Fan system and oven

Abstract

The invention relates to a fan system and an oven. The fan system comprises a motor, a first shaft body, a reverse rotation assembly, a second shaft body, a third shaft body, a linkage assembly and fan blades, the first shaft body is fixedly connected with an output shaft of the motor, the second shaft body is concentrically arranged on the outer side of the first shaft body in a sleeving mode, and the reverse rotation assembly is connected with the first shaft body and the second shaft body; the second shaft body is driven to rotate reversely through the rotation of the first shaft body; part of the third shaft body is concentrically arranged on the outer side of the second shaft body in a sleeving mode, the third shaft body and the second shaft body are fixed in the circumferential direction and slidably connected in the axial direction, and the linkage assembly is connected with the first shaft body and the third shaft body so as to drive the third shaft body to reciprocate in the axial direction through relative rotation between the first shaft body and the third shaft body; the fan blades are fixed on the outer peripheral surface of the third shaft body; on one hand, the stalling proportion does not need to be preset according to different modes and dishes, the whole machine software is simplified, on the other hand, the influence of the installation error of the fan blades on the air volume is reduced, and the installation difficulty is lowered.

Description

Technical Field

[0001] The present invention relates to the technical field related to ovens, and in particular to a fan system and an oven. Background Art

[0002] At present, the fan blades of the hot air blower inside the oven are fixed to the output shaft of the motor, and the fan blades are driven by the motor to rotate to complete the air discharge;

[0003] However, since different baking modes or different baked dishes have different requirements for baking hot air, most existing ovens need to pre-set the software for different baking modes and different baked dishes, so that the corresponding software can be used to control the working parameters of the hot air blower during the actual baking process, thereby achieving changes in air volume within a unit cycle to meet different baking requirements.

[0004] The software preset process requires setting the fan speed and stop ratio according to different baking modes and baked dishes, which is a cumbersome process.

[0005] In addition, the fan blades of hot air blowers currently have high requirements for accuracy during installation. If there is an error in the installation position of the fan blades, on the one hand, it will affect the working consistency between different devices. On the other hand, it will cause the change in air volume after running according to the software's preset working parameters to be different from the expected air volume change, affecting the cooking effect. Summary of the invention

[0006] Based on this, it is necessary to provide a fan system and oven that can simplify the software and reduce the difficulty of fan blade installation in order to address the problem that the software preset process of the hot air blower inside the oven is relatively cumbersome and has high requirements for the fan blade installation accuracy.

[0007] The present application first provides a fan system, including a motor, a first shaft, a reversing assembly, a second shaft, a third shaft, a linkage assembly and a fan blade, wherein:

[0008] The first shaft is fixedly connected to the output shaft of the motor, the second shaft is concentrically sleeved outside the first shaft, and the reversing assembly connects the first shaft and the second shaft to drive the second shaft to rotate in the opposite direction through the rotation of the first shaft;

[0009] A portion of the third shaft body is concentrically sleeved on the outside of the second shaft body, the third shaft body is fixed to the second shaft body in the circumferential direction and is slidably connected in the axial direction, and the linkage assembly connects the first shaft body and the third shaft body to drive the third shaft body to reciprocate in the axial direction through relative rotation between the first shaft body and the third shaft body;

[0010] The fan blades are fixed to the outer peripheral surface of the third shaft.

[0011] In one embodiment, the reversing assembly includes a planetary wheel carrier, a sun gear, a ring gear and a planetary wheel, the planetary wheel carrier and the sun gear are both fixed to the first shaft, the ring gear is sleeved on the outside of the sun gear, the planetary wheel is located between the sun gear and the ring gear and is rotatably connected to the planetary wheel carrier, the planetary wheel is respectively meshed with the sun gear and the ring gear, and the second shaft is fixed to the ring gear.

[0012] In one embodiment, a linkage cavity is provided inside the third shaft body, a portion of the second shaft body penetrates into the linkage cavity, and a sliding groove connected end to end is provided on the inner wall of the linkage cavity along the circumferential direction;

[0013] The linkage assembly includes a first bevel gear, a second bevel gear, an extension rod and a sliding pin. The extension rod is fixed to the outer peripheral surface of the second shaft in a radial direction. The first bevel gear is rotatably connected to the extension rod. The sliding pin slidably connected to the sliding groove is fixed on the first bevel gear. The second bevel gear is fixed to the first shaft and meshes with the second bevel gear.

[0014] In one of the embodiments, the slide groove surrounds the linkage cavity in a circle.

[0015] In one embodiment, the first shaft passes through the linkage cavity to be rotatably connected to the hot air blower baffle.

[0016] In one embodiment, one of the second shaft body and the third shaft body is provided with a limiting groove along the axial direction, and the other shaft body is fixed with a limiting pin, the limiting pin abuts against the inner wall of the limiting groove along the circumferential direction, and is slidably connected along the axial direction.

[0017] In one embodiment, the fan system further includes a small fan blade, wherein the small fan blade is located away from the motor along the axial direction of the first shaft, and the small fan blade is fixed to the first shaft along the circumferential direction.

[0018] In one of the embodiments, the small fan blade is slidably connected to the first shaft body along the axial direction of the first shaft body, and the outer peripheral surface of the small fan blade is rotationally connected to the third shaft body.

[0019] In one embodiment, the fan blades are centrifugal fan blades, and the small fan blades are axial flow fan blades.

[0020] A second aspect of the present application provides an oven, comprising the above-mentioned fan system.

[0021] The above-mentioned fan system, through the power connection between the first shaft, the reversing component, the second shaft, the third shaft and the linkage component, can realize the reciprocating movement of the fan blades in the axial direction while rotating, so that the air volume output by the fan blades rotates regularly within the unit cycle of its reciprocating movement. On the one hand, the regularly changing air volume can meet the baking requirements of different modes and dishes. It is only necessary to set the speed and baking time according to the needs, and there is no need to preset the stop ratio according to different modes and dishes of the dishes, which simplifies the software of the whole machine. On the other hand, the fan blades move back and forth in the axial direction during operation, which increases the redundancy of the fan blade installation position, reduces the influence of the fan blade installation error on the air volume, and effectively reduces the installation difficulty of the air volume system of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a cross-sectional view of the fan system of the present application when the fan blades move to the front end;

[0023] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0024] Figure 3 for Figure 2 Schematic diagram of the middle fan blade moving to the rear end.

[0025] Figure numerals: 10, motor; 20, first shaft; 30, reversing assembly; 31, planetary gear carrier; 32, sun gear; 33, ring gear; 34, planetary gear; 40, second shaft; 41, limit pin; 50, third shaft; 51, linkage chamber; 52, slide groove; 53, limit groove; 60, linkage assembly; 61, first bevel gear; 62, second bevel gear; 63, extension rod; 64, slide pin; 70, fan blade; 80, small fan blade; 1, hot air blower baffle. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention 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 invention. However, the present invention 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 invention, so the present invention is not limited by the specific embodiments disclosed below.

[0027] In the description of the present invention, it should be understood that 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a 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. A first feature being "below", "below" or "below" a 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.

[0031] It should be noted that when 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. When 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. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0032] Please combine Figure 1 , Figure 2 as well as Figure 3 As shown, the present application first provides a fan system, including a motor 10, a first shaft 20, an inverting assembly 30, a second shaft 40, a third shaft 50, a linkage assembly 60 and a fan blade 70, wherein the first shaft 20 is fixedly connected to the output shaft of the motor 10, the second shaft 40 is concentrically sleeved on the outside of the first shaft 20, the inverting assembly 30 connects the first shaft 20 and the second shaft 40 to drive the second shaft 40 to rotate in the opposite direction through the rotation of the first shaft 20; a portion of the third shaft 50 is concentrically sleeved on the outside of the second shaft 40, the third shaft 50 is fixed to the second shaft 40 in the circumferential direction and slidably connected in the axial direction, the linkage assembly 60 connects the first shaft 20 and the third shaft 50 to drive the third shaft 50 to reciprocate in the axial direction through relative rotation therebetween; the fan blade 70 is fixed to the outer peripheral surface of the third shaft 50.

[0033] In the present application, through the power connection between the first shaft 20, the reversing assembly 30, the second shaft 40, the third shaft 50 and the linkage assembly 60, the fan blades 70 can be reciprocated in the axial direction while rotating, so that the air volume output by the fan blades 70 changes regularly within the unit cycle of its reciprocating movement. On the one hand, the regularly changing air volume can meet the baking requirements of different modes and dishes. It is only necessary to set the speed and baking time according to the needs, and there is no need to preset the stop ratio according to different modes and dishes, which simplifies the software of the whole machine. On the other hand, the fan blades 70 move back and forth in the axial direction during operation, which increases the redundancy of the installation position of the fan blades 70, reduces the influence of the installation error of the fan blades 70 on the air volume, and effectively reduces the installation difficulty of the air volume system of the present application.

[0034] Specifically, the motor 10 drives the first shaft 20 to rotate forward, and at the same time, the first shaft 20 drives the second shaft 40 and the third shaft 50 to reverse through the reversing assembly 30. The linkage assembly 60 can utilize the relative rotation between the first shaft 20 and the third shaft 50 to drive the third shaft 50 to reciprocate in the axial direction, thereby realizing the reciprocating movement of the fan blades 70 in the axial direction while rotating.

[0035] Please combine Figure 2as well as Figure 3 As shown, the reversing assembly 30 includes a planetary wheel carrier 31, a sun gear 32, a ring gear 33 and a planetary wheel 34. The planetary wheel carrier 31 and the sun gear 32 are both fixed to the first shaft 20. The ring gear 33 is sleeved on the outside of the sun gear 32. The planetary wheel 34 is located between the sun gear 32 and the ring gear 33 and is rotatably connected to the planetary wheel carrier 31. The planetary wheel 34 is respectively meshed with the sun gear 32 and the ring gear 33. The second shaft 40 is fixed to the ring gear 33.

[0036] Through the sequential transmission of the sun gear 32, the planetary gear 34 and the ring gear 33, the reverse rotation of the first shaft 20 and the second shaft 40 can be achieved, thereby increasing the relative rotation speed between the first shaft 20 and the third shaft 50, and increasing the frequency of the reciprocating movement of the third shaft 50 and the fan blades 70 in the axial direction, thereby achieving a regular change in the internal circulation air volume within a very short unit period, thereby improving the redundancy of the entire air duct system.

[0037] In some embodiments, by controlling the gear ratios among the sun gear 32 , the planetary gears 34 and the ring gear 33 , the speed ratio between the first shaft 20 and the second shaft 40 can be controlled, thereby further increasing the frequency of the reciprocating movement of the fan blades 70 in the axial direction.

[0038] Of course, in some other embodiments, the reversing component 30 can also be implemented by a gear set or other commonly used transmission components, or directly driven by multiple power sources, etc., as long as the first shaft 20 and the second shaft 40 can rotate in opposite directions. This application does not give examples one by one here.

[0039] Please combine Figure 2 as well as Figure 3 As shown, a linkage cavity 51 is opened inside the third shaft body 50, part of the second shaft body 40 passes through the linkage cavity 51, and the inner wall of the linkage cavity 51 is opened with a slide groove 52 connected end to end along the circumferential direction; the linkage assembly 60 includes a first bevel gear 61, a second bevel gear 62, an extension rod 63 and a sliding pin 64, the extension rod 63 is fixed to the outer circumferential surface of the second shaft body 40 along the radial direction, the first bevel gear 61 is rotatably connected to the extension rod 63, the first bevel gear 61 is fixed with a sliding pin 64 which is slidably connected to the slide groove 52, and the second bevel gear 62 is fixed to the first shaft body 20 and meshes with the second bevel gear 62.

[0040] The linkage assembly 60 is transmitted through structures such as the first bevel gear 61, the second bevel gear 62, the extension rod 63 and the sliding pin 64. Compared with the structure in which the sliding pin 64 is directly fixed on the first shaft 20 and slides with the sliding groove 52, the gear ratio between the first bevel gear 61 and the second bevel gear 62 can be adjusted as needed, thereby further increasing the frequency of the reciprocating movement of the third shaft 50 and the fan blades 70 in the axial direction, and further shortening the reciprocating movement unit of the fan blades 70.

[0041] Please combine Figure 2 as well as Figure 3 As shown, the slide groove 52 circles around the linkage chamber 51 in one circle. It is easy to understand that the fewer circles of the slide groove 52, the shorter the unit period of the reciprocating movement of the third shaft body 50 and the fan blade 70 in the axial direction.

[0042] Please combine Figure 1 , Figure 2 as well as Figure 3 As shown, the first shaft 20 passes through the linkage cavity 51 and is rotatably connected to the hot air blower baffle 1. The hot air blower baffle 1 is located on the bottom wall of the inner tank. The motor 10 is relatively fixed to the hot air blower baffle 1. Rotating the first shaft 20 to the hot air blower baffle 1 can improve the stability of the first shaft 20 and avoid shaking during the operation of the fan system.

[0043] Please combine Figure 2 as well as Figure 3 One of the second shaft body 40 and the third shaft body 50 is provided with a limiting groove 53 along the axial direction, and the other is fixed with a limiting pin 41. The limiting pin 41 abuts against the inner wall of the limiting groove 53 along the circumferential direction and is slidably connected along the axial direction.

[0044] Preferably, a limiting pin 41 is fixed on the second shaft body 40 , and a limiting groove 53 is provided on the inner wall of the third shaft body 50 .

[0045] Of course, in some other embodiments, other connection methods are also used, such as spline connection, etc., as long as the second shaft body 40 and the third shaft body 50 can slide relatively in the axial direction and are relatively fixed in the circumferential direction.

[0046] Please combine Figure 2 as well as Figure 3 As shown, the fan system further includes a small fan blade 80, which is located along the axial direction of the first shaft body 20 and away from the motor 10 of the fan blade 70, and the small fan blade 80 is fixed to the first shaft body 20 along the circumferential direction.

[0047] The arrangement is such that the fan blade 70 and the small fan blade 80 rotate at the same time, and the rotation directions of the two are opposite. Compared with the traditional single fan blade structure, firstly, the two fan blades in opposite directions can better achieve airflow mixing, thereby improving the heat exchange effect and gas uniformity. Secondly, the two fan blades can increase the gas and air pressure in the fan system, thereby increasing the wind speed. Finally, the two fan blades turning in opposite directions can offset each other's noise generated during operation, thereby reducing the overall noise level of the fan system during operation.

[0048] Please combine Figure 2 as well as Figure 3As shown, the small fan blades 80 are slidingly connected to the first shaft body 20 along the axial direction of the first shaft body 20, and the outer peripheral surface of the small fan blades 80 is rotatably connected to the third shaft body 50. This arrangement allows the small fan blades 80 to move back and forth along the axial direction within a unit cycle along with the fan blades 70 and the third shaft body 50, so that the air volume of the entire fan system changes regularly within a unit cycle.

[0049] Specifically, a key connection is adopted between the small fan blade 80 and the first shaft body 20 to ensure that the small fan blade 80 is slidingly connected to the first shaft body 20 in the axial direction and is fixed to the first shaft body 20 in the circumferential direction. The outer peripheral surface of the small fan blade 80 is connected to the third shaft body 50 through a bearing.

[0050] Of course, in some other embodiments, other commonly used connection methods may be used between the small fan blades 80 and the first shaft body 20, and between the small fan blades 80 and the third shaft body 50, as long as the above requirements can be met.

[0051] Please combine Figure 2 as well as Figure 3 As shown, preferably, the fan blades 70 are centrifugal fan blades and the small fan blades 80 are axial flow fan blades, wherein the fan blades 70 are driven by the third shaft 50 to reverse at a relatively slow speed, and the small fan blades 80 are driven by the first shaft 20 to rotate forward at a relatively fast speed. Such an arrangement can further improve the airflow mixing uniformity and the fan air volume.

[0052] A second aspect of the present application provides an oven, comprising the above-mentioned fan system.

[0053] 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.

[0054] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A fan system, characterized in that: The invention comprises a motor (10), a first shaft (20), an inverting assembly (30), a second shaft (40), a third shaft (50), a linkage assembly (60) and a fan blade (70), wherein: The first shaft (20) is fixedly connected to the output shaft of the motor (10); the second shaft (40) is coaxially sleeved on the outside of the first shaft (20); and the reversing assembly (30) is connected to the first shaft (20) and the second shaft (40) so as to drive the second shaft (40) to rotate in the opposite direction through the rotation of the first shaft (20); A portion of the third shaft (50) is coaxially sleeved on the outside of the second shaft (40); the third shaft (50) and the second shaft (40) are fixed in the circumferential direction and slidably connected in the axial direction; the linkage assembly (60) connects the first shaft (20) and the third shaft (50) so as to drive the third shaft (50) to reciprocate in the axial direction through relative rotation between the two; The fan blade (70) is fixed to the outer peripheral surface of the third shaft body (50).

2. The fan system according to claim 1, characterized in that: The reversing assembly (30) comprises a planetary wheel carrier (31), a sun gear (32), a ring gear (33) and a planetary wheel (34); the planetary wheel carrier (31) and the sun gear (32) are both fixed to the first shaft body (20); the ring gear (33) is sleeved on the outside of the sun gear (32); the planetary wheel (34) is located between the sun gear (32) and the ring gear (33) and is rotatably connected to the planetary wheel carrier (31); the planetary wheel (34) is respectively meshed with the sun gear (32) and the ring gear (33); and the second shaft body (40) is fixed to the ring gear (33).

3. The fan system according to claim 1, characterized in that: A linkage cavity (51) is provided inside the third shaft body (50), a portion of the second shaft body (40) penetrates into the linkage cavity (51), and a sliding groove (52) connected end to end is provided on the inner wall of the linkage cavity (51) along the circumferential direction; The linkage assembly (60) comprises a first bevel gear (61), a second bevel gear (62), an extension rod (63) and a sliding pin (64); the extension rod (63) is fixed to the outer peripheral surface of the second shaft (40) in a radial direction; the first bevel gear (61) is rotatably connected to the extension rod (63); the sliding pin (64) slidably connected to the sliding groove (52) is fixed to the first bevel gear (61); the second bevel gear (62) is fixed to the first shaft (20) and meshes with the second bevel gear (62).

4. The fan system according to claim 3, characterized in that: The sliding groove (52) surrounds the linkage chamber (51) in a circumferential direction.

5. The fan system according to claim 3, characterized in that: The first shaft (20) passes through the linkage cavity (51) and is rotatably connected to the hot air blower baffle (1).

6. The fan system according to claim 1, characterized in that: One of the second shaft body (40) and the third shaft body (50) is provided with a limiting groove (53) along the axial direction, and the other is fixed with a limiting pin (41), wherein the limiting pin (41) abuts against the inner wall of the limiting groove (53) along the circumferential direction and is slidably connected along the axial direction.

7. The fan system according to any one of claims 1 to 5, characterized in that: The fan system further comprises a small fan blade (80), wherein the small fan blade (80) is located on the fan blade (70) away from the motor (10) along the axial direction of the first shaft (20), and the small fan blade (80) is fixed to the first shaft (20) along the circumferential direction.

8. The fan system according to claim 7, characterized in that: The small fan blade (80) is slidably connected to the first shaft body (20) along the axial direction of the first shaft body (20), and the outer peripheral surface of the small fan blade (80) is rotationally connected to the third shaft body (50).

9. The fan system according to claim 7, characterized in that: The fan blades (70) are centrifugal fan blades, and the small fan blades (80) are axial flow fan blades.

10. An oven, characterized in that: Comprising a fan system as claimed in any one of claims 1 to 9.

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