Steam oven
By using a hot air blower to create a negative pressure chamber and a sealed structure in the steam oven, the problem of quickly expelling water vapor in the steam oven is solved, achieving a cost-effective and uniform heating effect for food.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO FOTILE KITCHEN WARE CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-07-24
AI Technical Summary
Existing steam ovens typically require an additional blower device to quickly remove excess steam from the inner cavity during the steaming process, which increases costs.
Design a steam oven that utilizes its own hot air blower to generate high-temperature steam in the steam generator, creating negative pressure through the negative pressure chamber and air inlet to quickly expel excess steam, and seals the gap between the cover plate and the rear wall with an elastic sealing ring, eliminating the need for an additional blower device.
It enables the rapid removal of excess water vapor from the inner pot, avoiding additional costs, while ensuring that food is heated evenly and protecting electronic components.
Smart Images
Figure CN224539945U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of steam oven technology, and in particular to steam ovens. Background Technology
[0002] For steam ovens, quickly removing excess steam from the inner cavity during the steaming process is one of the key factors in ensuring good cooking results. Some steam ovens are equipped with additional fan devices (such as blowers or fans) to quickly remove excess steam from the inner cavity; however, this significantly increases the cost of the steam oven. Utility Model Content
[0003] Therefore, it is necessary to provide a steam oven to address the above problems.
[0004] To address the above problems, this application provides the following technical solution:
[0005] A steam oven, the steam oven comprising:
[0006] Box;
[0007] The inner liner, located in the box body, has a cooking cavity and a rear wall, and the rear wall is provided with an air inlet;
[0008] A steam generator is connected to the cooking cavity;
[0009] A cover plate is fixedly installed on the rear wall and together with the rear wall, encloses the negative pressure cavity;
[0010] A hot air blower includes an output shaft and fan blades. The output shaft passes through the negative pressure chamber and the air inlet. The fan blades are located inside the cooking chamber and are positioned close to the air inlet. The air inlet is located directly behind the fan blades.
[0011] An intake pipe and an exhaust pipe are provided, wherein the intake pipe, the negative pressure chamber, the air inlet, the cooking chamber, and the exhaust pipe are sequentially connected, and both the intake pipe and the exhaust pipe are connected to the outside.
[0012] An elastic sealing ring is arranged around the negative pressure chamber; the cover plate presses the elastic sealing ring against the rear wall to seal the gap between the cover plate and the rear wall.
[0013] This steam oven has at least the following beneficial effects:
[0014] During the steaming process in this steam oven, the steam generator and hot air blower operate. The high-temperature steam generated by the steam generator enters the cooking cavity, and the hot air blower agitates the high-temperature steam within the cooking cavity, ensuring that the food is heated evenly. During operation, a negative pressure is created directly behind the hot air blower, making the air inlet and negative pressure chamber negative pressure areas. This accelerates the entry of outside air into the cooking cavity through the air inlet pipe, negative pressure chamber, and air inlet, thereby speeding up the expulsion of excess steam from the cooking cavity through the exhaust pipe. This achieves rapid removal of excess steam from the inner liner. The hot air blower is an inherent feature of the steam oven (when the steam oven is in steaming mode, the hot air blower agitates the high-temperature steam inside the cavity, ensuring even heating of the food; when the steam oven is in baking mode, the hot air blower agitates the hot air near the heating element, ensuring even distribution of heat generated by the heating element within the cooking cavity, thus ensuring even heating of the food. The heating element is existing technology and will not be described in detail here.). This steam oven utilizes its inherent hot air blower to quickly remove excess steam from the cavity without the need for an additional blower, achieving rapid removal of excess steam while avoiding a significant increase in the cost of the steam oven. The elastic sealing ring seals the gap between the cover and the rear wall, preventing steam and condensation from leaking through this gap and protecting the electronic components of the steam oven.
[0015] In one embodiment, the hot air blower further includes an impeller disk fixed to the output shaft; the fan blades include a plurality of main blades and a plurality of auxiliary blades, each of the main blades protruding from the front side of the impeller disk, and each of the auxiliary blades protruding from the rear side of the impeller disk.
[0016] This configuration ensures that the main blades can fully agitate the high-temperature steam in the cooking cavity, while the auxiliary blades ensure that a large negative pressure is generated in the air inlet and negative pressure chamber. This allows outside air to quickly enter the cooking cavity through the air inlet pipe, negative pressure chamber, and air inlet, thereby accelerating the discharge of excess steam from the inner liner through the exhaust pipe.
[0017] In one embodiment, the air inlet is a circular hole, the output shaft is coaxially arranged with the air inlet, and each of the auxiliary blades is evenly distributed around the circumference of the output shaft.
[0018] This design allows outside air to enter the cooking cavity stably, which helps ensure the cooking effect of the steam oven.
[0019] In one embodiment, each of the auxiliary blades is located outside the area directly in front of the air inlet.
[0020] This design helps to generate a larger negative pressure in the air intake and cooking cavity, which allows outside air to quickly enter the cooking cavity through the air intake pipe, negative pressure chamber, and air intake, thereby accelerating the speed at which excess water vapor in the inner pot is discharged through the exhaust pipe.
[0021] In one embodiment, the portion of the rear wall near the air inlet settles backward to form a recessed cavity, and the auxiliary fan blade portion is located within the recessed cavity.
[0022] This design expands the space near the auxiliary fan blades, allowing for a larger height of the auxiliary fan blades (i.e., the dimensions of the auxiliary fan blades in the front-to-back direction). This enables the auxiliary fan blades to generate greater negative pressure during the operation of the hot air blower, thereby increasing the negative pressure in the air intake and negative pressure chamber. This accelerates the entry of outside air into the cooking chamber through the air intake pipe, negative pressure chamber, and air intake, thus speeding up the discharge of excess water vapor from the inner liner through the exhaust pipe.
[0023] In one embodiment, the steam engine further includes a plurality of threaded connectors distributed around the elastic sealing ring, and the cover plate and the rear wall are fixedly connected by the plurality of threaded connectors.
[0024] With this setup, tightening the threaded connector will fix the cover plate and the rear wall together and press the elastic sealing ring against the rear wall; unscrewing the threaded connector will allow you to remove the cover plate and replace the elastic sealing ring.
[0025] In one embodiment, the cover plate has a mounting groove on the side facing the rear wall, the mounting groove conforming to the elastic sealing ring, the elastic sealing ring being partially located within the mounting groove and partially protruding from the mounting groove.
[0026] This design serves two purposes: firstly, the mounting groove limits the position of the elastic sealing ring, facilitating its installation; secondly, the elastic sealing ring protrudes from the mounting groove, so that during the tightening of the threaded connection, the elastic sealing ring is clamped and deformed by the cover plate and the rear wall, thereby sealing the gap between the cover plate and the rear wall.
[0027] In one embodiment, the cover plate includes a cavity portion and a mounting portion. The cavity portion and the rear wall together enclose a negative pressure cavity. The mounting portion surrounds the cavity portion and includes an inner ring, a middle ring, and an outer ring arranged sequentially from the inside to the outside. The mounting groove is disposed in the middle ring. The inner ring is fitted against the rear wall. The outer ring is spaced apart from the rear wall. Each of the threaded connectors is disposed in the outer ring.
[0028] This design allows the elastic sealing ring to be compressed during the tightening of each threaded connection, ensuring that the elastic sealing ring reliably seals the gap between the cover plate and the rear wall.
[0029] In one embodiment, the elastic sealing ring includes a base ring and a first ring, a second ring, and a third ring, all protruding from the same side of the base ring. The first ring, the second ring, and the third ring are all conformal to the base ring. The second ring is arranged around the first ring at intervals, and the third ring is arranged around the second ring at intervals.
[0030] With this configuration, the first, second, and third rings are easily deformed under pressure during the tightening of each threaded connection, which helps the elastic sealing ring reliably seal the gap between the cover plate and the rear wall.
[0031] In one embodiment, the first ring, the second ring, and the third ring all protrude from the side of the base ring away from the cover plate. The side of the base ring facing the cover plate is a plane, the bottom wall of the mounting groove is a plane, and the side of the base ring facing the cover plate is fitted to the bottom wall of the mounting groove.
[0032] This design makes it easy to install the elastic sealing ring into the mounting groove. Attached Figure Description
[0033] Figure 1 This is a perspective view of a steam oven according to one embodiment of this application;
[0034] Figure 2 for Figure 1 A three-dimensional schematic diagram of the steam oven shown from another perspective;
[0035] Figure 3 for Figure 1 A three-dimensional schematic diagram of the middle section structure;
[0036] Figure 4 for Figure 3 An exploded view of the structure shown;
[0037] Figure 5 for Figure 4 A schematic diagram showing a further decomposition of the structure shown.
[0038] Figure 6 for Figure 5 A three-dimensional schematic diagram of the structure shown from another perspective;
[0039] Figure 7 for Figure 5 A three-dimensional schematic diagram of the middle section structure;
[0040] Figure 8 for Figure 7 An exploded view of the structure shown;
[0041] Figure 9 for Figure 8A three-dimensional schematic diagram of the structure shown from another perspective.
[0042] Figure label:
[0043] 1. Housing; 2. Inner liner; 21. Cooking cavity; 22. Rear wall; 221. Air inlet; 222. Recessed cavity; 223. Second hole; 3. Steam generator; 4. Cover plate; 41. Cavity forming part; 42. Mounting part; 421. Inner ring; 422. Middle ring; 4221. Mounting groove; 423. Outer ring; 4231. First hole; 5. Negative pressure chamber; 6. Hot air blower; 61. Output shaft; 62. Fan blade; 621. Main blade; 622. Auxiliary blade; 63. Impeller; 7. Air inlet pipe; 8. Exhaust pipe; 9. Elastic sealing ring; 91. First ring; 92. Second ring; 93. Third ring; 94. Base ring. Detailed Implementation
[0044] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0045] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 application.
[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0048] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0049] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0050] See Figures 1 to 9This application provides a steam oven, which includes a body 1, an inner liner 2, a steam generator 3, a cover 4, a hot air blower 6, an air inlet pipe 7, an exhaust pipe 8, and an elastic sealing ring 9. The inner liner 2 is located within the body 1 and has a cooking cavity 21 and a rear wall 22. An air inlet 221 is provided on the rear wall 22. Specifically, the inner liner 2's walls enclose the cooking cavity 21, where food is placed and cooked. The rear wall 22 is the rearmost wall of the inner liner 2. The steam generator 3 communicates with the cooking cavity 21 and supplies high-temperature steam to the cooking cavity 21, allowing the steam oven to cook the food using this high-temperature steam. The cover 4 is fixedly installed on the rear wall 22 and, together with the rear wall 22, encloses a negative pressure cavity 5. The hot air blower 6 includes an output shaft 61 and a fan blade 62. The output shaft 61 passes through the negative pressure chamber 5 and the air inlet 221. The fan blade 62 is located inside the cooking chamber 21 and is positioned close to the air inlet 221, which is located directly behind the fan blade 62. The air inlet pipe 7, the negative pressure chamber 5, the air inlet 221, the cooking chamber 21, and the exhaust pipe 8 are sequentially connected, and both the air inlet pipe 7 and the exhaust pipe 8 are connected to the outside. An elastic sealing ring 9 is arranged around the negative pressure chamber 5, and the cover plate 4 presses the elastic sealing ring 9 against the rear wall 22 to seal the gap between the cover plate 4 and the rear wall 22.
[0051] During the steaming process in this steam oven, the steam generator 3 and the hot air blower 6 operate. The high-temperature steam generated by the steam generator 3 enters the cooking cavity 21, and the hot air blower 6 agitates the high-temperature steam in the cooking cavity 21, ensuring that the food in the cooking cavity 21 is heated evenly. During operation, the hot air blower 6 creates a negative pressure behind it, which makes the air inlet 221 and the negative pressure chamber 5 negative pressure areas. This accelerates the speed at which outside air enters the cooking cavity 21 through the air inlet pipe 7, the negative pressure chamber 5, and the air inlet 221, thereby accelerating the speed at which excess steam in the cooking cavity 21 is discharged from the inner liner 2 through the exhaust pipe 8. This achieves rapid discharge of excess steam from the inner liner 2. The hot air blower 6 is an inherent feature of the steam oven (when the steam oven is performing the steaming function, the hot air blower 6 agitates the high-temperature water vapor inside the inner cavity 2, thereby ensuring even heating of the food; when the steam oven is performing the baking function, the hot air blower 6 agitates the hot air near the heating element, ensuring that the heat generated by the heating element is evenly distributed within the cooking cavity 21, thus ensuring even heating of the food. The heating element is existing technology and will not be described in detail in this application.). This steam oven utilizes its inherent hot air blower 6 to quickly remove excess water vapor from the inner cavity 2 without the need for an additional blower device. This achieves rapid removal of excess water vapor from the inner cavity 2 while avoiding a significant increase in the cost of the steam oven. The elastic sealing ring 9 seals the gap between the cover plate 4 and the rear wall 22, preventing water vapor and condensate from leaking through this gap and protecting the electronic components of the steam oven.
[0052] exist Figure 5 In the embodiment shown, in order to form the negative pressure cavity 5, the middle part of the cover plate 4 arches backward.
[0053] In some embodiments, in order to form a negative pressure chamber 5, a portion of the rear wall 22 arches forward, and this portion is covered by a cover plate 4.
[0054] In some embodiments, in order to form a negative pressure chamber 5, a portion of the rear wall 22 arches forward and is covered by a cover plate 4; and the middle portion of the cover plate 4 arches backward.
[0055] See Figures 3 to 6 The hot air blower 6 also includes an impeller 63 disk, which is fixed to the output shaft 61. The fan blades 62 include multiple main blades 621 and multiple auxiliary blades 622. Each main blade 621 protrudes from the front side of the impeller 63 disk, and each auxiliary blade 622 protrudes from the rear side of the impeller 63 disk. The main blades 621 ensure that the hot air blower 6 can fully agitate the high-temperature water vapor in the cooking chamber 21. The auxiliary blades 622 ensure that a large negative pressure is generated in the air inlet 221 and the negative pressure chamber 5, which is conducive to the rapid entry of outside air into the cooking chamber 21 through the air inlet pipe 7, the negative pressure chamber 5, and the air inlet 221, thereby accelerating the speed at which excess water vapor in the inner liner 2 is discharged from the inner liner 2 through the exhaust pipe 8.
[0056] contrast Figure 4 and Figure 6 The air inlet 221 is a round hole, and the output shaft 61 is coaxially arranged with the air inlet 221. The auxiliary blades 622 are evenly distributed around the circumference of the output shaft 61. This facilitates the stable entry of outside air into the cooking cavity 21, which helps to ensure the cooking effect of the steam oven.
[0057] contrast Figure 4 and Figure 6 Each auxiliary blade 622 is located outside the area directly in front of the air inlet 221. This helps to generate a larger negative pressure in the air inlet 221 and the cooking cavity 21, which in turn facilitates the rapid entry of outside air into the cooking cavity 21 through the air inlet pipe 7, the negative pressure chamber 5 and the air inlet 221, thereby accelerating the speed at which excess water vapor in the inner pot 2 is discharged from the inner pot 2 through the exhaust pipe 8.
[0058] contrast Figure 3 and Figure 4 The portion of the rear wall 22 near the air inlet 221 is recessed to form a recessed cavity 222, with the auxiliary fan blade 62 located within the recessed cavity 222. This expands the space near the auxiliary fan blade 62, allowing for a larger design height for the auxiliary fan blade 62 (i.e., the dimension of the auxiliary fan blade 62 in the front-to-back direction). Thus, during the operation of the hot air blower 6, the auxiliary fan blade 62 can generate a greater negative pressure, thereby increasing the negative pressure within the air inlet 221 and the negative pressure cavity 5. This accelerates the entry of outside air into the cooking cavity 21 through the air inlet pipe 7, the negative pressure cavity 5, and the air inlet 221, thereby accelerating the discharge of excess water vapor from the inner liner 2 through the exhaust pipe 8.
[0059] Preferably, the steam engine also includes multiple threaded connectors distributed around the elastic sealing ring 9, and the cover plate 4 and the rear wall 22 are fixedly connected by the multiple threaded connectors. In this way, tightening the threaded connectors can fix the cover plate 4 and the rear wall 22 together and press the elastic sealing ring 9 against the rear wall 22; unscrewing the threaded connectors can remove the cover plate 4 and replace the elastic sealing ring 9.
[0060] See Figure 8 The cover plate 4 has a mounting groove 4221 on the side facing the rear wall 22. The mounting groove 4221 conforms to the shape of the elastic sealing ring 9. The elastic sealing ring 9 is partially located inside the mounting groove 4221 and partially protrudes from the mounting groove 4221. On the one hand, the mounting groove 4221 limits the elastic sealing ring 9, making it easy to install. On the other hand, the elastic sealing ring 9 protrudes from the mounting groove 4221, so that during the tightening of the threaded connection, the elastic sealing ring 9 will be clamped and deformed by the cover plate 4 and the rear wall 22, thereby sealing the gap between the cover plate 4 and the rear wall 22.
[0061] In other embodiments, a mounting groove 4221 is provided on the side of the rear wall 22 facing the cover plate 4. The mounting groove 4221 conforms to the shape of the elastic sealing ring 9, with part of the elastic sealing ring 9 located within the mounting groove 4221 and part of it protruding from the mounting groove 4221. In short, in some embodiments, the mounting groove 4221 is provided on the side of the cover plate 4 facing the cover plate 4; in other embodiments, the mounting groove 4221 is provided on the side of the rear wall 22 facing the cover plate 4.
[0062] See Figure 8 The cover plate 4 includes a cavity portion 41 and a mounting portion 42. The cavity portion 41 and the rear wall 22 together enclose the negative pressure cavity 5. The mounting portion 42 surrounds the cavity portion 41 and includes an inner ring 421, a middle ring 422, and an outer ring 423 arranged sequentially from the inside to the outside. A mounting groove 4221 is provided in the middle ring 422. The inner ring 421 is fitted to the rear wall 22, and the outer ring 423 is spaced apart from the rear wall 22. Each threaded connector is provided in the outer ring 423. This facilitates the compression of the elastic sealing ring 9 during the tightening of each threaded connector, so that the elastic sealing ring 9 reliably seals the gap between the cover plate 4 and the rear wall 22.
[0063] See Figure 7 The outer ring 423 has multiple first holes 4231. (See reference...) Figure 5 The rear wall 22 is provided with multiple second holes 223. The first hole 4231, the second hole 223 and the threaded connector are provided in a one-to-one correspondence, and each threaded connector passes through the corresponding first hole 4231 and second hole 223.
[0064] See Figure 8The elastic sealing ring 9 includes a base ring 94 and a first ring 91, a second ring 92, and a third ring 93, all protruding from the same side of the base ring 94. The first ring 91, second ring 92, and third ring 93 conform to the shape of the base ring 94. Furthermore, the second ring 92 is spaced around the first ring 91, and the third ring 93 is spaced around the second ring 92. Thus, during the tightening of the various threaded connections, the first ring 91, second ring 92, and third ring 93 are easily deformed under pressure, which helps the elastic sealing ring 9 reliably seal the gap between the cover plate 4 and the rear wall 22.
[0065] See Figure 8 and Figure 9 The first ring 91, the second ring 92, and the third ring 93 all protrude from the side of the base ring 94 away from the cover plate 4. The side of the base ring 94 facing the cover plate 4 is flat, and the bottom wall of the mounting groove 4221 is flat. The side of the base ring 94 facing the cover plate 4 is fitted against the bottom wall of the mounting groove 4221. This facilitates the installation of the elastic sealing ring 9 into the mounting groove 4221.
[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.
Claims
1. A steam oven, characterized in that, include: Box; The inner liner, located in the box body, has a cooking cavity and a rear wall, and the rear wall is provided with an air inlet; A steam generator is connected to the cooking cavity; A cover plate is fixedly installed on the rear wall and together with the rear wall, encloses the negative pressure cavity; A hot air blower includes an output shaft and fan blades. The output shaft passes through the negative pressure chamber and the air inlet. The fan blades are located inside the cooking chamber and are positioned close to the air inlet. The air inlet is located directly behind the fan blades. An intake pipe and an exhaust pipe are provided, wherein the intake pipe, the negative pressure chamber, the air inlet, the cooking chamber, and the exhaust pipe are sequentially connected, and both the intake pipe and the exhaust pipe are connected to the outside. An elastic sealing ring is arranged around the negative pressure chamber; the cover plate presses the elastic sealing ring against the rear wall to seal the gap between the cover plate and the rear wall.
2. The steam oven according to claim 1, characterized in that, The hot air blower also includes an impeller disk, which is fixed to the output shaft; the fan blades include multiple main blades and multiple auxiliary blades, each main blade protruding from the front side of the impeller disk, and each auxiliary blade protruding from the rear side of the impeller disk.
3. The steam oven according to claim 2, characterized in that, The air inlet is a circular hole, the output shaft is coaxially arranged with the air inlet, and the auxiliary blades are evenly distributed around the circumference of the output shaft.
4. The steam oven according to claim 2, characterized in that, Each of the auxiliary blades is located outside the area directly in front of the air inlet.
5. The steam oven according to claim 2, characterized in that, The portion of the rear wall near the air inlet sinks backward to form a recessed cavity, and the auxiliary fan blade portion is located within the recessed cavity.
6. The steam oven according to claim 1, characterized in that, The steam engine also includes a plurality of threaded connectors, which are distributed around the elastic sealing ring, and the cover plate and the rear wall are fixedly connected by the plurality of threaded connectors.
7. The steam oven according to claim 6, characterized in that, The cover plate has a mounting groove on the side facing the rear wall. The mounting groove is conformal to the elastic sealing ring. The elastic sealing ring is partially located in the mounting groove and partially protrudes from the mounting groove.
8. The steam oven according to claim 7, characterized in that, The cover plate includes a cavity portion and a mounting portion. The cavity portion and the rear wall together form a negative pressure cavity. The mounting portion surrounds the cavity portion. The mounting portion includes an inner ring, a middle ring, and an outer ring arranged sequentially from the inside to the outside. The mounting groove is provided in the middle ring. The inner ring is fitted to the rear wall. The outer ring is spaced apart from the rear wall. Each threaded connector is provided in the outer ring.
9. The steam oven according to claim 8, characterized in that, The elastic sealing ring includes a base ring and a first ring, a second ring, and a third ring, all protruding from the same side of the base ring. The first ring, the second ring, and the third ring are all conformal to the shape of the base ring. Furthermore, the second ring is arranged around the first ring at intervals, and the third ring is arranged around the second ring at intervals.
10. The steam oven according to claim 9, characterized in that, The first ring, the second ring, and the third ring all protrude from the base ring on the side away from the cover plate. The side of the base ring facing the cover plate is a plane, and the bottom wall of the mounting groove is a plane. The side of the base ring facing the cover plate is fitted to the bottom wall of the mounting groove.