A cake baking uniform heating device with adaptive temperature adjustment and rotation and a working method thereof

Abstract

The application provides a cake baking uniform heating equipment and method with adaptive temperature adjustment and rotation, wherein the heating equipment comprises a box body, a placing disc, a baffle, a hot air device, a driving motor and a transmission mechanism. The driving motor drives the worm of the transmission mechanism to rotate through bevel gears, the worm drives the transmission shaft and the placing disc to rotate circumferentially on one hand, and drives the placing disc to rise and fall through the worm gear, the first rotating shaft, the eccentric bearing and the connecting rod assembly on the other hand. In the initial stage, the adjusting cylinder is not in action, the push rod is in the initial limiting position, and the placing disc only rises and falls slightly in the third vent hole group area at the top of the box body to complete the cake surface shaping. The subsequent adjusting cylinder drives the push rod to move to change the limiting position, and then adjusts the lifting stroke of the transmission sleeve and the placing disc, so that the placing disc can drive the cake to expand to the second vent hole group and the first vent hole group area in turn in the process of continuous circumferential rotation, fully adapts to the hot air action demand of each temperature zone, and effectively guarantees the baking uniformity.

Description

Technical Field

[0001] This invention relates to the field of cake baking equipment, and in particular to an adaptive temperature control and rotation cake baking equipment for uniform heating and its working method. Background Technology

[0002] In the field of cake baking equipment, various baking devices equipped with hot air circulation systems have emerged in the existing technology to achieve uniform heating of cakes. These devices typically use electric heating to create a high temperature inside the cavity where the cake is placed, and achieve heating and baking through heat exchange between the high temperature and the cake surface. Some devices also have ventilation structures to assist in the circulation of hot air and improve heat exchange efficiency.

[0003] Existing baking devices generally suffer from unreasonable temperature zone distribution and an inability to accurately adapt to the temperature requirements of cake baking. These devices often struggle to create a gradient temperature zone within the oven that aligns with the cake baking process, failing to effectively balance the temperature difference between the cake's surface and bottom. This can lead to over-baking of the surface or under-baking of the bottom during the baking process, negatively impacting the final quality of the cake. Summary of the Invention

[0004] To address the shortcomings mentioned in the background technology, the present invention provides an adaptive temperature control and rotation cake baking uniform heating device and its working method.

[0005] The present invention adopts the following technical solution: In a first aspect, the present invention discloses an adaptive temperature control and rotation cake baking uniform heating device and method, the heating device comprising: The housing, with a fixed support base at the bottom inside the housing; A placement tray is provided, with a drive shaft fixed below it. The drive shaft passes through the support base and is restricted to axial lifting and circumferential rotation relative to the support base. The box contains baffles on both sides of the support base, forming an air duct between the two baffles and the inner wall of the box. An air inlet is provided below one of the baffles, and a return air duct is connected below the other baffle. A hot air device is disposed in the support base, and the air outlet of the hot air device corresponds to the air inlet, and the end of the return air pipe away from the baffle corresponds to the hot air device. Both of the baffles have multiple sets of ventilation holes on their surfaces above the support base. The multiple sets of ventilation holes are arranged from bottom to top as a first ventilation hole group, a second ventilation hole group, and a third ventilation hole group. The diameter of each ventilation hole in the first ventilation hole group is smaller than the diameter of each ventilation hole in the second ventilation hole group, and the diameter of each ventilation hole in the second ventilation hole group is smaller than the diameter of each ventilation hole in the third ventilation hole group. The placement plate moves up and down relative to the first ventilation hole group, the second ventilation hole group, and the third ventilation hole group.

[0006] In one possible implementation of the first aspect, the hot air device includes an electric heating component and a fan, the electric heating component converting electrical energy into heat energy to heat the air, the electric heating component being located between the air inlet and the fan, and the air outlet of the fan facing the electric heating component.

[0007] In one possible implementation of the first aspect, the heating device further includes a transmission mechanism, the transmission mechanism comprising: A worm gear is vertically connected to the support base, and the axial direction of the worm gear is limited to be fixed relative to the support base. A spline shaft is fixed at the upper end of the worm gear. A spline hole is formed inside the hollow transmission shaft, and the upper end of the spline shaft passes through the spline hole of the transmission shaft. A transmission sleeve is connected to the lower end of the transmission shaft and is axially fixed relative to the transmission shaft. A worm gear, the center of which is fixed to a first rotating shaft, the first rotating shaft is restricted to rotate within the support seat, so that the worm gear and the worm mesh, and an eccentric bearing is fitted at the end of the first rotating shaft, the first rotating shaft passing through the inner ring of the eccentric bearing; A swing arm, one end of which is fixedly sleeved on the outer ring of the eccentric bearing; A linkage assembly, comprising a first linkage and a second linkage, wherein one end of the first linkage is pivotally connected to the transmission sleeve, the other end of the first linkage is pivotally connected to the second linkage, and the second linkage is also pivotally connected to the end of the rocker arm away from the eccentric bearing; When the worm rotates and drives the transmission shaft through the splined shaft, thereby driving the placement disk to rotate, the worm meshes with the worm wheel and rotates synchronously. The first rotating shaft then drives the eccentric bearing to rotate. The eccentric bearing is linked to the swing arm to swing. The swing arm drives the transmission sleeve to move axially along the splined shaft, thereby driving the placement disk to rise and fall.

[0008] In one possible implementation of the first aspect, the transmission sleeve has an embedded bearing, the transmission shaft passes through the inner bearing ring of the transmission sleeve, and the transmission sleeve is fixed relative to the inner bearing ring of the transmission sleeve.

[0009] In one possible implementation of the first aspect, the support base includes a top plate, a bottom plate, and a vertical plate, the vertical plate is fixed between the top plate and the bottom plate, the hot air device is located between the top plate and the bottom plate, the worm gear and the worm are both connected to the vertical plate, the bottom plate is fixed to the housing, and the drive shaft passes through the top plate so that the placement tray is located above the top plate.

[0010] In one possible implementation of the first aspect, the heated device further includes a push rod, the middle of the second connecting rod is pivotally connected to the swing rod, the connecting rod assembly further includes a third connecting rod and a tension spring, one end of the third connecting rod is pivotally connected to the support seat, and the other end of the third connecting rod is pivotally connected to the end of the second connecting rod away from the first connecting rod; the push rod is connected to the support seat, and the push rod moves relative to the pivotal portion of the third connecting rod and the second connecting rod; the second connecting rod is fixed with a limiting rod, the limiting rod is located on the side of the second connecting rod opposite to the push rod, the two ends of the tension spring are respectively connected to the second connecting rod and the third connecting rod, and the elastic force of the tension spring pulls the limiting rod against the surface of the third connecting rod.

[0011] In one possible implementation of the first aspect, the heated device further includes an adjusting cylinder fixed within the support base, and the piston rod end of the adjusting cylinder is fixed to the push rod.

[0012] In one possible implementation of the first aspect, the support base includes a top plate, a bottom plate, vertical plates, and crossbars. Two vertical plates are fixed between the top plate and the bottom plate. The crossbars are fixed on both sides between the two vertical plates. An mounting plate is fixed between the two crossbars. A third connecting rod is located between the two vertical plates. An adjusting cylinder is fixed to the mounting plate, and the piston rod of the adjusting cylinder passes through the mounting plate and connects to the push rod.

[0013] Secondly, the present invention also discloses a method for operating the above-mentioned heating device, the method comprising the following steps: Initial motion execution: The hot air device is activated, and while the placement tray rotates axially, it only rises and falls slightly within the area of ​​the third ventilation hole group to complete the initial shaping of the cake surface; Temperature zone expansion switching: Change the descent stroke of the placement tray so that the cake can be extended to the second ventilation hole group or the first ventilation hole group area in sequence according to process requirements during circumferential rotation, so as to achieve the effect of circulating through the gradient hot air flow field formed by three groups of ventilation holes with different diameters. Baking complete and system reset: The placement tray and the hot air device stop working, the placement tray stops moving and resets to the initial position, completing the entire automated baking operation process.

[0014] As described above, this invention has the following advantages compared to existing technologies: The invention utilizes a differentiated design with multiple sets of ventilation holes of increasing diameter from bottom to top. This directly affects the hot air delivery throughput per unit time. Larger hole diameters correspond to a more abundant supply of hot air in the corresponding area, naturally creating a hot air gradient distribution along the height of the processing chamber. This results in a layered temperature zone with progressively increasing temperature from bottom to top. This temperature zone distribution conforms to the physical characteristic of naturally rising hot air, maintaining a stable temperature gradient without additional power intervention. It can match the temperature requirements of different baking stages of the cake. For example, the high-temperature zone at the top allows for rapid surface setting of the cake, while the relatively low-temperature zone in the middle and lower parts balances the conductive heat generated at the bottom of the cake due to contact with the placement tray, preventing over-baking and carbonization of the bottom. As the cake flexibly rises and falls with the placement tray in different temperature zones, it can fully receive the hot air from each zone, ensuring that the heating state of each part of the cake better matches the baking process requirements. This effectively balances the temperature difference between the surface and bottom of the cake, ultimately ensuring uniform heating of all parts of the cake. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the device of the present invention.

[0016] Figure 2 This is a cross-sectional structural diagram of the device of the present invention.

[0017] Figure 3 A three-dimensional structural diagram showing baffles installed on both sides of the support base.

[0018] Figure 4 for Figure 3 A diagram showing the hidden side panels.

[0019] Figure 5 for Figure 4 A cross-sectional view along the AA direction.

[0020] Figure 6 for Figure 5 A magnified diagram of point B in the middle.

[0021] Figure 7 for Figure 5 A magnified diagram of point C.

[0022] Figure 8 for Figure 4 A diagram showing the view from the opposite side.

[0023] Figure 9 This is a schematic diagram showing the placement of the disc and the drive shaft from a low angle.

[0024] Figure 10 A three-dimensional structural diagram showing the connection between the transmission mechanism, the placement disc, and the drive motor.

[0025] Figure 11 for Figure 10 A magnified diagram of point D in the middle.

[0026] Figure 12 A three-dimensional structural diagram showing a push rod installed inside the support base.

[0027] Figure 13 This is a three-dimensional structural diagram of the transmission mechanism.

[0028] Figure 14 for Figure 13 A magnified diagram at point E in the middle.

[0029] Figure 15 This is a three-dimensional structural diagram of the second link.

[0030] Figure 16 for Figure 5 A schematic diagram showing the second and third links after they have swung to a relative bend.

[0031] Figure 17 for Figure 16 A magnified diagram at point F in the middle. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will now be described in further detail with reference to the accompanying drawings.

[0033] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this embodiment, unless otherwise stated, "a plurality of" means two or more.

[0034] Furthermore, in this embodiment, directional terms such as "upper" and "lower" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used to describe and clarify relative positions, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0035] This invention provides an adaptive temperature control and rotation cake baking uniform heating device, as shown in the attached figure. Figures 1 to 3As shown, the heating device includes a housing 1, a placement tray 2, a baffle 3, a hot air device 4, a drive motor 5, and a transmission mechanism 6. A support base 11 is fixed at the bottom inside the housing 1, forming a processing chamber 101 above the support base 11. A door 12 is provided on the front of the housing 1 for opening and closing the processing chamber 101. The hot air device 4, located inside the support base 11, provides hot air to the processing chamber 101 to ensure the required temperature conditions for cake baking. The placement tray 2 is used to place the cake to be baked. A drive shaft 21 is fixed below the placement tray 2, passing through the support base 11. The drive shaft 21 is restricted to axial lifting and circumferential rotation relative to the support base 11, allowing the placement tray 2 to be positioned in the processing chamber 101 and to drive the cake to achieve a combined lifting and rotational movement. This ensures that all parts of the cake receive hot air evenly during baking, thereby improving baking uniformity.

[0036] Continue to refer to the appendix Figures 1 to 3 Inside the housing 1, baffles 3 are installed on both sides of the support base 11. The two baffles 3 and the inner wall of the housing 1 enclose an air duct 102. Multiple sets of ventilation holes are provided on the surface of the two baffles 3 above the support base 11. An air inlet 304 is located below one baffle 3, and a return air duct 13 is connected below the other baffle 3. The end of the return air duct 13 furthest from the baffle 3 corresponds to a hot air device 4. The two baffles 3 and the inner wall of the housing 1 enclose independent air inlet and return air ducts. The air duct 102 corresponding to one baffle 3 is the air inlet channel (see attached diagram). Figure 2 The left-side air duct 102), and the other-side air duct 102 is the return air duct (corresponding to the attached... Figure 2 The right-side air duct 102 prevents short-circuiting of hot air during circulation, ensuring that the hot air flowing out of the processing chamber flows smoothly back to the fan along a preset path, thus ensuring the stability and uniformity of the hot air flow field.

[0037] Please refer to the appendix. Figure 4 and 5The hot air device 4 includes an electric heating element 41 and a fan 42. The electric heating element 41 converts electrical energy into heat energy to heat the air. Specifically, the electric heating element can be composed of multiple electric heating tubes 412 arranged together, and the electric heating tubes 412 are fixed inside a frame 411. The support base 11 includes a top plate 111, a bottom plate 112, and a vertical plate 113. The vertical plate 113 is fixed between the top plate 111 and the bottom plate 112. The bottom plate 112 is fixed to the lower part inside the housing 1. The frame 411 and the fan 42 are both located between the top plate 111 and the bottom plate 112. The electric heating element 41 is located between the air inlet 304 and the fan 42. The air outlet of the fan 42 faces the electric heating element 41, forming an assembly state in which the air outlet of the hot air device 4 corresponds to the air inlet 304. During operation, the blower 42 delivers air heated by the electric heating component 41 through the baffle 3 with the air inlet 304 into the air duct 102 enclosed by the baffle 3. The heated air is then delivered to the processing chamber 101 through the ventilation holes on the baffle 3. Subsequently, the heated air enters the other side of the air duct 102 enclosed by the baffle 3 and the inner wall of the box 1 through the ventilation holes on another baffle 3. Finally, it is delivered back to the back of the blower 42 through the return air pipe 13, thereby realizing the closed-loop circulation of hot air in the box 1, ensuring the uniformity of temperature distribution in the processing chamber 101, and improving the quality of cake baking.

[0038] Continue to refer to the appendix Figure 3 The multiple ventilation holes of the baffle 3 are arranged from bottom to top as the first ventilation hole group, the second ventilation hole group, and the third ventilation hole group. The diameter of each ventilation hole in the first ventilation hole group is smaller than that in the second ventilation hole group, and the diameter of each ventilation hole in the second ventilation hole group is smaller than that in the third ventilation hole group. The size of the ventilation hole diameter directly determines the hot air delivery flow rate per unit time. The larger the diameter, the more hot air is delivered in the same amount of time, and the higher the air temperature in the corresponding area. Based on this principle, the ventilation hole groups with gradually increasing diameters from bottom to top can naturally form a layered temperature zone with the temperature gradually increasing from bottom to top. Without additional power intervention, the hot air volume gradient distribution in the processing chamber 101 can be maintained in a stable temperature zone, thereby constructing a layered temperature zone with the temperature gradually increasing from bottom to top. During the cake baking process, the bottom will directly contact the placement tray 2 to generate heat conduction. Setting the first and second ventilation hole groups with smaller diameters at the bottom as relatively low-temperature zones can balance the heat conduction effect at the bottom and avoid the problem of over-baking and carbonization at the bottom of the cake. The third ventilation hole group with the largest diameter at the top is set as a high-temperature zone, which can specifically bake the surface of the cake, promote the rapid setting of the cake surface, and improve the overall taste and appearance of the cake.

[0039] Preferably, the first ventilation hole group has a diameter of 2-3 mm, corresponding to a temperature zone of 60-80℃; the second ventilation hole group has a diameter of 4-5 mm, corresponding to a temperature zone of 80-100℃; and the third ventilation hole group has a diameter of 6-8 mm, corresponding to a temperature zone of 100-120℃. Simultaneously, the electric heating element is equipped with a power adjustment module, which can adjust the heating power in real time through the control system. Combined with the gradient airflow design of the ventilation hole groups, this achieves precise temperature control in each temperature zone, meeting the baking process requirements of different types and sizes of cakes.

[0040] The placement tray 2, driven by the transmission mechanism 6, rises and falls relative to the first, second, and third ventilation hole groups, thereby causing the cake to switch between different temperature zones during baking. (See attached image) Figure 5 , 6 As shown in Figures 8 and 10, the transmission mechanism 6 includes a worm 61, a worm wheel 62, a transmission sleeve 63, a rocker arm 64, a connecting rod assembly 65, and a push rod 66. The worm 61 is vertically connected to the support base 11, and its axial direction is limited to be fixed relative to the support base 11. Specifically, the vertical plate 113 of the support base 11 fixes two first bearing seats 612 from top to bottom, and the two ends of the worm 61 are respectively embedded in the two first bearing seats 612, so that the worm 61 retains only the rotational degree of freedom around its own axis. The transmission shaft 21 of the placement disk 2 passes downward through the top plate 111, so that the placement disk 2 is located in the processing chamber 101 area above the top plate 111. The upper end of the worm 61 is fixed to a splined shaft 611. Preferably, the worm 61 and the splined shaft 611 can be integrally formed from the same shaft blank through machining. This integrally formed structure can improve the overall structural strength of the component, reduce the cumulative error generated in the assembly process, and ensure transmission accuracy. The drive shaft 21 is hollow inside to form a spline hole. The upper end of the spline shaft 611 passes into the spline hole of the drive shaft 21. This spline mating structure can not only realize the torque transmission when the worm 61 rotates, driving the drive shaft 21 to rotate synchronously, but also reserve sliding space for the subsequent axial lifting and lowering movement of the drive shaft 21, thereby driving the placement tray 2 to rotate synchronously, so that the cake to be baked on the placement tray 2 can obtain the condition of uniform circumferential heating.

[0041] The transmission sleeve 63 is connected to the lower end of the transmission shaft 21, and the transmission sleeve 63 remains axially fixed relative to the transmission shaft 21. See attached diagram for details. Figure 5 and 7 As shown, the transmission sleeve 63 has an embedded bearing, and the transmission shaft 21 passes through the inner ring 671 of the bearing in the transmission sleeve 63. The transmission sleeve 63 is equipped with snap rings on both sides of the bearing. This assembly structure fixes the transmission sleeve 63 relative to the inner ring 671 of the bearing, which can ensure the circumferential rotational freedom of the transmission shaft 21 and ensure that when the transmission sleeve 63 moves up and down relative to the support seat 11, it can drive the transmission shaft 21 to move up and down synchronously through the axial fixing relationship, and finally drive the placement plate 2 to move up and down stably in the processing chamber 101.

[0042] As attached Figure 10 and 11 As shown, the center of the worm gear 62 is fixed to the first rotating shaft 621, which is restricted to rotate within the support base 11. Specifically, the two sides of the horizontally transverse vertical plate 113 are fixed with second bearing seats 622. The two ends of the first rotating shaft 621 are respectively embedded in the two second bearing seats 622, thereby achieving the axial horizontal positioning of the first rotating shaft 621, thereby restricting the axial displacement of the worm gear 62, so that the worm gear 62 retains only the circumferential rotational freedom relative to the support base 11, and the worm gear 62 and the worm 61 maintain a stable meshing state.

[0043] Continue to refer to the appendix Figure 10 and 11 The end of the first rotating shaft 621 is connected to the rocker arm 64 via an eccentric bearing 67. Specifically, the first rotating shaft 621 passes through the inner ring 671 of the eccentric bearing 67, and external retaining rings are fitted on both ends of the first rotating shaft 621 at the eccentric bearing 67 to achieve axial limitation of the eccentric bearing 67. One end of the rocker arm 64 is configured as a bushing 641, which is fixedly fitted on the outer ring 672 of the eccentric bearing 67. Retaining rings are fitted inside the bushing 641 on both ends of the outer ring 672 of the eccentric bearing 67 for axial limitation, so that the rocker arm 64 retains only circumferential rotational freedom relative to the outer ring 672 of the eccentric bearing 67. This double snap ring limiting structure can effectively prevent axial movement between the eccentric bearing 67 and the first rotating shaft 621 and the swing arm 64 bushing 641, ensuring that the eccentric motion trajectory of the eccentric bearing 67 is controllable, and ensuring that the circumferential rotation of the first rotating shaft 621 can be stably converted into the reciprocating swing of the swing arm 64, providing a reliable power transmission basis for the subsequent driving of the lifting and lowering of the placement plate 2.

[0044] Please refer to the appendix. Figure 5 and 13 As shown, the linkage assembly 65 includes a first linkage 651 and a second linkage 652. One end of the first linkage 651 is pivotally connected to the transmission sleeve 63. In this embodiment, the pivot connection can be achieved by inserting a pin, allowing the two pivotally connected components to retain only the degree of freedom of rotation relative to each other. The other end of the first linkage 651 is pivotally connected to the second linkage 652. The second linkage 652 is also pivotally connected to the end of the rocker arm 64 away from the eccentric bearing 67. This multi-segment pivot structure of the linkage assembly 65 can construct a stable power transmission path, converting the reciprocating oscillation of the rocker arm 64 into the axial linear motion of the transmission sleeve 63, providing reliable structural support for the smooth lifting and lowering of the placement plate 2.

[0045] The drive motor 5 is fixed on the base plate 112 of the support 11, and the output shaft of the drive motor 5 and the end of the worm gear 61 away from the spline shaft 611 are transmitted through a bevel gear structure, so that the drive motor 5 drives the worm gear 61 to rotate automatically. When the worm gear 61 rotates, it drives the transmission shaft 21 to rotate through the spline shaft 611, thereby driving the placement tray 2 to rotate. The cake to be baked on the placement tray 2 rotates relative to the ventilation holes of the baffle 3, so as to achieve uniform heating of the annular surface of the cake to be baked. As the worm gear 61 rotates, it meshes with the worm wheel 62, causing the first rotating shaft 621 to drive the eccentric bearing 67 to rotate. The eccentric bearing 67, in conjunction with the swing arm 64, swings. The swing arm 64, through the transmission of the first connecting rod 651 and the second connecting rod 652, drives the transmission sleeve 63 to move axially along the spline shaft 611, thereby causing the placement tray 2 to rotate and rise synchronously. This allows the cake to be baked on the placement tray 2 to continuously circulate through the gradient hot air flow field formed by three sets of ventilation holes with different diameters during circumferential rotation. Compared to the method of achieving uniform circumferential heating by relying solely on rotation, the synchronous lifting design allows each part of the cake to alternately pass through hot air flow fields with different air volumes during rotation, adapting to the baking needs of different height parts of the cake and avoiding differences in the degree of baking between the upper and lower parts of the cake due to the action of a single air volume. This structural design achieves synchronous power coupling of the rotation and lifting of the placement tray 2, significantly improving the overall baking consistency of the cake.

[0046] Furthermore, please refer to the appendix. Figure 6 and 10 The second link 652 is pivotally connected to the middle of the rocker arm 64. The link assembly 65 also includes a third link 653 and a tension spring 68. One end of the third link 653 is pivotally connected to the support seat 11, and the other end of the third link 653 is pivotally connected to the end of the second link 652 away from the first link 651. (See attached diagram.) Figure 14 and 15 The second link 652 is fixed to the limiting rod 654, which is located on the side of the second link 652 facing away from the push rod 66. The two ends of the tension spring 68 are connected to the second link 652 and the third link 653 respectively. The elastic force of the tension spring 68 pulls the limiting rod 654 against the surface of the third link 653, so that the second link 652 and the third link 653 are kept parallel and combined in the same straight line to form a straight rod structure. This structure can eliminate the gap that may occur in the linkage transmission process, ensure that the swing rod 64 drives the second link 652 to swing stably, and improve the reliability of power transmission.

[0047] Please refer to the appendix. Figure 12The push rod 66 is connected to the support base 11, and the push rod 66 moves relative to the pivot joint of the third link 653 and the second link 652. The push rod 66 can be connected to the support base 11 in the following manner: upright plates 113 are fixed on both sides between the top plate 111 and the bottom plate 112 of the support base 11; horizontal bars 114 are fixed on both sides between the two upright plates 113; a mounting plate 115 is fixed between the two horizontal bars 114; the third link 653 is located between the two upright plates 113; and the push rod 66 is connected to the mounting plate 115 and moves relative to the pivot joint of the third link 653 and the second link 652. (See attached diagram) Figure 16 and 17 As shown, after the push rod 66 moves and adjusts towards the pivot point of the third link 653 and the second link 652, when the swing rod 64 drives the second link 652 towards the push rod 66, the push rod 66 blocks the pivot point of the third link 653 and the second link 652, causing the second link 652 to continue swinging towards the push rod 66 against the elastic force of the tension spring 68, thereby increasing the downward stroke of the transmission sleeve 63. That is, the closer the push rod 66 moves towards the pivot point of the third link 653 and the second link 652, the greater the downward stroke of the transmission sleeve 63; conversely, the farther the push rod 66 moves towards the pivot point of the third link 653 and the second link 652, the greater the reduction in the downward stroke of the transmission sleeve 63.

[0048] Therefore, by changing the position of the pivot point of the push rod 66 relative to the third link 653 and the second link 652, the stroke of the placement tray 2 in the processing chamber 101 can be changed. This structural design enables the placement tray 2 to be raised and lowered relative to the three sets of ventilation holes in a controllable manner. The placement tray 2 can be selectively moved relative to one, two, or three sets of ventilation holes. The cake to be baked can flexibly switch temperature zones at different baking stages. In the early stage of baking, it is placed in the upper high-temperature zone to start the batter solidification and shaping. In the middle stage of baking, it is lowered to the middle temperature zone to ensure that the inside is evenly cooked. In the later stage of baking, it is lowered to the lowest low-temperature zone to slowly set and cool down, reducing the possibility of the cake cracking due to excessive temperature difference. This significantly improves the flexibility of baking operations and the consistency of the quality of the finished cake.

[0049] Furthermore, the heating device also includes an adjusting cylinder 661, which is fixed inside the support base 11, specifically on the side of the mounting plate 115 facing away from the third connecting rod 653. The adjusting cylinder 661 is an actuator such as a cylinder, hydraulic cylinder, or electric push rod with a piston rod, and the piston rod of the adjusting cylinder 661 passes through the mounting plate 115 and connects to the push rod 66. In this way, the position of the push rod 66 relative to the pivot point of the third connecting rod 653 and the second connecting rod 652 is automatically adjusted by the extension and retraction of the piston rod of the adjusting cylinder 661, so as to realize the automatic control of the lifting stroke of the placement tray 2, allowing the cake to be baked to adaptively switch to the corresponding temperature zone according to the baking process requirements, thereby achieving adaptive temperature control.

[0050] Preferably, the device of the present invention may also be equipped with a control system, which may be a PLC control system. Stroke sensors are installed on the sides of the upright plate 113 of the support base 11 at the limit positions of the lifting safety travel of the placement tray 2. The stroke sensors are connected to the control system, and the stroke sensors trigger the generation of signals upon contact with the transmission sleeve 63. When the placement tray 2 rises to the preset limit position, the stroke sensors provide real-time feedback signals to the control system, which immediately issues commands to stop the drive motor 5 and the adjusting cylinder 661, effectively preventing the placement tray 2 from colliding or leaving the ventilation hole's working area due to excessive lifting, further improving the reliability and safety of the equipment operation.

[0051] The control system is also used to control the operation of the drive motor 5, the regulating cylinder 661, the electric heating component 41, and the fan 42 to achieve automated baking. The specific operation mode is as follows: System startup and parameter initialization: The operator inputs the corresponding baking process parameters through the human-machine interaction module of the control system according to the type and specifications of the cake to be baked, including the total baking time, temperature zone adaptation parameters for each stage, speed parameters of drive motor 5, and stroke control parameters of regulating cylinder 661. After the parameters are input, the system is started and the control system performs an initialization self-check to confirm that the electric heating component 41, fan 42, drive motor 5, regulating cylinder 661, temperature zone of processing chamber 101, and other components are in normal condition. Drive motor 5 starts and initial motion execution: The control system issues a command to start drive motor 5. Drive motor 5 drives worm 61 to rotate through bevel gear structure. Worm 61 drives transmission shaft 21 and placement plate 2 to rotate synchronously through spline engagement, so as to achieve uniform heating of the cake around the circumference. On the other hand, through the meshing transmission of worm 61 and worm wheel 62, it drives the first rotating shaft 621 and eccentric bearing 67 to rotate, which in turn drives swing arm 64 and connecting rod assembly 65 to drive transmission sleeve 63 and placement plate 2 to move. At this time, adjustment cylinder 661 is not activated, push rod 66 is in the initial limit position, and placement plate 2 only rises and falls slightly in the area of ​​the third ventilation hole group at the top, completing the initial shaping of the cake surface. Adjusting cylinder 661 adaptive control and temperature zone expansion switching: According to the preset baking process parameters, after the preset surface setting time is reached, the control system sends an extension command to the adjusting cylinder 661 in real time. The piston rod of the adjusting cylinder 661 drives the push rod 66 to move relative to the pivot part of the third connecting rod 653 and the second connecting rod 652. By adjusting the limit position of the push rod 66, the lifting stroke of the transmission sleeve 63 and the placement tray 2 is changed, so that the lowering stroke of the placement tray 2 gradually increases. In turn, the cake can be extended to the second ventilation hole group and the first ventilation hole group area in sequence according to the process requirements during circumferential rotation, so as to achieve the effect of circulating through the gradient hot air flow field formed by three groups of ventilation holes with different diameters. Real-time monitoring and parameter fine-tuning of the baking process: The control system monitors the running status of the drive motor 5, the stroke position of the regulating cylinder 661 and the temperature distribution of the processing chamber 101 in real time throughout the baking process. If the parameters are detected to deviate from the preset value, a correction command is immediately issued to ensure that the rotation and lifting movements of the placement tray 2 are synchronized and coordinated, and the temperature zone switching is stable and reliable, avoiding local over-baking or under-baking. Baking Completion and System Reset: When the baking time reaches the preset value, the control system issues a command to stop the drive motor 5 and the regulating cylinder 661, and the placement tray 2 stops moving and resets to the initial position, completing the entire automated baking operation process.

[0052] The above method involves the operator inputting baking process parameters to start the system. The drive motor 5 drives the worm gear 61 to rotate via a bevel gear. The worm gear 61 drives the transmission shaft 21 and the placement tray 2 to rotate circumferentially. On the other hand, it drives the placement tray 2 to rise and fall through the worm wheel 62, the first rotating shaft 621, the eccentric bearing 67, and the connecting rod assembly 65. In the initial stage, the adjusting cylinder 661 is not activated and the push rod 66 is in the initial limit position. The placement tray 2 only rises and falls slightly in the uppermost third ventilation hole group area to complete the surface shaping of the cake. Subsequently, the adjusting cylinder drives the push rod 66 to move and change the limit position, thereby adjusting the lifting stroke of the transmission sleeve 63 and the placement tray 2. During the continuous circumferential rotation of the placement tray 2, the cake can be carried to the second ventilation hole group and the first ventilation hole group area in sequence. It circulates through the gradient hot air flow field formed by the three groups of ventilation holes with different diameters, which fully adapts to the hot air action requirements of each temperature zone and effectively ensures the uniformity of baking.

[0053] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using the concept of the present invention shall constitute an infringement of the protection scope of the present invention.

Claims

1. An adaptive temperature-regulating and rotating cake baking device for uniform heating, characterized in that, The heating device includes: The housing, with a fixed support base at the bottom inside the housing; A placement tray is provided, with a drive shaft fixed below it. The drive shaft passes through the support base and is restricted to axial lifting and circumferential rotation relative to the support base. The box contains baffles on both sides of the support base, forming an air duct between the two baffles and the inner wall of the box. An air inlet is provided below one of the baffles, and a return air duct is connected below the other baffle. A hot air device is disposed in the support base, and the air outlet of the hot air device corresponds to the air inlet, and the end of the return air pipe away from the baffle corresponds to the hot air device. The transmission mechanism includes: A worm gear is vertically connected to the support base, and the axial direction of the worm gear is limited to be fixed relative to the support base. A spline shaft is fixed at the upper end of the worm gear. A spline hole is formed inside the hollow transmission shaft, and the upper end of the spline shaft passes through the spline hole of the transmission shaft. A transmission sleeve is connected to the lower end of the transmission shaft and is axially fixed relative to the transmission shaft. A worm gear, the center of which is fixed to a first rotating shaft, the first rotating shaft is restricted to rotate within the support seat, so that the worm gear and the worm mesh, and an eccentric bearing is fitted at the end of the first rotating shaft, the first rotating shaft passing through the inner ring of the eccentric bearing; A swing arm, one end of which is fixedly sleeved on the outer ring of the eccentric bearing; A linkage assembly, comprising a first link, a second link, a third link, and a tension spring, wherein one end of the first link is pivotally connected to the transmission sleeve, the other end of the first link is pivotally connected to the second link, the second link is also pivotally connected to the end of the rocker arm away from the eccentric bearing, one end of the third link is pivotally connected to the support seat, the other end of the third link is pivotally connected to the end of the second link away from the first link, and the two ends of the tension spring are respectively connected to the second link and the third link; A push rod is connected to the support base and moves relative to the pivot joint of the third link and the second link. The second link is fixed with a limiting rod located on the side of the second link opposite to the push rod. The elastic force of the tension spring pulls the limiting rod against the surface of the third link. An adjusting cylinder is fixed inside the support base, and the piston rod end of the adjusting cylinder is fixed to the push rod; The surfaces of both baffles located above the support base are provided with multiple sets of ventilation holes. These multiple sets of ventilation holes are arranged from bottom to top as a first ventilation hole group, a second ventilation hole group, and a third ventilation hole group. The diameter of each ventilation hole in the first ventilation hole group is smaller than that in the second ventilation hole group, and the diameter of each ventilation hole in the second ventilation hole group is smaller than that in the third ventilation hole group. When the worm rotates and drives the transmission shaft through the spline shaft, thereby driving the placement disk to rotate, the worm meshes with the worm wheel and rotates synchronously. The first rotating shaft then drives the eccentric bearing to rotate, and the eccentric bearing, in conjunction with the swing arm, swings the swing arm, which drives the transmission sleeve to move axially along the spline shaft, causing the placement disk to rise and fall relative to the first ventilation hole group, the second ventilation hole group, and the third ventilation hole group.

2. The heating device as described in claim 1, characterized in that, The hot air device includes an electric heating component and a fan. The electric heating component converts electrical energy into heat energy to heat the air. The electric heating component is located between the air inlet and the fan, and the air outlet of the fan faces the electric heating component.

3. The heating device as described in claim 1, characterized in that, The transmission sleeve has an embedded bearing, the transmission shaft passes through the inner ring of the bearing in the transmission sleeve, and the transmission sleeve is fixed relative to the inner ring of the bearing in the transmission sleeve.

4. The heating device as described in claim 1, characterized in that, The support base includes a top plate, a bottom plate, and a vertical plate. The vertical plate is fixed between the top plate and the bottom plate. The hot air device is located between the top plate and the bottom plate. The worm gear and the worm are both connected to the vertical plate. The bottom plate is fixed to the housing. The drive shaft passes through the top plate, so that the placement tray is located above the top plate.

5. The heating device as described in claim 1, characterized in that, The support base includes a top plate, a bottom plate, vertical plates, and horizontal bars. Two vertical plates are fixed between the top plate and the bottom plate. Horizontal bars are fixed on both sides between the two vertical plates. An mounting plate is fixed between the two horizontal bars. A third connecting rod is located between the two vertical plates. An adjusting cylinder is fixed to the mounting plate, and the piston rod of the adjusting cylinder passes through the mounting plate and connects to the push rod.

6. A method for operating a heated device as described in any one of claims 1 to 5, characterized in that, The method is as follows: Initial motion execution: The hot air device is activated, and while the placement tray rotates axially, it only rises and falls slightly within the area of ​​the third ventilation hole group to complete the initial shaping of the cake surface; Temperature zone expansion switching: Change the descent stroke of the placement tray so that the cake can be extended to the second ventilation hole group or the first ventilation hole group area in sequence according to process requirements during circumferential rotation, so as to achieve the effect of circulating through the gradient hot air flow field formed by three groups of ventilation holes with different diameters. Baking complete and system reset: The placement tray and the hot air device stop working, the placement tray stops moving and resets to the initial position, completing the entire automated baking operation process.

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