Oven

Abstract

The utility model discloses an oven, which belongs to the technical field of small kitchen appliances, solves the problems of poorer unfreezing effect and inconvenience in use of the oven in the prior art, and adopts the technical scheme that the oven mainly comprises a shell, a cavity, a heating pipe, a control center, an upper electrode plate, a lower electrode plate, a power supply module and a temperature sensor, the upper electrode plate and the lower electrode plate are located in the cavity, the oven comprises a baking mode in which the heating pipe works and an unfreezing mode in which a high-voltage electric field is formed between the upper electrode plate and the lower electrode plate, and the temperature sensor is used for obtaining the temperature of food in the cavity, converting the temperature into an electric signal and transmitting the electric signal to the control center. The control center controls the oven to enter an unfreezing mode when judging that the food temperature detected by the temperature sensor is lower than a preset temperature, and controls the oven to enter a baking mode when judging that the food temperature detected by the temperature sensor is not lower than the preset temperature. The unfreezing effect of the oven is improved, and the oven is more convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of small kitchen appliances, and in particular to an oven. Background Technology

[0002] Baking frozen foods directly can easily lead to problems such as souring, decreased taste, or nutrient loss. Adding a separate defrosting device is costly, and after defrosting, the food needs to be manually put back into the oven, which is inconvenient. Therefore, some existing technologies have integrated defrosting functions into ovens. For example, invention patent CN105962794A discloses a three-layer oven, including a cabinet, a heat preservation layer, a defrosting layer, and a sterilization and drying layer. The heat preservation layer can keep food such as rice, soup, etc. warm. The defrosting layer uses infrared heating to defrost food, and the sterilization and drying layer uses infrared sterilization. The three baking layers are independent of each other. However, the three-layer design may make the oven larger, which is not suitable for small kitchens or families with limited space. Furthermore, defrosted food still needs to be manually transferred to the baking layer, and infrared heating for defrosting is mainly concentrated on the surface of the food, which may result in the surface being defrosted while the inside remains frozen. Utility Model Content

[0003] The purpose of this invention is to provide an oven that solves the problems of poor defrosting effect and inconvenience of use in existing ovens, thereby improving the defrosting effect and making the oven more convenient to use.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: an oven, including a shell and a cavity disposed within the shell, wherein a heating tube is disposed within the cavity, the oven further including a control center, an upper electrode plate, a lower electrode plate, a power module, and a temperature sensor, wherein the upper electrode plate and the lower electrode plate are located within the cavity, and the upper electrode plate and the lower electrode plate are connected to the power module via a power cord, the oven including a baking mode in which the heating tube operates, and a defrosting mode in which a high-voltage electric field is formed between the upper electrode plate and the lower electrode plate, the temperature sensor being used to acquire the temperature of the food within the cavity and convert it into an electrical signal which is transmitted to the control center, the control center controlling the oven to enter the defrosting mode when the temperature of the food detected by the temperature sensor is lower than a preset temperature, and the control center controlling the oven to enter the baking mode when the temperature of the food detected by the temperature sensor is not lower than the preset temperature.

[0005] After adopting the above technical solution, this utility model has the following advantages: Integrating defrosting and baking functions into the same cavity avoids the volume problem caused by layered design, making the oven more compact and more user-friendly for small kitchens or families with limited space. It also avoids the tedious steps of manually transferring food, providing great convenience to users. Secondly, by setting up a control center and temperature sensor, the oven can automatically switch working modes (defrosting mode or baking mode) according to the food temperature detected by the temperature sensor through the control center, reducing the need for manual operation by users and further improving ease of use. Furthermore, using a high-voltage electric field for defrosting overcomes the defect of infrared heating being concentrated only on the surface of food, enabling food to defrost more evenly and avoiding the situation where the surface is defrosted while the inside remains frozen, thereby preserving the taste and nutritional components of the food as much as possible and improving the overall defrosting effect.

[0006] Furthermore, the upper electrode plate can move up and down relative to the lower electrode plate, and the upper electrode plate can rotate around the line connecting the center of the upper electrode plate and the center of the lower electrode plate.

[0007] Using the aforementioned technical solution, firstly, the upper electrode plate can move up and down relative to the lower electrode plate, adapting to foods of different heights and thicknesses. For example, for thicker frozen foods, the upper electrode plate can be moved upwards, increasing the space between the upper and lower electrode plates, allowing the frozen food to be completely placed within the electric field range for thawing. For thinner frozen foods, the upper electrode plate can be moved downwards appropriately, allowing the electric field to act more concentratedly on the food, improving thawing efficiency. Secondly, the upper electrode plate can rotate around its central line, allowing its angle to be adjusted according to the shape of the food. If the frozen food is irregularly shaped, rotating the upper electrode plate allows the electric field to better cover all parts of the food. During freezing, ice crystals inside the food usually grow along a certain direction, and a unidirectional electric field may not be able to completely destroy these ice crystal structures during thawing. The rotation of the upper electrode plate causes the electric field direction to change continuously, which can more effectively destroy the lattice structure of the ice crystals, accelerate the melting process of the ice crystals, and thus improve thawing efficiency. This ensures that every part of the food is subjected to a uniform electric field, further improving the uniformity of thawing. This allows for adjustment of the distance and angle between the upper and lower electrode plates according to the specific size and shape of the food, ensuring that the high-voltage electric field can act on the food more effectively, thereby improving the uniformity of thawing and reducing localized unthawed areas.

[0008] Furthermore, the upper electrode plate is provided with a terminal, and the peripheral surface of the terminal is provided with a conductive ring groove. The power line is connected to a conductive ring, which is sleeved in the conductive ring groove. The surface of the conductive ring is in contact with the groove wall of the conductive ring groove and can rotate relative to it.

[0009] By adopting the aforementioned technical solution, the conductive ring can rotate relative to the conductive ring groove, thus minimizing the twisting or tangling of the power cord as the upper electrode plate rotates. This protects the power cord from physical damage as much as possible and ensures the stability and safety of power transmission.

[0010] Furthermore, the upper electrode plate is provided with a terminal that is fixedly connected to the power cord, and the upper electrode plate can rotate forward and reverse, with the forward and reverse rotation of the upper electrode plate alternating in a cycle.

[0011] Using the aforementioned technical solution, during the freezing process, ice crystals inside food typically grow along a certain direction, and a unidirectional electric field may not be able to completely destroy these ice crystal structures during thawing. The alternating forward and reverse rotation of the upper electrode plate continuously changes the direction of the electric field, more effectively disrupting the lattice structure of the ice crystals and accelerating the melting process. From a microscopic perspective, it's like damaging the ice crystals from different directions, causing them to disintegrate more quickly. This method can significantly shorten thawing time and improve the oven's efficiency in thawing mode. Through the alternating forward and reverse rotation, even with frequent rotation of the upper electrode plate, excessive twisting or tangling of the power cord can be avoided as much as possible. This reduces the risk of damage to the power cord due to twisting, ensuring the stability and long-term reliability of power transmission.

[0012] Furthermore, the housing is provided with a through hole for the power cord to pass through and a storage cavity communicating with the through hole. The storage cavity is provided with a winding roller for winding the power cord and a torsion spring for driving the winding roller to return to its original rotation. The winding roller is rotatably connected to the storage cavity through the torsion spring so that the power cord between the power module and the upper electrode plate is kept taut.

[0013] By adopting the aforementioned technical solution, the combined design of the winding roller and torsion spring ensures that the power cord is always in an orderly winding state. As the upper electrode plate moves up and down and rotates, the winding roller can automatically release or retract excess power cord as needed, keeping the power cord under appropriate tension. Instead of the power cord being scattered randomly inside the oven, the power cord is prevented from getting tangled or knotted during use, making the overall appearance of the oven neater.

[0014] Furthermore, the housing is also provided with a thickness sensor for detecting the thickness of the food inside the cavity to control the amount of vertical movement of the upper electrode plate relative to the lower electrode plate; or, the housing is also provided with a distance sensor located above the lower electrode plate, the food is placed on the lower electrode plate, the distance sensor is used to detect the distance between the upper surface of the food on the lower electrode plate and the distance sensor, and the control center obtains the thickness of the food based on the detection value of the distance sensor.

[0015] By adopting the aforementioned technical solution, the thickness of the food is automatically detected and the distance between the upper and lower electrode plates is adjusted accordingly, ensuring that the electric field can act on the food more effectively and avoiding uneven defrosting as much as possible, thereby improving the overall efficiency and effect.

[0016] Furthermore, the cavity is equipped with a telescopic device and a drive motor located at the output end of the telescopic device. The telescopic device drives the drive motor to move up and down. The output end of the drive motor is fixedly connected to the upper electrode plate to drive the upper electrode plate to rotate.

[0017] By employing the aforementioned technical solution, the telescopic device can more precisely adjust the distance between the upper and lower electrode plates, ensuring that foods of varying thicknesses can be thawed in a suitable electric field environment. The drive motor can more accurately control the rotation angle of the upper electrode plate, allowing the electric field to better adapt to irregularly shaped foods. Through the coordinated operation of the telescopic device and the drive motor, the upper electrode plate can be adjusted to the optimal position and rotated to the appropriate angle to achieve uniform thawing, thus improving thawing efficiency and effectiveness.

[0018] Furthermore, the cavity is provided with a heat insulation plate that divides the cavity into a baking cavity and a heat insulation cavity, and the telescopic device and the drive motor are located inside the heat insulation cavity.

[0019] Using the aforementioned technical solution, the heat insulation plate divides the cavity into a baking cavity and a heat insulation cavity. The telescopic mechanism and drive motor are placed inside the heat insulation cavity, resulting in a more compact and orderly internal structure. This effectively protects the telescopic mechanism and drive motor from the high temperatures of the baking cavity, reducing the risk of electrical failures. In baking mode, the temperature inside the baking cavity rises to a high level. If the telescopic mechanism and drive motor were directly exposed to such a high-temperature environment, their internal electronic components and mechanical structures could easily be damaged by overheating. Placing them inside the heat insulation cavity allows them to operate in a relatively lower temperature environment, ensuring stable performance and extending their service life. The heat insulation plate also provides some sound insulation, reducing the noise generated by the drive motor during operation from being transmitted into the baking cavity, providing users with a quieter cooking environment.

[0020] Furthermore, the oven is also provided with a horizontal drive and a vertical drive located on the horizontal drive. The horizontal drive drives the vertical drive to move left and right. The output end of the vertical drive is fixedly connected to the upper electrode plate to drive the upper electrode plate to move back and forth.

[0021] By employing the aforementioned technical solution, the electric field between the upper and lower electrode plates can cover a wider area within the cavity. The position of the upper electrode plate can be dynamically adjusted according to the specific thawing progress and needs of the food. If it is found that one side of the food is thawing more slowly, the upper electrode plate can be moved towards that side to concentrate the force of the electric field and accelerate the thawing of that side.

[0022] Furthermore, the surface of the upper electrode plate facing the lower electrode plate is provided with a pointed structure or a needle-like structure.

[0023] The aforementioned technical solution is adopted. Based on the tip effect of the electric field, the charge will be highly concentrated at the tip, which will strengthen the electric field between the upper electrode plates at these parts. The tip structure or needle-like structure can concentrate the electric field and make it easier to generate air ionization (i.e., corona discharge) under the action of high voltage electric field, so that the current can penetrate the interior of the food more effectively. Especially in the defrosting mode, it can quickly break the ice crystal structure, achieve uniform defrosting from the inside out, and improve defrosting efficiency. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the oven structure when the upper electrode plate is at the first height in Embodiment 1 of this utility model;

[0026] Figure 2 This is a cross-sectional view of the oven when the upper electrode plate is at the first height in Embodiment 1 of this utility model;

[0027] Figure 3 In this utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0028] Figure 4 This is a cross-sectional view of the oven from another perspective when the upper electrode plate is at the first height in Embodiment 1 of this utility model.

[0029] Figure 5 This is a schematic diagram of the oven structure when the upper electrode plate rotates in Embodiment 1 of this utility model;

[0030] Figure 6 This is a cross-sectional view of the oven when the upper electrode plate rotates according to Embodiment 1 of this utility model;

[0031] Figure 7 This is a cross-sectional view of the oven from another perspective when the upper electrode plate rotates in Embodiment 1 of this utility model;

[0032] Figure 8 This is a schematic diagram of the oven structure when the upper electrode plate is at the second height in Embodiment 1 of this utility model;

[0033] Figure 9 This is a cross-sectional view of the oven when the upper electrode plate is at the second height in Embodiment 1 of this utility model;

[0034] Figure 10 This is a cross-sectional view of the oven in Embodiment 2 of this utility model;

[0035] Figure 11 This is a cross-sectional view of the oven when the upper electrode plate rotates in Embodiment 2 of this utility model;

[0036] Figure 12 This is a cross-sectional view of the oven in Embodiment 3 of this utility model;

[0037] Figure 13 This is a cross-sectional view of the oven in Embodiment 3 of this utility model from another perspective;

[0038] In the diagram, 10 is the shell; 11 is the cavity; 110 is the baking cavity; 111 is the heat insulation cavity; 112 is the heat insulation plate; 113 is the clearance hole; 114 is the clearance strip hole; 12 is the wire through hole; 13 is the storage cavity; 20 is the heating tube; 30 is the upper electrode plate; 301 is the terminal; 302 is the conductive ring groove; 303 is the tip structure; 31 is the lower electrode plate; 32 is the power module; 33 is the temperature sensor; 34 is the power cord; 35 is the conductive ring; 36 is the thickness sensor; 40 is the winding roller; 41 is the torsion spring; 50 is the drive motor; 51 is the power motor; 52 is the worm gear; 53 is the worm; 54 is the transmission component; 55 is the lead screw; 56 is the first slide rail; 57 is the first drive slider; 58 is the second slide rail; 59 is the second drive slider; and 60 is the connecting sleeve. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0040] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein.

[0041] It should be understood that in the various embodiments of this utility model, the number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this utility model.

[0042] It should be understood that in this invention, "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product or device.

[0043] It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, or Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Contains X, Y, and Z", "Contains X, Y, and Z" means that all three X, Y, and Z are contained; "Contains X, Y, or Z" means that one of X, Y, and Z is contained; "Contains X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are contained.

[0044] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0045] like Figures 1 to 9 As shown, this utility model provides an oven, including a shell 10 and a cavity 11 disposed within the shell 10. A heating tube 20 is disposed within the cavity 11. The oven also includes a control center, an upper electrode plate 30, a lower electrode plate 31, a power module 32, and a temperature sensor 33. The upper electrode plate 30 and the lower electrode plate 31 are located within the cavity 11 and are connected to the power module 32 via a power cord 34. The oven includes a baking mode in which the heating tube 20 operates, and a defrosting mode in which a high-voltage electric field is formed between the upper electrode plate 30 and the lower electrode plate 31. The temperature sensor 33 is used to acquire the temperature of the food inside the cavity 11 and convert it into an electrical signal, which is then transmitted to the control center. When the control center determines that the food temperature detected by the temperature sensor 33 is lower than a preset temperature, it controls the oven to enter the defrosting mode. When the control center determines that the food temperature detected by the temperature sensor 33 is not lower than the preset temperature, it controls the oven to enter the baking mode.

[0046] By integrating defrosting and baking functions into the same cavity 11, users do not need to purchase additional defrosting equipment, avoiding the volume issues caused by layered designs. This makes the oven more compact, making it more user-friendly for small kitchens or families with limited space. It also eliminates the tedious steps of manually transferring food, providing users with great convenience. Secondly, with the addition of a temperature sensor 33 and a control center, the oven can automatically switch between working modes (defrosting mode or baking mode) based on the food temperature detected by the temperature sensor 33, reducing the need for manual operation and further improving ease of use. Furthermore, by using a high-voltage electric field for defrosting, it overcomes the shortcomings of infrared heating that is concentrated only on the surface of the food, enabling the food to defrost more evenly and avoiding the situation where the surface is defrosted while the inside remains frozen. This ensures the best possible taste and nutritional content of the food, improving the overall defrosting effect.

[0047] It should be noted that ingredients prepared using other baking methods can also be thawed using the oven described in this application, thus broadening the oven's applicability.

[0048] Because different foods have varying thicknesses and shapes, and in existing technologies, the thawing area of ​​the thawing structure is relatively fixed, resulting in a relatively fixed direction and intensity of thawing. This can lead to uneven thawing and longer thawing times. Therefore, in this application, the upper electrode plate 30 can move vertically relative to the lower electrode plate 31 to accommodate foods of different heights and thicknesses. For example, for thicker frozen meats, the upper electrode plate 30 can be moved upwards to increase the space between the upper electrode plate 30 and the lower electrode plate 31, allowing the frozen food to be completely placed within the electric field range for thawing. For thinner foods, such as frozen dumplings, the upper electrode plate 30 can be moved downwards to concentrate the electric field on the food, improving thawing efficiency. Secondly, the upper electrode plate 30 can rotate around the line connecting the center of the upper electrode plate 30 and the center of the lower electrode plate 31. This allows the angle of the upper electrode plate 30 to be adjusted according to the shape of the food. If the frozen food is irregularly shaped, such as frozen chicken, rotating the upper electrode plate 30 allows the electric field to better cover all parts of the food. During freezing, ice crystals inside the food usually grow along a certain direction, and a unidirectional electric field may not be able to completely destroy these ice crystal structures during thawing. The rotation of the upper electrode plate 30 causes the electric field direction to change continuously, which can more effectively destroy the lattice structure of the ice crystals, accelerate the melting process of the ice crystals, and thus improve thawing efficiency. This ensures that every part of the food is subjected to a uniform electric field, thereby further improving the uniformity of thawing. This allows the distance and angle between the upper electrode plate 30 and the lower electrode plate 31 to be adjusted according to the specific size and shape of the food, ensuring that the high-voltage electric field can act on the food more effectively, thereby improving the uniformity of thawing and baking and reducing the occurrence of unthawed areas.

[0049] To further avoid uneven defrosting, the housing 10 is also equipped with a thickness sensor 36 for detecting the thickness of the food inside the cavity 11 to control the vertical movement of the upper electrode plate 30 relative to the lower electrode plate 31. By automatically detecting the thickness of the food and adjusting the distance between the upper electrode plate 30 and the lower electrode plate 31 accordingly, the electric field can be applied to the food more effectively, minimizing uneven defrosting and improving overall efficiency and effectiveness. For example, for thin-sliced ​​frozen dumplings, if the thickness is detected to be too thin, the control center will control the upper electrode plate 30 to move downwards a suitable distance, so that the electric field between the upper electrode plate 30 and the lower electrode plate 31 is more closely aligned with the dumpling, optimizing the electric field distribution and improving defrosting efficiency. For thick frozen steaks, the control center will correspondingly increase the upward movement of the upper electrode plate 30 to ensure that the steak is completely within the electric field range, guaranteeing uniform defrosting evenly inside the steak.

[0050] To further enhance defrosting capability, a pointed structure 303 is provided on the surface of the upper electrode plate 30 facing the lower electrode plate 31. Due to the tip effect of the electric field, charges accumulate at the pointed ends, strengthening the electric field between the upper electrode plates 30 at these locations. The pointed structure 303 concentrates the electric field, making it easier to generate air ionization (i.e., corona discharge) under a high-voltage electric field. This allows the current to penetrate the food more effectively, especially in defrosting mode, quickly breaking down ice crystals and achieving uniform defrosting from the inside out, thus improving defrosting efficiency.

[0051] It should be noted that the tip structure 303 can be a conical structure, and multiple tip structures 303 can be provided. Multiple tip structures 303 are evenly spaced on the surface of the upper electrode plate 30 facing the lower electrode plate 31, which can make the electric field more uniformly distributed in the entire area between the upper electrode plate 30 and the lower electrode plate 31. Each conical tip will generate a tip effect, causing charge to accumulate at its tip. These accumulation points will form a regular electric field enhancement region on the entire surface of the upper electrode plate 30.

[0052] To enable the lifting and rotation of the upper electrode plate 30, a telescopic device and a drive motor 50 are installed inside the cavity 11. The output end of the drive motor 50 is fixedly connected to the upper electrode plate 30. The telescopic device can more precisely adjust the distance between the upper electrode plate 30 and the lower electrode plate 31, ensuring that foods of different thicknesses can be thawed in a suitable electric field environment. The drive motor 50 can more accurately control the rotation angle of the upper electrode plate 30, allowing the electric field to better adapt to irregularly shaped foods. Through the coordinated work of the telescopic device and the drive motor 50, the upper electrode plate 30 can be adjusted to the optimal position and rotated to a suitable angle to achieve uniform thawing, thus improving the efficiency and effectiveness of thawing.

[0053] Specifically, the expansion joint includes a power motor 51, a worm gear 52, a worm 53, a transmission component 54, and a lead screw 55. The output end of the power motor 51 is fixedly connected to the worm 53, the worm gear 52 is connected to the worm 53, the lead screw 55 is fixed on the worm gear 52, the transmission component 54 is rotatably connected to the lead screw 55, and the drive motor 50 is fixed on the transmission component 54, so that the rotational motion of the power motor 51 is converted into the linear motion of the drive motor 50. For ease of installation, a connecting sleeve 60 is provided on the drive motor 50. The connecting sleeve 60 is sleeved on the lead screw 55 and is fixedly connected to the transmission component 54 and the drive motor 50 respectively, so as to drive the drive motor 50 to move up and down.

[0054] Since the heating tube 20, the upper electrode plate 30, and the lower electrode plate 31 are all located within the same cavity 11, and the upper electrode plate 30 can move up and down and rotate. Preferably, the heating tube 20 is located on one side of the upper electrode plate 30 within the cavity 11, and the horizontal projections of the heating tube 20 and the upper electrode plate 30 are staggered. This staggered arrangement allows the heating tube 20 and the upper electrode plate 30 to be rationally arranged within a limited space, avoiding mutual interference between them. This makes the internal structure of the oven more compact and orderly, which is conducive to miniaturization design. When the upper electrode plate 30 moves up and down or rotates, it will not physically collide with or obstruct the heating tube 20, ensuring the freedom and flexibility of the upper electrode plate 30's movement. It also minimizes the possibility that the heat from the heating tube 20 will be blocked by the upper electrode plate 30 or the lower electrode plate 31, thus affecting the heating effect, and minimizes the possibility that the electric field between the upper electrode plate 30 and the lower electrode plate 31 will be disrupted by the heating tube 20, thus affecting the defrosting effect.

[0055] During baking mode, the temperature inside the baking cavity 110 rises to a high level. If the telescopic device and drive motor 50 are directly exposed to such a high-temperature environment, their internal electronic components and mechanical structures are easily damaged due to overheating. Therefore, in this application, a heat insulation plate 112 is provided inside the cavity 11, dividing the cavity 11 into a baking cavity 110 and a heat insulation cavity 111. The telescopic device and drive motor 50 are located inside the heat insulation cavity 111, making the internal structural layout more compact and orderly. This allows them to operate in a relatively lower temperature environment, effectively protecting the telescopic device and drive motor 50 from the high temperature of the baking cavity 110, reducing the risk of electrical failures, ensuring stable performance, and extending service life. The heat insulation plate 112 also provides some sound insulation, reducing the noise generated by the drive motor 50 during operation from being transmitted into the baking cavity 110, providing a quieter cooking environment for the user. The heat insulation plate 112 also prevents food splatter from contacting the drive motor 50 and telescopic device, further ensuring stable operation and cleaner operation of the drive motor 50 and telescopic device.

[0056] It should be noted that the heat insulation plate 112 is provided with a clearance hole 113 to avoid the output end of the drive motor 50 and the power line 34.

[0057] Since the rotation of the upper electrode plate 30 causes the power cord 34 to rotate as well, the power cord 34 is prone to tangling. Therefore, in this application, the upper electrode plate 30 is provided with a terminal 301, and the peripheral surface of the terminal 301 is provided with a conductive ring groove 302. The power cord 34 is connected to a conductive ring 35, which is fitted inside the conductive ring groove 302. The surface of the conductive ring 35 is in contact with the groove wall of the conductive ring groove 302 and can rotate relative to it. When the upper electrode plate 30 rotates, the power cord 34 is prevented from twisting or tangling as much as possible, thus protecting the power cord 34 from physical damage and ensuring the stability and safety of power transmission.

[0058] When the upper electrode plate 30 moves upward or rotates, the power cord 34 may extend and hang haphazardly, posing a risk of entanglement and damage to other objects. Therefore, in this application, the housing 10 is provided with a through hole 12 for the power cord 34 to pass through and a storage cavity 13 communicating with the through hole 12. This prevents the power cord 34 from hanging haphazardly outside the oven, resulting in a cleaner overall appearance. The storage cavity 13 is equipped with a winding roller 40 for winding the power cord 34 and a torsion spring 41 for resetting the winding roller 40. The winding roller 40 is rotatably connected to the storage cavity 13 via the torsion spring 41, ensuring that the power cord 34 between the power module 32 and the upper electrode plate 30 remains taut, preventing it from being scattered inside the oven and minimizing the risk of tangling or knotting during use, thus maintaining a cleaner overall appearance for the oven.

[0059] When in use, the preset temperature can be 0℃. When the temperature sensor 33 detects that the temperature of the food is higher than 0℃, the baking module will be started directly for baking. The position and angle of the upper electrode plate 30 will not change and it will not be started.

[0060] like Figures 1 to 4 As shown, when the temperature sensor 33 detects that the food temperature is below 0°C, and the thickness sensor 36 detects that the food thickness is relatively thick, the power motor 51 starts first to drive the upper electrode plate 30 to rise to a suitable position, and then the defrosting mode is activated. For easy differentiation, the upper electrode plate 30 is at the first height at this time. Simultaneously, as... Figures 5 to 7 As shown, the drive motor 50 drives the upper electrode plate 30 to rotate. When the temperature sensor 33 detects that the temperature of the food has reached 0℃, the control center controls the oven to start the baking mode and turn off the defrosting mode.

[0061] like Figure 8 and Figure 9As shown, when the temperature sensor 33 detects that the temperature of the food is below 0°C, and the thickness sensor 36 detects that the thickness of the food is too thin, the power motor 51 starts first to drive the upper electrode plate 30 to descend to a suitable position, and then the defrosting mode is started. For easy distinction, the upper electrode plate 30 is at the second height at this time. At the same time, the drive motor 50 drives the upper electrode plate 30 to rotate. When the temperature sensor 33 detects that the temperature of the food reaches 0°C, the control center controls the oven to start the baking mode and turn off the defrosting mode.

[0062] It should be noted that after the temperature sensor 33 detects that the food temperature has reached 0℃, the oven may only turn off the defrost mode without directly starting the baking mode, and is only used for defrosting the food. Also, the preset temperature in this application can also be -1℃, 1℃, or similar values.

[0063] It should be noted that the temperature sensor 33, thickness sensor 36, and power module 32 in this application are all concealed, effectively avoiding direct contact with food. The temperature sensor 33 can be an infrared thermometer based on the principle of thermal radiation. An infrared thermometer includes a light system and an infrared detector. The optical system in the infrared thermometer collects the infrared radiation emitted by the food and focuses it onto the infrared detector. The infrared detector converts the infrared radiation into an electrical signal. The magnitude of the electrical signal is proportional to the intensity of the received infrared radiation. By processing and converting the electrical signal, the temperature of the food can be calculated. Understandably, in other embodiments, the temperature sensor can be a colorimetric thermometer. Colorimetric thermometers typically measure the radiation intensity of food at two different wavelengths. By calculating the ratio of the radiation intensities at these two wavelengths, the temperature of the food can be determined. Because the ratio of the radiation intensities of food at these two wavelengths is different at different temperatures, the temperature of the food can be deduced from this characteristic.

[0064] The thickness sensor 36 includes a camera and an image processing system. The camera is set on the side wall of the cavity 11 to take pictures of the food. The image processing system analyzes the food image, measures the pixel height of the food in the image, and then calculates the actual thickness of the food based on the pre-calibrated conversion relationship between pixels and actual size.

[0065] Understandably, in other embodiments, the housing is also provided with a distance sensor located above the lower electrode plate. The food is placed on the lower electrode plate, and the distance sensor is used to detect the distance between the upper surface of the food on the lower electrode plate and the distance sensor. The control center obtains the thickness of the food based on the detection value of the distance sensor.

[0066] Specifically, the distance sensor can be a laser ranging thickness sensor. Utilizing the reflective properties of laser light, the laser ranging thickness sensor emits a laser beam. After the laser beam hits the food surface, it reflects back. The laser ranging thickness sensor calculates the distance between the sensor and the upper surface of the food by measuring the time difference between laser emission and reception, combined with the laser's propagation speed in air. The lower surface of the food is placed on a lower electrode plate with a fixed height. The distance from the distance sensor to the lower electrode plate is also fixed. Only the distance between the upper surface of the food and the distance sensor needs to be measured. The control center calculates the difference between the distance between the lower electrode plate and the distance sensor and the detected distance to determine the food thickness. Alternatively, in other embodiments, the distance sensor can be an ultrasonic thickness sensor. The ultrasonic thickness sensor emits ultrasonic waves. These waves propagate through the air to the food surface, and a portion is reflected back. The ultrasonic thickness sensor receives the reflected waves. Based on the propagation speed of the ultrasonic waves and the time interval between emission and reception, the distance from the ultrasonic thickness sensor to the food surface is calculated. Similarly, the lower surface of the food is placed on the lower electrode plate, the height of which is fixed, and the distance from the distance sensor to the lower electrode plate is also fixed. Only the distance between the upper surface of the food and the distance sensor needs to be measured. Therefore, an ultrasonic distance sensor is placed above the food, and ultrasonic waves are emitted towards it. By detecting the time it takes for the ultrasonic waves to travel from emission to reception, the distance between the upper surface of the food and the ultrasonic distance sensor can be calculated. The control center then calculates the difference between the distance between the lower electrode plate and the distance sensor and the detected distance to determine the thickness of the food.

[0067] Understandably, in other embodiments, a quality detector may also be provided to detect the weight of the food in order to control the thawing time.

[0068] Understandably, in other embodiments, the heating tube is located on one side of the lower electrode plate inside the cavity, and the horizontal projection of the heating tube and the horizontal projection of the lower electrode plate are staggered to avoid mutual interference between the two, making the internal structure of the oven more compact and orderly.

[0069] Understandably, in other embodiments, the heating element may also be located on one side of the upper electrode plate and one side of the lower electrode plate inside the cavity, so as to heat the food from both sides and make the heating more uniform.

[0070] Understandably, in other embodiments, the heating tubes are positioned offset from the positions of the upper and lower electrode plates within the cavity, respectively, to avoid mutual interference and make the internal structure of the oven more compact and orderly, and the installation positions easier to distinguish. Specifically, the upper electrode plate is located at the top of the cavity, the lower electrode plate at the bottom of the cavity, and the heating tubes are located on the front and rear sides of the cavity.

[0071] Understandably, in other embodiments, the surface of the upper electrode plate facing the lower electrode plate is provided with a needle-like structure. The needle-like structure can effectively focus the electric field. The high electric field intensity region generated by the needle-like structure can quickly break the ice crystal structure on and near the surface of the food, accelerate the melting process of the ice crystals, and reduce the time required for thawing.

[0072] Understandably, in other embodiments, the heat insulation plate is movable within the cavity, while the upper electrode plate and the heat insulation plate are fixedly connected. The heat insulation plate moves together with the upper electrode plate during its lifting and rotating movements, minimizing the exposure of the power cable connected to the upper electrode plate to the high-temperature baking cavity and ensuring the lifespan of the power cable. The cavity is cylindrical, and the heat insulation plate is circular, preventing interference between the heat insulation plate and the inner wall of the cavity during rotation. This also ensures that the heat insulation plate always maintains a close distance from the inner wall of the cavity, effectively preventing heat from the baking cavity from entering the heat insulation cavity.

[0073] Example 2:

[0074] like Figure 10 and Figure 11 As shown, in this embodiment, the upper electrode plate 30 is provided with a terminal 301 fixedly connected to the power cord 34. The upper electrode plate 30 can rotate forward and backward, and the forward and reverse rotation of the upper electrode plate 30 alternates cyclically. During the freezing process, ice crystals inside food usually grow along a certain direction, and the unidirectional electric field may not be able to completely destroy these ice crystal structures during thawing. The forward and reverse rotation cycle of the upper electrode plate 30 makes the direction of the electric field constantly change, which can more effectively destroy the lattice structure of the ice crystals and accelerate the melting process of the ice crystals. From a microscopic point of view, it is like destroying the ice crystals from different directions, making the ice crystals disintegrate faster. This method can significantly shorten the thawing time and improve the working efficiency of the oven in the thawing mode. Through the alternating cycle of forward and reverse rotation, even if the upper electrode plate 30 rotates frequently, the excessive twisting or tangling of the power cord 34 can be avoided as much as possible. This reduces the risk of damage to the power cord 34 due to twisting and ensures the stability and long-term reliability of power transmission.

[0075] It should be noted that the upper electrode plate 30 can rotate a full circle clockwise and then a full circle counterclockwise. Alternatively, it can rotate half a circle clockwise and then half a circle counterclockwise. This alternating rotation helps to break the directionality of ice crystals inside the food.

[0076] Other content not described in this embodiment can be referred to in the above embodiments.

[0077] Example 3:

[0078] like Figure 12 and Figure 13As shown, since users place food in different ways, the upper electrode plate 30 may not effectively cover the food. Therefore, in this embodiment, the upper electrode plate 30 can also move horizontally back and forth and horizontally left and right relative to the lower electrode plate 31. Specifically, the oven also has a horizontal drive and a vertical drive located on the horizontal drive. The horizontal drive drives the vertical drive to move left and right, and the output end of the vertical drive is fixedly connected to the upper electrode plate 30 to drive the upper electrode plate 30 to move back and forth. This allows the electric field between the upper electrode plate 30 and the lower electrode plate 31 to cover a wider area within the cavity 11. For example, when a user puts a large piece of frozen roast meat placed on one side of the cavity 11 into the oven, by moving the upper electrode plate 30 horizontally, it can be ensured that the electric field can completely cover all parts of the roast meat, thereby avoiding dead areas that the electric field cannot reach, and ensuring that the entire roast meat is thawed as evenly as possible. The position of the upper electrode plate 30 can also be dynamically adjusted according to the specific thawing progress and needs of the food. If it is found that one side of the food is thawing more slowly, the upper electrode plate 30 can be moved to that side to concentrate the electric field and accelerate the thawing of that side.

[0079] Specifically, the transverse actuator includes a first slide rail 56 arranged horizontally on the cavity 11 and a first drive slider 57 disposed within the first slide rail 56. The longitudinal actuator includes a second slide rail 58 arranged front to back. The second slide rail 58 is disposed on the first drive slider 57. The upper electrode plate 30 is disposed on the second slide rail 58 via the second drive slider 59. The first drive slider 57 moves left and right along the first slide rail 56, which can drive the second slide rail 58 to move left and right, thereby realizing the left and right movement of the upper electrode plate 30. The second drive slider 59 moves along the second slide rail 58, which can drive the upper electrode plate 30 to move back and forth.

[0080] It should be noted that the first slide rail 56, the first drive slider 57, and the second slide rail 58 are all located above the heat insulation plate 112. The heat insulation plate 112 is provided with a clearance strip hole 114 to avoid the second drive slider 59, so that the first slide rail 56, the first drive slider 57, and the second slide rail 58 are in the heat insulation cavity 111 with a lower temperature.

[0081] It should be noted that the first drive slider 57 and the second drive slider 59 slide under the action of electromagnetic drive, mainly through a linear motor drive. In linear motor drive, the linear motor consists of a stator and a mover. When three-phase alternating current is applied to the stator windings, a traveling wave magnetic field is generated. The mover is subjected to this magnetic field, generating electromagnetic force and moving in a straight line. The first drive slider 57 and the second drive slider 59 are fixedly connected to the mover, and the first slide rail 56 and the second slide rail 58 define the movement trajectory of the mover. Therefore, the first drive slider 57 and the second drive slider 59 slide smoothly within the first slide rail 56 and the second slide rail 58 along with the mover.

[0082] Other content not described in this embodiment can be referred to in the above embodiments.

[0083] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. An oven, comprising a shell and a cavity disposed within the shell, wherein a heating element is provided within the cavity, characterized in that, The oven also includes a control center, an upper electrode plate, a lower electrode plate, a power module, and a temperature sensor. The upper and lower electrode plates are located inside the cavity and are connected to the power module via power lines. The oven includes a baking mode with the heating element operating and a defrosting mode where the upper electrode plate operates and a high-voltage electric field is formed between the lower electrode plate. The temperature sensor is used to acquire the temperature of the food inside the cavity and convert it into an electrical signal, which is then transmitted to the control center. When the control center determines that the food temperature detected by the temperature sensor is lower than a preset temperature, it controls the oven to enter the defrosting mode. When the control center determines that the food temperature detected by the temperature sensor is not lower than the preset temperature, it controls the oven to enter the baking mode.

2. The oven according to claim 1, characterized in that, The upper electrode plate can move up and down relative to the lower electrode plate, and the upper electrode plate can rotate around the line connecting the center of the upper electrode plate and the center of the lower electrode plate.

3. The oven according to claim 2, characterized in that, The upper electrode plate is provided with a terminal, and the peripheral surface of the terminal is provided with a conductive ring groove. The power line is connected to a conductive ring, which is sleeved in the conductive ring groove. The surface of the conductive ring is in contact with the groove wall of the conductive ring groove and can rotate relative to it.

4. The oven according to claim 2, characterized in that, The upper electrode plate is provided with a terminal that is fixedly connected to the power cord. The upper electrode plate can rotate forward and backward, and the forward and reverse rotation of the upper electrode plate alternates in a cycle.

5. The oven according to claim 2, characterized in that, The housing is provided with a through hole for the power cord to pass through and a storage cavity communicating with the through hole. The storage cavity is provided with a winding roller for winding the power cord and a torsion spring for driving the winding roller to return to its original rotation. The winding roller is rotatably connected to the storage cavity through the torsion spring so that the power cord between the power module and the upper electrode plate is kept taut.

6. The oven according to claim 2, characterized in that, The housing is also provided with a thickness sensor for detecting the thickness of the food inside the cavity to control the amount of vertical movement of the upper electrode plate relative to the lower electrode plate; or, the housing is also provided with a distance sensor located above the lower electrode plate, the food is placed on the lower electrode plate, the distance sensor is used to detect the distance between the upper surface of the food on the lower electrode plate and the distance sensor, and the control center obtains the thickness of the food based on the detection value of the distance sensor.

7. The oven according to claim 2, characterized in that, The cavity is equipped with a telescopic device and a drive motor located at the output end of the telescopic device. The telescopic device drives the drive motor to move up and down. The output end of the drive motor is fixedly connected to the upper electrode plate to drive the upper electrode plate to rotate.

8. The oven according to claim 7, characterized in that, The cavity is equipped with a heat insulation plate that divides the cavity into a baking cavity and a heat insulation cavity, and the telescopic device and the drive motor are located inside the heat insulation cavity.

9. The oven according to claim 1, characterized in that, The oven is also equipped with a horizontal drive and a vertical drive located on the horizontal drive. The horizontal drive drives the vertical drive to move left and right. The output end of the vertical drive is fixedly connected to the upper electrode plate to drive the upper electrode plate to move back and forth.

10. The oven according to claim 1, characterized in that, The surface of the upper electrode plate facing the lower electrode plate is provided with a pointed structure or a needle-like structure.

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