CN216009008U - Steaming and baking oven, centrifugal fan thereof and fan blade structure of fan - Google Patents

Abstract

The utility model relates to the technical field of fans, and particularly provides a steaming and baking oven, a centrifugal fan of the steaming and baking oven and a fan blade structure of the fan. Aims to solve the problem of poor air exhaust effect of the existing centrifugal fan. To this end, the fan blade structure of the present invention includes a main body portion and a blade portion disposed on the main body portion, the main body portion having a first surface and a second surface opposite to each other, the blade portion including: a first blade portion provided on the first surface and extending in a direction away from the second surface; and a second blade portion provided on the second surface and extending in a direction away from the first surface; wherein the first vane portion comprises at least one first vane and the second vane portion comprises at least one second vane. The fan blade structure of the fan provided by the utility model can greatly increase the air exhaust amount, so that the temperature in the cavity is more uniform, and the cooking effect is effectively improved.

Description

Steaming and baking oven, centrifugal fan thereof and fan blade structure of fan

Technical Field

The utility model relates to the technical field of fans, and particularly provides a steaming and baking oven, a centrifugal fan of the steaming and baking oven and a fan blade structure of the fan.

Background

A steamer is a domestic or commercial appliance that cooks food materials by means of heat provided by electrical heating. The steaming and baking box is provided with a working cavity for containing food materials, the working cavity is provided with a fan, air in the working cavity can circulate by means of the operation of the fan, and then heat generated by electric heating can reach any position of the working cavity, so that the aim of cooking the food materials in the cavity is fulfilled.

The blower includes a fan and a motor for driving the fan to rotate. The existing fan is mostly of a multi-blade structure, the fan of the multi-blade structure can increase the air exhaust amount of the fan to a certain extent, but the air exhaust amount is limited in lifting degree, the air exhaust amount can be reduced on the contrary along with the further increase of the number of blades, so that the requirement of baking with large air volume cannot be met, and the air exhaust capacity is limited, so that the temperature of air in the cavity is uneven, and the cooking effect is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems, namely, the problem that the existing centrifugal fan is poor in air exhaust effect.

In a first aspect, the present invention provides a fan blade structure of a fan, the fan being formed with a chamber, the fan blade structure being rotatably disposed in the chamber, the fan blade structure including a main body portion and a blade portion disposed on the main body portion, the main body portion having a first surface and a second surface opposite to each other, the blade portion including: a first blade portion provided to the first surface and extending in a direction away from the second surface; and a second blade portion provided to the second surface and extending in a direction away from the first surface; wherein the first vane portion comprises at least one first vane and the second vane portion comprises at least one second vane.

The utility model provides a fan blade structure of a fan, wherein a plurality of blades are arranged on both sides of the main body part of the fan blade, when the fan works, along with the rotation of the fan, the air on one side of the main body part of the fan blade flows towards the middle position of the main body part and flows to the periphery of the fan along the radial direction of the fan under the guide of the blades on the side, meanwhile, the air on the other side of the main body part of the fan blade flows towards the middle position of the corresponding side and flows to the periphery of the fan along the radial direction of the fan under the guide of the blades on the corresponding side, thus, the middle positions on both sides of the fan can form a negative pressure state, the pressure on the periphery of the fan can be further increased, the air outside the fan can be promoted to flow into the inside of the fan more, meanwhile, the air around the fan can flow to the outside of the fan more quickly, and the exhaust amount can be greatly increased, thereby making the temperature in the chamber more uniform and effectively improving the cooking effect.

The fan blade structure of the utility model has various structural forms. For example, the first and second blades of the plate-like structure may be fixedly connected to the body portion in a perpendicular manner to the body portion, and extend beyond the edge of the body portion in a radial direction of the body portion. Or, in order to make the fan blade structure have enough strength, part of the outer edge of the main body part extends outwards along the radial direction to form a plurality of extension members with plate-shaped structures, the plurality of extension members are coplanar with the main body part, the first blade and the second blade extend from the surfaces of the plurality of extension members along the direction forming an included angle with the extension members, and then each extension member and the first blade/second blade structure form a single blade body, and the extension members are used as part of the blade part of the fan blade structure.

It will be appreciated that when an extension member is present, the first/second blade may extend from a central location of the extension member towards a direction at an angle to the extension member, or may extend from a side edge of the extension member towards a direction at an angle to the extension member. When the fan extends outwards from the middle part of the extension component, the air exhaust effect of the forward rotation and the reverse rotation of the fan is similar. When the first blade/the second blade extend from the side edge of the extension component and jointly form a bending structure, the air exhaust effect is better when the rotation direction of the fan faces to the opening direction of the bend.

With regard to the fan blade structure of the fan, in some possible embodiments, the first blade portion includes a plurality of first blades, and the plurality of first blades are disposed on the first surface at a first included angle with respect to the first surface; the second blade part comprises a plurality of second blades, and the second blades are arranged on the second surface in a mode of forming a second included angle with the second surface;

wherein the first included angle and the second included angle are the same or different.

Thus, a specific structural form of the fan blade is provided. The main body part is provided with a plurality of extending members extending along the radial direction, a first surface and a second surface are formed on the extending members, the first blade is arranged on the first surface in a mode of forming a first included angle with the first surface, and then the first blade and the extending members jointly form one blade monomer of the blade part. Similarly, the second blade is disposed on the second surface in a manner of forming a second included angle with the second surface, so that the extension member corresponding to the second surface and the second blade form a single blade of the blade portion, in the two single blades, the extension member is coplanar, and the extension directions of the first blade and the second blade are opposite.

For the fan blade structure of the fan, in some possible embodiments, the first included angle and/or the second included angle is an acute angle, a right angle, or an obtuse angle.

The first included angle and/or the second included angle are/is made into an acute angle structure, a right angle structure or an obtuse angle structure, so that the air flow direction can be better guided, and the air exhaust amount is favorably increased.

It will be appreciated that there are many possible angular combinations of fan blade configurations. For example, the first included angle and the second included angle are both obtuse-angle structures; or the first included angle is an obtuse angle structure, and the second included angle is an acute angle structure; or the first included angle is an acute angle structure, and the second included angle is an obtuse angle structure; alternatively, the first angle and the second angle are both right-angled structures, and so on.

With regard to the fan blade structure of the fan, in some possible embodiments, at least a part of the second blades is located between the first blades as viewed in a circumferential direction of the main body portion; and/or

At least a portion of the first blades are located between the second blades as viewed in a circumferential direction of the body portion.

Thus, an arrangement of the first and second blades is provided. For a single side of the fan blade structure, the first blade and the second blade can be the same in structure and number and can be different from each other, so that various situations can occur when the distribution positions of the blades are arranged. When the number of the first blades is the same as that of the second blades, the first blades and the second blades may be disposed on the first surface and the second surface of the main body portion in a manner of being opposite to each other, or may be disposed on the first surface and the second surface respectively in a manner of being staggered with each other. When the number of the first blades and the second blades is unequal, the first blades are arranged on the first surface in an annular and uniform distribution mode, the second blades are arranged on the second surface in an annular and uniform distribution mode, at least one part of the second blades are positioned between the first blades, and in addition, the situation that one or more first blades are opposite to the second blades can also occur. Similarly, at least a portion of the first vanes are positioned between the second vanes.

With regard to the fan blade structure of the fan, in some possible embodiments, the first blades and the second blades are staggered.

Thus, a specific arrangement of the first and second vanes is provided.

With regard to the fan blade structure of the fan, in some possible embodiments, the number of the first blades is equal to or different from the number of the second blades; and/or

The first blade and the second blade have the same or different structures.

Thus, a specific arrangement of the first and second blades in the structure is provided, as well as a specific arrangement of the first and second blades in number.

Preferably, the first blade and the second blade have the same structure and the same number, so that the exhaust volume of the fan blade structure is improved, and the temperature-homogenizing effect is improved.

With regard to the fan blade structure of the fan, in some possible embodiments, the main body portion is provided with a reinforcing structure corresponding to the position of the first blade and/or the second blade.

Through setting up additional strengthening, can improve the structural strength of flabellum structure to prolong its life.

It will be appreciated that there are a number of ways in which the reinforcing structure may be provided. For example, it may be a rib structure extending in the radial direction, or a rib structure or a frame structure extending in the circumferential direction, or a groove structure protruding toward one side, or the like.

With regard to the fan blade structure of the fan described above, in some possible embodiments, at least a portion of the main body portion, the first blade portion, and the second blade portion is integrally formed.

At least one part of the main body part, the first blade part and the second blade part is manufactured and formed in an integrated forming mode, so that the production cost can be reduced, the production efficiency is improved, and the structural strength of the fan blade structure can be ensured. It will be appreciated that at least a portion of the body portion, the first blade portion and the second blade may also be joined as a unitary structure by welding, bonding, or the like.

In a second aspect, the present invention further provides a centrifugal fan, where the centrifugal fan includes the fan blade structure of the fan in any one of the foregoing technical solutions.

In a third aspect, the utility model further provides a steam oven, which comprises the centrifugal fan in any one of the above technical solutions.

According to the centrifugal fan and the steam oven with the centrifugal fan, due to the arrangement of the fan blade structure with the fan blades on the two sides, in the operation process of the fan, the air flow rate can be improved by means of the fan blades on the two sides, and the temperature of air in a cavity where the fan is located is more uniform.

It can be understood by those skilled in the art that, since the centrifugal fan or the steam oven equipped with the centrifugal fan is equipped with the fan blade structure of the fan according to any one of the foregoing technical solutions, all technical effects that can be obtained by the fan blade structure are achieved, and are not described herein again.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

fig. 1 is a schematic view of an internal structure of a steaming oven provided by the present invention;

FIG. 2 is a schematic view of a fan blade structure according to the present invention;

list of reference numerals:

1. a back plate; 2. a fan blade structure; 21. a body portion; 211. reinforcing ribs; 22. a blade portion; 221. a first blade; 222. a second blade; 223. an extension member; 3. a first hanger; 4. first electrical heating; 5. a fan guard; 51. a first vent hole; 52. a second vent hole; 6. a second hanger; 7. and (5) second electric heating.

Detailed Description

The utility model provides a fan blade structure of a fan, wherein a plurality of blades are arranged on both sides of the main body part of the fan blade, when the fan works, along with the rotation of the fan, the air on one side of the main body part of the fan blade flows towards the middle position of the main body part and flows to the periphery of the fan along the radial direction of the fan under the guide of the blades on the side, meanwhile, the air on the other side of the main body part of the fan blade flows towards the middle position of the corresponding side and flows to the periphery of the fan along the radial direction of the fan under the guide of the blades on the corresponding side, thus, the middle positions on both sides of the fan can form a negative pressure state, the pressure on the periphery of the fan can be further increased, the air outside the fan can be promoted to flow into the inside of the fan more, meanwhile, the air around the fan can flow to the outside of the fan more quickly, and the exhaust amount can be greatly increased, thereby making the temperature in the chamber more uniform and effectively improving the cooking effect.

The fan blade structure and the steaming and baking box equipped with the fan blade structure provided by the utility model are explained with reference to the attached drawings.

The structure of the steaming oven provided with the centrifugal fan in the embodiment is shown in fig. 1. The steaming oven comprises a shell, wherein the shell comprises a back plate 1 and a side plate (not shown) connected with the back plate 1, and the side plate and the back plate 1 are jointly constructed to form a working cavity of the steaming oven. A first electric heater 4, a second electric heater 7, and a first hanger 3 and a second hanger 6 for supporting a tray or a grill are provided at positions adjacent to the inner walls of the side panels. The first electric heater 4 is located at the bottom of the steaming oven and the second electric heater 7 is located at the top of the steaming oven. The left and right sides of working chamber are arranged respectively in to first stores pylon 3 and second stores pylon 6, and the two cooperation work can support multilayer tray or gridion to make the steaming and baking oven can cook a large amount of edible materials simultaneously, wherein the edible material can be the same or the part is different.

With continued reference to fig. 1, a centrifugal fan is connected to the back plate 1 of the steaming and baking oven, and the centrifugal fan needs to be located in the cavity when the centrifugal fan works normally. One side of the back plate 1 facing the working cavity of the steaming oven is connected with a fan cover 5, the fan cover 5 and the back plate 1 are jointly constructed to form a cavity for accommodating a fan, namely a cavity of a centrifugal fan, and at least a fan blade structure 2 of the fan is arranged in the cavity. As shown in fig. 1, to facilitate the display of the fan blade structure 2 in the cavity, the fan guard 5 is not engaged with the back plate 1. A plurality of first ventilation holes 51 have been seted up at the middle part of fan guard 5, a plurality of second ventilation holes 52 have been seted up to the position that fan guard 5 is close to the edge, flabellum structure 2 begins the rotation back under the drive of motor, the air in the working chamber of steaming and baking oven gets into in the cavity that fan guard 5 and backplate 1 structure formed and be full of the cavity space via first ventilation hole 51, along with flabellum structure 2's rotation, the air in the cavity gushes to flabellum structure 2's middle part, and flow around flabellum structure 2 under the guide of blade part 22, then get into the working chamber via second ventilation holes 52, so reciprocal circulation that realizes the hot-air in the working chamber.

Referring to fig. 2, the fan blade structure 2 of the present invention includes a main body 21 and a blade 22 disposed on the main body 21. The main body part 21 is approximately a disc-shaped structure, a part of the edge of the main body part 21 extends outwards in the radial direction to form a plurality of extension members 223, the main body part 21 has a first surface and a second surface, the first surface is positioned at one side of the main body part 21, the second surface is positioned at the other side of the main body part 21, and the first surface and the second surface are also formed on the extension members 223. Referring to fig. 1, in the mounted state, the first surface faces in the direction of the wind cowl 5 and the second surface faces in the direction of the back panel 1.

In the present embodiment, the blade portion 22 includes a first blade portion (not shown) disposed on the first surface of the extension member 223 and extending in a direction away from the second surface of the extension member 223, i.e., in a direction toward the wind cowl 5, a second blade portion (not shown) disposed on the second surface of the extension member 223 and extending in a direction away from the first surface of the extension member 223, i.e., in a direction toward the back plate 1, and an extension member 223 extending from the body portion 21.

Referring to fig. 2, the first blade part includes a plurality of first blades 221, and the first blades 221 have the same structure. The second vane portion includes a plurality of second vanes 222, and the structure of each of the second vanes 222 is the same. The plurality of first blades 221 are disposed on the first surface of the extension member 223 with a first included angle (not labeled) therebetween; the second blades 222 are disposed on the second surface of the extension member 223 at a second angle (not shown).

In this embodiment, the first blades 221 and the second blades 222 have the same shape, the number of the first blades 221 and the number of the second blades 222 are the same, and the first included angle and the second included angle are structures that can complement each other, that is, the first included angle is an obtuse angle and the second included angle is an acute angle, thereby forming an approximately symmetrical structure. Viewed in the circumferential direction of the fan blades, the plurality of first blades 221 are arranged in an annular array around the center of the main body portion 21; a plurality of second vanes 222 are arranged in an annular array about the centre of the body portion 21; the first blades 221 and the second blades 222 are arranged in a staggered manner in the circumferential direction of the fan blade, and this configuration is related to the processing method of the fan blade. Referring to fig. 2, the fan blade structure 2 in this embodiment is formed by punching a circular plate structure, and then bending a part of the punched circular plate in one direction and another part in the opposite direction, so as to form the fan blade structure 2 shown in fig. 2, wherein each fan blade unit of the fan blade structure 2 includes a first fan blade 221 and an extension member 223, or includes a second fan blade 222 and an extension member 223. A first included angle between the first vane 221 of the fan blade structure 2 and a plane where the first surface of the main body portion 21 is located is an obtuse angle, and ranges from 90 ° (not inclusive) to 100 °. A second included angle is formed between the second blade 222 of the fan blade structure 2 and the plane where the second surface of the main body portion 21 is located, the second included angle is an acute angle, and the range is 80 degrees to 90 degrees (not included), which is the same as the first included angle. In this way, a bilateral approximately symmetrical structure is formed, where the approximate symmetry is due to the staggered arrangement of the first blades 221 and the second blades 222, and is not a strictly symmetrical structure. Through setting up like this, set up two flabellums simultaneously in the fan during operation, and then can effectively increase the volume of airing exhaust of fan, promote the even degree of the temperature in the working chamber.

In order to enhance the structural strength of the fan blade structure 2, reinforcing ribs 211 are provided at positions of the main body portion 21 of the fan blade corresponding to the first blade 221 and the second blade 222. As shown in fig. 2, the first surface of the present embodiment is formed with a plurality of ribs 211 protruding outward, and the number of the ribs 211 in the present embodiment is equal to the total number of the first blades 221 and the second blades 222. A coupling hole (not shown) coupled to an output shaft of the motor is formed at a middle portion of the body portion 21.

The flabellum structure in this embodiment is integrated into one piece's structure, and the material is the sheet metal component, forms through carrying out the punching press to the sheet metal component of disc form. The first blade part and the second blade part of the fan blade structure processed in the mode are the same in structure, and in the rotating process, the blade parts on the two sides of the fan blade are close to the symmetrical structure in structure, so that the driving force to air is close to the rotating process, the circulating circulation of the air in the cavity can be better promoted, and the temperature-stabilizing effect of the fan is improved.

It should be noted that the above-mentioned embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of protection of the present invention. In the foregoing detailed description, numerous specific details are set forth in order to provide a better understanding of the utility model. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details.

Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the utility model, and the technical scheme after the changes or substitutions can fall into the protection scope of the utility model.

Claims (10)

1. The utility model provides a flabellum structure of fan, its characterized in that, the fan is formed with the cavity, flabellum structure with rotatable mode set up in the cavity, flabellum structure include the main part with set up in the blade part of main part, the main part has mutually the first surface and the second surface that back to each other, the blade part includes:

a first blade portion provided to the first surface and extending in a direction away from the second surface; and

a second blade portion provided to the second surface and extending in a direction away from the first surface;

wherein the first vane portion comprises at least one first vane and the second vane portion comprises at least one second vane.

2. The fan blade structure of claim 1, wherein the first blade portion comprises a plurality of first blades disposed on the first surface at a first angle with respect to the first surface; the second blade part comprises a plurality of second blades, and the second blades are arranged on the second surface in a mode of forming a second included angle with the second surface;

wherein the first included angle and the second included angle are the same or different.

3. The fan blade structure of claim 2, wherein the first angle and/or the second angle is an acute angle, a right angle, or an obtuse angle.

4. The fan blade structure of claim 3, wherein,

at least a portion of the second blades are located between the first blades as viewed in a circumferential direction of the body portion; and/or

At least a portion of the first blades are located between the second blades as viewed in a circumferential direction of the body portion.

5. The fan blade structure of claim 4, wherein the first blades and the second blades are staggered.

6. The fan blade structure of the fan according to any one of claims 1 to 5, wherein the number of the first blades is equal to or different from the number of the second blades; and/or

The first blade and the second blade have the same or different structures.

7. The fan blade structure of claim 6, wherein the main body is provided with a reinforcing structure at a position corresponding to the first blade and/or the second blade.

8. The fan blade structure of claim 7, wherein at least a portion of the main body portion, the first blade portion, and the second blade portion are integrally formed.

9. A centrifugal fan comprising the fan blade structure of any one of claims 1 to 8.

10. A steam oven characterized in that it comprises a centrifugal fan according to claim 9.

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