Fan structure and cooking equipment

Abstract

The invention relates to a fan structure and cooking equipment. The fan structure comprises an inner container, a motor, an adjusting part and a fan, a fan cover is fixed to the inner wall of a cooking cavity of the inner container, a fan cavity is formed between the fan cover and the inner wall of the cooking cavity, and air outlet holes are formed in the fan cover in a penetrating mode; the motor is fixed to the outer wall of the inner container, a driving shaft of the motor is connected with a rotor spline in the motor, the driving shaft penetrates through the inner container into the fan cavity, and the adjusting part is rotationally connected with the driving shaft and can drive the driving shaft to move in the axis direction; the fan comprises a fan disc and first fan blades, the fan disc is located in the fan cavity and fixed to the driving shaft, and the first fan blades are fixed to the side, close to the fan cover, of the fan disc; the driving shaft of the motor is connected with the rotor spline, and the adjusting piece is arranged for adjusting the driving shaft to move in the axis direction, so that the shaft length of the motor can be adjusted, the adjusting range of the circulating air volume and the air speed in the inner container can be effectively improved, and the inventory cost in the production process is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field related to cooking equipment, and in particular to a fan structure and cooking equipment. Background Art

[0002] Ovens, steam ovens and other cooking appliances are usually equipped with fans, which are driven by motors to rotate fan blades to achieve hot air circulation inside the inner cooking cavity.

[0003] At present, the fans installed inside cooking equipment all have fixed shaft lengths. On the one hand, different cooking equipment on different platforms require different shaft lengths for the same series of motors, so a variety of motors with different shaft lengths need to be prepared during the production and installation process, which leads to high 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] Based on this, it is necessary to provide 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 to address the problems of high inventory costs, low production efficiency, and small adjustment range of fans in current cooking equipment.

[0005] The present application first provides a fan structure, comprising an inner pot, a motor, an adjusting member and a fan, wherein a fan cover is fixed to the inner wall of a cooking cavity of the inner pot to form a fan cavity between the fan cover and the inner wall of the cooking cavity, and an air outlet is opened through the fan cover;

[0006] The motor is fixed to the outer wall of the inner tank, the driving shaft of the motor is spline-connected to the rotor in the motor, and the driving shaft passes through the inner tank to the fan cavity, and the adjusting member is rotatably connected to the driving shaft and can drive the driving shaft to move along the axial direction;

[0007] The fan comprises a fan disc and a first fan blade. The fan disc is located in the fan cavity and is fixed to the driving shaft. The first fan blade is fixed to a side of the fan disc close to the fan cover.

[0008] In one embodiment, the fan also includes a second fan blade fixed to a side of the fan disc away from the fan cover, and the inner tank is also connected to an air inlet and an exhaust port connected to the outside, the air inlet is connected to the fan cavity and corresponds to the second fan blade along the axial direction of the drive shaft, and a valve body capable of opening and closing the air inlet is provided in the air inlet.

[0009] In one embodiment, an adjustment chamber is opened in the housing of the motor, and the adjustment member is located in the adjustment chamber and sealed to the inner wall of the adjustment chamber to separate the adjustment chamber into a first chamber and a second chamber along the axial direction of the drive shaft, and the second chamber is connected to a transformer port for adjusting the internal pressure.

[0010] In one of the embodiments, the voltage transformation port is connected to the inner tank through a pipeline.

[0011] In one of the embodiments, an adjustment cavity is provided in 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 of the embodiments, the side of the adjustment chamber has an opening; a driving motor is also provided on the shell, and a driving gear of the driving motor is threadedly connected to the adjustment member through the opening.

[0013] In one of the embodiments, a pressure sensor electrically connected to the driving motor is disposed in the inner container.

[0014] In one embodiment, the fan structure further comprises a limiting member, the inner wall of the adjusting 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 limit 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 the first limiting grooves arranged at equal intervals along the circumferential direction, and the outer wall of the adjustment member is provided with the second limiting grooves arranged at equal intervals along the circumferential direction.

[0017] A second aspect of the present application provides a cooking device, comprising the above-mentioned fan structure.

[0018] The fan structure is configured such that the shaft length of the motor in the present application can be adjusted by spline-connecting the drive shaft of the motor with the rotor and providing an adjusting member for adjusting the movement of the drive shaft along the axial direction. On the one hand, the adjustment range of the circulating air volume and wind speed in the inner tank can be effectively improved. On the other hand, there is no need to pre-store motors with different shaft length specifications, which effectively reduces the inventory cost in the production process.

[0019] In order to increase the adjustment range of the circulating air volume and wind speed in the inner tank, the fan structure of the present application can change the distance between the fan disk and the fan cover by adjusting the shaft length, thereby controlling the air volume circulated by the fan at the same speed, and then combined with different motor speeds (i.e., fan speeds) to achieve control of the circulating air volume and wind speed in the inner tank within a larger range, thereby achieving the effect of increasing the adjustment range. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of one embodiment of the fan structure of the present application;

[0021] Figure 2 for Figure 1 Sectional view in the AA direction;

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

[0023] Figure 4 A three-dimensional diagram of a motor in another embodiment of the fan structure of the present application;

[0024] Figure 5 for Figure 4 A cross-sectional view of

[0025] Figure 6 A three-dimensional diagram of a motor and a fan in another embodiment of the fan structure of the present application;

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

[0027] Figure numerals: 10, inner tank; 11, fan cover; 12, fan chamber; 13, air inlet; 14, exhaust port; 20, motor; 21, drive shaft; 22, rotor; 23, adjustment chamber; 23a, first chamber; 23b, second chamber; 23c, transformer port; 23d, first limit groove; 24, drive motor; 24a, drive gear; 30, adjustment member; 40, fan; 41, fan disk; 42, first fan blade; 43, second fan blade; 50, limit member. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Please combine Figure 1 , Figure 2 as well as Figure 3 As shown, the present application first provides a fan structure, including an inner pot 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 pot 10 to form a fan cavity 12 between the fan cover 11 and the inner wall of the cooking cavity, and the fan cover 11 is provided with an air outlet; the motor 20 is fixed to the outer wall of the inner pot 10, the driving shaft 21 of the motor 20 is spline-connected with the rotor 22 in the motor 20, and the driving shaft 21 passes through the inner pot 10 to the fan cavity 12, the adjusting member 30 is rotatably connected with the driving shaft 21 and can drive the driving 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 in the fan cavity 12 and is fixed to the driving shaft 21, and the first fan blade 42 is fixed to the fan disk 41 on the side close to the fan cover 11.

[0035] In the present application, the drive shaft 21 of the motor 20 is spline-connected with the rotor 22, and an adjusting member 30 is provided for adjusting the movement of the drive shaft 21 along the axial direction, so that the axial length of the motor 20 in the present application can be adjusted. On the one hand, the adjustment range of the circulating air volume and wind speed in the inner tank 10 can be effectively improved. On the other hand, there is no need to pre-store motors 20 with different axial length specifications, which effectively reduces the inventory cost in the production process.

[0036] Specifically, in order to increase the adjustment range of the circulating air volume and wind speed in the inner tank 10, the fan structure of the present application can change the distance between the fan disk 41 and the fan cover 11 by adjusting the axial length, thereby controlling the air volume circulated by the fan 40 at the same speed, and then cooperate with different motor 20 speeds (i.e., fan 40 speed) to achieve the control of the circulating air volume and wind speed in the inner tank 10 within a larger range, thereby achieving the effect of increasing 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 disc 41 away from the fan cover 11, and the inner tank 10 is also connected to an air inlet 13 and an exhaust port 14 connected to the outside. The air inlet 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 inlet 13 is provided in the air inlet 13.

[0038] The inner tank 10 can be ventilated through the air inlet 13 and the exhaust port 14; the opening and closing of the air inlet 13 is controlled by the valve body. When the valve body is opened 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, which can generate negative pressure at the position of the second fan blade 43, thereby introducing outside air into the fan chamber 12 through the air inlet 13, so as to achieve the effect of preventing steam from blowing in the face when the door is opened.

[0039] On this basis, by controlling the movement of the drive shaft 21, the distance between the fan disk 41 and the bottom wall of the cooking chamber can be changed, thereby changing the negative pressure space when the second fan blade 43 rotates, so as to achieve the effect of changing the air intake capacity, so that the fan structure of the present application can meet the usage requirements of more scenarios, further improving the adjustability and versatility of the fan structure of the present application.

[0040] Please combine Figure 1 as well as Figure 3 As shown, in some embodiments, an adjusting chamber 23 is opened in the shell of the motor 20, and the adjusting member 30 is located in the adjusting chamber 23 and sealed to the inner wall of the adjusting chamber 23 to separate the adjusting chamber 23 into a first chamber 23a and a second chamber 23b along the axial direction of the driving shaft 21, and the second chamber 23b is connected to a voltage transformer 23c for adjusting the internal pressure.

[0041] The regulating chamber 23 is separated by the regulating member 30 to form two chambers, and then connected to the second chamber 23b through the voltage-changing port 23c. Since the first chamber 23a is a closed chamber, the internal pressure remains unchanged. Therefore, it is only necessary to adjust the pressure in the second chamber 23b through the voltage-changing port 23c to move the regulating member 30 under the action of the pressure difference on both sides, thereby driving the driving shaft 21 to move and realizing the shaft length adjustment of the motor 20.

[0042] Of course, in some other embodiments, the adjusting member 30 can also be driven and adjusted by other structures, such as a mechanical transmission structure, a hydraulic transmission structure, an electromagnetic transmission structure, etc., as long as the adjusting member 30 can be controllably driven to move along the axial direction of the driving shaft 21. The present application does not give examples one by 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 voltage transformation port 23c is connected to the inner tank 10 through a pipeline.

[0045] It is configured in this way so that the second chamber 23b is connected to the inner pot 10 through the pressure changing port 23c and the pipeline, and the pressure in the second chamber 23b is synchronized with the inner pot 10, so that the pressure difference between the second chamber 23b and the first chamber 23a will change with the change of the pressure in the inner pot 10, thereby realizing the linkage between the shaft length of the motor 20 and the internal pressure of the inner pot 10, so that the size of the negative pressure space between the fan disc 41 and the bottom wall of the cooking cavity (i.e., the air entrainment capacity) changes with the change of the pressure in the inner pot 10, thereby realizing adaptive control of the amount caused by negative pressure.

[0046] Specifically, when the cooking equipment is working normally, the air inlet 13 is in a closed state. After working for a period of time, as the temperature in the inner pot 10 increases and the amount of steam increases, the pressure in the inner pot 10 increases, thereby causing the pressure in the second chamber 23b to increase synchronously. The drive shaft 21 extends out under the action of the adjustment member 30 and increases the size of the negative pressure space between the fan disc 41 and the bottom wall of the cooking cavity, thereby enhancing the air intake capacity; when a certain pressure is reached in the inner pot 10 (before the cooking work is completed), the air inlet 13 is opened, and more air can be introduced at this time than before, achieving a faster ventilation effect.

[0047] More specifically, when the driving shaft 21 moves with the pressure change in the inner liner 10, it can also cooperate with the different rotation speeds of the motor 20 to further increase the adjustable range of the negative pressure air intake volume.

[0048] Please combine Figure 4 as well as Figure 5 As shown, in some embodiments, an adjustment chamber 23 is opened in the shell 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 chamber 23, so that the adjustment member 30 can be rotated to move axially under the action of the inner wall thread of the adjustment chamber 23, thereby driving the drive shaft 21 to complete extension and retraction.

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

[0050] The drive shaft 21 of the motor 20 is driven by the drive motor 24 to complete the extension and retraction, 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 the present application.

[0051] In some embodiments, a pressure sensor electrically connected to the drive motor 24 is provided in the inner tank 10, so that the drive motor 24 can adaptively adjust the extension amount of the drive shaft 21 according to the pressure value in the inner tank 10 detected by the pressure sensor, so as to change the circulating air volume and the amount of negative pressure introduced in the inner tank 10, thereby improving the degree of automation of the fan structure of the present 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, the inner wall of the adjustment cavity 23 is provided with a plurality of first limiting grooves 23d spaced apart in the circumferential direction, and the outer wall of the adjustment member 30 is provided with a plurality of second limiting grooves spaced apart in the circumferential direction;

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

[0054] The limiting member 50 can realize the limiting locking between the adjusting member 30 and the housing of the motor 20 , thereby preventing the subsequent rotation of the driving shaft 21 from driving 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 adjustment cavity 23 is provided with 6 first limiting grooves 23d arranged at equal intervals along the circumferential direction, and the outer wall of the adjustment member 30 is provided with 6 second limiting grooves arranged at equal intervals along the circumferential direction.

[0056] Taking the first limiting groove 23d and the second limiting groove 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 there are in the first limiting groove 23d and the second limiting groove, the smaller the minimum movement of the adjusting member 30 is, and the higher the adjustment accuracy is.

[0057] In this embodiment, six first limit grooves 23d and six second limit grooves are selected to meet the adjustment requirements in most cases, taking into account the processing difficulty, component strength, adjustment accuracy and other requirements; of course, in some other embodiments, the number and position of the grooves can also be changed according to actual needs, and this application does not make further limitations here.

[0058] 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.

[0059] 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 structure, characterized in that: The cooking pot comprises an inner pot (10), a motor (20), an adjusting member (30) and a fan (40); a fan cover (11) is fixed to the inner wall of a cooking cavity of the inner pot (10) to form a fan cavity (12) between the fan cover (11) and the inner wall of the cooking cavity; and an air outlet hole is provided through the fan cover (11); The motor (20) is fixed to the outer wall of the inner container (10), the drive shaft (21) of the motor (20) is spline-connected to the rotor (22) in the motor (20), and the drive shaft (21) passes through the inner container (10) to the fan chamber (12), and the adjustment 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) comprises a fan disc (41) and a first fan blade (42); the fan disc (41) is located in the fan cavity (12) and is fixed to the drive shaft (21); and the first fan blade (42) is fixed to a side of the fan disc (41) close to the fan cover (11).

2. The fan structure according to claim 1, characterized in that: The fan (40) further comprises a second blade (43) fixed to a side of the fan disc (41) away from the fan cover (11); the inner tank (10) is further provided with an air inlet (13) and an exhaust port (14) connected to the outside; the air inlet (13) is connected to the fan chamber (12) and corresponds to the second blade (43) along the axial direction of the drive shaft (21); a valve body capable of opening and closing the air inlet (13) is provided in the air inlet (13).

3. The fan structure according to claim 2, characterized in that: An adjusting chamber (23) is provided in the housing of the motor (20); the adjusting member (30) is located in the adjusting chamber (23) and is sealed to the inner wall of the adjusting chamber (23) so as to separate the adjusting chamber (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-changing port (23c) for adjusting the internal pressure.

4. The fan structure according to claim 3, characterized in that: The voltage-changing port (23c) is connected to the inner container (10) via a pipeline.

5. The fan structure according to claim 2, characterized in that: An adjusting cavity (23) is provided in the housing of the motor (20), and the outer peripheral wall of the adjusting member (30) is threadedly connected to the inner peripheral wall of the adjusting cavity (23).

6. The fan structure according to claim 5, characterized in that: The side of the regulating chamber (23) has an opening; the housing is also provided with a driving motor (24), and a driving gear (24a) of the driving motor (24) is threadedly connected to the regulating member (30) through the opening.

7. The fan structure according to claim 6, characterized in that: A pressure sensor electrically connected to the drive motor (24) is arranged in the inner container (10).

8. The fan structure according to claim 5, characterized in that: The fan structure also includes a limiting member (50), the inner wall of the regulating cavity (23) is provided with a plurality of first limiting grooves (23d) arranged at intervals in the circumferential direction, and the outer wall of the regulating member (30) is provided with a plurality of second limiting grooves arranged at intervals in the circumferential direction; 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 limit the adjustment member (30) from rotating relative to the inner wall of the adjustment cavity (23).

9. The fan structure according to claim 8, characterized in that: The inner wall of the adjustment cavity (23) is provided with six first limiting grooves (23d) arranged at equal intervals in the circumferential direction, and the outer wall of the adjustment member (30) is provided with six second limiting grooves arranged at equal intervals in the circumferential direction.

10. A cooking device, characterized in that: It comprises the fan structure as claimed in any one of claims 1 to 9.

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