Fan structure and cooking equipment

Abstract

This invention relates to a fan structure and a cooking device. The fan structure includes an inner liner, a motor, an adjusting component, and a fan. A fan cover is fixed to the inner wall of the cooking cavity of the inner liner to form a fan cavity between the fan cover and the inner wall of the cooking cavity. The fan cover has a through-hole for airflow. The motor is fixed to the outer wall of the inner liner, and its drive shaft is splinedly connected to a rotor inside the motor. The drive shaft passes through the inner liner into the fan cavity. The adjusting component is rotatably connected to the drive shaft and can drive the drive shaft to move along its axial direction. The fan includes a fan disc and a first fan blade. The fan disc is located inside the fan cavity and fixed to the drive shaft. The first fan blade is fixed to the side of the fan disc near the fan cover. By connecting the motor's drive shaft to the rotor spline and providing an adjusting component to adjust the movement of the drive shaft along its axial direction, the motor's shaft length can be adjusted. This effectively increases the range of adjustment for the internal airflow and speed of the inner liner, and also effectively reduces inventory costs during production.

Description

Technical Field

[0001] This invention relates to the technical field of cooking equipment, and in particular to a fan structure and cooking equipment. Background Technology

[0002] Ovens, steam ovens, and other cooking appliances are usually equipped with fans. The fan blades are driven by a motor to rotate and generate air to circulate hot air inside the cooking cavity.

[0003] Currently, the fans inside cooking equipment are all of fixed shaft length. On the one hand, different cooking equipment and platforms have different requirements for the same type of motor shaft length, so multiple motors with different shaft length specifications need to be prepared during the production and installation process, which leads to large inventory costs and affects production efficiency. On the other hand, most of these fans can only adjust the wind speed and air volume by adjusting the motor speed, and the adjustment range is relatively small. Summary of the Invention

[0004] Therefore, it is necessary to address the problems of high inventory costs, low production efficiency, and small adjustment range of current cooking equipment fans by providing a fan structure and cooking equipment that can be applied to different platforms of the same cooking equipment and has a relatively large adjustment range.

[0005] This application first provides a fan structure, including an inner liner, a motor, an adjusting component, and a fan. A fan cover is fixed to the inner wall of the cooking cavity of the inner liner to form a fan cavity between the fan cover and the inner wall of the cooking cavity. The fan cover has a through-hole for air outlet.

[0006] The motor is fixed to the outer wall of the inner liner, the drive shaft of the motor is connected to the rotor spline inside the motor, and the drive shaft passes through the inner liner to the fan cavity. The adjusting component is rotatably connected to the drive shaft and can drive the drive shaft to move along the axial direction.

[0007] The fan includes a fan disk and a first fan blade. The fan disk is located inside the fan cavity and is fixed to the drive shaft. The first fan blade is fixed to the side of the fan disk near the fan cover.

[0008] In one embodiment, the fan further includes a second fan blade fixed to the side of the fan disk away from the fan cover. The inner liner is also connected to an air intake port and an exhaust port that communicate with the outside. The air intake port communicates with the fan cavity and corresponds to the second fan blade along the axial direction of the drive shaft. A valve body capable of opening and closing the air intake port is provided inside the air intake port.

[0009] In one embodiment, an adjustment cavity is provided inside the housing of the motor, and the adjustment element is located inside the adjustment cavity and is sealed and fitted to the inner wall of the adjustment cavity, so as to divide the adjustment cavity into a first chamber and a second chamber along the axial direction of the drive shaft. The second chamber is connected to a transformer port for adjusting the internal pressure.

[0010] In one embodiment, the pressure port is connected to the inner liner via a pipeline.

[0011] In one embodiment, an adjustment cavity is provided inside the housing of the motor, and the outer peripheral wall of the adjustment member is threadedly connected to the inner peripheral wall of the adjustment cavity.

[0012] In one embodiment, the adjustment cavity has an opening on its side; a drive motor is also provided on the housing, and the drive gear of the drive motor is threadedly connected to the adjustment member through the opening.

[0013] In one embodiment, a pressure sensor electrically connected to the drive motor is disposed inside the inner liner.

[0014] In one embodiment, the fan structure further includes a limiting member, wherein the inner wall of the adjustment cavity is provided with a plurality of first limiting grooves spaced apart in the circumferential direction, and the outer wall of the adjusting member is provided with a plurality of second limiting grooves spaced apart in the circumferential direction.

[0015] When one of the first limiting grooves corresponds to the second limiting groove, the limiting member can be inserted between the two to restrict the adjustment member from rotating relative to the inner wall of the adjustment cavity.

[0016] In one embodiment, the inner wall of the adjustment cavity is provided with a first limiting groove arranged at equal intervals along the circumferential direction, and the outer wall of the adjustment member is provided with a second limiting groove arranged at equal intervals along the circumferential direction.

[0017] A second aspect of this application provides a cooking device including the fan structure described above.

[0018] The above-mentioned fan structure connects the drive shaft of the motor to the rotor spline and sets an adjustment component to adjust the movement of the drive shaft along the axial direction, so that the shaft length of the motor in this application can be adjusted. On the one hand, it can effectively improve the adjustment range of the internal circulation air volume and wind speed. On the other hand, it eliminates the need to pre-store motors with different shaft length specifications, effectively reducing inventory costs in the production process.

[0019] To improve the adjustment range of the internal air volume and wind speed, the fan structure of this application can change the distance between the fan disc and the fan cover by adjusting the shaft length, thereby controlling the air volume circulated by the fan at the same speed. Combined with different motor speeds (i.e., fan speeds), it can achieve the effect of controlling the internal air volume and wind speed within a larger range, thereby improving the adjustment range. Attached Figure Description

[0020] Figure 1 This is a perspective view of one embodiment of the fan structure of this application;

[0021] Figure 2 for Figure 1 A cross-sectional view along the AA direction;

[0022] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0023] Figure 4 This is a perspective view of the motor in another embodiment of the fan structure of this application;

[0024] Figure 5 for Figure 4 A sectional view;

[0025] Figure 6 This is a perspective view of the motor and fan in another embodiment of the fan structure of this application;

[0026] Figure 7 for Figure 6 A sectional view.

[0027] Reference numerals: 10, Inner liner; 11, Fan cover; 12, Fan cavity; 13, Air intake port; 14, Exhaust port; 20, Motor; 21, Drive shaft; 22, Rotor; 23, Adjustment chamber; 23a, First chamber; 23b, Second chamber; 23c, Transformer port; 23d, First limiting groove; 24, Drive motor; 24a, Drive gear; 30, Adjustment component; 40, Fan; 41, Fan disc; 42, First fan blade; 43, Second fan blade; 50, Limiting component. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] In the description of this invention, 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," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] Please combine Figure 1 , Figure 2 as well as Figure 3 As shown, this application first provides a fan structure, including an inner liner 10, a motor 20, an adjusting member 30, and a fan 40. A fan cover 11 is fixed to the inner wall of the cooking cavity of the inner liner 10 to form a fan cavity 12 between the fan cover 11 and the inner wall of the cooking cavity. The fan cover 11 has an air outlet. The motor 20 is fixed to the outer wall of the inner liner 10. The drive shaft 21 of the motor 20 is splinedly connected to the rotor 22 inside the motor 20. The drive shaft 21 passes through the inner liner 10 to the fan cavity 12. The adjusting member 30 is rotatably connected to the drive shaft 21 and can drive the drive shaft 21 to move along the axial direction. The fan 40 includes a fan disc 41 and a first fan blade 42. The fan disc 41 is located inside the fan cavity 12 and fixed to the drive shaft 21. The first fan blade 42 is fixed to the side of the fan disc 41 near the fan cover 11.

[0035] In this application, by spline-connecting the drive shaft 21 of the motor 20 to the rotor 22, and setting an adjusting member 30 for adjusting the movement of the drive shaft 21 along the axial direction, the shaft length of the motor 20 in this application can be adjusted. On the one hand, this can effectively improve the adjustment range of the circulating air volume and wind speed in the inner liner 10. On the other hand, it eliminates the need to pre-store motors 20 with different shaft length specifications, effectively reducing inventory costs in the production process.

[0036] Specifically, regarding the adjustment range of the circulating air volume and wind speed within the inner liner 10, the fan structure of this application can change the distance between the fan disc 41 and the fan cover 11 by adjusting the shaft length, thereby controlling the air volume circulated by the fan 40 at the same speed. Combined with different motor speeds 20 (i.e., fan 40 speeds), the circulating air volume and wind speed within the inner liner 10 can be controlled within a larger range, thereby achieving the effect of improving the adjustment range.

[0037] Please combine Figure 1 as well as Figure 2As shown, in some embodiments, the fan 40 also includes a second fan blade 43 fixed to the side of the fan disk 41 away from the fan cover 11. The inner liner 10 is also connected to an air intake port 13 and an exhaust port 14 that communicate with the outside. The air intake port 13 is connected to the fan cavity 12 and corresponds to the second fan blade 43 along the axial direction of the drive shaft 21. A valve body capable of opening and closing the air intake port 13 is provided inside the air intake port 13.

[0038] The inner liner 10 can be ventilated through the air inlet 13 and the exhaust outlet 14. The opening and closing of the air inlet 13 is controlled by the valve body. When the valve body is open and the air inlet 13 is connected to the outside, the motor 20 drives the second fan blade 43 located on the other side of the fan disc 41 to rotate. This generates negative pressure at the location of the second fan blade 43, thereby introducing outside air into the fan cavity 12 through the air inlet 13 to prevent steam from rushing out when the door is opened.

[0039] Based on this, by controlling the movement of the drive shaft 21, the distance between the fan plate 41 and the bottom wall of the cooking cavity can be changed, thereby changing the negative pressure space when the second fan blade 43 rotates, so as to change the air intake capacity. This allows the fan structure of this application to meet the usage needs of more scenarios, further improving the adjustability and versatility of the fan structure of this application.

[0040] Please combine Figure 1 as well as Figure 3 As shown, in some embodiments, an adjustment cavity 23 is provided inside the housing of the motor 20, and the adjustment member 30 is located inside the adjustment cavity 23 and is sealed and fitted to the inner wall of the adjustment cavity 23, so as to divide the adjustment cavity 23 into a first chamber 23a and a second chamber 23b along the axial direction of the drive shaft 21. The second chamber 23b is connected to a pressure regulating port 23c for adjusting the internal pressure.

[0041] The regulating chamber 23 is divided into two chambers by the regulating component 30, and the second chamber 23b is connected by the pressure transformer port 23c. Since the first chamber 23a is a closed chamber and the internal pressure remains constant, the regulating component 30 can be moved under the action of the pressure difference on both sides by adjusting the pressure in the second chamber 23b through the pressure transformer port 23c, thereby driving the drive shaft 21 to move and realizing the shaft length adjustment of the motor 20.

[0042] Of course, in other embodiments, the adjusting member 30 can also be driven and adjusted by other structures, such as mechanical transmission structure, hydraulic transmission structure, electromagnetic transmission structure, etc., as long as the adjusting member 30 can be controllably driven to move along the axial direction of the drive shaft 21. This application will not give examples of each one here.

[0043] In some embodiments, a sealing ring is embedded between the adjusting member 30 and the inner wall of the adjusting cavity 23 to improve the sealing performance between the two and ensure that the first cavity 23a and the second cavity 23b are two closed spaces.

[0044] Please combine Figure 1 as well as Figure 3 As shown, in some embodiments, the transformer port 23c is connected to the inner liner 10 via a pipeline.

[0045] This configuration allows the second chamber 23b to be connected to the inner liner 10 via the pressure port 23c and pipelines. The pressure in the second chamber 23b is synchronized with that in the inner liner 10, so that the pressure difference between the second chamber 23b and the first chamber 23a changes with the pressure inside the inner liner 10. This achieves linkage between the shaft length of the motor 20 and the internal pressure of the inner liner 10, and the size of the negative pressure space (i.e., the air intake capacity) between the fan plate 41 and the bottom wall of the cooking cavity changes with the pressure inside the inner liner 10, thereby achieving adaptive control of the amount of negative pressure.

[0046] Specifically, when the cooking equipment is working normally, the air vent 13 is closed. After working for a period of time, as the temperature inside the inner pot 10 increases and the amount of steam increases, the pressure inside the inner pot 10 increases, which in turn increases the pressure inside the second chamber 23b. The drive shaft 21 extends under the action of the adjusting component 30 and increases the size of the negative pressure space between the fan plate 41 and the bottom wall of the cooking cavity, thereby enhancing the air intake capacity. When the pressure inside the inner pot 10 reaches a certain level (before the cooking work is completed), the air vent 13 is opened. At this time, more air can be introduced than before, achieving a faster ventilation effect.

[0047] More specifically, as the drive shaft 21 moves with the pressure changes inside the inner liner 10, it can also be coordinated with different speeds of the motor 20 to further improve the adjustable range of the negative pressure evacuation volume.

[0048] Please combine Figure 4 as well as Figure 5 As shown, in some embodiments, an adjustment cavity 23 is provided inside the housing of the motor 20, and the outer peripheral wall of the adjustment member 30 is threadedly connected to the inner peripheral wall of the adjustment cavity 23, so that rotating the adjustment member 30 can cause it to move axially under the action of the thread on the inner wall of the adjustment cavity 23, thereby driving the drive shaft 21 to complete the extension and retraction.

[0049] Please combine Figure 6 as well as Figure 7 As shown, in some embodiments, the adjustment cavity 23 has an opening on its side; a drive motor 24 is also provided on the housing, and the drive gear 24a of the drive motor 24 is threadedly connected to the adjustment member 30 through the opening.

[0050] The extension and retraction of the drive shaft 21 of the motor 20 is achieved by the drive motor 24, so that the shaft length of the motor 20 can be freely controlled, thereby meeting different needs in different cooking scenarios and further improving the versatility of the fan structure of this application.

[0051] In some embodiments, a pressure sensor electrically connected to the drive motor 24 is provided inside the inner liner 10, so that the drive motor 24 can adaptively adjust the extension of the drive shaft 21 according to the pressure value inside the inner liner 10 detected by the pressure sensor, thereby changing the circulating air volume and negative pressure introduction volume inside the inner liner 10 and improving the automation level of the fan structure of this application.

[0052] Please combine Figure 4 as well as Figure 5 As shown, in some embodiments, the fan structure further includes a limiting member 50, and the inner wall of the adjusting cavity 23 is provided with a plurality of first limiting grooves 23d arranged at intervals along the circumferential direction, and the outer wall of the adjusting member 30 is provided with a plurality of second limiting grooves arranged at intervals along the circumferential direction.

[0053] When one of the first limiting grooves 23d corresponds to the second limiting groove, the limiting member 50 can be inserted between the two to restrict the adjustment member 30 from rotating relative to the inner wall of the adjustment cavity 23.

[0054] The limiting member 50 can achieve the limiting and locking between the adjusting member 30 and the motor 20 housing, preventing the subsequent rotation of the drive shaft 21 from causing the adjusting member 30 to rotate.

[0055] Please combine Figure 4 as well as Figure 5 As shown, in some embodiments, the inner wall of the adjusting cavity 23 is provided with six first limiting grooves 23d arranged at equal intervals along the circumferential direction, and the outer wall of the adjusting member 30 is provided with six second limiting grooves arranged at equal intervals along the circumferential direction.

[0056] Taking the first limiting groove 23d and the second limiting groove with equal spacing as an example, the minimum movement of the adjusting member 30 is the pitch of the threaded connection divided by the number of slots. Therefore, the more slots the first limiting groove 23d and the second limiting groove have, the smaller the minimum movement of the adjusting member 30 and the higher the adjustment accuracy.

[0057] In this embodiment, six first limiting grooves 23d and two limiting grooves are selected, which can meet the adjustment needs in most cases and take into account the requirements of processing difficulty, part strength and adjustment accuracy. Of course, in other embodiments, the number and position of the grooves can be changed according to actual needs, and this application does not make further limitations here.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0059] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A fan structure, characterized in that, The device includes an inner pot (10), a motor (20), an adjusting component (30), and a fan (40). The inner wall of the cooking cavity of the inner pot (10) is fixed with a fan cover (11) to form a fan cavity (12) between the fan cover (11) and the inner wall of the cooking cavity. The fan cover (11) has an air outlet through it. The motor (20) is fixed to the outer wall of the inner liner (10). The drive shaft (21) of the motor (20) is splinedly connected to the rotor (22) inside the motor (20). The drive shaft (21) passes through the inner liner (10) to the fan cavity (12). The adjusting member (30) is rotatably connected to the drive shaft (21) and can drive the drive shaft (21) to move along the axial direction. The fan (40) includes a fan disk (41) and a first fan blade (42). The fan disk (41) is located inside the fan cavity (12) and is fixed to the drive shaft (21). The first fan blade (42) is fixed to the fan disk (41) on the side near the fan cover (11). The fan (40) also includes a second fan blade (43) fixed to the side of the fan disc (41) away from the fan cover (11). The inner liner (10) is also connected to an air intake port (13) and an exhaust port (14) that communicate with the outside. The air intake port (13) is connected to the fan cavity (12) and corresponds to the second fan blade (43) along the axial direction of the drive shaft (21). A valve body capable of opening and closing the air intake port (13) is provided inside the air intake port (13). The motor (20) has an adjustment cavity (23) inside its housing. The adjustment member (30) is located inside the adjustment cavity (23) and is sealed to the inner wall of the adjustment cavity (23) to divide the adjustment cavity (23) into a first chamber (23a) and a second chamber (23b) along the axial direction of the drive shaft (21). The second chamber (23b) is connected to a pressure regulating port (23c) for adjusting the internal pressure.

2. The fan structure according to claim 1, characterized in that, The transformer port (23c) is connected to the inner liner (10) via a pipeline.

3. A cooking device, characterized in that, Includes the fan structure as described in any one of claims 1 to 2.

Images