Fan system and oven

Abstract

The application 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 a fan blade. The first shaft body is fixedly connected with the output shaft of the motor. The second shaft body is concentrically arranged outside the first shaft body. The reverse rotation assembly is connected with the first shaft body and the second shaft body, so that the second shaft body is reversely rotated by the rotation of the first shaft body. Part of the third shaft body is concentrically arranged outside the second shaft body. The third shaft body is fixedly connected with the second shaft body in the circumferential direction and is slidably connected with the second shaft body in the axial direction. The linkage assembly is connected with the first shaft body and the third shaft body, so that the third shaft body is reciprocally moved in the axial direction by the relative rotation between the first shaft body and the third shaft body. The fan blade is fixed to the outer circumferential surface of the third shaft body. On the one hand, the software of the whole machine is simplified without the different modes of dishes and the preset rotation stopping proportion of dishes. On the other hand, the influence of the installation error of the fan blade on the air volume is reduced, and the installation difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ovens, in particular to a fan system and an oven. BACKGROUND

[0002] At present, the hot air fan inside the oven is fixed to the output shaft of the motor, and the fan blade is driven to rotate by the motor to complete the air outlet.

[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 to control the working parameters of the hot air fan in the actual baking process through the corresponding software, so as to realize the change of air volume in a unit period and meet the different baking requirements.

[0004] The software preset process needs to set the fan speed and the stopping ratio one by one for different baking modes and baked dishes, which is relatively cumbersome.

[0005] In addition, the fan blade of the hot air fan has high precision requirements during installation. If there is an error in the installation position of the fan blade, on the one hand, it will affect the working consistency between different devices, and on the other hand, it will cause the difference between the actual air volume change and the expected air volume change after running according to the software preset working parameters, affecting the cooking effect. SUMMARY

[0006] Therefore, it is necessary to provide a fan system and an oven which can simplify the software and reduce the difficulty of fan blade installation in view of the problem that the software preset process of the hot air fan inside the oven is relatively cumbersome and has high requirements for the installation precision of the fan blade.

[0007] The present application first provides a fan system, which comprises a motor, a first shaft body, a reverse rotation assembly, a second shaft body, a third shaft body, a linkage assembly and a fan blade, wherein,

[0008] The first shaft body is fixedly connected with the output shaft of the motor, the second shaft body is concentrically sleeved outside the first shaft body, and the reverse rotation assembly is connected with the first shaft body and the second shaft body to drive the second shaft body to rotate reversely through the rotation of the first shaft body.

[0009] Part of the third shaft body is concentrically sleeved outside the second shaft body, the third shaft body is fixedly connected with the second shaft body in the circumferential direction and is slidingly connected with the second shaft body in the axial direction, and the linkage assembly is connected with the first shaft body and the third shaft body to drive the third shaft body to reciprocate in the axial direction through the relative rotation therebetween.

[0010] The fan blade is fixed to the outer circumferential surface of the third shaft body.

[0011] In one of the embodiments, the reversing assembly comprises a planet carrier, a sun gear, a ring gear and planet gears, the planet carrier and the sun gear are fixed to the first shaft body, the ring gear is sleeved outside the sun gear, the planet gears are located between the sun gear and the ring gear and are rotationally connected to the planet carrier, the planet gears are respectively engaged with the sun gear and the ring gear, and the second shaft body is fixed to the ring gear.

[0012] In one of the embodiments, the third shaft body is internally provided with a linkage cavity, and part of the second shaft body penetrates into the linkage cavity, and the inner wall of the linkage cavity is provided with a sliding groove connected in head-to-tail manner in the circumferential direction.

[0013] The linkage assembly comprises a first bevel gear, a second bevel gear, an extension rod and a sliding pin, the extension rod is fixed to the outer circumferential surface of the second shaft body in the radial direction, the first bevel gear is rotationally connected to the extension rod, the first bevel gear is fixed with the sliding pin which is in sliding connection with the sliding groove, and the second bevel gear is fixed to the first shaft body and engaged with the second bevel gear.

[0014] In one of the embodiments, the sliding groove surrounds the linkage cavity in one circumferential turn.

[0015] In one of the embodiments, the first shaft body penetrates the linkage cavity to be rotationally connected with the baffle of the hot air fan.

[0016] In one of the embodiments, one of the second shaft body and the third shaft body is provided with a limiting slot in the axial direction, and the other is fixed with a limiting pin, the limiting pin is in abutment with the inner wall of the limiting slot in the circumferential direction and is in sliding connection in the axial direction.

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

[0018] In one of the embodiments, the small fan blade is in sliding connection with the first shaft body along the axial direction of the first shaft body, and the outer circumferential surface of the small fan blade is in rotational connection with the third shaft body.

[0019] In one of the embodiments, the fan blade is a centrifugal fan blade, and the small fan blade is an axial flow fan blade.

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

[0021] The fan system can realize the reciprocating movement of the fan blade along the axial direction while rotating through the power connection between the first shaft body, the reverse assembly, the second shaft body, the third shaft body and the linkage assembly, so that the air volume output by the fan blade changes regularly in a unit cycle of the reciprocating movement of the fan blade. On the one hand, the regularly changed air volume can meet the roasting needs of different modes and dishes, and only the rotating speed and the roasting time need to be set according to the needs, without the need to set the preset stop rotation ratio according to different modes and dishes, so that the software of the whole machine is simplified. On the other hand, the fan blade reciprocates along the axial direction during the working process, which improves the redundancy of the installation position of the fan blade, reduces the influence of the installation error of the fan blade on the air volume, and effectively reduces the installation difficulty of the air volume system. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a sectional view of the fan blade moving to the front end in the fan system of the present application;

[0023] Figure 2 is Figure 1 is an enlarged view of A in FIG. 5;

[0024] Figure 3 is Figure 2 is a schematic view of the fan blade moving to the rear end.

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

[0026] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the scope of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0027] In the description of the application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0028] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0029] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be 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, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0031] It is to be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions as used herein are for illustrative purposes only and are not intended to be limiting.

[0032] Please refer to Figure 1 , Figure 2 and Figure 3 , the present application first provides a fan system, comprising a motor 10, a first shaft body 20, a reversing assembly 30, a second shaft body 40, a third shaft body 50, a linkage assembly 60 and a fan blade 70, wherein the first shaft body 20 is fixedly connected with the output shaft of the motor 10, the second shaft body 40 is concentrically sleeved outside the first shaft body 20, the reversing assembly 30 is connected with the first shaft body 20 and the second shaft body 40 to drive the second shaft body 40 to rotate reversely through the rotation of the first shaft body 20; part of the third shaft body 50 is concentrically sleeved outside the second shaft body 40, the third shaft body 50 is fixedly connected with the second shaft body 40 in the circumferential direction and is slidingly connected with the second shaft body 40 in the axial direction, the linkage assembly 60 is connected with the first shaft body 20 and the third shaft body 50 to drive the third shaft body 50 to reciprocate in the axial direction through the relative rotation therebetween; the fan blade 70 is fixed to the outer circumferential surface of the third shaft body 50.

[0033] In the present application, through the power connection between the first shaft body 20, the reversing assembly 30, the second shaft body 40, the third shaft body 50 and the linkage assembly 60, the fan blade 70 can rotate and reciprocate in the axial direction at the same time, so that the air volume output by the fan blade 70 changes regularly in the unit period of reciprocation, on the one hand, the regularly changed air volume can meet the roasting needs of different modes and dishes, and only the rotation speed and the roasting time need to be set according to the needs, without setting the preset rotation stopping ratio according to different modes and dishes, which simplifies the whole machine software, on the other hand, the fan blade 70 reciprocates in the axial direction during operation, which improves the redundancy of the installation position of the fan blade 70 and reduces the influence of the installation error of the fan blade 70 on the air volume, effectively reducing the installation difficulty of the air volume system of the present application.

[0034] Specifically, the motor 10 drives the first shaft body 20 to rotate forwardly, and at the same time, the first shaft body 20 drives the second shaft body 40 and the third shaft body 50 to rotate reversely through the reversing assembly 30, the linkage assembly 60 can utilize the relative rotation between the first shaft body 20 and the third shaft body 50 to drive the third shaft body 50 to reciprocate in the axial direction, thereby realizing the reciprocation of the fan blade 70 in the axial direction at the same time of rotation.

[0035] Please refer to Figure 2And Figure 3 As shown in FIG. 1 and FIG. 2, the reversing assembly 30 comprises a planet carrier 31, a sun gear 32, a ring gear 33 and a planet gear 34, the planet carrier 31 and the sun gear 32 are fixed on the first shaft body 20, the ring gear 33 is sleeved outside the sun gear 32, the planet gear 34 is located between the sun gear 32 and the ring gear 33 and is rotationally connected to the planet carrier 31, the planet gear 34 is respectively engaged with the sun gear 32 and the ring gear 33, and the second shaft body 40 is fixed with the ring gear 33.

[0036] Through the sequential transmission of the sun gear 32, the planet gear 34 and the ring gear 33, the reverse rotation of the first shaft body 20 and the second shaft body 40 can be realized, thereby improving the relative rotation speed between the first shaft body 20 and the third shaft body 50, improving the frequency of the third shaft body 50 and the fan blade 70 moving along the axial direction, and realizing the regular change of the inner circulation air volume in a very short unit period, thereby improving the redundancy of the entire air duct system.

[0037] In some embodiments, by controlling the gear ratio between the sun gear 32, the planet gear 34 and the ring gear 33, the speed ratio of the first shaft body 20 and the second shaft body 40 can be controlled, thereby further improving the frequency of the fan blade 70 moving along the axial direction.

[0038] Of course, in other embodiments, the reversing assembly 30 can also be realized by using a gear set or other commonly used transmission assembly, or directly driven by multiple power sources, as long as the first shaft body 20 and the second shaft body 40 can rotate in opposite directions. This application will not be exemplified one by one.

[0039] Please combine Figure 2 And Figure 3 As shown in FIG. 1 and FIG. 2, the third shaft body 50 is internally provided with a linkage cavity 51, part of the second shaft body 40 penetrates into the linkage cavity 51, and the inner wall of the linkage cavity 51 is provided with a sliding groove 52 connected in head-to-tail 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 circumferential surface of the second shaft body 40 along the radial direction, the first bevel gear 61 is rotationally connected to the extension rod 63, the first bevel gear 61 is fixed with the sliding pin 64 which is slidingly connected with the sliding groove 52, and the second bevel gear 62 is fixed to the first shaft body 20 and engaged with the second bevel gear 62.

[0040] The linkage assembly 60 is driven by the structures of the first bevel gear 61, the second bevel gear 62, the extension rod 63 and the sliding pin 64. Compared with the structure that the sliding pin 64 is directly fixed on the first shaft body 20 and slidingly matched with the sliding groove 52, the gear ratio between the first bevel gear 61 and the second bevel gear 62 can be adjusted according to the needs, thereby further improving the frequency of the third shaft body 50 and the fan blade 70 moving along the axial direction, and further shortening the unit of reciprocating movement of the fan blade 70.

[0041] Please refer to Figure 2 and Figure 3 It is not difficult to understand that the fewer the number of grooves 52, the shorter the unit period of the third shaft body 50 and the fan blade 70 moving along the axial direction.

[0042] Please refer to Figure 1 , Figure 2 and Figure 3 The first shaft body 20 penetrates the linkage cavity 51 to be rotationally connected with the air heater baffle 1 located on the inner container bottom wall. The motor 10 is fixed relative to the air heater baffle 1. The rotational connection of the first shaft body 20 and the air heater baffle 1 can improve the stability of the first shaft body 20 and avoid shaking during the operation of the fan system.

[0043] Please refer to Figure 2 and 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 is in contact with the inner wall of the limiting groove 53 along the circumferential direction and is slidably connected along the axial direction.

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

[0045] Of course, in other embodiments, other connection methods such as spline connection can also be used as long as the second shaft body 40 and the third shaft body 50 can slide relative to each other along the axial direction and be fixed relative to each other along the circumferential direction.

[0046] Please refer to Figure 2 and Figure 3 The fan system further comprises a small fan blade 80. The small fan blade 80 is located away from the motor 10 along the axial direction of the first shaft body 20, and the small fan blade 80 is fixed along the circumferential direction with the first shaft body 20.

[0047] In this way, 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, first, the two opposite fan blades can better realize airflow mixing, thereby improving the heat exchange effect and gas uniformity. Second, the two fan blades can increase the gas and air pressure in the fan system, thereby improving the wind speed. Finally, the two fan blades rotating in opposite directions can offset the noise generated during operation, thereby reducing the overall noise level during the operation of the fan system.

[0048] Please refer to Figure 2 and Figure 3As shown, the small fan blade 80 is slidingly connected with the first shaft body 20 along the axial direction of the first shaft body 20, and the outer circumferential surface of the small fan blade 80 is rotationally connected with the third shaft body 50. In this way, the small fan blade 80 can reciprocate along the axial direction with the fan blade 70 and the third shaft body 50 in a unit cycle, so that the air volume of the entire fan system changes regularly in a unit cycle.

[0049] Specifically, the small fan blade 80 and the first shaft body 20 are connected by a key, so as to ensure that the small fan blade 80 is slidingly connected with the first shaft body 20 along the axial direction and is fixed with the first shaft body 20 along the circumferential direction, and the outer circumferential surface of the small fan blade 80 is connected with the third shaft body 50 through a bearing.

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

[0051] Please refer to Figure 2 and Figure 3 As shown, preferably, the fan blade 70 is a centrifugal fan blade, and the small fan blade 80 is an axial fan blade. The fan blade 70 is driven to rotate reversely by the third shaft body 50, and the rotating speed is relatively slow. The small fan blade 80 is driven to rotate forwardly by the first shaft body 20, and the rotating speed is relatively fast. In this way, the airflow mixing uniformity and the air volume of the fan can be further improved.

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

[0053] The technical features of the above-mentioned embodiments can be combined in any way. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present application.

[0054] The above-mentioned embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended 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 concentrically sleeved on the outside of the first shaft (20), and the reversing 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) and the second shaft (40) are fixed in the circumferential direction and slidably connected in the axial direction, and 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 between the first shaft (20) and the third shaft (50); 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 (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 engaged with the sun gear (32) and the ring gear (33); and the second shaft (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) passes through the linkage cavity (51), and an inner wall of the linkage cavity (51) is provided with end-to-end connected sliding grooves (52) along a 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 peripheral surface of the second shaft (40) in the 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 on 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) is circumferentially arranged around the linkage cavity (51).

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 (40) and the third shaft (50) is provided with a limiting groove (53) in 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) in the circumferential direction and is slidably connected in 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: The invention comprises a fan system as claimed in any one of claims 1 to 9.

Images