Multifunctional cooking appliances and their heating methods

Abstract

This invention provides a multifunctional cooking appliance, including a base, a pot body, a first upper cover, and a connecting structure. The base has an open heating chamber, a first heating element, a first temperature detection device, a power supply device, and a control device. The first heating element is disposed within the heating chamber. The pot body is located within the heating chamber. The first upper cover seals the opening of the heating chamber and has a blower mechanism, a second heating element, a second temperature detection device, and a power supply circuit. The second heating element is located on the lower end face of the first upper cover. The blower mechanism and the second heating element are electrically connected to the power supply circuit. The connecting structure is used to realize the electrical connection between the power supply device and the power supply circuit. When the first upper cover and the base are connected by the connecting structure, the power supply device supplies power to the power supply circuit, and the control device can control the operation of the second heating element. This multifunctional cooking appliance can simultaneously heat the lower and upper parts of the pot body, or alternately heat the lower and upper parts of the pot body, so that the upper and lower sides of the food are heated evenly.

Description

Technical Field

[0001] This invention relates to the field of cooking appliances, and in particular to a multifunctional cooking appliance and a heating method for the multifunctional cooking appliance. Background Technology

[0002] As people's dietary preferences continue to change, the variety of cooking appliances on the market has also increased, including appliances such as air fryers, microwave ovens, and electric frying pans. Air fryers and microwave ovens heat food placed on the grill by heating elements located above the grill, while electric frying pans heat food by heating elements located at the bottom of the pan. Since these cooking appliances can only heat one side of the food, users need to flip the food regularly during cooking to ensure even heating. For users with little cooking experience, it is easy to burn the food when using these appliances because they cannot accurately control the timing of flipping, which affects the user's cooking experience. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multifunctional cooking appliance, which has a first heating element and a second heating element respectively arranged below and above the pot body for holding food, so as to simultaneously heat the bottom and top of the pot body, or alternately heat the bottom and top of the pot body, thereby making the upper and lower sides of the food evenly heated and saving the user the trouble of flipping the food during the cooking process.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A multi-functional cooking appliance includes a base, a pot body, a first upper cover, and a connecting structure. The base has an open heating chamber, a first heating element, a first temperature detection device, a power supply device, and a control device. The first heating element is located inside the heating chamber. The power supply device is electrically connected to the first heating element. The first temperature detection device and the first heating element are communicatively connected to the control device, which can obtain heating temperature data through the first temperature detection device. The pot body is located inside the heating chamber. The first upper cover seals the opening of the heating chamber and has a blower mechanism, a second heating element, a second temperature detection device, and a power supply circuit. The second heating element is located on the lower end face of the first upper cover. The blower mechanism and the second heating element are electrically connected to the power supply circuit. The blower mechanism is used to output airflow from the second heating element to the heating chamber. The connecting structure is located between the base and the first upper cover to realize the electrical connection between the power supply device and the power supply circuit. When the first upper cover and the base are connected by the connecting structure, the power supply device supplies power to the power supply circuit, and the control device can control the operation of the second heating element. The second temperature detection device has a thermistor element, and the control device can obtain heating temperature data by detecting changes in the current parameters of the power supply circuit.

[0006] Compared with the prior art, the multifunctional cooking appliance of the present invention has the following beneficial effects:

[0007] (1) The multifunctional cooking appliance of the present invention has a first heating element on the base and a second heating element on the first upper cover, so as to heat the bottom and top of the pot body so that the upper and lower sides of the food can be heated, so that the user can complete the cooking without flipping the food during the cooking process, avoiding the situation of burning the food, thereby improving the user's cooking experience.

[0008] (2) The multifunctional cooking appliance of the present invention has a first heating element on the base and a second heating element on the first upper cover, so that the user can choose to activate the first heating element and the second heating element at the same time to heat the bottom and top of the pot body at the same time, or choose to activate the first heating element and the second heating element intermittently to alternately heat the bottom and top of the pot body, or choose to activate only the first heating element or the second heating element to heat the bottom or top of the pot body, so that the user can choose the corresponding heating method to heat the food according to the actual needs, and realize the cooking of the food in the pot body by multiple heating methods to meet people's different cooking preferences and cooking needs;

[0009] (3) In this invention, the control device can obtain the heating temperature data in the heating cavity through the first temperature detection device and the second temperature detection device, thereby ensuring that the heating temperature data in the heating cavity can be accurately obtained regardless of the heating method used by the user for cooking, and avoiding large errors in heating temperature data detection caused by the temperature detection device being too far away from the heating element due to the use of different heating methods during cooking.

[0010] Furthermore, the first cover includes an outer cover body, a mounting frame, and an inner cover body. The lower part of the outer cover body is provided with a mounting cavity, and the inner cover body and the mounting frame are installed into the mounting cavity from bottom to top. The lower part of the inner cover body is provided with a heating cavity, and the second heating element is installed into the heating cavity. The blower mechanism passes through the outer cover body, the mounting frame, and the inner cover body.

[0011] The above-mentioned setup has two advantages: firstly, the mounting frame facilitates the installation of components and reduces assembly difficulty; secondly, the mounting frame provides heat insulation, improving the safety of users when operating this invention.

[0012] Furthermore, a first airflow channel is provided between the mounting frame and the inner cover, and a first air hole is provided on the side wall of the heating cavity; the blower mechanism includes a drive motor, a first fan blade and a second fan blade, the blower mechanism is disposed on the outer cover, and its output end is inserted into the mounting frame and the inner cover, the first fan blade is located between the mounting frame and the inner cover, the second fan blade is located inside the heating cavity and above the second heating element, and the drive motor can drive the first fan blade and the second fan blade to work.

[0013] The above setup method has the following beneficial effects:

[0014] (1) In this invention, since the inner cover is in contact with the second heating element, the inner cover will transfer heat to the drive motor. The first fan blade can drive the air flow between the mounting frame and the inner cover, thereby cooling the inside of the first top cover, preventing heat accumulation, and improving the safety of the user when holding or removing the first top cover.

[0015] (2) In this invention, a first airflow channel is provided between the mounting frame and the inner cover, and a first air hole is provided on the side wall of the heating chamber. While the first fan blade drives the air flow between the mounting frame and the inner cover, it can make the air pressure in the first airflow channel greater than the air pressure in the heating chamber, so that the heated air in the first airflow channel flows into the heating chamber from the first air hole, thereby realizing heat recovery and utilization, accelerating the heating speed of the heating chamber, and saving energy and protecting the environment.

[0016] (3) In this invention, the second fan blade is used to drive the air flow in the heating cavity, so that the temperature in the heating cavity is relatively uniform, thereby ensuring that the food is heated evenly. The first fan blade and the second fan blade are driven by the drive motor (the drive motor drives the first fan blade and the second fan blade to rotate in the forward direction to generate downward airflow). The design is ingenious and the energy utilization efficiency is high.

[0017] Furthermore, the first vent is located at the lower end of the inner cover.

[0018] The above configuration allows the air flowing out of the first vent to diffuse evenly from the center of the heating chamber to the periphery, improving the efficiency of heat utilization.

[0019] Furthermore, the inner cover body has an oil-blocking component on the inner side of the lower part that is adapted to the upper opening of the pot body, and the oil-blocking component has a second air hole corresponding to the first air hole.

[0020] The oil-blocking device serves two purposes: firstly, it presses down on the pot body, improving its stability within the heating chamber; secondly, it prevents grease produced during cooking from entering the first vent and clogging it, thus reducing the difficulty of cleaning.

[0021] Furthermore, a distance is left between the oil baffle and the first air hole, and a gap is left between the pot body and the heating chamber to form a second airflow channel; a gap is left between the first heating element and the heating chamber to form a third airflow channel, and the second airflow channel and the third airflow channel are connected.

[0022] The oil-blocking component can guide the airflow from the first vent, directing a portion of the airflow from the first vent to the second airflow channel. The airflow then flows through the second airflow channel to the third airflow channel, thereby allowing the heat generated by the present invention to flow between the first cover and the heating chamber, making the heat in the space between the first cover and the heating chamber more uniform, thus improving the cooking effect.

[0023] Furthermore, the first upper cover is detachably connected to the base; the connection structure includes a connecting seat disposed on the side of the base, and a connecting groove disposed on the first upper cover corresponding to the connecting seat, the connecting seat being provided with a first power supply connection end for connecting a power supply device, and the connecting groove being provided with a second power supply connection end adapted to the first power supply connection end.

[0024] The first top cover and the base are detachable, so that after the user finishes using the weighing device, the top cover can be removed and only the first heating element on the base is used to heat the pot for cooking; by setting a second power supply connection terminal and electrically connecting it to the first power supply connection terminal, the power supply device on the base can supply power to the top cover and the control device can control the operation of the second heating element.

[0025] For cooking where only the first heating element is used, to avoid increasing user fatigue due to the excessive weight of the first cover, a second cover can be used to seal the opening of the heating cavity, thereby reducing the operational difficulty of the invention and enabling the switching of multiple cooking methods.

[0026] Another object of the present invention is to provide a heating method for the above-mentioned multifunctional cooking appliance, comprising:

[0027] When executing cooking settings:

[0028] If the control device is set to obtain heating temperature data based on the first temperature detection device;

[0029] When preheating the pot body, the first heating element is used for heating;

[0030] When cooking ingredients, the control device controls the first heating element to heat up to the set cooking temperature W1 and maintains the heating.

[0031] When the first heating element maintains heating, if the first temperature detection device detects that the heating temperature is greater than or equal to C, then the first heating element continues to heat for T1 seconds, stops working for T2 seconds, and continues to heat for T3 seconds. The above steps are repeated to achieve the cyclic heating of the first heating element until the cooking is finished, where 5≤T1, T2, T3≤60, and T1<T2<T3.

[0032] If the control device is set to obtain heating temperature data based on the second temperature detection device;

[0033] When preheating the pot body, a second heating element is used for heating;

[0034] When cooking ingredients, the control device controls the second heating element to heat up to the set cooking temperature W1 and maintain it for T4 seconds before stopping; the control device controls the first heating element to heat up to the set cooking temperature W1 and maintain it for T5 seconds before stopping; the above steps are repeated to achieve alternating heating of the second heating element and the first heating element until the cooking is finished, where 5≤T4, T5≤60, and T4>T5; during the heating process of the first heating element, the first temperature detection device works to detect the heating temperature of the first heating element.

[0035] Compared with the prior art, the heating method of the multifunctional cooking appliance of the present invention has the following beneficial effects:

[0036] (1) The heating method of the multifunctional cooking appliance of the present invention uses a multifunctional cooking appliance equipped with an upper heating element (second heating element) and a lower heating element (first heating element) to cook food, which makes it convenient for users to use different heating methods to heat food according to actual conditions, so as to meet different cooking preferences and cooking needs.

[0037] (2) In this invention, since the heating temperature can be detected by the first temperature detection device and the second temperature detection device respectively, but since the temperature detection positions of the first temperature detection device and the second temperature detection device are different, in order to achieve precise temperature control of the multifunctional cooking appliance (avoiding large error in the detection result due to the large distance between the temperature detection device and the heating point), it is necessary to set corresponding heating methods for the first temperature detection device and the second temperature detection device as the main temperature detection device respectively; wherein when the first temperature detection device is the main temperature detection device, the pot body is mainly heated by the first heating element; when the second temperature detection device is the main temperature detection device, the pot body is mainly heated by the second heating element, and the first heating element assists in heating the pot body, and the two work intermittently to alternately heat the pot body;

[0038] (3) By flexibly using the first heating element and the second heating element to heat the food, the multifunctional cooking appliance can realize multiple functions such as steaming, boiling and frying. For example, by using the first top cover to cover the opening of the heating cavity and using the second heating element to heat the food, the multifunctional cooking appliance can realize the air-frying function of an air fryer. If the top and bottom are heated at the same time, the food can be fried on both sides, so that the food is heated evenly.

[0039] Furthermore, when executing cooking settings:

[0040] If the opening of the heating chamber is sealed with the first top cover, and a setting control device is set to obtain heating temperature data according to the first temperature detection device;

[0041] When preheating the pot and cooking the ingredients, the first heating element and the blower mechanism work.

[0042] If the opening of the heating chamber is not covered by the first top cover, only the first heating element is needed to heat the pot body. If the opening of the heating chamber is covered by the first top cover, and the control device obtains the heating temperature data based on the first temperature detection device, the first heating element is mainly used to heat the pot body. At this time, the blower mechanism is activated. On the one hand, it can make the heat in the heating chamber more uniform and improve the cooking effect. On the other hand, it can increase the gas flow speed in the heating chamber and prevent heat from accumulating around the first heating element.

[0043] Furthermore, after the pot body is preheated, if no food is being cooked, it is determined whether the set cooking temperature W1 is higher than the preset heat preservation temperature W2. If W1 > W2, the first heating element and the second heating element are kept warm at temperature W2; otherwise, the first heating element and the second heating element are kept warm at temperature W1. The first heating element and the second heating element stop working after being kept warm for T0 seconds. The preset heat preservation temperature W2 is 160-170℃.

[0044] The above settings ensure that the pot maintains a reasonable temperature after preheating with low power before cooking the ingredients. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the invention from a first angle;

[0046] Figure 2 This is a second-angle schematic diagram of the present invention;

[0047] Figure 3 This is an exploded view of the present invention;

[0048] Figure 4 This is a schematic diagram of the first top cover;

[0049] Figure 5 This is a sectional view of the first top cover;

[0050] Figure 6 This is a cross-sectional view of the present invention;

[0051] Figure 7 This is an assembly diagram of the base and the pot body;

[0052] Figure 8 This is a schematic diagram of the machine base;

[0053] Figure 9 This is an assembly diagram of the base and the second top cover.

[0054] Label Explanation:

[0055] 1. Base, 2. Heating chamber, 3. First heating element, 4. Control device, 5. Operation panel, 6. Display screen, 7. Second airflow channel, 8. Third airflow channel, 9. Pot body, 10. First top cover, 11. Outer cover, 12. Mounting frame, 13. Inner cover, 14. Mounting chamber, 15. First airflow channel, 16. First air hole, 17. Second heating element, 18. Drive motor, 19. First fan blade, 20. Second fan blade, 21. Oil baffle, 22. Second air hole, 23. Connecting structure, 24. Connecting seat, 25. Connecting groove, 26. First power supply connection end, 27. Second power supply connection end, 28. Protrusion, 29. Groove, 30. Limiting rib, 31. Second top cover, 32. Detailed Implementation

[0056] The embodiments of the present invention are described below with reference to the accompanying drawings:

[0057] Example 1

[0058] See Figures 1 to 8 The multifunctional cooking appliance of this embodiment includes a base 1, a pot body 9, a first upper cover 10, and a connecting structure 24. The base 1 is provided with an open heating chamber 2, a first heating element 3, a first temperature detection device (not shown in the figure), a power supply device (not shown in the figure), and a control device 4. The first heating element 3 is disposed in the heating chamber 2. The power supply device is electrically connected to the first heating element 3. The first temperature detection device, the first heating element 3, and the control device 4 are communicatively connected. The control device 4 can obtain heating temperature data through the first temperature detection device. The pot body 9 is located in the heating chamber 2. The first upper cover 10 covers the opening of the heating chamber 2 and is provided with a blower mechanism, a second heating element 18, and a second temperature detection device. The device includes a power supply circuit (not shown in the figure), a second heating element 18 located on the lower end surface of the first upper cover 10, a blower mechanism and the second heating element 18 electrically connected to the power supply circuit, the blower mechanism being used to output airflow from the second heating element 18 to the heating chamber 2; a connecting structure 24 is disposed between the base 1 and the first upper cover 10 to realize the electrical connection between the power supply device and the power supply circuit; when the first upper cover 10 and the base 1 are connected through the connecting structure 24, the power supply device supplies power to the power supply circuit, and the control device 4 can control the operation of the second heating element 18; the second temperature detection device is equipped with a thermistor element, and the control device 4 can obtain heating temperature data by detecting changes in the current parameters of the power supply circuit.

[0059] See Figures 3 to 5 The first upper cover 10 includes an outer cover body 11, a mounting frame 12, and an inner cover body 13. The lower part of the outer cover body 11 is provided with a mounting cavity 14. The inner cover body 13 and the mounting frame 12 are installed into the mounting cavity 14 from bottom to top. The lower part of the inner cover body 13 is provided with a heating cavity 15. The second heating element 18 is installed into the heating cavity 15. The blower mechanism passes through the outer cover body 11, the mounting frame 12, and the inner cover body 13.

[0060] The above-mentioned arrangement has two advantages: firstly, the mounting frame 12 facilitates the installation of components and reduces assembly difficulty; secondly, the mounting frame 12 provides heat insulation, improving the safety of users when operating this invention.

[0061] See Figures 3 to 5 A first airflow channel 16 is provided between the mounting frame 12 and the inner cover 13, and a first air hole 17 is provided on the side wall of the heating chamber 15; the blower mechanism includes a drive motor 19, a first fan blade 20 and a second fan blade 21. The blower mechanism is set on the outer cover 11, and its output end is inserted into the mounting frame 12 and the inner cover 13. The first fan blade 20 is located between the mounting frame 12 and the inner cover 13, and the second fan blade 21 is located in the heating chamber 15 and above the second heating element 18. The drive motor 19 can drive the first fan blade 20 and the second fan blade 21 to work.

[0062] The above setup method has the following beneficial effects:

[0063] (1) In this invention, since the inner cover 13 contacts the second heating element 18, the inner cover 13 will transfer heat to the drive motor 19. The setting of the first fan blade 20 can drive the air flow between the mounting frame 12 and the inner cover 13, thereby cooling the inside of the first upper cover 10, preventing heat accumulation, and improving the safety of the user when holding or disassembling the first upper cover 10.

[0064] (2) In this invention, a first airflow channel 16 is provided between the mounting frame 12 and the inner cover 13, and a first air hole 17 is provided on the side wall of the heating chamber 15. While the first fan blade 20 drives the air flow between the mounting frame 12 and the inner cover 13, it can make the air pressure in the first airflow channel 16 greater than the air pressure in the heating chamber 2, so that the heated air in the first airflow channel 16 flows into the heating chamber 2 through the first air hole 17, realizing heat recovery and utilization, accelerating the heating speed of the heating chamber 2, and saving energy and protecting the environment.

[0065] (3) In this invention, the second fan blade 21 is used to drive the air flow in the heating chamber 2 so that the temperature in the heating chamber 2 is relatively uniform, thereby ensuring that the food is heated evenly. The first fan blade 20 and the second fan blade 21 are driven by the drive motor 19 (the drive motor 19 drives the first fan blade 20 and the second fan blade 21 to rotate in the forward direction to generate a downward airflow). The design is ingenious and the energy utilization efficiency is high.

[0066] See Figure 5 The first vent 17 is located at the lower end of the inner cover 13.

[0067] The above configuration allows the air flowing out of the first vent 17 to diffuse evenly from the center of the heating chamber 2 to the surrounding area, thereby improving the efficiency of heat utilization.

[0068] See Figures 4 to 5 The inner cover 13 is provided with an oil baffle 22 on the inner side of the lower part, which is adapted to the upper opening of the pot body 9. The oil baffle 22 is provided with a second air hole 23 corresponding to the first air hole 17.

[0069] The oil-blocking component 22 serves two purposes: firstly, it can press down on the pot body 9, improving the stability of the pot body 9 in the heating chamber 2; secondly, it can prevent the oil produced during cooking from entering the first vent 17 and clogging the first vent 17, thus increasing the difficulty of cleaning.

[0070] See Figures 5 to 6 A distance is left between the oil baffle 22 and the first air hole 17, and a gap is left between the pot body 9 and the heating chamber 2 to form a second airflow channel 7; a gap is left between the first heating element 3 and the heating chamber 2 to form a third airflow channel 8, and the second airflow channel 7 and the third airflow channel 8 are connected.

[0071] The oil baffle 22 can guide the airflow from the first vent 17, directing part of the airflow from the first vent 17 to the second airflow channel 7. The airflow then flows through the second airflow channel 7 to the third airflow channel 8, thereby allowing the heat generated by the present invention to flow between the first upper cover 10 and the heating cavity 2, making the heat in the space between the first upper cover 10 and the heating cavity 2 more uniform, thereby improving the cooking effect.

[0072] See Figure 9 It also includes a second cover 32, and the first cover 10 and the second cover 32 can be selected to cover the opening of the heating chamber 2.

[0073] For cooking where only the first heating element 3 is used, to avoid increasing the user's fatigue due to the excessive weight of the first top cover 10, the second top cover 32 can be used to cover the opening of the heating cavity 2, thereby reducing the difficulty of operation of the present invention and enabling the switching of multiple cooking methods.

[0074] See Figure 2 , Figure 3 , Figure 7 and Figure 8 The first upper cover 10 is detachably connected to the base 1; the connection structure 24 includes a connection seat 25 disposed on the side of the base 1, and a connection groove 26 disposed on the first upper cover 10 corresponding to the connection seat 25. The connection seat 25 is provided with a first power supply connection end 27 for connecting a power supply device, and the connection groove 26 is provided with a second power supply connection end 28 adapted to the first power supply connection end 27.

[0075] The first top cover 10 and the base 1 are detachable, so that when the user removes the first top cover 10, only the first heating element 3 on the base 1 is used to heat the pot body 9 for cooking; by setting the second power supply connection terminal 28 to be electrically connected to the first power supply connection terminal 27, the power supply device on the base 1 can supply power to the first top cover 10 and the control device 4 can control the second heating element 18 to work.

[0076] See Figure 3 and Figure 7 A fixing component is provided between the connecting seat 25 and the connecting groove 26. The fixing component includes a protrusion 29 disposed on the connecting seat 25 and a groove 30 disposed on the connecting groove 26 corresponding to the protrusion 29. As a simple alternative, the fixing component includes a protrusion 29 disposed on the connecting groove 26 and a groove 30 disposed on the connecting seat 25 corresponding to the protrusion 29.

[0077] By setting a fixing component, the connection seat 25 and the connection groove 26 are securely connected, thus preventing the second heating element 18 from malfunctioning due to the separation of the connection seat 25 and the connection groove 26 during the user's cooking process.

[0078] See Figure 3 The fixing component is located on the periphery of the first power supply connection terminal 27.

[0079] The above configuration can improve the stability of the connection between the first power supply connection terminal 27 and the second power supply connection terminal 28, and prevent the first power supply connection terminal 27 and the second power supply connection terminal 28 from becoming loose.

[0080] See Figure 3 The connecting groove 26 is rectangular, and the fixing components are located at the four corners of the connecting groove 26.

[0081] The above-mentioned arrangement allows the four corners to be fixed first when connecting the connector 25 and the connector slot 26, and then the first power supply connector 27 and the second power supply connector 28 are connected, which improves the convenience of installation and ensures that the first power supply connector 27 and the second power supply connector 28 are connected smoothly.

[0082] See Figure 3 and Figure 7 The connecting seat 25 and / or the connecting groove 26 are provided with a plurality of limiting ribs 31. In this embodiment, both the connecting seat 25 and the connecting groove 26 are provided with a plurality of limiting ribs 31.

[0083] The setting of the limiting rib 31 can prevent the mounting surface of the connector 25 and the mounting surface of the connector groove 26 from fitting too tightly, which would make it impossible to remove the first top cover 10 according to the user's needs.

[0084] See Figure 3 The connecting seat 25 is hinged to the side of the base 1.

[0085] The above-described configuration allows the connecting seat 25 to be flipped relative to the base 1. After the user removes the first top cover 10, flipping the connecting seat 25 down prevents it from interfering with the user's cooking using the base 1.

[0086] The power supply device includes a power supply control element and a power supply line, and the control device 4 includes an operation panel 5 and a display screen 6.

[0087] Compared with the prior art, the multifunctional cooking appliance of the present invention has the following beneficial effects:

[0088] (1) The multifunctional cooking appliance of the present invention has a first heating element 3 on the base 1 and a second heating element 18 on the first upper cover 10, so that the lower and upper parts of the pot body 9 can be heated so that the upper and lower sides of the food can be heated. This allows the user to complete the cooking process without having to flip the food, avoiding the situation of burning the food, thereby improving the user's cooking experience.

[0089] (2) The multifunctional cooking appliance of the present invention has a first heating element 3 on the base 1 and a second heating element 18 on the first upper cover 10, so that the user can choose to activate the first heating element 3 and the second heating element 18 at the same time to heat the bottom and top of the pot body 9 simultaneously, or choose to activate the first heating element 3 and the second heating element 18 intermittently to heat the bottom and top of the pot body 9 alternately, or choose to activate only the first heating element 3 or the second heating element 18 to heat the bottom or top of the pot body 9, so that the user can choose the corresponding heating method to heat the food according to the actual needs, and realize the cooking of the food in the pot body 9 by multiple heating methods to meet people's different cooking preferences and cooking needs;

[0090] (3) In this invention, the control device 4 can obtain the heating temperature data in the heating cavity 2 through the first temperature detection device and the second temperature detection device, thereby ensuring that the heating temperature data in the heating cavity 2 can be accurately obtained regardless of the heating method used by the user for cooking, and avoiding large errors in heating temperature data detection caused by the temperature detection device being too far away from the heating element due to the use of different heating methods during cooking.

[0091] Example 2

[0092] Another object of the present invention is to provide a method of using the multifunctional cooking appliance of Embodiment 1, comprising:

[0093] Set cooking parameters: Operate the control device to select the menu, set the cooking temperature, and set the cooking time;

[0094] Execute the cooking settings: Preheat the pot, add the ingredients, and begin cooking.

[0095] When performing the cooking setting, heating is performed using the first heating element and / or the second heating element.

[0096] Compared with the prior art, the method of using the multifunctional cooking appliance of the present invention involves using a multifunctional cooking appliance equipped with an upper heating element (second heating element) and a lower heating element (first heating element) to cook food, which makes it convenient for users to use different heating methods to heat food according to actual conditions, so as to meet different cooking preferences and cooking needs.

[0097] The heating process of a multi-functional cooking appliance is as follows:

[0098] In one embodiment, when performing the cooking setup, either by not using a first top cover to seal the opening of the heating cavity or by using a second top cover to seal the opening of the heating cavity:

[0099] The control device is set to obtain heating temperature data based on the first temperature detection device;

[0100] When preheating the pot body, the first heating element is used for heating;

[0101] When cooking ingredients, the control device controls the first heating element to heat up to the set cooking temperature W1 and maintains the heating.

[0102] When the first heating element maintains heating, if the first temperature detection device detects that the heating temperature is greater than or equal to C, then the first heating element continues to heat for T1 seconds, stops working for T2 seconds, and continues to heat for T3 seconds. The above steps are repeated to achieve the cyclic heating of the first heating element until the cooking is finished, where 5≤T1, T2, T3≤60, and T1<T2<T3.

[0103] When preheating the pot and cooking the ingredients, the first heating element and the blower mechanism are working.

[0104] If the control device determines that the heating temperature detected by the first temperature detection device is greater than 150-180℃ (preferably 150℃), it disconnects the power supply to the first heating element to provide over-temperature protection; if the control device determines that the heating temperature detected by the first temperature detection device is lower than 150℃, it restores the power supply to the first heating element.

[0105] If the opening of the heating chamber is sealed with the first cover, and the control device obtains the heating temperature data according to the first temperature detection device, the pot body is mainly heated by the first heating element. At this time, the blower mechanism is activated. On the one hand, it can make the heat of the heating chamber more uniform and improve the cooking effect. On the other hand, it can increase the gas flow speed of the heating chamber and avoid heat accumulation around the first heating element.

[0106] In another implementation, the opening of the heating chamber is sealed with a first top cover when performing the cooking setup:

[0107] The control device is set to obtain heating temperature data based on the first temperature detection device;

[0108] When preheating the pot body, the first heating element is used for heating;

[0109] When cooking ingredients, the control device controls the first heating element to heat up to the set cooking temperature W1 and maintains the heating.

[0110] When the first heating element maintains heating, if the first temperature detection device detects that the heating temperature is greater than or equal to C, then the first heating element continues to heat for T1 seconds, stops working for T2 seconds, and continues to heat for T3 seconds. The above steps are repeated to achieve the cyclic heating of the first heating element until the cooking is finished, where 5≤T1, T2, T3≤60, and T1<T2<T3.

[0111] When preheating the pot and cooking the ingredients, the first heating element and the blower mechanism are working.

[0112] If the control device determines that the heating temperature detected by the first temperature detection device is greater than 150-180℃ (preferably 150℃), it disconnects the power supply to the first heating element to provide over-temperature protection; if the control device determines that the heating temperature detected by the first temperature detection device is lower than 150℃, it restores the power supply to the first heating element.

[0113] In another implementation, the opening of the heating chamber is sealed with a first top cover when performing the cooking setup:

[0114] The control device is set to obtain heating temperature data based on the second temperature detection device;

[0115] When preheating the pot body, a second heating element is used for heating;

[0116] When cooking ingredients, the control device controls the second heating element to heat up to the set cooking temperature W1 and maintain it for T4 seconds before stopping; the control device controls the first heating element to heat up to the set cooking temperature W1 and maintain it for T5 seconds before stopping; the above steps are repeated to achieve alternating heating of the second heating element and the first heating element until the cooking is finished, where 5≤T4, T5≤60, and T4>T5; during the heating process of the first heating element, the first temperature detection device works to detect the heating temperature of the first heating element;

[0117] The blower mechanism operates when the pot is preheated and the ingredients are being cooked.

[0118] If the control device determines that the heating temperature detected by the second temperature detection device is greater than 260-280℃ (preferably 270℃), it disconnects the power supply to the second heating element to provide over-temperature protection; if the control device determines that the heating temperature detected by the second temperature detection device is lower than 250℃, it restores the power supply to the second heating element.

[0119] In another implementation, the opening of the heating chamber is sealed with a first top cover when performing the cooking setup:

[0120] The control device is set to obtain heating temperature data based on the second temperature detection device;

[0121] When preheating the pot body, a second heating element is used for heating;

[0122] When cooking food, the control device controls the second heating element to heat up to the set cooking temperature W1 and then continues to heat for T6 seconds, stops working for T7 seconds, and continues to heat for T8 seconds. The above steps are repeated to achieve the cyclic heating of the second heating element until the cooking is finished, where 5≤T6, T7, T8≤60, and T6<T7<T8; during the heating process of the second heating element, the second temperature detection device works to detect the heating temperature of the second heating element.

[0123] The blower mechanism operates when the pot is preheated and the ingredients are being cooked.

[0124] If the control device determines that the heating temperature detected by the second temperature detection device is greater than 260-280℃ (preferably 270℃), it disconnects the power supply to the second heating element to provide over-temperature protection; if the control device determines that the heating temperature detected by the second temperature detection device is lower than 250℃, it restores the power supply to the second heating element.

[0125] In this invention, since the heating temperature can be detected by a first temperature detection device and a second temperature detection device respectively, but since the temperature detection positions of the first temperature detection device and the second temperature detection device are different, in order to achieve precise temperature control of the multi-functional cooking appliance (avoiding large errors in detection results due to excessive distance between the temperature detection device and the heating point), it is necessary to set corresponding heating methods for the first temperature detection device and the second temperature detection device as the main temperature detection device respectively; wherein, when the first temperature detection device is the main temperature detection device, the first heating element mainly heats the pot body; when the second temperature detection device is the main temperature detection device, the second heating element mainly heats the pot body, and the first heating element assists in heating the pot body, and the two work intermittently to alternately heat the pot body; this invention enables the multi-functional cooking appliance to realize multiple functions such as steaming, boiling, and frying by flexibly using the first heating element and the second heating element to heat the food. For example, if the first top cover is used to seal the opening of the heating cavity and the second heating element is used to heat the food, the multi-functional cooking appliance can realize the air-frying function of an air fryer. If the top and bottom are heated simultaneously, the food can be fried on both sides, so that the food is heated evenly.

[0126] After the pot body is preheated, if no food is being cooked, it is determined whether the set cooking temperature W1 is higher than the preset heat preservation temperature W2. If W1 > W2, the first and second heating elements are kept at temperature W2; otherwise, they are kept at temperature W1. The first and second heating elements stop working after holding at temperature T0 seconds. In this embodiment, the preset heat preservation temperature W2 is 160-170℃, specifically 150℃.

[0127] The above settings ensure that the pot maintains a reasonable temperature after preheating with low power before cooking the ingredients.

[0128] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A multi-functional cooking appliance, characterized in that, include: The base is provided with an open heating chamber, a first heating element, a first temperature detection device, a power supply device and a control device. The first heating element is installed in the heating chamber. The power supply device is electrically connected to the first heating element. The first temperature detection device, the first heating element and the control device are communicatively connected. The control device can obtain heating temperature data through the first temperature detection device. The pot body is located inside the heating chamber; The first upper cover seals the opening of the heating chamber and is equipped with a blower mechanism, a second heating element, a second temperature detection device and a power supply circuit. The second heating element is located on the lower end face of the first upper cover. The blower mechanism and the second heating element are electrically connected to the power supply circuit. The blower mechanism is used to output airflow to the second heating element and direct it to the heating chamber. A connection structure is provided between the base and the first upper cover to realize the electrical connection between the power supply device and the power supply circuit; When the first top cover and the base are connected by a connecting structure, the power supply device supplies power to the power supply circuit, and the control device can control the operation of the second heating element. The second temperature detection device is equipped with a thermistor element, and the control device can obtain heating temperature data by detecting changes in the current parameters of the power supply circuit. The first cover includes an outer cover body, a mounting frame, and an inner cover body. The lower part of the outer cover body is provided with a mounting cavity. The inner cover body and the mounting frame are installed into the mounting cavity from bottom to top. The lower part of the inner cover body is provided with a heating cavity. The second heating element is installed into the heating cavity. The blower mechanism passes through the outer cover body, the mounting frame, and the inner cover body. A first airflow channel is provided between the mounting frame and the inner cover, and a first air hole is provided on the side wall of the heating chamber; The inner cover body is provided with an oil-blocking component on the inner side of the lower part, which is adapted to the upper opening of the pot body. The oil-blocking component is provided with a second air hole corresponding to the first air hole. A distance is left between the oil baffle and the first air hole, and a gap is left between the pot body and the heating chamber to form a second airflow channel; a gap is left between the first heating element and the heating chamber to form a third airflow channel, and the second airflow channel and the third airflow channel are connected.

2. The multifunctional cooking appliance according to claim 1, characterized in that, The blower mechanism includes a drive motor, a first fan blade, and a second fan blade. The blower mechanism is mounted on the outer cover, and its output end is inserted into the mounting frame and the inner cover. The first fan blade is located between the mounting frame and the inner cover, and the second fan blade is located inside the heating cavity and above the second heating element. The drive motor can drive the first fan blade and the second fan blade to work.

3. The multifunctional cooking appliance according to claim 1, characterized in that, The first vent is located at the lower end of the inner cover.

4. The multifunctional cooking appliance according to claim 1, characterized in that, The first top cover is detachably connected to the base; the connection structure includes a connecting seat disposed on the side of the base, and a connecting groove disposed on the first top cover corresponding to the connecting seat. The connecting seat is provided with a first power supply connection end for connecting a power supply device, and the connecting groove is provided with a second power supply connection end adapted to the first power supply connection end.

5. The heating method of the multifunctional cooking appliance according to any one of claims 1 to 4, characterized in that, include: When executing cooking settings: If the control device is set to obtain heating temperature data based on the first temperature detection device; When preheating the pot body, the first heating element is used for heating; When cooking ingredients, the control device controls the first heating element to heat up to the set cooking temperature W1 and maintains the heating. When the first heating element maintains heating, if the first temperature detection device detects that the heating temperature is greater than or equal to C, then the first heating element continues to heat for T1 seconds, stops working for T2 seconds, and continues to heat for T3 seconds. The above steps are repeated to achieve the cyclic heating of the first heating element until the cooking is finished, where 5≤T1, T2, T3≤60, and T1<T2<T3. If the control device is set to obtain heating temperature data based on the second temperature detection device; When preheating the pot body, a second heating element is used for heating; When cooking ingredients, the control device controls the second heating element to heat up to the set cooking temperature W1 and maintain it for T4 seconds before stopping; the control device controls the first heating element to heat up to the set cooking temperature W1 and maintain it for T5 seconds before stopping; the above steps are repeated to achieve alternating heating of the second heating element and the first heating element until the cooking is finished, where 5≤T4, T5≤60, and T4>T5; during the heating process of the first heating element, the first temperature detection device works to detect the heating temperature of the first heating element.

6. The heating method according to claim 5, characterized in that, When executing cooking settings: If the opening of the heating chamber is sealed with the first top cover, and a setting control device is set to obtain heating temperature data according to the first temperature detection device; When preheating the pot and cooking the ingredients, the first heating element and the blower mechanism work.

7. The heating method according to claim 5, characterized in that, After the pot body is preheated, if no food is being cooked, it is determined whether the set cooking temperature W1 is higher than the preset heat preservation temperature W2. If W1 > W2, the first heating element and the second heating element are kept warm at temperature W2; otherwise, the first heating element and the second heating element are kept warm at temperature W1. The first heating element and the second heating element stop working after being kept warm for T0 seconds. The preset heat preservation temperature W2 is 160-170℃.

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