that: The aperture of the noise reduction hole (141a) is 6 mm to 14 mm, and / or the minimum distance between the edges of two adjacent noise reduction holes (141a) is 8 mm to 16 mm.

16. The volute assembly according to claim 14, characterized in that: The volute assembly further comprises a sound absorbing member (160), wherein the sound absorbing member (160) is coated on the outside of a side of the volute enclosure (140) facing away from the accommodating cavity.

17. The volute assembly according to claim 16, characterized in that: A bonding layer is provided on the side of the sound absorbing member facing the volute shroud (140), and the sound absorbing member (160) is bonded to the volute shroud (140) via the bonding layer.

18. The volute assembly according to claim 16, characterized in that: The volute assembly further comprises at least two fixing brackets (170), all of which span the sound absorbing member (160) along the first direction and are matched to the volute enclosure (140).

19. A range hood, characterized in that: Comprising a volute assembly as claimed in any one of claims 1 to 18.

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