An oven with adjustable lift

Abstract

The utility model provides a kind of oven of liftable adjustment belongs to oven technical field.The oven of liftable adjustment includes box, box includes inner bag and shell, shell is set at the periphery of inner bag, the top of inner bag is provided first heating assembly;The outer wall of inner bag is also provided with connecting rod drive structure, connecting rod drive structure includes drive end and output, the drive end of connecting rod drive structure is exposed outside shell, and the output of connecting rod drive structure is connected with first heating assembly;So that it can be moved by drive end drive output, so that first heating assembly is lifted inside inner bag.The oven can realize the flexible adjustment of heating distance, easy to operate and safe, can improve the use experience of user.

Description

Technical Field

[0001] This utility model relates to the field of oven technology, and in particular to an oven with adjustable height. Background Technology

[0002] Ovens, as a common cooking appliance, work by generating high temperatures through internal heating elements to bake and heat food. Currently, most mainstream household and commercial ovens on the market have fixed heating elements (usually including upper and lower heating elements). This fixed placement creates a trade-off between cooking results and heating distance. For example, for larger or thicker foods (such as whole chickens or large pieces of roast meat), the top surface is too close to the upper heating element, easily leading to over-browning or even burning of the surface, while the inside may not be fully cooked. For foods requiring rapid surface caramelization or flattened foods (such as pizzas, toast, and steaks), the fixed heating element often cannot provide a sufficiently close heating distance, resulting in insufficient browning and crispiness.

[0003] Therefore, improvements are needed to existing ovens with fixed heating element positions to overcome the limitations of the technology. Summary of the Invention

[0004] To overcome the problems existing in related technologies, one of the objectives of this utility model is to provide an oven with adjustable height, which can flexibly adjust the heating distance, is easy to operate and safe, and can improve the user experience.

[0005] An adjustable oven includes: The housing includes an inner liner and an outer shell, the outer shell being disposed around the inner liner, and a first heating element being disposed above the inner liner; The outer wall of the inner liner is also provided with a linkage drive structure, which includes a drive end and an output end. The drive end of the linkage drive structure is exposed outside the outer shell, and the output end of the linkage drive structure is connected to the first heating element. This allows the output end to be moved by the drive end, thereby causing the first heating element to rise and fall inside the inner liner.

[0006] In a preferred embodiment of this utility model, the side wall of the inner liner is provided with a first guide groove arranged along the height direction of the inner liner, and the first guide groove penetrates the side wall of the inner liner. The outer wall of the first guide groove is fitted with a sliding sleeve that can slide along the height direction of the inner liner, and the output end of the connecting rod drive structure is hinged to the sliding sleeve.

[0007] In a preferred embodiment of this utility model, two first guide grooves are respectively provided on two opposite side walls of the inner liner, and a sliding sleeve that can slide along the height direction of the inner liner is fitted on the outer wall of each first guide groove. A connecting rod is provided between the two sliding sleeves, and the output end of the connecting rod drive structure is hinged to the sliding sleeve.

[0008] In a preferred embodiment of this utility model, the linkage drive structure includes a main rod, one end of which is pivotally connected to the side wall of the oven, and the other end is provided with a handle. The handle is exposed outside the outer shell of the oven, and the handle forms the drive end of the linkage drive structure. The main rod is provided with an oblong hole, and a connecting shaft is provided in the oblong hole; the linkage drive structure also includes a first driven rod and a second driven rod, one end of the first driven rod is pivotally connected to the side wall of the oven, and the other end is hinged to the connecting shaft; one end of the second driven rod is pivotally connected to the side wall of the oven, and the other end forms the output end of the linkage drive structure.

[0009] In a preferred embodiment of this invention, the waist-shaped hole is provided with a plurality of positioning grooves for limiting the position of the connecting shaft, and the positioning grooves are interconnected.

[0010] In a preferred embodiment of this invention, one linkage drive structure is provided on each of the two side walls of the inner liner; the main rods of the two linkage drive structures are connected by a follower guide rod. The inner liner has a second guide groove on each of its two opposite side walls, and the two ends of the follower guide rod pass through one of the second guide grooves and are connected to the main rod.

[0011] In a preferred embodiment of this invention, a drive motor is provided on the side wall of the inner liner, and the output end of the drive motor is connected to the drive end of the linkage drive structure, thereby driving the linkage drive structure to move.

[0012] In a preferred embodiment of this invention, a distance sensor is provided at the top of the inner wall of the inner liner, and the distance sensor is positioned toward the first heating component.

[0013] In a preferred embodiment of this invention, the outer wall of the housing is further provided with a display screen, which is electrically connected to the ranging sensor.

[0014] In a preferred embodiment of this invention, the first heating component includes a reflector and a heating tube, the output end of the linkage drive structure is fixedly connected to the reflector, and the heating tube is fixed to the bottom of the reflector. The bottom of the inner liner is provided with a second heating component corresponding to the first heating component.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a height-adjustable oven, which includes a cabinet comprising an inner liner and an outer shell. The outer shell is disposed around the inner liner, and a first heating element is disposed above the inner liner. A linkage drive structure is also provided on the outer wall of the inner liner. The linkage drive structure includes a drive end and an output end. The drive end of the linkage drive structure is exposed outside the outer shell, and the output end of the linkage drive structure is connected to the first heating element. This allows the output end to be moved by the drive end, thereby raising and lowering the first heating element inside the inner liner. This oven can drive the first heating element to rise and fall within the inner liner via the linkage drive structure, allowing users to flexibly adjust the distance between the heating element and the food according to the needs of different ingredients and recipes (e.g., raising the heating element to prevent burning when roasting a whole chicken, or lowering it to achieve crispness when baking pizza). This solves the inherent contradiction of fixed heating elements being unable to handle multiple cooking scenarios, thus improving the diversity and quality of cooking results. Furthermore, operation via the exposed drive end eliminates the need for users to open the oven door or manually change heavy racks or touch the heating element in a high-temperature environment. The entire adjustment process can be easily completed outside the oven, greatly improving the user experience and operational safety, and effectively avoiding the risk of burns. Attached Figure Description

[0016] Figure 1 This is a perspective view of the height-adjustable oven provided in an embodiment of this utility model; Figure 2 This is a perspective view of the outer wall of the inner cavity of the height-adjustable oven provided in an embodiment of this utility model; Figure 3 This is a side view of the outer wall of the inner cavity of the height-adjustable oven provided in an embodiment of this utility model; Figure 4 This is a schematic diagram showing the connection between the linkage drive structure and the first heating component provided in an embodiment of this utility model; Figure 5 This is a bottom view of the connection between the linkage drive structure and the first heating component provided in an embodiment of this utility model; Figure 6 This is a perspective view of a linkage drive structure including a positioning groove provided in an embodiment of the present invention; Figure 7 This is a perspective view of the main rod including the positioning groove provided in an embodiment of this utility model.

[0017] Figure label: 1. Housing; 11. Outer shell; 12. Inner liner; 121. First guide groove; 122. Connecting rod; 123. Sliding sleeve; 124. Second guide groove; 3. Linkage drive structure; 31. Main rod; 311. Handle; 312. Waist-shaped hole; 3121. Positioning groove; 32. First driven rod; 33. Second driven rod; 34. Connecting shaft; 4. Follow-up guide rod; 5. First heating element; 51. Reflector; 52. Heating tube. Detailed Implementation

[0018] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0019] Ovens, as a common cooking appliance, work by generating high temperatures through internal heating elements to bake and heat food. Currently, most mainstream household and commercial ovens on the market have fixed heating elements (usually including upper and lower heating elements). This fixed placement creates a trade-off between cooking results and heating distance. For example, for larger or thicker foods (such as whole chickens or large pieces of roast meat), the top surface is too close to the upper heating element, easily leading to over-browning or even burning of the surface, while the inside may not be fully cooked. For foods requiring rapid surface caramelization or flattened foods (such as pizzas, toast, and steaks), the fixed heating element often cannot provide a sufficiently close heating distance, resulting in insufficient browning and crispiness.

[0020] Based on this, this application provides an oven with adjustable height.

[0021] Example 1 like Figures 1-7 As shown, this embodiment provides a height-adjustable oven, comprising: Box 1, the box 1 includes an inner liner 12 and an outer shell 11, the outer shell 11 is disposed around the inner liner 12, and a first heating element 5 is disposed above the inner liner 12; The outer wall of the inner liner 12 is also provided with a linkage drive structure 3, which includes a drive end and an output end. The drive end of the linkage drive structure 3 is exposed outside the outer shell 11, and the output end of the linkage drive structure 3 is connected to the first heating component 5. This allows the output end to be moved by the drive end, thereby causing the first heating component 5 to rise and fall inside the inner liner 12.

[0022] Specifically, this application provides a linkage drive structure 3 on the outer wall of the inner liner 12 (i.e., in the interlayer space between the inner liner 12 and the outer shell 11). This structure mainly includes a drive end and an output end.

[0023] The drive end can be a knob or handle, directly exposed on the oven's outer shell 11 panel, allowing the user to easily access and operate it from the outside while the oven is in operation. The output end can be movably connected to the first heating element 5 located inside the inner liner 12. This connection can be a hinged joint achieved through a hinge or pivot, thus forming a stable planar linkage mechanism. The internal transmission mechanism of the linkage drive structure 3 can convert the rotational motion of the drive end into the linear motion of the output end. A preferred implementation is to use a worm gear mechanism. When the user rotates the external knob (drive end), the worm drives the worm wheel to rotate, and a crank or connected push rod coaxial with the worm wheel then moves linearly up and down as the output end. The linear motion of the output end then pushes and pulls the first heating element 5 through the linkage, causing it to rise or fall smoothly within the inner liner 12.

[0024] To ensure the oven's sealing performance and safety, a high-temperature resistant and flexible sealing ring is installed at the hole where the connecting rod passes through the inner cavity 12 wall. This sealing ring can tightly wrap the connecting rod, effectively preventing heat and grease vapor in the cooking cavity from leaking into the interlayer, protecting the internal circuit components and maintaining the oven's efficiency.

[0025] Even better, a clear height indicator can be provided around the exposed drive end knob, which can intuitively display the relative height position of the first heating element 5, making it convenient for users to make precise adjustments and reproduce successful cooking settings.

[0026] When using this oven, if the user needs to adjust the height of the upper heating element 52—for example, raising the heating element 52 to prevent the top from burning when roasting a whole chicken, or lowering the heating element 52 to achieve a crispy crust when baking pizza—the user simply drives the first heating element 5 from outside the oven via the drive unit, causing it to smoothly rise and fall to the desired height. The entire adjustment process does not require opening the oven door, making it safe, intuitive, and effortless.

[0027] This oven breaks away from the limitations of traditional ovens where the heating element 52 is fixed in position. Users can flexibly and precisely control the distance between the heating element 52 and the food surface according to the characteristics of different ingredients and the requirements of the recipe. This directly optimizes the efficiency of heat radiation transfer: lowering the heating element 52 when high heat is needed and raising it when low heat is needed. This perfectly solves common cooking problems such as "the surface of the food is burnt while the inside is uncooked" or "the surface is not browned enough to develop a caramelized flavor," significantly expanding the oven's cooking range and improving the diversity and quality of the finished products.

[0028] Furthermore, users do not need to open the oven door during high-temperature cooking, completely avoiding the risk of burns from touching hot racks or heating elements with bare hands. The adjustment process is effortless and intuitive, as simple as adjusting a knob, completely changing the inconvenient experience of needing to disconnect the power to cool down and laboriously replace racks. It makes it possible to dynamically adjust the heat according to the cooking status, greatly improving the user's sense of control and satisfaction.

[0029] In a specific embodiment, the side wall of the inner liner 12 is provided with a first guide groove 121 arranged along the height direction of the inner liner 12, and the first guide groove 121 penetrates the side wall of the inner liner 12. The outer wall of the first guide groove 121 is fitted with a sliding sleeve 123 that can slide along the height direction of the inner liner 12, and the output end of the connecting rod drive structure 3 is hinged to the sliding sleeve 123.

[0030] Furthermore, two first guide grooves 121 are respectively provided on the two opposite side walls of the inner liner 12, and a sliding sleeve 123 that can slide along the height direction of the inner liner 12 is fitted on the outer wall of each first guide groove 121. A connecting rod 122 is provided between the two sliding sleeves 123, and the output end of the connecting rod drive structure 3 is hinged to the sliding sleeve 123. The connecting rod 122 rigidly connects the two sliding sleeves 123 into an integral frame, ensuring their synchronization during movement. The output end of the connecting rod drive structure 3 can be hinged to one of the sliding sleeves 123, or preferably, it is hinged to the middle of the connecting rod 122. When the drive structure is activated, its output end pushes or pulls one sliding sleeve 123, and the power is instantly transmitted to the other sliding sleeve 123 through the connecting rod 122, thereby achieving synchronous and smooth lifting and lowering of the two sliding sleeves 123.

[0031] The mating surface between the sliding sleeve 123 and the guide groove is located on the outside of the inner liner 12, where the working environment is relatively mild, allowing for the use of more wear-resistant materials. This design reduces direct friction between the moving parts and the wall of the inner liner 12, lowering the risk of wear over long-term use. This application provides a precise vertical trajectory for the movement of the sliding sleeve 123 by setting a dedicated first guide groove 121. This avoids possible lateral swaying or forward / backward tilting during lifting and lowering, ensuring that the first heating element 5 always moves smoothly along a straight line, thereby guaranteeing the stability of the heating area and the uniformity of food heating.

[0032] In a specific embodiment, the linkage drive structure 3 includes a main rod 31, one end of which is pivotally connected to the side wall of the oven, and the other end is provided with a handle 311. The handle 311 is exposed outside the outer shell 11 of the oven, and the handle 311 forms the drive end of the linkage drive structure 3. The main rod 31 is provided with an oblong hole 312, and a connecting shaft 34 is disposed in the oblong hole 312. The linkage drive structure 3 also includes a first driven rod 32 and a second driven rod 33. One end of the first driven rod 32 is pivotally connected to the side wall of the oven, and the other end is hinged to the connecting shaft 34. One end of the second driven rod 33 is pivotally connected to the side wall of the oven, and the other end forms the output end of the linkage drive structure 3. The main rod 31, the first driven rod 32 and the second driven rod 33, together with the fixed side wall of the oven, constitute a multi-link system. More preferably, a damper can be provided on the connecting shaft 34 to achieve self-locking of the multi-link system. This mechanism can achieve good self-locking at any position through the dead point or lever arm relationship between the rods. The heating element 52 can stay at any height without the need for an additional locking device, which is both safe and reliable.

[0033] In a preferred embodiment, the oblong hole 312 is provided with a plurality of positioning grooves 3121 for limiting the connecting shaft 34, and the positioning grooves 3121 are interconnected. In this embodiment, the positioning grooves 3121 can limit the connecting shaft 34, thereby ensuring the stability of the limiting of the connecting shaft 34. With the use of a damper, stable self-locking of the multi-link system can be achieved. In addition, the positioning grooves 3121 can also enable the multi-link system to achieve self-locking without relying on a damper.

[0034] Furthermore, one of the connecting rod drive structures 3 is respectively provided on each of the two side walls of the inner liner 12; the main rods 31 of the two connecting rod drive structures 3 are connected by a follower guide rod 4; The inner liner 12 has a second guide groove 124 on each of its two opposite side walls. The two ends of the follower guide rod 4 pass through a second guide groove 124 and are connected to the main rod 31.

[0035] The two main rods 31 are rigidly connected by a follower guide rod 4. This follower guide rod 4 ensures that the two main rods 31 rotate completely synchronously when the user operates the handle 311. The mechanism of "follower guide rod 4 - second guide groove 124" not only plays a synchronizing role, but also constitutes an additional, stable guide pair, constraining the movement trajectory of the entire linkage frame.

[0036] When the user pushes the exposed handle 311 upwards or downwards, the main rod 31 rotates around its pivot point. This rotation forces the oblong hole 312 within it to move relative to the connecting shaft 34, thereby pushing the first driven rod 32 through the connecting shaft 34. The movement of the first driven rod 32 then links to the second driven rod 33, ultimately converting the rotational force applied by the user to the handle 311 into a precise, mechanically advantageous linear push-pull motion at the output end of the second driven rod 33. This linear motion at the output end, through the sliding sleeve 123 and the linkage mechanism, ultimately drives the first heating element 5 to smoothly rise and fall. The entire process is completely synchronized by the mechanisms on both sides via the follower guide rod 4.

[0037] In a preferred embodiment, a distance sensor is provided on the top of the inner wall of the inner liner 12, and the distance sensor is positioned toward the first heating component 5.

[0038] Furthermore, the outer wall of the housing 11 is also provided with a display screen, which is electrically connected to the ranging sensor.

[0039] A distance sensor is fixedly installed on the top of the inner wall of the inner liner 12, preferably in the center or in an area away from direct high-temperature radiation. The probe of this distance sensor (e.g., an ultrasonic distance sensor or a laser distance sensor) is precisely oriented towards the first heating element 5 directly below (preferably towards its mounting bracket or a specific reflection point). This sensor can measure the instantaneous distance between itself and the upper surface of the first heating element 5 in a non-contact manner, in real time and with high accuracy. A display screen is integrated on the outer wall of the outer casing 11 (usually located on the control panel). This display screen is electrically connected to the distance sensor on the top of the inner liner 12 via built-in wires to the control circuit board. The display screen is used to receive and visually display the data from the distance sensor. When the user operates the linkage drive structure 3 via the external handle 311 to drive the first heating element 5 to rise or fall, the distance sensor on the top continuously measures. The measured distance data (i.e., the real-time height of the heating element 52) ​​is transmitted to the control system in real time and finally displayed on the display screen of the outer casing 11. The user can directly read a precise, quantified height value or relative position indication without relying on experience or guesswork. This eliminates the errors caused by relying on visual observation or label estimation in the past, making it possible to standardize and accurately reproduce cooking techniques.

[0040] More preferably, a cup-shaped or plate-shaped heat shield made of heat-insulating material (such as high-temperature silicone, ceramic fiber, polyimide, or Teflon) is placed below and around the ranging sensor.

[0041] This heat shield effectively blocks direct heat radiation from the heating components and the high-temperature environment inside the chamber, as well as some of the convection of hot air. A certain air gap is maintained between the heat shield and the sensor body, using the air itself as an insulation layer to form multiple layers of protection.

[0042] Furthermore, the first heating component 5 includes a reflector 51 and a heating tube 52, the output end of the linkage drive structure 3 is fixedly connected to the reflector 51, and the heating tube 52 is fixed to the bottom of the reflector 51; The bottom of the inner liner 12 is provided with a second heating element corresponding to the first heating element 5. The reflector 51 is a groove-shaped or arc-shaped cover formed by stamping high-reflectivity, high-temperature resistant metal sheet (such as aluminum or stainless steel). Its function is to efficiently reflect the heat energy radiated by the heating tube 52 to the rear and sides towards the center of the oven's cooking cavity. The heating tube 52 (such as a quartz tube or metal tube) is fixedly installed at the bottom of the opening of the reflector 51 through a high-temperature resistant insulating bracket, so that the heat radiation energy emitted by it is directly concentrated by the reflector 51. The output end of the linkage drive structure 3 (i.e., the end of the second driven rod 33) is fixedly connected to the back or side of the reflector 51 through a mounting bracket. Therefore, the entire first heating element 5 (including the reflector 51 and the heating tube 52 on it) is a rigid whole, and is synchronously raised and lowered under the drive of the linkage drive structure 3.

[0043] Connecting the output end of the linkage drive structure 3 to the reflector 51 is a clever design. It clearly separates the moving parts from the functional parts: the robust reflector 51 serves as an ideal load-bearing and mounting base, protecting the brittle heating element 52 from mechanical stress during lifting and lowering, thus improving the reliability and lifespan of the entire lifting system. At the same time, this also makes the first heating component 5 a standard, fully detachable and maintainable module, facilitating cleaning and replacement.

[0044] Example 2 This embodiment provides another way to adjust the first heating component.

[0045] In this embodiment, a drive motor is provided on the side wall of the inner liner 12, and the output end of the drive motor is connected to the drive end of the connecting rod drive structure 3, thereby driving the connecting rod drive structure 3 to move.

[0046] In practical applications, the drive motor is a low-speed, high-torque DC geared motor or a stepper motor. The output shaft of the drive motor (such as a worm gear output shaft) is connected to the drive end of the connecting rod drive structure 3—that is, the pivot of the main rod 31 that originally connected the handle 311—through a coupling or gear.

[0047] The user issues lifting commands via the oven's control panel (or a connected mobile app). The control panel sends an electrical signal to the drive motor, which then begins to rotate forward or in reverse. The motor's rotation directly drives the main rod 31 to rotate around its pivot point, which in turn drives the first driven rod 32 and the second driven rod 33 to move through the oblong hole 312 and the connecting shaft 34. Ultimately, the motor's rotational motion is converted into linear motion at the output end, thereby precisely and quietly driving the first heating element 5 to rise or fall to the preset height.

[0048] In this embodiment, the user can adjust the height of the heating element 52 simply by pressing a button or touching the touchscreen without any manual operation. This provides unparalleled convenience, especially when the user's hands are covered in flour, oil, or when it is inconvenient to apply force.

[0049] Even better, the motor drive, combined with feedback from a high-precision ranging sensor, can achieve millimeter-level positioning accuracy, far superior to the coarseness of manual adjustment.

[0050] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings. In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0051] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0052] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. For those skilled in the art, this utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An adjustable oven, characterized in that, include: The housing includes an inner liner and an outer shell, the outer shell being disposed around the inner liner, and a first heating element being disposed above the inner liner; The outer wall of the inner liner is also provided with a linkage drive structure, which includes a drive end and an output end. The drive end of the linkage drive structure is exposed outside the outer shell, and the output end of the linkage drive structure is connected to the first heating element. This allows the output end to be moved by the drive end, thereby causing the first heating element to rise and fall inside the inner liner.

2. The height-adjustable oven according to claim 1, characterized in that: The inner liner has a first guide groove on its side wall, which is arranged along the height of the inner liner and penetrates the side wall of the inner liner. The outer wall of the first guide groove is fitted with a sliding sleeve that can slide along the height direction of the inner liner, and the output end of the connecting rod drive structure is hinged to the sliding sleeve.

3. The height-adjustable oven according to claim 2, characterized in that: Two first guide grooves are respectively provided on the two opposite side walls of the inner liner, and a sliding sleeve that can slide along the height direction of the inner liner is fitted on the outer wall of each first guide groove. A connecting rod is provided between the two sliding sleeves, and the output end of the connecting rod drive structure is hinged to the sliding sleeve.

4. The height-adjustable oven according to any one of claims 1-3, characterized in that: The linkage drive structure includes a main rod, one end of which is pivotally connected to the side wall of the oven, and the other end is provided with a handle. The handle is exposed outside the outer shell of the oven and forms the drive end of the linkage drive structure. The main rod is provided with an oblong hole, and a connecting shaft is provided in the oblong hole; the linkage drive structure also includes a first driven rod and a second driven rod, one end of the first driven rod is pivotally connected to the side wall of the oven, and the other end is hinged to the connecting shaft; one end of the second driven rod is pivotally connected to the side wall of the oven, and the other end forms the output end of the linkage drive structure.

5. The height-adjustable oven according to claim 4, characterized in that: The waist-shaped hole is provided with a number of positioning grooves for limiting the position of the connecting shaft, and the positioning grooves are interconnected.

6. The height-adjustable oven according to claim 4, characterized in that: One of the linkage drive structures is provided on each of the two side walls of the inner liner; the main rods of the two linkage drive structures are connected by a follower guide rod. The inner liner has a second guide groove on each of its two opposite side walls, and the two ends of the follower guide rod pass through one of the second guide grooves and are connected to the main rod.

7. The height-adjustable oven according to any one of claims 1-3, characterized in that: The inner liner is equipped with a drive motor on its side wall. The output end of the drive motor is connected to the drive end of the linkage drive structure, thereby driving the linkage drive structure to move.

8. The height-adjustable oven according to any one of claims 1-3, characterized in that: A distance sensor is provided on the top of the inner wall of the inner liner, and the distance sensor is positioned facing the first heating component.

9. The height-adjustable oven according to claim 8, characterized in that: The outer wall of the housing is also provided with a display screen, which is electrically connected to the ranging sensor.

10. The height-adjustable oven according to any one of claims 1-3, characterized in that: The first heating component includes a reflector and a heating element. The output end of the linkage drive structure is fixedly connected to the reflector, and the heating element is fixed to the bottom of the reflector. The bottom of the inner liner is provided with a second heating component corresponding to the first heating component.

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