Multifunctional cooking equipment

Abstract

The invention relates to the technical field of kitchen equipment, in particular to multifunctional cooking equipment which comprises a machine head, a base, a transparent pot placed on the base and a supporting arm used for connecting the machine head with the base, the machine head is buckled on the transparent pot to form a cooking cavity, and a hot air circulation assembly is arranged in the machine head. A cooling fan and a cooling air duct communicated with the cooling fan are arranged in the base, and an air outlet of the cooling air duct faces the outer wall of the transparent pot body; the device further comprises a control unit, and the control unit is configured to control the cooling fan to be started when it is detected that water mist exists on the inner wall of the transparent pot body, air blown out of the cooling fan is cooled through the refrigeration piece and then blown to the transparent pot body through the cooling air channel to conduct intermittent demisting on the transparent pot body, and the inner wall of the transparent pot body is kept clear and transparent all the time; and the visualization performance of the transparent pot body is greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of kitchen equipment, and in particular to a multifunctional cooking device. Background Technology

[0002] Currently, in order to improve the user experience and make the cooking process more visible, some air fryers have begun to use glass pots instead of traditional metal pots. This transparent pot design meets the user's need to observe the state of the food.

[0003] Existing patent CN215650642U discloses an air fryer bucket structure, including: an air frying assembly, comprising a support assembly and an air frying module connected to the support assembly, with at least one receiving station between the support assembly and the air frying module; and a transparent pot body, detachably connected to the receiving station. This application provides a transparent pot body between the support assembly and the air frying module, allowing the user to see the cooking level of the food inside the transparent pot body while the air frying module heats it, thus enabling them to adjust the cooking temperature to suit different levels.

[0004] During food cooking, especially when cooking ingredients with high moisture content, the moisture inside the ingredients evaporates rapidly, forming a large amount of high-temperature steam inside the pot. When this steam comes into contact with the relatively cool inner wall of the transparent glass, it quickly condenses into water droplets or forms a uniform layer of water mist, adhering to the inner wall of the transparent pot and severely affecting the visibility of the cooking process. Furthermore, the internal space of the transparent pot is constantly in an environment of high temperature, high humidity, and hot oil splattering, which puts a huge strain on the strength and thermal shock resistance of the glass material itself. The high temperature and high humidity environment also accelerates the aging and corrosion of internal electronic components and metal parts, thereby reducing the overall service life and reliability. Summary of the Invention

[0005] To effectively solve the above problems, this application provides a multifunctional cooking device.

[0006] This application provides a multifunctional cooking device, which adopts the following technical solution: A multifunctional cooking device includes a head unit, a base, a transparent pot body placed on the base, and a support arm for connecting the head unit and the base. The head unit is fastened to the transparent pot body to form a cooking cavity, and a hot air circulation assembly is provided inside the head unit. The base is provided with a cooling fan and a cooling duct communicating with the cooling fan. The air outlet of the cooling duct faces the outer wall of the transparent pot body. The device also includes a cooling plate located on the air outlet or air inlet path of the cooling fan. The device also includes a control unit, which is configured to: when water mist is detected on the inner wall of the transparent pot body, control the cooling fan to turn on, and the air blown out by the cooling fan is cooled by the cooling plate and then blown onto the transparent pot body through the cooling duct to intermittently defog it.

[0007] Optionally, the cooling chip is disposed within the base and above the cooling fan, with the cold end face of the cooling chip facing the cooling fan; or, the cooling chip is arranged in a ring and disposed outside the cooling fan.

[0008] Optionally, the air outlet of the cooling air duct is arranged around the side wall of the transparent pot body.

[0009] Optionally, the cooling element is disposed on the support arm with the cold end face of the cooling element facing the rear side of the transparent pot body; or, the cooling element is disposed on the rear side of the transparent pot body with the cold end face of the cooling element facing the support arm; or, the cooling element is disposed on one side of the cooling fan.

[0010] Optionally, the air outlet of the cooling duct is located on the side near the base and the support arm.

[0011] Optionally, the control unit is further configured to: when cooking is completed or the cooking time is less than a preset time threshold, control the cooling fan to turn on, and the cold air blown out by the cooling fan is cooled by the cooling plate and then blown to the transparent pot body through the cooling air duct to cool it down.

[0012] Optionally, a heat-conducting element is provided between the hot end face of the cooling chip and the bottom of the transparent pot body, so that the heat-conducting element transfers heat to the bottom of the transparent pot body; or, a heat-conducting element is provided on the rear side of the transparent pot body, with the hot end face of the cooling chip facing the heat-conducting element, so that the heat-conducting element transfers heat to the side wall of the transparent pot body.

[0013] Optionally, the base is provided with a separator that divides the cooling air duct into a first air duct and a second air duct. The air outlet of the cooling air duct includes a first air outlet connected to the first air duct and a second air outlet connected to the second air duct. The air outlets of the first and second air outlets are inclined upwards and have different inclination angles.

[0014] Optionally, the tilt angle of the first air outlet is 75°-80°, and the tilt angle of the second air outlet is 76°-83°.

[0015] Optionally, the airflow direction of the first air outlet extends to the top of the transparent pot body, and the intersection of the airflow direction extension line of the second air outlet and the transparent pot body is located at 1 / 3-3 / 4 of the height of the transparent pot body.

[0016] In summary, this application has at least the following beneficial effects: 1. When water vapor is detected on the inner wall of the transparent pot, the cooling fan and cooling plate are turned on. Through the synergistic effect of the cooling fan and cooling plate, the cooling air is directed to the outer wall of the transparent pot, thereby rapidly reducing the surface temperature of the transparent pot. When the temperature of the inner wall of the transparent pot is forcibly reduced to a level close to or even lower than the temperature of the air inside the transparent pot, the original huge temperature difference is reduced or eliminated. Since the surface temperature of the inner wall of the transparent pot is no longer significantly lower than the dew point temperature of the air inside the transparent pot, a large amount of water vapor in the cooking cavity is forced to condense into water droplets and drip before contacting the inner wall of the transparent pot, or significantly reduce the amount of water vapor adhering to the inner wall of the transparent pot. At the same time, the heat radiation of the food inside the transparent pot and the circulating hot air will provide enough heat to make the formed water droplets evaporate and dissipate quickly, always maintaining the clear transparency of the inner wall of the transparent pot, greatly improving the visibility performance of the transparent pot. Transparent pots are prone to cracking due to uneven thermal stress when subjected to rapid heating and cooling. This solution uses intermittent, blowing-type cooling instead of sudden cooling, which is a relatively gentle way to lower the temperature. This avoids extreme temperature changes caused by users rinsing the pot with cold water immediately after cooking, effectively reducing the risk of damage to the glass pot due to improper handling. At the same time, the cooling air also helps the transparent pot dissipate heat evenly, reducing localized thermal stress concentration and further improving safety in use. The continuous cooling airflow not only blows onto the transparent pot body, but also creates negative pressure and airflow inside the base. This airflow can effectively remove the heat and moisture accumulated around the electronic components inside the base, effectively reducing the working environment temperature inside the base, greatly delaying the aging of electronic components, the decline in insulation performance and the corrosion of metal contacts, and improving the reliability and safety of the whole machine.

[0017] 2. The cooling element is installed inside the base and located above the cooling fan. The cold end face of the cooling element faces the cooling fan. The cooling fan draws in external airflow from below the base and blows the airflow upward to the cold end face of the cooling element, so that the drawn-in air and the cold end face of the cooling element can fully exchange heat and be cooled instantly. The cooling airflow is then blown to the outer wall of the transparent pot through the cooling air duct, ensuring that the cold air blown to the transparent pot has a low temperature and strong defogging potential.

[0018] 3. The air outlets of the cooling air duct are arranged around the side wall of the transparent pot body, that is, several air outlets are evenly distributed along the edge of the bottom plate. The surrounding air outlets ensure that the cooling airflow is evenly distributed to the entire side wall of the transparent pot body, so that the transparent pot body cools down synchronously and evenly. This avoids huge temperature differences between local and overall areas or between different regions. Compared with single-point air outlets, it has a faster defogging speed and a more thorough effect, and can quickly restore the transparency of the transparent pot body to meet the user's visibility needs.

[0019] 4. The cooling element is located on the rear side of the transparent pot body, with the cold end face of the cooling element facing the support arm. The air outlet of its cooling air duct is located on the side near the base and the support arm, so that the air blown by the cooling fan can be blown to the rear side of the transparent pot body through the cooling air duct and flow through the cold end face of the cooling element to generate a cooling airflow. The cooling airflow blown from the rear side will naturally wrap around to both sides due to the wall adhesion effect, and can still effectively cover the side wall of the transparent pot body to achieve effective cooling. At the same time, it can also provide a low temperature environment for the inside of the support arm and its possible cables, which can prevent the temperature inside the support arm from becoming too high due to long-term radiation heat from the transparent pot body, effectively delaying the aging process of the internal cable insulation layer and improving the long-term reliability of the equipment. The cooling element is mounted on the support arm with its cold end facing the rear of the transparent pot. This allows the air blown out by the cooling fan to pass through the cooling duct into the cold air gap and flow through the cold end of the cooling element to generate a cooling airflow. The cooling airflow blown out from the rear will naturally wrap around both sides due to the wall adhesion effect, effectively covering the side walls of the transparent pot and achieving effective cooling.

[0020] 5. The control unit is also configured to: when cooking is completed or the cooking time is less than the preset time threshold, control the cooling fan and the cooling plate to turn on. The cooling fan blows the cold air generated by the cooling plate through the surrounding cooling air duct to the high-temperature transparent pot body. Through forced convection heat exchange, the temperature of the outer surface of the transparent pot body is quickly and actively reduced, which avoids the risk of burns caused by contact with the high-temperature transparent pot body from the root, and greatly improves the overall safety and user experience. Furthermore, when cooking is complete or the cooking time is less than the preset time threshold, the heating element has stopped working, but the food is still at a high temperature. At this time, the heat generated by the hot end of the cooling element is transferred to the bottom of the transparent pot body to keep the food warm for a short time, preventing the food from cooling down quickly due to the rapid cooling of the pot body. This improves the taste of the food and converts the waste heat generated by the cooling into useful heat energy for heat preservation, thus improving the energy utilization efficiency of the entire system.

[0021] 6. A heat-conducting component is installed between the hot end of the cooling element and the bottom of the transparent pot body. The heat-conducting component directionally transfers the large amount of waste heat generated by the hot end of the cooling element to the bottom of the transparent pot body. In active cooling mode, although the hot air circulation component has stopped working, the food is still at a high temperature. This recovered waste heat can be used to keep the transparent pot body warm for a short time, slowing down the cooling rate of the food. This achieves efficient cooling while better maintaining the optimal cooking temperature of the food, thus improving the cooking experience. In defogging mode, the large amount of waste heat generated by the hot end of the cooling element can assist in heating the food inside the transparent pot body, significantly improving energy utilization efficiency. The transparent pot body's large heat capacity and continuous air convection can continuously absorb and remove the heat transferred from the heat-conducting components, thereby ensuring that the hot end face of the cooling element is always maintained at a relatively low operating temperature, guaranteeing the cooling performance of the cooling element, greatly extending its service life, and improving overall reliability.

[0022] 7. The base is equipped with a separator that divides the cooling airflow into a first airflow channel and a second airflow channel. The first airflow channel is located outside the second airflow channel, meaning that the cooling airflow is divided into inner and outer layers as it flows outward from the center of the base. The second air outlet of the second airflow channel is closer to the bottom center area of ​​the transparent pot. Due to its upward tilt, the airflow mainly covers the outer wall of the lower middle part of the transparent pot. The first air outlet of the first airflow channel, due to its different tilt angle, mainly covers the outer wall of the upper middle part, i.e., the top, of the transparent pot. These two airflows, originating from different radial positions and blowing towards the outer wall of the transparent pot at different angles, together form a three-dimensional cooling air curtain that tightly wraps the transparent pot from bottom to top. This eliminates the cooling blind spots that may exist in a single airflow channel, ensuring that every height area of ​​the transparent pot receives direct and effective cooling airflow coverage, achieving rapid and uniform cooling, and thus efficiently defogging and cooling. Furthermore, the two airflows will inevitably converge, collide, and mix in a specific area on the outer wall of the transparent pot, which will greatly disrupt the static air boundary layer on the surface of the outer wall of the transparent pot and generate strong turbulence. This will efficiently mix and carry away the high-temperature hot air and cooling airflow that are close to the outer wall of the transparent pot, while allowing the new low-temperature cooling air to directly contact the transparent pot, greatly improving the heat exchange efficiency.

[0023] 8. The tilt angle of the first air outlet is 75°-80°, ensuring that the cooling airflow has a sufficiently large vertical velocity component to overcome gravity and air resistance, reaching the highest edge area of ​​the pot body and ensuring that the entire transparent pot body is covered by cooling air from top to bottom. If the angle is too small, the airflow will dissipate horizontally too early before reaching the top, resulting in insufficient cooling at the top of the transparent pot body and creating a defogging blind spot; if the angle is 90° vertically upward, the airflow will rush straight upward and can only impact a very small area of ​​the outer wall of the transparent pot body, failing to spread out well to cover the curved surface of the side wall of the transparent pot body; The second air outlet has an inclination angle of 76°-83°, and its airflow has an extremely strong vertical velocity. It can directly and at high speed impact the lower outer wall of the transparent pot. This frontal impact can most effectively break the high-temperature air boundary layer in this area, achieve the highest heat exchange efficiency, and quickly reduce the temperature of the transparent pot in the area where the food is located.

[0024] 9. The airflow direction of the first air outlet extends to the top of the transparent pot body, and the intersection of the airflow direction extension line of the second air outlet with the transparent pot body is located at 1 / 3-3 / 4 of the height of the transparent pot body. This allows the airflow from the first air outlet to cover the lower middle part, and the airflow from the second air outlet to cover the upper middle part to the top. The two are connected end to end in space and closely overlap, achieving full coverage of the side wall of the transparent pot body without dead angles. This ensures that the entire transparent pot body can cool down synchronously and evenly, and can quickly remove fog and actively cool. The top edge of the transparent pot body is the top of the cooking cavity, where most of the rising water vapor gathers and is prone to fogging. By guiding the cooling airflow from the first air outlet to the top of the transparent pot body, the rising water vapor is cooled down before it comes into contact with the top of the transparent pot body, or it cannot be stably condensed on the already cooled top wall, thus eliminating the fogging blind spot at the top and ensuring a clear view. The lower middle part of the transparent pot body is the core area where food accumulates during cooking, and it is also the main area where hot air from the heating element blows directly. Therefore, it is the area with the highest temperature and the most concentrated heat. Precisely guiding the cooling airflow from the second air outlet to this area can reduce the temperature of the main heat source area of ​​the transparent pot body most quickly and effectively, and improve the defogging efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the cooking device shown in Embodiment 1 of this application.

[0026] Figure 2 This is a schematic diagram of the air circulation in the cooking device shown in Embodiment 1 of this application.

[0027] Figure 3 This is a cross-sectional view of the cooking apparatus shown in Embodiment 2 of this application.

[0028] Figure 4 This is a schematic diagram of the structure of the cooking device shown in Embodiment 4 of this application.

[0029] Figure 5 This is a schematic diagram of the base structure shown in Embodiment 4 of this application.

[0030] Figure 6 This is a schematic diagram of the structure of the cooking device shown in Embodiment 5 of this application.

[0031] Figure 7 This is another structural schematic diagram of the cooking device shown in Embodiment 5 of this application.

[0032] Figure 8 This is a schematic diagram of the structure of the cooking device shown in Embodiment 6 of this application.

[0033] Figure 9 This is a schematic diagram of the structure of the cooking device shown in Embodiment 7 of this application.

[0034] Figure 10 This is a schematic diagram of the structure of the cooking device shown in Embodiment 8 of this application.

[0035] Figure 11 This is a schematic diagram of the structure of the cooking device shown in Embodiment 9 of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Head unit; 11. Hot air circulation assembly; 111. Heating element; 112. First fan; 113. Drive motor; 2. Base; 21. Bottom shell; 22. Base plate; 23. Cooling fan; 24. Cooling duct; 241. First duct; 242. Second duct; 243. First air outlet; 244. Second air outlet; 25. Cooling element; 27. Separator; 28. Guide wall; 29. ​​Receptacle; 291. Interlayer cavity; 3. Transparent pot body; 31. Handle; 32. Heat insulation sleeve; 4. Support arm; 41. Cold air gap. Detailed Implementation

[0037] The present application will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are merely specific illustrations of the present application, and their purpose is to enable those skilled in the art to better understand the technical solutions of the present application, and should not be regarded as limitations on the present application.

[0038] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and 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 of this application.

[0039] Example 1: This application discloses a multifunctional cooking device, such as... Figure 1 and Figure 2 As shown, the device includes a head 1, a base 2, a transparent pot body 3 placed on the base 2, and a support arm 4 for connecting the head 1 and the base 2. The support arm 4 is located on the rear side of the transparent pot body 3. The head 1 and the support arm 4 are rotatably connected. The head 1 is fastened to the transparent pot body 3 to form a cooking cavity. A hot air circulation assembly 11 is provided inside the head 1. The hot air circulation assembly 11 includes a heating element 111, a first fan 112, and a drive motor 113 that drives the first fan 112 to rotate. The heating element 111 heats the food, and the first fan 112 rotates under the drive of the drive motor 113, blowing the heat generated by the heating element 111 into the transparent pot body 3 to heat the food.

[0040] The transparent pot body 3 is equipped with a handle 31, and a heat insulation sleeve 32 is fitted on the handle 31 to physically insulate heat. Even if the user accidentally touches the handle 31 during cooking, they can avoid being burned.

[0041] In this embodiment, the base 2 includes an upward-opening bottom shell 21 and a bottom plate 22 covering the port of the bottom shell 21. A receiving cavity 29 is formed between the bottom shell 21 and the bottom plate 22. A cooling fan 23 and a cooling air duct 24 communicating with the cooling fan 23 are provided in the receiving cavity 29. The air outlet of the cooling air duct 24 faces the outer wall of the transparent pot body 3.

[0042] Among them, combined Figure 2 The support arm 4 extends upward from the bottom shell 21, improving the connection stability between the support arm 4 and the base 2. The support arm 4 includes an outer wall and an inner wall, which together form a sandwich cavity 291, which is connected to the receiving cavity 29. An air inlet communicating with the sandwich cavity 291 is provided on the outer wall of the support arm 4 at the bottom, so that the cooling fan 23 can draw the cold air from the outside of the support arm 4 into the sandwich cavity 291 and the receiving cavity 29 through the air inlet, and blow it onto the outer wall of the transparent pot body 3 through the air outlet of the cooling air duct 24, thereby cooling the outer surface of the transparent pot body 3.

[0043] It should be noted that the support arm 4 can isolate the heat generated by the transparent pot body 3, so that the air temperature outside the support arm 4 is significantly lower than the temperature of other sides of the transparent pot body, ensuring that the cold air blown towards the transparent pot body 3 has a low temperature and strong defogging potential.

[0044] In other embodiments, the air inlet is provided on the bottom wall of the bottom shell 21, and a support block is provided at the bottom of the bottom shell 21 so that external cold air enters the cooling air duct 24 through the air inlet.

[0045] The air outlets of the cooling air duct 24 are arranged around the side wall of the transparent pot body 3, that is, several air outlets are evenly distributed at the edge of the bottom plate 22. The surrounding air outlets ensure that the cooling airflow is evenly distributed to the entire side wall of the transparent pot body 3, so that the transparent pot body 3 cools down synchronously and evenly as a whole, avoiding huge temperature differences between local and overall areas or between different areas. Compared with single-point air outlets, it has a faster defogging speed and a more thorough effect, and can quickly restore the transparency of the transparent pot body 3 to meet the user's visibility needs.

[0046] Example 2: The difference between this embodiment and the above embodiments is that: Figure 3 As shown, a cooling fan 23 and a cooling air duct 24 connected to the cooling fan 23 are provided inside the base 2. The air outlet of the cooling air duct 24 faces the outer wall of the transparent pot body 3, and the air inlet is provided on the bottom wall of the bottom shell 21. A support block is provided at the bottom of the bottom shell 21 so that external cold air enters the cooling air duct 24 through the air inlet.

[0047] The cooking equipment also includes a control unit and a cooling plate 25 for cooling the air in the cooling duct 24. The control unit is configured to turn on the cooling fan 23 and the cooling plate 25 when water mist is detected on the inner wall of the transparent pot body 3. The air blown out by the cooling fan 23 is cooled by the cooling plate 25 and then blown to the transparent pot body 3 through the cooling duct 24 to demist it intermittently.

[0048] Specifically, to prevent localized overcooling of the transparent pot body 3 and its impact on the heating effect of the food inside, the defogging mode employs a pulse-like "work-pause" cycle. For example, the cooling fan 23 and the cooling plate 25 work for 15 seconds and then stop for 5 seconds, repeating this cycle until the water mist is cleared, thus reducing the temperature of the transparent pot body 3 more evenly.

[0049] When water vapor is detected on the inner wall of the transparent pot 3, the cooling fan 23 and the cooling plate 25 are turned on. Through the synergistic effect of the cooling fan 23 and the cooling plate 25, the cooling air is directed to the outer wall of the transparent pot 3, thereby rapidly reducing the surface temperature of the transparent pot 3. When the temperature of the inner wall of the transparent pot 3 is forcibly reduced to a level close to or even lower than the temperature of the air inside the transparent pot 3, the original huge temperature difference is reduced or eliminated. Since the inner surface temperature of the transparent pot 3 is no longer significantly lower than the dew point temperature of the air inside the transparent pot 3, a large amount of water vapor in the cooking cavity is forced to condense into water droplets and drip before contacting the inner wall of the transparent pot 3, or significantly reduce the amount of water vapor adhering to the inner wall of the transparent pot 3. At the same time, the heat radiation of the food inside the transparent pot 3 and the circulating hot air will provide enough heat to make the formed water droplets evaporate and dissipate quickly, always maintaining the clear transparency of the inner wall of the transparent pot 3, greatly improving the visibility performance of the transparent pot 3.

[0050] The transparent pot body 3 is prone to cracking due to uneven thermal stress during rapid heating and cooling. This design uses intermittent, blowing-type cooling instead of sudden cooling, which is a relatively gentle cooling method. This avoids extreme temperature changes caused by users rinsing the pot body with cold water immediately after cooking, effectively reducing the risk of damage to the glass pot body due to improper handling. At the same time, the cooling air also helps the transparent pot body 3 dissipate heat evenly, reducing localized thermal stress concentration and further improving safety during use.

[0051] The continuous cooling airflow not only blows onto the transparent pot body 3, but also creates negative pressure and airflow inside the base 2. This airflow can effectively remove the heat and moisture accumulated around the electronic components inside the base 2, effectively reducing the working environment temperature inside the base 2, greatly delaying the aging of electronic components, the decline in insulation performance and the corrosion of metal contacts, and improving the reliability and safety factor of the whole machine.

[0052] It should be noted that a small camera is integrated inside the head unit 1, with its field of view directed at the inside of the transparent pot body 3. The control unit has a built-in image recognition algorithm. The camera captures images of the inside of the transparent pot body 3 at regular intervals. The image recognition algorithm preprocesses the captured images, such as noise reduction and color correction, and extracts key features from the preprocessed images. These features are highly correlated with the presence of water mist. If the features are identified as matching the water mist pattern, a signal is sent to the control unit to control the cooling fan 23 and the cooling plate 25 to start.

[0053] Water mist is essentially a semi-transparent white overlay on an image, which uniformly increases the brightness (grayscale value) of all pixels in the entire image, while compressing the original light and dark details of the image.

[0054] Specifically, after the camera periodically captures images of the interior of the transparent pot 3, it analyzes the grayscale distribution of the images. When there is no water vapor on the inner wall of the transparent pot 3, the image contains dark-colored food, brightly colored ingredients, and dark areas of the transparent pot 3 itself. These low-grayscale pixels lower the overall average value, which is at a medium level. When there is water vapor on the inner wall of the transparent pot 3, this layer of water vapor reduces the area of ​​low-grayscale pixels and significantly increases the area of ​​high-grayscale pixels, resulting in a significant increase in the average grayscale value. When the real-time calculated average grayscale value continuously exceeds the preset average grayscale threshold, water vapor condenses on the inner wall of the transparent pot 3.

[0055] Furthermore, it is necessary to analyze the dispersion of all pixel grayscale values ​​relative to the average value. Clear images exhibit distinct bright and dark areas, with a wide pixel distribution from dark to light, resulting in a larger standard deviation. In foggy images, the water vapor reduces the difference in brightness, causing pixel values ​​to concentrate in a narrower, higher-brightness range, thus lowering the image contrast and significantly reducing the standard deviation. When the real-time calculated standard deviation of the image continuously decreases and falls below the normal threshold, it indicates that water vapor is forming or has already formed on the inner wall of the transparent pot 3.

[0056] By combining the grayscale mean with the standard deviation, the degree of water mist generation can be accurately quantified, making the detection more reliable.

[0057] In other embodiments, the head unit 1 is equipped with several evenly distributed optical transmitters and receivers. The light emitted by the transmitters passes through the interior of the transparent pot 3 and is received by the receivers. Under normal circumstances, the light intensity signal is stable; when water mist is generated, the light is scattered, and the light intensity signal received by the receiver weakens. When the light intensity signal is lower than a set threshold, the defogging procedure is triggered.

[0058] The cooling element 25 can be set as a semiconductor cooling element 25. The semiconductor cooling element 25 has no moving parts and can start cooling instantly when powered on. The cooling airflow is formed instantly, and the water mist on the inner wall of the transparent pot body 3 quickly dissipates the moment the defogging mode is turned on, with an extremely fast response speed.

[0059] It should be noted that, in combination Figure 3 The cooling plate 25 is disposed in the accommodating cavity 29 and installed above the cooling fan 23. The cold end face of the cooling plate 25 faces the cooling fan 23. After the cooling fan 23 and the cooling plate 25 are started, ambient temperature air from the outside is drawn in through the air inlet at the bottom of the bottom shell 21. The cooling fan 23 blows the drawn air upward. The airflow blows directly and concentratedly onto the cold end face of the cooling plate 25. When the airflow comes into contact with the low temperature cold end face, a violent heat exchange occurs. The heat in the airflow is quickly absorbed by the cooling plate 25, causing the airflow itself to be instantly cooled into low temperature cold air. The low temperature cold air is then blown to the cooling air duct 24 by the cooling fan 23 and blown to the outer wall of the transparent pot body 3 through the air outlet of the cooling air duct 24, ensuring that the cold air blown onto the transparent pot body 3 has a low temperature and strong defogging potential.

[0060] The cooling fan 23 includes a lower fixed plate and multiple blades connected sequentially from bottom to top. The lower fixed plate includes a central mounting part, a peripheral fixing part, and several connecting parts connecting the mounting part and the fixing part. The connecting parts are spaced apart, and an air inlet channel is formed between two adjacent connecting parts. A cooling motor is also provided in the accommodating cavity and below the cooling fan 23. The output shaft of the cooling motor is connected to the mounting part of the lower fixed plate, thereby driving the rotation of the cooling fan 23. Furthermore, the multiple blades are circumferentially distributed around the center of the lower fixed plate, and an air outlet channel is provided between two adjacent blades. The cooling plate 25 and the tips of the multiple blades have a very small gap, which can be set to 1mm-3mm. This ensures that the cooling fan can rotate freely without scratching the cooling plate, while minimizing the loss of air pressure and air volume caused by this gap, ensuring that the airflow can efficiently impact the cold end face of the cooling plate.

[0061] After the cooling fan 23 and the cooling plate 25 are started, ambient temperature air is drawn into the cooling fan 23 through the air inlet and air intake channel at the bottom of the casing 21, and reaches the cold end face of the cooling plate 25. This allows for heat exchange between the ambient temperature air and the cold end face of the cooling plate 25, forming low-temperature cold air. Driven by the cooling fan 23, this cold air then enters the cooling air duct 24 through the air outlet channel. This frontal impact design significantly enhances the heat transfer efficiency between the airflow and the cold end face, far superior to natural convection or slow airflow over the cold end face. Furthermore, the airflow must be in contact with the cold end face, ensuring that all air driven by the cooling fan 23 is cooled.

[0062] The area of ​​its cooling plate 25 is equal to or greater than the area of ​​the cooling fan 23, ensuring that the air driven by the cooling fan 23 can have sufficient and uniform heat exchange with the cold end face of the cooling plate 25, thus maximizing the efficiency of the cooling airflow.

[0063] In addition, the cooling power of the cooling chip 25 can be linearly adjusted by changing the input current of the cooling chip 25, thereby controlling the temperature of the cold air and achieving precise control while ensuring the defogging effect.

[0064] It should be noted that the working principle of the cooling element 25 is the Peltier effect, which essentially pumps heat from the cold end to the hot end. The temperature of its cold end surface drops rapidly to cool the airflow; the temperature of its hot end surface rises rapidly, generating a large amount of waste heat. If this heat is not dissipated in time, it will seriously affect the cooling efficiency of the cooling element 25 or even burn itself out.

[0065] To dissipate the heat generated by the hot end face of the cooling element 25, a heat-conducting element is provided between the hot end face of the cooling element 25 and the bottom of the transparent pot body 3. This heat-conducting element transfers the heat generated by the hot end face of the cooling element 25 to the bottom of the transparent pot body 3 for auxiliary heating or heat preservation of the food inside the transparent pot body 3. The heat-conducting element can be a metal plate with high thermal conductivity, such as aluminum or copper. The bottom plate 22 can also be a metal plate with high thermal conductivity, and its heat-conducting element can be located between the cooling element 25 and the bottom plate 22, or between the bottom plate 22 and the transparent pot body 3, so that the heat generated by the hot end face of the cooling element 25 is transferred upwards to the bottom of the transparent pot body 3 through the heat-conducting element and the bottom plate 22. In other embodiments, the bottom plate 22, made of a metal with high thermal conductivity, can directly serve as a heat-conducting element, with the hot end face of the cooling element 25 in contact with the bottom plate 22, facilitating the direct transfer of heat from the hot end face of the cooling element 25 to the bottom of the transparent pot body 3 through the bottom plate 22.

[0066] The area of ​​the heat-conducting component is greater than or equal to the area of ​​the cooling chip 25, ensuring that the heat-conducting component has sufficient capacity to bear and diffuse the heat, preventing heat from accumulating on the hot end of the cooling chip 25, and ensuring that the cooling chip 25 operates efficiently and safely.

[0067] The air outlets of the cooling air duct 24 are arranged around the side wall of the transparent pot body 3, that is, several air outlets are evenly distributed at the edge of the bottom plate 22. The surrounding air outlets ensure that the cooling airflow is evenly distributed to the entire side wall of the transparent pot body 3, so that the transparent pot body 3 cools down synchronously and evenly as a whole, avoiding huge temperature differences between local and overall areas or between different areas. Compared with single-point air outlets, it has a faster defogging speed and a more thorough effect, and can quickly restore the transparency of the transparent pot body 3 to meet the user's visibility needs.

[0068] The tilt angle of the air outlet of the cooling air duct 24 is set to 75°-85°, which ensures that the cooling airflow has a sufficiently large vertical upward velocity component, which can overcome gravity and air resistance, and continuously impact upward along the outer wall of the transparent pot 3, eventually covering and cooling the entire outer wall of the transparent pot 3, including the highest edge area, thereby achieving uniform demisting without dead angles.

[0069] Furthermore, after the high-speed airflow is ejected from the air outlet of the cooling air duct 24 at an acute angle, it will closely adhere to the outer wall of the transparent pot body 3 and flow upward. This wall-adhering flow maximizes the contact area and extends the contact time between the cooling airflow and the outer wall of the transparent pot body 3, thereby greatly enhancing the heat exchange efficiency between the cooling airflow and the outer wall of the transparent pot body 3, and can quickly and evenly reduce the temperature of the transparent pot body 3.

[0070] The outer diameter of the transparent pot body 3 gradually increases from bottom to top, making the outer wall surface of the transparent pot body 3 a gradually expanding slope, which can provide a very ideal and smooth guide surface for the cooling airflow. The airflow can flow naturally along this outward expanding slope, reducing the risk of the airflow separating from the outer wall of the transparent pot body, making the cooling airflow distribution more uniform and stable.

[0071] Furthermore, as the cooling airflow rises, its speed naturally decreases and the static pressure increases as the cross-sectional area of ​​the transparent pot body 3 expands, thus better covering and cooling the larger area of ​​the upper part of the transparent pot body 3.

[0072] In addition, the control unit is also configured to turn on the cooling fan 23 and the cooling plate 25 when cooking is completed or the cooking time is less than a preset time threshold. The cold air blown out by the cooling fan 23 is cooled by the cooling plate 25 and then blown to the transparent pot body 3 through the cooling air duct 24 to cool it down.

[0073] The transparent pot body 3 reaches an extremely high temperature after cooking, and users are very likely to be burned when opening the lid, lifting the pot, or washing it in this state. When cooking is completed or the cooking time is less than the preset time threshold, the cooling fan 23 and the cooling plate 25 are activated. The cooling fan 23 blows the cold air generated by the cooling plate 25 through the surrounding cooling air duct 24 to the outer wall of the high-temperature transparent pot body 3. Through forced convection heat exchange, the outer surface temperature of the transparent pot body 3 is quickly and actively reduced, thus avoiding the risk of burns caused by contact with the high-temperature transparent pot body 3 from the root, and greatly improving the overall safety and user experience.

[0074] When cooking is complete or the cooking time is less than the preset time threshold, the heating element 111 has stopped working, but the food is still at a high temperature. At this time, the heat generated by the hot end of the cooling plate 25 is transferred to the bottom of the transparent pot body 3 to keep the food warm for a short time, preventing the food from cooling down quickly due to the rapid cooling of the pot body. This improves the taste of the food and converts the waste heat generated by the cooling into useful heat energy for heat preservation, thereby improving the energy utilization efficiency of the entire system.

[0075] The bottom wall of the bottom shell 21 is provided with several guide walls 28, which are evenly distributed around the circumference of the cooling fan 23. This ensures that the airflow blown by the cooling fan 23 is evenly delivered into the cooling air duct 24, guaranteeing that each air outlet surrounding the transparent pot body 3 receives airflow with basically consistent air pressure and volume. This improves the cooling uniformity of the side wall of the transparent pot body 3 and further enhances the demisting performance. The guide walls 28 are arc-shaped, providing a smooth flow path for the airflow. This allows the airflow to flow in the direction indicated by the guide walls 28, minimizing eddies and kinetic energy loss. This allows the airflow to reach the final air outlet at a higher speed and pressure, enhancing the heat exchange effect against the outer wall of the transparent pot body 3. It also reduces turbulent noise generated by airflow impact and eddies, making the equipment operate more quietly.

[0076] Example 3: The difference between this embodiment and the previous embodiment is that the cold end face of the cooling chip 25 is provided with heat dissipation fins, which are made of metal. This allows the cold energy generated on the cold end face to be efficiently conducted to the heat dissipation fins, thereby reducing the temperature of the heat dissipation fins. The heat dissipation fins transform a flat cold end face into a complex three-dimensional structure with a large surface area, greatly increasing the surface area in contact with the air and significantly enhancing heat exchange efficiency.

[0077] Several blades surround the heat dissipation fins, so that the cooling fan 23 draws in ambient temperature air from outside through the air inlet and air intake channel at the bottom of the base 21 to the heat dissipation fins. When the ambient temperature air comes into contact with the low temperature heat dissipation fin surface, a violent heat exchange occurs to form a cooling airflow, and the heat absorbed by the heat dissipation fins is absorbed by its hot end face, thereby maintaining a low temperature.

[0078] If the cold end face temperature of the cooling element 25 is too low, water vapor in the air will frost on it. Frost is an excellent thermal insulator, and once frost forms, heat exchange will deteriorate drastically, causing the cooling element to fail. By expanding the surface area, the heat dissipation fins prevent the surface temperature from dropping too low under the same cooling power, thus delaying or preventing frost formation and improving the stability of the cooling element 25 in humid environments.

[0079] To achieve the same cooling effect, smaller cooling fins can be used, which is beneficial for product miniaturization and compact design.

[0080] Example 4: The difference between this embodiment and the above embodiments is that: [combination] Figure 4The base 2 is provided with a partition 27, which divides the cooling air duct 24 into a first air duct 241 and a second air duct 242. The first air duct 241 is located outside the second air duct 242. Both the first air duct 241 and the second air duct 242 are connected to the air outlet of the cooling fan 23. The air outlet of the cooling air duct 24 includes a first air outlet 243 connected to the first air duct 241 and a second air outlet 244 connected to the second air duct 242. The air outlets of the first air outlet 243 and the second air outlet 244 are both tilted upward toward the outer wall of the transparent pot body 3, and the tilt angles are different.

[0081] After the cooling fan 23 and the cooling plate 25 are started, ambient temperature air from the outside is drawn in through the air inlet at the bottom of the bottom shell 21. The cooling fan 25 blows this drawn-in air upwards, and the airflow blows directly and concentratedly onto the cold end face of the cooling plate 25. When the airflow comes into contact with the low-temperature cold end face, a violent heat exchange occurs. The heat in the airflow is quickly absorbed by the cooling plate 25, causing the airflow itself to be instantly cooled into low-temperature cold air. Driven by the cooling fan 23, the low-temperature cold air enters the first air duct 241 and the second air duct 242 divided by the separator 27, and is finally blown out from the first air outlet 243 and the second air outlet 244 respectively, acting on the outer wall of the transparent pot to cool down or remove fog.

[0082] The first air duct 241 is located outside the second air duct 242, meaning that the cooling airflow is divided into inner and outer layers as it flows outward from the center of the base 2. The second air outlet 244 of the second air duct 242 is closer to the bottom center area of ​​the transparent pot body 3. Due to its upward tilt, the airflow mainly covers the outer wall of the lower middle part of the transparent pot body 3. The first air outlet 243 of the first air duct 241, due to its different tilt angle, mainly covers the outer wall of the upper middle part, i.e., the top, of the transparent pot body 3. These two airflows, originating from different radial positions and blowing towards the outer wall of the transparent pot body 3 at different angles, together form a three-dimensional cooling air curtain that tightly wraps the transparent pot body 3 from bottom to top. This eliminates the cooling blind spots that may exist in a single air duct, ensuring that every height area of ​​the transparent pot body 3 can be directly and effectively covered by cooling airflow, achieving rapid and uniform cooling, thereby efficiently defogging and cooling.

[0083] Furthermore, the two airflows will inevitably converge, collide, and mix in a specific area on the outer wall of the transparent pot 3, which will greatly disrupt the static air boundary layer on the surface of the outer wall of the transparent pot 3 and generate strong turbulence. This will efficiently mix and carry away the high-temperature hot air and cooling airflow that are close to the outer wall of the transparent pot 3, while allowing the new low-temperature cooling air to directly contact the transparent pot 3, which greatly improves the heat exchange efficiency.

[0084] The tilt angle of the first air outlet 243 is 75°-80°, specifically set to 78°. This ensures that the cooling airflow has a sufficiently large vertical velocity component to overcome gravity and air resistance, reaching the highest edge of the pot body and ensuring that the entire transparent pot body 3 is covered by cooling air from top to bottom. If the angle is too small, the airflow will dissipate horizontally prematurely before reaching the top, resulting in insufficient cooling at the top of the transparent pot body 3 and creating a defogging blind spot. If the angle is 90° vertically upward, the airflow will rush straight upward, only impacting a small area of ​​the outer wall of the transparent pot body 3, failing to spread out effectively to cover the curved surface of the side wall of the transparent pot body 3. The 78° tilt angle allows the airflow to move upward while also having a moderate horizontal velocity. This horizontal airflow allows the airflow to climb and spread along the side wall of the transparent pot body 3, effectively covering a large area of ​​the upper part of the transparent pot body 3 while reaching the top, achieving the best balance between coverage breadth and reach height.

[0085] The second air outlet 244 has an inclination angle of 76°-83°, specifically set to 80°. Its airflow has an extremely strong vertical velocity, which can directly and at high speed impact the lower outer wall of the transparent pot body 3. This frontal impact can most effectively break the high-temperature air boundary layer in this area, achieve the highest heat exchange efficiency, and quickly reduce the temperature of the transparent pot body 3 in the area where the food is located. The 80° inclination angle can ensure that the airflow impacts the wall at the maximum vertical velocity, and also ensure that the airflow after impact can stably adhere to the outer wall of the transparent pot body 3 and flow upward without separation, so that energy is used efficiently.

[0086] The airflow direction of the first air outlet 243 extends to the top of the transparent pot body 3, and the intersection of the airflow direction extension line of the second air outlet 244 and the transparent pot body 3 is located at 1 / 3-3 / 4 of the height of the transparent pot body 3. This allows the airflow of the first air outlet 243 to cover the lower middle part, and the airflow of the second air outlet 244 to cover the upper middle part to the top. The two are connected end to end in space and closely overlap, achieving full coverage of the side wall of the transparent pot body 3 without dead angles. This ensures that the entire transparent pot body 3 can be cooled synchronously and evenly, and can quickly remove fog and actively cool.

[0087] The top edge of the transparent pot body 3 is the top of the cooking cavity, where most of the rising water vapor gathers and is prone to fogging. The cooling airflow from the first air outlet 243 is guided to the top of the transparent pot body 3, so that the rising water vapor is cooled down before it comes into contact with the top of the transparent pot body 3, or prevents it from condensing stably on the cooled top wall, thus eliminating the fogging blind spot at the top and ensuring a clear view.

[0088] The lower middle part of the transparent pot body 3 is the core area where food accumulates during cooking, and it is also the main area where hot air from the heating element 111 blows directly. Therefore, it is the area with the highest temperature and the most concentrated heat. By precisely guiding the cooling airflow from the second air outlet 244 to this area, the temperature of the main heat source area of ​​the transparent pot body 3 can be reduced most quickly and effectively, thus improving the defogging efficiency.

[0089] Combination Figure 5 The bottom wall of the bottom shell 21 and / or the partition 27 are provided with a number of guide walls 28. The guide walls 28 are evenly distributed along the circumference of the cooling fan 23, which can evenly deliver the airflow blown out by the cooling fan 23 to the first air duct 241 and the second air duct 242, ensuring that each air outlet around the transparent pot body 3 can obtain airflow with basically the same air pressure and air volume, improving the cooling uniformity of the side wall of the transparent pot body 3, and further improving the demisting performance.

[0090] Example 5: The difference between this embodiment and the above embodiments is that: Figure 6 As shown, the support arm 4 includes an inner wall and an outer wall, which together form a sandwich cavity 291. The sandwich cavity 291 is connected to the accommodating cavity 29. The air outlet of its cooling air duct 24 is located on the inner wall of the support arm 4 and faces the rear side of the transparent pot body 3.

[0091] After the cooling fan 23 and the cooling plate 25 are started, ambient temperature air from the outside is drawn in through the air inlet at the bottom of the bottom shell 21. The cooling fan 25 blows this drawn-in air upwards, and the airflow blows directly and concentratedly onto the cold end face of the cooling plate 25. When the airflow comes into contact with the low-temperature cold end face, a violent heat exchange occurs. The heat in the airflow is quickly absorbed by the cooling plate 25, causing the airflow itself to be instantly cooled into low-temperature cold air. Driven by the cooling fan 23, the low-temperature cold air enters the jacket cavity and is blown to the rear side of the transparent pot body 3 through the air outlet of the cooling air duct 24. The low-temperature cold air blown out from the rear side will naturally wrap around both sides through the wall adhesion effect, and can still effectively cover the side wall of the transparent pot body 3, effectively cooling the side wall of the transparent pot body 3.

[0092] At the same time, it can provide a low-temperature environment for the cables that may exist inside the support arm 4, which can prevent the temperature inside the support arm 4 from getting too high due to long-term radiant heat from the transparent pot 3, effectively delaying the aging process of the internal cable insulation layer and improving the long-term reliability of the equipment.

[0093] As another feasible implementation method, combined with Figure 7A cold air gap 41 is provided between the transparent pot body 3 and the support arm 4. The air outlet of the cooling air duct 24 is located on the side near the base 2 and the support arm 4, so that the low-temperature cold air blown out by the cooling fan 23 can be blown into the cold air gap 41 through the air outlet of the cooling air duct 24 and blown towards the rear side of the transparent pot body 3. The low-temperature cold air blown out from the rear side will naturally wrap around both sides through the wall adhesion effect, and can still effectively cover the side wall of the transparent pot body 3 to achieve effective cooling.

[0094] The rear-mounted cooling air duct 24, the cold air gap 41, and the wall of the transparent pot body 3 together form a highly efficient airflow shaping system. This system collects the dispersed airflow, accelerates and directs it, and uses the fluid properties to wrap it around the transparent pot body 3. This efficiently converts the limited cooling energy into effective heat exchange, thereby improving the demisting effect and cooling performance.

[0095] Example 6: The difference between this embodiment and the above embodiments is that: Figure 8 As shown, the cooling element 25 is disposed on the rear side of the transparent pot body 3, with the cold end face of the cooling element 25 facing the support arm 4. A cold air gap 41 is provided between the transparent pot body 3 and the support arm 4. The air outlet of the cooling air duct 24 is located on the side near the base 2 and near the support arm 4, so that the cooling fan 25 can draw in ambient temperature air from the air inlet at the bottom of the bottom shell 21, blow the drawn air through the air outlet of the cooling air duct 24 into the cold air gap 41, and flow through the cold end face of the cooling element 25 to generate a cooling airflow that blows towards the rear side of the transparent pot body 3. The cooling airflow blown out from the rear side will naturally wrap around to both sides due to the wall adhesion effect, still effectively covering the side walls of the transparent pot body 3, achieving effective cooling. In this embodiment, the cooling fan 25 can be a common fan such as a centrifugal fan.

[0096] A heat-conducting element is provided between the rear side of the transparent pot body 3 and the hot end face of the cooling plate 25, so that the heat-conducting element transfers the heat generated by the hot end face of the cooling plate 25 to the rear side of the transparent pot body 3 for auxiliary heating or heat preservation of the food inside the transparent pot body 3. The heat-conducting element can be a metal plate with high thermal conductivity, such as aluminum or copper.

[0097] The cold end face of the cooling plate 25 is equipped with heat dissipation fins made of metal, which allows the cold energy generated on the cold end face to be efficiently conducted to the heat dissipation fins, thereby reducing the temperature of the heat dissipation fins. The heat dissipation fins transform a flat cold end face into a complex three-dimensional structure with a large surface area, greatly increasing the surface area in contact with the air and significantly enhancing heat exchange efficiency.

[0098] In other embodiments, the cooling plate 25 is disposed on the side of the support arm 4 near the transparent pot body 3, and the cold end face of the cooling plate 25 faces the rear side of the transparent pot body 3, so that the air blown out by the cooling fan 23 is blown into the cold air gap 41 through the cooling air duct 24 and flows through the cold end face of the cooling plate 25 to generate a cooling airflow. The cooling airflow blown out from the rear side will naturally wrap around to both sides through the wall adhesion effect, and can still effectively cover the side wall of the transparent pot body 3 to achieve effective cooling.

[0099] By placing the cooling element 25 and related air ducts close together and arranging them using the support arm 4, it is equivalent to mounting the cooling system on the existing structure, without having to create a lot of space in other areas of the base 2, making the overall structure more compact and orderly.

[0100] Example 7: The difference between this embodiment and the above embodiments is that: Figure 9 As shown, the support arm 4 includes an inner wall and an outer wall, which together form a sandwich cavity 291. The sandwich cavity 291 is connected to the accommodating cavity 29. The air outlet of its cooling air duct 24 is located on the inner wall of the support arm 4 and faces the rear side of the transparent pot body 3.

[0101] The cooling element 25 is installed on the outer wall of the support arm 4 and located in the interlayer cavity 291, so that the air blown out by the cooling fan 23 is blown into the interlayer cavity 291 through the accommodating cavity 29 and flows through the cold end face of the cooling element 25 to form a cooling airflow. The cooling airflow is blown towards the rear side of the transparent pot body 3 through the air outlet of the cooling air duct 24. The cooling airflow blown out from the rear side will naturally wrap around to both sides through the wall adhesion effect, and can still effectively cover the side wall of the transparent pot body 3 to achieve effective cooling.

[0102] The cold end face of the cooling plate 25 is equipped with heat dissipation fins made of metal, which allows the cold energy generated on the cold end face to be efficiently conducted to the heat dissipation fins, thereby reducing the temperature of the heat dissipation fins. The heat dissipation fins transform a flat cold end face into a complex three-dimensional structure with a large surface area, greatly increasing the surface area in contact with the air and significantly enhancing heat exchange efficiency.

[0103] The hot end face of the cooling chip 25 is provided with fins made of a high thermal conductivity material. The fins can diffuse the heat generated by the hot end face of the cooling chip 25 outward, ensuring the cooling performance of the cooling chip 25 and extending its service life.

[0104] In this embodiment, the base 2 may be provided with a partition 27 that divides the cooling air duct 24 into a first air duct 241 and a second air duct 242, both of which are connected to the interlayer cavity 291; in other embodiments, the base 2 does not have a partition 27.

[0105] Example 8: The difference between this embodiment and the above embodiments is that: Figure 10 As shown, both the cooling fan 23 and the cooling plate 25 are disposed within the accommodating cavity. The cooling plate 25 is a hollow annular shape, and the thermocouples inside based on the Peltier effect are also arranged in a ring. The cooling fan 23 is placed in the central cavity of the annular cooling plate 25, and the axis of the cooling fan 23 coincides with the axis of the cooling plate 25. Its diameter is slightly smaller than the inner diameter of the annular cooling plate 25 to ensure that the cooling fan 23 can rotate normally without friction with it.

[0106] The cooling plate 25 is disposed on the base plate 22 with its cold end face downwards. The height of the cold end face of the cooling plate 25 is slightly lower than the top surface of the cooling fan 23, or the height of the cold end face of the cooling plate 25 is flush with the top surface of the cooling fan 23, so that the airflow blown out by the cooling fan 23 passes through the cold end face of the cooling plate 25. In other embodiments, annular heat dissipation fins are installed on the cold end face. The heat dissipation fins are arranged radially or in an annular array, and their gaps form airflow channels.

[0107] When the cooling fan 23 and the cooling plate 25 are turned on, ambient temperature air is drawn in from the air inlet at the bottom of the base 2. The airflow is blown upward by the cooling fan 23 and diffused radially in all directions. It is forced to pass through the dense heat dissipation fins on the annular cold end face. During this process, the airflow and the surface of the heat dissipation fins undergo intense and uniform heat exchange and are rapidly cooled. Finally, the cooled airflow flows out evenly from the circumferential edge of the annular cooling plate 25 and directly enters the cooling air duct 24. Then, it is guided by the annular air outlet to the entire outer wall of the transparent pot body 3.

[0108] The hot end face of the cooling plate 25 can be provided with an annular heat conductor, which transfers waste heat to the bottom of the transparent pot body 3. This means that the auxiliary heating of the bottom of the transparent pot body 3 is also uniform, avoiding the local overheating phenomenon that may be caused by the square cooling plate, and the heating is more uniform.

[0109] In other embodiments, the cooling element 25 is disposed on the bottom wall of the accommodating cavity 29, with the cold end face of the cooling element 25 facing upwards. The height of the cold end face of the cooling element 25 is slightly higher than or flush with the air outlet of the cooling fan 23, so that the airflow from the cooling fan 23 passes over the cold end face of the cooling element 25. The hot end face of the cooling element 25 is provided with annular fins, which transfer waste heat to the outside of the base 2 to ensure the cooling effect and service life of the cooling element 25.

[0110] Example 9: The difference between this embodiment and the above embodiments is that: Figure 11As shown, a cooling fan 23 and a cooling plate 25 located on one side of the cooling fan 23 are provided in the accommodating cavity 29. The cooling fan 23 and the cooling plate 25 may be at the same height or one may be at a different height, but on the horizontal projection plane, one is located on the left and the other is located on the right.

[0111] It should be noted that the air outlet of the cooling air duct 24 is located on the side near the base 2 and near the support arm 4, or the air outlet of the cooling air duct 23 is connected to the interlayer cavity 291 inside the support arm 4.

[0112] As a feasible implementation, the cooling chip 25 is located on the base plate 22 near the support arm 4, the cold end face of the cooling chip 23 is set downwards, the cooling fan 23 is located at the center of the base 2 or on the side away from the support arm 4, and the air inlet at the bottom of the bottom shell 21 corresponds to the air inlet of the cooling fan 23, so that the room temperature air drawn in from the bottom is directly blown to the cold end face of the cooling chip 25, the airflow is cooled after heat exchange with it, and then the cooled airflow is discharged through the air outlet of the cooling air duct 24 to cool the outer wall of the transparent pot body 3.

[0113] As another feasible implementation, the cold end face of the cooling chip 25 is placed on the air intake path of the cooling fan 23. The outside air first flows through the cold end face of the cooling chip 25 and is cooled, and then is drawn in by the cooling fan 23 and blown out through the air outlet of the cooling duct 24 to cool the outer wall of the transparent pot body 3.

[0114] The cooling fan 23 is located at the center of the base 2. The cooling chip 25 is arranged in a ring around the cooling fan 23 with its cold end face facing down. The air inlet at the bottom of the bottom shell 21 is located around the bottom shell 21. Driven by the cooling fan 23, the outside air first flows through the cold end face of the cooling chip 25 and is cooled, and then is drawn in by the cooling fan 23 and blown out through the air outlet of the cooling air duct 24.

[0115] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multifunctional cooking device, comprising a head, a base, a transparent pot body placed on the base, and a support arm for connecting the head and the base, wherein the head is fastened to the transparent pot body to form a cooking cavity, and a hot air circulation component is provided inside the head, characterized in that: The base is equipped with a cooling fan and a cooling duct connected to the cooling fan. The air outlet of the cooling duct faces the outer wall of the transparent pot. It also includes a cooling plate located on the air outlet or air inlet path of the cooling fan. It also includes a control unit, which is configured to: when water mist is detected on the inner wall of the transparent pot, control the cooling fan to turn on, and the air blown out by the cooling fan is cooled by the cooling plate and then blown to the transparent pot through the cooling air duct to intermittently defog it.

2. The multifunctional cooking device according to claim 1, characterized in that: The cooling element is disposed within the base and above the cooling fan, with the cold end face of the cooling element facing the cooling fan; or, the cooling element is arranged in a ring and disposed outside the cooling fan.

3. The multifunctional cooking device according to claim 2, characterized in that: The air outlet of the cooling air duct is arranged around the side wall of the transparent pot body.

4. The multifunctional cooking device according to claim 1, characterized in that: The cooling element is mounted on the support arm, with its cold end facing the rear of the transparent pot; or, the cooling element is mounted on the rear of the transparent pot, with its cold end facing the support arm; or, the cooling element is mounted on one side of the cooling fan.

5. A multifunctional cooking device according to claim 4, characterized in that: The air outlet of the cooling air duct is located on the side near the base and the support arm.

6. A multifunctional cooking device according to claim 2 or 4, characterized in that, The control unit is also configured to: when cooking is completed or the cooking time is less than a preset time threshold, control the cooling fan to turn on, and the cold air blown out by the cooling fan is cooled by the cooling plate and then blown to the transparent pot body through the cooling air duct to cool it down.

7. A multifunctional cooking device according to claim 2 or 4, characterized in that: A heat-conducting element is provided between the hot end face of the cooling chip and the bottom of the transparent pot body, so that the heat-conducting element transfers heat to the bottom of the transparent pot body; or, a heat-conducting element is provided on the rear side of the transparent pot body, with the hot end face of the cooling chip facing the heat-conducting element, so that the heat-conducting element transfers heat to the side wall of the transparent pot body.

8. A multifunctional cooking device according to claim 1, characterized in that: The base is provided with a partition, which divides the cooling air duct into a first air duct and a second air duct. The air outlet of the cooling air duct includes a first air outlet connected to the first air duct and a second air outlet connected to the second air duct. The air outlets of the first and second air outlets are inclined upwards and have different inclination angles.

9. A multifunctional cooking device according to claim 8, characterized in that: The tilt angle of the first air outlet is 75°-80°, and the tilt angle of the second air outlet is 76°-83°.

10. A multifunctional cooking device according to claim 8 or 9, characterized in that: The airflow direction of the first air outlet extends to the top of the transparent pot body, and the intersection of the airflow direction extension line of the second air outlet and the transparent pot body is located at 1 / 3-3 / 4 of the height of the transparent pot body.

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