Cooking device

Abstract

The invention provides a cooking device which comprises a first heating device at least partially arranged in a fan cavity to heat air in the fan cavity; a steam outlet of the steam generator is communicated with the cooking cavity so that steam can enter the cooking cavity; the controller is configured to control the first heating device to work when the air temperature of the cooking cavity is lower than a first preset temperature, and control the first heating device to stop when the air temperature of the cooking cavity reaches the first preset temperature; controlling the steam generator to work at a first duty ratio; after the steam generator works for a first preset time, the first heating device is kept running so that the temperature in the cooking cavity can rise to a second preset temperature, the steam generator is controlled to work at a second duty ratio so as to reduce the humidity in the cooking cavity, and the second duty ratio is smaller than the first duty ratio. By combining the nutritional characteristics of anthocyanin in vegetable food materials and through a cooking curve of segmented temperature control and steam control, damage to anthocyanin in vegetables is reduced, and the retention rate of anthocyanin after cooking is increased.

Description

Technical Field

[0001] The present invention relates to the field of kitchen equipment, and in particular to a cooking device. Background Art

[0002] The cooking device may include a box shell, an inner pot and a heating device. A cooking cavity is provided in the inner pot. The heating device is provided in the inner pot to heat the air in the inner pot. Food to be cooked is placed in the cooking cavity to cook the food.

[0003] A fan cavity may also be formed in the inner pot, and the oven may further include a fan, which is arranged in the fan cavity and can be connected to the cooking cavity. The fan can drive air to circulate in the cooking cavity and the fan cavity, so that heat can be evenly distributed in the cooking cavity.

[0004] Currently, cooking devices do not have a special mode for steaming vegetables. When using a cooking device to steam vegetables, the vegetables are usually steamed in a conventional steaming mode, which can easily cause the vegetables to turn yellow. In addition, anthocyanins in the vegetables are easily lost, resulting in poor quality of the vegetables and low nutrition. Therefore, the present application proposes a cooking device. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To this end, according to an embodiment of the present disclosure, a cooking device is proposed, comprising:

[0007] box shell;

[0008] The inner pot is arranged in the box shell; a cooking cavity is formed in the inner pot;

[0009] The fan cavity is located inside the inner tank;

[0010] An air inlet, used to connect the fan cavity and the cooking cavity;

[0011] An air outlet is used to connect the fan cavity and the cooking cavity;

[0012] a fan disposed in the fan cavity so that air in the cooking cavity flows into the fan cavity through the air inlet and then flows back into the cooking cavity through the air outlet;

[0013] a first heating device, at least partially disposed in the fan cavity to heat the air in the fan cavity;

[0014] a detection device, at least partially disposed in the cooking cavity to detect the air temperature and air humidity in the cooking cavity;

[0015] A steam generator is disposed in the box shell and outside the inner pot, the steam generator is used to generate steam, and a steam outlet of the steam generator is connected to the cooking cavity so that steam enters the cooking cavity;

[0016] a controller connected to the first heating device, the fan, the detection device and the steam generator;

[0017] The controller is configured as:

[0018] Acquiring the cooking cavity air temperature and the cooking cavity air humidity detected by the detection device;

[0019] In the first mode, when the air temperature of the cooking cavity is lower than a first preset temperature, the first heating device is controlled to operate, and when the air temperature of the cooking cavity reaches the first preset temperature, the first heating device is controlled to stop; and the steam generator is controlled to operate at a first duty cycle;

[0020] After working for a first preset time, the operating frequency of the first heating device is increased to raise the temperature in the cooking cavity to a second preset temperature, and the steam generator is controlled to operate at a second duty cycle to reduce the humidity in the cooking cavity, wherein the second duty cycle is smaller than the first duty cycle.

[0021] In the above, by optimizing the temperature and humidity control during the cooking process, the retention of anthocyanins in the ingredients is ensured, which helps to improve the nutritional quality and taste of the food.

[0022] By acquiring the air temperature in the cooking chamber, the system precisely adjusts the temperature to the desired level, preventing anthocyanins from becoming unstable and degrading at high temperatures. Furthermore, by acquiring the air humidity in the cooking chamber, the system precisely adjusts the humidity to the desired level, and adjusts the steam generator accordingly to prevent anthocyanins from dissolving in water and causing excessive loss. This prevents yellowing of ingredients, resulting in a better appearance and high user sensory ratings. This ensures compatibility between the nutritional properties of anthocyanins and user sensory evaluations.

[0023] According to an embodiment of the present disclosure, the controller is configured to: control the first heating device to heat the cooking chamber to a first preset temperature, control the steam generator to operate at a first duty cycle, and control the fan to turn on after the steam generator has operated for a first preset time. This reduces the humidity in the cooking chamber, making anthocyanins less soluble in water and thus less likely to be lost.

[0024] According to an embodiment of the present disclosure, the controller is configured to, after controlling the steam generator to operate at a second duty cycle for a second preset time, reduce the operating frequency of the first heating device or turn off the first heating device to reduce the temperature in the cooking cavity.

[0025] The ingredients are dried at low temperature through the above steps. Low temperature drying can reduce the moisture on the surface of the ingredients, making anthocyanins less soluble in water and avoiding excessive loss.

[0026] According to an embodiment of the present disclosure, the controller is configured to control the steam generator to operate at a second duty cycle for a second preset time and then turn off the steam generator, thereby reducing the humidity in the cooking chamber, making anthocyanins less soluble in water and preventing excessive loss.

[0027] According to an embodiment of the present disclosure, the controller is configured to:

[0028] In response to user input of a cooking mode, a target temperature, and a cooking time instruction, the first heating device and the steam generator are activated.

[0029] In some embodiments, the temperature and humidity of the cooking chamber are adjusted at different stages according to the cooking mode input by the user to meet the cooking requirements of different ingredients, thereby achieving precise cooking.

[0030] According to an embodiment of the present disclosure, a cooking device includes:

[0031] Voice module, connected to the controller;

[0032] The controller is configured as:

[0033] After receiving the cooking mode, target temperature and cooking time instructions input by the user, the voice module is controlled to play the sound.

[0034] According to an embodiment of the present disclosure, a cooking cavity opening is provided at the front end of the cooking cavity, and the cooking device includes:

[0035] A door for opening or closing the cooking chamber opening;

[0036] The controller is configured as:

[0037] In response to the instruction of the door to close the cooking cavity opening, the first heating device is controlled to operate, the steam generator is controlled to operate at a first duty cycle, and the first heating device and the steam generator immediately enter the next stage after operating for a first preset time.

[0038] An instruction is set to respond to the oven door closing the cooking cavity opening, control the first heating device to operate, and control the steam generator to operate at a certain duty cycle, so that the air temperature and air humidity in the cooking cavity are quickly restored, reducing the impact of opening the oven door on the air temperature and air humidity in the cooking cavity, better protecting anthocyanins, and shortening the cooking time.

[0039] According to an embodiment of the present disclosure, the controller is configured to:

[0040] In response to the input cooking mode, target temperature and cooking time command, the sum of the durations of the first preset time, the second preset time and the third preset time is the cooking time.

[0041] According to an embodiment of the present disclosure, a cooking device is further provided, comprising:

[0042] box shell;

[0043] The inner pot is arranged in the box shell; a cooking cavity is formed in the inner pot, and a cooking cavity opening is provided at the front end of the cooking cavity;

[0044] A door for opening or closing the cooking chamber opening;

[0045] The fan cavity is located inside the inner tank;

[0046] The air inlet connects the fan cavity and the cooking cavity;

[0047] The air outlet connects the fan cavity and the cooking cavity;

[0048] a fan disposed in the fan cavity so that air in the cooking cavity flows into the fan cavity through the air inlet and then flows back into the cooking cavity through the air outlet;

[0049] a first heating device, at least partially disposed in the fan cavity to heat the air in the fan cavity;

[0050] a detection device, at least partially disposed in the cooking cavity to detect the air temperature and air humidity in the cooking cavity;

[0051] A steam generator is disposed in the box shell and outside the inner pot, the steam generator is used to generate steam, and a steam outlet of the steam generator is connected to the cooking cavity so that steam enters the cooking cavity;

[0052] a controller connected to the first heating device, the fan, the detection device and the steam generator;

[0053] The controller is configured to: obtain the cooking cavity air temperature and the cooking cavity air humidity detected by the detection device;

[0054] In the first mode, the first heating device is controlled to operate so that the temperature in the cooking cavity reaches a second preset temperature, and the steam generator is controlled to operate;

[0055] After working for a second preset time, the working frequency of the first heating device is reduced or the first heating device is turned off to reduce the temperature of the cooking cavity; the steam generator is turned off and the fan is controlled to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 is a front view of a partial structure of a cooking device according to an embodiment of the present application;

[0057] Figure 2 is a side view of a partial structure of a cooking device according to an embodiment of the present application;

[0058] Figure 3 is a partial structural perspective diagram of a cooking device according to an embodiment of the present application;

[0059] Figure 4 is a partial structural diagram of a cooking device according to an embodiment of the present application;

[0060] Figure 5 is a front view of a partial structure of a cooking device according to an embodiment of the present application from another perspective;

[0061] Figure 6 is a partial structural cross-sectional view of a cooking device according to an embodiment of the present application;

[0062] Figure 7 is a partial structural diagram of a cooking device according to an embodiment of the present application from another perspective;

[0063] Figure 8 is a partial structural diagram of a cooking device according to an embodiment of the present application from another perspective;

[0064] Figure 9 is a partial structural diagram of a cooking device according to an embodiment of the present application from another perspective;

[0065] Figure 10 is a partial structural diagram of a cooking device according to an embodiment of the present application from another perspective;

[0066] Figure 11 is a partial structural diagram of a cooking device according to an embodiment of the present application from another perspective;

[0067] Figure 12 is a partial structural diagram of a cooking device according to an embodiment of the present application from another perspective;

[0068] Figure 13 is a partial structural diagram of a cooking device according to an embodiment of the present application from another perspective;

[0069] Figure 14 is a partial connection diagram of a cooking device according to an embodiment of the present application;

[0070] Figure 15 is a diagram showing changes in temperature within a cooking cavity according to an embodiment of the present application;

[0071] Figure 16 is a diagram showing a change in the duty cycle of a steam generator according to an embodiment of the present application;

[0072] Figure 17 This is the control logic of the cooking process of the cooking device according to the embodiment of the present application.

[0073] In the above figures: cooking device 100; box shell 1; inner pot 2; cooking cavity 21; cooking cavity opening 211; inner pot rear wall 22; inner pot top wall 23; inner pot bottom wall 24; box door 3; fan cover 4; fan cavity 40; air inlet 41; air outlet 42; fan 5; first heating device 61; first heating part 611; second heating device 62; second heating part 621; third heating device 63; third heating part 631; detection device 71; steam generator 72; water storage box 73; water pump 74; fixing part 75; controller 8. DETAILED DESCRIPTION

[0074] In order to make the purpose and implementation of this application clearer, the exemplary implementation of this application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only part of the embodiments of this application, not all of the embodiments.

[0075] It should be noted that the brief descriptions of terms in this application are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0076] In the specification and claims of this application and the accompanying drawings, the terms "first," "second," "third," etc. are used to distinguish similar or similar objects or entities, and are not necessarily intended to limit a particular order or sequence, unless otherwise noted. It should be understood that the terms used in this manner are interchangeable under appropriate circumstances.

[0077] The terms "comprise," "comprises," and "having," and any variations thereof, are intended to cover but not exclude inclusion; for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0078] The present application proposes a cooking device 100 , which will be described below with reference to the accompanying drawings.

[0079] refer to Figures 1-4 The cooking device 100 may include a housing 1. The housing 1 may be used to protect components located inside the housing 1.

[0080] The height direction of the housing 1 can be from the bottom to the top of the housing 1. The housing 1 can have a length direction. The length direction of the housing 1 can be from one side end to the other side end of the housing 1. The housing 1 can have a front-to-back direction. The front of the housing 1 can be the side of the housing 1 facing the user. Among the height direction, length direction, and front-to-back direction of the housing 1, any two directions are perpendicular to each other.

[0081] refer to Figures 1-4 The cooking device 100 may include an inner container 2. The inner container 2 may be disposed within the housing 1. A cooking cavity 21 may be formed within the inner container 2. The cooking cavity 21 may be a cavity for placing food. A cooking cavity opening 211 may be provided at the front end of the cooking cavity to facilitate placing food into or removing food from the cooking cavity.

[0082] refer to Figures 1-4 The oven 100 may include a door 3. The door 3 may be movably connected to the front side of the oven shell. The door 3 may be rotatably connected to the oven shell 1. The door 3 may be located at the front end of the cooking cavity opening and is used to open or close the cooking cavity opening.

[0083] In this application, reference is made to Figure 5-Figure 7 The cooking device may include a fan chamber 40. The fan chamber 40 may be located within the inner container. The cooking device may include an air inlet 41. The air inlet may connect the fan chamber with the cooking chamber. The air inlet may be located within the inner container. The cooking device may include an air outlet 42. The air outlet may connect the fan chamber with the cooking chamber. The air outlet may be located within the inner container.

[0084] In this application, reference is made to Figure 5-Figure 7 The cooking device may include a blower 5. The blower 5 may include a fan. The fan may be arranged in the blower cavity so that the air in the cooking cavity flows into the blower cavity through the air inlet and then flows back to the cooking cavity through the air outlet.

[0085] The blower 5 may include a fan motor. The fan motor may be connected to the fan to drive the fan to rotate. The fan motor drives the fan to rotate so that the air in the cooking cavity flows into the blower cavity through the air inlet and then flows back to the cooking cavity through the air outlet.

[0086] Setting up a fan can establish air circulation between the fan cavity and the cooking cavity, making the air temperature and humidity in each part of the cooking cavity and the fan cavity relatively uniform, avoiding large temperature or humidity differences between two places that are far apart, and avoiding uneven cooking caused by large temperature differences.

[0087] In the present application, the fan may be a centrifugal fan. The centrifugal fan may be disposed opposite the air inlet. Air in the cooking chamber may enter the centrifugal fan through the air inlet along the axial direction of the centrifugal fan and then flow out of the centrifugal fan along the radial direction of the centrifugal fan.

[0088] In this application, there may be multiple air outlets. Multiple air outlets may surround the outside of the air inlet. There may be four air outlets. Each air outlet may have several holes. Each air inlet may have several holes.

[0089] In this application, reference is made to Figure 5-Figure 7The inner container 2 may include an inner container rear wall 22. The inner container rear wall 22 may be provided at the rear end of the inner container.

[0090] The rotating shaft of the fan motor can pass through the rear wall of the inner tank from behind and be inserted into the fan cavity and connected to the fan, so that most of the fan motor is arranged outside the inner tank to avoid the steam or high temperature in the inner tank affecting the fan motor.

[0091] In this application, reference is made to Figure 5-Figure 7 The cooking device 100 may include a fan cover 4. The fan cover 4 may be disposed in the inner pot 2. The fan cover and the inner pot may define a fan cavity 40.

[0092] The fan cover 4 can be located in front of the rear wall of the inner container. The fan cover and the rear wall of the inner container can define a fan cavity. The fan cavity can be located behind the cooking cavity.

[0093] The fan cover plate 4 may be formed with an air inlet 41. The air inlet 41 may connect the fan cavity and the cooking cavity. The air inlet 41 may be an inlet for air to flow from the cooking cavity into the fan cavity.

[0094] The fan cover plate 4 may be formed with an air outlet 42. The air outlet 42 may connect the fan cavity and the cooking cavity. The air outlet 42 may be an outlet for air to flow from the fan cavity to the cooking cavity.

[0095] In this application, reference is made to Figures 6-10 The cooking device may include a first heating device 61. The first heating device 61 may be used to heat the air in the fan cavity. The first heating device 61 may be at least partially disposed in the fan cavity.

[0096] refer to Figures 6-10 The first heating device 61 may include a first heating portion 611. The first heating portion may surround the outside of the fan along the circumference of the fan. The first heating portion may be spirally wound into at least two turns.

[0097] The first heating device 61 can heat the air after it flows out from the centrifugal fan, and the heated air flows back to the cooking cavity through the air outlet.

[0098] In this application, reference is made to Figures 6-11 The cooking device may include a second heating device 62. The second heating device may include a second heating portion 621. The second heating portion 621 may be disposed in the cooking cavity. The second heating portion 621 may be disposed at the top of the cooking cavity.

[0099] The second heating portion 621 can heat the air in the cooking cavity. The second heating portion 611 can be a heating wire. The second heating device can be located above the area where the food to be cooked is placed.

[0100] In this application, reference is made to Figure 6-Figure 12 The cooking device may include a third heating device 63. The third heating device 63 may include a third heating portion 631. The third heating portion 631 may be disposed below the inner pot. The third heating portion may be a heating wire.

[0101] The inner container may include an inner container bottom wall 24. The inner container bottom wall may be provided at the bottom end of the inner container. The third heating portion 631 may be provided below the inner container bottom wall.

[0102] In the present application, the cooking device may include a detection device. The detection device may be used to detect the air temperature and air humidity in the cooking cavity. The detection device may be at least partially disposed in the cooking cavity.

[0103] The detection device may include a temperature detection member. The temperature detection member is used to detect the temperature in the cooking cavity. The temperature detection member may be a temperature sensor.

[0104] The temperature detecting element may be at least partially disposed in the cooking cavity to detect the temperature in the cooking cavity.

[0105] In the present application, the inner pot may include an inner pot top wall 23. The inner pot top wall 23 may be provided at the top of the inner pot. The temperature detection member may be connected to the inner pot top wall to better detect the air temperature in the cooking cavity.

[0106] In this application, reference is made to Figure 14 The detection device 71 may include a humidity detection element. The humidity detection element is used to detect the humidity in the cooking cavity. The humidity detection element may be a humidity sensor.

[0107] The humidity detecting element may be at least partially disposed in the cooking cavity to detect the humidity in the cooking cavity.

[0108] In the present application, the detection device may be a temperature and humidity detection element, and the temperature and humidity detection element may be a temperature and humidity sensor. The temperature and humidity sensor may be at least partially disposed in the cooking cavity to detect the temperature and humidity in the cooking cavity.

[0109] In this application, reference is made to Figure 10-13 The cooking device may include a steam generator 72. The steam generator 72 may be disposed within the housing. The steam generator 72 may be disposed outside the inner pot. The steam generator may be disposed behind the inner pot. The steam generator is configured to generate steam to supply steam to the cooking cavity, allowing the cooking device to steam food.

[0110] The steam generator has a steam outlet which is communicated with the cooking cavity so as to pass steam into the cooking cavity.

[0111] In the present application, a steam inlet is provided on the inner pot. The steam inlet is connected to the steam outlet, and the steam inlet is connected to the cooking cavity, so that the steam outlet and the cooking cavity are connected. The steam inlet can be formed on the rear wall of the inner pot, and the steam inlet can be connected to the cooking cavity through the fan cavity.

[0112] In this application, the inner pot is provided with a steam inlet. The steam outlet of the steam generator is connected to a steam outlet pipe, which is inserted into the steam inlet, so that the steam outlet communicates with the fan cavity through the steam outlet pipe. The steam inlet can be formed on the rear wall of the inner pot. The steam outlet pipe can communicate with the fan cavity and the cooking cavity through the steam outlet pipe.

[0113] In this application, reference is made to Figure 10-13 The cooking device may include a water storage box 73 for storing water. The water storage box may be arranged inside the casing. The water storage box may be arranged outside the inner pot. The water storage box may be arranged on the top of the inner pot.

[0114] refer to Figure 10-13 The cooking device may include a water pump 74. The water pump 74 may be located behind the inner pot, with its water inlet connected to the water storage box and its water outlet connected to the steam generator. Utilizing its pumping capacity, the water pump 74 transfers water from the water storage box to the steam generator.

[0115] In this application, reference is made to Figure 10-13 The cooking device may include a fixing member 75. The fixing member is arranged behind the inner pot. The steam generator may be fixed on the fixing member. The water pump may be fixed on the fixing member.

[0116] In this application, reference is made to Figure 14 The cooking device may include a controller 8. The controller 8 may be connected to the fan. The controller 8 may control the rotation and stop of the fan 5.

[0117] The controller 8 may be connected to the first heating device 61. The controller 8 can control the first heating device 61 to operate to heat the air and control the first heating device 61 to stop operating.

[0118] The controller 8 can be connected to the steam generator 72. The controller 8 can control the steam generator 72 to work and control the steam generator 72 to stop working.

[0119] When the steam generator 72 is working, the steam generator 72 works at a certain duty cycle. The duty cycle of the steam generator 72 is the ratio of the working time of the steam generator 72 in one cycle to the total time in one cycle. The total time in one cycle is the sum of the working time of the steam generator 72 in one cycle and the stop time of the steam generator 72 in one cycle.

[0120] The controller 8 can be connected to the detection device 71 , and the controller 8 can obtain the humidity and temperature of the air in the cooking cavity detected by the detection device 71 .

[0121] The cooking device may have a first mode, wherein when the cooking device is in the first mode, the vegetables can be steamed and the vegetables can be kept green with minimal loss of anthocyanins. The first mode may also be an anthocyanin retention mode.

[0122] In the present application, the controller 8 may be configured to obtain the cooking cavity air temperature and the cooking cavity air humidity detected by the detection device 71 .

[0123] In some embodiments, when the air temperature of the cooking cavity is lower than a first preset temperature, the first heating device 61 is controlled to work; when the air temperature of the cooking cavity reaches the first preset temperature, the first heating device 61 is controlled to stop.

[0124] It is set within a first preset time, when the air temperature of the cooking cavity is lower than the first preset temperature, the first heating device 61 is controlled to work, and when the air temperature of the cooking cavity reaches the first preset temperature, the first heating device 61 is controlled to stop, so that the temperature in the cooking cavity can be controlled, that is, the temperature of the cooking cavity is controlled, which can make the temperature in the cooking cavity around the first preset temperature, reduce the destruction and loss of activity of anthocyanins in the food, maintain the color of the vegetables, avoid the color of the vegetables from becoming lighter or fading, and make the appearance effect good and the sensory score high.

[0125] The temperature in the cooking cavity is controlled to reach the first preset temperature within the first preset time, thereby preventing the anthocyanins from being destroyed due to excessively high temperature in the cooking cavity and ensuring the retention of anthocyanins in the vegetables.

[0126] The first preset temperature is T1, where T1 ≥ the third parameter value. The third parameter value can be any value between 45-55°C to prevent the first preset temperature from being too low, which would result in an excessively long cooking time. T1 ≤ the fourth parameter value. The fourth parameter value can be any value between 68-75°C to prevent the first preset temperature from being too high, which would cause anthocyanin to be destroyed and oxidized, leading to discoloration of the food.

[0127] In some embodiments, the steam generator 72 is controlled to operate at a first duty cycle for a first preset time.

[0128] During the first preset time, the steam generator 72 is controlled to maintain the humidity in the cooking chamber within a set range. Appropriate temperature and humidity levels dissolve the pigments in the vegetable cells. In this mode, the door closes the cooking chamber opening. To prevent excessive steam leakage, the cooking chamber is relatively enclosed. In this relatively enclosed environment, when the humidity is within the set range, the oxygen content within the cooking chamber is low. In this oxygen-deficient environment, anthocyanin degradation is minimal. Therefore, within the first preset time, yellowing of the ingredients is avoided and anthocyanin degradation is minimized, ensuring both the appearance and nutritional value of the ingredients are maintained.

[0129] The first duty cycle is greater than the first parameter value, and the first parameter value can be any value between 1 / 4 and 3 / 5, so as to avoid the first duty cycle being too small, which causes the humidity in the cooking cavity to increase too slowly.

[0130] The first duty cycle is smaller than the second parameter value, and the second parameter value can be any value between 3 / 4 and 1, so as to avoid the first duty cycle being too large, which may cause the humidity in the cooking cavity to increase too quickly.

[0131] In some embodiments, after the first heating device 61 operates for a first preset time or the steam generator 72 operates at a first duty cycle for a first preset time, the operating frequency of the first heating device 61 is increased to raise the temperature in the cooking cavity to a second preset temperature, and the steam generator 72 is controlled to operate at a second duty cycle to reduce the humidity in the cooking cavity, wherein the second duty cycle is smaller than the first duty cycle.

[0132] The second preset temperature is T2, where T2 ≥ the seventh parameter value. The seventh parameter value can be any value between 95-105°C to prevent the second preset temperature from being too low, which would result in an excessively long cooking time. T2 ≤ the eighth parameter value. The eighth parameter value can be any value between 155-165°C to prevent the second preset temperature from being too high, which would cause anthocyanin to be destroyed and oxidized, leading to discoloration of the food.

[0133] The second duty cycle is greater than the fifth parameter value. The fifth parameter value can be any value between 1 / 7 and 1 / 5 to avoid the second duty cycle being too small, which may result in too low humidity in the cooking chamber at this stage.

[0134] The second duty cycle is less than the sixth parameter value. The sixth parameter value can be any value between 1 / 4 and 1 / 2. Avoid excessively large second duty cycle, which may result in low humidity in the cooking chamber during this stage.

[0135] In the above, by optimizing the temperature and humidity control during the cooking process, the retention of anthocyanins in the ingredients is ensured, which helps to improve the nutritional quality and taste of the food.

[0136] By acquiring the air temperature in the cooking chamber, the temperature inside the cooking chamber is precisely adjusted to the desired level, preventing anthocyanins from becoming unstable and degrading at high temperatures. Furthermore, by acquiring the air humidity in the cooking chamber, the humidity is precisely adjusted to the desired level, and the operation of the steam generator 72 can be adjusted accordingly to prevent anthocyanins from dissolving in water and causing excessive loss. This prevents yellowing of ingredients, resulting in a good appearance and high user sensory ratings. This ensures that the nutritional properties of anthocyanins are compatible with user sensory evaluations.

[0137] In some embodiments, the controller 8 is configured to: control the first heating device 61 to heat the cooking chamber to a first preset temperature; control the steam generator 72 to operate at a first duty cycle; and control the fan 5 to turn on after the steam generator 72 has operated for a first preset time. This reduces the humidity in the cooking chamber, making anthocyanins less soluble in water and thus less likely to be lost.

[0138] According to an embodiment of the present disclosure, the controller 8 is configured to control the steam generator 72 to operate at a second duty cycle for a second preset time, and then reduce the operating frequency of the first heating device 61 or turn off the first heating device 61 to reduce the temperature in the cooking cavity.

[0139] The ingredients are dried at low temperature through the above steps. Low temperature drying can reduce the moisture on the surface of the ingredients, making anthocyanins less soluble in water and avoiding excessive loss.

[0140] After controlling the steam generator 72 to operate at a second duty cycle for a second preset time, the operating frequency of the first heating device 61 is adjusted to bring the temperature of the cooking chamber to a third preset temperature. The cooking chamber temperature is maintained at the third preset temperature for a third preset time to dry the food in the cooking chamber at a low temperature.

[0141] The third preset temperature is T3, where T3 ≥ the ninth parameter value. The ninth parameter value can be any value between 74-78°C, which prevents the third preset temperature from being too low, resulting in undercooked food. The tenth parameter value can be any value between 81-85°C, which prevents the third preset temperature from being too high, which could cause anthocyanin destruction and oxidation, leading to discoloration of the food.

[0142] The following is the anthocyanin retention rate at different first preset temperatures under a certain humidity, see Table 1.

[0143]

[0144] The data in the table above are only experimental data for experimental vegetables in the laboratory. The present application protects the changes in the heating tube. The technical solution protected by the present application is not limited to the parameters of the first preset temperature, the second preset temperature and the third preset temperature.

[0145] In the above table, the anthocyanin content in the food was determined in accordance with the provisions of NY / T2640 in the Technical Requirements and Test Methods for Healthy Cooking Performance of Cooking Devices (T / CNLlC 0105-2023).

[0146] The following is the anthocyanin retention rate obtained by the steam generator 72 at different duty cycles at different stages at a certain temperature, see Table 2.

[0147]

[0148] The data in the above table are only experimental data for specific vegetables in the laboratory. The present application protects the change in the working state of the steam generator 72. The technical solution protected by the present application is not limited to the first preset temperature, the second preset temperature and the third preset temperature.

[0149] In some embodiments, the controller 8 is configured to control the steam generator 72 to operate at a second duty cycle for a second preset time and then turn off the steam generator 72, thereby reducing the humidity in the cooking cavity, making anthocyanins less soluble in water and preventing excessive loss.

[0150] During the third preset time, when the steam generator 72 is not working, the fan 5 is made to work, and the rotation of the fan 5 can be used to form air circulation between the cooking cavity and the fan 5 cavity, so that the temperature and humidity in various places in the cooking cavity are relatively uniform, avoiding local humidity and temperature unevenness, avoiding uneven color of the food caused by local yellowing of the food, and avoiding excessive degradation of anthocyanins in the food.

[0151] In the above, by equipping different steam control programs at different cooking stages and using a three-stage temperature control and steam control cooking curve, it is possible to not destroy the anthocyanins in the vegetables, but also to avoid yellowing of the vegetable surface and ensure sensory evaluation.

[0152] This embodiment proposes a steaming mode that takes into account sensory evaluation, cooking efficiency, and nutrient retention.

[0153] Reference Figure 15 After cooking begins, the first heating device 61 is controlled to operate and heat the cooking cavity to a first preset temperature. This allows for low-temperature cooking at this stage, reducing the oxidative decomposition of anthocyanins at high temperatures and increasing anthocyanin retention.

[0154] After the first heating device 61 operates for a first preset time, the operating frequency of the first heating device 61 is increased to raise the temperature of the cooking chamber to a second preset temperature. Cooking at the second preset temperature allows the ingredients to cook quickly, and the superheated steam has a lower humidity, making anthocyanins less soluble in water and preventing excessive loss.

[0155] After the first heating device 61 has operated for the second preset time in the previous stage, the operating frequency of the first heating device 61 is reduced to lower the temperature of the cooking chamber to a third preset temperature. After the first heating device 61 continues operating for the third preset time, it is turned off. This completes the current cooking stage. This further low-temperature cooking reduces the moisture on the surface of the food, rendering the anthocyanins insoluble in water and preventing excessive loss.

[0156] Reference Figure 16 After cooking starts, the steam generator 72 is first controlled to operate at a first duty cycle.

[0157] The steam generator 72 operates at the first duty cycle for a first preset time, and then is adjusted to operate at the second duty cycle for a second preset time and then turned off.

[0158] In the above steps, the steam generator 72 is first controlled to operate at a first duty cycle to increase the humidity in the cooking cavity and maintain the cooking cavity within a certain humidity range, thereby reducing the dissolution of anthocyanins in water while taking into account cooking needs, thereby improving the retention rate of anthocyanins.

[0159] Then, the steam generator 72 is controlled to operate at a second duty cycle, cooperating with the first heating device 61 and the fan 5 to provide superheated steam with lower humidity, so that the food can be cooked quickly and the cooking time can be reduced.

[0160] And in the last working stage, the steam generator 72 is turned off to achieve the low-temperature drying stage of the food, so as to reduce the moisture on the surface of the food, make the anthocyanin insoluble in water, and avoid excessive loss.

[0161] Reference Figure 16 After cooking starts, the steam generator 72 is first controlled to operate at a first steam frequency for a first preset time, and then the steam generator 72 is controlled to operate at a second steam frequency for a second preset time and then turned off. The first steam frequency is lower than the second steam frequency.

[0162] In some embodiments, the controller 8 is configured to activate the first heating device 61 and the steam generator 72 in response to a cooking mode, a target temperature, and a cooking time instruction input by a user.

[0163] In response to the input of the first mode, target temperature, and cooking time, the first heating device 61 and steam generator 72 are activated, achieving low-temperature heating in the cooking chamber, bringing the temperature and humidity in the cooking chamber to a predetermined level. This maintains a favorable temperature and humidity environment for the ingredients, preventing the anthocyanins in the vegetables from being destroyed by excessive temperatures and significantly improving anthocyanin retention.

[0164] In some embodiments, the temperature and humidity of the cooking chamber are adjusted at different stages according to the cooking mode input by the user to meet the cooking requirements of different ingredients, thereby achieving precise cooking.

[0165] In some embodiments, the cooking device includes a voice module connected to the controller 8 .

[0166] The controller 8 is configured to: upon receiving the cooking mode, target temperature and cooking time instructions input by the user, control the voice module to play a sound. When the user has set the relevant cooking parameters, control the voice module to emit a prompt tone indicating that the settings are completed.

[0167] The cooking device further comprises a display screen. The controller 8 is configured to display information on the display screen to improve the current cooking stage.

[0168] The box can be made of transparent material so that the user can observe the changes in the ingredients during the cooking process. And combined with the current cooking stage shown on the display screen, the user can determine whether the cooking parameters need to be adjusted.

[0169] In some embodiments, the controller 8 is configured to control the first heating device 61 to operate and the steam generator 72 to operate at a first duty cycle in response to an instruction from the oven door to close the cooking cavity opening, and the first heating device 61 and the steam generator 72 to enter the next stage immediately after operating for a first preset time.

[0170] An instruction is set to respond to the oven door closing the cooking cavity opening, control the first heating device 61 to work, and control the steam generator 72 to work at a certain duty cycle, so that the air temperature and air humidity in the cooking cavity are quickly restored, reducing the impact of opening the oven door on the air temperature and air humidity in the cooking cavity, better protecting anthocyanins, and shortening the cooking time.

[0171] In some embodiments, the controller 8 is configured to: in response to the input cooking mode, target temperature and cooking time instruction, the sum of the first preset time, the second preset time and the third preset time is the cooking time.

[0172] The second preset time is not less than the duration of the first preset time. The duration of the second preset time can be 70% of the entire cooking time.

[0173] The first preset time is not less than the third preset time. The first preset time may be 20% of the entire cooking time. The third preset time may be 10% of the entire cooking time.

[0174] It can be known that this application only protects the size relationship between the first preset time, the second preset time and the third preset time. The above parameters are only examples and do not limit the technical solutions in this application.

[0175] In this application, the cooking process includes three stages. The first stage is the temperature rise and humidity control stage, and the working time of the first stage is the first preset time. The second stage is the high-temperature enzyme inactivation stage, and the working time of the second stage is the second preset time. The third stage is the low-temperature drying stage, and the working time of the third stage is the third preset time.

[0176] Reference Figure 17 , explaining the control logic of the cooking process in this application.

[0177] The user selects the first mode on the operation interface and sets the target temperature and cooking time (S1801).

[0178] After the user puts food into the cooking cavity, the temperature in the cooking cavity is detected (S1804).

[0179] The first heating device 61 is controlled to operate (S1802).

[0180] Determining whether the temperature in the cooking cavity reaches a first preset temperature (S1805);

[0181] In step S1805 , if the first preset temperature is reached, step S1806 is executed to stop the first heating device 61 , and then step S1804 is executed.

[0182] In step S1805 , if the first preset temperature has not been reached, step S1802 is executed.

[0183] The steam generator 72 is controlled to operate at a first duty cycle (S1803). In this cooking stage, the low-temperature steam output of the cooking device is maintained to prevent anthocyanins from being destroyed, oxidized and decomposed under high temperature conditions, and then losing their activity.

[0184] After the first preset time has passed, the first heating device 61 is turned on to make the cooking cavity reach a second preset temperature (S1807);

[0185] Controlling the steam generator 72 to operate at a second duty cycle (S1808);

[0186] Turn on fan 5 (S1811). Control fan 5 to lower the humidity in the cooking chamber, reducing the moisture on the surface of the ingredients, making anthocyanins less soluble in water and preventing excessive loss. During this cooking stage, superheated steam is used to quickly cook the ingredients. Furthermore, the lower humidity of superheated steam makes anthocyanins less soluble in water, which could lead to excessive loss.

[0187] After the second preset time has passed, the steam generator 72 is turned off (S1809) to stop sending steam into the cooking cavity, thereby reducing the humidity in the cooking cavity and facilitating drying.

[0188] The first heating device 61 is turned on to make the cooking cavity reach a third preset temperature (S1810).

[0189] After the third preset time has passed, the fan 5 is turned off (S1812).

[0190] In the above, the ratio among the first preset time, the second preset time and the third preset time can be adjusted according to the different types of vegetables and the characteristics of the vegetables themselves.

[0191] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0192] For ease of explanation, the above description has been presented in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations are possible. The above embodiments have been selected and described to better explain the principles and practical applications, thereby enabling those skilled in the art to better utilize the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A cooking device, characterized in that: include: box shell; An inner pot is arranged in the box shell, and a cooking cavity is formed in the inner pot; a fan chamber, located in the inner tank; an air inlet, for connecting the fan cavity and the cooking cavity; an air outlet, for connecting the fan cavity and the cooking cavity; a fan disposed in the fan cavity, so that the air in the cooking cavity flows into the fan cavity through the air inlet and then flows back into the cooking cavity through the air outlet; a first heating device, at least partially disposed in the fan cavity to heat the air in the fan cavity; a detection device, at least partially disposed in the cooking cavity to detect air temperature and air humidity in the cooking cavity; a steam generator disposed in the housing and outside the inner pot, the steam generator being configured to generate steam, the steam outlet of the steam generator being in communication with the cooking cavity so that steam enters the cooking cavity; a controller connected to the first heating device, the fan, the detection device and the steam generator; The controller is configured to: obtain the cooking cavity air temperature and the cooking cavity air humidity detected by the detection device; In the first mode, when the air temperature of the cooking cavity is lower than a first preset temperature, the first heating device is controlled to operate; when the air temperature of the cooking cavity reaches the first preset temperature, the first heating device is controlled to stop; and the steam generator is controlled to operate at a first duty cycle; After working for a first preset time, the operating frequency of the first heating device is increased to raise the temperature in the cooking cavity to a second preset temperature, and the steam generator is controlled to operate at a second duty cycle to reduce the humidity in the cooking cavity, wherein the second duty cycle is smaller than the first duty cycle.

2. The cooking device according to claim 1, wherein: The controller is configured to: control the steam generator to operate at a first duty cycle for a first preset time, and then control the fan to turn on.

3. The cooking device according to claim 1, wherein The controller is configured to, after controlling the steam generator to operate at a second duty cycle for the second preset time, reduce the operating frequency of the first heating device or turn off the first heating device to reduce the temperature in the cooking cavity.

4. The cooking device according to claim 2, wherein: The controller is configured to control the steam generator to operate at a second duty cycle for the second preset time and then turn off the steam generator.

5. The cooking device according to claim 3, wherein: The second preset time is greater than the first preset time.

6. The cooking device according to claim 4, wherein: The controller is configured to, after the steam generator is turned off for a third preset time, turn off the first heating device and turn off the fan.

7. The cooking device according to claim 1, wherein The controller is configured to: The first heating device and the steam generator are activated in response to a cooking mode, a target temperature, and a cooking time instruction input by a user.

8. The cooking device according to claim 7, wherein: include: A voice module connected to the controller; The controller is configured to: After receiving the cooking mode, target temperature and cooking time instructions input by the user, the voice module is controlled to play a sound.

9. The cooking device according to claim 1, wherein: The front end of the cooking cavity is provided with a cooking cavity opening, and the cooking device comprises: A door for opening or closing the cooking cavity opening; The controller is configured to: In response to the instruction of the door to close the cooking cavity opening, the first heating device is controlled to operate, and the steam generator is controlled to operate at a first duty cycle. The first heating device and the steam generator enter the next stage immediately after operating for a first preset time.

10. A cooking device, characterized in that: include: box shell; An inner pot is arranged in the box shell, and a cooking cavity is formed in the inner pot; a fan chamber located in the inner tank; an air inlet, for connecting the fan cavity and the cooking cavity; an air outlet, for connecting the fan cavity and the cooking cavity; a fan disposed in the fan cavity, so that the air in the cooking cavity flows into the fan cavity through the air inlet and then flows back into the cooking cavity through the air outlet; a first heating device, at least partially disposed in the fan cavity to heat the air in the fan cavity; a detection device, at least partially disposed in the cooking cavity to detect air temperature and air humidity in the cooking cavity; a steam generator disposed in the housing and outside the inner pot, the steam generator being configured to generate steam, the steam outlet of the steam generator being in communication with the cooking cavity so that steam enters the cooking cavity; a controller connected to the first heating device, the fan, the detection device and the steam generator; The controller is configured to: obtain the cooking cavity air temperature and the cooking cavity air humidity detected by the detection device; In the first mode, the first heating device is controlled to operate so that the temperature in the cooking cavity reaches a second preset temperature, and the steam generator is controlled to operate; After working for a second preset time, the operating frequency of the first heating device is reduced or the first heating device is turned off to reduce the temperature of the cooking cavity; the steam generator is turned off and the fan is controlled to operate.

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