Drawer type microwave oven and control method

Abstract

The invention relates to the technical field of household appliances, and provides a drawer type microwave oven and a control method.The drawer type microwave oven comprises a cavity, a drawer and a motor, the drawer is connected with the cavity, and the motor is used for driving the drawer to move in the front-back direction relative to the cavity; the control method comprises the step of controlling the motor to drive the drawer to move at a constant speed in the whole opening and / or closing process. According to the drawer type microwave oven and the control method, firstly, inertial impact caused by acceleration change is avoided, noise and vibration are reduced, the movement stability of the drawer is improved, and the service life is prolonged; 2, articles in the microwave oven can be prevented from falling or colliding due to inertia due to sudden change of the speed by uniform-speed movement, and the safety is improved; the efficiency of the motor is higher under the condition of uniform-speed motion, and energy waste caused by frequent starting and stopping or speed changing is reduced; and 4, the control logic is simple, and the complexity and development cost of the control system are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a drawer-type microwave oven and a control method thereof. Background Art

[0002] With the increasing demand for kitchen appliance integration and space optimization, drawer-type microwave ovens have gradually become an important equipment in modern homes and commercial kitchens due to their embedded installation and space-saving features.

[0003] The patent with application number CN201910500741.9 in the prior art discloses a control method for household appliances, household appliances and readable storage media, including a household appliance including a cavity, a drawer connected to the cavity and a motor driving the drawer to move back and forth relative to the cavity. The moving stroke of the drawer includes a first stroke, a second stroke and a third stroke. The first stroke is the starting section of the closing stroke of the drawer or the ending section of the opening stroke of the drawer. The second stroke is the middle section of the closing stroke or the opening stroke, and the third stroke is the ending section of the closing stroke or the starting section of the opening stroke. The control method includes: controlling the motor to drive the drawer to move in the first stroke with a first torque; controlling the motor to drive the drawer to move in the second stroke with a second torque; controlling the motor to drive the drawer to move in the third stroke with a third torque; wherein the third torque is greater than the second torque and the first torque. Although the patent can ensure the smooth opening and closing of the drawer, the drawer may change significantly at different stages during the opening and closing process, resulting in the drawer shaking, stuttering, and shaking left and right during the opening and closing process. The stability of the drawer during the opening and closing process is poor; the sudden change in speed causes the items (such as tableware and food) in the microwave oven to fall or collide due to inertia, and the safety is low.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a drawer-type microwave oven and a control method thereof, so as to solve the problems in the prior art that the drawer of the drawer-type microwave oven shakes left and right during the process of opening and closing the door, the drawer has poor stability during the process of opening and closing the door, and the sudden change in speed causes the objects (such as tableware, food) in the microwave oven to topple over or collide due to inertia, resulting in low safety.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A control method for a drawer-type microwave oven, the drawer-type microwave oven comprising: a cavity, a drawer and a motor, the drawer being connected to the cavity, the motor being used to drive the drawer to move in a front-rear direction relative to the cavity,

[0008] The control method comprises:

[0009] Control the motor to drive the drawer to move at a constant speed during the entire opening and / or closing process.

[0010] Furthermore, the control method specifically includes the following steps:

[0011] S1. The drawer-type microwave oven is powered on;

[0012] S2. Determine whether to open or close the drawer according to the user's instruction. If it is to open, go to step S3; if it is to close, go to step S4;

[0013] S3. Control the motor to open the drawer, and the drawer moves at a constant speed during the entire opening process;

[0014] S4. Control the motor to close the drawer, and the drawer moves at a constant speed during the entire closing process.

[0015] Furthermore, the control method specifically includes the following steps:

[0016] S5. Determine whether a stop instruction is received. If so, go to step S8; if not, go to step S6;

[0017] S6. Obtain the action time t of the motor;

[0018] S7. Determine whether the action time t of the motor > the preset time threshold T. If so, go to step S8; if not, maintain the original state;

[0019] S8. Control the motor to stop moving.

[0020] Furthermore, the value range of the preset time threshold T is: (0, 20], and the unit of the preset time threshold T is s.

[0021] Furthermore, a cooking cavity is provided inside the cavity. The drawer is connected to the cavity in a manner that it can move back and forth in the cooking cavity. Rollers are respectively arranged on the left and right sides of the drawer. The rollers are in rolling contact with the bottom wall of the cavity and can be in clearance fit or rolling contact with the side wall of the cavity; the included angle between the rotation central axis of the roller and the horizontal plane is α, and α is 0° - 60°.

[0022] Furthermore, on the direction of the rotation central axis of the roller, a first conical surface is arranged on one side of the roller, and a second conical surface is arranged on the other side. The first conical surface is in rolling contact with the side wall, and the second conical surface is in clearance fit or rolling contact with the bottom wall.

[0023] Furthermore, α is 30° - 60°.

[0024] Furthermore, the ratio of the axial width K of the roller to the radial diameter of the roller is b, and b ≥ 1.

[0025] Further, b is 1.5 - 3.5.

[0026] In the second aspect of the present invention, a drawer - type microwave oven is provided, and the drawer - type microwave oven uses any one of the control methods of the above - mentioned drawer - type microwave ovens.

[0027] Compared with the prior art, the drawer - type microwave oven and the control method thereof according to the present invention have the following beneficial effects:

[0028] The present invention provides a drawer - type microwave oven and a control method. Steps S1 to S4 are interrelated and inseparable. The drawer moves at a constant speed throughout the entire opening and closing process, which has multiple functions: First, it avoids the jitter, jerks, or sudden acceleration / deceleration that may occur in traditional non - uniform control, improving the stability of the drawer during the door - opening and closing process, and making the operation more natural and comfortable; Second, the constant - speed movement can prevent the items (such as tableware, food) in the microwave oven from tipping or colliding due to inertia caused by sudden speed changes, improving safety; Third, the constant - speed movement reduces the friction and stress concentration of components such as slide rails and gears, extending the service life of the drawer and the motor; Fourth, the motor has higher efficiency under constant - speed movement, reducing energy waste caused by frequent starts, stops, or speed changes; Fifth, the control method is simple, reducing the development and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of the drawer - type microwave oven according to an embodiment of the present invention;

[0030] Figure 2 It is an exploded view of the drawer - type microwave oven according to an embodiment of the present invention;

[0031] Figure 3 It is a schematic cross - sectional view of the drawer - type microwave oven according to an embodiment of the present invention inside the cavity;

[0032] Figure 4 For the embodiment of the present invention in Figure 3 Local enlarged view at A;

[0033] Figure 5 It is a partial schematic view (structural exploded state) of the roller of the drawer - type microwave oven according to an embodiment of the present invention at the connection of the bottom wall and the side wall of the cavity;

[0034] Figure 6 It is a schematic structural diagram of the drawer according to an embodiment of the present invention;

[0035] Figure 7 It is another schematic structural diagram of the drawer according to an embodiment of the present invention;

[0036] Figure 8 It is an exploded view of the structure of the drawer - type microwave oven according to an embodiment of the present invention;

[0037] Figure 9 Schematic diagram of the structure among the front panel, the outer shell, and the cavity according to the embodiment of the present invention;

[0038] Figure 10 Schematic flow chart of a control method for a drawer - type microwave oven according to the embodiment of the present invention.

[0039] Explanation of reference numerals:

[0040] 1. Outer shell; 11. Left side plate; 12. Right side plate; 13. Bottom plate; 101. First space; 102. Second space; 103. Third space; 2. Cavity; 21. Bottom wall; 22. Side wall; 23. Transition inclined plane; 3. Front panel; 31. First opening; 32. Second opening; 33. Third opening; 4. Drawer; 41. First slide rail assembly; 412. First movable rail; 413. First connecting rail; 42. Second slide rail assembly; 421. Second fixed rail; 422. Second movable rail; 423. Second connecting rail; 43. Third slide rail assembly; 431. Third fixed rail; 432. Third movable rail; 433. Third connecting rail; 44. Door body; 45. Carrier; 451. Assembly plate; 46. Roller; 461. First conical surface; 462. Second conical surface; 463. Peripheral surface of the wheel. Detailed implementation manners

[0041] In order to make the technical means, objectives, and effects of the present invention easy to understand, the embodiments of the present invention will be described in detail below with reference to specific drawings.

[0042] It should be noted that all the terms indicating directions and positions in the present invention, such as: "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "bottom", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection situation among components in a specific state (as shown in the drawings), and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features.

[0043] In the description of the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" 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; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0045] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0046] Embodiment 1

[0047] In the prior art, the drawer 4 of a drawer-type microwave oven may change significantly at different stages during the movement process. The drawer 4 will sway left and right during the movement process, and the stability of the drawer 4 during the movement process is poor; the sudden change in speed causes items (such as tableware and food) in the microwave oven to fall or collide due to inertia, and the safety is relatively low.

[0048] To solve the above technical problems, as Figures 1 to 10 shown, this embodiment proposes a control method for a drawer-type microwave oven. The drawer-type microwave oven includes: a cavity 2, a drawer 4, and a motor. The drawer 4 is connected to the cavity 2, and the motor is used to drive the drawer 4 to move relative to the cavity 2 in the front-rear direction.

[0049] The control method includes:

[0050] Controlling the motor to drive the drawer 4 to move at a constant speed during the entire opening and / or closing process.

[0051] For the control method of the drawer-type microwave oven described in this embodiment, controlling the motor to drive the drawer 4 to move at a constant speed during the entire opening and / or closing process. First, the drawer 4 moves at a constant speed during the entire door opening and closing process, avoiding the inertial impact caused by the change in acceleration, reducing noise and vibration, and improving the movement stability of the drawer 4; second, the constant-speed movement can avoid the items (such as tableware and food) in the microwave oven from falling or colliding due to inertia caused by the sudden change in speed, improving the safety; third, reducing the mechanical wear caused by the inertial impact and prolonging the service life of components such as the drawer 4; fourth, the motor has higher efficiency under constant-speed movement, reducing the energy waste caused by frequent start-stop or speed change; fifth, the control logic is simple, without complex acceleration / deceleration algorithms, and the motor only needs to maintain a constant rotational speed, reducing the complexity and development cost of the control system.

[0052] As a preferred example of this application, the control method includes:

[0053] Control the motor to drive the drawer 4 to move at a constant speed throughout the opening and closing process.

[0054] Specifically, as Figure 10 shown, the control method specifically includes the following steps:

[0055] S1. Power on the drawer-type microwave oven;

[0056] S2. Judge whether to open or close the drawer 4 according to the user's instruction. If it is to open, go to step S3; if it is to close, go to step S4; then go to step S4;

[0057] S3. Control the motor to open the drawer 4, and the drawer 4 moves at a constant speed throughout the opening process;

[0058] S4. Control the motor to close the drawer 4, and the drawer 4 moves at a constant speed throughout the closing process.

[0059] For the control method of a drawer-type microwave oven described in this embodiment, steps S1 to S4 are interrelated and inseparable. The drawer 4 moves at a constant speed throughout the opening and closing process, which has multiple functions: First, it avoids the possible jitter, jerks or sudden acceleration / deceleration in traditional non-uniform control, improves the stability of the drawer 4 during the door opening and closing process, and makes the operation more natural and comfortable; Second, the constant-speed movement can prevent the items (such as tableware and food) in the microwave oven from tipping or colliding due to inertia caused by sudden speed changes, improving safety; Third, the constant-speed movement reduces the friction and stress concentration of components such as slide rails and gears, extending the service life of the drawer 4 and the motor; Fourth, the motor has higher efficiency under constant-speed movement, reducing energy waste caused by frequent start-stop or speed change; Fifth, the control method is simple, reducing development and maintenance costs.

[0060] Specifically, as Figure 10 shown, the control method specifically includes the following steps:

[0061] S5. Judge whether a stop instruction is received. If so, go to step S8; if not, go to step S6;

[0062] S6. Obtain the action time t of the motor;

[0063] S7. Judge whether the action time t of the motor > the preset time threshold T. If so, go to step S8; if not, maintain the original state;

[0064] S8. Control the motor to stop moving.

[0065] Steps S5 to S8 are interrelated and inseparable. Through the dual mechanisms of real-time instruction detection + timeout threshold protection, it performs excellently in terms of safety, stability, energy conservation, and cost-effectiveness. Step S5 responds to the stop instruction in real time. When the user triggers an emergency stop, the system can immediately respond and stop the motor, avoiding the expansion of accidents and improving safety; Step S7 has an action time threshold T limit. If the motor continues to run for more than the preset time T due to a fault (such as a program infinite loop or mechanical jamming), the system automatically stops, preventing overheating or damage, which not only reduces ineffective energy consumption but also further improves safety.

[0066] Specifically, the preset time threshold T is a preset value and is not specifically limited.

[0067] As a preferred example of the present application, the value range of the preset time threshold T is: (0, 20]. The preset time threshold T can take any value in (0, 20]. The unit of the preset time threshold T is s. The preset time threshold T can be 0.5 s, the preset time threshold T can also be 2 s, the preset time threshold T can also be 10 s, and the preset time threshold T can also be 20 s, and is not limited thereto.

[0068] As a preferred example of the present application, in this embodiment, the preset time threshold T is 5 s.

[0069] Embodiment 2

[0070] In order to further solve the problem that the drawer 4 will shake left and right during movement and the stability of the drawer 4 during movement is poor, this embodiment proposes a drawer-type microwave oven that uses a control method for a drawer-type microwave oven according to any one of Embodiment 1.

[0071] This embodiment proposes a drawer-type microwave oven, as shown in the appendix Figures 1 - 9 As shown, the drawer-type microwave oven includes a cavity 2 and a drawer 4. The cavity 2 has a cooking cavity inside. The drawer 4 is connected to the cavity 2 in a manner that can move back and forth in the cooking cavity. Roller wheels 46 are respectively arranged on the left and right sides of the drawer 4. The roller wheels 46 are in rolling contact with the bottom wall 21 of the cavity 2 and can be in clearance fit or rolling contact with the side wall 22 of the cavity 2; the included angle α between the rotation center axis (i.e., the rolling axis) of the roller wheels 46 and the horizontal plane is 0° - 60°.

[0072] It should be noted that in order to avoid ambiguity, the cavity 2 often has two left and right side walls 22. Correspondingly, roller wheels 46 are arranged on the left and right sides of the drawer 4. In this application, the roller wheels 46 can contact the side wall 22, which means that the roller wheels 46 can contact the adjacent side wall 22, such as the left roller wheel contacting the left side wall.

[0073] Therefore, based on the existing drawer-type microwave oven, this application only sets two rollers 46, and there is no need to make any changes to the structure of the existing cavity 2. Only by adjusting the setting of the rollers 46, the rollers 46 can not only rollingly contact the bottom wall 21, but also be in clearance fit or rolling contact with the side wall 22. On the one hand, it ensures the normal pulling and pushing process of the drawer 4. On the other hand, the cavity 2 itself can provide a limiting effect on the rollers 46 and the drawer 4 in the left and right directions. Compared with the prior art, the rollers 46 with a vertically arranged rolling axis are omitted, the number of rollers 46 is reduced, and the limiting of the drawer 4 in the left and right directions can also be achieved, avoiding the left and right shaking of the drawer 4 during the pulling and pushing process.

[0074] Correspondingly, on the basis of being able to solve the problem of the left and right shaking of the drawer 4, this application can effectively reduce the number of rollers 46 set compared with the prior art, reduce the structural complexity of the moving parts on the drawer 4, and is beneficial to reducing the assembly difficulty of the drawer 4 in the cooking cavity.

[0075] The drawer 4 includes a door body 44, a carrier 45, and a slide rail assembly. The front part of the carrier 45 is connected to the door body 44. Rollers 46 are respectively arranged on both sides of the rear part of the carrier 45. The drawer 4 is slidably connected to the cavity 2 through the slide rail assembly, thereby further improving the smoothness of the drawer 4 during the pulling and pushing process.

[0076] An assembly plate 451 is arranged at the rear part of the carrier 45. The roller 46 is connected to the assembly plate 451 in a rotatable manner. The assembly plate 451 can be integrally stamped and formed along with the processing of the carrier 45 without additional setting and assembly, which is beneficial to simplifying the overall structure of the carrier 45 and the drawer 4.

[0077] The ratio of the axial width K of the roller 46 to the radial diameter of the roller 46 is b, and b≥1.

[0078] The roller 46 is set wider. On the one hand, it increases the contact area between the roller 46 and the bottom wall 21, improves the movement stability of the roller 46 and the drawer 4. On the other hand, it enables the roller 46 to be close to the side wall 22, and even has a certain degree of contact with the side wall 22, ensuring the limiting effect of the cavity 2 on the roller 46 and the drawer 4 in the left and right directions, avoiding the left and right shaking of the drawer 4 during the pulling and pushing process, and improving the safety and system stability of the drawer 4 during the entire opening and closing process.

[0079] Regarding the specific setting of the roller 46, this application proposes the following several forms.

[0080] Form 1

[0081] As shown in the appendix Figure 4As shown, on the direction of the rotation center axis of the roller 46, a first conical surface 461 is provided on one side of the roller 46, and a second conical surface 462 is provided on the other side. The first conical surface 461 is in rolling contact with the side wall 22, and the second conical surface 462 is in clearance fit or rolling contact with the bottom wall 21. The sum of the cone angles of the first conical surface 461 and the second conical surface 462 is 180°, or rather, the sum of the oblique angles (half-cone angles) of the first conical surface 461 and the second conical surface 462 is 90°.

[0082] Wherein, in order to avoid unnecessary spatial interference, both the first conical surface 461 and the second conical surface 462 are flat-top conical types. Of course, if the space is properly arranged, they can also be conventional conical types.

[0083] Preferably, in the case of Form 1, the angle α between the rotation center axis (i.e., the rolling axis) of the roller 46 and the horizontal plane is 30° - 60°, and preferably α is 45°, to avoid the roller 46 from being too inclined, so as to ensure the smoothness of the roller 46 during operation, and at the same time avoid generating excessive component forces on the roller itself and the corresponding roller assembly structure (carrier 45, assembly plate 451).

[0084] On this basis, as shown in the appendix Figure 5 This application makes structural improvements to the connection between the bottom wall 21 and the side wall 22.

[0085] A transition inclined surface 23 is provided between the bottom wall 21 and the side wall 22. The circumferential surface 463 of the roller 46 is in rolling contact with the transition inclined surface 23. Correspondingly, the transition inclined surface 23 is parallel to the rotation center axis of the roller 46. Thus, on the basis of the cooperation between the two conical surfaces on both sides of the roller 46 and the bottom wall 21 and the side wall 22, by further providing the transition inclined surface 23 to support the circumferential surface 463 of the roller 46, on the one hand, it avoids some structures of the roller 46 from being in an overhanging state, which is beneficial to improving the force distribution of the roller 46, and on the other hand, it increases the contact area between the roller 46 and the cavity 2, which is beneficial to ensuring the smooth rolling of the roller 46 and improving the movement smoothness of the drawer 4 during the pulling and retracting processes.

[0086] Form 2

[0087] As shown in the appendix Figure 7As shown, the included angle α between the rotation center axis (i.e., the rolling axis) of the roller 46 and the horizontal plane is 0°, and the ratio b of the axial width K of the roller 46 to its radial diameter is such that b≥1; the circumferential surface 463 of the roller 46 is in rolling contact with the bottom wall 21, and the side surface of the roller 46 adjacent to the side wall 22 is in clearance fit or rolling contact with the side wall 22. Correspondingly, the roller 46 can be widened on the basis of a conventional roller. For example, the ratio b of K to the radial diameter of the roller 46 is 1.5 - 3.5 for reference, and it is recommended to be based on the actual space dimensions.

[0088] That is, in Form 2, the rolling axis of the roller 46 is set horizontally and the roller 46 is made wider. On the one hand, it increases the contact area between the roller 46 and the bottom wall 21, improving the movement smoothness of the roller 46 and the drawer 4. On the other hand, it enables the roller 46 to be close to the side wall 22 and even have a certain degree of contact with the side wall 22, ensuring the limiting effect of the cavity 2 on the roller 46 and the drawer 4 in the left - right direction and preventing the drawer 4 from shaking left and right during the pulling - out process.

[0089] In Form 2, since the side surface of the roller 46 may come into contact with the side wall 22, causing excessive friction, preferably, balls (not shown) are provided on the side surface of the roller 46 adjacent to the side wall 22. The balls are connected to the roller 46 and can rotate relative to the roller 46 and the side wall 22, so that even if contact occurs between the roller 46 and the side wall 22, only rolling friction (similar to the effect of the bearing balls) will be generated, rather than sliding friction between surfaces, which is beneficial to reducing resistance and ensuring the smoothness of the drawer 4 during the pulling - out process.

[0090] For the assembly of the drawer 4, the slide rail assembly, and the cavity 2, the slide rail assembly includes a fixed rail and a movable rail. Both the fixed rail and the movable rail are arranged in the front - rear direction. The fixed rail is connected to the cavity 2, and the movable rail is connected to the door body 44 and / or the carrier 45. The movable rail is connected to the fixed rail and can slide along the fixed rail.

[0091] The fixed rail has a chute structure, and the movable rail can slide in the chute. The slide rail assembly includes a connecting rail, which is arranged between the fixed rail and the movable rail. Among them, the width of the connecting rail does not exceed the width of the chute of the fixed rail, so that the connecting rail is located in the chute, and the movable rail is wrapped outside the connecting rail, and the connecting rail drives the movable rail to slide.

[0092] In order to further improve the connection stability of the fixed rail, the drawer-type microwave oven includes a front panel 3, which is connected to the front side of the cavity 2. While the main body of the fixed rail is connected to the cavity 2, one end of the fixed rail is connected to the front panel 3 and the other end is connected to the rear panel of the cavity 2, so that the entire fixed rail can be more stably fixed in the cooking device, providing a stable support for the movable rail and preventing unnecessary offset or loosening of the movable rail during the sliding process.

[0093] In order to improve the smoothness of the drawer 4 during the pulling process, three slide rail assemblies are provided in this application, which are respectively denoted as the first slide rail assembly 41, the second slide rail assembly 42, and the third slide rail assembly 43. Specifically, the drawer-type microwave oven includes a front panel 3 and a housing 1. The front panel 3 is connected to the front sides of the housing 1 and the cavity 2. The first slide rail assembly 41 is provided on the left side of the drawer 4, the second slide rail assembly 42 is provided on the right side of the drawer 4, and the third slide rail assembly 43 is provided at the bottom of the drawer 4. Any one of the slide rail assemblies can extend or retract relative to the front panel 3. Thus, through the arrangement of the three connection surfaces and three slide rails of the drawer 4, the pulling direction of the drawer 4 is limited to ensure the smooth progress of the pulling action of the drawer 4 and prevent unnecessary jamming of the drawer 4 during the pulling process.

[0094] A first space 101, a second space 102, and a third space 103 are provided between the housing 1 and the cavity 2. The first space 101 and the second space 102 are respectively located on the left and right sides of the cavity 2, and the third space 103 is located at the bottom of the cavity 2. Specifically, a first space 101 is formed between the left side wall of the cavity 2 and the left side plate 11 of the housing 1, a second space 102 is formed between the right side wall of the cavity 2 and the right side plate 12 of the housing 1, and a third space 103 is formed between the bottom wall 21 of the cavity 2 and the bottom plate 13 of the housing 1.

[0095] The first slide rail assembly 41 is arranged inside the first space 101, the second slide rail assembly 42 is arranged inside the second space 102, the third slide rail assembly 43 is arranged inside the third space 103, and the front panel 3 covers the front sides of the first space 101, the second space 102, and the third space 103.

[0096] A first opening 31, a second opening 32, and a third opening 33 are respectively provided on the front panel 3. The first slide rail assembly 41 passes through the first opening 31, the second slide rail assembly 42 passes through the second opening 32, and the third slide rail assembly 43 passes through the third opening 33.

[0097] The first slide rail assembly 41 includes a first fixed rail (not shown), a first movable rail 412, and a first connecting rail 413. The first fixed rail is connected to the cavity 2. The first movable rail 412 is slidably connected to the first fixed rail. The first connecting rail 413 is fixedly connected to the first movable rail 412, preferably by fasteners. Correspondingly, the first opening 31 is provided with an avoidance notch for spatially avoiding the fasteners of the first connecting rail 413 and the first movable rail 412.

[0098] The second slide rail assembly 42 includes a second fixed rail 421, a second movable rail 422, and a second connecting rail 423. The second fixed rail 421 is connected to the cavity 2. The second movable rail 422 is slidably connected to the second fixed rail 421. The second connecting rail 423 is fixedly connected to the second movable rail 422, preferably by fasteners. Correspondingly, the second opening 32 is provided with an avoidance notch for spatially avoiding the fasteners of the second connecting rail 423 and the second movable rail 422.

[0099] The third slide rail assembly 43 includes a third fixed rail 431, a third movable rail 432, and a third connecting rail 433. The third fixed rail 431 is connected to the cavity 2. The third movable rail 432 is slidably connected to the third fixed rail 431. The third connecting rail 433 is fixedly connected to the third movable rail 432, preferably by fasteners. Correspondingly, the third opening 33 is provided with an avoidance notch for spatially avoiding the fasteners of the third connecting rail 433 and the third movable rail 432.

[0100] For the drawer-type microwave oven, in addition to the above structures, it also includes other related components. Since the specific structures and specific assembly relationships of its related components are all prior arts, they will not be elaborated here.

[0101] In this embodiment, step S3 includes the following steps:

[0102] S31. Obtain the included angle α between the rotation center axis of the roller 46 and the horizontal plane;

[0103] S32. Determine whether α is 0; if so, go to step S34; if not, go to step S33;

[0104] S33. The speed v of the drawer 4 during the entire opening process = the preset initial speed v 0 - the first preset coefficient k 1 *α;

[0105] S34. Obtain the ratio b of the axial width K of the roller 46 to the radial diameter of the roller 46;

[0106] S35. Determine whether b≥1; if so, go to step S36; if not, go to step S37;

[0107] S36. The speed v of the drawer 4 during the entire opening process is the preset initial speed v 0 + the second preset coefficient k 2 *b;

[0108] S37. The speed v of the drawer 4 during the entire opening process is the preset initial speed v 0 .

[0109] S31 - S33 dynamically adjust the opening speed of the drawer 4 based on the angle α between the rotation center axis of the roller 46 and the horizontal plane. When α is not 0 and the roller 46 is inclined, the speed during the opening process decreases, avoiding the drawer 4 moving too fast and getting out of control due to the inclination, and improving the safety and stability of the drawer 4 during the entire opening process; S34 - S37 dynamically adjust the opening speed of the drawer 4 based on the ratio b of the axial width K of the roller 46 to the radial diameter of the roller 46. When b ≥ 1, the speed during the opening process increases, improving the opening efficiency of the drawer 4 on the basis of ensuring the safety and stability of the drawer 4 during the entire opening process.

[0110] Steps S31 - S37 are interrelated and inseparable. Through the dynamic speed adjustment mechanism, combining the angle α between the rotation center axis of the roller 46 and the horizontal plane and the ratio b of the axial width K of the roller 46 to the radial diameter of the roller 46, the intelligent control of the opening speed of the drawer 4 is realized, not only improving the safety and system stability of the drawer 4 during the entire opening process, but also increasing the opening efficiency of the drawer 4.

[0111] Step S4 includes the following steps:

[0112] S41. Obtain the angle α between the rotation center axis of the roller 46 and the horizontal plane;

[0113] S42. Determine whether α is 0; if so, go to step S44, if not, go to step S43;

[0114] S43. The speed v of the drawer 4 during the entire closing process is the preset initial speed v 0 - the first preset coefficient k 1 *α;

[0115] S44. Obtain the ratio b of the axial width K of the roller 46 to the radial diameter of the roller 46;

[0116] S45. Determine whether b ≥ 1; if so, go to step S46, if not, go to step S47;

[0117] S46. The speed v of the drawer 4 during the entire closing process is the preset initial speed v 0 + the second preset coefficient k 2 *b;

[0118] S47. The speed v of the drawer 4 during the entire closing process is the preset initial speed v 0 .

[0119] S41 - S43 dynamically adjust the closing speed of the drawer 4 based on the angle α between the rotation center axis of the roller 46 and the horizontal plane. When α is not 0 and the roller 46 is inclined, the speed during the closing process decreases, avoiding the drawer 4 moving too fast and getting out of control due to the inclination, and improving the safety and stability of the drawer 4 during the entire closing process; S45 - S47 dynamically adjust the closing speed of the drawer 4 based on the ratio b of the axial width K of the roller 46 to the radial diameter of the roller 46. When b ≥ 1, the speed during the closing process increases, improving the closing efficiency of the drawer 4 on the basis of ensuring the safety and stability of the drawer 4 during the entire closing process.

[0120] Steps S41 - S47 are interrelated and inseparable. Through the dynamic speed adjustment mechanism, combining the angle α between the rotation center axis of the roller 46 and the horizontal plane and the ratio b of the axial width K of the roller 46 to the radial diameter of the roller 46, the intelligent control of the closing speed of the drawer 4 is realized, not only improving the safety and system stability of the drawer 4 during the entire closing process, but also improving the closing efficiency of the drawer 4.

[0121] Specifically, the preset initial speed v 0 , the first preset coefficient k 1 and the second preset coefficient k 2 are all preset values and are not specifically limited.

[0122] In summary, this application starts from two aspects: the control method of the drawer - type microwave oven and the structure of the drawer - type microwave oven to improve the stability and safety of the drawer during the opening and closing processes. The control method of the drawer - type microwave oven described in this embodiment and the structure of the drawer - type microwave oven are interrelated and inseparable, not only improving the safety and system stability of the drawer 4 during the entire opening and closing processes, but also improving the opening and closing efficiency of the drawer 4, prolonging the service life of the drawer 4 and the motor, and reducing the energy waste caused by frequent start - stop or speed change.

[0123] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. A control method for a drawer-type microwave oven, characterized in that: The drawer-type microwave oven comprises: a cavity (2), a drawer (4) and a motor, wherein the drawer (4) is connected to the cavity (2), and the motor is used to drive the drawer (4) to move in a front-rear direction relative to the cavity (2). The control method comprises: The motor is controlled to drive the drawer (4) to move at a constant speed during the entire opening and / or closing process.

2. The control method of a drawer-type microwave oven according to claim 1, characterized in that: The control method specifically comprises the following steps: S1, the drawer type microwave oven is powered on; S2, judging whether to open or close the drawer (4) according to the user's instruction, if it is opened, proceeding to step S3, if it is closed, proceeding to step S4; S3, controlling the motor to open the drawer (4), wherein the drawer (4) moves at a constant speed during the entire opening process; S4, controlling the motor to close the drawer (4), wherein the drawer (4) moves at a constant speed during the entire closing process.

3. The control method of a drawer-type microwave oven according to claim 2, characterized in that: The control method specifically comprises the following steps: S5, determine whether a stop instruction is received, if yes, proceed to step S8, if no, proceed to step S6; S6, obtaining the action time t of the motor; S7, determine whether the motor action time t> preset time threshold T, if so, proceed to step S8, if not, maintain the original state; S8, control the motor to stop moving.

4. The control method of a drawer-type microwave oven according to claim 3, characterized in that: The value range of the preset time threshold T is: (0, 10], and the unit of the preset time threshold T is s.

5. The control method of a drawer-type microwave oven according to claim 4, characterized in that: The cavity (2) has a cooking cavity inside, the drawer (4) is connected to the cavity (2) in a manner that it can move forward and backward in the cooking cavity, and rollers (46) are respectively arranged on the left and right sides of the drawer (4), the rollers (46) are in rolling contact with the bottom wall (21) of the cavity (2), and can be in clearance fit or rolling contact with the side walls (22) of the cavity (2); the angle between the rotation center axis of the roller (46) and the horizontal plane is α, and α is 0°-60°.

6. The control method of a drawer-type microwave oven according to claim 5, characterized in that: In the direction of the rotation center axis of the roller (46), a first conical surface (461) is provided on one side of the roller (46), and a second conical surface (462) is provided on the other side; the first conical surface (461) is in rolling contact with the side wall (22), and the second conical surface (462) is in clearance fit or rolling contact with the bottom wall (21).

7. The control method of a drawer-type microwave oven according to claim 6, characterized in that: α is 30°-60°.

8. The control method of a drawer-type microwave oven according to claim 5, characterized in that: The ratio of the axial width K of the roller (46) to the radial diameter of the roller (46) is b, and b≥1.

9. The control method of a drawer-type microwave oven according to claim 8, characterized in that: b is 1.5-3.

5.

10. A drawer-type microwave oven, characterized in that: The drawer-type microwave oven uses a control method for a drawer-type microwave oven as described in any one of claims 1 to 9.

Images