Steaming oven

Abstract

The controller is configured to control a steam generator to work for a first preset time in response to an instruction that an oven door closes an opening of a cooking cavity in a first mode, and obtain the air humidity of the cooking cavity within a second preset time t2 after the steam generator works for the first preset time t1, when the air humidity of the cooking cavity reaches the first preset humidity, the steam generator is controlled to stop working, and when the air humidity of the cooking cavity is lower than the first preset humidity, the steam generator is controlled to work at a certain duty ratio; within the first preset time t1 when the steam generator works and within the second preset time t2 after the first preset time t1 when the steam generator works, the fan is controlled to be in the working state, the second heating device and the third heating device are controlled to be in the closed state, and the air temperature of the cooking cavity is obtained; controlling the first heating device to be in a closed state, and controlling the first heating device to be in a working state when the air temperature of the cooking cavity is lower than a first preset temperature; the degreasing rate can be improved.

Description

Technical Field

[0001] The invention relates to the field of kitchen equipment, in particular to a steam oven. Background Art

[0002] The steam oven may include a shell and an inner shell, a cooking cavity is arranged in the inner shell, the steam oven may include a steam generator and a heating device, the heating device may heat the air in the cooking cavity, the steam generator may generate steam, and the steam may be introduced into the cooking cavity, so that the steam oven can realize the functions of steaming and baking.

[0003] Steam oven can cook meat, but the fat contained in meat is more, and when edible fat is too much, it will have a poor impact on people's health. At present, some existing steam ovens can remove the fat of meat when roasting meat.

[0004] However, the method of directly roasting meat in a steam oven does not have a high fat removal rate for meat, and when the roasting time is increased, the surface of the meat is easily burnt, and the appearance is not good. There is still a lot of fat inside the meat, and harmful substances are easily produced. Therefore, the present application proposes a steam oven. 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 steam oven is provided, comprising:

[0007] Box shell;

[0008] An inner pot is arranged in the box shell and has a cooking cavity formed therein, wherein a cooking cavity opening is arranged at the front end of the cooking cavity;

[0009] A door, used to open or close the cooking cavity opening;

[0010] A fan chamber, located in the inner tank;

[0011] An air inlet and an air outlet, connecting the fan cavity and the cooking cavity;

[0012] Fan, including:

[0013] 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 to the cooking cavity through the air outlet;

[0014] A first heating device, at least partially disposed in the fan cavity to heat the air in the fan cavity;

[0015] a second heating device, at least partially disposed in the cooking cavity to heat the air in the cooking cavity;

[0016] a third heating device, at least partially disposed below the inner container to heat the air in the inner container;

[0017] A detection device, used to detect the air temperature and air humidity in the cooking cavity;

[0018] 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;

[0019] A controller is connected to the first heating device, the second heating device, the third heating device, the fan, the detection device and the steam generator; the controller is configured as follows:

[0020] In the first mode, in response to an instruction of the door to close the cooking cavity opening, the steam generator is controlled to work for a first preset time t1, and within a second preset time t2 after the steam generator works for the first preset time t1, the air humidity of the cooking cavity is obtained, and when the air humidity of the cooking cavity reaches the first preset humidity, the steam generator is controlled to stop working, and when the air humidity of the cooking cavity is lower than the first preset humidity, the steam generator is controlled to work at a certain duty cycle;

[0021] During the first preset working time t1 of the steam generator and during the second preset time t2 after the first preset working time t1 of the steam generator, the fan is controlled to be in a working state, the second heating device and the third heating device are controlled to be in a closed state, the cooking cavity air temperature is obtained, when the cooking cavity air temperature reaches the first preset temperature, the first heating device is controlled to be in a closed state, and when the cooking cavity air temperature is less than the first preset temperature, the first heating device is controlled to be in a working state.

[0022] It is set within the first preset time and the second preset time. When the air temperature of the cooking cavity reaches the first preset temperature, the first heating device is controlled to be in a closed state. When the air temperature of the cooking cavity is lower than the first preset temperature, the first heating device is controlled to be in a working state, so that the temperature in the cooking cavity is around the first preset temperature. The high temperature can melt the fat, and the solid fat will become liquid fat. The fluidity of the fat increases, the viscosity of the fat decreases, and the fat is easier to flow out.

[0023] The fan is set to work within the first preset time and the second preset time, so that the temperature and humidity in the cooking cavity are relatively uniform, which is more conducive to cooking ingredients. The second heating device and the third heating device are controlled to be in a closed state to avoid Maillard reaction on the surface of the meat, which may block the pores of the meat and prevent the fat from flowing out. Therefore, the fat in the meat gradually flows out during the cooking process.

[0024] After the food is placed in the cooking cavity and the oven door closes the cooking cavity opening, the steam generator is controlled to work for a first preset time, so that steam starts to be sprayed after the oven door closes the cooking cavity opening, which can reduce the dryness in the cooking cavity, increase the humidity in the cooking cavity, make it easier for water molecules to transfer heat to the food, and be more conducive to melting fat and reducing the generation of harmful substances such as heterocyclic amines; within a second preset time after the steam generator works for the first preset time, the air humidity of the cooking cavity is obtained, when the air humidity of the cooking cavity reaches the first preset humidity, the steam generator is controlled to stop working, and when the air humidity of the cooking cavity is lower than the first preset humidity, the steam generator is controlled to work at a certain duty cycle, as cooking proceeds, the fat will slowly melt, and the humidity in the cooking cavity will also increase until it is about the first preset humidity, the steam will slightly hydrolyze the internal fat, water will enter the oil, release free fatty acids, and can take away part of the oil and volatile substances, the humidity in the cooking cavity increases, the water vapor in the cooking cavity will condense on the surface of the food, and the condensed water will take away the melted oil droplets.

[0025] During the first preset time and the second preset time, the first heating device and the steam generator are set to work, so that after the food is heated by high-temperature air with a certain humidity, the muscle protein is thermally denatured, the protein spatial structure unfolds, the amino acid side chain groups are exposed, the myofibrillar protein is denatured and cross-linked, and aggregates with each other, resulting in the enlargement of the patty and the gap channel.

[0026] According to an embodiment of the present disclosure, the controller is configured to:

[0027] Within a third preset time t3 after the second preset time, the first heating device and the steam generator are controlled to be in a closed state, and the cooking cavity air temperature is obtained. When the cooking cavity air temperature reaches the second preset temperature, the second heating device and the third heating device are controlled to be in a closed state. When the cooking cavity air temperature is lower than the second preset temperature, the second heating device and the third heating device are controlled to be in a working state.

[0028] It is set that within the third preset time, the first heating device and the steam generator are in a closed state, and the second heating device and the third heating device are controlled to stop or work according to the relationship between the cooking cavity temperature and the second preset temperature, so that the temperature in the cooking cavity can be controlled at around the second preset temperature, and the second heating device and the third heating device can be used to make the meat expand and then contract, which will promote the seepage of fat.

[0029] According to an embodiment of the present disclosure, the controller is configured to:

[0030] In the first mode, in response to the instruction to close the cooking chamber opening by the chamber door, the steam generator is controlled to continuously spray steam for a fourth preset time t4, where t4 < t1. After the food ingredients are placed in the cooking chamber, spraying steam first can reduce the dryness in the cooking chamber, increase the humidity in the cooking chamber, make it easier for water molecules to transfer heat to the food ingredients, be more conducive to melting fat, and reduce the generation of harmful substances such as heterocyclic amines.

[0031] According to an embodiment of the present disclosure, the controller is configured to:

[0032] After controlling the steam generator to continuously spray steam for the fourth preset time t4, the steam generator is controlled to operate at a first duty cycle for a fifth preset time t5, where t1 = t4 + t5. This can further increase the humidity in the cooking chamber, make the cooking chamber have a certain humidity, make it easier for water molecules to transfer heat to the food ingredients, be more conducive to melting fat, and reduce the generation of harmful substances such as heterocyclic amines.

[0033] According to an embodiment of the present disclosure, the controller is configured to:

[0034] Within the second preset time, when the steam generator operates, the duty cycle of the steam generator is a second duty cycle, and the second duty cycle is greater than the first duty cycle, so that the air humidity in the cooking chamber increases. The steam will mildly hydrolyze the internal fat, water enters the oil, and free fatty acids are released, which can carry away some oils and volatile substances. The humidity in the cooking chamber increases, and the water vapor in the cooking chamber will condense on the surface of the food ingredients, and the condensed water will carry away the melted oil droplets, causing the fat in the meat to migrate.

[0035] According to an embodiment of the present disclosure, the controller is configured to:

[0036] In response to the input signals of the first mode, target temperature, and cooking time input by the user, start the first heating device, the third heating device, and the steam generator;

[0037] Real-time obtain the air temperature in the cooking chamber detected by the detection device. When the air temperature in the cooking chamber reaches the third preset temperature, the first heating device, the third heating device, and the steam generator stop working to complete the preheating process. This can make the cooking chamber have a certain temperature and humidity, so that when the food ingredients are placed in the cooking chamber, the temperature and humidity in the cooking chamber can quickly meet the requirements, save cooking time, and can also make the temperature and humidity quickly meet the needs of fat melting, make the fat flow, and improve the fat melting effect.

[0038] According to an embodiment of the present disclosure, it includes:

[0039] A voice module, connected to the controller;

[0040] The controller is configured to:

[0041] When the air temperature of the cooking cavity reaches a third preset temperature, the voice module is controlled to play a sound.

[0042] According to an embodiment of the present disclosure, the second preset time is greater than the first preset time, so that the fat migration time is greater than the fat melting time, so that the melted fat has enough time to migrate, thereby ensuring the fat removal rate.

[0043] According to an embodiment of the present disclosure, the second preset temperature is greater than the first preset temperature, so that the temperature in the cooking cavity can be further increased. The second heating device and the third heating device can be used to make the meat expand and then contract to a greater extent, which will promote more fat seepage.

[0044] According to an embodiment of the present disclosure, a steam oven is also provided, comprising:

[0045] Box shell;

[0046] An inner pot is arranged in the box shell and has a cooking cavity formed therein, wherein a cooking cavity opening is arranged at the front end of the cooking cavity;

[0047] A door, used to open or close the cooking cavity opening;

[0048] A fan chamber, located in the inner tank;

[0049] An air inlet and an air outlet, connecting the fan cavity and the cooking cavity;

[0050] Fan, including:

[0051] 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 to the cooking cavity through the air outlet;

[0052] A first heating device, at least partially disposed in the fan cavity to heat the air in the fan cavity;

[0053] a second heating device, at least partially disposed in the cooking cavity to heat the air in the cooking cavity;

[0054] a third heating device, at least partially disposed below the inner container to heat the air in the inner container;

[0055] A detection device, used to detect the air temperature and air humidity in the cooking cavity;

[0056] 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;

[0057] A controller is connected to the first heating device, the second heating device, the third heating device, the fan and the steam generator; the controller is configured as follows:

[0058] In the first mode, in response to the instruction of the door to close the opening of the cooking cavity, the steam generator is controlled to continuously spray steam for a fourth preset time, and then the steam generator is immediately controlled to work for a fifth preset time; within a second preset time after the steam generator works for the fifth preset time, the air humidity of the cooking cavity is obtained, when the air humidity of the cooking cavity reaches a first preset humidity, the steam generator is controlled to stop working, and when the air humidity of the cooking cavity is lower than the first preset humidity, the steam generator is controlled to work at a certain duty cycle;

[0059] During the fourth preset time and the fifth preset time of the steam generator's operation and during the second preset time after the fifth preset time of the steam generator's operation, the fan is controlled to be in an operating state, the second heating device and the third heating device are controlled to be in an off state, the cooking cavity air temperature is obtained, when the cooking cavity air temperature reaches a first preset temperature, the first heating device is controlled to be in an off state, and when the cooking cavity air temperature is less than the first preset temperature, the first heating device is controlled to be in an operating state. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 is a front view of a partial structure of a steam oven according to an embodiment of the present application;

[0061] Figure 2 is a side view of a partial structure of a steam oven according to an embodiment of the present application;

[0062] Figure 3 is a partial structural stereogram of a steam oven according to an embodiment of the present application;

[0063] Figure 4 is a partial structural diagram of a steam oven according to an embodiment of the present application;

[0064] Figure 5 is a front view of a partial structure of a steam oven from another perspective according to an embodiment of the present application;

[0065] Figure 6 is a partial structural sectional view of a steam oven according to an embodiment of the present application;

[0066] Figure 7 is a partial structural diagram of a steam oven from another perspective according to an embodiment of the present application;

[0067] Figure 8 is a partial structural diagram of a steam oven from another perspective according to an embodiment of the present application;

[0068] Fig. 9is a partial structural diagram of a steam oven from another perspective according to an embodiment of the present application;

[0069] Fig.10 is a partial structural diagram of a steam oven from another perspective according to an embodiment of the present application;

[0070] Fig.11 is a partial structural diagram of a steam oven from another perspective according to an embodiment of the present application;

[0071] Fig.12 is a partial structural diagram of a steam oven from another perspective according to an embodiment of the present application;

[0072] Fig.13 is a partial structural diagram of a steam oven from another perspective according to an embodiment of the present application;

[0073] Fig.14 is a partial connection diagram of a steam oven according to an embodiment of the present application;

[0074] Fig.15 It is a partial working flow diagram of the steam oven according to the embodiment of the present application;

[0075] Fig.16 is another partial working flow diagram of the steam oven according to the embodiment of the present application;

[0076] Fig.17 is another partial working flow diagram of the steam oven according to the embodiment of the present application;

[0077] Fig.18 is a state change diagram of a steam generator, a first heating device, a second heating device and a third heating device according to an embodiment of the present application;

[0078] Fig.19 This is a diagram showing changes in temperature and humidity in a cooking cavity according to an embodiment of the present application.

[0079] In the above figures: steam oven 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

[0080] In order to make the purpose and implementation method of the present application clearer, the exemplary implementation method of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0081] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0082] The terms "first", "second", "third", etc. in the specification and claims of this application and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances.

[0083] The terms "comprises," "comprising," 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.

[0084] The present application proposes a steam oven 100 , which will be described below with reference to the accompanying drawings.

[0085] refer to Figure 1-Figure 4 The steam oven 100 may include a housing 1. The housing 1 may be used to protect components located inside the housing 1.

[0086] The bottom of the box shell 1 to the top of the box shell 1 can be the height direction of the box shell 1. The box shell 1 can have a length direction. The side end of the box shell 1 to the other side end of the box shell 1 can be the length direction of the box shell 1. The box shell 1 can have a front-to-back direction. The front of the box shell 1 can be the side of the box shell 1 facing the user. Among the height direction, length direction and front-to-back direction of the box shell 1, any two directions can be perpendicular to each other.

[0087] refer to Figure 1-Figure 4 The steam oven 100 may include an inner container 2. The inner container 2 may be disposed in the housing 1. A cooking cavity 21 may be formed in 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 so that food can be placed in or taken out of the cooking cavity.

[0088] refer to Figure 1-Figure 4The oven 100 may have a door 3. The door 3 may be movably connected to the front side of the housing. The door 3 may be rotatably connected to the housing 1. The door 3 may be arranged at the front end of the cooking cavity opening, and the door 3 is used to open or close the cooking cavity opening.

[0089] In this application, reference is made to Figure 5-Figure 7 The steam oven may include a fan cavity 40. The fan cavity 40 may be located in the inner container. The steam oven may include an air inlet 41. The air inlet may connect the fan cavity with the cooking cavity. The air inlet may be located in the inner container. The steam oven may include an air outlet 42. The air outlet may connect the fan cavity with the cooking cavity. The air outlet may be located in the inner container. The fan cavity may be arranged at the rear side of the cooking cavity.

[0090] In this application, reference is made to Figure 5-Figure 7 The steam oven 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.

[0091] The fan 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 fan cavity through the air inlet and then flows back to the cooking cavity through the air outlet.

[0092] Setting a fan can establish air circulation between the fan cavity and the cooking cavity, so that the air temperature and humidity in each part of the cooking cavity and the fan cavity are relatively uniform, avoiding large temperature or humidity differences between two places that are far apart, and avoiding uneven cooking caused by large temperature differences.

[0093] In the present application, the fan may be a centrifugal fan. The centrifugal fan may be arranged opposite to the air inlet. The air in the cooking cavity 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.

[0094] In the present application, there may be multiple air outlets. Multiple air outlets may surround the outside of the air inlet. Among them, there may be four air outlets. Each air outlet has several holes. Each air inlet may have several holes.

[0095] In this application, reference is made to Figure 5-Figure 8 The inner container 2 may include an inner container rear wall 22. The inner container rear wall 22 may be disposed at the rear end of the inner container.

[0096] 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 prevent the steam or excessive temperature in the inner tank from affecting the fan motor.

[0097] In this application, reference is made to Figure 5-Figure 8The steam oven 100 may include a fan cover plate 4. The fan cover plate 4 may be arranged in the inner container 2. The fan cover plate and the inner container may define a fan cavity 40.

[0098] The fan cover plate 4 can be located in front of the rear wall of the inner pot. The fan cover plate and the rear wall of the inner pot can define a fan cavity. The fan cavity can be located behind the cooking cavity.

[0099] 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.

[0100] 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 out of the fan cavity into the cooking cavity.

[0101] In this application, reference is made to Figure 8-Figure 11 The steam oven 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 to heat the air in the fan cavity.

[0102] The first heating device 61 may include a first heating part 611. The first heating part 611 is disposed in the fan cavity. The first heating part 611 is disposed at the fan, and the first heating part may surround the outside of the fan along the circumference of the fan. The first heating part may be spirally wound into at least two turns.

[0103] The first heating device 61 can heat the air after the air flows out from the centrifugal fan, and the heated air flows back to the cooking cavity through the air outlet.

[0104] In this application, reference is made to Figure 8-Figure 11 The steam oven may include a second heating device 62. The second heating device may be at least partially disposed in the cooking cavity to heat the air in the cooking cavity. 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.

[0105] The second heating part 621 can heat the air in the cooking cavity. The second heating part 611 can be a heating wire. The second heating device can be located above the area where the food to be cooked is placed.

[0106] In this application, reference is made to Figure 8-Figure 11 The steam oven may include a third heating device 63. The third heating device 63 is at least partially disposed below the inner container to heat the air in the inner container. The third heating device 63 may include a third heating portion 631. The third heating portion 631 may be disposed below the inner container. The third heating portion may be a heating wire.

[0107] The inner container may include an inner container bottom wall 24. The inner container bottom wall may be disposed at the bottom end of the inner container. The third heating portion 631 may be disposed below the inner container bottom wall.

[0108] In the present application, the steam oven 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.

[0109] The detection device may include a temperature detection member. The temperature detection member may be used to detect the temperature in the cooking cavity. The temperature detection member may be a temperature sensor. The temperature detection member may be at least partially disposed in the cooking cavity to detect the temperature in the cooking cavity.

[0110] In the present application, the inner pot may include an inner pot top wall 23. The inner pot top wall 23 may be arranged at the top of the inner pot. The temperature detection element may be connected to the inner pot top wall, so as to better detect the air temperature in the cooking cavity.

[0111] In this application, reference is made to Figure 10-13 The detection device 71 may include a humidity detection member. The humidity detection member is used to detect the humidity in the cooking cavity. The humidity detection member may be a humidity sensor. The humidity detection member may be connected to the top wall of the inner pot, and can better detect the air humidity in the cooking cavity. The humidity detection member may be at least partially disposed in the cooking cavity to detect the humidity in the cooking cavity.

[0112] In the present application, the detection device 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. The temperature and humidity sensor may be connected to the top wall of the inner pot, and may be able to better detect the air temperature and air humidity in the cooking cavity.

[0113] In this application, reference is made to Figure 10-13 The steam oven may include a steam generator 72. The steam generator 72 may be disposed in 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 used to generate steam to supply steam to the cooking cavity so that the steam oven can steam food.

[0114] The steam generator has a steam outlet which is communicated with the cooking cavity so as to pass the steam into the cooking cavity.

[0115] 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 is connected to the cooking cavity. 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.

[0116] In the present application, a steam inlet is provided on the inner pot. The steam outlet of the steam generator is connected to the steam outlet pipe, and the steam outlet pipe is inserted into the steam inlet, so that the steam outlet is connected to 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 be connected to the cooking cavity through the fan cavity.

[0117] In this application, reference is made to Figure 10-13 The steam oven may include a water storage box 73 for storing water. The water storage box may be arranged in the housing. The water storage box may be arranged outside the inner container. The water storage box may be arranged on the top of the inner container.

[0118] The steam oven may include a water pump 74. The water pump 74 may be arranged at the rear of the inner pot, the water inlet of the water pump is connected to the water storage box, and the water outlet of the water pump is connected to the steam generator. The water pump 74 delivers the water in the water storage box to the steam generator by utilizing the water pumping capacity of the water pump 74.

[0119] In this application, reference is made to Figure 10-13 The steam oven may include a fixing member 75. The fixing member 75 may be arranged behind the inner container. The steam generator may be fixed on the fixing member. The water pump may be fixed on the fixing member.

[0120] In this application, reference is made to Fig.14 The steam oven may include a controller 8. The controller 8 may be connected to the fan. The controller may control the rotation and stop of the fan.

[0121] The controller 8 may be connected to the first heating device and can control the first heating device to work to heat the air and control the first heating device to stop working.

[0122] The controller 8 can be connected to the second heating device and can control the second heating device to work to heat the air and control the second heating device to stop working.

[0123] The controller 8 can be connected to the third heating device. The controller can control the third heating device to work to heat the air and control the third heating device to stop working.

[0124] The controller can be connected to the steam generator and can control the steam generator to work and stop working.

[0125] The steam generator can work continuously. The steam generator can work at a certain duty cycle. The duty cycle of the steam generator is the ratio of the working time of the steam generator in a cycle to the total time in a cycle. The total time in a cycle is the sum of the working time of the steam generator in a cycle and the stop time of the steam generator in a cycle.

[0126] When the steam generator operates at a certain duty cycle, the steam generator may first spray steam and then stop spraying steam within one cycle.

[0127] The controller can be connected to the detection device, and the controller can obtain the temperature and humidity of the air in the cooking cavity detected by the detection device.

[0128] The steam oven may have a first mode, and when the steam oven is in the first mode, fat-free roasting of ingredients can be achieved.

[0129] In this application, reference is made to Fig.15 and Figure 18-19 , the controller can be configured as:

[0130] In the first mode, in response to an instruction of the door closing the cooking cavity opening, the steam generator is controlled to work for a first preset time, and within a second preset time t2 after the steam generator works for the first preset time t1, the air humidity of the cooking cavity is obtained, and when the air humidity of the cooking cavity reaches the first preset humidity, the steam generator is controlled to stop working, and when the air humidity of the cooking cavity is lower than the first preset humidity, the steam generator is controlled to work at a certain duty cycle;

[0131] During the first preset working time t1 of the steam generator and during the second preset time t2 after the first preset working time t1 of the steam generator, the fan is controlled to be in a working state, the second heating device and the third heating device are controlled to be in a closed state, the air temperature of the cooking cavity is obtained, when the air temperature of the cooking cavity reaches the first preset temperature, the first heating device is controlled to be in a closed state, and when the air temperature of the cooking cavity is lower than the first preset temperature, the first heating device is controlled to be in a working state.

[0132] It is set within the first preset time and the second preset time. When the air temperature of the cooking cavity reaches the first preset temperature, the first heating device is controlled to be in a closed state. When the air temperature of the cooking cavity is lower than the first preset temperature, the first heating device is controlled to be in a working state, so that the temperature in the cooking cavity is around the first preset temperature. The high temperature can melt the fat, and the solid fat will become liquid fat. The fluidity of the fat increases, the viscosity of the fat decreases, and the fat is easier to flow out.

[0133] The fan is set to work within the first preset time and the second preset time, so that the temperature and humidity in the cooking cavity are relatively uniform, which is more conducive to cooking ingredients. The second heating device and the third heating device are controlled to be in a closed state to avoid Maillard reaction on the surface of the meat, which may block the pores of the meat and prevent the fat from flowing out. Therefore, the fat in the meat gradually flows out during the cooking process.

[0134] After the food is placed in the cooking cavity and the oven door closes the cooking cavity opening, the steam generator is controlled to work for a first preset time, so that steam starts to be sprayed after the oven door closes the cooking cavity opening, which can reduce the dryness in the cooking cavity, increase the humidity in the cooking cavity, make it easier for water molecules to transfer heat to the food, and be more conducive to melting fat and reducing the generation of harmful substances such as heterocyclic amines; within a second preset time after the steam generator works for the first preset time, the air humidity of the cooking cavity is obtained, when the air humidity of the cooking cavity reaches the first preset humidity, the steam generator is controlled to stop working, and when the air humidity of the cooking cavity is lower than the first preset humidity, the steam generator is controlled to work at a certain duty cycle, as cooking proceeds, the fat will slowly melt, and the humidity in the cooking cavity will also increase until it is about the first preset humidity, the steam will slightly hydrolyze the internal fat, water will enter the oil, release free fatty acids, and can take away part of the oil and volatile substances, the humidity in the cooking cavity increases, and the water vapor in the cooking cavity will condense on the surface of the food, and the condensed water will take away the melted oil droplets.

[0135] During the first preset time and the second preset time, the first heating device and the steam generator are set to work, so that after the food is heated by high-temperature air with a certain humidity, the muscle protein is thermally denatured, the protein spatial structure unfolds, the amino acid side chain groups are exposed, the myofibrillar protein is denatured and cross-linked, and aggregates with each other, resulting in the enlargement of the patty and the gap channel.

[0136] Among them, the first preset temperature T1≥the first parameter value, the first parameter value can be any value between 100℃-120℃, which can avoid the first preset temperature being too low, so that the temperature can be high enough to dissolve the fat better; the first preset temperature T1≤the second parameter value, the second parameter value can be any value between 230℃-250℃, which can avoid the first preset temperature being too high, which may cause the Maillard reaction on the surface of the meat placed in the cooking cavity, causing the pores of the meat to be blocked and the fat to be unable to flow out, and can gradually heat the meat, gradually open the pores of the meat, and melt and carry away the fat inside the meat.

[0137] Among them, the first preset humidity M1 ≥ the third parameter value, the third parameter value can be any value between 65%-75%, to avoid low humidity in the cooking chamber, which can make it easier for water molecules to transfer heat to the food, which is more conducive to melting fat, reducing the production of harmful substances such as heterocyclic amines, and facilitating steam to hydrolyze internal fat. Water enters the oil and releases free fatty acids, which can take away some oil and volatile substances, facilitate the condensation of water vapor on the surface of the food, and facilitate the melted oil to be taken away by the condensed water. The first preset humidity M1 ≤ the fourth parameter value, the fourth parameter value can be any value between 85%-95%, which can avoid excessive humidity, avoid keeping the steam generator in working state, and reduce energy consumption.

[0138] In this application, reference is made to Fig.16 , the controller can be configured as:

[0139] Within a third preset time t3 after the second preset time, the first heating device and the steam generator are controlled to be in a closed state, the cooking cavity air temperature is obtained, when the cooking cavity air temperature reaches the second preset temperature, the second heating device and the third heating device are controlled to be in a closed state, and when the cooking cavity air temperature is less than the second preset temperature, the second heating device and the third heating device are controlled to be in a working state;

[0140] It is set that within the third preset time, the first heating device and the steam generator are in a closed state, and the second heating device and the third heating device are controlled to stop or work according to the relationship between the cooking cavity temperature and the second preset temperature, so that the temperature in the cooking cavity can be controlled at around the second preset temperature, and the second heating device and the third heating device can be used to make the meat expand and then contract, which will promote the seepage of fat.

[0141] Among them, the second preset temperature can be greater than the first preset temperature, which can further increase the temperature in the cooking cavity. The second heating device and the third heating device can be used to make the meat expand and then contract to a greater extent, which will promote more oil seepage.

[0142] Among them, the second preset temperature T2≥the fifth parameter value, the fifth parameter value can be any value between 140℃-160℃, which can avoid the second preset temperature being too low, so that the temperature can be high enough to make the meat shrink better and improve the degreasing rate; the second preset temperature T2≤the sixth parameter value, the sixth parameter value can be any value between 260℃-280℃, which can avoid the second preset temperature being too high to cause carbonization of the meat surface.

[0143] In this application, the controller can be configured as:

[0144] In the first mode, in response to the instruction of the oven door closing the cooking cavity opening, the steam generator is controlled to continuously spray steam for a fourth preset time t4, and the fourth preset time t4 < the first preset time t1, and steam can be sprayed first after the food is placed in the cooking cavity, which can reduce the dryness in the cooking cavity, increase the humidity in the cooking cavity, make it easier for water molecules to transfer heat to the food, and be more conducive to melting fat and reducing the generation of harmful substances such as heterocyclic amines. Among them, the fourth preset time t4 can be any value between 5s and 60s.

[0145] In this application, the controller can be configured as:

[0146] After controlling the steam generator to continuously spray steam for the fourth preset time t4, the steam generator is controlled to work at the first duty cycle for the fifth preset time t5, t1=t4+t5, that is, the first preset time is the sum of the fourth preset time and the fifth preset time, which can further increase the humidity in the cooking cavity, so that the cooking cavity has a certain humidity, making it easier for water molecules to transfer heat to food, which is more conducive to melting fat and reducing the production of harmful substances such as heterocyclic amines.

[0147] Wherein, the first duty cycle is ≥ the seventh parameter value, and the seventh parameter value can be any value between 1 / 30-2 / 30, so as to avoid the first duty cycle being too small, and to avoid the humidity in the cooking cavity increasing slowly, so that the humidity in the cooking cavity cannot reach the preset level within the fifth preset time, so that the heat transfer effect between the air and the food is not good, and the fat melting is affected. The first duty cycle is ≤ the eighth parameter value, and the eighth parameter value can be any value between 14 / 15-1, so that the humidity in the cooking cavity is large enough, and the heat can be better transferred to the food through water molecules, which is more conducive to the melting and decomposition of fat. Wherein, in 60s, the steam generator can work for any value between 2s-60s.

[0148] In this application, the controller can be configured as:

[0149] During the second preset time, when the steam generator is working, the duty cycle of the steam generator is the second duty cycle, which is greater than the first duty cycle. The second duty cycle is set to be greater than the first duty cycle, so that the air humidity in the cooking cavity increases, the steam will slightly hydrolyze the internal fat, water enters the oil, releases free fatty acids, and can take away some oil and volatile substances. The humidity in the cooking cavity increases, and the water vapor in the cooking cavity will condense on the surface of the food. The condensed water will take away the melted oil droplets, causing the fat in the meat to migrate.

[0150] The second duty cycle is ≥ the ninth parameter value, and the ninth parameter value can be any value between 1 / 30-2 / 30, so as to avoid the second duty cycle being too small, so that the cooking cavity can have a certain humidity. The second duty cycle is ≤ the tenth value, and the tenth parameter value can be any value between 14 / 15-1, so that the humidity in the cooking cavity is large enough to allow the steam to slightly hydrolyze the internal fat, and the water enters the oil to release free fatty acids, which can take away some oil and volatile substances. The humidity in the cooking cavity is increased, which is more conducive to the condensation of water vapor on the surface of the food. The condensed water will take away the melted oil droplets, which is conducive to the migration of fat. In 60 seconds, the steam generator can work for any value between 2 seconds and 60 seconds.

[0151] In this application, the controller can be configured as:

[0152] In the first mode, in response to the instruction of the door closing the cooking cavity opening, the steam generator is controlled to continuously spray steam for a fourth preset time, and then the steam generator is immediately controlled to work for a fifth preset time; within a second preset time after the steam generator works for the fifth preset time, the air humidity of the cooking cavity is obtained, when the air humidity of the cooking cavity reaches the first preset humidity, the steam generator is controlled to stop working, and when the air humidity of the cooking cavity is lower than the first preset humidity, the steam generator is controlled to work at a certain duty cycle;

[0153] During the fourth preset time and the fifth preset time of the steam generator working and during the second preset time after the fifth preset time of the steam generator working, the fan is controlled to be in an operating state, the second heating device and the third heating device are controlled to be in an off state, the cooking cavity air temperature is obtained, when the cooking cavity air temperature reaches the first preset temperature, the first heating device is controlled to be in an off state, and when the cooking cavity air temperature is less than the first preset temperature, the first heating device is controlled to be in an operating state.

[0154] An instruction is set to respond to the oven door closing the cooking cavity opening, and control the steam generator to continuously spray steam for a fourth preset time. After the food is put into the cooking cavity, steam can be sprayed first, which can reduce the dryness of the cooking cavity, increase the humidity in the cooking cavity, and make it easier for water molecules to transfer heat to the food, which is more conducive to melting fat and reducing the production of harmful substances such as heterocyclic amines.

[0155] Setting the control of the steam generator to work for the fifth preset time can melt the fat, and then the steam will slightly hydrolyze the internal fat. Water enters the oil, releasing free fatty acids, which can take away some oil and volatile substances. The humidity in the cooking cavity increases, and the water vapor in the cooking cavity will condense on the surface of the food. The condensed water will take away the melted fat droplets.

[0156] The fourth preset time, the fifth preset time and the second preset time are set so that the temperature in the cooking cavity is around the first preset temperature, so that the high temperature can melt the fat, and the solid fat will become liquid fat, the fluidity of the fat will increase, the viscosity of the fat will decrease, and the fat will flow out more easily.

[0157] The fan is set to work within the fourth preset time, the fifth preset time and the second preset time, so that the temperature and humidity in the cooking cavity are relatively uniform, which is more conducive to cooking ingredients. The second heating device and the third heating device are controlled to be in a closed state to avoid Maillard reaction on the surface of the meat, which may block the pores of the meat and prevent the fat from flowing out. Therefore, the fat in the meat gradually flows out during the cooking process.

[0158] It is set to obtain the air humidity of the cooking cavity within a second preset time after the steam generator has worked for a fifth preset time. When the air humidity of the cooking cavity reaches a first preset humidity, the steam generator is controlled to stop working. When the air humidity of the cooking cavity is lower than the first preset humidity, the steam generator is controlled to work at a certain duty cycle, so that as cooking proceeds, the fat will slowly melt, and the humidity in the cooking cavity will also increase until it reaches about the first preset humidity. The steam will slightly hydrolyze the internal fat, and water will enter the oil to release free fatty acids, which can take away part of the oil and volatile substances. The humidity in the cooking cavity increases, and the water vapor in the cooking cavity will condense on the surface of the food, and the condensed water will take away the melted oil droplets.

[0159] During the fourth preset time, the fifth preset time and the second preset time, the first heating device and the steam generator are set to work, so that after the food is heated by high-temperature air with a certain humidity, the muscle protein is denatured by heat, the protein spatial structure unfolds, the amino acid side chain groups are exposed, the myofibrillar protein is denatured and cross-linked, and aggregates with each other, resulting in the enlargement of the patty and the gap channel.

[0160] In this application, reference is made to Figure 17-Figure 18 , the controller is configured as:

[0161] In response to the first mode, target temperature and cooking time input signals input by the user, the first heating device, the third heating device and the steam generator are activated,

[0162] The air temperature of the cooking cavity detected by the detection device is acquired in real time. When the air temperature of the cooking cavity reaches a third preset temperature, the first heating device, the third heating device and the steam generator stop working to complete the preheating process, so that the cooking cavity can have a certain temperature and humidity, so that when the food is placed in the cooking cavity, the temperature and humidity in the cooking cavity can quickly meet the requirements, thus saving cooking time, and can quickly meet the requirements of fat melting, allowing the fat to flow and improving the fat melting effect.

[0163] In response to the first mode, target temperature and cooking time input signals input by the user, the first heating device and the third heating device are set to operate, and the second heating device is stopped, so as to avoid overload and ensure the normal operation of the steam oven. Moreover, since the second heating device is arranged on the top of the cooking cavity, when the food is located in the cooking cavity, the second heating device is located above the food to be cooked. By setting the second heating device not to operate, it is possible to prevent the residual heat of the second heating device from causing the Maillard reaction on the surface of the meat after the food is placed in the cooking cavity, thereby clogging the pores of the meat and preventing the fat from flowing out. By setting the second heating device not to operate, the pores of the meat can be gradually opened to allow the fat to flow out, thereby improving the degreasing effect.

[0164] The third preset temperature and the first preset temperature can be equal, so that the preset temperature environment and the temperature environment for fat melting and migration are the same, and the preheating environment is close to the actual cooking environment, which is beneficial to fat melting and fat migration during actual cooking.

[0165] In this application, the controller can be configured as:

[0166] In response to user input of a first mode, a target temperature, and a cooking time instruction, the first mode is entered.

[0167] The steam oven may include a control panel, and a user may input a first mode, a target temperature, and a cooking time through the control panel. After the controller receives the instructions input by the user, the steam oven enters the first mode.

[0168] In the present application, the steam oven may include a voice module, and the voice module may be connected to the controller.

[0169] The controller is configured as:

[0170] When the air temperature of the cooking cavity reaches the third preset temperature, the first heating device, the third heating device and the steam generator are controlled to stop working, and the voice module is controlled to play a sound.

[0171] When the air temperature of the cooking cavity reaches a third preset temperature, the control voice module emits a sound indicating that preheating is completed.

[0172] The control panel may include a display screen. The controller is configured to:

[0173] When the air temperature of the cooking cavity reaches the third preset temperature, the first heating device, the third heating device and the steam generator are controlled to stop working, and a prompt font is displayed on the control display screen to remind the user that preheating is completed and please put in the ingredients.

[0174] After hearing the prompt sound or seeing the prompt font, the user opens the door to put the food in, and then closes the door. In response to the instruction of the door to close the cooking cavity opening, the steam generator is controlled to work for the first preset time.

[0175] The cooking time t0 is the sum of the first preset time t1, the second preset time t2 and the third preset time t3.

[0176] Among them, t1 / t0≥the eleventh parameter value, the eleventh parameter value can be any value between 0.1-0.2, to avoid the first preset time t1 accounting for too small a proportion of the cooking time, so that the fat can be fully melted, t1 / t0≤the twelfth parameter value, the twelfth parameter value can be any value between 0.7-0.8, to avoid the first preset time t1 accounting for too large a proportion of the cooking time, so that the subsequent fat migration process and the meat contraction process have enough time to proceed, to avoid insufficient fat migration time resulting in the fat melting but not migrating out, resulting in a low degreasing rate, and to avoid insufficient gap channel contraction time resulting in insufficient contraction after expansion, resulting in the oil in the gap not seeping out, resulting in a low degreasing rate.

[0177] Among them, t2 / t0≥the thirteenth parameter value, the thirteenth parameter value can be any value between 0.1-0.2, to avoid the second preset time t2 accounting for too small a proportion of the cooking time, resulting in insufficient fat migration time, resulting in the fat being melted but not migrating out, resulting in a low degreasing rate, t2 / t0≤the fourteenth parameter value, the fourteenth parameter value can be any value between 0.7-0.8, to avoid the second preset time t2 accounting for too large a proportion of the cooking time, resulting in too much fat migration time and less fat melting time, resulting in insufficient fat melting, resulting in a low degreasing rate, and to avoid insufficient gap channel contraction time resulting in insufficient contraction after expansion, resulting in the oil in the gap not seeping out, resulting in a low degreasing rate.

[0178] The second preset time can be greater than the first preset time, so that the fat migration time is greater than the fat melting time, so that the melted fat has enough time to migrate and ensure the fat degreasing rate, that is, t2-t1>0, to avoid too much fat melting time, resulting in incomplete fat migration and low fat degreasing rate; t2-t1≤fifteenth parameter value, the fifteenth parameter value can be any value between 0.2-0.4, to avoid the fat melting time and fat migration time not matching, too much fat migration time and too little fat melting time resulting in insufficient fat melting and low fat degreasing rate. t1 can be 0.3. t2 can be 0.4.

[0179] Among them, t3 / t0≥the sixteenth parameter value, the sixteenth parameter value can be any value between 0.1-0.2, to avoid the third preset time t3 accounting for too small a proportion of the cooking time, so that there is insufficient time for the meat to shrink, resulting in the oil in the gap not seeping out and the low degreasing rate, t3 / t0≤the seventeenth parameter value, the seventeenth parameter value can be any value between 0.7-0.8, to avoid the third preset time t3 accounting for too large a proportion of the cooking time, to avoid insufficient time for fat melting and fat migration, resulting in fewer gap channels formed, less oil seeping out during the meat roasting and shrinking process, resulting in a low degreasing rate.

[0180] Among them, t2-t3>0, to avoid the contraction time being too long and compressing the fat melting time and fat migration time, resulting in a low fat removal rate, t2-t3≤the eighteenth parameter value, the eighteenth parameter value can be any value between 0.2-0.4, to avoid the contraction time being too long and resulting in insufficient contraction and low fat removal rate. t2 can be 0.4, and t3 can be 0.3.

[0181] In this application, the controller is configured as:

[0182] Within the third preset time t3 after the second preset time, the fan is controlled to be in a working state, so that the temperature and humidity at various locations in the cooking cavity can be relatively uniform, which is conducive to uniform baking of food.

[0183] In this application, reference is made to Fig.17 After the controller receives the first mode, target temperature and cooking time instructions input by the user, the controller specifically performs the following steps:

[0184] S101: starting the first heating device, the third heating device and the steam generator;

[0185] S102: Acquiring the cooking cavity air temperature detected by the detection device;

[0186] S103: Determine whether the air temperature in the cooking cavity reaches the third preset temperature. If so, control the first heating device, the third heating device and the steam generator to stop working, and control the voice module to make a sound; if not, return to step S102.

[0187] In this application, when the controller receives an instruction to close the door, the controller specifically performs the following steps:

[0188] S201: Controlling the steam generator to work for a first preset time;

[0189] In this application, when the controller receives an instruction to close the door, the controller specifically performs the following steps:

[0190] S2011: controlling the steam generator to continuously spray steam for a fourth preset time;

[0191] S2012: Controlling the steam generator to operate at a certain duty cycle for a fifth preset time;

[0192] In this application, reference is made to Fig.15 , within the second preset time t2 after the steam generator works for the first preset time t1, the controller specifically performs the following steps:

[0193] S202: Obtaining the air humidity in the cooking chamber;

[0194] S203: Determine whether the air humidity in the cooking chamber reaches a first preset humidity. If yes, control the steam generator to stop and re-execute S202; if no, control the steam generator to operate at a certain duty cycle and re-execute S202.

[0195] In the present application, during the first preset time and the second preset time, the controller specifically performs the following steps:

[0196] S204: Control the fan to be in working state, and control the second heating device and the third heating device to be in off state.

[0197] In this application, reference is made to Fig.15 , within the first preset time and the second preset time, the controller specifically performs the following steps:

[0198] S205: Obtaining the air temperature of the cooking chamber;

[0199] S206: Determine whether the air temperature of the cooking chamber reaches the first preset temperature. If yes, control the first heating device to be in an off state and re-execute S205; if no, control the first heating device to be in an on state and re-execute S205.

[0200] In the present application, within the third preset time, the controller specifically performs the following steps:

[0201] S207: The first heating device and the steam generator are turned off.

[0202] In this application, reference is made to Fig.16 , within the third preset time, the controller specifically performs the following steps:

[0203] S208: Obtaining the air temperature of the cooking chamber;

[0204] S209: Determine whether the air temperature of the cooking chamber reaches the second preset temperature. If yes, control the second heating device and the third heating device to be in the off state and re-execute S208; if no, control the second heating device and the third heating device to be in the working state and re-execute S208.

[0205] In this application, a certain amount of pork tenderloin and pork lard can be weighed in a certain ratio, the ratio of pork tenderloin to pork lard can be 3:1, the pork tenderloin and pork lard are cut into small pieces, mixed and stirred evenly, 1% salt is added and put into a meat grinder to mince and mix evenly. Accurately weigh 70g of meat paste, of which 1g can float up and down, put it into a cylindrical mold and compact it into a pork pie with a diameter of 7cm and a height of 2cm, and then put it in a 4℃ refrigerator for 12h for standby use, and the diameter and height can float up and down by 0.2cm.

[0206] When cooking, you can select the defatted baking mode, set the target temperature and cooking time, and start the steam oven. The steam oven starts to preheat. After preheating is completed, put the pork patties into the cooking cavity, then close the door, and the steam oven will work until it is finished.

[0207] 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 it. 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0208] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A steam oven, characterized in that: include: Box shell; An inner pot is arranged in the box shell and has a cooking cavity formed therein, wherein a cooking cavity opening is arranged at the front end of the cooking cavity; A door, used to open or close the cooking cavity opening; A fan chamber, located in the inner tank; An air inlet and an air outlet, connecting the fan cavity and the cooking cavity; Fan, including: 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 to 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 second heating device, at least partially disposed in the cooking cavity to heat the air in the cooking cavity; a third heating device, at least partially disposed below the inner container to heat the air in the inner container; A detection device, used to detect the air temperature and air humidity in the cooking cavity; 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; A controller is connected to the first heating device, the second heating device, the third heating device, the fan, the detection device and the steam generator; the controller is configured as follows: In the first mode, in response to an instruction of the cabinet door to close the cooking cavity opening, the steam generator is controlled to operate for a first preset time t1, and within a second preset time t2 after the steam generator operates for the first preset time t1, the air humidity of the cooking cavity is obtained, and when the air humidity of the cooking cavity reaches the first preset humidity, the steam generator is controlled to stop operating, and when the air humidity of the cooking cavity is lower than the first preset humidity, the steam generator is controlled to operate with a certain duty cycle; within the first preset time t1 when the steam generator operates and within the second preset time t2 after the steam generator operates for the first preset time t1, the fan is controlled to be in an operating state, the second heating device and the third heating device are controlled to be in an off state, the air temperature of the cooking cavity is obtained, and when the air temperature of the cooking cavity reaches the first preset temperature, the first heating device is controlled to be in an off state, and when the air temperature of the cooking cavity is lower than the first preset temperature, the first heating device is controlled to be in an operating state.

2. The steam oven according to claim 1, characterized in that: The controller is configured to: Within a third preset time t3 after the second preset time t2, the first heating device and the steam generator are controlled to be in a closed state, and the cooking cavity air temperature is obtained. When the cooking cavity air temperature reaches a second preset temperature, the second heating device and the third heating device are controlled to be in a closed state. When the cooking cavity air temperature is lower than the second preset temperature, the second heating device and the third heating device are controlled to be in a working state.

3. The steam oven according to claim 2, characterized in that: The controller is configured to: In the first mode, in response to the instruction of the door to close the cooking cavity opening, the steam generator is controlled to continuously spray steam for a fourth preset time t4, t4 <t1。 4. The steam oven according to claim 3, characterized in that: The controller is configured to: After controlling the steam generator to continuously spray steam for a fourth preset time t4, controlling the steam generator to operate at the first duty cycle for a fifth preset time t5, t1=t4+t5.

5. The steam oven according to claim 4, characterized in that: The controller is configured to: During the second preset time t2, when the steam generator is working, the duty cycle of the steam generator is a second duty cycle, and the second duty cycle is greater than the first duty cycle.

6. The steam oven according to claim 1, characterized in that: The controller is configured to: activating the first heating device, the third heating device, and the steam generator in response to a first mode, a target temperature, and a cooking time input signal input by a user; The cooking cavity air temperature detected by the detection device is acquired in real time. When the cooking cavity air temperature reaches a third preset temperature, the first heating device, the third heating device and the steam generator stop working.

7. The steam oven according to claim 6, characterized in that: include: A voice module connected to the controller; The controller is configured to: When the air temperature of the cooking cavity reaches a third preset temperature, the voice module is controlled to play a sound.

8. The steam oven according to claim 1, characterized in that: The second preset time t2 is greater than the first preset time t1.

9. The steam oven according to claim 2, characterized in that: The second preset temperature is greater than the first preset temperature.

10. A steam oven, characterized in that: include: Box shell; An inner pot is arranged in the box shell and has a cooking cavity formed therein, wherein a cooking cavity opening is arranged at the front end of the cooking cavity; A door, used to open or close the cooking cavity opening; A fan chamber, located in the inner tank; An air inlet and an air outlet, connecting the fan cavity and the cooking cavity; Fan, including: 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 to 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 second heating device, at least partially disposed in the cooking cavity to heat the air in the cooking cavity; a third heating device, at least partially disposed below the inner container to heat the air in the inner container; A detection device, used to detect the air temperature and air humidity in the cooking cavity; 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; A controller is connected to the first heating device, the second heating device, the third heating device, the fan and the steam generator; the controller is configured as follows: In the first mode, in response to the instruction of the door to close the opening of the cooking cavity, the steam generator is controlled to continuously spray steam for a fourth preset time, and then the steam generator is immediately controlled to work for a fifth preset time; within a second preset time after the steam generator works for the fifth preset time, the air humidity of the cooking cavity is obtained, when the air humidity of the cooking cavity reaches a first preset humidity, the steam generator is controlled to stop working, and when the air humidity of the cooking cavity is lower than the first preset humidity, the steam generator is controlled to work at a certain duty cycle; During the fourth preset time and the fifth preset time of the steam generator's operation and during the second preset time after the fifth preset time of the steam generator's operation, the fan is controlled to be in an operating state, the second heating device and the third heating device are controlled to be in an off state, the cooking cavity air temperature is obtained, when the cooking cavity air temperature reaches a first preset temperature, the first heating device is controlled to be in an off state, and when the cooking cavity air temperature is less than the first preset temperature, the first heating device is controlled to be in an operating state.

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