Volute fan and integrated cooker

Abstract

The utility model belongs to the technical field of integrated kitchen range components, and discloses a volute fan and an integrated kitchen range, the volute fan comprises an impeller, a coaming and a volute tongue, the coaming is arranged on the periphery of the impeller in a volute mode, the coaming is disconnected end to end, the volute tongue is located at the upstream end of the coaming in the rotating direction of the impeller, the coaming, the volute tongue and the impeller jointly define an air flue, the air flue is in a volute shape, and the volute tongue is located in the air flue. The volute tongue comprises a shell and partition plates, the shell is hollow, the partition plates are arranged in a cavity of the shell and divide the cavity into a plurality of cavities, a plurality of through holes are formed in the windward side of the shell, and any cavity is communicated with the through hole. On one hand, a micropore noise reduction structure is formed on the windward side of the volute tongue, on the other hand, a plurality of cavities are formed in the volute tongue, so that a plurality of resonant cavities are formed, and through holes are formed in the surface of the volute tongue and communicate with the resonant cavities. Noise generated when airflow collides with the volute tongue can be effectively reduced, and then the use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of integrated stove components, in particular to a volute fan and an integrated stove. Background Art

[0002] Integrated stove, also known as environmentally friendly stove or integrated environmentally friendly stove, is a kitchen appliance that integrates multiple functions such as smoke extractor, gas stove, disinfection cabinet, storage cabinet, etc. It has the advantages of saving space, good fume extraction effect, energy saving, low consumption and environmental protection.

[0003] Among them, the smoke extractor is used to extract the oil smoke during the cooking process, so as to avoid affecting the health of the user and reduce the oil smoke attached to the kitchen utensils and kitchen walls. The smoke extractor includes a fan, which is used to quickly extract the oil smoke during the cooking process and discharge it outdoors. In the prior art, the fan is generally a centrifugal volute fan, which includes an impeller and a shroud, and the impeller and the shroud are arranged to form a volute air duct. A volute tongue is arranged near the air outlet of the volute air duct. When the impeller is rotated so that the airflow in the volute air duct passes near the volute tongue, the volute tongue divides the airflow into two, most of which flows along the volute air duct to the air outlet, and a small part of the airflow flows back between the shroud and the impeller through the gap between the volute tongue and the impeller, and returns to the volute tongue after rotating one circle with the impeller between the shroud and the impeller to participate in the new diversion. For the volute fan in the prior art, a large noise will be generated when the airflow collides with the volute tongue, thereby affecting the user's experience.

[0004] Therefore, the above problems need to be solved urgently. Utility Model Content

[0005] The utility model aims to provide a volute fan and an integrated stove, so as to reduce the noise generated when the airflow collides with the volute tongue, thereby improving the user experience.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] On the one hand, the utility model provides a volute fan, including an impeller and a surrounding plate, wherein the surrounding plate is in a volute shape and is arranged around the outer circumference of the impeller, and the surrounding plate is disconnected at the ends. The volute fan also includes a volute tongue, which is located at the upstream end of the surrounding plate along the rotation direction of the impeller. The surrounding plate, the volute tongue and the impeller jointly form an air duct, and the volute tongue includes a shell and a partition, the shell is hollow, the partition is arranged in the cavity of the shell and divides the cavity into a plurality of chambers, and a plurality of through holes are arranged on the windward surface of the shell, and any one of the chambers is connected to the through holes.

[0008] Preferably, the housing comprises a first plate portion, a second plate portion and a third plate portion, wherein along the rotation direction of the impeller, the first plate portion extends from the upstream end of the shroud to the downstream end of the shroud, the second plate portion is arranged at an end of the first plate portion away from the upstream end of the shroud, the third plate portion is arranged at an end of the second plate portion away from the first plate portion, and the second plate portion and the third plate portion are both provided with the through hole;

[0009] The cross-section formed by cutting the second plate portion along the first surface is arc-shaped and protrudes toward the air duct. The first surface is perpendicular to the axial direction of the impeller. The surface of the first plate portion facing the air duct is tangent to the surface of the second plate portion facing the air duct. The surface of the third plate portion facing the air duct is tangent to the surface of the second plate portion facing the air duct.

[0010] Preferably, the second plate portion extends along a spiral line of the enclosure.

[0011] Preferably, an air outlet is formed at the downstream end of the air duct, and an angle between an edge line of a cross section formed by cutting the third plate portion along the first surface toward the air duct and a plane where the air outlet is located is 75°.

[0012] Preferably, the normal cross-section of the third plate portion is arc-shaped and convex toward a side away from the air duct.

[0013] Preferably, the impeller comprises a plurality of blades, the plurality of blades are evenly arranged in the circumferential direction, and the chord height of the normal cross section of the third plate portion is greater than the distance between two adjacent blades.

[0014] Preferably, the snail tongue is embedded in the enclosure.

[0015] Preferably, one of the enclosure and the volute tongue is provided with at least two plug-ins, and the other of the enclosure and the volute tongue is provided with at least two insertion holes, and at least two of the plug-ins are inserted into the at least two insertion holes one by one.

[0016] Preferably, any one of the chambers is connected to a plurality of the through holes.

[0017] On the other hand, the utility model further provides an integrated stove, comprising the volute fan as described above.

[0018] Beneficial effects of the utility model: In the utility model, on the one hand, a microporous noise reduction structure is formed on the windward surface of the volute tongue. When the sound wave enters the through hole, due to the friction and damping of the hole wall, a considerable part of the sound energy is lost due to heat consumption. On the other hand, a plurality of chambers are arranged inside the volute tongue, thereby forming a plurality of resonance cavities. Through holes are arranged on the surface of the volute tongue to reach each resonance cavity, so as to form a resonance cavity muffler on the volute tongue, and then the resonance transmission and destructive interference principle of sound waves in the closed cavity are used to suppress noise. The utility model can effectively reduce the noise generated when the airflow collides with the volute tongue, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded view of the volute fan except the impeller in the embodiment of the utility model;

[0020] Figure 2 is a cross-sectional view of the volute fan in the embodiment of the utility model along a cross section perpendicular to the axial direction of the impeller;

[0021] Figure 3 yes Figure 2 A partial enlarged view of the R in the middle;

[0022] Figure 4 It is one of the structural schematic diagrams of the volute tongue in the embodiment of the utility model;

[0023] Figure 5 This is the second structural schematic diagram of the volute tongue in the embodiment of the utility model;

[0024] Figure 6 This is the third structural schematic diagram of the volute tongue in the embodiment of the utility model;

[0025] Figure 7 is along Figure 6 Sectional view along line AA;

[0026] Figure 8 is a top view of the volute tongue in the embodiment of the utility model;

[0027] Fig. 9 is along Figure 8 Sectional view along line BB.

[0028] In the figure:

[0029] 1. Impeller; 11. Blades; 2. Enclosure; 21. Plug hole; 3. Volute tongue; 31. Shell; 311. Through hole; 312. First plate portion; 313. Second plate portion; 314. Third plate portion; 315. Fourth plate portion; 316. Fifth plate portion; 32. Partition; 33. Chamber; 34. Plug plate; 4. Air outlet. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] The present embodiment provides an integrated stove, which includes an integrated stove main unit, an integrated stove head and a volute fan. The integrated stove main unit is integrated with a stove top, the integrated stove head is installed on the integrated stove main unit, a smoke exhaust port is provided on the integrated stove head, the smoke exhaust port is located above the stove top, and the volute fan is connected to the smoke exhaust port, so that the fumes generated during the cooking process can be drawn away and discharged outdoors.

[0035] It can be understood that in the present embodiment, the volute fan is placed outside the integrated stove main unit and away from the integrated stove main unit, thereby reducing the impact of the noise generated by the volute fan on the user, thereby helping to improve the user experience. Of course, in other optional embodiments, the volute fan can also be integrated inside the integrated stove main unit, and this embodiment does not make specific restrictions on this.

[0036] See also Figures 1 to 9 The volute fan in this embodiment includes an impeller 1 and a shroud 2. The impeller 1 includes a plurality of blades 11, which are evenly arranged in the circumferential direction. The shroud 2 is volute-shaped and is wound around the outer circumference of the impeller 1. The shroud 2 is disconnected at the head and tail. In addition to the impeller 1 and the shroud 2, the volute fan also includes a volute tongue 3. The volute tongue 3 is located at the upstream end of the shroud 2 along the rotation direction of the impeller 1. The shroud 2, the volute tongue 3 and the impeller 1 together form an air duct. The air duct is volute-shaped. The volute tongue 3 includes a shell 31 and a partition 32. The shell 31 is hollow. The partition 32 is arranged in the cavity of the shell 31 and divides the cavity into a plurality of chambers 33. The windward surface of the shell 31 is provided with a plurality of through holes 311, and any chamber 33 is connected with the through hole 311.

[0037] Based on the above, on the one hand, a microporous noise reduction structure is formed on the windward surface of the volute tongue 3. When the sound wave enters the through hole 311, due to the friction and damping of the hole wall, a considerable part of the sound energy is lost due to heat consumption. On the other hand, a plurality of chambers 33 are arranged inside the volute tongue 3, thereby forming a plurality of resonance cavities. The surface of the volute tongue 3 is provided with through holes 311 to reach each resonance cavity, so as to form a resonance cavity muffler on the volute tongue 3, and then the resonance transmission and destructive interference principle of the sound wave in the closed cavity is used to suppress the noise. This embodiment can effectively reduce the noise generated when the airflow collides with the volute tongue 3, thereby improving the user experience.

[0038] Preferably, any chamber 33 is connected to a plurality of through holes 311 , thereby further effectively reducing the noise generated when the airflow collides with the volute tongue 3 , thereby further improving the user experience.

[0039] In this embodiment, the shell 31 preferably includes a first plate portion 312, a second plate portion 313 and a third plate portion 314. It can be understood that the shell 31 also includes a fourth plate portion 315 and a fifth plate portion 316 which are arranged opposite to each other along the axial direction of the impeller 1. The first plate portion 312, the second plate portion 313 and the third plate portion 314 are all installed between the fourth plate portion 315 and the fifth plate portion 316, so that a cavity is formed between the first plate portion 312, the second plate portion 313, the third plate portion 314, the fourth plate portion 315 and the fifth plate portion 316, and the partition 32 is installed between the first plate portion 312, the second plate portion 313, the third plate portion 314, the fourth plate portion 315 and the fifth plate portion 316, so as to divide the cavity into several chambers 33.

[0040] Along the rotation direction of the impeller 1, the first plate portion 312 extends from the upstream end of the enclosure 2 to the downstream end of the enclosure 2, and the second plate portion 313 is arranged at one end of the first plate portion 312 away from the upstream end of the enclosure 2. The cross section of the second plate portion 313 formed by cutting along the first surface is arc-shaped and convex toward the air duct. The first surface is perpendicular to the axial direction of the impeller 1. In other words, Figure 6 and Figure 7 As shown, the second plate portion 313 is along Figure 6 The cross-section formed after cutting along the middle AA line is arc-shaped, that is, the second plate portion 313 is bent toward the side away from the air duct to form a tongue tip, and the third plate portion 314 is located at the end of the second plate portion 313 away from the first plate portion 312. The surfaces of the second plate portion 313 and the third plate portion 314 facing the air duct form the windward surface of the volute tongue 3. Therefore, in this embodiment, through holes 311 are provided on the second plate portion 313 and the third plate portion 314, thereby forming a microporous noise reduction structure on the windward surface of the volute tongue 3.

[0041] In addition, the surface of the first plate portion 312 facing the air duct is tangent to the surface of the second plate portion 313 facing the air duct, and the surface of the third plate portion 314 facing the air duct is tangent to the surface of the second plate portion 313 facing the air duct, that is, the connection between the first plate portion 312 and the second plate portion 313 and the connection between the second plate portion 313 and the third plate portion 314 are all smoothly transitioned. Since the connection between the first plate portion 312 and the second plate portion 313 and the connection between the second plate portion 313 and the third plate portion 314 are all smoothly transitioned, therefore, in this embodiment, it can be ensured that when the airflow passes over the volute tongue 3 and is diverted by the volute tongue 3, the surface of the volute tongue 3 will not block the flow of the airflow, thereby further reducing the noise generated when the airflow collides with the volute tongue 3, thereby further improving the user experience.

[0042] Based on the above, preferably, the second plate portion 313 extends along the spiral line of the enclosure 2, thereby ensuring that the airflow flowing back between the enclosure 2 and the impeller 1 through the gap between the volute tongue 3 and the impeller 1 can flow smoothly between the enclosure 2 and the impeller 1 without obstruction, thereby further reducing noise and further improving the user experience.

[0043] Please continue reading Figures 1 to 9 In this embodiment, the downstream end of the air duct forms an air outlet 4, and the angle between the edge line of the cross section formed by cutting the third plate portion 314 along the first surface toward the air duct and the plane where the air outlet 4 is located is α, and α is equal to 75°. Specifically, Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, for the third plate portion 314 along Figure 6The cross section formed after the AA line is cut, the angle between the edge line of the cross section facing the air duct and the plane where the air outlet 4 is located is α, α is equal to 75°, in other words, the angle between the edge line of the cross section formed after the third plate portion 314 is cut along the first surface and the surface of the downstream side of the enclosure 2 facing the air duct along the rotation direction of the impeller 1 is 5°. Based on the above, in this embodiment, the volute tongue 3 is placed at an angle. Since the size of the noise generated when the airflow collides with the volute tongue 3 is related to the area of ​​the windward surface of the volute tongue 3, in this embodiment, the volute tongue 3 is arranged at an angle to reduce the area of ​​the surface where the airflow impact force acts, thereby further reducing the noise generated when the airflow collides with the volute tongue 3, and further improving the user experience.

[0044] Furthermore, if Fig. 9 As shown, combined with Figures 2 to 8 The normal section of the third plate portion 314 is an arc-shaped section and convex toward the side away from the air duct. The normal section of the third plate portion 314 is a section formed after the third plate portion 314 is cut along the second surface. The second surface is perpendicular to the surface of the third plate portion 314 facing the air duct. Specifically, the normal section of the third plate portion 314 is a section formed after the third plate portion 314 is cut along the second surface. Figure 8 The cross-section formed after cutting along the middle BB line is arc-shaped and bulges toward the side away from the air duct. Since the surface of the third plate portion 314 facing the air duct is tangent to the surface of the second plate portion 313 facing the air duct, the surface of the second plate portion 313 facing the air duct is also an arc-shaped surface and bulges toward the side away from the air duct, so that the airflow acting on the snail tongue 3 is phase-staggered. In other words, the airflow acting on the snail tongue 3 will first contact the convex parts of the surfaces of the second plate portion 313 and the third plate portion 314 facing the air duct, and then gradually contact the concave parts of the surfaces of the second plate portion 313 and the third plate portion 314 facing the air duct, thereby reducing the impact force on the snail tongue 3, and further reducing the noise generated when the airflow collides with the snail tongue 3, so as to further enhance the user experience.

[0045] In addition, based on the content mentioned above, the impeller 1 in this embodiment includes a plurality of blades 11, and the plurality of blades 11 are evenly arranged along the circumferential direction. During the rotation of the impeller 1, the airflow will be thrown out from between two adjacent blades 11 and enter the air duct. Therefore, in this embodiment, the airflow acting on the volute tongue 3 is a pulsed airflow.

[0046] In this embodiment, the chord height of the normal section of the third plate portion 314 is H, and H is greater than the spacing between two adjacent blades 11, so that two adjacent pulse airflows will collide with the snail tongue 3 successively, that is, the two adjacent pulse airflows will contact the snail tongue 3 in an offset manner. Specifically, based on the above, the airflow acting on the snail tongue 3 will first contact the protruding parts of the surface of the second plate portion 313 and the third plate portion 314 facing the air duct, and then gradually contact the recessed parts of the surface of the second plate portion 313 and the third plate portion 314 facing the air duct. Only after the previous pulse airflow is completely in contact with the snail tongue 3, the next pulse airflow will begin to gradually contact the snail tongue 3, thereby further reducing the impact force on the snail tongue 3, and then further reducing the noise generated when the airflow collides with the snail tongue 3, so as to further enhance the user experience.

[0047] It is worth noting that, in the present embodiment, the volute tongue 3 is embedded in the enclosure 2 , so that the volute tongue 3 can be easily disassembled and assembled, and the volute tongue 3 can be easily maintained.

[0048] Exemplarily, in this embodiment, one of the enclosure 2 and the snail tongue 3 is provided with at least two plug plates 34, and the other of the enclosure 2 and the snail tongue 3 is provided with at least two insertion holes 21, and the at least two plug plates 34 are inserted one by one into the at least two insertion holes 21, so that the snail tongue 3 can be quickly installed on the enclosure 2 or removed from the enclosure 2.

[0049] It is understandable that, in order to ensure that the volute tongue 3 is firmly mounted on the enclosure 2, after at least two plug plates 34 are inserted into at least two insertion holes 21 one by one, the volute tongue 3 is further fixed to the enclosure 2 by screwing.

[0050] It is understandable that in other optional embodiments, the quick disassembly and assembly of the volute tongue 3 may also be achieved through other snap-fit ​​structures, and this embodiment does not impose any specific limitation on this.

[0051] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A volute fan, comprising an impeller (1) and a shroud (2), wherein the shroud (2) is arranged in a volute shape around the outer circumference of the impeller (1), and the shroud (2) is disconnected at the ends, characterized in that: The volute fan further comprises a volute tongue (3), the volute tongue (3) being located at the upstream end of the shroud (2) along the rotation direction of the impeller (1), the shroud (2), the volute tongue (3) and the impeller (1) together forming an air duct, the volute tongue (3) comprising a shell (31) and a partition (32), the shell (31) being hollow, the partition (32) being arranged in the cavity of the shell (31) and dividing the cavity into a plurality of chambers (33), the windward surface of the shell (31) being provided with a plurality of through holes (311), and any one of the chambers (33) being connected to the through hole (311).

2. The volute fan according to claim 1, characterized in that: The housing (31) comprises a first plate portion (312), a second plate portion (313) and a third plate portion (314); along the rotation direction of the impeller (1), the first plate portion (312) extends from the upstream end of the enclosure (2) to the downstream end of the enclosure (2); the second plate portion (313) is arranged at an end of the first plate portion (312) away from the upstream end of the enclosure (2); the third plate portion (314) is located at an end of the second plate portion (313) away from the first plate portion (312); and the through hole (311) is provided on both the second plate portion (313) and the third plate portion (314); The cross-section formed by cutting the second plate portion (313) along the first surface is arc-shaped and protrudes toward the air duct. The first surface is perpendicular to the axial direction of the impeller (1). The surface of the first plate portion (312) facing the air duct is tangent to the surface of the second plate portion (313) facing the air duct. The surface of the third plate portion (314) facing the air duct is tangent to the surface of the second plate portion (313) facing the air duct.

3. The volute fan according to claim 2, characterized in that: The second plate portion (313) extends along the spiral line of the enclosure plate (2).

4. The volute fan according to claim 2, characterized in that: An air outlet (4) is formed at the downstream end of the air duct, and an angle between an edge line of a cross section formed by cutting the third plate portion (314) along the first surface toward the air duct and a plane where the air outlet (4) is located is 75°.

5. The volute fan according to claim 2, characterized in that: The normal cross-section of the third plate portion (314) is arc-shaped and convex toward a side away from the air duct.

6. The volute blower according to claim 5, characterized in that: The impeller (1) comprises a plurality of blades (11), the plurality of blades (11) are evenly arranged in the circumferential direction, and the chord height of the normal cross section of the third plate portion (314) is greater than the distance between two adjacent blades (11).

7. The volute blower according to claim 1, characterized in that: The volute tongue (3) is inlaid on the enclosure (2).

8. The volute blower according to claim 7, characterized in that: One of the enclosure (2) and the volute tongue (3) is provided with at least two plugging plates (34), and the other of the enclosure (2) and the volute tongue (3) is provided with at least two insertion holes (21), and at least two of the plugging plates (34) are inserted into the at least two insertion holes (21) one by one.

9. The volute blower according to claim 1, characterized in that: Any one of the chambers (33) is connected to a plurality of the through holes (311).

10. Integrated stove, characterized in that: It comprises a volute blower as described in any one of claims 1 to 9.

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