An oven using a brushless direct current motor

Abstract

The utility model belongs to oven technical field, especially point to a kind of oven of application brushless DC motor, comprising: casing, inner container is equipped in casing, and cooking inner cavity is shaped in inner container;Heating assembly is set on inner container;Fan, it is fixed on casing;Fan is driven with the rotation shaft of being threaded in the inner container, rotation shaft is connected with fan blade;The fan is brushless DC motor, and the fan blade is driven by the fan and is forward or reverse rotation.This patent in fan assembly since it is brushless DC motor, it can drive the fan blade forward or reverse rotation, user can make fan assembly more uniform by the forward and reverse rotation of fan blade, or by program control to carry out air outlet according to the demand of user, to satisfy the different cooking needs of user.

Description

Technical Field

[0001] This utility model belongs to the field of oven technology, specifically referring to an oven that uses a brushless DC motor. Background Technology

[0002] Referring to the oven inner liner, oven inner liner manufacturing process and oven disclosed in Chinese Invention Application 2020107608263, the fan assembly in the oven is fixed to the oven inner liner by the fan assembly bracket, and hot air is delivered for baking by the rotation of the fan assembly.

[0003] However, existing fan assemblies rotate in one direction only, which can cause uneven heating of food in the oven during baking, affecting the baking effect. Furthermore, steam from the oven can easily enter the fan assembly along the motor shaft, causing water to seep into the fan assembly and potentially damaging the motor. Summary of the Invention

[0004] The purpose of this invention is to provide an oven that uses a brushless DC motor to effectively improve the baking effect.

[0005] The purpose of this utility model is achieved as follows:

[0006] An oven using a brushless DC motor includes:

[0007] The casing has an inner liner inside, and the inner liner has a cooking cavity formed inside.

[0008] The heating element is located on the inner liner;

[0009] A fan is fixed to the casing; the fan drives a rotating shaft that passes through the inner liner, and fan blades are connected to the rotating shaft.

[0010] The fan is a brushless DC motor, which drives the fan blades to rotate forward or in reverse.

[0011] Furthermore, the fan is provided with an extension, and the extension has a rotating cavity for accommodating the rotating shaft; the rotating cavity is provided with a first sealing ring, which is sleeved on the outside of the rotating shaft and abuts against the inner wall of the rotating cavity.

[0012] Furthermore, the rotating cavity of the extension is provided with an inner boss, and the inner boss is provided with a first through hole for the rotating shaft to pass through. The first sealing ring is located on one side of the inner boss, and the other side of the first sealing ring is provided with a bearing component connected to the rotating shaft.

[0013] Furthermore, the inner liner is provided with a transition hole for the rotating shaft to pass through, the fan is provided with a sealing boss, and a second sealing ring is provided at the end of the sealing boss, which abuts against the edge of the transition hole.

[0014] Furthermore, the fan blade includes a circular base plate and a spoiler plate fixed on the circular base plate, and the spoiler plate is provided with several folded blade sections in the circumferential direction.

[0015] Furthermore, the fan blade has a D-shaped hole at its center, and the end of the rotating shaft has a threaded portion that passes through the D-shaped hole and is fixed by a nut.

[0016] Furthermore, the inner liner is recessed with a heating section, the heating section is provided with a heating cover, and the heating cover is provided with several air outlets; the heating assembly is located in the heating section, the rotating shaft passes through the heating section, and the fan blade is located in the heating section.

[0017] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0018] The fan assembly in this patent uses a second sealing ring to prevent debris from entering, and a first sealing ring and bearing components to prevent most of the steam from entering the fan assembly, effectively ensuring its normal operation. Furthermore, because the fan assembly in this patent uses a brushless DC motor, it can drive the fan blades to rotate forward or backward. Users can adjust the fan blade rotation to ensure more even airflow, or use program control to customize the rotation according to their cooking needs.

[0019] The method of splicing and connecting the circular substrate and the spoiler in this patent is actually more convenient to manufacture. The substrate is used to seal the openings on the spoiler caused by the folding blades, so as to prevent air leakage when the fan blades rotate in both directions. Attached Figure Description

[0020] Figure 1 This is a structural diagram of an oven.

[0021] Figure 2 This is a diagram illustrating an oven explosion.

[0022] Figure 3 This is a structural diagram of the fan assembly in the oven.

[0023] Figure 4 This is a structural diagram of the wind turbine assembly.

[0024] Figure 5 This is a schematic diagram of the fan blade structure.

[0025] The meaning of the labels in the diagram:

[0026] 1. Housing; 11. Mounting plate;

[0027] 2. Inner pot; 21. Cooking cavity; 22. Adapter hole; 23. Heating unit; 24. Heating cover; 25. Vent;

[0028] 3. Heating components;

[0029] 4. Fan assembly; 41. Rotating shaft;

[0030] 42. Fan blade; 421. Circular base plate; 422. Spoiler; 423. Folding section; 424. Threaded hole;

[0031] 43. Main body;

[0032] 44. Extension; 441. Rotating cavity; 442. Inner boss; 443. First through hole; 444. Sealing boss; 445. Second sealing ring; 45. First sealing ring; 46. Bearing component; 47. Threaded part; 48. Mounting bracket; Detailed Implementation

[0033] The present invention will be further described below with reference to specific embodiments:

[0034] An oven using a brushless DC motor includes a casing 1, an inner cavity 2, a heating element 3, and a fan assembly 4, such as... Figure 1 As shown, the oven in this patent is a steam oven. The casing 1 is square with an opening on one side. The inner liner 2 is located inside the casing 1, and a cooking cavity 21 is formed in the inner liner 2 for placing food to be cooked. The opening on one side of the casing 1 is for installing the oven door, which is omitted in the drawings for ease of explanation. The heating element 3 is disposed on the inner liner 2, and the fan assembly 4 is fixed to the casing 1. The fan assembly 4 drives a rotating shaft 41 that passes through the inner liner 2, and fan blades 42 are connected to the rotating shaft 41.

[0035] Combination Figure 1 , 2 As shown, Figure 2 The image only shows a portion of the casing 1 and the inner pot 2; specifically, only the rear and upper sides of the casing 1 and the rear side of the inner pot 2 are shown. The heating assembly 3 is located on the rear side of the inner pot 2 and includes an annular heating tube. Correspondingly, a heating section 23 is recessed rearward on the rear side of the inner pot 2. A heating cover 24 is detachably mounted on the heating section 23, and the heating cover 24 has several ventilation holes 25. The heating assembly 3 is located in the heating section 23, that is, the heating tube is located in the recessed cavity on the rear side of the inner pot 2 and is sealed by the heating cover 24 to prevent the heating tube from contacting the food located in the cooking cavity 21.

[0036] In fact, the housing 1 also includes a mounting plate 11 fixed to the housing 1. The left and right ends of the mounting plate 11 are fixed to the left and right sides of the housing 1 by fasteners. The mounting plate 11 has a mounting hole in its center. A mounting bracket 48 is provided on the fan assembly 4. The fan assembly 4 is fixed to the mounting plate 11 by the mounting bracket 48, and the fan assembly 4 is opposite to the heating part 23. The heating part 23 has a transition hole 22 in its center for the rotating shaft 41 to pass through. The rotating shaft 41 of the fan assembly 4 passes through the transition hole 22 into the heating part 23 and is sealed by the heating cover 24. The rotating shaft 41 of the fan assembly 4 is connected to a fan blade 42. The rotating shaft 41 drives the fan blade 42 to rotate to generate airflow, thereby increasing the baking effect.

[0037] In this patent, the fan assembly 4 is a brushless DC motor, which drives the fan blades 42 to rotate forward or backward. Combined with... Figure 4 , 5 As shown, the fan assembly 4 includes a main body 43, within which a stator rotor and a rotating shaft 41 connecting the rotor are provided. Furthermore, the main body 43 also includes a control circuit for controlling the forward and reverse rotation of the fan assembly 4. This control circuit enables the forward and reverse rotation of the rotating shaft 41, thereby controlling the forward and reverse rotation of the fan blades 42. An extension 44 is provided on one side of the main body 43, extending along the axial direction of the main body 43. The mounting bracket 48 is provided outside the extension 44, and a rotating cavity 441 is provided inside the extension 44 to accommodate the rotating shaft 41. The rotating shaft 41 is arranged along the rotating cavity 441 and extends outward into the inner liner 2.

[0038] In this patent, a first sealing ring 45 is provided in the rotating cavity 441, and the first sealing ring 45 is sleeved outside the rotating shaft 41 and abuts against the inner wall of the rotating cavity 441. Figure 3 As shown, the rotating cavity 441 of the extension 44 is provided with an inner boss 442, and the inner boss 442 is provided with a first through hole 443 for the rotating shaft 41 to pass through. The first sealing ring 45 is located on one side of the inner boss 442, and the other side of the first sealing ring 45 is provided with a bearing member 46 connected to the rotating shaft 41. At this time, the first sealing ring 45 is positioned between the bearing member 46 and the inner boss 442. The first sealing ring 45 can be made of plastic material, which seals the first through hole 443 of the inner boss 442 and makes slight contact with the rotating shaft 41 to achieve a seal, so as to prevent water vapor in the inner liner 2 from entering the fan assembly 4 along the rotating shaft 41 and preventing it from affecting the normal use of the fan assembly 4.

[0039] Furthermore, the fan assembly 4 is provided with a sealing boss 444, and a second sealing ring 445 is provided at the end of the sealing boss 444, which abuts against the edge of the transition hole 22. Figure 3 , 4 As shown, the sealing boss 444 is disposed on the end of the extension 44 and is circular; the sealing boss 444 is made of soft rubber material, which covers the end of the sealing boss 444 and abuts against the edge of the adapter hole 22 to seal the gap between the fan assembly 4 and the inner liner 2, so as to prevent debris from entering the fan assembly 4 from the gap between the fan assembly 4 and the inner liner 2.

[0040] At this point, the fan assembly 4 in this patent uses a second sealing ring 445 to prevent debris from entering the fan assembly 4, and the first sealing ring 45 and bearing 46 prevent most of the steam from entering the fan assembly 4, effectively ensuring the normal operation of the fan assembly 4. Furthermore, since the fan assembly 4 in this patent is a brushless DC motor, it can drive the fan blades 42 to rotate forward or backward. Users can make the airflow from the fan assembly 4 more even by rotating the fan blades 42 forward or backward, or control the airflow forward or backward according to the user's needs through program control, thus meeting different cooking requirements.

[0041] Furthermore, the fan blade 42 includes a circular base plate 421 and a spoiler 422 fixed on the circular base plate 421, the spoiler 422 having a plurality of folding blades 423 circumferentially arranged. Figure 5 As shown, the folded blade portion 423 on the spoiler 422 can be obtained by stamping. Compared with directly welding the folded blade portion 423 onto the substrate, the splicing connection method between the circular substrate 421 and the spoiler 422 in this patent is actually more convenient to manufacture. The substrate is used to seal the opening on the spoiler 422 caused by the folded blade portion 423, thereby preventing air leakage when the fan blade 42 rotates in both directions. The center of the fan blade 42 is provided with a D-shaped hole 424, and the end of the rotating shaft 41 is provided with a threaded portion 47. The threaded portion 47 passes through the D-shaped hole 424 and is fixed by a nut, thereby achieving quick connection.

[0042] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

[0043] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0044] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0045] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

Claims

1. An oven using a brushless DC motor, characterized by comprising: include: The casing (1) has an inner liner (2) inside, and a cooking cavity (21) is formed in the inner liner (2). Heating component (3) is installed on the inner liner (2); A fan assembly (4) is fixed on the housing (1); the fan assembly (4) drives a rotating shaft (41) that passes through the inner liner (2), and a fan blade (42) is connected to the rotating shaft (41); The fan assembly (4) is a brushless DC motor, which drives the fan blades (42) to rotate forward or in reverse.

2. An oven using a brushless DC motor according to claim 1, characterized in that: The fan assembly (4) is provided with an extension (44), and the extension (44) is provided with a rotating cavity (441) for accommodating the rotating shaft (41); the rotating cavity (441) is provided with a first sealing ring (45), which is sleeved on the outside of the rotating shaft (41) and abuts against the inner wall of the rotating cavity (441).

3. An oven using a brushless DC motor according to claim 2, characterized in that: The extension (44) has an inner boss (442) in its rotating cavity (441), and the inner boss (442) has a first through hole (443) through which the rotating shaft (41) passes. The first sealing ring (45) is located on one side of the inner boss (442), and the other side of the first sealing ring (45) has a bearing (46) connected to the rotating shaft (41).

4. An oven using a brushless DC motor according to any one of claims 1 to 3, characterized in that: The inner liner (2) is provided with a transition hole (22) for the rotating shaft (41) to pass through. The fan assembly (4) is provided with a sealing boss (444). A second sealing ring (445) is provided at the end of the sealing boss (444). The second sealing ring (445) abuts against the edge of the transition hole (22).

5. The oven using a brushless DC motor according to claim 1, wherein: The fan blade (42) includes a circular base plate (421) and a spoiler (422) fixed on the circular base plate (421). The spoiler (422) has several folded blades (423) arranged circumferentially.

6. An oven using a brushless DC motor according to claim 5, characterized in that: The fan blade (42) has a D-shaped hole (424) at its center, and the end of the rotating shaft (41) has a threaded part (47). The threaded part (47) passes through the D-shaped hole (424) and is fixed by a nut.

7. The oven using a brushless DC motor according to claim 1, wherein: The inner liner (2) is recessed and has a heating part (23), which is provided with a heating cover (24) and a plurality of air outlets (25). The heating component (3) is located in the heating part (23), the rotating shaft (41) passes through the heating part (23), and the fan blade (42) is located in the heating part (23).

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