cooking utensils

Abstract

The present invention discloses a cooking appliance comprising: a housing, a steam inlet and exhaust system, and an oxygen inlet and exhaust system. The housing defines an inner cavity; the steam inlet and exhaust system is disposed on the housing and is capable of discharging steam toward the top of the inner cavity; and the oxygen inlet and exhaust system is disposed on the housing and is capable of exhausting steam from the inner cavity. The cooking appliance can rapidly adjust the oxygen content within the inner cavity, thereby rapidly switching between different cooking modes. The oxygen content within the inner cavity is maintained within an optimal range under different cooking modes, thereby achieving better cooking results.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking utensils, and in particular to a cooking utensil. Background Art

[0002] In the prior art, cooking appliances achieve the purpose of exhausting oxygen from the cooking cavity by rapidly injecting steam into the cooking cavity. Since the steam flows into the cooking cavity at a high speed, it will be strongly entrained with the air, resulting in a slow oxygen exhaust rate. In addition, when there is high-temperature steam in the cooking cavity for wet baking, since most of the cooking cavity is filled with steam, in order to increase the oxygen content in the cooking cavity, the steam injection is generally reduced, and the steam content is reduced by slowly dissipating the steam itself to achieve the purpose of increasing the oxygen content in the cooking cavity. Therefore, the oxygen addition and exhaust rates are slow, and the oxygen content in the cooking cavity cannot be quickly adjusted. There is room for improvement. Summary of the Invention

[0003] The present invention aims to at least partially address one of the aforementioned technical problems in the prior art. To this end, the present invention provides a cooking appliance that can rapidly adjust the oxygen content within its interior cavity, thereby rapidly switching between different cooking modes and maintaining the oxygen content within the interior cavity within an optimal range under each cooking mode, thereby achieving improved cooking performance.

[0004] According to an embodiment of the present invention, the cooking appliance includes: a box body having an inner cavity; a steam inlet and oxygen exhaust system, which is arranged on the box body and can discharge steam to the top of the inner cavity; and an oxygen inlet and exhaust system, which is arranged on the box body and can exhaust the steam in the inner cavity.

[0005] According to the cooking appliance of an embodiment of the present invention, the cooking appliance can quickly adjust the oxygen content in the inner cavity, thereby quickly completing the switching of different cooking modes, and maintaining the oxygen content in the inner cavity within the most suitable range under different cooking modes, thereby making the cooking appliance have a better cooking effect on food.

[0006] In addition, the cooking appliance according to the embodiment of the invention may also have the following additional technical features:

[0007] According to some embodiments of the present invention, the inner cavity includes: a cooking cavity and an air intake interlayer cavity located above the cooking cavity and connected to the cooking cavity, and the steam intake and oxygen exhaust system is suitable for discharging steam into the air intake interlayer cavity.

[0008] According to some embodiments of the present invention, the steam intake and oxygen exhaust system includes: a steam generator, which is arranged outside the inner cavity and communicates with the air intake interlayer cavity.

[0009] According to some embodiments of the present invention, the steam intake and oxygen exhaust system further includes: a partition, which is arranged between the cooking cavity and the air intake interlayer cavity, and the air intake interlayer cavity is defined between the partition and the top wall of the box body, and a plurality of air holes are opened on the partition.

[0010] According to some embodiments of the present invention, an air inlet is provided on the peripheral wall of the box body, and steam is ejected inwardly from the air inlet along the transverse direction of the air inlet interlayer cavity.

[0011] According to some embodiments of the present invention, the steam is jetted from one side of the air inlet interlayer cavity to the other side, and the diameter of the air holes near the upstream of the steam is larger than the diameter of the air holes near the downstream of the steam.

[0012] According to some embodiments of the present invention, the density of the air holes in a portion close to the upstream of the steam is greater than the density of the air holes in a portion close to the downstream of the steam.

[0013] According to some embodiments of the present invention, the partition has a first area, a second area and a third area, the first area is located at one lateral end of the partition and close to the air inlet, the second area is located at the other lateral end of the partition and at least a portion of the second area is vertically opposite to the extension line of the air inlet, the third area is located on both longitudinal sides of the second area, the second area does not have the air holes, and the diameter and opening density of the air holes on the first area are greater than the diameter and opening density of the air holes on the third area.

[0014] According to some embodiments of the present invention, the oxygen intake and exhaust system includes: a hot air mechanism, a gas through hole is opened on the box body, and the hot air mechanism is suitable for discharging the steam in the inner cavity to the outside through the gas through hole and / or sucking the outside air into the inner cavity through the gas through hole.

[0015] According to some embodiments of the present invention, the oxygen intake and exhaust system further includes: a closing mechanism, wherein the closing mechanism is suitable for opening or blocking the gas through hole.

[0016] According to some embodiments of the present invention, the hot air mechanism is arranged on the peripheral wall of the box body, and the hot air mechanism includes: a heating element and a fan mechanism, and the heating element is arranged around the fan mechanism.

[0017] According to some embodiments of the present invention, the fan mechanism includes: fan blades and a first drive motor, the fan blades are arranged inside the box, the first drive motor is arranged outside the box, and the first drive motor is drive-connected to the fan blades.

[0018] According to some embodiments of the present invention, the gas through holes are opened on the peripheral wall of the box body, and the gas through holes are located within the outer circumferential covering surface of the fan blade.

[0019] According to some embodiments of the present invention, the oxygen intake and exhaust system further includes: a hot air orifice plate, the hot air orifice plate being blocked between the inner cavity and the hot air mechanism, and having a connecting hole.

[0020] According to some embodiments of the present invention, the closing mechanism is arranged on the outside of the box body, and the closing mechanism includes: a second drive motor, a rotating shaft and a sealing cover, the sealing cover is connected to the rotating shaft, and the second drive motor is suitable for driving the rotating shaft to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of a partial structure of a cooking utensil according to an embodiment of the present invention;

[0022] Figure 2 is a schematic structural diagram of a cooking utensil according to an embodiment of the present invention;

[0023] Figure 3 is a partial structural sectional view of a cooking utensil according to an embodiment of the present invention;

[0024] Figure 4 is a structural schematic diagram of a steam intake and oxygen exhaust system according to an embodiment of the present invention;

[0025] Figure 5 is a partial exploded view of a steam intake and oxygen exhaust system according to an embodiment of the present invention;

[0026] Figure 6 is a schematic structural diagram of a partition according to an embodiment of the present invention;

[0027] Figure 7 is a schematic structural diagram of a cooking utensil according to an embodiment of the present invention;

[0028] Figure 8 is an exploded diagram of an oxygen intake and exhaust system according to an embodiment of the present invention;

[0029] Figure 9 is a partial structural diagram of an oxygen intake and exhaust system according to an embodiment of the present invention;

[0030] Figure 10 2 is a schematic structural diagram of a closing mechanism according to an embodiment of the present invention.

[0031] Reference numerals:

[0032] Cooking appliance 100, box body 1, top wall 11, peripheral wall 12, inner cavity 2, cooking cavity 21, air intake interlayer cavity 22, steam intake and oxygen exhaust system 3, steam generator 31, partition 32, first area 321, second area 323, third area 322, air hole 324, air inlet 33, oxygen intake and exhaust system 4, hot air mechanism 41, heating element 411, fan mechanism 412, fan blades 4121, first drive motor 4122, closing mechanism 42, second drive motor 421, rotating shaft 422, sealing cover 423, hot air hole plate 43, connecting hole 431, leakage net 432, gas through hole 44. DETAILED DESCRIPTION

[0033] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections, or communication; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0038] Reference below Figures 1-10 A cooking appliance 100 according to an embodiment of the present invention is described.

[0039] The cooking appliance 100 according to the embodiment of the present invention may include: a cabinet 1 , a steam intake and oxygen exhaust system 3 , and an oxygen intake and exhaust system 4 .

[0040] like Figure 1-Figure 3 As shown, the cooking appliance 100 of the embodiment of the present invention is a cooking appliance 100 that can cook food using steam, specifically a steamer or oven. When cooking food in a steamer or oven, the oxygen content within the cooking cavity 21 of the cooking appliance 100 affects the nutrient retention rate of the food during steam cooking and the production of harmful substances in the food during grilling. Therefore, in different cooking modes, it is necessary to adjust the oxygen content within the cooking cavity 21 to achieve better cooking results and healthier cooked food.

[0041] Conventional cooking appliances achieve the purpose of expelling oxygen from the cooking cavity by rapidly injecting steam into the cooking cavity. However, the high-speed steam flowing into the cooking cavity will cause strong entrainment with the air, resulting in a slow oxygen exhaust rate. In addition, when wet baking is performed in the presence of high-temperature steam in the cooking cavity, most of the cooking cavity is filled with steam. In order to increase the oxygen content in the cooking cavity, the steam injection is generally reduced, and the steam content is reduced through the slow dissipation of the steam itself to achieve the purpose of increasing the oxygen content in the cooking cavity. Therefore, the oxygen addition and exhaust rates are slow, making it impossible to quickly adjust the oxygen content in the cooking cavity.

[0042] To this end, the present invention provides a cooking appliance 100 equipped with a steam inlet and exhaust system 3 capable of rapid oxygen exhaust and an oxygen inlet and exhaust system 4 capable of rapid oxygen addition. These systems work together to dynamically and rapidly adjust the oxygen content within the cooking cavity 21. This allows the cooking appliance 100 to rapidly adjust the oxygen content within the cooking cavity 21, enabling rapid switching between cooking modes. Furthermore, the oxygen content within the cooking cavity 21 is maintained within an optimal range under each cooking mode, resulting in healthier and more flavorful cooked food.

[0043] The box body 1 has an inner cavity 2, and the steam inlet and exhaust oxygen system 3 is arranged on the box body 1 (refer to Figure 1 and Figure 4 ) to discharge steam into the inner cavity 2 of the housing 1, and the steam inlet and oxygen exhaust system 3 can discharge steam toward the top of the inner cavity 2. As a result, the steam discharged into the inner cavity 2 by the steam inlet and oxygen exhaust system 3 forms a stable steam layer at the top of the inner cavity 2, and this steam layer can slowly move from top to bottom to stably discharge the air in the inner cavity 2 from the bottom of the inner cavity 2, thereby reducing the degree of mixing between steam and air, thereby increasing the air discharge rate and oxygen discharge rate.

[0044] Furthermore, since the density of steam is lower than that of air, the steam inlet and oxygen exhaust system 3 discharges steam at the top of the inner cavity 2 so that the steam can fill the entire inner cavity 2 from top to bottom, and at the same time, the air originally in the inner cavity 2 is discharged from the cooking appliance 100, so as to further reduce the degree of mixing of steam and air and increase the speed at which steam fills the inner cavity 2, thereby achieving the purpose of increasing the oxygen exhaust speed of the cooking appliance 100 and enabling the cooking appliance 100 to quickly adjust the oxygen content in the cooking cavity 21.

[0045] Furthermore, the oxygen intake and exhaust system 4 is arranged on the box body 1 (refer to Figure 7 and Figure 8 ), the oxygen intake and exhaust system 4 can discharge the steam in the inner cavity 2, so that the steam content in the inner cavity 2 is rapidly reduced. At the same time, the outside air can quickly flow into the inner cavity 2, so that the oxygen content in the inner cavity 2 can be rapidly increased.

[0046] In summary, the cooking appliance 100 achieves a dynamic and rapid change in the oxygen content inside the cooking cavity 21 under the joint action of the steam inlet and exhaust system 3 and the oxygen inlet and exhaust system 4, thereby achieving the purpose of quickly adjusting the oxygen content in the cooking cavity 21.

[0047] According to the cooking utensil 100 of an embodiment of the present invention, the cooking utensil 100 can quickly adjust the oxygen content in the inner cavity 2, thereby quickly completing the switching of different cooking modes, and maintaining the oxygen content in the inner cavity 2 within the most suitable range under different cooking modes, thereby making the cooking utensil have a better cooking effect on food.

[0048] like Figure 3 As shown, the inner cavity 2 includes a cooking cavity 21 and an air intake interlayer cavity 22 located above and communicating with the cooking cavity 21. Specifically, the cooking cavity 21 communicates with the air intake interlayer cavity 22, allowing gas within the air intake interlayer cavity 22 to flow into the cooking cavity 21. The steam intake and oxygen exhaust system 3 is adapted to discharge steam into the air intake interlayer cavity 22. Since the steam flow entering from the steam intake and oxygen exhaust system 3 is diffused and decelerated within the air intake interlayer cavity 22, the flow rate of steam entering the cooking cavity 21 from the air intake interlayer cavity 22 is reduced. Furthermore, the steam forms a stable steam layer within the air intake interlayer cavity 22, which slowly moves from top to bottom, steadily exhausting the air within the cooking cavity 21 from the bottom of the cooking cavity 21. This reduces the degree of mixing between steam and air, increases the air exhaust rate, and thus improves the oxygen exhaust rate of the cooking appliance 100, enabling the cooking appliance 100 to quickly adjust the oxygen content within the cooking cavity 21.

[0049] Combine Figure 1 、 Figure 3 and Figure 4 In the illustrated embodiment, the steam intake and oxygen exhaust system 3 includes a steam generator 31. The steam generator 31 converts liquid water into high-temperature steam through high-temperature heating, which is used to steam-heat food. The steam generator 31 is positioned outside the inner cavity 2 so that it does not occupy the cooking space within the cooking appliance 100. This allows the cooking cavity 21 to be larger, further increasing the capacity of the cooking appliance 100. Furthermore, the steam generator 31 is in communication with the air intake interlayer cavity 22, enabling it to discharge steam into the interlayer cavity 22.

[0050] like Figure 2 、 Figure 3 and Figure 5As shown, the steam intake and oxygen exhaust system 3 further includes a partition 32 disposed between the cooking cavity 21 and the air intake interlayer cavity 22 to separate the cooking cavity 21 from the air intake interlayer cavity 22. The air intake interlayer cavity 22 is defined between the partition 32 and the top wall 11 of the housing 1, such that the air intake interlayer cavity 22 is located at the uppermost end of the entire housing 1. The partition 32 is provided with a plurality of air holes 324 to connect the air intake interlayer cavity 22 with the cooking cavity 21. This allows steam within the air intake interlayer cavity 22 to enter the cooking cavity 21 through the plurality of air holes 324. In other words, the steam layer formed within the air intake interlayer cavity 22 needs to further pass through the air holes 324 provided on the partition 32 before it can move downward. This further reduces the flow rate of steam into the cooking cavity 21, thereby reducing the degree of mixing between steam and air and increasing the air exhaust rate, thereby further improving the oxygen exhaust rate of the cooking appliance 100.

[0051] Reference Figure 1 、 Figure 3 and Figure 4 , an air inlet 33 is opened on the peripheral wall 12 (side wall) of the box body 1, and steam is ejected inwardly along the transverse direction of the air inlet interlayer cavity 22 from the air inlet 33 to avoid the steam entering the air inlet interlayer cavity 22 from the air inlet 33 directly impacting the air holes 324 and directly flowing into the cooking cavity 21 from the air holes 324, which causes the steam to be unable to form a stable steam layer in the air inlet interlayer cavity 22, thereby avoiding the phenomenon that the steam flow rate cannot be reduced by the partition 32. Therefore, the steam is ejected inwardly along the transverse direction of the air inlet interlayer cavity 22 from the air inlet 33, so that the steam flow flowing in from the air inlet 33 can first pass through the obstruction and return of the peripheral wall 12 (side wall) on the opposite side, and then flow downward after the speed is slowed down, so as to ensure that a stable steam layer can be formed in the air inlet interlayer cavity 22, so as to further reduce the flow rate of steam flowing into the cooking cavity 21, thereby reducing the mixing degree of steam and air, and improving the air discharge rate and the oxygen discharge rate of the cooking appliance 100.

[0052] Furthermore, the steam is ejected from one side of the air inlet interlayer cavity 22 to the other side. Since the steam is ejected inwardly along the transverse direction of the air inlet interlayer cavity 22 from the air inlet port 33, and is blocked and turned back by the peripheral wall 12 on the opposite side, the steam flow slows down and then flows downward. Since the downstream of the steam is close to the peripheral wall 12 on the opposite side, the steam flow is initially decelerated by the peripheral wall 12 and has not yet experienced further deceleration, so that the steam flow speed at the downstream of the steam is faster, while the upstream of the steam is far from the peripheral wall 12 on the opposite side. The steam flow is further decelerated during the reflux process, so that the steam flow speed at the upstream of the steam is slower. Therefore, the diameter of the part of the air hole 324 near the upstream of the steam is set to be larger than that near the steam. The diameter of some of the air holes 324 at the downstream end is set, and the opening density of some of the air holes 324 near the upstream end of the steam is set to be greater than the opening density of some of the air holes 324 near the downstream end of the steam, so that the flow speed of the steam flowing out of each air hole 324 is basically the same, so that the steam flow speed at each position in the same plane is uniform, so that the steam can form a stable steam layer in the upper part of the cooking cavity 21, and then the steam layer can move downward evenly and stably, so as to further reduce the degree of mixing of steam and air, and increase the speed at which steam fills the cooking cavity 21, so as to further increase the oxygen exhaust speed of the cooking appliance 100, so that the cooking appliance 100 can quickly adjust the oxygen content in the cooking cavity 21.

[0053] like Figure 5 and Figure 6 As shown, according to the principle that the diameter of some of the air holes 324 near the upstream of the steam is larger than the diameter of some of the air holes 324 near the downstream of the steam, and the opening density of some of the air holes 324 near the upstream of the steam is larger than the opening density of some of the air holes 324 near the downstream of the steam, the partition 32 can be divided into three areas. Specifically, the partition 32 has a first area 321, a second area 323 and a third area 322, wherein the first area 321 is located at one lateral end of the partition 32 and is close to the air inlet 33, the second area 323 is located at the other lateral end of the partition 32 and at least a part of the second area 323 is arranged vertically opposite to the extension line of the air inlet 33, the third area 322 is located on both longitudinal sides of the second area 323, there are no air holes 324 on the second area 323, the diameter and opening density of the air holes 324 on the first area 321 are larger than the diameter and opening density of the air holes 324 on the third area 322. Furthermore, the area of ​​the first region 321 is larger than the total area of ​​the second region 323 and the third region 322 , so that the steam has sufficient space to settle.

[0054] Specifically, steam is ejected inwardly from the air inlet 33 along the transverse direction of the air inlet interlayer cavity 22. Due to its initial high flow velocity, steam is quickly ejected into the second region 323, generating a higher steam static pressure in the second region 323. Therefore, the second region 323 is not provided with air holes 324 to prevent excessive steam flow through the partition 32 there, which could affect the oxygen exhaust rate of the cooking appliance 100. Furthermore, after contacting the peripheral wall 12 and decelerating, the steam flow circulates around the third region 322 before reaching the first region 321. The steam flow velocity in the first region 321 is relatively slow, allowing most of the steam to settle evenly in the first region 321. The steam flow velocity in the third region 322 is relatively high, allowing the majority of the steam to settle evenly in the first region 321. Therefore, the diameter and density of the air holes 324 in the third region 322 are designed to be smaller than those in the first region 321. In this way, the flow rate of the steam airflow passing through each air hole 324 on the partition 32 can be made more uniform, so that the steam flow speed at each position in the same plane is uniform and consistent, so that the steam can form a stable steam layer in the upper part of the cooking cavity 21, and then the steam layer can move downward evenly and stably, so as to further reduce the degree of mixing of steam and air, increase the speed at which steam fills the cooking cavity 21, and thus further improve the oxygen exhaust speed of the cooking appliance 100.

[0055] The partition plate 32 may be integrally cast, that is, the air holes 324 may be directly formed on the partition plate 32 , or the air holes 324 may be processed on the partition plate 32 by a stamping process.

[0056] Furthermore, the partitions 32 may be multi-layered (not shown), with the multi-layered partitions 32 spaced apart from one another. The bottommost partition 32 defines an air intake interlayer cavity 22 between the top wall 11. As a result, the steam layer needs to be decelerated by the multi-layered partitions 32 during its downward movement, further reducing the flow rate of the steam into the cooking cavity 21 and thereby increasing the speed at which the steam fills the cooking cavity 21.

[0057] Furthermore, the air inlet 33 is located between the uppermost partition 32 and the top wall 11, so that the steam layer can pass through multiple partitions 32 in sequence during its downward movement, so as to maximize the use of the partitions 32 to reduce the flow speed of steam, so as to further increase the speed of steam filling the cooking cavity 21.

[0058] Furthermore, the air holes 324 on two adjacent layers of partitions 32 are staggered. In other words, the air holes 324 on two adjacent layers of partitions 32 are not arranged directly opposite each other. As a result, steam flowing from the air holes 324 of the upper layer of partitions 32 to the lower layer of partitions 32 is blocked by the plate body of the lower layer of partitions 32. After further deceleration, it passes through the air holes 324 of the lower layer of partitions 32 to flow into the next layer, thereby achieving a step-by-step deceleration of the steam airflow between the multiple layers of partitions 32. The blocking effect of the multiple layers of partitions 32 is thus utilized to further reduce the steam airflow velocity, further increasing the speed at which steam fills the cooking cavity 21. This, in turn, improves the oxygen exhaust rate of the cooking appliance 100, allowing the cooking appliance 100 to quickly adjust the oxygen content within the cooking cavity 21.

[0059] Reference Figure 8 and Figure 9 The oxygen inlet and exhaust system 4 includes: a hot air mechanism 41, and a gas through hole 44 is opened on the box body 1, so that gas can flow into or out of the inner cavity 2 of the box body 1 through the gas through hole 44, wherein the hot air mechanism 41 is suitable for discharging the steam in the inner cavity 2 to the outside through the gas through hole 44 and / or sucking the outside air into the inner cavity 2 through the gas through hole 44, so as to provide power for the exchange of steam in the inner cavity 2 and the outside air, so that the speed of oxygen entering the inner cavity 2 is faster, thereby achieving the purpose of increasing the oxygen addition speed of the cooking appliance 100 and enabling the cooking appliance 100 to quickly adjust the oxygen content in the cooking cavity 21.

[0060] According to some embodiments of the present invention, the hot air mechanism 41 can discharge the steam in the inner cavity 2 outward from the gas through hole 44. Specifically, the hot air mechanism 41 can form a negative pressure space at the gas through hole 44, so that the steam flows from the inner cavity 2 to the outside of the box body 1, thereby discharging the steam in the inner cavity 2 and rapidly reducing the steam content in the inner cavity 2. At the same time, a negative pressure space is formed in the inner cavity 2 due to the discharge of a large amount of steam, so that the outside air can quickly flow into the inner cavity 2, thereby rapidly increasing the oxygen content in the inner cavity 2.

[0061] According to other embodiments of the present invention, the hot air mechanism 41 can suck outside air into the inner cavity 2 through the gas through hole 44. The outside air can flow rapidly into the inner cavity 2 through the gas through hole 44 under the push of the hot air mechanism 41, and squeeze the steam in the inner cavity 2 to discharge the steam from the inner cavity 2, thereby allowing the oxygen content in the inner cavity 2 to be rapidly increased.

[0062] Combine Figure 7 and Figure 8In the illustrated embodiment, the oxygen intake and exhaust system 4 further includes: a closing mechanism 42, which is suitable for opening or blocking the gas through hole 44, so that the gas through hole 44 can be opened when the cooking appliance 100 needs to increase the oxygen content, and closed when the cooking appliance 100 is cooking food normally, so as to avoid energy loss and waste caused by a large amount of steam loss inside the cooking appliance 100 due to steam flowing out of the inner cavity 2 from the gas through hole 44 when the cooking appliance 100 uses steam to cook food normally.

[0063] like Figure 8 and Figure 9 As shown, the hot air mechanism 41 is arranged on the peripheral wall 12 (rear wall) of the box body 1 , and the hot air mechanism 41 includes: a heating element 411 and a fan mechanism 412 , and the heating element 411 is arranged around the fan mechanism 412 .

[0064] The fan mechanism 412 draws air into the inner cavity 2, allowing outside air to be drawn into the inner cavity 2 through the gas passage 44, thereby achieving rapid oxygenation. When the fan mechanism 412 draws outside air into the inner cavity 2 through the gas passage 44, the lower temperature of the outside air causes the internal temperature of the cooking appliance 100 to drop significantly after entering the inner cavity 2, thereby deteriorating the cooking effect. Therefore, a heating element 411 is disposed around the outer periphery of the fan mechanism 412 to heat the air before it enters the inner cavity 2, ensuring a constant temperature within the cooking appliance 100 and improving the cooking effect of the cooking appliance 100.

[0065] In addition, the fan mechanism 412 can also blow air in the opposite direction of the inner cavity 2 of the box body 1 on the peripheral wall 12 of the box body 1, so that the steam can flow out of the inner cavity 2 to the outside of the box body 1, thereby discharging the steam in the inner cavity 2, so that the steam content in the inner cavity 2 is rapidly reduced. At the same time, the outside air can flow rapidly into the inner cavity 2, so that the oxygen content in the inner cavity 2 can be rapidly increased.

[0066] Combine Figure 7-Figure 9In the illustrated embodiment, the fan mechanism 412 includes blades 4121 and a first drive motor 4122. A peripheral wall 12 on one side of the housing 1, where the hot air mechanism 41 is located, protrudes outward, and a first installation space is defined within the protruding peripheral wall 12. The blades 4121 are disposed within the housing 1. Specifically, the blades 4121 are disposed within the first installation space within the housing 1, while the first drive motor 4122 is disposed outside the housing 1. This ensures that neither the blades 4121 nor the first drive motor 4122 occupy space within the housing 1 used for cooking. This allows for a larger cooking cavity 21, further increasing the capacity of the cooking appliance 100. Furthermore, the first drive motor 4122 is operatively coupled to the blades 4121, such that when the oxygen content within the inner cavity 2 needs to be increased, the first drive motor 4122 drives the blades 4121 to rotate.

[0067] Reference Figure 8 and Figure 9 Gas holes 44 are formed on the peripheral wall 12 of the housing 1 and are located within the outer circumferential surface of the fan blades 4121. In other words, gas holes 44 are located within the circle formed by the tips of the fan blades 4121. When the cooking appliance 100 requires oxygenation, the drive motor 4122 rotates the fan blades 4121, creating a negative pressure within the circle formed by the tips of the fan blades 4121. This rapidly expels the slightly positive high-temperature steam within the inner cavity 2. At this point, negative pressure forms within the inner cavity 2, allowing outside air to enter the inner cavity 2 through the gaps in the cooking appliance 100, thereby increasing the oxygen content within the inner cavity 2.

[0068] Reference Figure 8 , combined with Figure 1 and Figure 2 As shown, the oxygen intake and exhaust system 4 further includes a hot air orifice plate 43, which is positioned between the inner cavity 2 and the hot air mechanism 41 to define a first installation space between the hot air orifice plate 43 and the peripheral wall 12. The hot air orifice plate 43 is capable of isolating the hot air mechanism 41 from the food in the cooking cavity 21 to prevent the hot air mechanism 41 from affecting the normal cooking of the food. Furthermore, the hot air orifice plate 43 has a connecting hole 431 to facilitate gas circulation, and a leakage net 432 is provided on the connecting hole 431 to prevent food residue from entering the hot air mechanism 41 and causing damage to the hot air mechanism 41 or clogging the gas passage 44.

[0069] like Figure 7 、 Figure 8 and Figure 10As shown, the closing mechanism 42 is disposed outside the housing 1 to prevent the closing mechanism 42 from affecting the operation of the fan blades 4121 and occupying space within the housing 1. The closing mechanism 42 comprises a second drive motor 421, a rotating shaft 422, and a sealing cover 423. The sealing cover 423 is connected to the rotating shaft 422. The second drive motor 421 is adapted to drive the rotating shaft 422 to rotate. The rotation of the rotating shaft 422 driven by the second drive motor 421 drives the sealing cover 423 to rotate, thereby opening or sealing the gas through-hole 44.

[0070] According to some embodiments of the present invention, a steam generator is composed of a water pipe and a heating element. Liquid water is converted into water vapor within the water pipe, and the water vapor is transported to the interior of the steam appliance so that the heated water vapor can heat and cook food within the steam appliance. Optionally, the heating element is disposed inside and / or outside the water pipe to heat the water pipe, thereby heating the liquid water within the water pipe or directly heating the liquid water so that it is converted from liquid water to water vapor after heating. That is, the heating element can be disposed inside or outside the water pipe, or both inside and outside the water pipe, to improve heating efficiency and, thereby, improve the efficiency of water vapor generation.

[0071] Furthermore, the water pipe is constructed to be able to expand and contract as the temperature it is exposed to changes. Since the water pipe will produce temperature changes during the operation of the steam generator, that is, the heater continues to heat the water pipe, causing the temperature of the water pipe to continue to rise, and when cold water flows into the water pipe, the temperature of the water pipe will temporarily drop. Therefore, the water pipe will continuously expand and contract automatically as the temperature changes. Since the expansion and contraction of the water pipe will change the inner wall area of ​​the water pipe, the scale accumulated on the inner wall of the water pipe will fall off from the inner wall of the water pipe during the expansion and contraction of the water pipe and be discharged to the outside of the water pipe along with the flow of water. Therefore, there is no need to manually add cleaning substances such as citric acid to clean the scale in the water pipe, which makes the cleaning of the scale in the steam generator more convenient and avoids damage to the steam generator caused by the accumulation of scale in the water pipe.

[0072] Moreover, since the embodiment of the present invention adopts the form of a flow-type steam generator with a heating element and a water pipe, the overall structure can be flatter and smaller in overall size, with lower requirements for installation space, easier layout, and can meet horizontal or side installation requirements.

[0073] According to some embodiments of the present invention, the water pipe is adapted to extend as the temperature to which it is subjected increases, and to shorten as the temperature to which it is subjected decreases. That is, during the operation of the steam generator, the temperature of the water pipe gradually increases under the heating action of the heating element, and the water pipe will gradually extend as the temperature to which it is subjected gradually increases. When the steam generator stops heating, the heating element stops heating the water pipe, and the temperature of the water pipe gradually decreases to room temperature, and the water pipe will gradually shorten as the temperature decreases. Alternatively, during normal heating, the water flow in the water pipe will quickly take away the heat of the water pipe, and the water pipe will shorten as the temperature to which it is subjected suddenly decreases.

[0074] Therefore, during the operation of the steam generator, the water pipe will expand and contract multiple times, and the scale attached to the inner wall will be detached during the expansion and contraction process, so that the scale can be discharged from the water pipe along with the water flow, thereby avoiding the accumulation of scale and improving the safety of the steam generator.

[0075] According to some embodiments of the present invention, the water pipe is constructed as a memory alloy. A memory alloy is a material composed of two or more metallic elements. The memory alloy exhibits a shape memory effect through thermoelasticity and martensitic transformation, and its inverse transformation. Specifically, the water pipe exhibits a two-way memory effect, allowing it to extend upon heating due to the shape memory effect of the memory alloy and contract upon cooling. This allows the pipe to shed scale adhering to its inner wall during this process.

[0076] Preferably, the water pipe is constructed from a copper-zinc-aluminum shape memory alloy. Because copper-zinc-aluminum shape memory alloys are relatively inexpensive, have relatively stable properties, and do not produce harmful substances during high-temperature heating, using copper-zinc-aluminum shape memory alloys to manufacture water pipes can reduce manufacturing costs and improve steam generator safety. Of course, the present invention is not limited to this embodiment; the water pipe can also be manufactured using one or more of a copper-zinc-tin shape memory alloy, a copper-zinc-silicon shape memory alloy, or an iron-manganese-silicon shape memory alloy.

[0077] According to some embodiments of the present invention, the heating element includes a heating tube, wherein the water pipe is configured as a circular tube, and the heating tube is spirally wound around the outside of the circular tube to increase the contact area between the heating tube and the circular tube, thereby ensuring the heating effect of the heating tube on the circular tube. Furthermore, the spiral winding of the heating tube around the outside of the circular tube can ensure more uniform heating across the circular tube, thereby preventing deformation of the water pipe during the heating and elongation process due to uneven heating of the circular tube, thereby improving the safety of the steam generator installation.

[0078] According to other embodiments of the present invention, the heating element includes a heating plate, wherein the water pipe is configured as a square tube, and the heating plate is attached to at least one side wall of the square tube. The heating plate heats the side wall of the square tube to heat liquid water within the square tube, thereby converting the liquid water within the square tube into water vapor within the square tube and transporting it to the interior of the steam appliance. Furthermore, because the steam generator, comprising the heating plate and the square tube, can be formed into a flat square structure and can be attached to the inner wall of the interior space of the steam appliance, the overall structure of the steam appliance is more compact, thereby improving the utilization of the internal space of the steam appliance.

[0079] According to some embodiments of the present invention, a heat-conducting layer is provided between the heating element and the water pipe to make the water pipe heated more evenly, thereby avoiding deformation of the water pipe during the heating and elongation process due to uneven heating of the water pipe, thereby further improving the setting safety of the steam generator.

[0080] As a preferred embodiment, the heating element includes an electromagnetic induction coil, which is sleeved on the outside of the water pipe to heat the water pipe through the electromagnetic induction heating principle. This not only improves the heating effect, but also makes the structure simpler and the cost lower.

[0081] According to some embodiments of the present invention, the inner wall of the water pipe is constructed as a smooth inner wall, so that the scale accumulated on the inner wall of the water pipe is easier to fall off, so that the scale can be completely separated from the water pipe during the expansion and contraction of the water pipe, thereby further improving the descaling effect of the steam generator.

[0082] In other embodiments, the water pipe may be constructed as a resistance tube. The resistance tube has a certain resistance value due to its own material properties and is capable of converting electrical energy into thermal energy. The power supply device can provide electrical energy to the resistance tube so that the resistance tube can generate heat. The resistance tube has a liquid flow space, and one end of the liquid flow space in the resistance tube is connected to an external liquid source and the other end is connected to the steam generator's air outlet. Liquid water is converted from a liquid state to water vapor within the liquid flow space in the resistance tube. The power supply device is electrically connected to the resistance tube so that it can supply power to the resistance tube, causing the resistance tube to generate heat. After the power supply device supplies power to the resistance tube, the resistance tube can convert electrical energy into thermal energy, and the heat generated by the resistance tube can directly heat the liquid water within the liquid flow space. Therefore, the liquid water flowing into the liquid flow space from the external liquid source can be converted from a liquid state to water vapor after being heated. The converted water vapor is then transported from the steam generator's air outlet to the interior of the steam appliance, so that the heated water vapor can heat and cook food within the steam appliance.

[0083] According to some embodiments of the present invention, the power supply device includes: a power supply and a power supply wire. The power supply can be a DC power supply or an AC power supply. The power supply wire is electrically connected between the power supply and the resistor tube to transmit the current of the power supply to both ends of the resistor tube, thereby utilizing the thermal effect generated by the current flowing through the resistor tube to heat the liquid water and convert the liquid water into water vapor.

[0084] Furthermore, two power supply wires are provided, each connected to the outermost ends of the resistor tube in its extension direction. Specifically, the two power supply wires are adapted to be connected to the liquid inlet and gas outlet of the resistor tube, respectively, so that the entire resistance material of the resistor tube is subjected to the voltage across both ends, allowing the entire resistor tube to generate heat under the action of the power supply. This maximizes the heating area of ​​the resistor tube, thereby achieving a better heating effect. This improves the heating efficiency of the resistor tube and, in turn, the steam production efficiency of the steam generator.

[0085] Specifically, one power supply wire is connected near the junction of the water pipe and the resistor tube, and the other power supply wire is connected near the junction of the resistor tube and the steam generator's air outlet. This allows the entire resistor tube to generate heat, maximizing its heating area.

[0086] According to some embodiments of the present invention, an insulating protective layer is provided on the outside of the resistor tube, wherein the insulating protective layer provides effective insulation. Thus, if the resistor tube leaks or experiences other malfunctions, the insulating protective layer prevents the resistor tube from short-circuiting, thereby improving the operational stability of the steam generator and preventing the resistor tube from short-circuiting due to overlapping with surrounding components.

[0087] Furthermore, the resistance value of the resistor tube is related to the material of the resistor tube. The resistor tube can be constructed as a metal tube, a silicone tube or a graphite tube. Among them, the manufacturing materials of the metal tube, silicone tube and graphite tube are relatively cheap, which can reduce the overall cost of the steam generator. They also have good resistivity and are hard and not easy to damage, so the resistor tube has better heating effect and setting stability.

[0088] According to some embodiments of the present invention, the resistance value of the resistor tube is also related to the tube length and wall thickness of the resistor tube. Specifically, the thinner the wall thickness of the resistor tube, the greater the resistance and the smaller the power; the longer the tube length of the resistor tube, the greater the resistance and the smaller the power. Therefore, the wall thickness of the resistor tube is D, 0.1mm≤D≤10mm, that is, the wall thickness of the resistor tube is controlled between 0.1mm and 10mm, so that the resistor tube has a larger resistance value while ensuring the overall strength of the resistor tube, so that the resistor tube can release more heat to heat liquid water to generate water vapor.

[0089] Furthermore, the length of the resistor tube is L, 5cm≤L≤3m, that is, the length of the resistor tube 1 is controlled between 5cm and 3m, so that the resistor tube has a larger resistance value while ensuring that the overall weight and volume of the resistor tube are within a reasonable range, so that the resistor tube can release more heat to heat liquid water to generate water vapor.

[0090] According to some embodiments of the present invention, a power supply conductor is provided with an on / off protection device that ensures the safe operation of the steam generator. Specifically, if an abnormality occurs, such as insufficient water in the water box or a short circuit, the on / off protection device is adapted to automatically disconnect the power supply from the resistor tube. This prevents the power supply from continuously supplying power to the resistor tube, potentially causing circuit damage or thermal runaway, thereby improving the reliability and safety of the steam appliance.

[0091] According to some embodiments of the present invention, in order to conveniently adjust the temperature and efficiency of the steam generated by the steam generator to achieve free switching between different cooking modes, the embodiments of the present invention are further provided with a voltage regulating device on the power supply wire to adjust the heating power of the resistor tube by adjusting the voltage at both ends of the resistor tube, thereby achieving the purpose of changing the efficiency of the resistor tube in generating water vapor and the temperature of the generated water vapor.

[0092] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0093] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A cooking utensil, characterized in that: include: A box body, wherein the box body has an inner cavity; a steam inlet and oxygen exhaust system, the steam inlet and oxygen exhaust system being arranged on the box body and capable of exhausting steam to the top of the inner cavity; an oxygen intake and exhaust system, the oxygen intake and exhaust system being arranged on the box body and capable of exhausting steam in the inner cavity; The inner cavity comprises: a cooking cavity and an air intake interlayer cavity located above the cooking cavity and in communication with the cooking cavity; The steam intake and oxygen exhaust system further includes: a partition plate, which is arranged between the cooking cavity and the air intake interlayer cavity, and the air intake interlayer cavity is defined between the partition plate and the top wall of the box body, and a plurality of air holes are opened on the partition plate; The steam is jetted from one side of the air inlet interlayer cavity to the other side, and the diameter of the air holes near the upstream of the steam is larger than the diameter of the air holes near the downstream of the steam.

2. The cooking appliance according to claim 1, wherein The steam intake and oxygen exhaust system is suitable for discharging steam into the air intake interlayer cavity.

3. The cooking appliance according to claim 2, wherein: The steam intake and oxygen exhaust system includes a steam generator, which is arranged outside the inner cavity and communicated with the air intake interlayer cavity.

4. The cooking appliance according to claim 2, wherein: An air inlet is provided on the peripheral wall of the box body, and steam is ejected inwardly along the transverse direction of the air inlet interlayer cavity from the air inlet.

5. The cooking appliance according to claim 4, characterized in that The density of the air holes in a portion close to the upstream of the steam is greater than the density of the air holes in a portion close to the downstream of the steam.

6. The cooking appliance according to claim 5, characterized in that The partition has a first area, a second area and a third area, the first area is located at one lateral end of the partition and close to the air inlet, the second area is located at the other lateral end of the partition and at least a part of the second area is arranged vertically opposite to the extension line of the air inlet, the third area is located on both longitudinal sides of the second area, the second area does not have the air holes, and the diameter and opening density of the air holes on the first area are greater than the diameter and opening density of the air holes on the third area.

7. The cooking appliance according to claim 1, wherein The oxygen intake and exhaust system includes: a hot air mechanism, a gas through hole is opened on the box body, and the hot air mechanism is suitable for discharging the steam in the inner cavity from the gas through hole and / or sucking the outside air into the inner cavity from the gas through hole.

8. The cooking appliance according to claim 7, wherein: The oxygen intake and exhaust system further includes a closing mechanism, which is suitable for opening or closing the gas through hole.

9. The cooking appliance according to claim 8, characterized in that The hot air mechanism is arranged on the peripheral wall of the box body, and the hot air mechanism includes: a heating element and a fan mechanism, and the heating element is arranged around the fan mechanism.

10. The cooking appliance according to claim 9, characterized in that The fan mechanism includes: fan blades and a first drive motor. The fan blades are arranged inside the box, and the first drive motor is arranged outside the box. The first drive motor is drivingly connected to the fan blades.

11. The cooking appliance according to claim 10, wherein The gas through holes are opened on the peripheral wall of the box body, and the gas through holes are located within the outer circumferential covering surface of the fan blade.

12. The cooking appliance according to claim 9, wherein The oxygen intake and exhaust system further includes a hot air orifice plate, which is blocked between the inner cavity and the hot air mechanism and has a communicating hole.

13. The cooking appliance according to claim 8, wherein The closing mechanism is arranged on the outside of the box body, and comprises: a second driving motor, a rotating shaft and a sealing cover. The sealing cover is connected to the rotating shaft, and the second driving motor is suitable for driving the rotating shaft to rotate.

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