CN220705983U - Centrifugal fan for cooking equipment and steaming and baking integrated machine - Google Patents

Abstract

The utility model relates to a centrifugal fan for cooking equipment and a steaming and baking all-in-one machine, which comprises an impeller and a motor for driving the impeller to rotate, wherein the impeller comprises a base plate, first blades are arranged on the first surface of the base plate at intervals along the circumferential direction by taking a straight line of a central shaft of the impeller as the center to form first blades, second blades are arranged on the second surface of the base plate at intervals along the circumferential direction by taking the straight line of the central shaft of the impeller as the center to form second blades, and the steaming and baking all-in-one machine further comprises a first ring body and a second ring body which are in a ring shape, each ring body is respectively arranged by taking the straight line of the central shaft of the impeller as the center, wherein the first ring body is sleeved outside the first blades and is respectively fixed with each first blade, and the second ring body is sleeved outside the second blades and is respectively fixed with each second blade. According to the utility model, the structural firmness of the impeller can be enhanced by arranging the first ring body and the second ring body, so that the dynamic balance of the impeller in the rotating process is improved, and the rotating noise is reduced.

Description

Centrifugal fan for cooking equipment and steaming and baking integrated machine

Technical Field

The utility model relates to the field of cooking equipment, in particular to a centrifugal fan for cooking equipment and a steaming and baking integrated machine.

Background

The double-layer centrifugal fan blade can be used for air intake at two sides of the double-layer centrifugal fan blade, and can obtain technical effects superior to those of the single-layer centrifugal fan blade (namely the common centrifugal fan blade) under certain situations when the double-layer centrifugal fan blade is applied to cooking equipment. For example, chinese patent application No. ZL 201910819859.8 (publication No. CN 110477761 a) discloses an exhaust structure, which includes a liner and an upper mounting plate above the liner, where an exhaust port is formed on a top wall of the liner, and further includes an exhaust system and an exhaust cavity having a fan, an air inlet of the exhaust cavity is in fluid communication with the exhaust port, the exhaust system includes an exhaust channel communicated with the outside and a fan cavity for mounting the fan, the fan has an upper impeller and a lower impeller (i.e., double-layer centrifugal fan blades) disposed up and down, the fan cavity has upper and lower air inlets corresponding to the upper and lower impellers, the lower air inlet of the fan cavity is in fluid communication with an air outlet of the exhaust cavity, and the air outlet of the fan cavity is in fluid communication with the air inlet of the exhaust channel. Compared with the common single-layer centrifugal fan blade, the exhaust efficiency is improved through the arrangement of the upper impeller and the lower impeller in the patent, and especially, a user who directly sprays steam when opening a door can be avoided in a steaming mode.

Further, for example, chinese patent No. ZL201910819858.3 (issued to the public No. CN 110448191B) discloses an oven having a heat dissipation structure, wherein the heat dissipation structure includes a heat dissipation channel communicating with the outside, a heat dissipation cavity, and a fan cavity having a heat dissipation fan mounted thereon, the heat dissipation fan has an upper impeller and a lower impeller disposed up and down, and the fan cavity has upper and lower air inlets corresponding to the upper and lower impellers, respectively, the upper air inlet of the fan cavity is in fluid communication with the upper mounting space, the lower air inlet of the fan cavity is in fluid communication with the air outlet of the heat dissipation cavity, the air outlet of the fan cavity is in fluid communication with the air inlet of the heat dissipation channel, and the air inlet of the heat dissipation cavity is in fluid communication with the air outlet port of the ventilation interlayer. Compared with the common single-layer centrifugal fan blade, the device has the advantages that the active heat dissipation of the oven door body and the heat dissipation of the electric elements are realized simultaneously through the arrangement of the upper impeller and the lower impeller.

From the above, in some situations, the technical effect of using the double-layer centrifugal fan blade in the cooking device is better than that of the single-layer centrifugal fan blade or the technical effect that cannot be obtained by the single-layer centrifugal fan blade, however, the blades are arranged on both sides of the double-layer centrifugal fan blade, so that the requirement on structural firmness is high, and if the structure is infirm, dynamic balance can be influenced in the high-speed rotation process, so that the working noise is increased.

Disclosure of Invention

The utility model aims to provide a centrifugal fan for cooking equipment, which has high structural firmness of an impeller.

The utility model aims to provide a steaming and baking all-in-one machine with the centrifugal fan aiming at the prior art.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: the utility model provides a centrifugal fan for cooking equipment, including impeller and be used for driving this impeller rotatory motor, this impeller includes the base plate, set up first blade along circumference interval on the first surface of this base plate with the straight line that the center pin of above-mentioned impeller is located as the center, form first flabellum, set up the second blade along circumference interval on the second surface with the straight line that the center pin of above-mentioned impeller is located as the center, a serial communication port, still include the first circle body of circle and second circle body, each circle body sets up with the straight line that the center pin of above-mentioned impeller is located as the center respectively, wherein, first circle body cover is established outside first flabellum and is fixed mutually with each first blade respectively, and the second circle body cover is established outside the second flabellum and is fixed mutually with each second blade respectively.

Further, each of the first blades is disposed perpendicularly to the base plate, and the first ring is fixed to an outer end of each of the first blades, which is farthest from the base plate, respectively. On one hand, the structural firmness of the impeller can be further improved by further designing the positions of the ring bodies and the corresponding blades, and on the other hand, the influence of the arrangement of the ring bodies on the air outlet of the impeller can be avoided, so that the air quantity of the impeller is ensured.

Further, the motor is arranged at one side of the impeller and is adjacent to the second fan blade,

the substrate is circular in shape, the radii of the first ring body and the second ring body are respectively larger than the radius of the substrate, and the radius of the second ring body is larger than the radius of the first ring body. Therefore, the flow linearity of the impeller can be improved, and the dynamic balance of the impeller in the rotating state can be improved.

Further, the center of the base plate protrudes towards the motor direction to form a groove on the first surface of the base plate, the cross section of the groove is round, a shaft sleeve for the wheel shaft of the impeller to penetrate is arranged at the center of the groove, reinforcing plates are arranged in the groove at intervals along the radial direction, the reinforcing plates are arranged at intervals along the circumferential direction of the groove, and the inner side ends of the reinforcing plates are respectively fixed on the outer surface of the shaft sleeve. The structural firmness of the impeller can be further enhanced by arranging the grooves and the reinforcing plates in the grooves.

Further, the upper cover of the opening of the groove is provided with a cover body which is convexly arranged on the first surface of the substrate, and the cross section of the cover body is circular and the outer surface of the cover body is smooth. The cover body with smooth outer surface is utilized to shield the groove, so that the structural firmness of the impeller is enhanced, and meanwhile, wind resistance can be avoided, and the overall working noise of the centrifugal fan is reduced.

Further, the shape of the cover body is in a round table shape, so that wind resistance in the rotating process can be better avoided.

Further, the cover body is fixed with the groove through a fastening component after being connected with the groove in a buckling mode. Thereby being convenient for realizing the connection and the fixation of the cover body and the groove.

Further, a through hole penetrating through the shaft sleeve is arranged at the center of the cover body, the hole edge of the through hole axially extends inwards along the circumferential direction to form a connecting sleeve, at least two buckling grooves corresponding to the corresponding reinforcing plates one by one are respectively arranged on the inner surface of the cover body at intervals along the circumferential direction, each buckling groove is respectively arranged along the radial direction and is used for clamping the corresponding reinforcing plate, the inner side ends of the buckling grooves are respectively fixed on the outer surface of the connecting sleeve,

under the state that the cover body is assembled with the groove, corresponding reinforcing plates in the groove are respectively clamped into corresponding clamping grooves, and the free end of the wheel shaft is exposed out of the cover body and is fixed with the cover body through the fastening component, so that the cover body is fixedly connected with the groove.

Further, each buckling groove is respectively surrounded by two buckling plates which are arranged in parallel at intervals, and each buckling plate is respectively arranged on the inner surface of the cover body in a protruding mode along the longitudinal section direction of the cover body. Therefore, the buckling groove can be better formed in the inner surface of the cover body, and the structural firmness of the cover body can be improved by arranging the buckling plate, so that the integral structural firmness of the impeller is improved.

Further, the outer side edges of the buckling plates extend outwards along the plane where the buckling plates are located respectively to form wavy reinforced convex edges. Thereby being beneficial to improving the structural firmness of each buckle plate and further improving the structural firmness of the cover body.

Further, a fastening block is convexly arranged on the inner surface of the connecting sleeve, and a fastening notch into which the fastening block is fastened is formed by axially concavely recessing the outer end edge of the shaft sleeve. The positioning of the cover body and the groove connection process is facilitated, the assembly connection of connection is facilitated, and the connection of the cover body and the groove connection is firmer.

Further, an external thread is arranged at the exposed end of the wheel shaft, the fastening component comprises a nut and a gasket, the nut is in threaded connection with the external thread of the wheel shaft, and the gasket is clamped between the nut and the cover body, so that the cover body and the groove can be fixed.

Further, in the assembled state of the cover body and the groove, the free end face of the shaft sleeve is exposed out of the cover body, the gasket is clamped between the nut and the free end face, the free end face is convexly provided with a positioning block, and the gasket is provided with a positioning notch for the positioning block to be clamped in. Therefore, the positioning block is clamped into the positioning notch to position the gasket, so that the fixing structure between the cover body and the groove is more stable.

The technical scheme adopted for further solving the second technical problem is as follows: the steaming and baking integrated machine is characterized by comprising the centrifugal fan for the cooking equipment.

Compared with the prior art, the utility model has the advantages that: the utility model is provided with a first ring body and a second ring body, wherein each ring body is respectively arranged by taking a straight line where a central shaft of the impeller is positioned as a center, the first ring body is sleeved outside the first fan blade and is respectively fixed with each first blade, and the second ring body is sleeved outside the second fan blade and is respectively fixed with each second blade. Therefore, the structural firmness of the impeller can be enhanced by arranging the first ring body and the second ring body, so that the dynamic balance in the rotation process of the impeller is improved, and the rotation noise is reduced.

Drawings

FIG. 1 is a schematic diagram of a centrifugal fan in an embodiment of the utility model;

FIG. 2 is a schematic view of the structure of FIG. 1 in another direction;

FIG. 3 is a cross-sectional view of a centrifugal blower in an embodiment of the utility model;

FIG. 4 is a partial exploded view of a centrifugal fan in accordance with an embodiment of the present utility model;

fig. 5 is a schematic view of the structure of fig. 4 in another direction.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for purposes of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and because the disclosed embodiments of the present utility model may be arranged in different orientations, these directional terms are merely for illustration and should not be construed as limitations, such as "upper", "lower" are not necessarily limited to orientations opposite or coincident with the direction of gravity. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly.

The steaming and baking integrated machine comprises a centrifugal fan as shown in figures 1-5, wherein the centrifugal fan comprises an impeller 1 and a motor 2 for driving the impeller 1 to rotate. The impeller 1 includes a base plate 10, first blades 111 are provided on a first surface of the base plate 10 at intervals in the circumferential direction around a straight line on which a central axis of the impeller 1 is located, to form first blades 11, and second blades 121 are provided on a second surface of the base plate at intervals in the circumferential direction around a straight line on which a central axis of the impeller 1 is located, to form second blades 12.

Further, the centrifugal fan further includes a first ring body 3 and a second ring body 4 having a circular shape, each ring body being disposed around a straight line where the central axis of the impeller 1 is located, wherein the first ring body 3 is sleeved outside the first fan blades 11 and is fixed to each of the first fan blades 111, and the second ring body 4 is sleeved outside the second fan blades 12 and is fixed to each of the second fan blades 121. Therefore, the structural firmness of the impeller 1 can be enhanced by arranging the first ring body 3 and the second ring body 4, so that the dynamic balance of the impeller 1 in the rotating process is improved, and the rotating noise is reduced.

Further, each of the first blades 111 is disposed perpendicularly to the substrate 10, and the first ring 3 is fixed to the outer end of each of the first blades 111 farthest from the substrate 10; accordingly, each of the second blades 121 is disposed perpendicularly to the base plate 10, and the second ring 4 is fixed to the outer end of each of the second blades 121 farthest from the base plate 10. On the one hand, the structural firmness of the impeller 1 can be further improved by further designing the positions of each ring body and the corresponding blades, and on the other hand, the influence of the arrangement of each ring body on the air outlet of the impeller 1 can be avoided, so that the air quantity of the centrifugal fan is ensured. Further, in the present embodiment, the first blades 111 of the first fan blade 11 are respectively corresponding to the second blades 121 of the second fan blade 12 one by one, and each first blade 111 is opposite to the corresponding second blade 121, and meanwhile, the shape of each first blade 111 and each second blade 121 is in a rectangular shape as a whole, so that the area of the connection part between each blade and the base plate 10 is larger, which is beneficial to improving the structural firmness of the impeller 1.

Further, the motor 2 is disposed at one side of the impeller 1 and is adjacent to the second fan blade 12. The shape of the substrate 10 is circular, the radii of the first ring body 3 and the second ring body 4 are respectively larger than the radius of the substrate 10, and the radius of the second ring body 4 is larger than the radius of the first ring body 3. Therefore, the flow linearity of the impeller 1 can be improved, and the dynamic balance of the impeller 1 in the rotating state can be improved.

Further, a groove 13 is formed on the first surface of the base plate 10 by protruding toward the motor 2 at the center of the base plate 10, the cross section of the groove 13 is circular, and a sleeve 132 for the axle 14 of the impeller 1 to pass through is provided at the center of the groove 13. Reinforcing plates 131 are provided in the groove 13 at intervals in the radial direction, the reinforcing plates 131 are provided at intervals in the circumferential direction of the groove 13, and inner ends of the reinforcing plates 131 are respectively fixed to the outer surface of the boss 132. This further enhances the structural rigidity of the impeller 1 by providing the recess 13 and providing the reinforcing plate 131 in the recess 13.

Preferably, the opening of the recess 13 is covered with a cover 5, the cover 5 is protruded on the first surface of the substrate 10, and the cross section of the cover 5 is circular and the outer surface is smooth. The cover body 5 with the smooth outer surface is utilized to shield the groove 13, so that the structural firmness of the impeller 1 is enhanced, and the wind resistance at the groove 13 can be avoided, thereby reducing the overall working noise of the centrifugal fan. Specifically, in this embodiment, the outer shape of the cover body 5 is in a truncated cone shape, so that wind resistance in the rotation process can be better avoided.

Further, the cover 5 is fastened to the groove 13 by the fastening assembly 6 after being fastened, so that the cover 5 is conveniently connected to the groove 13. Specifically, a through hole 51 is formed in the center of the cover 5, through which the sleeve 132 passes, and a hole edge of the through hole 51 extends axially inward along a circumferential direction to form a connecting sleeve 511. And at least two fastening grooves 52 corresponding to the corresponding reinforcing plates 131 are respectively arranged on the inner surface of the cover body 5 along the circumferential direction at intervals, each fastening groove 52 is respectively arranged along the radial direction and is used for the corresponding reinforcing plate 131 to be fastened in, and the inner ends of the fastening grooves 52 are respectively fixed on the outer surface of the connecting sleeve 511. In the assembled state of the cover 5 and the groove 13, the corresponding reinforcing plates 131 in the groove 13 are respectively clamped into the corresponding clamping grooves 52, and the free ends of the wheel shafts 14 are exposed out of the cover 5 and are fixed with the cover 5 through the fastening components 6, so that the cover 5 and the groove 13 are connected and fixed.

Further, specifically, each of the fastening grooves 52 is surrounded by two fastening plates 521 disposed in parallel and spaced apart, and each of the fastening plates 521 is disposed on the inner surface of the housing 5 in a protruding manner along the longitudinal cross-section direction of the housing 5. Therefore, the buckling groove 52 can be better arranged on the inner surface of the cover body 5, and the structural firmness of the cover body 5 can be improved by arranging the buckling plate 521, so that the overall structural firmness of the impeller 1 can be improved. Preferably, the outer edge of each of the fastening plates 521 extends outwards along the plane of the fastening plate 521 to form a wavy reinforced convex edge 5211, so as to facilitate improving the structural firmness of each fastening plate 521 and further improve the structural firmness of the cover 5. Further preferably, the inner surface of the connecting sleeve 511 is provided with a locking piece 5111 in a protruding manner, and the outer end edge of the sleeve 132 is recessed in an axial direction to form a locking notch 1321 into which the locking piece 5111 is locked. Thereby being beneficial to realizing the positioning of the cover body 5 and the groove 13 in the connecting process, not only being convenient for the assembly connection of connection, but also ensuring the connection of the cover body 5 and the groove 13 to be firmer.

Further, an external thread (not shown) is provided on the exposed end of the axle 14, and the fastening assembly 6 includes a nut 61 and a washer 62, wherein the nut 61 is screwed with the external thread of the axle 14, and the washer 62 is interposed between the nut 61 and the housing 5, so that the housing 5 is fixed with the groove 13. Preferably, in a state where the cover 5 and the groove 13 are assembled, a free end surface of the sleeve 132 is exposed to the cover 5, the spacer 62 is sandwiched between the nut 61 and the free end surface, the free end surface is provided with a positioning block 1322 in a protruding manner, and the spacer 62 is provided with a positioning notch 621 into which the positioning block 1322 is engaged. Thus, the positioning block 1322 is clamped into the positioning notch 621 to position the gasket 62, so that the fixing structure between the cover body 5 and the groove 13 is more stable.

Claims (14)

1. The utility model provides a centrifugal fan for cooking equipment, including impeller (1) and be used for driving this impeller (1) rotatory motor (2), this impeller (1) includes base plate (10), set up first blade (111) and form first flabellum (11) along circumference interval on the first surface of this base plate (10) taking the straight line that the center pin of above-mentioned impeller (1) is located as the center, set up second blade (121) and form second flabellum (12) along circumference interval on the second surface taking the straight line that the center pin of above-mentioned impeller (1) is located as the center, characterized by still including the first circle body (3) of circle and second circle body (4) of circle form, each circle body sets up with the straight line that the center pin of above-mentioned impeller (1) is located as the center respectively, wherein, first circle body (3) cover is established outside first blade (11) and is fixed with each first blade (111) respectively, and second circle body (4) cover is established outside second flabellum (12) and is fixed with each second blade (121) respectively.

2. Centrifugal fan for cooking devices according to claim 1, wherein each of said first blades (111) is arranged perpendicularly to the base plate (10) and said first ring (3) is fixed furthest from said base plate (10) in the outer ends of each first blade (111), respectively, said second blades (121) are arranged perpendicularly to the base plate (10) and said second ring (4) is fixed furthest from said base plate (10) in the outer ends of each second blade (121).

3. Centrifugal fan for cooking equipment according to claim 2, characterized in that the motor (2) is arranged on one side of the impeller (1) and adjacent to the second fan blade (12),

the shape of the base plate (10) is circular, the radius of the first ring body (3) and the radius of the second ring body (4) are respectively larger than the radius of the base plate (10), and the radius of the second ring body (4) is larger than the radius of the first ring body (3).

4. A centrifugal fan for a cooking apparatus according to claim 3, wherein the base plate (10) is provided with a groove (13) formed in the first surface of the base plate (10) so as to protrude toward the motor (2) at the center thereof, the groove (13) being circular in cross section, a boss (132) through which the wheel shaft (14) of the impeller (1) is inserted is provided at the center of the groove (13), and reinforcing plates (131) are provided in the groove (13) at intervals in the radial direction, the reinforcing plates (131) being provided at equal intervals in the circumferential direction of the groove (13), and inner side ends of the reinforcing plates (131) being respectively fixed to the outer surface of the boss (132).

5. Centrifugal fan for cooking equipment according to claim 4, characterized in that the opening of the recess (13) is covered with a cover (5), which cover (5) is arranged protruding on the first surface of the base plate (10), and that the cover (5) has a circular cross section and a rounded outer surface.

6. Centrifugal fan for cooking equipment according to claim 5, characterized in that the housing (5) has a truncated cone-like shape.

7. Centrifugal fan for cooking devices according to claim 5 or 6, characterized in that the cover (5) is fastened by means of a fastening assembly (6) after snap-connection with the recess (13).

8. The centrifugal fan for cooking equipment according to claim 7, wherein a through hole (51) through which the shaft sleeve (132) passes is formed in the center of the cover body (5), the hole edge of the through hole (51) extends axially inwards along the circumferential direction to form a connecting sleeve (511), at least two buckling grooves (52) which are in one-to-one correspondence with corresponding reinforcing plates (131) are formed on the inner surface of the cover body (5) at intervals along the circumferential direction, each buckling groove (52) is respectively arranged along the radial direction and is used for being buckled by the corresponding reinforcing plate (131), and the inner side end of each buckling groove (52) is respectively fixed on the outer surface of the connecting sleeve (511),

in the assembled state of the cover body (5) and the groove (13), corresponding reinforcing plates (131) in the groove (13) are respectively clamped into corresponding clamping grooves (52), and the free ends of the wheel shafts (14) are exposed out of the cover body (5) and are fixed with the cover body (5) through the fastening components (6).

9. Centrifugal fan for cooking equipment according to claim 8, characterized in that each of the snap-in grooves (52) is surrounded by two snap-in plates (521) arranged at a parallel interval, and each of the snap-in plates (521) is arranged protruding on the inner surface of the housing (5) along the longitudinal section direction of the housing (5).

10. Centrifugal fan for cooking equipment according to claim 9, wherein the outer edge of each of the snap plates (521) extends outwards along the plane of the snap plate (521) to form a wavy stiffening bead (5211).

11. Centrifugal fan for cooking equipment according to claim 8, characterized in that the inner surface of the connecting sleeve (511) is provided with a convex fastening block (5111), and the outer end edge of the shaft sleeve (132) is recessed axially to form a fastening notch (1321) into which the fastening block (5111) is fastened.

12. Centrifugal fan for cooking equipment according to claim 8, wherein the axle (14) is provided with an external thread on the exposed end, said fastening assembly (6) comprising a nut (61) and a washer (62), wherein the nut (61) is screwed with the external thread of said axle (14) and the washer (62) is sandwiched between the nut (61) and said housing (5).

13. Centrifugal fan for cooking equipment according to claim 12, wherein in the assembled state of the housing (5) and the recess (13), the free end face of the sleeve (132) is exposed to the housing (5), the spacer (62) is clamped between the nut (61) and the free end face, the free end face is provided with a positioning block (1322) in a protruding manner, and the spacer (62) is provided with a positioning notch (621) into which the positioning block (1322) is clamped.

14. A steaming and baking all-in-one machine characterized by having a centrifugal fan for a cooking apparatus according to any one of claims 1 to 13.