Cooking apparatus

Abstract

The utility model discloses a kind of cooking equipment, the cooking equipment includes: box, steam generator and heating tube module, cooking chamber is equipped in box, cooking chamber has chamber bottom wall;Steam generator includes steam heating piece and steam cavity, steam heating piece is used to heat steam cavity to produce steam, steam cavity has the steam outlet with cooking chamber communication, the working power of steam heating piece is P 蒸 , P 蒸 ≥2600W;Heating tube module is located in cooking chamber, and heating tube module includes the first heating element for heating chamber bottom wall, the sum of the working power of steam generator and heating tube module does not exceed 3050W.High-power steam generator and heating tube module can improve steam generation efficiency, and food can be quickly warmed, improve cooking efficiency, also can reduce condensate water gathering at chamber bottom wall.And limit the sum of working power, can improve the working efficiency of cooking equipment under the premise of safe operation.

Description

Technical Field

[0001] This utility model relates to the field of cooking equipment technology, and in particular to a cooking device. Background Technology

[0002] Steam generators can be used in cooking appliances, such as steam ovens or baking machines, to produce steam for cooking food. However, related technologies suffer from low steam generation efficiency, resulting in longer heating times for food, and the accumulation of condensate at the bottom of the chamber, making cleaning difficult. There is room for improvement in these technologies. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a cooking device that has high cooking efficiency and reduces the accumulation of condensate at the bottom of the chamber, making it easy to use.

[0004] A cooking device according to an embodiment of the present invention includes: a housing, wherein a cooking chamber is provided inside the housing, the cooking chamber having a bottom wall; and a steam generator disposed in the housing, the steam generator including a steam heating element and a steam chamber, the steam heating element being used to heat the steam chamber to generate steam, the steam chamber having a steam outlet communicating with the cooking chamber, and the operating power of the steam heating element being P. 蒸 P 蒸 ≥2600W; heating element module, wherein the heating element module is disposed in the cooking chamber, the heating element module includes a first heating element for heating the bottom wall of the chamber, and the operating power P of the steam generator. 蒸 The total operating power of the heating element module does not exceed 3050W.

[0005] According to the embodiment of this utility model, the steam generator, by setting a high-power steam generator and heating element module, can improve steam generation efficiency and maintain the temperature inside the cooking cavity at a high temperature, enabling rapid heating of food and improving cooking efficiency. Furthermore, by setting a first heating element to heat the bottom wall of the cavity, it can reduce the accumulation of condensate on the bottom wall of the cavity, reducing the workload of cleaning the bottom wall and improving the ease of use of the cooking equipment. Limiting the total working power of the steam generator and heating element module to no more than 3050W can improve the working efficiency of the cooking equipment while ensuring safe operation.

[0006] In some embodiments, the heating element module further includes a second heating element for heating the bottom wall of the chamber, wherein the heating power of the second heating element is greater than that of the first heating element.

[0007] In some embodiments, the second heating element is disposed around the first heating element, and the first heating element is located on one side of the second heating element near the middle of the bottom wall of the chamber.

[0008] In some embodiments, the heating element module further includes a third heating element located at the top of the cooking chamber.

[0009] In some embodiments, the heating element module further includes a fourth heating element located at the top of the cooking chamber, the heating power of the fourth heating element being greater than that of the third heating element.

[0010] In some embodiments, the third heating element is disposed around the fourth heating element, and the fourth heating element is located on the side of the third heating element near the center of the cooking chamber.

[0011] In some embodiments, the cooking device has a steaming mode, in which the steam heating element operates intermittently and the first heating element operates intermittently.

[0012] In some embodiments, the steaming mode includes multiple sequentially running stages, the multiple running stages including a first stage when it is turned on, the first stage running for a first set duration, in the first stage, the steam heating element runs for the first set duration and the first heating element runs for the first set duration.

[0013] In some embodiments, the plurality of operating phases include a second phase, the operating duration of the second phase being a second preset duration, wherein the operating time of the steam heating element and the operating time of the first heating element are both shorter than the second preset duration.

[0014] In some embodiments, the steam generator includes a fluid pipe and a heat-conducting element, the fluid pipe defining the steam chamber and having at least one fluid bend; the steam heating element is formed in a tubular shape and has at least one heating bend, one of the fluid bend and the heating bend being located radially inside the other, a heat-conducting gap being formed between the heating bend and the fluid bend, and at least a portion of the heat-conducting element filling the heat-conducting gap.

[0015] In some embodiments, the minimum value of the thermally conductive gap in the radial direction of the fluid pipe ranges from 3 to 8 mm.

[0016] In some embodiments, the heating bend is located radially inside the fluid bend, and the ratio of the radius of the heating bend to the radius of the fluid bend ranges from 2 / 3 to 3 / 4.

[0017] In some embodiments, the radius of the heating bend is in the range of 20-40 mm, and the radius of the fluid bend is in the range of 30-60 mm.

[0018] In some embodiments, the ratio of the diameter of the steam heating element to the radius of the heating bend ranges from 1 / 4 to 4 / 15.

[0019] In some embodiments, the diameter of the steam heating element is in the range of 5-10 mm, and the radius of the heating bend is in the range of 20-40 mm.

[0020] In some embodiments, the ratio of the diameter of the fluid pipe to the radius of the fluid bend ranges from 1 / 5 to 1 / 2.

[0021] In some embodiments, the diameter of the fluid pipe is in the range of 6-12 mm, and the radius of the fluid bend is in the range of 30-60 mm.

[0022] In some embodiments, the heat-conducting element at least completely encloses the fluid bend and the heating bend, and the heat-conducting element is fixed to the housing by a mounting bracket.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a structural schematic diagram of the hidden door panel of a cooking appliance according to an embodiment of the utility model;

[0026] Figure 2 This is a rear view of the hidden rear shell of the cooking device according to an embodiment of the utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the bottom wall of the hidden chamber of the cooking device according to an embodiment of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the top wall of the hidden chamber of the cooking device according to an embodiment of the utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the steam generator of the cooking equipment according to an embodiment of the present utility model;

[0030] Figure 6This is a schematic diagram of the structure of the fluid pipe and steam heating element according to an embodiment of the present utility model;

[0031] Figure 7 This is a cross-sectional view of the fluid bend and the heating bend according to an embodiment of the present utility model;

[0032] Figure 8 This is a control logic diagram of the first stage of the control method for the cooking equipment according to an embodiment of the present utility model;

[0033] Figure 9 This is a control logic diagram of the second stage of the control method for the cooking equipment according to an embodiment of the present utility model;

[0034] Figure 10 This is a control logic diagram of the second stage of the control method for the cooking equipment according to an embodiment of the present utility model;

[0035] Figure 11 This is a control logic diagram of a control method for a cooking device according to some specific embodiments of the present invention;

[0036] Figure 12 This is a comparison chart of the core temperature rise of the cooking device according to the present invention and existing cooking devices.

[0037] Figure label:

[0038] Cooking equipment 100;

[0039] Box body 1; cooking chamber 11; bottom wall of the chamber 12;

[0040] Steam generator 2; Steam heating element 21; Heating bend 211; Fluid pipe 22; Steam chamber 221; Steam outlet 2211; Fluid bend 222; Thermally conductive gap 2a; Thermally conductive element 23; Mounting bracket 231;

[0041] Heating element module 3; first heating element 31; second heating element 32; top heating module 3a; third heating element 33; fourth heating element 34;

[0042] Intake pipe 4. Detailed Implementation

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0044] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] The cooking apparatus 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0047] According to the embodiments of the present utility model, the cooking device 100, such as Figures 1-3 As shown, the cooking device 100 includes: a housing 1, a steam generator 2, and a heating element module 3. The housing 1 contains a cooking chamber 11, which has a bottom wall 12. The steam generator 2 is located within the housing 1 and includes a steam heating element 21 and a steam chamber 221. The steam heating element 21 heats the steam chamber 221 to generate steam. The steam chamber 221 has a steam outlet 2211 communicating with the cooking chamber 11. The operating power of the steam heating element 21 is P. 蒸 P 蒸 ≥2600W; The heating element module 3 is located inside the cooking chamber 11. The heating element module 3 includes a first heating element 31 for heating the bottom wall 12 of the chamber. The operating power P of the steam generator 2 is... 蒸 The total operating power of the heating element module 3 shall not exceed 3050W.

[0048] The housing 1 is the main component of the cooking device 100, defining a cooking chamber 11 within which food is placed for cooking. A steam generator 2 is located inside the housing 1 and generates high-temperature steam to cook the food. The steam generator 2 includes a steam heating element 21 and a steam chamber 221. The steam heating element 21 heats the steam chamber 221, converting liquid water into high-temperature steam within the steam chamber 221. This high-temperature steam is then transported to the cooking chamber 11 through the steam outlet 2211, thus enabling the use of high-temperature steam to cook the food.

[0049] The steam generators in related technologies have low power and low steam generation efficiency, resulting in longer heating times for food and failing to meet the usage requirements of cooking equipment. Therefore, the cooking equipment 100 of this utility model adopts a steam heating element 21 with a power of 2600W, which can improve the steam generation efficiency of the steam generator 2, accelerate the cooking speed of food, and meet the usage requirements of the cooking equipment 100.

[0050] Furthermore, it uses a 2600W steam heating element 21, which is below the maximum power limit of 3500W for household cooking equipment, making it safe to use and leaving room for other devices to operate.

[0051] The cooking device 100 of this utility model embodiment also includes a heating tube module 3, which is disposed in the cooking chamber 11. The heating tube module 3 can heat the cooking chamber 11. The heating tube module 3 and the steam generator 2 can work independently, so that they can cook food separately, or they can work together to cook food, thereby improving the functionality of the cooking device 100.

[0052] For example, the steam generator 2 operates independently, supplying high-temperature steam to the cooking chamber for steaming food; for example, the heating element heats the cooking chamber 11 independently for baking food; for example, the heating element heats the cooking chamber 11 while the steam generator 2 supplies high-temperature steam to the cooking chamber 11 for both baking and steaming food.

[0053] Beyond this, the heating element module 3 can also enhance the working efficiency of the steam generator 2. The steam generator 2 delivers high-temperature steam to the cooking chamber 11, where the temperature is relatively low, causing the steam temperature to drop and increasing the heating time for food. By using the heating element module 3 to heat the cooking chamber 11, the temperature inside the cooking chamber 11 is increased, and the high-temperature steam can maintain a higher temperature, thereby quickly heating the food and improving cooking efficiency.

[0054] The heating element module 3 includes a first heating element 31. By heating the bottom wall 12 of the chamber using the first heating element 31, the temperature of the cooking chamber 11 can be increased. Furthermore, the condensate that accumulates on the bottom of the chamber after steam condenses can be heated by the first heating element 31, thus allowing for water reuse. This increases the amount of steam in the cooking chamber 11 and improves cooking efficiency. It also reduces condensate accumulation on the bottom wall 12 of the chamber, reducing the workload of cleaning the bottom wall 12 after cooking and improving the ease of use of the cooking equipment 100.

[0055] It is worth noting that the maximum power of household cooking equipment cannot exceed 3500W. Assuming it operates at 90% of its rated power, i.e., 3150W, and reserving 100W for the cooling system, control board, and display panel, leaves 3050W remaining. Therefore, this embodiment limits the total operating power of the steam generator 2 and heating element module 3 to no more than 3050W, which improves the efficiency of the cooking equipment 100 while ensuring its safe operation.

[0056] According to the embodiments of the present invention, the cooking device 100, by setting a high-power steam generator 2 and a heating element module 3, can improve steam generation efficiency and maintain the temperature inside the cooking cavity at a high temperature, enabling rapid heating of food and improving cooking efficiency. Furthermore, by setting a first heating element 31 to heat the bottom wall 12 of the cavity, it can reduce the accumulation of condensate on the bottom wall 12, reducing the workload of cleaning the bottom wall 12 and improving the ease of use of the cooking device 100. Limiting the total working power of the steam generator 2 and the heating element module 3 to no more than 3050W can improve the working efficiency of the cooking device 100 while ensuring safe operation.

[0057] In some embodiments of this utility model, such as Figure 3 As shown, the heating element module 3 also includes a second heating element 32 for heating the bottom wall 12 of the chamber, and the heating power of the second heating element 32 is greater than that of the first heating element 31.

[0058] The first heating element 31 has a relatively low power, and can be dedicated to heating the condensate on the bottom wall 12 of the chamber, reducing the accumulation of condensate on the bottom wall 12, reducing the workload of cleaning the bottom wall 12 after cooking, and improving the ease of use of the cooking equipment 100. The low power of the first heating element 31 also reduces overheating of the bottom of the food, preventing situations where the top of the food is not fully cooked while the bottom is already overheated.

[0059] The first heating element 31 and the second heating element 32 can work independently. By designing the heating power of the second heating element 32 to be greater than that of the first heating element 31, the first heating element 31 and the second heating element 32 can work differently, which can further enhance the functionality of the cooking equipment 100 and improve the problem of food burning caused by the inability of the first heating element 31 and the second heating element 32 with the same power to adjust the baking temperature.

[0060] For example, the first heating element 31 and the second heating element 32 work together to bake the food, which can quickly raise the temperature of the food and improve efficiency; for example, the first heating element 31 works alone, and the first heating element 31 only heats the condensate on the bottom wall 12 of the chamber, reducing the accumulation of condensate on the bottom wall 12 of the chamber and reducing overheating of the bottom of the food; for example, the second heating element 32 works alone, and the second heating element 32 slowly bakes the food, improving the cooking effect.

[0061] In some embodiments of this utility model, such as Figure 3 As shown, the second heating element 32 is arranged around the first heating element 31, and the first heating element 31 is located on the side of the second heating element 32 near the middle of the bottom wall 12 of the chamber.

[0062] The first heating element 31 is positioned near the middle of the bottom wall 12 of the chamber. Condensation tends to accumulate in the middle of the bottom wall 12 of the chamber. Positioning the first heating element 31 in the middle of the bottom wall 12 of the chamber can shorten the heat transfer path and improve the working efficiency of the first heating element 31.

[0063] The second heating element 32 is arranged around the first heating element 31. The second heating element 32 is arranged on one side of the bottom wall 12 of the cooking chamber relative to the first heating element 31. The second heating element 32 has a larger coverage area, which is conducive to uniform heating of the cooking chamber 11 and can improve the working efficiency of the second heating element 32.

[0064] In some embodiments of this utility model, such as Figure 4 As shown, the heating element module 3 also includes a third heating element 33 located at the top of the cooking chamber 11.

[0065] By setting a third heating element 33, the upper space of the cooking chamber 11 can be heated, and the first heating element 31 heats the bottom wall 12 of the chamber. The first heating element 31 and the third heating element 33 can make the temperature of the cooking chamber 11 more even and improve the cooking effect.

[0066] In some embodiments of this utility model, such as Figure 4 As shown, the heating element module 3 also includes a fourth heating element 34 located at the top of the cooking chamber 11, and the heating power of the fourth heating element 34 is greater than that of the third heating element 33.

[0067] By designing the heating power of the fourth heating element 34 to be greater than that of the third heating element 33, and by differentiating the operation of the third heating element 33 and the fourth heating element 34, the functionality of the cooking equipment 100 can be further improved. This can also improve the problem of food burning caused by the inability of the third heating element 33 and the fourth heating element 34 with the same power to adjust the baking temperature.

[0068] For example, the third heating element 33 works alone, slowly baking the food; for example, the fourth heating element 34 works alone, baking the food at a medium speed; for example, the third heating element 33 and the fourth heating element 34 work together to quickly bake the food, which can quickly increase the food temperature and improve efficiency.

[0069] In some embodiments of this utility model, such as Figure 4 As shown, the third heating element 33 is arranged around the fourth heating element 34, and the fourth heating element 34 is located on the side of the third heating element 33 near the center of the cooking chamber 11.

[0070] The fourth heating element 34 has a higher power and is located near the center of the cooking chamber 11, which can concentrate the heat and quickly raise the temperature of the food.

[0071] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the heating element module 3 also includes a second heating element 32 for heating the bottom wall 12 of the chamber. The heating power of the second heating element 32 is greater than that of the first heating element 31. The second heating element 32 is arranged around the first heating element 31, and the first heating element 31 is located on the side of the second heating element 32 near the middle of the bottom wall 12 of the chamber.

[0072] The heating element module 3 also includes a third heating element 33 and a fourth heating element 34 located at the top of the cooking chamber 11. The heating power of the fourth heating element 34 is greater than that of the third heating element 33. The third heating element 33 is arranged around the fourth heating element 34, and the fourth heating element 34 is located on the side of the third heating element 33 closer to the center of the cooking chamber 11.

[0073] In this way, by setting the lower-power first heating element 31 and the higher-power fourth heating element 34 opposite each other in the vertical direction, and setting the higher-power second heating element 32 and the lower-power third heating element 33 opposite each other, the temperature uniformity can be improved, the situation of food being locally scorched due to excessively high temperature in a certain place can be improved, and the working reliability of the cooking equipment 100 can be improved.

[0074] In some embodiments of this utility model, the cooking device 100 has a steaming mode, in which the steam heating element 21 operates intermittently and the first heating element 31 operates intermittently.

[0075] The steam generator 2 produces high-temperature steam to cook food. The first heating element 31 heats the bottom wall 12 of the chamber, which can increase the temperature inside the cooking chamber 11 and reheat the condensate on the bottom wall 12 into steam. However, the volume of the cooking chamber 11 is limited. When there is enough steam in the cooking chamber 11, the continuous operation of the steam heating element 21 and the first heating element 31 has limited effect on increasing the heating speed of the food, and may even increase energy consumption.

[0076] Therefore, setting both the steam heating element 21 and the first heating element 31 to operate intermittently can meet the normal operation of the steaming mode, ensure the high-efficiency operation of the cooking equipment 100, and also save energy and reduce energy consumption.

[0077] In some embodiments of this utility model, the steaming mode includes multiple sequentially running stages, including a first stage when the device is turned on. The running time of the first stage is a first set time. In the first stage, the steam heating element 21 runs for the first set time and the first heating element 31 runs for the first set time.

[0078] The cooking mode includes multiple operating stages, including the first stage, which is the start stage. In the first stage, the steam heating element 21 operates for the entire duration of the first stage, and the steam heating element 21 continuously heats the steam chamber 221 for a first set time; the first heating element 31 operates for the entire duration of the first stage, and the first heating element 31 continuously heats the bottom wall 12 of the chamber for a first set time.

[0079] In the first stage, the steam heating element 21 operates continuously, continuously heating the steam chamber 221, causing the steam generator 2 to produce steam; the first heating element 31 operates continuously, preheating the cooking chamber 11 and increasing the food heating speed.

[0080] In some embodiments of this utility model, multiple operating stages include a second stage, the operating time of the second stage is a second set duration, and in the second stage, the operating time of the steam heating element 21 and the operating time of the first heating element 31 are both shorter than the second set duration.

[0081] The steaming / cooking mode includes multiple operating stages, including a second stage, which follows the first stage. In the first stage, the steam heating element 21 has been continuously heating the steam chamber 221 for a first set time, and the temperature inside the steam chamber 221 is already high enough to continuously generate steam. At the same time, the first heating element 31 has been continuously heating the bottom wall 12 of the chamber for a first set time, and the temperature inside the cooking chamber 11 is already high enough to heat the food.

[0082] Therefore, in the second stage, the steam heating element 21 and the first heating element 31 do not need to operate continuously. The steam heating element 21 and the first heating element 31 can switch to intermittent operation, so that the operating time of the steam heating element 21 and the operating time of the first heating element 31 are both shorter than the operating time of the second stage.

[0083] The intermittent operation of the steam heating element 21 and the first heating element 31 can also enable the steam generator 2 to continuously generate high-temperature steam and stabilize the temperature in the cooking chamber 11, which can meet the normal operation of the steaming mode, meet the high-efficiency operation of the cooking equipment 100, and also save energy and reduce energy consumption.

[0084] In some embodiments of this utility model, such as Figures 5-7 As shown, the steam generator 2 includes a fluid pipe 22 and a heat-conducting element 23. The fluid pipe 22 defines a steam chamber 221 and has at least one fluid bend 222. The steam heating element 21 is formed in a tubular shape and has at least one heating bend 211. One of the fluid bend 222 and the heating bend 211 is located radially inside the other. A heat-conducting gap 2a is provided between the heating bend 211 and the fluid bend 222. At least a portion of the heat-conducting element 23 fills the heat-conducting gap 2a.

[0085] The fluid pipe 22 has at least one fluid bend 222, and at least part of the fluid pipe 22 is constructed as an annular structure. Compared with setting the fluid pipe 22 as a straight pipe, the fluid pipe 22 with an annular structure occupies less space and is easier to arrange.

[0086] The steam heating element 21 also has at least one heating bend 211, which cooperates with the fluid bend 222. The fluid bend 222 can be located radially inside the heating bend 211, and the heating bend 211 heats the fluid inside the inner fluid bend 222; alternatively, the heating bend 211 can be located radially inside the fluid bend 222, and the heating bend 211 heats the fluid inside the outer fluid bend 222. By including the steam heating element 21 with the heating bend 211 and the fluid bend 222 in cooperation, the degree of cooperation between the heating bend 211 and the fluid bend 222 can be improved, which is beneficial to reducing the heat transfer distance and improving the heating effect of the steam heating element 21 on the fluid pipe 22.

[0087] A thermally conductive gap 2a is provided between the heating bend 211 and the fluid bend 222. At least a portion of the heat-conducting element 23 fills the thermally conductive gap 2a. The heating bend 211 transfers heat to the fluid bend 222 through the heat-conducting element 23, thereby heating the fluid flowing through the fluid pipe 22. Compared to heat transfer through air, filling the thermally conductive gap 2a with the heat-conducting element 23 can improve the heat transfer efficiency between the steam heater 21 and the fluid bend 222.

[0088] In some embodiments of this utility model, such as Figure 6 and Figure 7 As shown, in the radial direction of fluid pipe 22, the minimum value C of thermally conductive gap 2a ranges from 3 to 8 mm.

[0089] It is understandable that the fluid near the wall of the fluid pipe 22 has a better heating effect. The fluid bend 222 structure of the fluid pipe 22 in this embodiment of the present invention can generate Dean's vortex when the fluid flows in the fluid bend 222, so that the flow trajectory of the fluid is spiral, which disturbs the fluid near the wall of the fluid bend 222, increases the amount of fluid in contact with the wall, thereby enhancing the heat exchange capacity between the fluid and the high temperature wall, thereby improving the heating effect of the fluid and improving the steam generation efficiency.

[0090] The size of the thermally conductive gap 2a between the heating bend 211 and the fluid bend 222 also affects the steam generation efficiency. When the thermally conductive gap 2a between the heating bend 211 and the fluid bend 222 is too small, the temperature of the pipe wall of the fluid bend 222 near the heating bend 211 is too high. The fluid in the fluid bend 222 near the pipe wall of the heating bend 211 sublimates rapidly, forming a continuous vapor film that separates the liquid fluid from the pipe wall of the fluid bend 222, resulting in a decrease in heat transfer efficiency and thus a decrease in the steam generation efficiency of the steam generator 2. Conversely, when the thermally conductive gap 2a between the heating bend 211 and the fluid bend 222 is too large, the heat transfer path between the heating bend 211 and the fluid bend 222 is too long, requiring a longer time for the pipe wall of the fluid bend 222 to reach the target temperature. This leads to a decrease in the heating efficiency of the fluid in the fluid pipe 22, which also reduces the steam generation efficiency of the steam generator 2.

[0091] Therefore, both excessively large and excessively small thermal gaps 2a between the heating bend 211 and the fluid bend 222 are detrimental to steam generation. By setting the minimum value C of the thermal gap 2a to 3-8 mm, the heat transfer path between the heating bend 211 and the fluid bend 222 can be reduced, shortening the time required for the wall of the fluid bend 222 to reach the target temperature. At the same time, the temperature of the wall of the fluid bend 222 will not be too high, which would cause film boiling, thus improving the heat transfer efficiency and increasing the steam generation efficiency of the steam generator 2.

[0092] Optionally, the minimum value C of the thermally conductive gap 2a can be 3mm, 4mm, 4.2mm, 4.5mm, 5mm, 8mm, etc.

[0093] In some embodiments of this utility model, such as Figure 6 and Figure 7As shown, the heating bend 211 is located radially inside the fluid bend 222, and the ratio R1 / R2 of the radius R1 of the heating bend 211 and the radius R2 of the fluid bend 222 ranges from 2 / 3 to 3 / 4.

[0094] The heating bend 211 heats the fluid inside the outer fluid bend 222. The heating bend 211 is located on the radial inner side of the fluid bend 222 and does not occupy the radial outer space of the fluid bend 222. This helps to reduce the volume of the fluid bend 222 and the heating bend 211, which can meet the miniaturization requirements of the steam generator 2 and facilitate the arrangement and assembly of the steam generator 2.

[0095] It is worth noting that the radius R1 of the heated bend 211 refers to the bending radius of the heated bend 211, such as... Figure 6 As shown, the radial dimension is the distance from the center of the heating bend 211 to the center of its diameter. Similarly, the radius R2 of the fluid bend 222 refers to its bending radius. Figure 6 As shown, this is the radial dimension from the center of the fluid bend 222 to the center of the diameter of the fluid bend 222.

[0096] The heating bend 211 is located radially inside the fluid bend 222. Therefore, the radius R1 of the heating bend 211 is limited by the radius R2 of the fluid bend 222, meaning R1 is smaller than R2. However, if R1 is too small, the overall length of the heating bend 211 will decrease, reducing its heating capacity. This necessitates increasing the power density of the heating bend 211 to meet steam generation requirements, leading to increased consumption and potentially causing localized overheating, thus reducing the operational reliability of the steam generator 2. Conversely, if R2 is too large, the thermal gap 2a will be too small, also resulting in decreased heat transfer efficiency.

[0097] Therefore, setting the radius R1 of the heating bend 211 and the radius R2 of the fluid bend 222 to R1 / R2 of 2 / 3-3 / 4 is optimal. This can reduce power consumption and improve the reliability of the steam generator 2 while meeting the working requirements of the steam generator 2.

[0098] Optionally, the ratio R1 / R2 of the radius R1 of the heating bend 211 and the radius R2 of the fluid bend 222 can be 0.68, 0.7, 0.72, 0.73, 0.75, etc.

[0099] In some embodiments of this utility model, the radius R1 of the heating bend 211 ranges from 20 to 40 mm, and the radius R2 of the fluid bend 222 ranges from 30 to 60 mm.

[0100] A smaller radius of fluid bend 222 can enhance the Dean vortex induced inside the tube, which can improve the heat exchange efficiency between the fluid inside the fluid bend 222 and the high-temperature wall. However, if the radius R2 of fluid bend 222 is too small, the overall length of fluid bend 222 will decrease, which will lead to a reduction in the heat exchange path of the fluid inside fluid bend 222, which will reduce the heating effect on the fluid.

[0101] Therefore, it is optimal to design the radius R2 of the fluid bend 222 to be 30-60mm. A smaller radius of the fluid bend 222 can enhance the Dean vortex induced inside the pipe, which can improve the heat exchange efficiency between the fluid and the high-temperature wall inside the fluid bend 222. It can also meet the heat exchange path length of the fluid bend 222, so that the fluid can fully exchange heat inside the fluid bend 222, which is beneficial to improving the heat exchange efficiency of the fluid.

[0102] Optionally, the radius R2 of the fluid bend 222 can be 30mm, 35mm, 40mm, 50mm, 60mm, etc.

[0103] The heating bend 211 is located radially inside the fluid bend 222, so the radius R1 of the heating bend 211 is limited by the radius R2 of the fluid bend 222. However, both excessively small R1 and excessively large R2 will lead to a decrease in heat transfer efficiency. Therefore, when the radius R2 of the fluid bend 222 is in the range of 30-60mm, it is optimal to design the radius R1 of the heating bend 211 to be 20-40mm to improve heat transfer efficiency.

[0104] Optionally, the radius R1 of the heating bend 211 can be 20mm, 28mm, 30mm, 35mm, 40mm, etc.

[0105] In some embodiments of this utility model, such as Figure 6 As shown, the ratio of the diameter D1 of the steam heating element 21 to the radius R1 of the heating bend 211, D1 / R1, ranges from 1 / 4 to 4 / 15.

[0106] When the ratio D1 / R1 of the diameter D1 of the steam heating element 21 to the radius R1 of the heating bend 211 is too large, the power density of the steam heating element 21 decreases, and the heat is not easily dissipated, reducing the heat transfer efficiency. Conversely, when the ratio D1 / R1 of the diameter D1 of the steam heating element 21 to the radius R1 of the heating bend 211 is too small, the diameter D1 of the steam heating element 21 is too small, and the power density of the steam heating element 21 increases, which will cause the local temperature to rise. Alternatively, when the radius R1 of the steam heating element 21 is too large, it increases the space occupied and is not easy to match with the fluid bend 222.

[0107] Therefore, setting the ratio D1 / R1 of the diameter D1 of the steam heating element 21 to the radius R1 of the heating bend 211 to be relatively small, and setting D1 / R1 to 1 / 4-4 / 15 is optimal, can reduce the space occupied by the heating bend 211, and the power density of the heating bend 211 is appropriate, which can improve the heating speed of the fluid without causing local overheating, and improve the working reliability of the steam heating element 21.

[0108] In some embodiments of this utility model, the diameter D1 of the steam heating element 21 ranges from 5 to 10 mm, and the radius R1 of the heating bend 211 ranges from 20 to 40 mm.

[0109] When the power of the steam heating element 21 is the same, the power density of the steam heating element 21 increases as the diameter D1 of the steam heating element 21 decreases. Therefore, setting a smaller diameter D1 of the steam heating element 21 is beneficial to improving the heating effect on the fluid in the fluid bend 222. Furthermore, setting a smaller diameter D1 of the steam heating element 21 also helps to reduce the space occupied by the steam heating element 21, facilitating its integration with the fluid pipe 22 and improving the integration of the steam generator 2. However, if the diameter D1 of the steam heating element 21 is too small, the local temperature of the steam heating element 21 may become excessively high, posing a risk of damage to the steam heating element 21.

[0110] Therefore, setting the diameter D1 of the steam heating element 21 to be relatively small, and designing the diameter D1 of the steam heating element 21 to be 5-10mm is optimal. This can reduce the space occupied by the heating bend 211, and the power density of the heating bend 211 is appropriate, which can improve the heating speed of the fluid without causing local overheating, and improve the working reliability of the steam heating element 21.

[0111] Optionally, the diameter D1 of the steam heating element 21 can be 5mm, 6mm, 8mm, 8.5mm, 10mm, etc.

[0112] If the radius R1 of the heating bend 211 is too small, the overall length of the heating bend 211 will decrease, and the heating capacity of the heating bend 211 will decline. This necessitates increasing the power density of the heating bend 211 to meet the steam generation requirements, leading to increased consumption and potentially causing localized overheating, thus reducing the operational reliability of the steam generator 2. Conversely, if R2 is too large, the thermal gap 2a will become too small, also resulting in decreased heat transfer efficiency.

[0113] The ratio of the diameter D1 of the steam heating element 21 to the radius R1 of the heating bend 211, D1 / R1, ranges from 1 / 4 to 4 / 15. Based on the diameter D1 of the steam heating element 21 being in the range of 5-10mm, the radius R1 of the heating bend 211 is designed to be 20-40mm, and a larger design is better, which can improve the heat transfer efficiency and is beneficial to improving the steam generation efficiency of the steam generator 2.

[0114] Optionally, the radius R1 of the heating bend 211 can be 20mm, 26mm, 30mm, 38mm, 40mm, etc.

[0115] In some embodiments of this utility model, such as Figure 6 As shown, the ratio of the diameter D2 of the fluid pipe 22 to the radius R2 of the fluid bend 222, D2 / R2, ranges from 1 / 5 to 1 / 2.

[0116] The ratio D2 / R2 of the diameter D2 of fluid pipe 22 and the radius R2 of fluid bend 222 will affect the formation and development of Dean vortex. The vortex intensity of Dean vortex increases monotonically with D2 / R2. Therefore, designing a larger ratio D2 / R2 of the diameter D2 of fluid pipe 22 and the radius R2 of fluid bend 222 is beneficial to enhancing the heat exchange capacity between the fluid and the high-temperature pipe wall.

[0117] However, when the ratio D2 / R2 of the diameter D2 of the fluid pipe 22 and the radius R2 of the fluid bend 222 is too large, the risk of Dean's vortex breaking and causing turbulent pulsation increases. Large particles of impurities in the fluid are more likely to deposit and clog the outside of the fluid bend 222, resulting in increased flow resistance. For example, when water flows inside the fluid bend 222, if the ratio D2 / R2 is too large, scale in the water is more likely to accumulate on the outside of the fluid bend 222.

[0118] Furthermore, if the ratio of the diameter D2 of the fluid pipe 22 to the radius R2 of the fluid bend 222, D2 / R2, is too large, it will cause the diameter D2 of the fluid pipe 22 to increase or the radius R2 of the fluid bend 222 to decrease, making heat exchange between the fluid and the fluid bend 222 difficult and affecting the steam generation efficiency.

[0119] Therefore, the ratio D2 / R2 of the diameter D2 of the fluid pipe 22 and the radius R2 of the fluid bend 222 is designed to be larger, and the value range is 1 / 5-1 / 2. This can improve the heat exchange efficiency between the fluid and the high-temperature pipe wall, and reduce the occurrence of blockage in the fluid bend 222.

[0120] In some embodiments of this utility model, the diameter D2 of the fluid pipe 22 ranges from 6 to 12 mm, and the radius R2 of the fluid bend 222 ranges from 30 to 60 mm.

[0121] A larger diameter fluid pipe 22 increases the cross-sectional area for fluid flow, reducing the likelihood of large particles clogging the pipe and improving the reliability of the steam generator 2. For example, when water flows within the fluid bend 222, a larger diameter pipe reduces the risk of scale buildup blocking water flow, thus increasing the steam generator 2's tolerance to scale and extending its lifespan. However, if the diameter D2 of the fluid pipe 22 is too large, the fluid may not be able to fully contact the high-temperature wall surface, leading to deteriorated heat transfer and potentially causing localized overheating and damage to the steam generator 2.

[0122] Therefore, designing the diameter D2 of the fluid pipe 22 to be 6-12mm is optimal. This can increase the cross-sectional area for fluid flow, reduce the risk of blockage inside the fluid pipe 22, and allow for sufficient heat exchange between the fluid and the fluid pipe 22, thereby improving the operational reliability of the fluid pipe 22.

[0123] Optionally, the diameter D2 of the fluid pipe 22 can be 6mm, 8mm, 8.5mm, 10mm, 12mm, etc.

[0124] A smaller radius of fluid bend 222 can enhance the Dean vortex induced inside the tube, which can improve the heat exchange efficiency between the fluid inside the fluid bend 222 and the high-temperature wall. However, if the radius R2 of fluid bend 222 is too small, the overall length of fluid bend 222 will decrease, which will lead to a reduction in the heat exchange path of the fluid inside fluid bend 222, which will reduce the heating effect on the fluid.

[0125] The ratio of the diameter D2 of the fluid pipe 22 to the radius R2 of the fluid bend 222, D2 / R2, ranges from 1 / 5 to 1 / 2. Based on the diameter D2 of the fluid pipe 22 being in the range of 6-12mm, it is optimal to design the radius R2 of the fluid bend 222 to be 30-60mm. A smaller radius of the fluid bend 222 can enhance the Dean vortex induced inside the pipe, which can improve the heat exchange efficiency between the fluid and the high-temperature wall inside the fluid bend 222. It can also meet the heat exchange path length of the fluid bend 222, allowing the fluid to fully exchange heat inside the fluid bend 222, which is beneficial to improving the heat exchange efficiency of the fluid.

[0126] Optionally, the radius R2 of the fluid bend 222 can be 30mm, 38mm, 40mm, 45mm, 60mm, etc.

[0127] In some embodiments of this utility model, such as Figure 5 As shown, the heat-conducting component 23 at least completely encloses the fluid bend 222 and the heating bend 211, and the heat-conducting component 23 is fixed to the housing 1 by the mounting bracket 231.

[0128] The heat-conducting component 23 completely encloses the fluid bend 222 and the heating bend 211, thereby improving the heat transfer performance between the heating bend 211 and the fluid bend 222. The heating bend 211 can fully heat the fluid bend 222 to ensure that the liquid fluid in the fluid pipe 22 can be effectively converted into gaseous fluid, thus fully meeting the needs of use.

[0129] Furthermore, the heat-conducting component 23 completely encloses the fluid bend 222 and the heating bend 211, which can also protect the fluid bend 222 and the heating bend 211, reduce the interference of the external environment on the fluid bend 222 and the heating bend 211, and improve the working reliability of the steam generator 2.

[0130] The heat-conducting component 23 is fixed to the housing 1 by the mounting bracket 231. The mounting bracket 231 securely installs the steam generator 2, which can stably arrange the steam generator 2 and improve the working reliability of the steam generator 2.

[0131] In some embodiments of this utility model, such as Figure 5 As shown, the heat-conducting component 23 is a die-cast aluminum shell.

[0132] During the production and assembly of the steam generator 2, the fluid pipe 22 and the steam heating element 21 are joined together and formed into a die-cast aluminum shell through die casting. At least the heating bend 211 and the fluid bend 222 are die-cast together to form the overall structure of the steam generator 2. The die-cast aluminum parts are lightweight and easy to install. In addition, the die-cast aluminum shell has good thermal conductivity. The die-cast aluminum shell encloses the steam heating element 21 and the fluid pipe 22, transferring the heat generated by the steam heating element 21 to the fluid in the fluid pipe 22. The die-cast aluminum shell uses a die-casting process to ensure that there are no gaps between the die-cast aluminum shell and the fluid pipe 22 and the steam heating element 21 to ensure heat exchange efficiency.

[0133] A specific embodiment of the cooking device 100 of this utility model is described below with reference to the accompanying drawings.

[0134] Cooking equipment 100 includes: a housing 1, a steam generator 2, and a heating element module 3. The housing 1 contains a cooking chamber 11, which has a bottom wall 12. The steam generator 2 includes a steam heating element 21 and a fluid pipe 22. The fluid pipe 22 defines a steam chamber 221. The steam heating element 21 heats the steam chamber 221 to generate steam. The steam chamber 221 has a steam outlet 2211 communicating with the cooking chamber 11. The steam outlet 2211 enters the cooking chamber 11 through a two-part inlet pipe 4, with the steam entering through the inlets on the left and right sides respectively. The operating power of the steam heating element 21 is P. 蒸 It is 2600W.

[0135] The heating element module 3 includes a first heating element 31 and a second heating element 32 for heating the bottom wall 12 of the chamber. The heating power of the second heating element 32 is greater than that of the first heating element 31. The second heating element 32 is arranged around the first heating element 31, and the first heating element 31 is located on the side of the second heating element 32 near the middle of the bottom wall 12 of the chamber. The heating element module 3 also includes a third heating element 33 and a fourth heating element 34 located at the top of the cooking chamber 11. The heating power of the fourth heating element 34 is greater than that of the third heating element 33. The third heating element 33 is arranged around the fourth heating element 34, and the fourth heating element 34 is located on the side of the third heating element 33 near the center of the cooking chamber 11.

[0136] The heating element module 3 heats the cooking chamber 11. The heating element module 3 and the steam generator 2 can operate independently, allowing for individual cooking of food, or they can operate simultaneously to cook food together, thus enhancing the functionality of the cooking equipment 100. Furthermore, the heating element module 3 also improves the working efficiency of the steam generator 2. The steam generator 2 delivers high-temperature steam to the cooking chamber 11, where the temperature is relatively low, causing the steam temperature to drop and increasing the heating time for food. By using the heating element module 3 to heat the cooking chamber 11, the temperature inside the cooking chamber 11 is increased, and the high-temperature steam can maintain a higher temperature, thus rapidly heating the food and improving cooking efficiency.

[0137] The operating power P of steam generator 2 蒸 The total operating power of the steam generator 2 and the heating element module 3 shall not exceed 3050W. The maximum power of the household cooking appliance 100 cannot exceed 3500W. Assuming it operates at 90% of its rated power, i.e., 3150W, and reserving 100W for the cooling system, control board, and display board, 3050W remains. Therefore, this embodiment limits the total operating power of the steam generator 2 and the heating element module 3 to no more than 3050W, which improves the efficiency of the cooking appliance 100 while ensuring its safe operation.

[0138] The operating power of the first heating element 31 is 450W, the operating power of the second heating element 32 is 900W, the operating power of the third heating element 33 is 800W, and the operating power of the fourth heating element 34 is 1200W. Considering the maximum power limit of 3050W, the operating power P of the steam generator 2 is set at... 蒸 Setting it to 2600W can improve the steam generation efficiency of steam generator 2.

[0139] When the steam generator 2 is working, only the first heating element 31 is controlled to work simultaneously, while the second heating element 32, the third heating element 33 and the fourth heating element 34 are not working, so the power will not exceed 3050W.

[0140] When the steam generator 2 is not working, one or more of the first heating element 31, the second heating element 32, the third heating element 33 and the fourth heating element 34 can be controlled to work, which can heat the cooking cavity and limit the working power to no more than 3050W.

[0141] The cooking device 100 of this utility model consumes 600g of water per hour and has a heating time of 230s at 100 degrees Celsius. Compared with the original model, the heating time is shortened by 40%, and the water accumulation at the bottom is reduced from 187g to 10g. Users do not need to clean the water at the bottom, as the heat stored inside the cavity can evaporate the last remaining condensate. Furthermore, the heating time for steaming frozen buns and 200g steamed buns is shortened by 36% compared with the original model.

[0142] A specific embodiment of the cooking device 100 of this utility model, Figure 12 By comparing the temperature rise curves of the furnace core after increasing the power of the steam generator 2 to 2600W, it can be shown that within the limited heating power of 3050W in this embodiment of the present invention, increasing the power of the steam generator 2 and setting the heating tube module 3 can effectively shorten the heating rate of the furnace core and improve cooking efficiency.

[0143] The control method applied to the above-described cooking equipment 100 is described below with reference to the accompanying drawings.

[0144] like Figure 8 As shown, the control method includes: receiving a steaming command and detecting the temperature inside the cooking chamber 11; when the detected temperature is lower than the first set temperature T1, first controlling the steam heating element 21 to run for a first set time t1 and the first heating element 31 to run for a first set time t1; after the first set time, controlling the steam heating element 21 and the first heating element 31 to run intermittently.

[0145] The temperature inside the cooking chamber 11 is detected. When the detected temperature is lower than the first set temperature T1, the steam heating element 21 is controlled to run for a first set time t1 to heat the steam chamber 221, and the first heating element 31 runs for a first set time t1 to heat the bottom wall 12 of the chamber.

[0146] The steam heating element 21 operates continuously for a first set time t1, and the temperature inside the steam chamber 221 is already high enough to continuously generate steam; the first heating element 31 operates continuously for a first set time t1, and the temperature inside the cooking chamber 11 is already high enough to heat the food.

[0147] Therefore, after the first set time, the steam heating element 21 and the first heating element 31 do not need to operate continuously, and can be controlled to operate intermittently. The intermittent operation of the steam heating element 21 and the first heating element 31 also allows the steam generator 2 to continuously generate high-temperature steam, and stabilizes the temperature inside the cooking chamber 11, which can meet the normal operation of the steaming mode, the high-efficiency operation of the cooking equipment 100, and also save energy and reduce energy consumption.

[0148] In some embodiments of this utility model, such as Figure 9 As shown, the cooking device 100 includes multiple operating stages. A first set duration is the first stage, followed by a second stage. The operating time of the second stage is a second set duration t2. The control method includes: detecting the temperature inside the cooking chamber 11; when the detected temperature is lower than the second set temperature T2, controlling the steam heating element 21 to operate for a first operating time t11; when the detected temperature is lower than a third set temperature T3, controlling the steam heating element 21 to operate for a second operating time t12; when the detected temperature is higher than the third set temperature T3 but lower than a fourth set temperature T4, controlling the steam heating element 21 to operate for a third operating time t13; and when the detected temperature is higher than the fourth set temperature T4, controlling the steam heating element 21 to operate for a fourth operating time t14, where T2... <T3<T4<T1,t14<t13<t12<t11<t2。

[0149] The cooking mode includes multiple operating stages, including a first stage and a second stage. The first stage is when the steam heating element 21 operates for a first set time t1 and the first heating element 31 operates for a first set time t1. The second stage is the stage following the first stage.

[0150] In the first stage, the steam heating element 21 has been continuously heating the steam chamber 221 for a first set time. The temperature inside the steam chamber 221 is already high, and water vapor can be continuously generated. At the same time, the first heating element 31 has been continuously heating the bottom wall 12 of the chamber for a first set time. The temperature inside the cooking chamber 11 is already high, and food can be heated.

[0151] Therefore, in the second stage, the steam heating element 21 and the first heating element 31 do not need to operate continuously. The steam heating element 21 and the first heating element 31 can switch to intermittent operation, so that the operating time of the steam heating element 21 and the operating time of the first heating element 31 are both shorter than the operating time t2 of the second stage.

[0152] In the second stage, multiple temperature gradients are selected, including a second set temperature T2, a third set temperature T3, and a fourth set temperature T4, wherein the second set temperature T2 is lower than the third set temperature T3, and the third set temperature T3 is lower than the fourth set temperature T4.

[0153] When the temperature inside the cooking chamber 11 is detected to be lower than the second set temperature T2, the steam heating element 21 is controlled to run for a first running time t11. The second set temperature T2 is the lowest in the temperature gradient of the second stage, indicating that a large amount of high-temperature steam is needed to quickly heat the food. Therefore, the steam heating element 21 is controlled to run for a first running time t11, which is the longest among the first to fourth running times.

[0154] When the temperature inside the cooking chamber 11 is detected to be lower than the third set temperature T3, the steam heating element 21 is controlled to run for a second running time t12. The third set temperature T3 is moderate in the temperature gradient of the second stage, and it is determined that a normal amount of high-temperature steam is needed to heat the food. Therefore, the steam heating element 21 is controlled to run for a second running time t12, which is the second longest running time among the first to fourth running times.

[0155] When the temperature inside the cooking chamber 11 is detected to be higher than the third set temperature T3 but lower than the fourth set temperature T4, the steam heating element 21 is controlled to run for a third running time t13. The third set temperature T3 is the second highest in the temperature gradient of the second stage, indicating that a small amount of high-temperature steam is needed to heat the food. Therefore, the steam heating element 21 is controlled to run for a third running time t13, which is the second shortest among the first to fourth running times.

[0156] When the detected temperature is higher than the fourth set temperature T4, the steam heater 21 is controlled to run for a fourth running time t14. The fourth set temperature T4 is the highest in the temperature gradient of the second stage, indicating that it may not be the initial use of the steaming mode, but rather a re-entry into the steaming mode. It is determined that a small amount of high-temperature steam is sufficient, therefore the steam heater 21 is controlled to run for a fourth running time t14, which is the shortest among the first to fourth running times.

[0157] In the second stage, the cooking equipment 100 can perform different operations according to the temperature inside the cooking chamber 11, which not only meets the usage requirements of the cooking equipment 100 and improves the cooking effect, but also reduces energy consumption.

[0158] In some embodiments of this utility model, such as Figure 4 As shown, the heating element module 3 also includes a top heating module 3a located at the top of the cooking chamber 11, such as... Figure 9 As shown, when the detected temperature is lower than the second set temperature T2, when controlling the steam heating element 21 to run for the first running time t11, the method further includes: turning off the steam heating element 21 after the steam heating element 21 runs for the first running time t11; and controlling the top heating module 3a to run for the fifth running time t15.

[0159] The heating element module 3 also includes a top heating module 3a located at the top of the cooking chamber 11. For example, the top heating module 3a includes the third heating element 33 and the fourth heating element 34 mentioned above. The third heating element 33 and the fourth heating element 34 can heat the cooking chamber 11, quickly increase the temperature inside the cooking chamber 11, and help increase the food heating speed.

[0160] When the temperature inside the cooking chamber 11 is detected to be lower than the second set temperature T2, which is the lowest in the second stage of the temperature gradient, it is determined that the food needs to be heated rapidly. Therefore, not only is the steam heating element 21 controlled to run for a longer period of time to generate a large amount of high-temperature steam, but the top heating module 3a is also controlled to run for a fifth running time t15, thereby enabling the food to heat up rapidly.

[0161] It is worth noting that the operating power of the steam heating element 21 of the cooking equipment 100 is P 蒸 The steam level is relatively high, and even after the steam heating element 21 stops operating for a period of time, steam will continue to be generated for a while. Therefore, to protect the cooking equipment 100 from operating below the power limit, the steam heating element 21 is turned off after running for a first operating time t 11. After turning off the steam heating element 21, the top heating module 3a is then controlled to run for a fifth operating time t 15. This allows the food to heat up quickly and limits the operating power of the cooking equipment 100 from falling below the limit power.

[0162] In some embodiments of this utility model, t15 = t2 - t11. In the second stage, when the detected temperature is lower than the second set temperature T2, the steam heating element 21 and the top heating module 3a operate sequentially, and the operating time is equal to the operating time of the second stage, thereby allowing the food to heat up quickly.

[0163] In some embodiments of this utility model, such as Figure 10 As shown, the multiple operating stages include a third stage following the second stage; in the third stage, the temperature inside the cooking chamber 11 is detected; when the detected temperature is lower than the fifth set temperature T5, the steam heating element 21 is controlled to run for a sixth operating time t16; when the detected temperature is higher than the fifth set temperature T5, the steam heating element 21 is controlled to run for a seventh operating time t17, where t16 > t17.

[0164] The steaming / cooking mode includes multiple operating stages, with the third stage being the stage following the second stage.

[0165] In the second stage, the steam heating element 21 has been operating for a period of time based on the detected temperature inside the cooking chamber 11, so that the food is heated to a certain temperature.

[0166] Therefore, in the third stage, the steam heating element 21 operates again as needed, thereby achieving heat preservation or secondary cooking and improving the cooking effect.

[0167] The third stage includes two temperature gradient selections, either below or above the fifth set temperature, and two running times, with the sixth running time t16 being longer than the seventh running time t17.

[0168] When the temperature inside the cooking chamber 11 is lower than the fifth set temperature T5, the steam heating element 21 is controlled to run for a sixth running time t16. When the detected temperature is higher than the fifth set temperature T5, the steam heating element 21 is controlled to run for a seventh running time t17, thereby achieving heat preservation or secondary cooking and improving the cooking effect.

[0169] In some embodiments of this utility model, after a first set time, the start-up time of the steam heating element 21 and the first heating element 31 is the same, and the running time of the first heating element 31 is greater than the running time of the steam heating element 21.

[0170] In the second and third stages following the first stage, when the steam generator 2 is running, the first heating element 31 is also running simultaneously, and the running time of the first heating element 31 is greater than the running time of the steam heating element 21.

[0171] The first heating element 31 and the steam heating element 21 work together. When the steam heating element 21 is running, it will continuously supply water vapor to the cooking chamber 11, which will form condensate on the bottom wall 12 of the chamber. By controlling the first heating element 31 and the steam heating element 21 to run simultaneously, the bottom wall 12 of the chamber can be heated for a long time, and the condensate accumulated on the bottom wall 12 of the chamber can be reheated into steam, reducing the accumulation of condensate.

[0172] Furthermore, even after the steam heating element 21 stops operating for a period of time, water vapor will continue to be generated for a period of time. Therefore, by controlling the operating time of the first heating element 31 to be greater than the operating time of the steam heating element 21, the condensate generated subsequently can be continuously heated, thereby reducing the accumulation of condensate.

[0173] In some embodiments of this utility model, such as Figure 11 As shown, the multiple operating stages include a fourth stage following the third stage; in the fourth stage, the temperature inside the cooking chamber 11 is detected; when the detected temperature is lower than the sixth set temperature T6, the steam heating element 21 is controlled to run for an eighth operating time t18; when the detected temperature is higher than the sixth set temperature T6, the steam heating element 21 is controlled to run for a ninth operating time t19, where t18 > t19, and the sixth set temperature T6 is greater than the fifth set temperature T5.

[0174] The fourth stage is an optional stage. Generally, food is cooked after going through the first to third stages. However, some foods require long cooking times and need to enter the fourth stage. In the fourth stage, the sixth temperature setting T6 is greater than the fifth temperature setting T5. Therefore, the food is cooked at a high temperature for a long time in this stage to further cook it and improve the cooking effect.

[0175] In some embodiments of this utility model, such as Figure 11 As shown, the multiple operating stages include a fifth stage following the fourth stage; in the fifth stage, the temperature inside the cooking chamber 11 is detected; when the detected temperature is lower than the sixth set temperature T6, the steam heating element 21 is controlled to run for a tenth operating time t110; when the detected temperature is higher than the sixth set temperature T6, the steam heating element 21 is controlled to run for an eleventh operating time t111, where t110 > t111.

[0176] The fifth stage is an optional stage. Generally, food is cooked after going through the first to fourth stages. The fifth stage is the finishing touch on the cooking process and can improve the cooking effect.

[0177] The following is a reference appendix. Figure 11 This invention describes a control method for a cooking device 100 according to a specific embodiment of the present invention.

[0178] Appendix Figure 11 In this system, the operating cycle of both the steam heating element 21 and the heating tube module 3 is 30 seconds. The start point refers to when the corresponding device is turned on within an operating cycle. For example, start point 0 means turning on at second 0, and start point 19 means turning on at second 19. It is worth noting that the operating cycle is not limited to 30 seconds and can be limited according to actual conditions. The running time of these operating stages in the first phase can also be limited according to actual conditions.

[0179] The steam setting refers to the operating time of the steam heating element 21, in seconds; the lower inner on / off ratio refers to the operating time of the first heating element 31, in seconds; the lower outer on / off ratio refers to the operating time of the second heating element 32, in seconds; the upper inner on / off ratio refers to the operating time of the fourth heating element 34, in seconds; and the upper outer on / off ratio refers to the operating time of the third heating element 33, in seconds.

[0180] The cooking equipment 100 includes multiple operating stages, including a first stage, a second stage, and a third stage.

[0181] The first stage of operation lasts from 0 to 30 seconds after startup. During the first stage, the steam heating element 21 runs continuously for 30 seconds, the first heating element 31 runs continuously for 30 seconds, the temperature inside the steam chamber 221 is already high, and water vapor can be continuously generated. At the same time, the temperature inside the cooking chamber 11 is already high, and food can be heated.

[0182] The second stage of operation lasts from 30s to 420s after startup, with both the steam heating element 21 and the heating element module 3 operating for 30s. Since the steam generator 2 has been able to continuously generate steam in the first stage, and the temperature inside the cooking chamber 11 is already high, the steam heating element 21 and the heating element module 3 switch to intermittent operation.

[0183] When the temperature inside the cooking chamber 11 is detected to be below 50°C, in one operating cycle, the steam heating element 21 is first controlled to run for 22 seconds, and the first heating element 31 is controlled to run for 30 seconds. Then, at the 22nd second, the steam heating element 21 is stopped, and the third heating element 33 and the fourth heating element 34 are turned on. The third heating element 33 and the fourth heating element 34 run for 8 seconds.

[0184] The first heating element 31 has a working power of 450W, the second heating element 32 has a working power of 900W, the third heating element 33 has a working power of 800W, and the fourth heating element 34 has a working power of 1200W. When the steam generator 2 is working, only the first heating element 31 is controlled to work simultaneously, while the second heating element 32, the third heating element 33, and the fourth heating element 34 are not working, thus the power will not exceed 3050W. When the steam generator 2 is not working, the third heating element 33 and the fourth heating element 34 are controlled to work, which can heat the cooking cavity and limit the working power to no more than 3050W.

[0185] When the temperature inside the cooking chamber 11 is detected to be below 85°C, in one operating cycle, the steam heating element 21 is first controlled to run for 18 seconds, and the first heating element 31 is controlled to run for 18 seconds; then at the 19th second, the second heating element 32, the third heating element 33 and the fourth heating element 34 are simultaneously turned on, and the second heating element 32, the third heating element 33 and the fourth heating element 34 run for 10 seconds.

[0186] When the temperature inside the cooking chamber 11 is detected to be below 94°C, in one operating cycle, the steam heating element 21 is first controlled to run for 12 seconds, and the first heating element 31 is controlled to run for 18 seconds; then at the 19th second, the second heating element 32, the third heating element 33 and the fourth heating element 34 are turned on simultaneously, the second heating element 32 runs for 10 seconds, the third heating element 33 runs for 6 seconds, and the fourth heating element 34 runs for 5 seconds.

[0187] When the temperature inside the cooking chamber 11 exceeds 94°C, in one operating cycle, the steam heating element 21 is first controlled to run for 8 seconds, and the first heating element 31 is controlled to run for 20 seconds; then, at the 9th second, the second heating element 32 is simultaneously turned on.

[0188] The second heating element 32 runs for 10 seconds.

[0189] The third stage of operation lasts 420-600 seconds after startup, with both the steam heating element 21 and the heating element module 3 operating for 30 seconds. In the second stage, the steam heating element 21 has already operated for a period based on the detected temperature within the cooking chamber 11, heating the food to a certain temperature, thus essentially completing the cooking process. Therefore, the third stage has a shorter operating time, allowing the steam heating element 21 to operate again as needed, enabling heat preservation or secondary cooking and improving the cooking effect.

[0190] When the temperature inside the cooking chamber 11 is detected to be below 100°C, in one operating cycle, the steam heating element 21 is first controlled to run for 10 seconds, and the first heating element 31 is controlled to run for 22 seconds.

[0191] When the temperature inside the cooking chamber 11 is detected to be higher than 100°C, in one operating cycle, the steam heating element 21 is first controlled to run for 8 seconds, and the first heating element 31 is controlled to run for 15 seconds.

[0192] The operational phases include a fourth phase following the third phase, and a fifth phase following the fourth phase.

[0193] The third stage lasts for 600-1500 seconds after power-on, and the fifth stage lasts for 1500 seconds after power-on.

[0194] The fourth stage is optional. Generally, food is cooked after the first to third stages, but some foods require a long cooking time and need to enter the fourth or even fifth stage.

[0195] Other components of the cooking apparatus according to embodiments of the present invention, such as steam generators and heating elements, as well as their operation, are known to those skilled in the art and will not be described in detail here.

[0196] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0197] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cooking device, characterized in that, include: The housing includes a cooking chamber with a bottom wall. A steam generator is disposed within the housing. The steam generator includes a steam heating element and a steam chamber. The steam heating element heats the steam chamber to generate steam. The steam chamber has a steam outlet communicating with the cooking chamber. The operating power of the steam heating element is P. 蒸 P 蒸 ≥2600W; A heating element module is disposed within the cooking chamber. The heating element module includes a first heating element for heating the bottom wall of the chamber. The steam generator has a working power P. 蒸 The total operating power of the heating element module does not exceed 3050W.

2. The cooking apparatus according to claim 1, characterized in that, The heating element module further includes a second heating element for heating the bottom wall of the chamber, wherein the heating power of the second heating element is greater than that of the first heating element.

3. The cooking apparatus according to claim 2, characterized in that, The second heating element is disposed around the first heating element, and the first heating element is located on the side of the second heating element near the middle of the bottom wall of the chamber.

4. The cooking apparatus according to claim 1, characterized in that, The heating element module also includes a third heating element located at the top of the cooking chamber.

5. The cooking apparatus according to claim 4, characterized in that, The heating element module also includes a fourth heating element located at the top of the cooking chamber, the heating power of the fourth heating element being greater than that of the third heating element.

6. The cooking apparatus according to claim 5, characterized in that, The third heating element is arranged around the fourth heating element, and the fourth heating element is located on the side of the third heating element closer to the center of the cooking chamber.

7. The cooking apparatus according to claim 1, characterized in that, The cooking device has a steaming mode, in which the steam heating element operates intermittently and the first heating element operates intermittently.

8. The cooking apparatus according to claim 7, characterized in that, The cooking mode includes multiple sequentially running stages, including a first stage when the device is turned on. The duration of the first stage is a first set duration. In the first stage, the steam heating element runs for the first set duration and the first heating element runs for the first set duration.

9. The cooking apparatus according to claim 8, characterized in that, The multiple operating phases include a second phase, the operating time of which is a second set duration. In the second phase, the operating time of the steam heating element and the operating time of the first heating element are both shorter than the second set duration.

10. The cooking apparatus according to any one of claims 1-9, characterized in that, The steam generator includes a fluid pipe and a heat-conducting element, the fluid pipe defining the steam chamber, and the fluid pipe having at least one fluid bend; The steam heating element is formed in a tubular shape, the steam heating element has at least one heating bend, one of the fluid bend and the heating bend is located radially inside the other, a thermally conductive gap is formed between the heating bend and the fluid bend, and at least a portion of the thermally conductive element fills the thermally conductive gap.

11. The cooking apparatus according to claim 10, characterized in that, In the radial direction of the fluid pipe, the minimum value of the thermally conductive gap ranges from 3 to 8 mm.

12. The cooking apparatus according to claim 10, characterized in that, The heating bend is located radially inside the fluid bend, and the ratio of the radius of the heating bend to the radius of the fluid bend ranges from 2 / 3 to 3 / 4.

13. The cooking apparatus according to claim 12, characterized in that, The radius of the heating bend is in the range of 20-40mm, and the radius of the fluid bend is in the range of 30-60mm.

14. The cooking apparatus according to claim 10, characterized in that, The ratio of the diameter of the steam heating element to the radius of the heating bend ranges from 1 / 4 to 4 / 15.

15. The cooking apparatus according to claim 14, characterized in that, The diameter of the steam heating element is in the range of 5-10mm, and the radius of the heating bend is in the range of 20-40mm.

16. The cooking apparatus according to claim 10, characterized in that, The ratio of the diameter of the fluid pipe to the radius of the fluid bend ranges from 1 / 5 to 1 / 2.

17. The cooking apparatus according to claim 16, characterized in that, The diameter of the fluid pipe is in the range of 6-12mm, and the radius of the fluid bend is in the range of 30-60mm.

18. The cooking apparatus according to claim 10, characterized in that, The heat-conducting component at least completely encloses the fluid bend and the heating bend, and the heat-conducting component is fixed to the housing by a mounting bracket.

Images