Embedded steam cooking electric appliance

Abstract

The invention relates to the technical field of household appliances, and provides an embedded steam cooking appliance which comprises a cavity assembly, a steam generator and a steam generator. The first evaporation mechanism is arranged above the top of the cavity assembly, and the first evaporation mechanism is a main steam source; the second evaporation mechanism is arranged below the bottom of the cavity assembly, the second evaporation mechanism is an auxiliary steam source, when accumulated water is generated at the bottom of the cavity assembly, the second evaporation mechanism starts to work, and the accumulated water at the bottom of the cavity assembly can be heated and evaporated for the second time through the second evaporation mechanism; and the exhaust assembly can exhaust the condensed steam in the cavity assembly. The embedded steam cooking electric appliance has the following advantages that 1, the uniformity of a global temperature field is realized; the cooking quality and the food taste are remarkably improved, and food is prevented from being too wet; and thirdly, the convenience of cleaning and maintenance is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to an embedded steam cooking appliance. BACKGROUND

[0002] With the continuous improvement of people's pursuit of gourmet, cooking appliances have become an important household appliance product for improving life quality, showing personal taste and pursuing a healthy life.

[0003] Among them, the steam cooking appliance is an appliance that relies on an evaporator to heat water to generate steam cooking function; such as steam oven, steamer and the like; relies on a steam generator to heat water to generate steam to cook food.

[0004] Under the premise of fixed volume of the whole machine steam oven, in order to improve the uniformity of steam in cooking food inside the steam oven, it is necessary to reduce the problem of excessive cold air and condensed water inside the steam oven; the existing technology cannot simultaneously handle the problems of water accumulation at the bottom of the cavity and excessive moisture of food.

[0005] The patent with application number CN202421453013.X in the prior art discloses a cooking appliance, which comprises: a box body; an evaporation mechanism; a temperature detection mechanism; the evaporation mechanism is arranged at the bottom of the inner container and is in communication connection with the temperature detection mechanism; two evaporators and a water inlet assembly are arranged in the evaporation mechanism, and at least one evaporation disc is arranged in each evaporator; the total power of the first evaporator is greater than that of the second evaporator. Although the patent improves the temperature control capability of the cooking appliance to a certain extent, both evaporation discs are located in the recessed part at the bottom of the inner container, on the one hand, the uniformity of steam in cooking food inside the steam oven is poor, steam is generated only from the bottom and naturally rises, which easily leads to temperature difference between upper and lower cavities and the problem of "upper well-done and lower well-done"; on the other hand, the two evaporation discs located in the recessed part at the bottom of the inner container are prone to store scale and food residues, which is difficult to clean and maintain; in addition, the fan discharges air inside, which cannot discharge condensed steam, and the excessive cold air and condensed water in the cavity will cause the problem of excessive moisture of food; the design of the air path interferes with the natural convection of steam, the second fan is located directly above the two evaporation discs and blows air downward to form "steam internal circulation", which may hinder the natural upward of steam and affect the uniformity of steam distribution; it also causes the problem of intensified condensation in the cavity and more water accumulation at the bottom of the cavity; finally, the fan adopts the combination of "a pair of lateral first fans and one top second fan", the fan layout is complex, the space occupation is large, and the energy consumption is high.

[0006] In view of this, the present application is proposed. SUMMARY

[0007] The purpose of this invention is to propose an embedded steam cooking appliance to solve the problems of existing technologies where both evaporation plates are located in the recessed area at the bottom of the inner liner. On the one hand, this results in poor uniformity of steam cooking inside the steamer, as steam is generated only from the bottom and rises naturally, easily leading to temperature differences between the top and bottom of the cavity, causing the top to be raw and the bottom cooked. On the other hand, the two evaporation plates located in the recessed area at the bottom of the inner liner are prone to accumulating scale and food residue, making cleaning and maintenance difficult. In addition, the fans both exhaust air into the interior, failing to expel condensed steam, resulting in excessive cold air and condensate in the cavity, which can lead to excessive moisture in the food.

[0008] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0009] An embedded steam cooking appliance, the embedded steam cooking appliance comprising:

[0010] A cavity assembly, the interior of which forms a cooking cavity;

[0011] The first evaporation mechanism is located above the top of the cavity assembly and serves as the main steam source.

[0012] The second evaporation mechanism is located below the bottom of the cavity assembly. The second evaporation mechanism is an auxiliary steam source. When water accumulates at the bottom of the cavity assembly, the second evaporation mechanism starts to work. The second evaporation mechanism can perform a second heating and evaporation of the water accumulated at the bottom of the cavity assembly.

[0013] An exhaust assembly that can discharge condensed vapor from the cavity assembly.

[0014] Furthermore, a top heat insulation plate is provided above the cavity assembly, and the first evaporation mechanism is installed above the top heat insulation plate.

[0015] Furthermore, the first evaporation mechanism includes a water tank assembly, a water pump assembly, and a top evaporator. The water pump assembly can inject water from the water tank assembly into the top evaporator for heating and generating steam. A first water pumping pipe is provided between the water tank assembly and the water pump assembly, and the water tank assembly and the water pump assembly are connected through the first water pumping pipe. A second water pumping pipe is provided between the water pump assembly and the top evaporator, and the water pump assembly and the top evaporator are connected through the second water pumping pipe.

[0016] Furthermore, an air inlet pipe is provided between the top evaporator and the cavity assembly. The top evaporator is connected to the cavity assembly through the air inlet pipe. An air inlet is provided on the first side plate of the cavity assembly, and the air inlet pipe is installed on the air inlet.

[0017] Furthermore, an exhaust pipe is provided between the cavity assembly and the exhaust assembly, the cavity assembly is connected to the exhaust assembly through the exhaust pipe, an exhaust port is provided on the second side plate of the cavity assembly, the second side plate is disposed opposite to the first side plate, and the exhaust pipe is installed on the exhaust port.

[0018] Furthermore, the air intake is located near the front end of the first side plate, and the exhaust port is located near the rear end of the second side plate.

[0019] Furthermore, the second evaporation mechanism includes a bottom evaporator.

[0020] Furthermore, a first fixing plate and a second fixing plate are installed below the bottom of the cavity assembly. The first fixing plate and the second fixing plate are arranged opposite to each other, and the bottom evaporator is fixed below the bottom of the cavity assembly by the first fixing plate and the second fixing plate.

[0021] Furthermore, the exhaust assembly is installed on the top heat insulation plate, the water pump assembly is disposed between the water tank assembly and the top evaporator, and the exhaust assembly is disposed between the water tank assembly and the water pump assembly.

[0022] Furthermore, a control circuit board assembly is installed on the top heat insulation plate.

[0023] The present invention proposes an embedded steam cooking appliance, which, compared with the prior art, has the following beneficial effects:

[0024] 1) The embedded steam cooking appliance of this invention features a "three-dimensional steam circulation system" composed of dual evaporation mechanisms, which achieves superior dynamic steam distribution and temperature uniformity. On one hand, the first evaporation mechanism above the cavity assembly acts as the main steam source, generating steam that evenly heats the food. On the other hand, when the first evaporation mechanism above the cavity assembly heats to a certain level and water accumulates at the bottom of the cavity assembly, the second evaporation mechanism begins operation. This not only reheats and evaporates the water at the bottom of the cavity, preventing further water accumulation and lowering the temperature, but also ensures that no water accumulates at the bottom of the cavity. In addition to the temperature of the cooking chamber, auxiliary steam can also be generated. The steam generated by the second evaporation mechanism below the cavity assembly rises naturally and continuously heats the lower surface of the food and the bottom space of the cooking cavity, preventing the bottom temperature from being too low. The steam generated by the first evaporation mechanism above and the steam generated by the second evaporation mechanism below converge and collide in the middle of the cooking cavity, forming a strong, three-dimensional thermal steam turbulence. This greatly breaks the temperature stratification phenomenon, eliminates temperature dead zones, and makes the temperature at any point in the cooking cavity very close, achieving a truly uniform temperature field throughout the entire area. Whether it is the upper, middle, or lower layer of food, it can achieve almost synchronous cooking.

[0025] 2) The embedded steam cooking appliance described in this invention significantly improves cooking quality and taste, and the improvement in temperature field uniformity directly brings about a leap in cooking effect; the second evaporation mechanism of this solution can eliminate water accumulation at the bottom in time, and combined with the exhaust component, it can discharge excess condensed steam, effectively controlling the humidity level in the cavity and avoiding food from being too wet or soaked in water: it can not only ensure that the food surface is dry and not too wet, but also ensure the freshness of the food.

[0026] 3) The embedded steam cooking appliance described in this invention fundamentally improves the convenience of cleaning and maintenance: Firstly, the optimized positions of the two evaporation mechanisms prevent the accumulation of dirt. This design places the first evaporation mechanism at the top, completely avoiding spilled soup and grease, thus reducing its own contamination and significantly decreasing cleaning frequency and difficulty. The second evaporation mechanism is located at the bottom, but its primary function is to evaporate accumulated water, not to perform long-term soaking. Because the water evaporates promptly, dirt is less likely to solidify, reducing the adhesion of scale and residue. Secondly, this application, through the second evaporation mechanism and the exhaust assembly, greatly reduces the amount of static water at the bottom of the cavity, reducing scale formation at its source. These two aspects work together to not only reduce the burden on users of wiping the inner pot after each use but also reduce scale formation at its source, lowering the frequency and difficulty of equipment maintenance. Attached Figure Description

[0027] Figure 1 This is one of the three-dimensional structural schematic diagrams of an embedded steam cooking appliance according to an embodiment of the present invention;

[0028] Figure 2 For along Figure 1 A schematic diagram of the cross-sectional structure of the mid-section line AA;

[0029] Figure 3 for Figure 2 Enlarged 3D structural diagram at point A;

[0030] Figure 4 This is a second three-dimensional structural schematic diagram of an embedded steam cooking appliance according to an embodiment of the present invention;

[0031] Figure 5 This is one of the exploded structural diagrams of an embedded steam cooking appliance according to an embodiment of the present invention;

[0032] Figure 6 This is the third three-dimensional structural schematic diagram of an embedded steam cooking appliance according to an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the left side of an embedded steam cooking appliance according to an embodiment of the present invention;

[0034] Figure 8 This is a right-side structural schematic diagram of an embedded steam cooking appliance according to an embodiment of the present invention;

[0035] Figure 9 This is an exploded structural diagram of the exhaust assembly of an embedded steam cooking appliance according to an embodiment of the present invention;

[0036] Figure 10 This is an exploded structural diagram of an embedded steam cooking appliance according to an embodiment of the present invention;

[0037] Figure 11 This is a second exploded structural diagram of an embedded steam cooking appliance according to an embodiment of the present invention;

[0038] Figure 12 This is the third exploded structural diagram of an embedded steam cooking appliance according to an embodiment of the present invention.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Water tank assembly; 101. Water tank body assembly; 102. Water tank base assembly; 2. Exhaust assembly; 201. Fixing bracket; 2011. Clearance space; 202. Air guide hood; 203. Exhaust motor; 204. Exhaust fan wheel; 205. Air guide hood cover; 2051. Positioning rib; 206. Exhaust channel; 2061. Circular channel; 2062. Fan-shaped channel; 207. Triangular guide plate; 208. Diverter rib; 3. Water pump assembly; 4. Top evaporator; 5. Top insulation 6. Control circuit board assembly; 7. Cavity assembly; 701. Air inlet; 702. Exhaust outlet; 703. First side plate; 704. Second side plate; 8. Door assembly; 9. Bottom evaporator; 10. First fixing plate; 11. Second fixing plate; 12. First water suction pipe; 13. Second water suction pipe; 14. Air inlet pipe; 15. First water return pipe; 16. Second water return pipe; 17. Exhaust pipe; 18. Base plate; 19. Heating assembly; 191. Heating element; 192. Heating plate. Detailed Implementation

[0041] To make the technical means and objectives and effects of the present invention easier to understand, the embodiments of the present invention will be described in detail below with reference to specific illustrations.

[0042] It should be noted that all directional and positional terms used in this invention, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0043] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] 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 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.

[0045] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] Example 1

[0047] In existing technology, both evaporation trays are located in the recessed area at the bottom of the inner liner. On the one hand, the steam cooks food unevenly inside the steamer, as the steam is generated only from the bottom and rises naturally, which can easily lead to temperature differences between the top and bottom of the cavity, resulting in the problem of "raw on top and cooked on the bottom". On the other hand, the two evaporation trays located in the recessed area at the bottom of the inner liner are prone to accumulating scale and food residue, making cleaning and maintenance difficult. In addition, the fans all blow air into the interior, which cannot expel the condensed steam. Excessive cold air and condensate in the cavity can lead to excessive moisture in the food.

[0048] To address the aforementioned technical problems, in this embodiment, the applicant proposes an embedded steam cooking appliance, such as... Figures 1-10 As shown, the built-in steam cooking appliance includes:

[0049] Cavity assembly 7, the interior of which forms a cooking cavity;

[0050] The first evaporation mechanism is located on the top of the cavity assembly 7. The first evaporation mechanism is the main steam source. The steam generated by the first evaporation mechanism can enter the cavity assembly 7 to heat the food evenly.

[0051] The second evaporation mechanism is located below the bottom of the cavity assembly 7. The second evaporation mechanism is an auxiliary steam source. When the first evaporation mechanism above the cavity assembly 7 is heated to a certain degree and water accumulates at the bottom of the cavity assembly 7, the second evaporation mechanism starts to work and heats and evaporates the water in the cavity a second time. The second evaporation mechanism can heat and evaporate the water at the bottom of the cavity assembly 7 a second time, reducing the problem of water accumulation at the bottom of the cavity assembly 7.

[0052] The exhaust assembly 2 is capable of venting the condensed vapor inside the cavity assembly 7.

[0053] The embedded steam cooking appliance described in this embodiment has a first evaporation mechanism, a second evaporation mechanism, and an exhaust assembly 2 that are interconnected and work synergistically, offering the following advantages:

[0054] 1. The embedded steam cooking appliance described in this embodiment features a "three-dimensional steam circulation system" composed of dual evaporation mechanisms, which achieves superior dynamic steam distribution and temperature uniformity. On one hand, the first evaporation mechanism above the cavity assembly 7 acts as the main steam source, generating steam that evenly heats the food. On the other hand, when the first evaporation mechanism above the cavity assembly 7 heats to a certain level and water accumulates at the bottom of the cavity assembly 7, the second evaporation mechanism begins to operate. This not only reheats and evaporates the water at the bottom of the cavity, preventing further water accumulation and reducing the temperature. The bottom temperature can also generate auxiliary steam. The steam generated by the second evaporation mechanism below the cavity component 7 rises naturally and continuously heats the lower surface of the food and the bottom space of the cooking cavity, preventing the bottom temperature from being too low. The steam generated by the first evaporation mechanism above and the steam generated by the second evaporation mechanism below converge and collide in the middle of the cooking cavity, forming a strong, three-dimensional thermal steam turbulence. This greatly breaks the temperature stratification phenomenon, eliminates temperature dead zones, and makes the temperature at any point in the cooking cavity very close, achieving a truly uniform temperature field across the entire area. Whether it is the upper, middle, or lower layer of food, it can achieve almost synchronous cooking.

[0055] 2. The embedded steam cooking appliance described in this embodiment significantly improves cooking quality and taste. The improvement in temperature uniformity directly leads to a leap in cooking effect. The second evaporation mechanism of this solution can eliminate water accumulation at the bottom in time, and combined with the exhaust component 2, it can discharge excess condensed steam, effectively controlling the humidity level in the cavity and avoiding food from being too wet or soaked in water. This not only ensures that the food surface is dry and not too wet, but also ensures the freshness of the food.

[0056] 3. The embedded steam cooking appliance described in this embodiment fundamentally improves the convenience of cleaning and maintenance: Firstly, the optimized positions of the two evaporation mechanisms prevent the accumulation of dirt; this design places the first evaporation mechanism at the top, completely avoiding dripping soup and grease, making it less susceptible to contamination and greatly reducing cleaning frequency and difficulty; the second evaporation mechanism is located at the bottom, but its main function is to evaporate accumulated water, rather than long-term soaking. Because the accumulated water is evaporated in time, dirt is less likely to accumulate and solidify, reducing the adhesion of scale and residue. Secondly, this application, through the second evaporation mechanism and the exhaust assembly 2, greatly reduces the amount of static water accumulated at the bottom of the cavity, reducing scale formation at the source. These two aspects work together to not only reduce the burden on users to wipe the inner pot dry after each use, but also reduce scale formation at the source, lowering the maintenance frequency and difficulty of the equipment.

[0057] 4. In the embedded steam cooking appliance described in this embodiment, the second evaporation mechanism reheats and utilizes the already generated condensate, instead of continuously consuming new water and energy, making the embedded steam cooking appliance more energy-efficient.

[0058] 5. In the embedded steam cooking appliance described in this embodiment, when water accumulates at the bottom of the cavity assembly 7, the second evaporation mechanism starts to work, which not only makes the product more intelligent, but also avoids the second evaporation mechanism from dry burning, ensuring the efficiency and stability of the entire cooking process.

[0059] A water accumulation detection device is provided at the bottom of the cavity assembly 7. Since the specific structure and assembly relationship of its related components are existing technologies, they will not be described in detail here.

[0060] Specifically, a top heat insulation plate 5 is provided above the cavity assembly 7, and the first evaporation mechanism is installed above the top heat insulation plate 5.

[0061] This design, on the one hand, concentrates heat energy and improves efficiency: the top heat insulation plate 5 effectively prevents the heat generated by the evaporator from dissipating upwards into the electrical components at the top of the machine, forcing the heat energy downwards and concentrating it into the cooking cavity, thus improving thermal efficiency. On the other hand, it protects the upper components: it avoids the effects of high temperatures on the water tank assembly 1, water pump assembly 3, and top evaporator 4 installed above, thus improving the overall reliability of the machine.

[0062] Specifically, the first evaporation mechanism includes a water tank assembly 1, a water pump assembly 3, and a top evaporator 4. The water pump assembly 3 can inject water from the water tank assembly 1 into the top evaporator 4 to heat and generate steam. A first water pumping pipe 12 is provided between the water tank assembly 1 and the water pump assembly 3, and the water tank assembly 1 and the water pump assembly 3 are connected through the first water pumping pipe 12. A second water pumping pipe 13 is provided between the water pump assembly 3 and the top evaporator 4, and the water pump assembly 3 and the top evaporator 4 are connected through the second water pumping pipe 13.

[0063] Furthermore, the power of the top evaporator 4 is 1200~2000W.

[0064] Specifically, in this embodiment, the power of the top evaporator 4 is 1500W.

[0065] The system employs an independent water supply and heating path consisting of water tank assembly 1, water pump assembly 3, and top evaporator 4. On one hand, water pump assembly 3 can precisely control the amount of water injected into top evaporator 4, thereby achieving precise adjustment and on-demand generation of steam and avoiding energy waste. On the other hand, the independent water path and evaporator design ensure that water is instantly heated into steam before entering the chamber, resulting in drier and higher-quality steam.

[0066] Specifically, an air inlet pipe 14 is provided between the top evaporator 4 and the cavity assembly 7. The top evaporator 4 is connected to the cavity assembly 7 through the air inlet pipe 14. An air inlet 701 is provided on the first side plate 703 of the cavity assembly 7, and the air inlet pipe 14 is installed on the air inlet 701.

[0067] Specifically, an exhaust pipe 17 is provided between the cavity assembly 7 and the exhaust assembly 2. The cavity assembly 7 is connected to the exhaust assembly 2 through the exhaust pipe 17. An exhaust port 702 is provided on the second side plate 704 of the cavity assembly 7. The second side plate 704 is disposed opposite to the first side plate 703. The exhaust pipe 17 is installed on the exhaust port 702.

[0068] Specifically, the air inlet 701 is located on the first side plate 703 near the front end, and the exhaust outlet 702 is located on the second side plate 704 near the rear end.

[0069] This design cleverly constructs a diagonal steam flow field that runs through the entire cooking cavity. Steam enters from the front of one side of the cooking cavity, fully covering the food as it flows, and is finally discharged from the rear of the opposite side. This design, on the one hand, forces the steam to travel the longest path before being discharged, greatly reducing circulation blind spots, improving the uniformity of steam distribution, and preventing uneven heating of food in corners; on the other hand, fresh, high-temperature steam is continuously injected from the front, while low-temperature, condensate-rich, and humid air is forcibly discharged from the rear, achieving efficient air replacement within the cavity and ensuring the "vitality" of the steam and heating efficiency.

[0070] Specifically, the second evaporation mechanism includes a bottom evaporator 9.

[0071] The power of the top evaporator 4 is greater than that of the bottom evaporator 9.

[0072] Furthermore, the power of the bottom evaporator 9 is 150~300W, without specific limitation.

[0073] In this embodiment, the power of the bottom evaporator 9 is 200W.

[0074] Furthermore, the bottom evaporator 9 is a heating plate or heating wire assembly, without specific limitation.

[0075] In this embodiment, the bottom evaporator 9 is a heating plate.

[0076] Specifically, a first fixing plate 10 and a second fixing plate 11 are installed below the bottom of the cavity assembly 7. The first fixing plate 10 and the second fixing plate 11 are arranged opposite to each other, and the bottom evaporator 9 is fixed below the bottom of the cavity assembly 7 by the first fixing plate 10 and the second fixing plate 11.

[0077] This mechanical fixing method is very sturdy and can withstand the impact of thermal expansion and contraction, ensuring that the heating plate fits tightly against the bottom of the cavity during long-term use, maintaining stable heat conduction efficiency, while avoiding vibration and abnormal noise, thus improving the product's durability.

[0078] More specifically, the first fixing plate 10 is fixed to the rear side below the bottom of the cavity assembly 7 via the third connector; the second fixing plate 11 is fixed to the front side below the bottom of the cavity assembly 7 via the third connector.

[0079] Specifically, the exhaust assembly 2 is installed on the top heat insulation plate 5, the water pump assembly 3 is located between the water tank assembly 1 and the top evaporator 4, and the exhaust assembly 2 is located between the water tank assembly 1 and the water pump assembly 3.

[0080] This design, on the one hand, makes the structure compact, integrating all core functional modules such as the water tank assembly 1, exhaust assembly 2, and top evaporator 4 into the same area above the cavity assembly 7, achieving maximum space utilization, which is crucial for compact embedded electrical appliances. On the other hand, this layout allows the paths of the first water suction pipe 12, the second water suction pipe 13, the air intake pipe 14, and the exhaust pipe 17 to be designed to be the shortest and most regular, reducing energy loss and potential points of failure.

[0081] Specifically, a control circuit board assembly 6 is installed on the top heat insulation plate 5.

[0082] This design makes the structure more compact, integrating all core functional modules such as the water tank assembly 1, the exhaust assembly 2, the top evaporator 4, and the control circuit board assembly 6 into the same area above the cavity assembly 7, achieving the ultimate utilization of space, which is crucial for compact embedded electrical appliances.

[0083] More specifically, the water tank assembly 1 includes a water tank body assembly 101 and a water tank base assembly 102, wherein the water tank body assembly 101 is removably installed inside the water tank base assembly 102.

[0084] The water tank assembly 101 and the water tank base assembly 102 provide double protection for the internal water to prevent leakage. The water tank assembly 101 itself is a complete, sealed container with its own lid and sealing ring. This ensures that water will not splash or leak from the inside of the container even during movement and handling. The water tank base assembly 102 is not just a "drawer," but also a "safety tray" or "secondary enclosure structure" that can further prevent water leakage.

[0085] When users need to add water, they can simply pull out the water tank assembly 101, add water directly to the water tank assembly 101, and push it back into the water tank base assembly 102 after it is full, which is very convenient.

[0086] More specifically, such as Figure 9 As shown, the exhaust assembly 2 includes an air guide hood 202, an exhaust motor 203, an exhaust impeller 204, and an air guide cover 205. The air guide cover 205 covers the upper part of the air guide hood 202, and the air guide cover 205 and the air guide hood 202 form an exhaust channel 206. The exhaust impeller 204 is installed above the exhaust motor 203, and the exhaust impeller 204 and the exhaust motor 203 form an exhaust fan. The exhaust fan is installed in the exhaust channel 206 near the rear end.

[0087] On the one hand, it achieves efficient exhaust, which allows the exhaust pipe 17 leading out from the cooking cavity to be connected to the inlet of the exhaust channel 206 in the shortest and most direct path. The shorter the pipe and the fewer the bends, the smaller the airflow resistance, and the exhaust motor 203 can achieve more efficient exhaust with lower power consumption and less noise. On the other hand, it avoids pressure loss and condensate accumulation caused by long pipes and sharp bends, ensuring that condensed steam can be discharged quickly and thoroughly.

[0088] More specifically, such as Figure 9 As shown, the exhaust channel 206 is configured as a circular channel 2061 near the rear end, and as a fan-shaped channel 2062 near the front end. The width of the inlet of the fan-shaped channel 2062 is d1, and the width of the outlet of the fan-shaped channel 2062 is d2, where d2 / d1 = 5~6.

[0089] The circular channel 2061 facilitates the installation of the exhaust fan, while the fan-shaped channel 2062, with its outlet width being 5 to 6 times the inlet width, effectively disperses and slows down the high-speed, concentrated airflow. On the one hand, this greatly reduces exhaust noise and avoids the "whistling" caused by the high-speed airflow; on the other hand, the slowed airflow helps to more fully separate the condensed water vapor carried within, preventing the water vapor from being forcefully ejected.

[0090] More specifically, such as Figure 9As shown, more specifically, a triangular guide plate 207 is provided at the outlet of the fan-shaped channel 2062.

[0091] On the one hand, it achieves uniform, stable, and interference-free exhaust; the triangular guide plate 207 divides the main airflow into two and guides it to diffuse to both sides, avoiding direct impact of a single concentrated airflow on the machine's interior or other components, thus making the airflow distribution uniform and stable; on the other hand, it prevents backflow. This multi-path, decentralized exhaust method effectively prevents the exhausted hot and humid gas from forming vortices in the limited space at the top of the machine and from being partially re-inhaled, ensuring the one-time and thorough exhaust.

[0092] More specifically, such as Figure 9 As shown, multiple flow dividers 208 are provided at the outlet of the fan-shaped channel 2062, and the air guide cover 205 is provided. The air guide cover 202 and the multiple flow dividers 208 form multiple exhaust windows.

[0093] On the one hand, it achieves uniform, stable, and undisturbed exhaust; multiple flow dividers 208 divide the wide fan-shaped outlet into multiple small exhaust windows, making the airflow distribution more uniform and stable. On the other hand, it prevents backflow. This multi-path, decentralized exhaust method effectively prevents the exhausted hot and humid gas from forming vortices in the limited space at the top of the machine and from being partially re-inhaled, ensuring the one-time and thorough exhaust.

[0094] More specifically, such as Figure 9 As shown, multiple diversion ribs 208 are symmetrically arranged on both sides of the triangular guide plate 207.

[0095] This setup has the following advantages:

[0096] 1. It can ensure that the airflow is evenly divided into multiple small streams and that the exhaust flow and velocity on the left and right sides are almost equal, avoiding the internal pressure imbalance of the system caused by uneven exhaust on both sides, and the possible additional vibration or noise, thus ensuring a stable and efficient exhaust process.

[0097] 2. To maximize exhaust noise reduction, the symmetrical structure ensures that the separation and merging of airflow as it passes through the splitter 208 are predictable and regular. This regular flow effectively disperses strong airflow noise of a single frequency across a wider frequency range and reduces its peak value. The exhaust sound is smoother and deeper, significantly reducing unpleasant hissing or whistling sounds and improving the user experience.

[0098] 3. Symmetrical structures exhibit uniform stress distribution under load, enhancing structural stability and reliability.

[0099] 4. Symmetrical design simplifies mold design and production process, and reduces costs.

[0100] The air guide cover 205 is detachably connected to the air guide body 202.

[0101] This setup facilitates the installation and removal of the air duct cover 205 and the air duct body 202. The detachable design allows users or service personnel to easily open and thoroughly clean the entire exhaust channel 206, preventing accumulated dirt from breeding bacteria, producing odors, or clogging the air duct.

[0102] More specifically, such as Figure 9 As shown, the exhaust assembly 2 also includes a fixing frame 201, which raises the overall height of the exhaust assembly 2. A clearance space 2011 is provided below the fixing frame 201, which allows the exhaust pipe 17 to be smoothly and without sharp bends. At the same time, the clearance space 2011 allows other pipelines such as the first water pipe 12 to pass safely underneath it. On the one hand, it protects the water pipe and the air pipe from being crushed or broken; on the other hand, it achieves a neat layout of the internal pipelines of the module, reduces mechanical interference and vibration wear, and improves long-term reliability.

[0103] More specifically, such as Figure 9 As shown, a positioning rib 2051 is provided on the air guide cover 205.

[0104] This feature not only serves as a positioning element during installation, improving installation efficiency, but also strengthens the structural strength of the air duct cover 205.

[0105] The embedded steam cooking appliance described in this embodiment uses a control circuit board assembly 6 to inject water into the top evaporator 4 via a water pump assembly 3, a first water intake pipe 12, and a second water intake pipe 13. This water is then heated to generate steam, which is blown into the cooking cavity from the left front side through an air intake pipe 14 to evenly heat the food. The steam outlet is located at the upper rear right side, where the condensed steam is discharged through an exhaust pipe 17 from the upper exhaust assembly 2, thus ensuring the freshness of the food and preventing it from becoming too wet; it also ensures that no water accumulates at the bottom of the cavity.

[0106] More specifically, such as Figure 1 As shown, a first return water pipe 15 is provided between the water tank assembly 1 and the water pump assembly 3, and the water tank assembly 1 and the water pump assembly 3 are connected through the first return water pipe 15. A second return water pipe 16 is provided between the water pump assembly 3 and the top evaporator 4, and the water pump assembly 3 and the top evaporator 4 are connected through the second return water pipe 16.

[0107] The installation of the first return water pipe 15 and the second return water pipe 16 is a crucial safety and reliability design. Their main function is to prevent scale buildup and dry burning, and to enable the system to self-drain. Specific advantages are as follows:

[0108] 1. It absolutely prevents scaling and dry burning of the top evaporator 4 due to residual water, protecting the core heating element.

[0109] 2. Significantly extended the service life of the top evaporator 4 and water pump assembly 3, reducing the failure rate and maintenance costs.

[0110] 3. Automatic system draining is implemented, which facilitates user maintenance and improves long-term stability.

[0111] More specifically, such as Figure 5 As shown, the embedded steam cooking appliance also includes a door assembly 8, which is mounted on the front side of the cavity assembly 7.

[0112] More specifically, such as Figure 5 As shown, the embedded steam cooking appliance also includes a base plate 18.

[0113] The built-in steam cooking appliance includes not only the structure described above, but also other related components such as the outer casing. Since the specific structure and assembly relationship of these components are existing technologies, they will not be described in detail here.

[0114] Example 2

[0115] In this embodiment, unlike in embodiment 1, as follows: Figure 11 As shown, the top evaporator 4 is a direct-injection evaporator.

[0116] Direct injection evaporators offer superior overall performance, providing faster preheating, more precise steam control, more uniform heating, less water accumulation, and a more convenient cleaning experience.

[0117] The exhaust assembly 2 is located at the front end of the water pump assembly 3.

[0118] Example 3

[0119] In this embodiment, unlike in embodiment 1, as follows: Figure 12 As shown, the embedded steam cooking appliance includes a heating element 19, which can heat the top plate of the cavity assembly 7.

[0120] The core function of the heating element 19 is to heat the top plate and prevent internal condensation. When steam is generated, the heating element 19 on the outer surface of the top plate of the cavity assembly 7 is simultaneously heated, maintaining its temperature at a high level and preventing the formation of cold air. This significantly reduces the generation of condensate at the top, thus perfectly avoiding the problem of "water droplets ruining food" and ensuring the integrity and appearance of the finished dish. Furthermore, it further improves temperature uniformity and energy efficiency, and also enhances the hygiene and reliability of the equipment.

[0121] A steam detection device is installed inside the cavity assembly 7. Since the specific structure and assembly relationship of its related components are existing technologies, they will not be described in detail here.

[0122] Specifically, the heating element 19 is disposed between the cavity assembly 7 and the top heat insulation plate 5.

[0123] Placing it between the top plate and the insulation plate creates an active "thermal interlayer" outside the top plate of the cavity assembly 7. This thermal interlayer effectively maintains the stability of the top plate temperature, ensuring it remains above the dew point temperature of the vapor inside the cavity, thus physically suppressing condensation formation to the greatest extent possible. The top insulation plate 5 prevents heat loss upwards, forcing heat to be directed entirely to the top plate. The heat is forcibly directed and used to heat the top plate, without wasting any space above. This achieves "precise heating," achieving optimal anti-condensation with minimal power consumption and improving overall energy efficiency. Furthermore, it efficiently utilizes the inherent, unused gap between the top of the cavity and the insulation plate, making the overall structure more compact without adding extra volume, perfectly meeting the stringent requirements of built-in appliances where internal space is extremely limited.

[0124] Specifically, the heating element 19 is mounted on the outer surface of the top plate of the cavity assembly 7.

[0125] More specifically, in this embodiment, the heating element 19 is bonded to the outer surface of the top plate of the cavity assembly 7.

[0126] In this embodiment, the heating assembly 19 comprises a heating element 191 and a heating plate 192. The heating element 191 is mounted on the heating plate 192, and the heating plate 192 is bonded to the outer surface of the top plate of the cavity assembly 7. The heating assembly 19 has a very compact structure, does not occupy extra space, and is easy to manufacture and assemble. On the other hand, it has high heat conduction efficiency. The heating plate 192 is usually a metal plate and can serve as a heat spreader. The heating plate 192 quickly and evenly conducts the heat generated by the heating wire 191 to the entire top plate, avoiding local overheating and achieving large-area uniform heat preservation.

[0127] Furthermore, the heating element 191 can be configured as a heating tube or a heating wire, and there is no specific limitation.

[0128] In this embodiment, the heating element 191 is a heating wire.

[0129] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An embedded steam cooking appliance, characterized in that, The embedded steam cooking appliance includes: A cavity assembly (7) is provided, the interior of which forms a cooking cavity; The first evaporation mechanism is located above the top of the cavity assembly (7) and serves as the main steam source. The second evaporation mechanism is located below the bottom of the cavity assembly (7). The second evaporation mechanism is an auxiliary steam source. When water accumulates at the bottom of the cavity assembly (7), the second evaporation mechanism starts to work. The second evaporation mechanism can heat and evaporate the water at the bottom of the cavity assembly (7) for the second time. The exhaust assembly (2) is capable of venting the condensed vapor inside the cavity assembly (7).

2. The built-in steam cooking appliance according to claim 1, characterized in that, A top heat insulation plate (5) is provided above the cavity assembly (7), and the first evaporation mechanism is installed above the top heat insulation plate (5).

3. An embedded steam cooking appliance according to claim 1 or 2, characterized in that, The first evaporation mechanism includes a water tank assembly (1), a water pump assembly (3), and a top evaporator (4). The water pump assembly (3) can inject water from the water tank assembly (1) into the top evaporator (4) to heat and generate steam. A first water pumping pipe (12) is provided between the water tank assembly (1) and the water pump assembly (3), and the water tank assembly (1) and the water pump assembly (3) are connected through the first water pumping pipe (12). A second water pumping pipe (13) is provided between the water pump assembly (3) and the top evaporator (4), and the water pump assembly (3) and the top evaporator (4) are connected through the second water pumping pipe (13).

4. The built-in steam cooking appliance according to claim 3, characterized in that, An air inlet pipe (14) is provided between the top evaporator (4) and the cavity assembly (7). The top evaporator (4) is connected to the cavity assembly (7) through the air inlet pipe (14). An air inlet (701) is provided on the first side plate (703) of the cavity assembly (7). The air inlet pipe (14) is installed on the air inlet (701).

5. An embedded steam cooking appliance according to claim 4, characterized in that, An exhaust pipe (17) is provided between the cavity assembly (7) and the exhaust assembly (2). The cavity assembly (7) is connected to the exhaust assembly (2) through the exhaust pipe (17). An exhaust port (702) is provided on the second side plate (704) of the cavity assembly (7). The second side plate (704) is disposed opposite to the first side plate (703). The exhaust pipe (17) is installed on the exhaust port (702).

6. The embedded steam cooking appliance according to claim 5, characterized in that, The air inlet (701) is located on the first side plate (703) near the front end, and the exhaust port (702) is located on the second side plate (704) near the rear end.

7. The built-in steam cooking appliance according to claim 1, characterized in that, The second evaporation mechanism includes a bottom evaporator (9).

8. An embedded steam cooking appliance according to claim 7, characterized in that, A first fixing plate (10) and a second fixing plate (11) are installed below the bottom of the cavity assembly (7). The first fixing plate (10) and the second fixing plate (11) are arranged opposite to each other. The bottom evaporator (9) is fixed below the bottom of the cavity assembly (7) by the first fixing plate (10) and the second fixing plate (11).

9. An embedded steam cooking appliance according to claim 3, characterized in that, The exhaust assembly (2) is installed on the top heat insulation plate (5), the water pump assembly (3) is located between the water tank assembly (1) and the top evaporator (4), and the exhaust assembly (2) is located between the water tank assembly (1) and the water pump assembly (3).

10. An embedded steam cooking appliance according to claim 2, characterized in that, A control circuit board assembly (6) is installed on the top heat insulation plate (5).

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